SPX CORP
S-4/A, 1998-09-03
METALWORKG MACHINERY & EQUIPMENT
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<PAGE>   1
 
   
   AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON SEPTEMBER 3, 1998
    
 
   
                                                      REGISTRATION NO. 333-60853
    
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                            ------------------------
 
   
                                AMENDMENT NO. 1
    
   
                                       TO
    
   
                                    FORM S-4
    
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933
                            ------------------------
 
                                SPX CORPORATION
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
 
<TABLE>
<CAPTION>
                 DELAWARE                                     3429                                    38-1016240
<S>                                        <C>                                        <C>
     (STATE OR OTHER JURISDICTION OF              (PRIMARY STANDARD INDUSTRIAL                     (I.R.S. EMPLOYER
                                                         CLASSIFICATION
      INCORPORATION OR ORGANIZATION)                      CODE NUMBER)                           IDENTIFICATION NO.)
</TABLE>
 
                            700 TERRACE POINT DRIVE
                         MUSKEGON, MICHIGAN 49443-3301
                                 (616) 724-5000
  (ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE, OF
                   REGISTRANT'S PRINCIPAL EXECUTIVE OFFICES)
 
                          CHRISTOPHER J. KEARNEY, ESQ.
                 VICE PRESIDENT, SECRETARY AND GENERAL COUNSEL
                                SPX CORPORATION
                            700 TERRACE POINT DRIVE
                         MUSKEGON, MICHIGAN 49443-3301
                                 (616) 724-5000
 (NAME, ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE,
                             OF AGENT FOR SERVICE)
 
                                   COPIES TO:
 
   
<TABLE>
<S>                                        <C>                                        <C>
           AVIVA DIAMANT, ESQ.                       JOANNE L. BOBER, ESQ.                      ERIC S. ROBINSON, ESQ.
 FRIED, FRANK, HARRIS, SHRIVER & JACOBSON    SENIOR VICE PRESIDENT, GENERAL COUNSEL         WACHTELL, LIPTON, ROSEN & KATZ
            ONE NEW YORK PLAZA                           AND SECRETARY                           51 WEST 52ND STREET
         NEW YORK, NEW YORK 10004                  GENERAL SIGNAL CORPORATION                  NEW YORK, NEW YORK 10019
              (212) 859-8000                  ONE HIGH RIDGE PARK, P.O. BOX 10010                   (212) 403-1000
                                                  STAMFORD, CONNECTICUT 06904
                                                         (203) 329-4100
</TABLE>
    
 
APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: As soon as
practicable after this Registration Statement becomes effective and all other
conditions to the merger (the "Merger") of General Signal Corporation ("General
Signal") with and into SAC Corp., pursuant to the Agreement and Plan of Merger,
dated as of July 19, 1998, among those two parties and SPX Corporation ("SPX"),
described in the enclosed Joint Proxy Statement/Prospectus, have been satisfied
or waived.
 
    If the securities being registered on this Form are being offered in
connection with the formation of a holding company and there is compliance with
General Instruction G, check the following box.  [ ]
 
    If this form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, check the following box and
list the Securities Act registration statement number of the earlier effective
registration statement for the same offering.  [ ]
 
    If this form is a post-effective amendment filed pursuant to Rule 462(d)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering.  [ ]
                        CALCULATION OF REGISTRATION FEE
 
   
<TABLE>
<S>                                     <C>                <C>                <C>                   <C>
- --------------------------------------------------------------------------------------------------------------------------
- --------------------------------------------------------------------------------------------------------------------------
         TITLE OF EACH CLASS                 AMOUNT        PROPOSED MAXIMUM     PROPOSED MAXIMUM          AMOUNT OF
            OF SECURITIES                     TO BE            OFFERING            AGGREGATE             REGISTRATION
           TO BE REGISTERED                REGISTERED       PRICE PER SHARE      OFFERING PRICE              FEE
- --------------------------------------------------------------------------------------------------------------------------
Common Stock, par value $10.00, of
 SPX..................................    18,390,362(1)           N/A           $908,401,685(2)       $267,978.50(2)(3)
- --------------------------------------------------------------------------------------------------------------------------
Rights to Purchase Preferred
  Stock(4)............................     18,390,362             N/A                 N/A                    N/A
- --------------------------------------------------------------------------------------------------------------------------
- --------------------------------------------------------------------------------------------------------------------------
</TABLE>
    
 
   
(1) Represents the sum of 43,549,020 shares of common stock of General Signal
    (the "General Signal Common Stock") outstanding on August 28, 1998
    (exclusive of restricted shares to be exchanged for a cash payment by
    General Signal immediately prior to the Merger), plus 384,000 shares of
    General Signal Common Stock (representing a portion of General Signal's
    stock options exercisable and restricted shares vesting prior to the
    effective time of the Merger), multiplied by the exchange ratio of 0.4186.
    
   
(2) Pursuant to Rules 457(f)(1) and (3) and 457(c) of the Securities Act of
    1933, as amended, and solely for purposes of calculating the registration
    fee, the registration fee was computed on the basis of the average of the
    high and low prices of General Signal Common Stock as reported on the New
    York Stock Exchange, Inc. Composite Tape on August 5, 1998 (with respect to
    18,227,270 shares) and August 31, 1998 (with respect to 163,092 shares), in
    each case, less the amount of cash to be paid by SPX in connection with the
    Merger.
    
   
(3) Of this amount, $265,737.24 was paid on August 6, 1998 and $2,241.26 is
    being paid herewith.
    
   
(4) Associated with the Common Stock of SPX are rights to purchase Series A
    Junior Participating Preferred Stock of SPX that will not be exercisable or
    evidenced separately from the Common Stock of SPX prior to the occurrence of
    certain events.
    
 
    THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(A) OF
THE SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(A),
MAY DETERMINE.
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>   2
 
[SPX CORP. LOGO]
   
                              700 Terrace Point Drive         Phone 616-724-5000
                           
                           
                              P.O. Box 3301        Fax 616-724-5720
                           
                           
                              Muskegon, MI 49443-3301
                           
                           
                           
                              September 3, 1998
                             
 
Fellow Stockholders:
 
   
     You are cordially invited to attend a Special Meeting of Stockholders of
SPX Corporation on Monday, October 5, 1998, at 10:00 a.m. (Eastern Time), at the
offices of Fried, Frank, Harris, Shriver & Jacobson, One New York Plaza, 27th
Floor, New York, New York.
    
 
     On July 19, 1998, SPX and General Signal Corporation entered into an
Agreement and Plan of Merger providing for SPX to acquire General Signal. The
acquisition will be accomplished by the merger of General Signal into a wholly
owned subsidiary of SPX. In the Merger, stockholders of General Signal will
receive, for each of their General Signal shares, at their election, either (i)
0.6977 of a share of SPX Common Stock or (ii) $45.00 in cash, without interest,
or (iii) 0.4186 of a share of SPX Common Stock and $18.00 in cash, without
interest, subject to proration to ensure that 60% of the outstanding General
Signal shares are exchanged for SPX Common Stock and 40% of the outstanding
General Signal shares are exchanged for cash. Immediately after the Merger,
stockholders of General Signal will own approximately 60% and stockholders of
SPX will own approximately 40% of SPX.
 
   
     At the Special Meeting, you and the other stockholders of SPX are being
asked to vote on the approval of the issuance by SPX of shares of its Common
Stock in the Merger. In addition, you and other stockholders are being asked to
approve the amendment of SPX's 1992 Stock Compensation Plan to increase the
number of shares of SPX Common Stock that may be issued under this plan.
Approval of each of the proposals requires the affirmative vote of the holders
of a majority of the votes cast at the Special Meeting. THE SPX BOARD OF
DIRECTORS RECOMMENDS THAT YOU VOTE "FOR" EACH OF THE PROPOSALS.
    
 
     I am pleased you have chosen to invest in SPX Corporation. I urge you to
vote, sign and date the enclosed proxy card and return it in the enclosed
business reply envelope, even if you plan to attend the Special Meeting. No
postage is required if mailed in the United States. Your vote is important, and
voting by proxy will ensure your representation at the Special Meeting even if
you cannot attend in person.
 
     The Merger, the Merger Agreement and the proposal you are voting on are
more fully described in the accompanying Joint Proxy Statement/Prospectus, which
you should read carefully. If you have any questions or require additional
information about the Special Meeting or the Merger, please call D.F. King &
Co., Inc., our proxy solicitor/information agent, at (800) 628-8510.
 
                                          Sincerely,
 
                                          /s/ JOHN B. BLYSTONE
                                          John B. Blystone
                                          Chairman, President and
                                          Chief Executive Officer
<PAGE>   3
 
                                [SPX Corp LOGO]
 
   
                   NOTICE OF SPECIAL MEETING OF STOCKHOLDERS
    
   
                         TO BE HELD ON OCTOBER 5, 1998
    
 
To the Stockholders of
SPX Corporation:
 
   
     Notice is hereby given that a special meeting of stockholders (the "Special
Meeting") of SPX Corporation, a Delaware corporation ("SPX"), will be held on
Monday, October 5, 1998, at 10:00 a.m. (Eastern Time), at the offices of Fried,
Frank, Harris, Shriver & Jacobson, One New York Plaza, 27th Floor, New York, New
York, to consider and vote upon the following:
    
 
   
          1. To approve the issuance of shares of common stock, par value $10.00
     per share, of SPX (the "SPX Common Stock") in the merger (the "Merger") of
     General Signal Corporation ("General Signal") with and into SAC Corp., a
     wholly owned subsidiary of SPX ("MergerSub"), in accordance with the
     Agreement and Plan of Merger, dated as of July 19, 1998 (the "Merger
     Agreement"), among SPX, MergerSub and General Signal (the "SPX Proposal");
     and
    
 
   
          2. To approve an amendment of SPX's 1992 Stock Compensation Plan to
     increase the number of shares of SPX Common Stock available for issuance
     thereunder by 1.1 million to 3.0 million (the "SPX Plan Amendment
     Proposal").
    
 
   
     Stockholders of SPX of record at the close of business on August 28, 1998
are entitled to notice of, and to vote at, the Special Meeting and at any and
all adjournments or postponements thereof. Reference is made to the attached
Joint Proxy Statement/Prospectus for a more complete description of the Merger
Agreement and the transactions contemplated thereby, including the Merger, and
of the SPX Plan Amendment Proposal. A complete list of the holders of record of
SPX Common Stock entitled to vote at the Special Meeting will be open to
examination, during ordinary business hours, at SPX's corporate headquarters,
for the ten days preceding the Special Meeting, and at the Special Meeting, by
any stockholder for any purpose germane to the Special Meeting.
    
 
     It is important that your shares of SPX Common Stock be represented at the
Special Meeting, regardless of the number of shares you hold. You are urged to
specify your voting preference by completing, dating and signing the enclosed
proxy card and returning it in the enclosed business reply envelope. No postage
is required if mailed in the United States. If you wish to vote in accordance
with the recommendation of the Board of Directors of SPX, all you need to do is
date and sign the proxy card and return it in the enclosed envelope. If you
receive more than one form of proxy, it is an indication that your shares are
registered in more than one account. All proxy forms received by you should be
signed and returned promptly to ensure that all of your shares are voted.
 
   
     If your shares are not registered in your own name and you plan to attend
the Special Meeting and vote your shares in person, you will need to ask the
broker, trust company, bank or other nominee that holds your shares to provide
you with evidence of your share ownership on August 28, 1998 and bring that
evidence to the Special Meeting. Please complete, sign and return your proxy
card whether or not you plan to attend the Special Meeting.
    
 
                                      By order of the Board of Directors,
 
                                      /s/ CHRISTOPHER J. KEARNEY
                                      Christopher J. Kearney
                                      Vice President, Secretary and General
                                      Counsel
 
   
September 3, 1998
    
 
   
     YOUR BOARD OF DIRECTORS RECOMMENDS THAT YOU VOTE TO APPROVE THE SPX
PROPOSAL AND THE SPX PLAN AMENDMENT PROPOSAL, EACH OF WHICH IS DESCRIBED IN
DETAIL IN THE ACCOMPANYING JOINT PROXY STATEMENT/PROSPECTUS. YOUR VOTE IS
IMPORTANT. THE AFFIRMATIVE VOTE OF THE HOLDERS OF A MAJORITY OF THE VOTES CAST
AT THE SPECIAL MEETING IS REQUIRED TO APPROVE THE SPX PROPOSAL AND THE SPX PLAN
AMENDMENT PROPOSAL. YOU ARE URGED TO COMPLETE, SIGN AND DATE THE ENCLOSED PROXY
CARD AND RETURN IT IN THE ENCLOSED POSTAGE-PAID ENVELOPE, WHETHER OR NOT YOU
PLAN TO ATTEND THE SPECIAL MEETING. IF YOU ATTEND THE SPECIAL MEETING, YOU MAY,
IF YOU WISH, REVOKE ANY PREVIOUSLY SUBMITTED PROXY CARD AND VOTE IN PERSON.
    
<PAGE>   4
 
   
                              GENERAL SIGNAL LOGO
    
 
   
                                                  September 3, 1998
    
 
Dear Stockholder:
 
   
     You are cordially invited to attend a Special Meeting of Stockholders of
General Signal Corporation to be held on Monday, October 5, 1998, at 10:00 a.m.
(Eastern Time), at General Signal's headquarters, One High Ridge Park, Stamford,
Connecticut.
    
 
     At the Special Meeting, you will be asked to consider and vote upon the
proposed merger of General Signal into a subsidiary of SPX Corporation pursuant
to a Merger Agreement that General Signal entered into on July 19, 1998. SPX is
a diversified servicer and manufacturer of tools, equipment and components for
the global motor vehicle industry, and has an excellent record of enhancing
stockholder value in recent years.
 
     In the Merger, each of your shares of General Signal Common Stock will be
exchanged for, at your election, either (1) 0.6977 of a share of SPX Common
Stock or (2) $45.00 in cash, without interest, or (3) 0.4186 of a share of SPX
Common Stock and $18.00 in cash, without interest, and subject to proration to
ensure that 60% of the outstanding General Signal shares are exchanged for SPX
Common Stock and 40% of the outstanding General Signal shares are exchanged for
cash. Immediately after the Merger, stockholders of General Signal will own
approximately 60% and stockholders of SPX will own approximately 40% of SPX.
 
   
     After careful consideration, the Board of Directors has unanimously
determined that the Merger is advisable and fair to, and in the best interests
of, General Signal and its stockholders. ACCORDINGLY, THE BOARD HAS APPROVED THE
MERGER AGREEMENT AND UNANIMOUSLY RECOMMENDS THAT STOCKHOLDERS OF GENERAL SIGNAL
VOTE "FOR" ITS APPROVAL AND ADOPTION AT THE SPECIAL MEETING.
    
 
     Enclosed is a Joint Proxy Statement/Prospectus which contains historical
and pro forma financial information concerning General Signal and SPX, a
detailed description of the Merger and the background of the transaction, and a
complete copy of the Merger Agreement. I urge you to review these materials
carefully.
 
   
     Because of the significance of the proposed Merger to the future of General
Signal, your participation in the Special Meeting, in person or by proxy, is
especially important. IF YOU ABSTAIN OR FAIL TO VOTE AT THE SPECIAL MEETING, IT
WILL HAVE THE SAME EFFECT AS A VOTE "AGAINST" THE MERGER. ACCORDINGLY, PLEASE
COMPLETE, SIGN AND DATE THE ENCLOSED PROXY CARD PROMPTLY AND MAIL IT IN THE
POSTAGE-PAID ENVELOPE SO THAT YOUR SHARES WILL BE REPRESENTED AT THE SPECIAL
MEETING. Returning the proxy card does not deprive you of your right to attend
the meeting and vote your shares in person.
    
 
                                          Sincerely,
 
                                          /s/ MICHAEL D. LOCKHART
                                          Michael D. Lockhart
                                          Chairman, President
                                          and Chief Executive Officer
<PAGE>   5
 
   
                           GENERAL SIGNAL CORPORATION
    
 
                   NOTICE OF SPECIAL MEETING OF STOCKHOLDERS
   
                         TO BE HELD ON OCTOBER 5, 1998
    
 
To the Stockholders of General Signal Corporation:
 
   
     Notice is hereby given that a special meeting of stockholders (the "Special
Meeting") of General Signal Corporation, a New York corporation ("General
Signal"), will be held on Monday, October 5, 1998, at 10:00 a.m. (Eastern Time),
at General Signal's headquarters, One High Ridge Park, Stamford, Connecticut for
the purpose of considering and voting upon approval and adoption of an Agreement
and Plan of Merger, dated as of July 19, 1998 (the "Merger Agreement"), among
SPX Corporation ("SPX"), SAC Corp., a wholly owned subsidiary of SPX
("MergerSub"), and General Signal, pursuant to which General Signal will be
merged with and into MergerSub (the "Merger") and the separate corporate
existence of General Signal will cease.
    
 
     Enclosed with this Notice of Special Meeting is a Joint Proxy
Statement/Prospectus containing a more complete description of the Merger
Agreement and the transactions contemplated thereby, including the Merger.
Stockholders are urged to read the Joint Proxy Statement/Prospectus carefully.
 
   
     Only stockholders of record at the close of business on August 28, 1998 are
entitled to notice of, and to vote at, the Special Meeting and at any and all
adjournments or postponements thereof. The affirmative vote of holders of
two-thirds of the shares of General Signal Common Stock outstanding and entitled
to vote is required for approval and adoption of the Merger Agreement.
    
 
   
     It is important that your shares be represented at the Special Meeting,
regardless of the number of shares you hold. IF YOU ABSTAIN OR FAIL TO VOTE AT
THE SPECIAL MEETING, IT WILL HAVE THE SAME EFFECT AS A VOTE "AGAINST" THE MERGER
AGREEMENT. ACCORDINGLY, YOU ARE URGED TO SPECIFY YOUR VOTING PREFERENCE BY
COMPLETING, DATING AND SIGNING THE ENCLOSED PROXY CARD AND RETURNING IT IN THE
ENCLOSED BUSINESS REPLY ENVELOPE. No postage is required if mailed in the United
States. If you wish to vote in accordance with the recommendation of the General
Signal Board of Directors, all you need to do is date and sign the proxy card
and return it in the enclosed envelope. If you receive more than one form of
proxy, it is an indication that your shares are registered in more than one
account. All proxy forms received by you should be signed and returned promptly
to ensure that all of your shares are voted. Returning the proxy card does not
deprive you of your right to attend the Special Meeting and vote your shares in
person.
    
 
   
     If your shares are not registered in your own name and you plan to attend
the Special Meeting and vote your shares in person, you will need to ask the
broker, trust company, bank or other nominee that holds your shares to provide
you with evidence of your share ownership on August 28, 1998 and bring that
evidence to the Special Meeting.
    
 
     Please complete and return your proxy card whether or not you plan to
attend the Special Meeting.
 
   
     ELECTION OF MERGER CONSIDERATION. Pursuant to the Merger Agreement, each
General Signal stockholder will be entitled to receive, at his or her election
but subject to the limitations and proration procedures set forth in the Merger
Agreement and described in the Joint Proxy Statement/Prospectus, for each share
of common stock of General Signal, either (i) 0.6977 of a share of common stock,
par value $10.00 per share, of SPX ("SPX Common Stock"); or (ii) $45.00 in cash,
without interest; or (iii) 0.4186 of a share of SPX Common Stock and $18.00 in
cash, without interest. A form of election for specifying the form of
consideration you would like to receive in exchange for your shares (the "Form
of Election") will be sent to you shortly in a separate mailing. The Form of
Election includes a letter of transmittal and instructions for transmitting
stock certificates representing your General Signal shares and a return
envelope. Elections may only be made by delivering the Form of Election and
other required material set forth in the Form of Election (as more fully
described in the accompanying Joint Proxy Statement/Prospectus) with receipt by
The Bank of New York, which has been designated as the Exchange Agent, no later
than 5:00 p.m. (Eastern Time) on October 2, 1998, the last business day before
the Special Meeting (the "Election Deadline"). BECAUSE ELECTIONS MUST BE MADE
PRIOR TO THE SPECIAL MEETING, REGARDLESS OF HOW YOU INTEND TO VOTE WITH RESPECT
TO THE MERGER AGREEMENT, YOU ARE URGED TO COMPLETE AND SIGN THE FORM OF ELECTION
AND RETURN
    
<PAGE>   6
 
   
IT AND THE OTHER REQUIRED MATERIAL SET FORTH IN THE FORM OF ELECTION AS PROMPTLY
AS POSSIBLE AND IN ANY EVENT PRIOR TO THE ELECTION DEADLINE.
    
 
                                       By order of the Board of Directors,

                                       /s/ JOANNE L. BOBER
                                       Joanne L. Bober
                                       Senior Vice President,
                                       General Counsel and Secretary
 
   
September 3, 1998
    
 
     YOUR BOARD OF DIRECTORS UNANIMOUSLY RECOMMENDS THAT YOU VOTE TO APPROVE AND
ADOPT THE MERGER AGREEMENT, WHICH IS DESCRIBED IN DETAIL IN THE ACCOMPANYING
JOINT PROXY STATEMENT/PROSPECTUS. YOUR VOTE IS IMPORTANT. THE AFFIRMATIVE VOTE
OF TWO-THIRDS OF THE SHARES OF GENERAL SIGNAL COMMON STOCK OUTSTANDING AND
ENTITLED TO VOTE IS REQUIRED TO APPROVE AND ADOPT THE MERGER AGREEMENT. YOU ARE
URGED TO COMPLETE, SIGN AND DATE THE ENCLOSED PROXY CARD AND RETURN IT IN THE
ENCLOSED POSTAGE-PAID ENVELOPE, WHETHER OR NOT YOU PLAN TO ATTEND THE SPECIAL
MEETING. IF YOU ATTEND THE SPECIAL MEETING, YOU MAY, IF YOU WISH, REVOKE ANY
PREVIOUSLY SUBMITTED PROXY CARD AND VOTE IN PERSON.
<PAGE>   7
   
                                SPX CORPORATION
    
 
                                      AND
 
                           GENERAL SIGNAL CORPORATION
 
                             JOINT PROXY STATEMENT
 
   
                                      FOR
    
 
                        SPECIAL MEETINGS OF STOCKHOLDERS
   
                         TO BE HELD ON OCTOBER 5, 1998
    
                            ------------------------
 
                                SPX CORPORATION
                                   PROSPECTUS
                            ------------------------
 
   
     This Joint Proxy Statement/Prospectus constitutes the proxy statement of
each of SPX Corporation, a Delaware corporation ("SPX"), and General Signal
Corporation, a New York corporation ("General Signal"), relating to the
solicitation of proxies for use at the special meetings of stockholders of each
of SPX and General Signal scheduled to be held on Monday, October 5, 1998, and
at any adjournments or postponements thereof (respectively, the "SPX Special
Meeting" and the "General Signal Special Meeting" and, collectively, the
"Special Meetings"). This Joint Proxy Statement/Prospectus relates to the
Agreement and Plan of Merger, dated as of July 19, 1998 (the "Merger
Agreement"), among SPX, SAC Corp., a Delaware corporation and a wholly owned
subsidiary of SPX ("MergerSub"), and General Signal, pursuant to which General
Signal will merge with and into MergerSub (the "Merger"), with MergerSub
surviving as a wholly owned subsidiary of SPX (that company after the Merger is
sometimes referred to herein as the "Surviving Corporation").
    
 
   
     In the Merger, each General Signal stockholder will be entitled to receive,
at his or her election but subject to the limitations and proration procedures
described in this Joint Proxy Statement/Prospectus and as set forth in the
Merger Agreement, for each share of common stock, par value $1.00 per share, of
General Signal ("General Signal Common Stock") held by such stockholder, EITHER
(i) 0.6977 of a share of common stock, par value $10.00 per share, of SPX ("SPX
Common Stock"); OR (ii) $45.00 in cash, without interest; OR (iii) 0.4186 of a
share of SPX Common Stock and $18.00 in cash, without interest (the "Merger
Consideration"), provided that only 40% of the outstanding shares of General
Signal Common Stock will be exchanged for cash and only 60% of the outstanding
shares of General Signal Common Stock will be exchanged for shares of SPX Common
Stock. Cash will be paid in lieu of any fractional share of SPX Common Stock.
Unless the context otherwise requires, all references to General Signal Common
Stock include the associated General Signal Rights (as hereinafter defined) and
all references to SPX Common Stock include the associated SPX Rights (as
hereinafter defined). The SPX Common Stock and the General Signal Common Stock
are each listed for trading on the New York Stock Exchange, Inc. (the "NYSE")
and the Pacific Exchange, Inc. (the "PE"). The SPX Common Stock is listed under
the symbol "SPW" and the General Signal Common Stock is listed under the symbol
"GSX." On July 17, 1998, the last trading day before public announcement of the
Merger Agreement, the closing price of a share of SPX Common Stock on the NYSE
Composite Tape was $64.50, and the closing price of a share of General Signal
Common Stock on the NYSE Composite Tape was $37.625. On September 2, 1998, the
last trading day before the date of this Joint Proxy Statement/Prospectus, the
closing price of a share of SPX Common Stock on the NYSE Composite Tape was
$48.4375. Stockholders of SPX and General Signal are urged to obtain current
market information with respect to SPX Common Stock and General Signal Common
Stock.
    
                                                   (Continued on following page)
 
   
     This Joint Proxy Statement/Prospectus and the accompanying forms of proxy
are first being mailed to stockholders of each of SPX and General Signal on or
about September 4, 1998.
    
 
   
     SEE "RISK FACTORS" BEGINNING ON PAGE 26 FOR A DISCUSSION OF CERTAIN MATTERS
THAT SHOULD BE CONSIDERED BY STOCKHOLDERS OF EACH OF SPX AND GENERAL SIGNAL IN
CONNECTION WITH THE MERGER.
    
                            ------------------------
 
 THE SECURITIES TO BE ISSUED PURSUANT TO THIS JOINT PROXY STATEMENT/PROSPECTUS
HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND EXCHANGE COMMISSION
     OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES AND EXCHANGE
   COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE ACCURACY OR
  ADEQUACY OF THIS JOINT PROXY STATEMENT/PROSPECTUS. ANY REPRESENTATION TO THE
                        CONTRARY IS A CRIMINAL OFFENSE.
                            ------------------------
 
   
    The date of this Joint Proxy Statement/Prospectus is September 3, 1998.
    
<PAGE>   8
 
(Continued from previous page)
 
   
     As a result of and immediately following the Merger, the General Signal
stockholders immediately prior to the Merger will hold approximately 60%, and
the SPX stockholders immediately prior to the Merger will hold approximately
40%, of the shares of SPX Common Stock outstanding immediately following the
Merger. The shares of SPX Common Stock to be issued in the Merger will be
authorized for listing, subject to official notice of issuance, on the NYSE and
the PE.
    
 
   
     A form of election and letter of transmittal, with instructions
(collectively, the "Form of Election"), for making an election with respect to
the type of consideration to be received in the Merger (an "Election") and
transmitting stock certificates representing shares of General Signal Common
Stock ("Stock Certificates") together with a return envelope, will shortly be
sent to General Signal stockholders who are stockholders of record as of August
28, 1998. Persons who become stockholders of record after that date may obtain a
Form of Election from D.F. King & Co., Inc., which has been designated as the
Information Agent (the "Information Agent"), by calling (800) 628-8510 or from
The Bank of New York, which has been designated as the Exchange Agent (the
"Exchange Agent"), by calling (800) 507-9357. GENERAL SIGNAL STOCKHOLDERS ARE
URGED TO COMPLETE AND SIGN THE FORM OF ELECTION AND RETURN IT AND THE OTHER
REQUIRED MATERIAL SET FORTH IN THE FORM OF ELECTION WITH RECEIPT BY THE EXCHANGE
AGENT NO LATER THAN 5:00 P.M. (EASTERN TIME) ON OCTOBER 2, 1998 (THE "ELECTION
DEADLINE"). General Signal stockholders who fail to return a Form of Election
and the other required material prior to the Election Deadline will not be
entitled to elect from among the alternative forms of Merger Consideration and
will receive cash, SPX Common Stock, or a combination of cash and SPX Common
Stock as determined in accordance with the Merger Agreement. See "The Merger
Agreement -- Elections." A copy of the Merger Agreement is attached hereto as
Appendix A.
    
 
   
     The consummation of the Merger is subject to (i) the approval of the
issuance by SPX of shares of SPX Common Stock in the Merger in accordance with
the terms of the Merger Agreement (the "SPX Proposal") by the affirmative vote
of the holders of a majority of the votes cast at the SPX Special Meeting; (ii)
the approval and adoption of the Merger Agreement (the "General Signal
Proposal") by the affirmative vote of the holders of two-thirds of the
outstanding shares of General Signal Common Stock; and (iii) certain other
conditions. See "The Merger Agreement -- Conditions." At the SPX Special
Meeting, stockholders of SPX will also be asked to approve an amendment of SPX's
1992 Stock Compensation Plan (as amended and restated, the "1992 Plan") to
increase the shares of SPX Common Stock available for issuance thereunder by 1.1
million to 3.0 million (the "SPX Plan Amendment Proposal"). See "Amendment of
the SPX Corporation 1992 Stock Compensation Plan."
    
 
   
     This Joint Proxy Statement/Prospectus also constitutes the prospectus of
SPX with respect to the SPX Common Stock to be issued to the General Signal
stockholders in the Merger. A registration statement on Form S-4 (the
"Registration Statement") has been filed by SPX with the Securities and Exchange
Commission (the "Commission") under the Securities Act of 1933, as amended (the
"Securities Act"), with respect to these shares of SPX Common Stock. Based on
the 43,549,020 shares of General Signal Common Stock outstanding as of August
28, 1998 (exclusive of Restricted Shares (as defined herein), which will be
canceled in exchange for a cash payment of $45.00 per share immediately prior to
the Merger) and the exchange ratio of 0.4186 (or 60% of 0.6977) pursuant to the
Merger Agreement, SPX will issue approximately 18,229,620 shares of SPX Common
Stock in the aggregate to the General Signal stockholders in the Merger.
    
 
     NO PERSON HAS BEEN AUTHORIZED TO GIVE ANY INFORMATION OR TO MAKE ANY
REPRESENTATION OTHER THAN THOSE CONTAINED IN THIS JOINT PROXY
STATEMENT/PROSPECTUS IN CONNECTION WITH THE SOLICITATION OF PROXIES OR THE
OFFERING OF SECURITIES MADE BY THIS JOINT PROXY STATEMENT/PROSPECTUS AND, IF
GIVEN OR MADE, SUCH INFORMATION OR REPRESENTATIONS MUST NOT BE RELIED UPON AS
HAVING BEEN AUTHORIZED BY SPX OR GENERAL SIGNAL. NEITHER THE DELIVERY OF THIS
JOINT PROXY STATEMENT/PROSPECTUS NOR ANY DISTRIBUTION OF SECURITIES MADE
HEREUNDER SHALL, UNDER ANY CIRCUMSTANCE, CREATE ANY IMPLICATION THAT THERE HAS
BEEN NO CHANGE IN THE INFORMATION SET FORTH HEREIN SINCE THE DATE OF THIS JOINT
PROXY STATEMENT/PROSPECTUS. THIS JOINT PROXY STATEMENT/PROSPECTUS DOES NOT
CONSTITUTE AN OFFER TO SELL, OR A SOLICITATION OF AN OFFER TO BUY, ANY
SECURITIES, OR THE SOLICITATION OF A PROXY, BY ANYONE IN ANY JURISDICTION IN
WHICH SUCH OFFER OR SOLICITATION IS NOT AUTHORIZED OR IN WHICH THE PERSON MAKING
SUCH OFFER OR SOLICITATION IS NOT QUALIFIED TO DO SO OR TO ANYONE TO WHOM IT IS
UNLAWFUL TO MAKE SUCH SOLICITATION.
<PAGE>   9
 
                               TABLE OF CONTENTS
 
   
<TABLE>
<S>                                                           <C>
AVAILABLE INFORMATION.......................................    1
INCORPORATION OF DOCUMENTS BY REFERENCE.....................    1
CAUTIONARY STATEMENT CONCERNING FORWARD-LOOKING
  STATEMENTS................................................    2
SUMMARY.....................................................    3
  The Companies.............................................    3
  Special Meetings..........................................    4
     Date, Time and Place...................................    4
     Purpose of the Special Meetings........................    4
     Record Dates; Shares Entitled to Vote..................    4
     Quorum; Vote Required..................................    4
     Security Ownership of Management.......................    5
  The Merger and the Merger Agreement.......................    5
     General................................................    5
     Treatment of General Signal Options and Restricted
      Stock.................................................    5
     Reasons for the Merger; Recommendations of the
      Boards................................................    6
     Opinion of SPX's Financial Advisor.....................    6
     Opinion of General Signal's Investment Banker..........    6
     Accounting Treatment...................................    6
     Federal Income Tax Consequences........................    7
     Governance Following the Merger........................    7
     Interests of Certain Persons in the Merger.............    7
     Conditions; Effective Time of the Merger...............    7
     Form of Merger Consideration; Election Procedures......    8
     No Dissenters' Rights..................................    9
     No Solicitation........................................   10
     Termination of the Merger Agreement....................   10
     Termination Fee; Reimbursement of Expenses.............   10
     Regulatory Approval....................................   11
     Comparative Stockholder Rights.........................   11
     Merger Financing.......................................   11
     Risk Factors...........................................   11
  Market Price and Dividend Information.....................   12
  Comparative Per Share Data................................   13
  Selected Historical Consolidated Financial Data of SPX....   14
  Selected Historical Consolidated Financial Data of General
     Signal.................................................   19
  Summary Selected Pro Forma Condensed Combined Financial
     Data of SPX and General Signal.........................   23
RISK FACTORS................................................   26
  Fixed Exchange Ratio Despite Change in Relative Stock
     Prices.................................................   26
  Federal Income Tax Consequences...........................   26
  Leverage..................................................   27
  Uncertainties in Integrating Business Operations and
     Achieving Cost Savings; Potential Charges to
     Earnings...............................................   27
  Dependence on Key Personnel...............................   28
  Reliance on Major Customers of SPX........................   28
  Cyclical Nature of Automotive Industry....................   28
  Significance of Goodwill..................................   28
  Equity Dilution of Current SPX Stockholders...............   29
</TABLE>
    
 
                                        i
<PAGE>   10
 
   
<TABLE>
<S>                                                                        <C>
  Absence of Dividends..................................................    29
  Year 2000 Costs.......................................................    29
  Environmental Liabilities.............................................    30
  Anti-Takeover Effects of Certain Charter,                             
    By-Law and Statutory Provisions.....................................    31
THE SPECIAL MEETINGS....................................................    32
  General...............................................................    32
  Record Date; Quorum and Required Vote.................................    32
  Proxies...............................................................    33
  General Signal Confidential Voting Policy.............................    34
  Solicitation of Proxies...............................................    34
  No Dissenters' Rights.................................................    34
THE COMPANIES...........................................................    35
THE MERGER..............................................................    36
  General...............................................................    36
  Background of the Merger..............................................    36
  Reasons for the Merger; Recommendations of the Boards.................    37
  Opinion of SPX's Financial Advisor....................................    40
  Opinion of General Signal's Investment Banker.........................    45
  Accounting Treatment..................................................    49
  Board and Management Following the Merger.............................    49
  Regulatory Approvals..................................................    50
  Interests of Certain Persons in the Merger............................    50
  No Dissenters' Rights.................................................    52
  Stock Exchange Listings...............................................    52
  Delisting and Deregistration of the General Signal Common Stock.......    52
  Treatment of General Signal Stock Certificates........................    52
  Amendment of General Signal Rights Agreement..........................    53
  Merger Financing......................................................    53
THE MERGER AGREEMENT....................................................    54
  The Merger............................................................    54
  Conversion of Securities..............................................    54
  Elections.............................................................    54
  Election Procedure....................................................    56
  Payment of Merger Consideration; Exchange of Certificates.............    57
  Corporate Organization and Governance.................................    59
  Representations and Warranties........................................    59
  Certain Covenants.....................................................    59
  Conditions............................................................    63
  Termination...........................................................    63
  Termination Fee; Reimbursement of Expenses............................    64
  Expenses..............................................................    64
CERTAIN FEDERAL INCOME TAX CONSEQUENCES OF THE MERGER...................    65
  Only Shares of SPX Common Stock Received..............................    65
  Only Cash Received....................................................    65
  Shares of SPX Common Stock and Cash Received..........................    66
  Fractional Shares.....................................................    68
AMENDMENT OF THE SPX CORPORATION 1992 STOCK COMPENSATION PLAN...........    68
  General...............................................................    68
  SPX Plan Amendment Proposal...........................................    68
</TABLE>
    
 
                                       ii
<PAGE>   11
 
   
<TABLE>
<S>                                                                          <C>
  The 1992 Plan..........................................................    69
COMPARISON OF RIGHTS OF STOCKHOLDERS OF SPX AND GENERAL SIGNAL...........    73
  Special Meetings of Stockholders.......................................    73
  Number of Directors....................................................    74
  Classification of Directors............................................    74
  Removal of Directors...................................................    74
  Filling Vacancies on the Board of Directors............................    75
  Preemptive Rights......................................................    75
  Corporate Action Without a Stockholders' Meeting.......................    75
  Dividends..............................................................    75
  Amendment of Certificate of Incorporation..............................    76
  Amendment of By-Laws...................................................    76
  Stockholder Proposal Procedures........................................    76
  Advance Notice of Stockholder Nominations of Directors.................    77
  Indemnification........................................................    78
  Limitation of Liability................................................    79
  Business Combinations with Substantial Stockholders....................    79
  Business Combination Statutes..........................................    81
  Stockholder Rights Plan................................................    82
  Consideration of Non-Stockholder Constituencies........................    83
MARKET PRICE AND DIVIDEND INFORMATION....................................    84
BENEFICIAL OWNERSHIP OF SPX COMMON STOCK.................................    85
BENEFICIAL OWNERSHIP OF GENERAL SIGNAL COMMON STOCK......................    86
SELECTED HISTORICAL CONSOLIDATED FINANCIAL DATA OF SPX...................    88
SELECTED HISTORICAL CONSOLIDATED FINANCIAL DATA OF GENERAL SIGNAL........    93
PRO FORMA CONDENSED COMBINED FINANCIAL DATA OF SPX AND GENERAL SIGNAL....    97
PRO FORMA ADJUSTED HISTORICAL FINANCIAL DATA OF SPX......................   106
PRO FORMA ADJUSTED HISTORICAL FINANCIAL DATA OF GENERAL SIGNAL...........   108
EXPERTS..................................................................   110
LEGAL MATTERS............................................................   110
STOCKHOLDER PROPOSALS....................................................   110
</TABLE>
    
 
APPENDICES:
 
A -- Merger Agreement
 
B -- Opinion of Stern Stewart & Co.
 
   
C -- Opinion of Lazard Freres & Co. LLC
    
 
   
D -- SPX Corporation 1992 Stock Compensation Plan (as amended through August 26,
1998)
    
 
                                       iii
<PAGE>   12
 
                             AVAILABLE INFORMATION
 
     SPX and General Signal are subject to the informational requirements of the
Securities Exchange Act of 1934, as amended (the "Exchange Act"), and, in
accordance therewith, file reports, proxy statements and other information with
the Commission. The reports, proxy statements and other information filed by SPX
or General Signal with the Commission may be inspected and copied at the
Commission's public reference room located at Judiciary Plaza, 450 Fifth Street,
N.W., Room 1024, Washington, D.C. 20549, and at the public reference facilities
in the Commission's regional offices located at 7 World Trade Center, 13th
Floor, New York, New York 10048, and 500 West Madison Street, Suite 400,
Chicago, Illinois 60661. Copies of such material may be obtained at prescribed
rates by writing to the Commission, Public Reference Section, 450 Fifth Street,
N.W., Washington, D.C. 20549. SPX and General Signal are electronic filers with
the Commission, which maintains a website containing reports, proxy and other
information statements at the following location: http: //www.sec.gov. The
shares of SPX Common Stock are listed on the NYSE and the PE under the symbol
"SPW." The shares of General Signal Common Stock are listed on the NYSE and the
PE under the symbol "GSX." The periodic reports, proxy statements and other
information filed by SPX and General Signal with the Commission may be inspected
at the offices of the NYSE, 20 Broad Street, New York, New York 10005, and at
the offices of the PE at 301 Pine Street, San Francisco, California 94104.
 
     This Joint Proxy Statement/Prospectus does not contain all of the
information set forth in the Registration Statement filed with the Commission by
SPX, certain parts of which are omitted in accordance with the rules and
regulations of the Commission. Reference is hereby made to the Registration
Statement and the exhibits thereto for further information. Exhibits to the
Registration Statement that are omitted from this Joint Proxy
Statement/Prospectus may also be obtained at the Commission's World Wide Web
site described above. Statements contained or incorporated by reference herein
concerning the provisions of any agreement or other document filed as an exhibit
to the Registration Statement or otherwise filed with the Commission are not
necessarily complete, and readers are referred to the copy so filed for more
detailed information, each such statement being qualified in its entirety by
such reference.
 
     Each of SPX and General Signal has supplied all information contained or
incorporated by reference in this Joint Proxy Statement/Prospectus relating to
SPX and General Signal, respectively, and SPX has supplied all information
contained in this Joint Proxy Statement/Prospectus relating to MergerSub.
 
   
     THIS JOINT PROXY STATEMENT/PROSPECTUS INCORPORATES BY REFERENCE DOCUMENTS
THAT ARE NOT PRESENTED HEREIN OR DELIVERED HEREWITH. COPIES OF SUCH DOCUMENTS
(OTHER THAN EXHIBITS THERETO WHICH ARE NOT SPECIFICALLY INCORPORATED BY
REFERENCE HEREIN) ARE AVAILABLE, WITHOUT CHARGE, TO ANY PERSON, INCLUDING ANY
BENEFICIAL OWNER OF SHARES OF SPX COMMON STOCK OR GENERAL SIGNAL COMMON STOCK TO
WHOM THIS JOINT PROXY STATEMENT/PROSPECTUS IS BEING SENT, UPON WRITTEN OR ORAL
REQUEST TO, IN THE CASE OF DOCUMENTS RELATING TO SPX, CHRISTOPHER J. KEARNEY,
VICE PRESIDENT, SECRETARY AND GENERAL COUNSEL, 700 TERRACE POINT DRIVE,
MUSKEGON, MICHIGAN 49443, TELEPHONE (616) 724-5000, AND, IN THE CASE OF
DOCUMENTS RELATING TO GENERAL SIGNAL, JOANNE L. BOBER, SENIOR VICE PRESIDENT,
GENERAL COUNSEL AND SECRETARY, P.O. BOX 10010, ONE HIGH RIDGE PARK, STAMFORD,
CONNECTICUT 06904, TELEPHONE (203) 329-4100. IN ORDER TO ENSURE TIMELY DELIVERY
OF SUCH DOCUMENTS, ANY REQUEST SHOULD BE MADE NO LATER THAN FIVE BUSINESS DAYS
PRIOR TO THE DATE OF THE APPROPRIATE SPECIAL MEETING.
    
 
                    INCORPORATION OF DOCUMENTS BY REFERENCE
 
     The following documents previously filed with the Commission pursuant to
the Exchange Act are incorporated herein by reference and shall be deemed a part
hereof:
 
SPX COMMISSION FILINGS (FILE NO. 1-06948)
 
     1. Annual Report on Form 10-K for the fiscal year ended December 31, 1997
        ("SPX's 1997 Form 10-K");
 
     2. Quarterly Reports on Form 10-Q for the quarters ended March 31, 1998 and
        June 30, 1998 (the latter, "SPX's Second Quarter Form 10-Q");
 
   
     3. Current Reports on Form 8-K dated July 20, 1998 and August 14, 1998;
    
 
     4. Definitive Proxy Statement on Schedule 14A dated April 24, 1998; and
 
                                        1
<PAGE>   13
 
     5. The description of SPX's capital stock (and the SPX Rights) contained in
        SPX's Registration Statements pursuant to Section 12 of the Exchange Act
        and any amendments or reports filed for the purpose of updating any such
        descriptions.
 
GENERAL SIGNAL COMMISSION FILINGS (FILE NO. 1-00996)
 
     1. Annual Report on Form 10-K for the fiscal year ended December 31, 1997
        ("General Signal's 1997 Form 10-K");
 
     2. Quarterly Reports on Form 10-Q for the quarters ended March 31, 1998 and
        June 30, 1998 (the latter, "General Signal's Second Quarter Form 10-Q");
 
     3. Current Report on Form 8-K dated July 23, 1998;
 
     4. Registration Statement on Form 8-A/A, Amendment No. 1 dated July 23,
        1998; and
 
     5. Definitive Proxy Statement on Schedule 14A dated March 23, 1998.
 
     All reports and other documents filed by either SPX or General Signal
pursuant to Section 13(a), 13(c), 14 or 15(d) of the Exchange Act subsequent to
the date of this Joint Proxy Statement/Prospectus and prior to the date of the
Special Meetings shall be deemed to be incorporated by reference herein and to
be a part hereof from the dates of filing of such reports and documents. Any
statement contained in a document incorporated or deemed to be incorporated by
reference herein shall be deemed to be modified or superseded for purposes of
this Joint Proxy Statement/Prospectus to the extent that a statement contained
herein, or in any other subsequently filed document that also is incorporated or
deemed to be incorporated by reference herein, modifies or supersedes the
earlier statement. Any statement so modified shall not be deemed, except as so
modified, to constitute a part of this Joint Proxy Statement/Prospectus, and any
statement so superseded shall not be deemed to constitute a part of this Joint
Proxy Statement/Prospectus.
 
           CAUTIONARY STATEMENT CONCERNING FORWARD-LOOKING STATEMENTS
 
   
     This Joint Proxy Statement/Prospectus contains or incorporates by reference
forward-looking statements, including information concerning possible or assumed
future results of operations of SPX and General Signal, that are subject to
risks and uncertainties. Such forward-looking statements are necessarily
dependent upon assumptions, estimates and dates that may be incorrect or
imprecise and involve known and unknown risks, uncertainties and other factors,
including those set forth under "Risk Factors," "The Merger -- Background of the
Merger," "The Merger -- Reasons for the Merger; Recommendations of the Boards,"
"The Merger -- Opinion of SPX's Financial Advisor" and "The Merger -- Opinion of
General Signal's Investment Banker," and those preceded by, followed by or that
include the words "believes," "expects," "anticipates" or similar expressions.
The following important factors, in addition to those discussed elsewhere in
this Joint Proxy Statement/Prospectus and in the documents which are
incorporated herein by reference, could affect the future results of the
industries in which SPX and General Signal operate in general, and SPX and/or
General Signal in particular, and could cause future results to differ
materially from those expressed in the forward-looking statements contained in
this Joint Proxy Statement/Prospectus: the speed of integration of General
Signal's and SPX's businesses; continued competitive pressures; success of
current operating plans, research and development efforts and strategic
initiatives; the effect of existing and future regulatory actions; changes in
prevailing interest rates and the availability of and terms of financing to fund
the anticipated growth of SPX's business; inflation; changes in costs of goods
and services; economic conditions in general and in SPX's and General Signal's
specific market areas; changes in federal, state, local or foreign government
regulation; liability and other claims asserted against SPX or General Signal;
changes in operating strategy or development plans; the ability to attract and
retain qualified personnel; potential labor disturbances; changes in acquisition
and capital expenditure plans; and other factors referenced herein, or a
significant delay in the expected closing of the Merger.
    
 
                                        2
<PAGE>   14
 
                                    SUMMARY
 
     The following is a summary of certain information contained elsewhere in
this Joint Proxy Statement/ Prospectus. Reference is made to, and this summary
is qualified in its entirety by, the more detailed information contained
elsewhere or incorporated by reference in this Joint Proxy Statement/Prospectus
and in the appendices hereto including, but not limited to, the Merger Agreement
set forth as Appendix A hereto. Unless otherwise defined, capitalized terms used
in this summary have the respective meanings ascribed to them elsewhere in this
Joint Proxy Statement/Prospectus. Stockholders of SPX and General Signal are
urged to read carefully this Joint Proxy Statement/Prospectus and the appendices
hereto, and the documents incorporated by reference herein, in their entirety.
 
                                 THE COMPANIES
 
     SPX. SPX is a global provider of Vehicle Service Solutions to franchised
dealers of motor vehicle manufacturers and independent service locations,
Service Support to vehicle manufacturers, and Vehicle Components to the
worldwide motor vehicle industry.
 
   
     SPX is comprised of two business segments. The Service Solutions segment
includes operations that primarily design, manufacture and market a wide range
of specialty service tools, equipment and services to the global motor vehicle
industry. Major customers are franchised dealers of motor vehicle manufacturers,
aftermarket vehicle service facilities and independent distributors. The Vehicle
Components segment includes operations that primarily design, manufacture and
market transmission and steering components for light- and heavy-duty vehicle
markets, principally in North America and Europe. Major customers of this
segment include vehicle manufacturers, other component manufacturers and the
aftermarket.
    
 
     SPX was organized in 1911 under the laws of Michigan and reincorporated in
Delaware in 1968. SPX was known as The Piston Ring Company until 1931, when it
changed its name to Sealed Power Corporation. In 1988, it changed its name again
to SPX Corporation. Today SPX is a multinational corporation with operations in
14 countries.
 
   
     SPX's corporate headquarters are located at 700 Terrace Point Drive,
Muskegon, Michigan 49443-3301, telephone number (616) 724-5000. Its stock is
traded on the NYSE and the PE under the symbol "SPW."
    
 
   
     General Signal. General Signal, incorporated in New York in 1904, is a
manufacturer of equipment for the Process Controls, Electrical Controls and
Industrial Technology industries. General Signal's key Process Controls industry
products include mixers; valves for municipal water supply and wastewater
treatment and for pulp, paper, food, pharmaceutical and chemical manufacturing;
ultra low-temperature freezers for life science research; and furnaces. For the
Electrical Controls industry, key products include uninterruptible power supply
equipment, power transformers and fire detection systems. Products serving the
Industrial Technology industry include auto and bicycle components, data
networking equipment and fare collection and vending equipment.
    
 
   
     General Signal's principal executive offices are located at One High Ridge
Park, Stamford, Connecticut 06904-2010, telephone number (203) 329-4100. Its
stock is traded on the NYSE and the PE under the symbol "GSX."
    
 
     MergerSub. MergerSub is a wholly owned subsidiary of SPX, incorporated in
Delaware in 1998 for the sole purpose of effecting transactions such as the one
contemplated by the Merger Agreement. MergerSub has no assets or liabilities
other than those arising out of the Merger Agreement. Prior to the consummation
of the Merger, MergerSub will not engage in any activity other than activities
related to the transactions contemplated by the Merger Agreement. MergerSub's
principal executive offices are located at 700 Terrace Point Drive, Muskegon,
Michigan 49443-3301, telephone number (616) 724-5000.
 
                                        3
<PAGE>   15
 
                                SPECIAL MEETINGS
 
DATE, TIME AND PLACE
 
   
     SPX. The SPX Special Meeting will be held on Monday, October 5, 1998, at
10:00 a.m. (Eastern Time), at the offices of Fried, Frank, Harris, Shriver &
Jacobson, One New York Plaza, 27th Floor, New York, New York. See "The Special
Meetings -- General."
    
 
   
     General Signal. The General Signal Special Meeting will be held on Monday,
October 5, 1998, at 10:00 a.m. (Eastern Time), at General Signal's headquarters,
One High Ridge Park, Stamford, Connecticut. See "The Special
Meetings -- General."
    
 
PURPOSE OF THE SPECIAL MEETINGS
 
   
     SPX. The purpose of the SPX Special Meeting is to consider and vote upon
(i) the SPX Proposal, namely, the proposal to approve the issuance of SPX Common
Stock to the General Signal stockholders in the Merger in accordance with the
terms of the Merger Agreement, and (ii) the SPX Plan Amendment Proposal, namely,
the proposal to approve the amendment of the 1992 Plan to increase the number of
shares of SPX Common Stock available for issuance thereunder by 1.1 million to
3.0 million. See "The Special Meetings -- General."
    
 
     General Signal. The purpose of the General Signal Special Meeting is to
consider and vote upon the General Signal Proposal, namely, the proposal to
approve and adopt the Merger Agreement. See "The Special Meetings -- General."
 
RECORD DATES; SHARES ENTITLED TO VOTE
 
   
     SPX. Only holders of record of shares of SPX Common Stock at the close of
business on August 28, 1998 (the "SPX Record Date") are entitled to notice of,
and to vote at, the SPX Special Meeting. As of the SPX Record Date, there were
12,352,077 shares of SPX Common Stock outstanding. Each share of SPX Common
Stock will be entitled to one vote on each matter to be acted upon at the SPX
Special Meeting. See "The Special Meetings -- Record Date; Quorum and Required
Vote."
    
 
   
     General Signal. Only holders of record of shares of General Signal Common
Stock at the close of business on August 28, 1998 (the "General Signal Record
Date") are entitled to notice of, and to vote at, the General Signal Special
Meeting. As of the General Signal Record Date, there were 43,709,142 shares of
General Signal Common Stock outstanding. Each share of General Signal Common
Stock will be entitled to one vote on each matter to be acted upon at the
General Signal Special Meeting. See "The Special Meetings -- Record Date; Quorum
and Required Vote."
    
 
QUORUM; VOTE REQUIRED
 
   
     SPX. Under SPX's By-Laws, the holders of one-third of the shares of SPX
Common Stock outstanding and entitled to vote must be present in person or
represented by proxy at the SPX Special Meeting in order for a quorum to be
present. However, pursuant to the rules of the NYSE, on which the SPX Common
Stock is listed, approval of the SPX Proposal and the SPX Plan Amendment
Proposal will require that the total number of votes cast represent more than
50% of the outstanding shares of SPX Common Stock entitled to vote thereon at
the SPX Special Meeting and that the respective proposals be approved by the
affirmative vote of the holders of a majority of the votes cast at the SPX
Special Meeting. An abstention with respect to the SPX Proposal or the SPX Plan
Amendment Proposal, as the case may be, will have the same effect as a vote cast
against such proposal. Brokers who hold shares of SPX Common Stock as nominees
will not have discretionary authority to vote such shares in the absence of
instructions from the beneficial owners thereof. Broker non-votes or any other
failure to vote (other than an abstention) on the SPX Proposal or the SPX Plan
Amendment Proposal, as the case may be, will have no effect on the outcome of
the vote on such proposal. See "The Special Meetings -- Record Date; Quorum and
Required Vote" and "The Special Meetings -- Proxies."
    
 
                                        4
<PAGE>   16
 
   
     General Signal. The presence in person or by proxy of holders of a majority
of the total number of outstanding shares of General Signal Common Stock will
constitute a quorum for the transaction of business at the General Signal
Special Meeting. The affirmative vote of the holders of two-thirds of all votes
entitled to be cast by the holders of General Signal Common Stock is required to
approve the General Signal Proposal. Brokers who hold shares of General Signal
Common Stock as nominees will not have discretionary authority to vote such
shares in the absence of instructions from the beneficial owners thereof.
Abstentions, broker non-votes or any other failure to vote on the General Signal
Proposal will have the same effect as a vote cast against the General Signal
Proposal. See "The Special Meetings -- Record Date; Quorum and Required Vote"
and "The Special Meetings -- Proxies."
    
 
SECURITY OWNERSHIP OF MANAGEMENT
 
   
     As of the SPX Record Date, the directors and executive officers of SPX and
their affiliates owned an aggregate of approximately 2.9% of the outstanding
shares of SPX Common Stock. As of the General Signal Record Date, the directors
and executive officers of General Signal and their affiliates owned an aggregate
of approximately 0.4% of the outstanding shares of General Signal Common Stock.
Each of the directors and executive officers of SPX and General Signal has
advised the respective companies that he or she plans to vote or to direct the
vote of all shares of SPX Common Stock or General Signal Common Stock, as the
case may be, owned by him or her and entitled to vote in favor of the SPX
Proposal, in the case of SPX, and in favor of the General Signal Proposal, in
the case of General Signal.
    
 
                      THE MERGER AND THE MERGER AGREEMENT
 
GENERAL
 
     The Merger will become effective upon the filing of a certificate of merger
with the Secretary of State of the State of Delaware (the "Delaware Certificate
of Merger") and a certificate of merger with the Department of State of the
State of New York (the "New York Certificate of Merger" and, together with the
Delaware Certificate of Merger, the "Certificates of Merger"). The filing of the
Certificates of Merger will occur as soon as practicable following the
satisfaction (or waiver, where legally permissible) of the conditions set forth
in the Merger Agreement, including receipt of requisite regulatory and
stockholder approvals. See "The Merger Agreement -- Conditions." In the Merger
Agreement and herein, the time at which the Merger becomes effective is called
the "Effective Time."
 
   
     At the Effective Time, General Signal will be merged with and into
MergerSub, with MergerSub surviving the Merger as a wholly owned subsidiary of
SPX. As a result of the Merger, each share of General Signal Common Stock issued
and outstanding immediately prior to the Effective Time will be converted into
the right to receive, at the election of the General Signal stockholder but
subject to the limitations and proration procedures described in this Joint
Proxy Statement/Prospectus and as set forth in the Merger Agreement, EITHER (i)
0.6977 of a share of SPX Common Stock, OR (ii) $45.00 in cash, without interest,
OR (iii) 0.4186 of a share of SPX Common Stock and $18.00 in cash, without
interest. Cash will be paid in lieu of any fractional share of SPX Common Stock.
See "The Merger Agreement -- Conversion of Securities."
    
 
     The shares of SPX Common Stock issued to the General Signal stockholders in
the Merger will constitute approximately 60% of the SPX Common Stock outstanding
immediately following the Merger, and the SPX stockholders immediately prior to
the Merger will hold approximately 40% of the shares of SPX Common Stock
outstanding immediately following the Merger.
 
TREATMENT OF GENERAL SIGNAL OPTIONS AND RESTRICTED STOCK
 
   
     Subject to the consent of each holder thereof where required, immediately
prior to the Effective Time, (i) each outstanding option to purchase shares of
General Signal Common Stock (the "General Signal Options") granted on or prior
to the date of the Merger Agreement pursuant to any of General Signal's stock
option plans, whether or not vested or exercisable, will be canceled and, in
respect thereof, the holder will receive a cash payment from General Signal
equal to the number of shares of General Signal Common Stock
    
 
                                        5
<PAGE>   17
 
   
then subject to the General Signal Option, whether or not vested or exercisable,
multiplied by the excess of $45.00 over the per share exercise price thereof;
and (ii) each outstanding restricted share of General Signal Common Stock
granted on or prior to the date of the Merger Agreement pursuant to any of
General Signal's stock option plans that, but for the effect on such shares of
the General Signal Proposal, would be unvested as of the Effective Time (a
"Restricted Share") will be canceled and, in respect thereof, the holder will
receive a cash payment from General Signal in the amount of $45.00.
    
 
REASONS FOR THE MERGER; RECOMMENDATIONS OF THE BOARDS
 
   
     SPX. THE BOARD OF DIRECTORS OF SPX (THE "SPX BOARD") BELIEVES THAT THE
MERGER AGREEMENT AND THE TRANSACTIONS CONTEMPLATED THEREBY, INCLUDING THE
MERGER, ARE FAIR TO AND IN THE BEST INTERESTS OF SPX AND THE SPX STOCKHOLDERS
AND, ACCORDINGLY, BY UNANIMOUS VOTE OF THOSE PRESENT (ONE DIRECTOR HAVING BEEN
UNABLE TO ATTEND THE BOARD MEETING) APPROVED THE MERGER AGREEMENT AND RESOLVED
TO RECOMMEND THAT THE STOCKHOLDERS OF SPX VOTE "FOR" APPROVAL OF THE SPX
PROPOSAL. For a detailed discussion of the matters and factors considered by the
SPX Board in arriving at its conclusions, see "The Merger -- Background of the
Merger" and "The Merger -- Reasons for the Merger; Recommendations of the
Boards."
    
 
   
     General Signal. THE BOARD OF DIRECTORS OF GENERAL SIGNAL (THE "GENERAL
SIGNAL BOARD") UNANIMOUSLY HAS DETERMINED THAT THE MERGER IS ADVISABLE AND FAIR
TO, AND IN THE BEST INTERESTS OF, GENERAL SIGNAL AND THE GENERAL SIGNAL
STOCKHOLDERS. ACCORDINGLY, THE GENERAL SIGNAL BOARD HAS APPROVED THE MERGER
AGREEMENT AND UNANIMOUSLY RECOMMENDS THAT STOCKHOLDERS OF GENERAL SIGNAL VOTE
"FOR" ITS APPROVAL AND ADOPTION AT THE GENERAL SIGNAL SPECIAL MEETING. For a
detailed discussion of the matters and factors considered by the General Signal
Board in arriving at its conclusions, see "The Merger -- Background of the
Merger" and "The Merger -- Reasons for the Merger; Recommendations of the
Boards."
    
 
OPINION OF SPX'S FINANCIAL ADVISOR
 
     In determining whether to approve the Merger, the SPX Board considered an
opinion from its financial advisor, Stern Stewart & Co. ("Stern Stewart"), as to
the fairness to SPX of the aggregate consideration to be paid by SPX in the
Merger. Stern Stewart is the originator of EVA(R) (a performance measure
calculated as net operating profit after tax minus a charge for the cost of
capital ("EVA")) as a financial management technique and had acted as consultant
to senior management of SPX in introducing and implementing an EVA-based program
at SPX. The Board of Directors of SPX received an oral opinion, subsequently
confirmed in writing (the "Stern Stewart Opinion"), from Stern Stewart to the
effect that, as of the date of such opinion, the aggregate consideration to be
paid by SPX in the Merger was fair to SPX from a financial point of view. The
Stern Stewart Opinion is attached as Appendix B to this Joint Proxy
Statement/Prospectus. Stockholders are encouraged to read the Stern Stewart
Opinion. See "The Merger -- Opinion of SPX's Financial Advisor."
 
OPINION OF GENERAL SIGNAL'S INVESTMENT BANKER
 
   
     In determining whether to approve the Merger, the General Signal Board
considered an opinion from its investment banker, Lazard Freres & Co. LLC
("Lazard Freres"), as to the fairness to the stockholders of General Signal of
the aggregate consideration to be received by them in the Merger. The General
Signal Board received an oral opinion, subsequently confirmed in writing (the
"Lazard Freres Opinion"), from Lazard Freres to the effect that, as of the date
of such opinion, the aggregate consideration to be received by them in the
Merger was fair to the General Signal stockholders from a financial point of
view. The Lazard Freres Opinion is attached as Appendix C to this Joint Proxy
Statement/Prospectus. Stockholders are encouraged to read the Lazard Freres
Opinion. See "The Merger -- Opinion of General Signal's Investment Banker."
    
 
ACCOUNTING TREATMENT
 
     The Merger will be treated as a reverse acquisition for accounting
purposes. See "The Merger -- Accounting Treatment."
 
                                        6
<PAGE>   18
 
FEDERAL INCOME TAX CONSEQUENCES
 
     The parties intend that the Merger be treated for federal income tax
purposes as a reorganization pursuant to Section 368(a) of the Internal Revenue
Code of 1986, as amended (the "Code"), and the obligation of General Signal and
SPX to consummate the Merger is conditioned (which condition SPX and General
Signal have agreed will not be waived) on the receipt of opinions of their
respective legal counsel, in each case dated as of the date the Merger is
consummated, to the effect that the Merger will be treated as such. Assuming
that the Merger constitutes such a reorganization, none of General Signal, SPX,
or MergerSub will recognize any gain or loss as a result of the Merger. In
addition, holders of shares of General Signal Common Stock who exchange their
shares solely for shares of SPX Common Stock will not (other than with respect
to the receipt of cash, if any, in lieu of fractional shares) recognize gain or
loss in the Merger, and holders of shares of General Signal Common Stock who
exchange their shares for cash or for SPX Common Stock and cash will recognize
gain, if any, but not in excess of the amount of cash received, which may or may
not qualify for capital gains treatment. See "Risk Factors" and "Certain Federal
Income Tax Consequences of the Merger."
 
GOVERNANCE FOLLOWING THE MERGER
 
     At the Effective Time, the directors and officers of MergerSub immediately
prior to the Effective Time will become the directors and officers,
respectively, of the Surviving Corporation. See "The Merger -- Board and
Management Following the Merger."
 
     Under the Merger Agreement, the SPX Board is required to take all action
necessary to elect the following persons, who are currently serving on the
General Signal Board, to the SPX Board as of the Effective Time: (i) Emerson U.
Fullwood, who will be assigned to the class of directors whose term of office
expires at SPX's first annual meeting of stockholders after the Effective Time,
and (ii) H. Kent Bowen, who will be assigned to the class of directors whose
term of office expires at SPX's second annual meeting of stockholders after the
Effective Time. See "The Merger -- Board and Management Following the Merger."
 
INTERESTS OF CERTAIN PERSONS IN THE MERGER
 
     In considering the recommendation of the General Signal Board with respect
to the Merger Agreement and the transactions contemplated thereby, the General
Signal stockholders should be aware that certain members of the management of
General Signal and the General Signal Board have certain interests in the Merger
that are in addition to the interests of stockholders of General Signal
generally. See "The Merger -- Interests of Certain Persons in the Merger" and
"The Merger Agreement -- Certain Covenants -- Indemnification and Insurance."
 
CONDITIONS; EFFECTIVE TIME OF THE MERGER
 
   
     The obligations of SPX and General Signal to consummate the Merger are
subject to the satisfaction (or waiver, where legally permissible) of certain
conditions, including, among others, (i) obtaining requisite stockholder
approvals; (ii) the listing on the NYSE, subject only to official notice of
issuance, of the shares of SPX Common Stock to be issued in the Merger; (iii)
the receipt of regulatory approvals required to consummate the transactions
contemplated by the Merger Agreement and the expiration or termination of any
statutory waiting period applicable to the consummation of the Merger; (iv) the
absence of any Law or Decree (each term as defined in the Merger Agreement)
promulgated by any Governmental Authority (as defined in the Merger Agreement)
prohibiting or making illegal consummation of the Merger or the transactions
contemplated by the Merger Agreement; (v) the absence of any breaches of any
representations or warranties made in the Merger Agreement which in the
aggregate have a Material Adverse Effect (as defined in the Merger Agreement) on
General Signal or SPX; and (vi) the receipt of certain legal opinions with
respect to the federal income tax consequences of the Merger. See "The Merger
Agreement -- Conditions" and "Certain Federal Income Tax Consequences of the
Merger."
    
 
     Subject to the satisfaction (or waiver, where legally permissible) of the
conditions to the obligations of SPX and General Signal to consummate the
Merger, it is currently expected that the Merger will be
                                        7
<PAGE>   19
 
consummated immediately following the Special Meetings or as soon thereafter as
all such conditions are satisfied (or waived, where legally permissible).
 
FORM OF MERGER CONSIDERATION; ELECTION PROCEDURES
 
   
     Subject to the limitations and proration procedures set forth below and
elsewhere in this Joint Proxy Statement/Prospectus and in the Merger Agreement,
each holder of shares of General Signal Common Stock immediately prior to the
Effective Time will be entitled to make an Election, i.e. to elect to receive in
respect of each of his or her shares of General Signal Common Stock EITHER (i)
0.6977 of a share of SPX Common Stock (a "Stock Election"), OR (ii) $45.00 in
cash, without interest (a "Cash Election"), OR (iii) 0.4186 of a share of SPX
Common Stock and $18.00 in cash, without interest (a "Mixed Election"), or to
indicate that such holder has no preference as to the receipt of cash, SPX
Common Stock or the combination thereof with respect to his or her shares of
General Signal Common Stock (a "Non-Election").
    
 
   
     ALL ELECTIONS MUST BE MADE ON THE FORM OF ELECTION, WHICH WILL BE SENT
SHORTLY AFTER THE MAILING OF THIS JOINT PROXY STATEMENT/PROSPECTUS TO THE
GENERAL SIGNAL STOCKHOLDERS WHO ARE STOCKHOLDERS OF RECORD AS OF THE GENERAL
SIGNAL RECORD DATE. PERSONS WHO BECOME GENERAL SIGNAL STOCKHOLDERS AFTER THAT
DATE OR WHO OTHERWISE NEED COPIES OF THE FORM OF ELECTION MAY OBTAIN A FORM OF
ELECTION FROM THE INFORMATION AGENT BY CALLING (800) 628-8510 OR FROM THE
EXCHANGE AGENT BY CALLING (800) 507-9357. Non-Elections may be made on the Form
of Election. In addition, a General Signal stockholder will be deemed to have
made a Non-Election if the Form of Election and other documents are not timely
returned or properly completed. See "The Merger Agreement -- Elections." Holders
of record of shares of General Signal Common Stock who hold their shares of
General Signal Common Stock in a representative capacity may submit multiple
Forms of Election, provided that such representative certifies that each such
Form of Election covers all shares of General Signal Common Stock held by such
representative for a particular beneficial owner.
    
 
   
     IN ORDER TO MAKE AN ELECTION WITH RESPECT TO THE FORM OF MERGER
CONSIDERATION TO BE RECEIVED IN THE MERGER, A HOLDER OF RECORD OF SHARES OF
GENERAL SIGNAL COMMON STOCK (OR THE BENEFICIAL OWNER THEREOF THROUGH THE
NOMINEE) MUST RETURN TO THE EXCHANGE AGENT, WITH RECEIPT BY THE EXCHANGE AGENT
NO LATER THAN THE ELECTION DEADLINE (WHICH IS 5:00 P.M. (EASTERN TIME) ON
OCTOBER 2, 1998), A FORM OF ELECTION FULLY COMPLETED AND SIGNED, AND ACCOMPANIED
BY THE STOCK CERTIFICATES REPRESENTING THE SHARES OF GENERAL SIGNAL COMMON STOCK
FOR WHICH THE ELECTION IS BEING MADE. If the Stock Certificates are not
available at the time the Form of Election is sent to the Exchange Agent, the
General Signal stockholder may instead provide a guarantee of delivery from a
qualified financial institution (which in effect guarantees to SPX that the
Stock Certificates will be delivered to the Exchange Agent) (a "Guarantee of
Delivery") and must, within three NYSE trading days thereafter, deliver to the
Exchange Agent the Stock Certificates representing the shares in respect of
which an Election is being made. ANY GENERAL SIGNAL STOCKHOLDER WHO FAILS TO
DELIVER A PROPERLY COMPLETED AND SIGNED FORM OF ELECTION AND HIS OR HER STOCK
CERTIFICATES WITHIN THE REQUISITE PERIOD OF TIME WILL BE DEEMED TO HAVE MADE A
NON-ELECTION.
    
 
     General Signal's stockholders should consider that stockholders receiving
shares of SPX Common Stock in the Merger will receive, subject to the
limitations and the proration procedures described in this Joint Proxy
Statement/Prospectus, a number of shares of SPX Common Stock determined
utilizing an exchange ratio of 0.6977 (in the case of stockholders making a
Stock Election) and utilizing an exchange ratio of 0.4186 (in the case of
stockholders making a Mixed Election) of a share of SPX Common Stock for each
share of General Signal Common Stock. Because these exchange ratios were fixed
based on a trading price per share of SPX Common Stock of $64.50 (the trading
price on the last trading day prior to the public announcement of the
transaction) and because the trading price of the SPX Common Stock is subject to
fluctuation, the value of the shares of SPX Common Stock that holders of shares
of General Signal Common Stock may receive in the Merger in respect of their
shares of General Signal Common Stock, together with any cash they may receive,
may be less than, greater than or equal to $45.00 per share.
 
   
     Under the terms of the Merger Agreement, only 40% of the outstanding shares
of General Signal Common Stock will be exchanged for cash (the "Aggregate Cash
Consideration"), and only 60% of the outstanding shares of General Signal Common
Stock will be exchanged for SPX Common Stock (the
    
 
                                        8
<PAGE>   20
 
   
"Aggregate Stock Consideration"). The Merger Agreement provides for proration if
either of the foregoing limitations would otherwise be exceeded as a result of
the Elections made. Thus, if, as a result of the number of Cash Elections and
Mixed Elections made, SPX would be required to exchange more than 40% of the
outstanding shares of General Signal Common Stock for cash, then (i) every
General Signal stockholder who made a Stock Election would receive 0.6977 of a
share of SPX Common Stock per share for all of his or her shares of General
Signal Common Stock, (ii) every stockholder who made (or is deemed to have made)
a Non-Election would be treated as though he or she had made a Stock Election
and would receive 0.6977 of a share of SPX Common Stock per share for all of his
or her shares of General Signal Common Stock, (iii) each stockholder who made a
Mixed Election would be treated as though he or she had made a Stock Election,
and would receive 0.6977 of a share of SPX Common Stock per share, with respect
to 60% of his or her shares, and would be treated as though he or she had made a
Cash Election with respect to 40% of his or her shares, and (iv) each
stockholder who made a Cash Election and each stockholder who made a Mixed
Election, with respect to 40% of his or her shares, would receive a pro rata
portion of the Aggregate Cash Consideration and a pro rata portion of the
balance of the Aggregate Stock Consideration remaining after the distributions
of SPX Common Stock described in clauses (i) through (iii) above. Similarly, if,
as a result of the number of Stock Elections and Mixed Elections made, SPX would
be required to exchange more than 60% of the outstanding shares of General
Signal Common Stock for SPX Common Stock, then (i) every General Signal
stockholder who made a Cash Election would receive $45.00 in cash per share,
without interest, for all of his or her shares of General Signal Common Stock,
(ii) every stockholder who made (or is deemed to have made) a Non-Election would
be treated as though he or she had made a Cash Election and would receive $45.00
in cash per share, without interest, for all of his or her shares of General
Signal Common Stock, (iii) each stockholder who made a Mixed Election would be
treated as though he or she had made a Cash Election, and would receive $45.00
per share, without interest, with respect to 40% of his or her shares, and would
be treated as though he or she had made a Stock Election with respect to 60% of
his or her shares, and (iv) each stockholder who made a Stock Election and each
stockholder who made a Mixed Election, with respect to 60% of his or her shares,
would receive a pro rata portion of the Aggregate Stock Consideration and a pro
rata portion of the balance of the Aggregate Cash Consideration remaining after
the distributions of cash described in clauses (i) through (iii) above.
    
 
   
     If neither the cash nor the stock limitation is exceeded, but not every
stockholder of General Signal has made an Election, then each General Signal
stockholder who did make an Election will have his or her Election honored, and
the balance of the stockholders will share in the Aggregate Cash Consideration
and Aggregate Stock Consideration remaining on a pro rata basis.
    
 
   
     Stockholders of General Signal should send a properly completed and signed
Form of Election, together with their Stock Certificates or a Guarantee of
Delivery of such Stock Certificates, as set forth in the Form of Election, to
the Exchange Agent at the address set forth on the Form of Election. Shares for
which a Form of Election and other required documents are not properly completed
and received by the Exchange Agent prior to the Election Deadline will be deemed
to be shares with respect to which a Non-Election has been made, and the form of
Merger Consideration which holders of such shares will be entitled to receive
will be determined by the provisions of the Merger Agreement.
    
 
   
     After the consummation of the Merger, the Exchange Agent will mail a letter
of transmittal (a "Letter of Transmittal") (with instructions) to any holders of
record of General Signal Common Stock as of the Effective Time who did not send
in a Form of Election and their Stock Certificates prior to the Election
Deadline, for use in surrendering their Stock Certificates in exchange for the
Merger Consideration to which they are entitled. See "The Merger -- Treatment of
General Signal Stock Certificates" and "The Merger Agreement -- Exchange
Procedures."
    
 
NO DISSENTERS' RIGHTS
 
     Holders of SPX Common Stock and General Signal Common Stock are not
entitled to dissenters' rights in connection with the Merger.
 
                                        9
<PAGE>   21
 
NO SOLICITATION
 
   
     General Signal. General Signal has agreed, except as agreed by SPX, that it
will not, and will not permit any of its subsidiaries or its or its
subsidiaries' directors, officers, employees, agents or representatives,
directly or indirectly, to solicit, initiate or furnish non-public information
in furtherance of, any inquiries or the making of any proposal with respect to
certain business combinations or certain other transactions involving General
Signal, except that, at any time prior to the approval of the Merger by the
General Signal stockholders, General Signal may furnish information to, and
engage in discussions with, a third party with respect thereto if, but only if,
the General Signal Board determines in good faith by a majority vote, after
consultation with and receipt of advice from its outside legal counsel, that
failing to take such action would constitute a breach of the fiduciary duties of
the General Signal Board under applicable law and, after consulting with its
independent financial advisors, that such a proposal could reasonably be
expected to lead to a "Superior Transaction" (as defined in the Merger
Agreement). See "The Merger Agreement -- Certain Covenants -- No Solicitation of
Transactions."
    
 
   
     SPX. SPX has agreed that it will not, and will not permit any of its
subsidiaries or any of its or its subsidiaries' directors, officers, employees,
agents or representatives, directly or indirectly, to solicit or initiate any
inquiries or the making of any proposal with respect to certain business
combinations or certain other transactions involving SPX. See "The
Merger -- Certain Covenants -- No Solicitation of Transactions."
    
 
TERMINATION OF THE MERGER AGREEMENT
 
   
     The Merger Agreement may be terminated and the Merger may be abandoned at
any time prior to the Effective Time (notwithstanding any approval of the
General Signal Proposal by the General Signal stockholders or any approval of
the SPX Proposal by the SPX stockholders): (i) by mutual written consent of SPX
and General Signal, (ii) by either SPX or General Signal if the Merger has not
been consummated by December 31, 1998 (but this right will not be available to
any party whose failure to perform under the Merger Agreement resulted in the
failure of the Merger to occur by that date), (iii) by SPX if the General Signal
Board withdraws its recommendation of the Merger or changes it in a manner
adverse to SPX, refuses to affirm its recommendation as promptly as practicable
(but in any case within ten business days) after receipt of any written request
from SPX which request is made on a reasonable basis, or recommends that General
Signal enter into certain proposed business combinations, (iv) by General Signal
if the SPX Board withdraws its recommendation of the Merger or changes it in a
manner adverse to General Signal, refuses to affirm its recommendation as
promptly as practicable (but in any case within ten business days) after receipt
of any written request from General Signal which request is made on a reasonable
basis, or recommends that SPX enter into certain proposed business combinations,
(v) by SPX or General Signal if at the General Signal Special Meeting the
requisite vote of the General Signal stockholders to approve the General Signal
Proposal is not obtained, (vi) by SPX or General Signal if at the SPX Special
Meeting the requisite vote of the SPX stockholders to approve the SPX Proposal
is not obtained, (vii) by SPX or General Signal if any Law or Decree prohibits
or makes illegal the consummation of the Merger, or if any final non-appealable
Decree enjoining SPX or General Signal from consummating the Merger is entered,
(viii) by SPX or General Signal if there is a material breach by the other party
of its representations, warranties, covenants or agreements in the Merger
Agreement, which breach would result in the failure to satisfy any of the
conditions set forth in the Merger Agreement and which breach is not cured
within 30 days after written notice thereof to the breaching party, and (ix) by
General Signal in order to enter into a Superior Transaction, provided it has
complied with the applicable provisions of the Merger Agreement and has paid any
applicable fees and expenses. See "The Merger Agreement -- Termination" and "The
Merger Agreement -- Termination Fee; Reimbursement of Expenses."
    
 
TERMINATION FEE; REIMBURSEMENT OF EXPENSES
 
   
     In connection with certain of the termination rights discussed above,
General Signal may be obligated to pay SPX a termination fee of $60.0 million,
or to pay $5.0 million in reimbursement of SPX's expenses, and to compensate SPX
for fees incurred by SPX in connection with obtaining commitments for the
financing of the Merger. In connection with other termination rights discussed
above, SPX may be obligated to pay General
    
                                       10
<PAGE>   22
 
   
Signal a termination fee of $25.0 million, or to pay $5.0 million in
reimbursement of General Signal's expenses. See "The Merger
Agreement -- Termination Fee; Reimbursement of Expenses."
    
 
REGULATORY APPROVAL
 
   
     Under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended,
and the rules and regulations promulgated thereunder (the "HSR Act"), certain
merger transactions may not be consummated unless certain information has been
furnished to the Antitrust Division of the Department of Justice (the "Antitrust
Division") and the Federal Trade Commission (the "FTC") and certain applicable
waiting periods have expired. The Merger is subject to the requirements of the
HSR Act. Pursuant to the requirements of the HSR Act, SPX and General Signal
filed Notification and Report Forms with respect to the Merger with the
Antitrust Division and the FTC. On August 24, 1998, SPX and General Signal were
notified by the FTC that the FTC had granted early termination, effective as of
such date, of the HSR Act waiting period applicable to the Merger. SPX and
General Signal are required to notify or obtain the consent of regulatory
authorities in various foreign countries and are in the process of giving such
notices and obtaining such consents. See "The Merger Agreement -- Regulatory
Approvals."
    
 
COMPARATIVE STOCKHOLDER RIGHTS
 
   
     The rights of holders of General Signal Common Stock are currently governed
by New York law, General Signal's Certificate of Incorporation and General
Signal's By-Laws. If the Merger is consummated and becomes effective pursuant to
the terms of the Merger Agreement, the rights of former General Signal
stockholders who become stockholders of SPX pursuant to the Merger will be
governed by Delaware law, SPX's Certificate of Incorporation and SPX's By-Laws.
The rights of the SPX stockholders differ in certain respects from those of the
General Signal stockholders. See "Comparison of Rights of Stockholders of SPX
and General Signal."
    
 
MERGER FINANCING
 
   
     The total amount of cash and borrowings required to consummate the
transactions contemplated by the Merger Agreement, including payment of the
Aggregate Cash Consideration in the Merger, payments in respect of the General
Signal Options and Restricted Shares, refinancing of existing indebtedness of
SPX and General Signal, and transaction fees and expenses, is estimated to be
approximately $1.5 billion. Pursuant to a commitment letter dated September 2,
1998 (the "Commitment Letter"), financing for the transactions contemplated by
the Merger (the "Merger Financing") will be provided by The Chase Manhattan Bank
("Chase") and Chase Securities Inc. ("CSI") which will underwrite and syndicate
a total of $1.65 billion of senior debt (the "Senior Facilities"), consisting of
term loan facilities aggregating $1.4 billion (the "Term Loans") and a $250.0
million revolving credit facility (the "Revolving Credit Facility"), fully
underwritten by Chase. See "The Merger Agreement -- Merger Financing."
    
 
   
     The Senior Facilities will be jointly and severally guaranteed by each of
SPX's direct and indirect material domestic subsidiaries, subject to certain
exceptions to be agreed upon, and will also be secured by a pledge of (i) the
material assets of SPX and its direct and indirect material domestic
subsidiaries and (ii) all of the capital stock of SPX's direct and indirect
material subsidiaries, subject to certain limitations for foreign subsidiaries
and certain exceptions to be agreed upon. Receipt of the Merger Financing is not
a condition to SPX's obligation to consummate the Merger.
    
 
RISK FACTORS
 
   
     STOCKHOLDERS OF SPX AND GENERAL SIGNAL SHOULD CONSIDER CAREFULLY THE
FACTORS DISCUSSED UNDER "RISK FACTORS" ON PAGE 26 IN EVALUATING THE MERGER
AGREEMENT AND THE TRANSACTIONS CONTEMPLATED THEREBY.
    
 
                                       11
<PAGE>   23
 
                     MARKET PRICE AND DIVIDEND INFORMATION
 
     The SPX Common Stock is listed and principally traded on the NYSE (under
the symbol "SPW") and is also listed on the PE. The General Signal Common Stock
is listed and principally traded on the NYSE (under the symbol "GSX") and is
also listed on the PE. The following table sets forth the high and low trading
prices per share of each of the SPX Common Stock and General Signal Common Stock
for the periods indicated as reported on the NYSE Composite Tape, and the
dividends declared per common share for such periods by SPX and General Signal:
 
   
<TABLE>
<CAPTION>
                                       SPX COMMON STOCK              GENERAL SIGNAL COMMON STOCK
                                -------------------------------      ----------------------------
                                HIGH      LOW      DIVIDENDS(A)      HIGH      LOW      DIVIDENDS
                                ----      ---      ------------      ----      ---      ---------
<S>                             <C>       <C>          <C>           <C>       <C>        <C>
1995
  First Quarter...............  $17 3/8   $14 1/4      $.10          $36 3/8   $31        $.24
  Second Quarter..............   15 1/8    10 3/4       .10           40        35 1/8     .24
  Third Quarter...............   16        11 1/8       .10           42 1/2    28         .24
  Fourth Quarter..............   17        14 1/8       .10           33 7/8    28         .24
1996
  First Quarter...............   18 1/8    13 5/8       .10           37 3/4    32         .24
  Second Quarter..............   27 1/8    18           .10           40 1/8    35 1/4     .24
  Third Quarter...............   31 5/8    21 5/8       .10           44 1/4    36 1/4     .24
  Fourth Quarter..............   40 1/2    26 7/8       .10           44 1/2    39 3/4     .255
1997
  First Quarter...............   49 3/4    37 3/8       .10           46 3/4    38 1/2     .255
  Second Quarter..............   70 5/8    41 7/8        --           46 3/4    36 1/8     .255
  Third Quarter...............   65 3/4    49            --           53        37 3/16    .255
  Fourth Quarter..............   70 3/8    58 7/16       --           44 7/8    36 5/8     .27
1998
  First Quarter...............   79 1/4    65 3/16       --           47 1/4    37 3/4     .27
  Second Quarter..............   77 15/16  63 5/8        --           46 15/16  35 13/16   .27
  Third Quarter (through
     September 2, 1998).......   66 3/4    48 5/16       --           42 13/16  35 9/16     --(b)
</TABLE>
    
 
- ---------------
   
(a) In April 1997, SPX eliminated its quarterly cash dividend and stated that
    future distributions to stockholders would be in the form of open market
    purchases of SPX Common Stock when deemed appropriate by management.
    
 
   
(b) General Signal has agreed in the Merger Agreement not to pay any further
    dividends prior to the Effective Time.
    
 
   
     On July 17, 1998, the last full trading day prior to the public
announcement by SPX and General Signal of the execution of the Merger Agreement,
the reported high and low sale prices and closing price per share of SPX Common
Stock and General Signal Common Stock on the NYSE Composite Tape and per share
of General Signal Common Stock on an equivalent share basis based on the Merger
Consideration of $18.00 in cash and 0.4186 of a share of SPX Common Stock were
as follows:
    
 
<TABLE>
<CAPTION>
                                                        PER SHARE            PER EQUIVALENT SHARE
                                                   -----------------------   --------------------
                                                   HIGH    LOW       CLOSE   HIGH    LOW    CLOSE
                                                   ----    ---       -----   ----    ---    -----
<S>                                                <C>     <C>       <C>     <C>     <C>    <C>
SPX..............................................  $65 1/2 $64 7/16  $64 1/2 $--     $--    $--
General Signal...................................   38 3/8  36 1/4   37 5/8  45 7/16  45    45
</TABLE>
 
   
     On September 2, 1998, the last full trading day prior to the date of this
Joint Proxy Statement/ Prospectus, the reported closing price per share of SPX
Common Stock and General Signal Common Stock on the NYSE Composite Tape were
$48.4375 and $36.625, respectively. STOCKHOLDERS OF SPX AND GENERAL SIGNAL ARE
URGED TO OBTAIN CURRENT MARKET QUOTATIONS FOR SHARES OF SPX COMMON STOCK AND
GENERAL SIGNAL COMMON STOCK.
    
 
                                       12
<PAGE>   24
 
                           COMPARATIVE PER SHARE DATA
                                  (UNAUDITED)
 
   
     The following table presents historical and pro forma adjusted historical
per share data of SPX, historical and pro forma adjusted historical per share
data of General Signal and pro forma combined per share data as if the Merger
had occurred as of January 1, 1997, assuming an exchange ratio of 0.4186 for all
outstanding shares of General Signal Common Stock. The table also presents
General Signal's pro forma equivalent per share data. See "Selected Historical
Financial Data of SPX," "Selected Historical Financial Data of General Signal"
and "Selected Pro Forma Condensed Combined Financial Data of SPX and General
Signal" for additional information regarding this pro forma information. The pro
forma combined per share data are intended for information purposes, and do not
purport to represent what the combined entity's results of continuing operations
would actually have been had the transaction in fact occurred at an earlier
date, or project the results for any future date or period. Upon consummation of
the Merger, the actual financial position and results of operations of the
combined company will differ, perhaps significantly, from the pro forma amounts
reflected herein due to a variety of factors, including changes in operating
results between the date of the pro forma financial information and the date on
which the Merger is consummated and thereafter, as well as the factors discussed
under "Risk Factors."
    
 
   
<TABLE>
<CAPTION>
                                                                                           GENERAL SIGNAL
                                                                              PRO FORMA      PRO FORMA
                                                SPX(a)   GENERAL SIGNAL(a)   COMBINED(b)   EQUIVALENT(c)
                                                ------   -----------------   -----------   --------------
<S>                                             <C>      <C>                 <C>           <C>
Income (loss) per common share from continuing
  operations:
Basic:
  Six months ended June 30, 1998..............  $2.40         $ 1.20           $ 1.43          $0.60
  Year ended December 31, 1997................  (2.80)          2.22             0.09           0.04
Diluted:
  Six months ended June 30, 1998..............   2.33           1.19             1.42           0.59
  Year ended December 31, 1997................  (2.80)          2.21             0.08           0.03
Dividends per common share:(d)
  Six months ended June 30, 1998..............     --           0.54               --             --
  Year ended December 31, 1997................   0.10          1.035              .10           0.04
Book value per common share:
  June 30, 1998...............................  (3.27)         11.23            14.41           6.03
  December 31, 1997...........................  (3.63)         13.37            18.08           7.57
</TABLE>
    
 
- ---------------
(a) The six-month and twelve-month information for SPX and General Signal
    represents SPX's and General Signal's historical information as of and for
    the six months ended June 30, 1998 and SPX's and General Signal's pro forma
    adjusted historical information as of and for the year ended December 31,
    1997, respectively. See "Pro Forma Adjusted Historical Financial Data of
    SPX" and "Pro Forma Adjusted Historical Financial Data of General Signal."
 
(b) See "Pro Forma Condensed Combined Financial Data of SPX and General Signal."
 
(c) General Signal's pro forma equivalent per share information represents the
    pro forma combined per share information multiplied by an exchange ratio of
    0.4186.
 
(d) In April 1997, SPX eliminated its quarterly cash dividend and stated that
    future distributions to stockholders would be in the form of open market
    purchases of SPX Common Stock when deemed appropriate by management.
 
                                       13
<PAGE>   25
             SELECTED HISTORICAL CONSOLIDATED FINANCIAL DATA OF SPX
                                  (unaudited)
                      (in millions, except per share data)
 
     The following table sets forth selected historical consolidated financial
data for SPX for each of the five years in the period ended December 31, 1997
and for the six-month periods ended June 30, 1998 and 1997. Such data have been
derived from, and should be read in conjunction with, the audited consolidated
annual financial statements and other financial information contained in SPX's
1997 Form 10-K and the unaudited consolidated interim financial information
contained in SPX's Second Quarter Form 10-Q, including the notes thereto,
incorporated by reference herein. The operating results for the six months ended
June 30, 1998 are not necessarily indicative of the results that may be expected
for the year ended December 31, 1998. The selected historical financial data are
qualified in their entirety by reference to the historical financial statements
(and related notes) which are incorporated by reference herein. See "Available
Information" and "Incorporation of Documents by Reference."
 
<TABLE>
<CAPTION>
                                   AS OF AND FOR THE
                                    SIX MONTHS ENDED
                                        JUNE 30,                    AS OF AND FOR THE YEAR ENDED DECEMBER 31,
                                  --------------------      ---------------------------------------------------------
                                  1998(a)      1997(b)      1997(b)      1996(c)       1995      1994(d)    1993(e,f)
                                  -------      -------      -------      --------    --------    --------   ---------
<S>                               <C>          <C>          <C>          <C>         <C>         <C>        <C>
STATEMENT OF INCOME DATA:
Revenues........................  $462.0       $466.9       $922.3       $1,109.4    $1,098.1    $1,079.9   $  747.2
Cost of products sold...........   332.7        340.2        669.0          850.1       853.5       821.5      508.0
Selling, general and
  administrative................    83.4         87.2        175.3          186.5       194.5       198.0      204.1
Other operating expenses,
  net(g)........................     1.7          1.9          3.9            1.9         8.3         2.9       53.4(d)
Special charges and
  (gains)(h)....................    (7.1)(i)      6.5(j)     116.5(j)        87.9(k)     10.7(k)       --       27.5(l)
                                  ------       ------       ------       --------    --------    --------   --------
Operating income (loss).........    51.3         31.1        (42.4)         (17.0)       31.1        57.5      (45.8)
Other expense (income), net.....    (1.4)       (72.7)(b)    (74.2)(b)       (0.7)       (3.0)        0.1     (102.9)(f)
Interest expense, net...........     7.9          7.3         13.9           31.8        35.7        35.2       15.9
                                  ------       ------       ------       --------    --------    --------   --------
Income (loss) before income
  taxes.........................    44.8         96.5         17.9          (48.1)       (1.6)       22.2       41.2
Income taxes....................    16.1         49.8         21.3            7.6        (0.2)        9.1       28.1
                                  ------       ------       ------       --------    --------    --------   --------
Income (loss) from continuing
  operations....................    28.7         46.7         (3.4)         (55.7)       (1.4)       13.1       13.1
Discontinued operation(m).......      --           --           --             --        (2.8)        1.0        2.1
Cumulative effect of accounting
  changes(n)....................      --           --           --             --          --          --      (31.8)
Extraordinary items (o).........      --        (10.3)       (10.3)          (6.6)       (1.1)         --      (24.0)
                                  ------       ------       ------       --------    --------    --------   --------
Net income (loss)...............  $ 28.7       $ 36.4       $(13.7)      $  (62.3)   $   (5.3)   $   14.1   $  (40.6)
                                  ======       ======       ======       ========    ========    ========   ========
Income (loss) per share from
  continuing operations:
    Basic.......................  $  2.40      $ 3.44      $ (0.27)     $   (4.04)  $   (0.10)  $    1.02  $    1.04
    Diluted.....................     2.33        3.33        (0.27)         (4.04)      (0.10)       1.02       1.04
Weighted average number of
  common shares outstanding:
    Basic.......................   11.972(p)   13.571(p)    12.754(p)      13.785      13.173      12.805     12.604
    Diluted.....................   12.342(p)   14.040(p)    12.754(p)      13.785      13.173      12.805     12.604
Dividends per share.............  $    --(p)  $  0.10(p)   $  0.10(p)   $    0.40   $    0.40   $    0.40  $    0.40
OTHER FINANCIAL DATA:
Total assets....................  $ 642.9      $551.5       $583.8       $  616.0    $  831.4    $  929.0   $1,024.4
Total debt......................    262.0       197.4        205.3          229.3       319.8       415.2      430.2
Stockholders' equity
  (deficit).....................    (38.4)       24.4        (43.4)         105.9       162.2       158.7      145.4
Capital expenditures............    14.6         10.6         22.6           20.2        31.0        48.5       15.1
Depreciation and amortization...    12.0         13.3         25.0           40.8        43.5        38.5       24.4
</TABLE>
 
Note: The accompanying notes are an integral part of the selected historical
      consolidated financial data.
 
                                       14
<PAGE>   26
 
        NOTES TO SELECTED HISTORICAL CONSOLIDATED FINANCIAL DATA OF SPX
                                  (unaudited)
                      (in millions, except per share data)
 
(a)  Late in the second quarter of 1998, SPX acquired 89% of Tecnotest S.r.l.,
     an Italian company, and 100% of The Valley Forge Group for a combined
     purchase price of $59.0 in cash and assumed debt. Annual revenues of these
     unrelated businesses are approximately $55.0. Had these acquisitions taken
     place on January 1, 1997, consolidated revenues and income would not have
     been significantly different from reported 1997 results.
 
   
(b)  During 1997, SPX sold its Sealed Power division for $223.0 in gross cash
     proceeds. SPX recorded a pretax gain of $71.9, or $31.2 after-tax. Annual
     1996 revenues of this division were approximately $230.0. See "Pro Forma
     Adjusted Historical Financial Data of SPX."
    
 
(c)  During 1996, SPX sold its Hy-Lift division for approximately $15.0. Annual
     1995 revenues of this division were approximately $45.0.
 
(d)  Effective December 31, 1993, SPX acquired the balance of Sealed Power
     Technologies ("SPT") for $39.0. SPX previously owned 49% of SPT and
     accounted for its investment using the equity method. SPT's 1993 revenues
     were $392.0. As a result of this acquisition, SPX was required to recognize
     its share of SPT's losses, $26.9, in 1993. Also in 1993, SPX initiated
     consolidation of Sealed Power Europe Limited Partnership which required
     recognition of cumulative losses of the partnership since its inception,
     resulting in a charge of $21.5. These charges have been included in other
     operating expenses, net.
 
(e)  During 1993, SPX acquired Allen Testproducts and its related leasing
     company for $102.0. Annual 1992 revenues of the businesses acquired were
     approximately $83.0.
 
   
(f)  During 1993, SPX divested its Sealed Power Replacement and Truth divisions
     for a gain of $105.4 or $64.2 after-tax. Annual 1992 revenues of these
     divisions were approximately $247.0.
    
 
   
(g)  Other operating expenses, net include goodwill/intangible amortization,
     minority interest, and earnings from equity interests.
    
 
(h)  Special charges and gains include certain legal costs, restructuring
     charges, write-off of goodwill, and liquidation of certain investments.
 
   
(i)  The first six months of 1998 included a $13.7 realized gain on SPX's
     investment in Echlin Inc., which was liquidated during the second quarter,
     and $6.6 of expenses associated with SPX's offer to acquire Echlin Inc.
    
 
   
(j)  These charges included a $99.0 restructuring charge, a $4.1 charge for five
     corporate executive staff reductions, and $13.4 of costs associated with
     various legal matters, including $6.5 of anticipated future legal costs
     associated with the ongoing litigation with Snap-on Incorporated, legal
     costs associated with a settled case in California, and certain other
     matters.
    
 
   
     SPX recorded the $99.0 restructuring charge to combine two divisions within
     the Service Solutions segment and to recognize reduced carrying value of
     certain assets resulting from the decision to combine the divisions and
     exit certain manufactured diagnostic equipment product lines. The
     restructuring of the two Service Solutions businesses was in response to
     changing market dynamics and changing needs of customers. SPX decided to
     combine its OE Tool and Equipment business with its Aftermarket Tool and
     Equipment business to provide a single business focused on the combined
     market and customer needs. Additionally, SPX decided to exit certain
     products to focus upon new generation products that would better meet
     customer needs. The decision resulted in a reduction of workforce and
     closing of certain facilities. The components of the charge were computed
     based on management's estimate of the realizable value of the affected
     tangible and intangible assets and estimated exit costs including severance
     and other employee benefits based on existing severance policies and local
     laws.
    
 
                                       15
<PAGE>   27
 
  NOTES TO SELECTED HISTORICAL CONSOLIDATED FINANCIAL DATA OF SPX (CONTINUED)
                                  (unaudited)
                      (in millions, except per share data)
 
     The $99.0 charge included $63.7 of restructuring costs, $25.8 of reduced
     inventory value and $9.5 of reduced value of other tangible and intangible
     assets related to exiting certain product lines. The $63.7 of restructuring
     costs included $13.7 of severance related costs for approximately 800
     people, $20.3 for incremental repossession and distribution exit costs
     (including the termination of lease financing and distributor agreements),
     $21.2 for incremental service and software update obligations resulting
     from SPX's decision to maintain adequate service capabilities and
     appropriate software updates of the exited products for customers who have
     previously purchased the exited products, and $8.5 of costs associated with
     idled facilities. The implementation of this restructuring is expected to
     be substantially complete by the end of 1998.
 
     Of the total special charges of $116.5, the components of the charge that
     will require the future payment of cash are $80.9. Cash payments through
     June 1998 related to the special charges were $16.5. The expected future
     cash payments include an estimated $34.0 over the balance of 1998 with the
     remainder, principally repossession costs and service and software update
     obligations, over the following two years. As there is some uncertainty
     associated with the timing of the cash payments, the remaining accrual at
     June 30, 1998 of $64.2 has been classified in other current accrued
     liabilities. Management estimates that savings from the restructuring will
     increase operating income by $3.0 in 1998 and $10.0 in 1999. The savings
     result primarily from the reduction in headcount and facilities.
 
(k)  During the fourth quarter of 1995, management authorized and committed SPX
     to undertake two significant restructuring plans. The first plan
     consolidated five Service Solutions divisions into two divisions. The
     second plan closed Sealed Power division's German foundry operation and
     transferred certain piston ring operations to other facilities. In 1996,
     three additional restructuring actions were initiated including an early
     retirement program at the Service Solutions divisions, a cost reduction
     initiative at several Service Solutions international locations, and an
     early retirement program at the Sealed Power division. A summary of these
     restructurings follows:
 
   
<TABLE>
<CAPTION>
                                                              1996     1995
                                                              -----    -----
<S>                                                           <C>      <C>
Service Solutions -- Five divisions consolidated into two
  divisions.................................................  $11.2    $ 7.0
Service Solutions -- Early retirement.......................    1.1       --
Service Solutions -- International..........................    3.5       --
SPD -- Closing foundry at SP Europe.........................     --      3.7
SPD -- Early retirement.....................................    4.2       --
                                                              -----    -----
          Total.............................................  $20.0    $10.7
                                                              =====    =====
</TABLE>
    
 
   
     Service Solutions -- Restructuring. In order to improve customer service,
     reduce costs and improve productivity and asset utilization, SPX decided to
     consolidate five existing Service Solutions divisions into two. This
     restructuring plan involved closing two SPX owned manufacturing facilities,
     an SPX owned distribution facility, several leased service centers and a
     leased sales facility in France. The plan also included combining sales,
     engineering and administrative functions, and was completed at the end of
     1996. The plan included the termination of approximately 570 employees
     resulting in a net reduction of approximately 310 employee positions after
     considering staffing requirements at remaining facilities.
    
 
     SPX recorded a $7.0 charge in 1995 and an $11.2 charge in 1996 to complete
     this restructuring. These charges recognized severance and benefits for
     employees to be terminated, holding costs of vacated facilities, the
     adjustment to fair market value of one manufacturing facility to be closed,
     and other costs to complete the consolidation of the divisions. The
     distribution facility was sold during the fourth quarter of 1996 and the
     manufacturing facilities were sold during 1997.
 
                                       16
<PAGE>   28
 
  NOTES TO SELECTED HISTORICAL CONSOLIDATED FINANCIAL DATA OF SPX (CONTINUED)
                                  (unaudited)
                      (in millions, except per share data)
 
   
     Service Solutions -- Early Retirement. Closely associated with the
     consolidation of five divisions into two, an early retirement program was
     accepted by approximately 60 people and SPX recorded a $1.1 charge in the
     first quarter of 1996.
    
 
   
     Service Solutions -- International. During the second quarter of 1996, SPX
     recorded a $3.5 restructuring charge principally to recognize severance
     associated with the termination of 113 international employees and related
     operating downsizing costs.
    
 
   
     SPD -- Closing Foundry at SP Europe. SPX closed its unprofitable foundry
     operations at SP Europe and transferred certain piston ring operations to
     other facilities. This closing resulted in the elimination of approximately
     200 positions and was completed at the end of the third quarter of 1996. In
     1995, SPX recorded a $3.7 restructuring charge to accrue severance that was
     paid to these employees.
    
 
   
     SPD -- Early Retirement. During the second quarter of 1996, SPX recorded a
     $4.2 restructuring charge for the early retirement of 94 employees at the
     Sealed Power division.
    
 
     The cost savings associated with the 1995 and 1996 restructuring actions,
     described above, relate primarily to the Service Solutions restructuring
     actions. The actual savings achieved in 1996 and 1997 have been consistent
     with the estimated full year savings of $23.0 by the year 1998. These
     actions increased operating income by an estimated $7.0 in 1996 and an
     estimated $12.0 in 1997.
 
     These charges were recorded in the appropriate periods in accordance with
     the requirements of Emerging Issues Task Force Pronouncement 94-3. Certain
     costs incurred in connection with management's planned actions not
     qualifying for accrual in 1995 were recorded in 1996, based on employee
     acceptance of voluntary termination benefits and the satisfaction of other
     requirements to recognize these costs. At December 31, 1997, the
     restructuring actions initiated in 1995 and 1996 were complete and the
     actual costs to implement the actions did not differ materially from the
     estimates used to record these accruals.
 
   
     Also during 1996, SPX recognized a $67.8 goodwill write-off, with no
     related tax benefit. The goodwill was related to the 1988 acquisition of
     Bear Automotive Company and the 1993 acquisition of Allen Testproducts,
     collectively referred to as Automotive Diagnostics. This goodwill
     represented SPX's intangible business investment in PC-based engine
     diagnostic equipment, wheel service equipment and gas emissions testing
     equipment. At December 31, 1995, management's analysis of this business
     projected that the cost savings, market synergies and other factors which,
     in part, would be realized from the Bear Automotive Company and Allen
     Testproducts combination in 1995 and various subsequent restructuring
     actions would result in non-discounted operating income sufficient to
     exceed goodwill amortization. The decision to write off the goodwill
     resulted from conclusions drawn from SPX's strategic review process that
     was completed in December 1996. The strategic review found accelerating
     technological changes had significantly reduced the remaining life of
     PC-based diagnostic equipment. The process also found significant
     uncertainties about the future opportunities related to gas emissions
     testing equipment, and a decline in SPX's wheel service equipment market
     share. Management's analysis of this business at December 31, 1996
     projected significant differences in business conditions from its December
     31, 1995 analysis, including declining revenues and margins of diagnostic
     and wheel service equipment and reduced revenues related to the emissions
     testing equipment due to the uncertainties about the future status of the
     state emissions programs. This analysis indicated that the businesses, as
     originally acquired, would not be able to generate operating income
     sufficient to offset the goodwill amortization. Assessing the impact of
     these factors on the businesses, as originally acquired, management
     concluded that Automotive Diagnostics' goodwill was impaired.
    
 
   
(l)  During 1993, SPX recognized a special charge to combine its Bear Automotive
     Company operation with Allen Testproducts of $27.5, or $18.5 after-tax.
    
 
                                       17
<PAGE>   29
 
  NOTES TO SELECTED HISTORICAL CONSOLIDATED FINANCIAL DATA OF SPX (CONTINUED)
                                  (unaudited)
                      (in millions, except per share data)
 
   
(m)  During 1995, SPX sold SPX Credit Corporation and recorded a pretax loss of
     $4.8, or $3.0 after-tax. The financial results of this operation are
     included as a discontinued operation through the date of divestiture.
    
 
(n)  During 1993, SPX adopted a new accounting methodology for its ESOP and
     reflected its 49% share of SPT's adoption of SFAS No. 106 regarding
     accounting for postretirement benefits other than pensions.
 
   
(o)  During 1997, SPX repurchased substantially all ($126.7) of its outstanding
     11 3/4% senior subordinated notes. SPX recorded an extraordinary item, net
     of taxes, of $10.3 for the costs to purchase the notes through a tender
     offer. During 1996, SPX purchased $99.9 of these notes and recorded an
     extraordinary item, net of taxes, of $6.6 for the costs to purchase the
     notes. During 1995, SPX purchased $31.7 of these notes and recorded an
     extraordinary item, net of taxes, of $1.1 for the costs to purchase the
     notes. During 1993, SPX recorded the costs associated with prepayment of
     certain SPX and SPT indebtedness totaling $24.0, net of taxes, as an
     extraordinary item.
    
 
(p)  During 1997, SPX purchased 2.147 shares of SPX Common Stock through a Dutch
     Auction self-tender offer for $56.00 per share. As of December 31, 1997,
     SPX had purchased an additional 0.390 shares through open market purchases.
     During the first six months of 1998, SPX purchased an additional 0.398
     shares through open market purchases. Also, concurrent with the Dutch
     Auction, SPX announced the elimination of quarterly cash dividends and
     stated that future distributions to stockholders would be in the form of
     open market purchases of SPX Common Stock, when deemed appropriate by
     management.
 
                                       18
<PAGE>   30
       SELECTED HISTORICAL CONSOLIDATED FINANCIAL DATA OF GENERAL SIGNAL
                                  (unaudited)
                        (in millions, except per share data)
 
     The following table sets forth selected historical consolidated financial
data for General Signal for each of the five years in the period ended December
31, 1997 and for the six-month periods ended June 30, 1998 and 1997. Such data
have been derived from, and should be read in conjunction with, the audited
consolidated annual financial statements and other financial information
contained in General Signal's 1997 Form 10-K and the unaudited consolidated
interim financial information contained in General Signal's Second Quarter Form
10-Q, including the notes thereto, incorporated by reference herein. The
operating results for the six months ended June 30, 1998 are not necessarily
indicative of the results that may be expected for the year ended December 31,
1998. The selected historical financial data are qualified in their entirety by
reference to the historical financial statements (and related notes) which are
incorporated by reference herein. See "Available Information" and "Incorporation
of Documents by Reference."
 
<TABLE>
<CAPTION>
                                      AS OF AND FOR THE
                                       SIX MONTHS ENDED
                                           JUNE 30,                   AS OF AND FOR THE YEAR ENDED DECEMBER 31,
                                    ----------------------    ----------------------------------------------------------
                                      1998      1997(b)(c)    1997(b)(c)    1996(d)     1995(e)     1994(f)     1993(g)
                                    --------    ----------    ----------    --------    --------    --------    --------
<S>                                 <C>         <C>           <C>           <C>         <C>         <C>         <C>
STATEMENT OF INCOME DATA:
Net sales.........................  $  776.1     $1,045.2      $1,954.6     $2,065.0(k) $1,863.2    $1,527.7    $1,354.2
Cost of sales(a)..................     505.7        699.2       1,313.6(i)   1,369.7(k)  1,246.9     1,064.8(m)    902.6
Selling, general and
  administrative(a)...............     186.6        232.5         444.9(i)     455.6(k)    403.0       331.2(m)    307.3
Other operating expenses,
  net(a)..........................       7.3          7.6          14.6         16.6        12.5         5.8         8.4
Special charges and (gains)(a)....        --           --            --           --        20.1(l)       --       (19.8)(o)
Operating income..................      76.5        105.9         181.5        223.1       180.7       125.9       155.7
                                    --------     --------      --------     --------    --------    --------    --------
Other expense (income)(a).........        --           --         (72.7)(b)    (20.8)(d)       --      (46.2)(n)       --
Equity in earnings of EGS(c)......     (20.0)          --         (11.8)          --          --          --          --
Interest expense, net.............       8.6          8.0          13.2         21.5        24.3        11.8        16.6
                                    --------     --------      --------     --------    --------    --------    --------
Income from continuing operations
  before income taxes.............      87.9         97.9         252.8        222.4       156.4       160.3       139.1
Income taxes......................      33.8         39.2         121.8         89.0        56.3        56.2(m)     41.0
                                    --------     --------      --------     --------    --------    --------    --------
Income from continuing
  operations......................      54.1         58.7         131.0        133.4       100.1       104.1        98.1
Discontinued operations(f)........        --           --           2.3           --       (64.0)      (23.4)      (31.5)
Cumulative effect of accounting
  changes.........................        --           --          (3.7)(j)       --          --          --       (25.3)(p)
Extraordinary items...............        --           --            --           --          --          --        (6.6)(q)
                                    --------     --------      --------     --------    --------    --------    --------
Net income........................  $   54.1     $   58.7      $  129.6     $  133.4    $   36.1    $   80.7    $   34.7
                                    ========     ========      ========     ========    ========    ========    ========
Income per share from continuing
  operations:
  Basic...........................  $   1.20     $   1.15      $   2.61     $   2.68    $   2.04    $   2.20    $   2.17
  Diluted.........................      1.19         1.14          2.60         2.62        2.01        2.16        2.13
Weighted average number of common
  shares outstanding:
  Basic...........................      45.2(h)      51.2(h)       50.2(h)      49.7        49.2        47.3        45.2
  Diluted.........................      45.6(h)      51.5(h)       50.4(h)      52.3        51.8        50.1        48.0
Dividends per share...............  $   0.54     $   0.51      $  1.035     $  0.975    $   0.96    $  0.915    $   0.90
OTHER FINANCIAL DATA:
Total assets......................  $1,376.3     $1,549.9      $1,388.0     $1,551.0    $1,613.2    $1,357.9    $1,224.9
Total debt........................     374.0        252.3         216.4        206.9       437.6       271.3       200.7
Stockholders' equity..............     489.7        722.4         629.7        743.8       578.1       547.9       525.2
Capital expenditures..............      24.6         26.3          56.5         59.3        49.0        74.8        55.1
Depreciation and amortization.....      29.3         35.6          65.3         69.2        62.8        48.4        46.4
</TABLE>
 
Note: The accompanying notes are an integral part of the selected historical
      consolidated financial data.
 
                                       19
<PAGE>   31
 
            NOTES TO SELECTED HISTORICAL CONSOLIDATED FINANCIAL DATA
                               OF GENERAL SIGNAL
                                     (unaudited)
                         (in millions, except per share data)
 
   
(a)  Certain reclassifications to General Signal's previously reported income
     data have been made to conform with the presentation of the combined
     company. These reclassifications include: (1) classifying certain
     engineering and research and development costs as selling, general and
     administrative expense rather than as cost of sales, (2) classifying
     goodwill and other intangible amortization as other operating expenses
     rather than selling, general and administrative expense, and (3)
     classifying gains on the sales of business units and breakup fees as other
     expenses (income) rather than other charges and credits. These
     reclassifications do not affect previously reported earnings from
     continuing operations before income taxes.
    
 
   
(b)  During 1997, General Signal sold General Signal Pump Group ("GSPG") to
     Pentair Inc. for approximately $200.0. General Signal recorded a pre-tax
     gain of $63.7, or $17.2 after-tax. The effective tax rate on the sale of
     GSPG differs from the statutory rate due to a difference in book and tax
     basis of GSPG. Annual 1996 sales of GSPG were approximately $201.0. See
     "Pro Forma Adjusted Historical Financial Data of General Signal." General
     Signal also sold its equity interest in a Mexican company for a $9.0
     pre-tax gain, or $2.3 after-tax.
    
 
   
(c)  During 1997, General Signal and Emerson Electric Co. ("Emerson") formed EGS
     Electrical Group LLC ("EGS"), a joint venture combining General Signal
     Electrical Group ("GSEG") with Emerson's Appleton Electric operations.
     General Signal contributed substantially all of the operating assets of
     GSEG to EGS, in exchange for a 47.5% ownership interest in EGS. Annual 1996
     sales of GSEG were approximately $294.0. General Signal records its
     investment in EGS under the equity method of accounting on a three month
     lag basis, effective January 1, 1998. See "Pro Forma Adjusted Historical
     Financial Data of General Signal."
    
 
   
     Pursuant to a letter agreement dated July 19, 1998, General Signal and
     Emerson have agreed that General Signal will acquire all of the assets and
     assume all of the liabilities of the Dual-Lite and Edwards divisions of EGS
     immediately prior to the consummation of the Merger. These divisions had
     been contributed to EGS by General Signal at the time of the formation of
     EGS. In exchange for these businesses, General Signal's ownership interest
     in EGS will be reduced from 47.5% to 44.5%. This transaction will not occur
     if the Merger Agreement is terminated. Had this transaction taken place on
     January 1, 1997, consolidated net sales and net income would not be
     significantly different from reported results.
    
 
   
(d)  In 1996, General Signal sold Kinney Vacuum Company ("Kinney") for $29.0 and
     recognized a pre-tax gain of $20.8. Annual 1995 sales of this business were
     approximately $25.0.
    
 
   
(e)  During 1995, General Signal made three significant acquisitions. In June,
     General Signal completed a cash tender offer for Best Power Technology,
     Inc. ("Best Power") for $206.3. In July, General Signal acquired Waukesha
     Electric Inc. ("Waukesha Electric") for $73.9. The acquisitions of Best
     Power and Waukesha Electric were recorded under the purchase method of
     accounting. In November, General Signal merged in a pooling of interests
     with Data Switch Corporation ("Data Switch") by exchanging 1.8 shares of
     General Signal Common Stock and 0.2 rights to receive General Signal Common
     Stock for all outstanding common stock and related options and warrants of
     Data Switch. Combined annual 1994 sales of these unrelated businesses were
     approximately $336.0.
    
 
(f)  Late in 1994, General Signal adopted a plan to sell Leeds & Northrup
     Company ("L&N") and Dynapower/Stratopower ("Dynopower") and recorded a
     charge of $25.8 after-tax on the disposal of these operations. Income from
     these discontinued operations in 1994 was $2.4 after-tax. As of December
     31, 1996, substantially all related assets were sold. In 1995, General
     Signal recorded total charges of $64.0 after-tax for additional expected
     losses related to the disposal of these businesses. In 1997, due to less
     than expected losses, $2.3 after-tax of these charges were reversed into
     income. The
 
                                       20
<PAGE>   32
 
            NOTES TO SELECTED HISTORICAL CONSOLIDATED FINANCIAL DATA
                         OF GENERAL SIGNAL (CONTINUED)
                                  (unaudited)
                      (in millions, except per share data)
 
     financial results of these operations are included as discontinued
     operations through the date of divestiture. Annual 1993 sales of these
     businesses were approximately $176.0. The loss from these discontinued
     operations was $31.5 after-tax in 1993.
 
(g)  In 1993, General Signal merged in a pooling of interests with Revco
     Scientific, Inc. ("Revco") by exchanging 2.6 shares of common stock for all
     of the outstanding common stock of Revco. Annual 1992 sales of this
     business were approximately $56.0.
 
(h)  In December 1996, General Signal called for the redemption of its 5.75%
     convertible subordinated notes. General Signal also initiated a share
     buy-back program of up to $100.0 to offset any shares issued as a result of
     the redemption. By April 1997, the program was completed with a total of
     2.5 shares repurchased for $100.0. In June 1997, General Signal initiated
     another share buy-back program of up to $150.0, subject to the consummation
     of the GSPG divestiture. In September 1997, this program was increased to
     $300.0. During 1997, 3.3 shares were purchased for $140.4 and during 1998,
     3.5 shares were purchased for $159.6 to complete this program.
 
   
(i)  During the second half of 1997, General Signal recorded a pre-tax gain of
     $10.0 on the settlement of patent litigation and sale of related patents.
     General Signal also recorded pre-tax charges of $27.9 for asset valuations,
     restructuring charges, lease termination costs and other matters. These
     charges and gains were recorded in cost of sales ($11.l) and in selling,
     general and administrative expense ($6.8).
    
 
(j)  In 1997, General Signal expensed all previously capitalized business
     process reengineering costs as a cumulative effect of a change in
     accounting principle of $3.7, net of income tax. This change was in
     accordance with Emerging Issues Task Force of the Financial Accounting
     Standards Board consensus 97-13, "Accounting for Costs Incurred in
     Connection with a Consulting Engagement or an Internal Project that
     Combines Business Process Reengineering and Information Technology
     Transformation."
 
(k)  During 1996, General Signal recorded $4.2 in net sales for a royalty
     settlement. General Signal also recorded pretax charges of $17.9 for asset
     write-downs, lease termination costs, severance, warranty repairs and
     environmental matters, net of an insurance gain on the recovery of
     destroyed assets. These charges were recorded in cost of sales ($13.0) and
     in selling, general and administrative expense ($4.9).
 
(l)  In 1995, a charge of $7.4 was recorded for severance and other
     consolidation costs relating to the combination of Best Power and existing
     General Signal facilities and a charge of $12.7 was recorded for
     transaction costs, severance and balance sheet valuation adjustments
     related to the merger with Data Switch.
 
   
(m)  During 1994, General Signal recorded $46.2 of pre-tax charges for
     consolidation of operations, asset valuations, environmental matters, and
     other issues. The charges were recorded in cost of sales ($27.7), selling,
     general and administrative expense ($16.1), and income tax expense ($2.4).
    
 
(n)  In 1994, General Signal negotiated an agreement to merge with Reliance
     Electric Company ("Reliance"). Subsequent to the consummation of the
     agreement, Reliance was acquired by another company in a cash tender offer.
     Under the terms of the merger agreement, General Signal received $50.0 for
     break-up fees and $5.2 for partial reimbursement of expenses. General
     Signal incurred $9.0 of transaction costs in connection with the merger.
 
(o)  During 1993, General Signal substantially completed the divestiture of
     Semiconductor Equipment Operations with higher than expected proceeds from
     the sale of these units and lower than expected severance costs. As a
     result, $53.2 of excess reserves were returned to operating income. General
     Signal also recognized a $5.2 charge related to previously divested
     businesses and recorded a $15.0 charge primarily for factory and
     administrative consolidation and rearrangement as well as product
     restructur-
 
                                       21
<PAGE>   33
 
            NOTES TO SELECTED HISTORICAL CONSOLIDATED FINANCIAL DATA
                         OF GENERAL SIGNAL (CONTINUED)
                                  (unaudited)
                      (in millions, except per share data)
 
     ing and realignment. Additionally, transaction and consolidation costs of
     $13.2 related to the pooling of interests merger with Revco were expensed.
 
(p)  In 1993, General Signal adopted the accrual method ("FAS 112") of
     accounting for postemployment benefits, primarily severance and long-term
     disability. The cumulative effect at January 1, 1993 of adopting FAS 112,
     $25.3, net of income taxes, was recorded as a cumulative effect of
     accounting change.
 
   
(q)  In 1993, General Signal recorded an extraordinary charge for early
     extinguishment of higher-rate debt and swap agreements of $10.7, or $6.6
     after-tax.
    
 
                                       22
<PAGE>   34
 
          SUMMARY SELECTED PRO FORMA CONDENSED COMBINED FINANCIAL DATA
                           OF SPX AND GENERAL SIGNAL
                                  (unaudited)
                      (in millions, except per share data)
 
   
     The following table presents summary selected pro forma condensed combined
statement of income and other financial data of SPX and General Signal. The
information is presented as if the Merger had occurred on January 1, 1997 for
statement of income and related data and on June 30, 1998 for balance sheet
data. The pro forma data assume that the Merger is effected by the exchange of
0.4186 of a share of SPX Common Stock and $18.00 in cash for each share of
General Signal Common Stock, whereby an aggregate of 18.227 shares of SPX Common
Stock are issued and $783.8 in cash is paid in exchange for all outstanding
shares of General Signal Common Stock. Because the General Signal stockholders
will own a majority of the outstanding shares of SPX Common Stock upon
completion of the transaction, the Merger will be accounted for as a reverse
acquisition. Accordingly, for accounting purposes, SPX is treated as the
acquired company and General Signal is considered to be the acquiring company.
The purchase price will be allocated to the assets and liabilities assumed of
SPX based on their estimated fair market values at the acquisition date. Under
reverse acquisition accounting, the purchase price of SPX is based on the fair
market value of SPX Common Stock at the date that the Merger Agreement was
signed. The cash portion of the Merger Consideration will be accounted for as a
dividend by the combined company. SPX's financial position and results of
operations will not be included in General Signal's consolidated financial
statements prior to the date the Merger is consummated. See "Pro Forma Condensed
Combined Financial Data of SPX and General Signal" for additional information
regarding this pro forma information.
    
 
   
     Under reverse acquisition accounting, the purchase price of SPX is based on
the fair market value of SPX Common Stock. For purposes of accounting for this
business combination, the fair market value of SPX Common Stock is $64.50 per
share, which was the closing price of SPX Common Stock on July 17, 1998, the
last trading date prior to the date the Merger Agreement was signed. The Merger
Consideration includes 0.4186 of a share of SPX Common Stock for each share of
General Signal Common Stock. This is a fixed exchange ratio which will not be
adjusted in the event of any increase or decrease in the market price of SPX
Common Stock. Consequently, changes in the market price of SPX Common Stock will
not impact these pro forma financial statements.
    
 
     The pro forma condensed combined financial data are intended for
information purposes, and do not purport to represent what the combined entity's
results of continuing operations or financial position would actually have been
had the transaction in fact occurred at an earlier date, or project the results
for any future date or period. Upon consummation of the Merger, the actual
financial position and results of operations of the combined company will
differ, perhaps significantly, from the pro forma amounts reflected herein due
to a variety of factors, including changes in operating results between the date
of the pro forma condensed combined financial data and the date on which the
Merger is consummated and thereafter, as well as the factors discussed under
"Risk Factors."
 
     The pro forma condensed combined balance sheet reflects the estimated costs
associated with change of control agreements and other costs associated with
closing the corporate office of General Signal. Certain other change of control
agreement costs which are triggered by the Merger and are attributable to
General Signal employees who are not affected by the corporate office closing
are also reflected in the pro forma condensed combined balance sheet. The pro
forma condensed combined income statement does not reflect a charge for these
costs as they are non-recurring and have no continuing impact. Following the
Effective Time, SPX will be finalizing its strategic review of the combined
company and its plans to integrate the operations of General Signal. The pro
forma condensed combined financial data do not give effect to any additional
integration or restructuring costs that could result from that review and the
finalization of those plans. Any additional integration and rationalization of
the operations of General Signal may include certain costs that in turn would
result in a charge to earnings of the combined company. Such a charge, which
cannot now be quantified fully, may be material and would be recognized in the
period in which such a charge occurs. The costs may include severance and
related employee benefits costs, costs to consolidate manufacturing and
 
                                       23
<PAGE>   35
 
distribution facilities, facility rearrangement costs, relocation and moving
costs, training costs, and gains or losses on business divestitures, among
others.
 
     The pro forma condensed combined financial data do not give effect to any
cost savings that could result from the combination of the companies. SPX's and
General Signal's management estimate that the combined company can achieve
approximately $55.0 to $60.0 of annualized cost savings in the first full year
following the acquisition. These cost savings include estimated annual savings
of $35.0 associated with duplicative corporate office costs, $10.0 to $15.0
associated with combining material sourcing of the combined company, and $10.0
to $15.0 of cost reductions at the General Signal business units.
 
   
     In the pro forma condensed combined financial data, SPX's and General
Signal's historical information for the six months ended June 30, 1998 were
derived from SPX's Second Quarter Form 10-Q and General Signal's Second Quarter
Form 10-Q, respectively. For SPX's and General Signal's pro forma adjusted
historical financial data for the year ended December 31, 1997, see "Pro Forma
Adjusted Historical Financial Data of SPX" and "Pro Forma Adjusted Historical
Financial Data of General Signal," respectively, wherein certain divestitures by
the respective companies are reflected as having occurred as of January 1, 1997.
    
 
   
<TABLE>
<CAPTION>
                                                            AS OF AND FOR THE      AS OF AND FOR THE
                                                               SIX MONTHS             YEAR ENDED
                                                                  ENDED              DECEMBER 31,
                                                              JUNE 30, 1998           1997(a)(b)
                                                            -----------------   -----------------------
<S>                                                         <C>                 <C>
STATEMENT OF INCOME DATA:
Revenues..................................................      $1,238.1               $ 2,500.3
Cost of products sold.....................................         840.1                 1,719.0
Selling, general and administrative expense...............         271.7                   554.5
Other operating expenses, net.............................          18.0                    34.2
Special charges and (gains)(c)............................          (7.1)                  116.5
                                                                --------               ---------
Operating income..........................................         115.4                    76.1
Other expense (income), net...............................          (1.4)                  (11.3)
Equity earnings of EGS....................................         (20.0)                  (38.8)
Interest expense, net.....................................          60.7                   103.1
                                                                --------               ---------
Income before income taxes................................          76.1                    23.1
Provision for income taxes................................          31.8                    20.2
                                                                --------               ---------
Income from continuing operations(d)......................      $   44.3               $     2.9
                                                                ========               =========
INCOME PER SHARE:
  Basic...................................................      $   1.43               $    0.09
  Diluted.................................................          1.42                    0.08
Weighted average number of common shares outstanding:
  Basic...................................................        30.893                  33.768
  Diluted.................................................        31.263                  34.319
Dividends per share(e)....................................      $     --               $    0.10
OTHER FINANCIAL DATA:
Total assets..............................................      $2,923.6               $ 2,881.1
Total debt................................................       1,526.2                 1,311.9
Stockholders' equity......................................         432.5                   572.5
Capital expenditures......................................          39.2                    69.9
Depreciation and amortization.............................          52.8                   102.6
</TABLE>
    
 
Note: The accompanying notes are an integral part of the summary selected pro
      forma condensed combined financial data.
 
                                       24
<PAGE>   36
 
        NOTES TO SUMMARY SELECTED PRO FORMA CONDENSED COMBINED FINANCIAL
                         DATA OF SPX AND GENERAL SIGNAL
                                  (unaudited)
                      (in millions, except per share data)
 
   
(a)  Pro forma information for the year ended December 31, 1997 includes the pro
     forma adjusted historical results of SPX for the year then ended which
     reflects SPX's February 1997 disposition of the Sealed Power division as if
     such disposition had occurred on January 1, 1997. See "Pro Forma Adjusted
     Historical Financial Data of SPX."
    
 
   
(b) Pro forma information for the year ended December 31, 1997 includes the pro
    forma adjusted historical results of General Signal for the year then ended
    which reflects General Signal's August 1997 disposition of GSPG and General
    Signal's September 1997 contribution of GSEG to a 47.5% owned joint venture
    as if such transactions had occurred on January 1, 1997. See "Pro Forma
    Adjusted Historical Financial Data of General Signal."
    
 
(c)  The pro forma condensed combined financial data of SPX and General Signal
     for the six months ended June 30, 1998 include SPX's special gain of $13.7
     realized on SPX's investment in Echlin Inc. which was liquidated during the
     second quarter of 1998 and $6.6 of expenses associated with SPX's offer to
     acquire Echlin Inc.
 
   
     The pro forma condensed combined financial data of SPX and General Signal
     for the year ended December 31, 1997 include special charges of $110.0
     recorded by SPX primarily to combine two divisions and to recognize reduced
     carrying value of certain assets resulting from the decision to combine the
     divisions and exit certain product lines and a $6.5 special charge recorded
     by SPX of anticipated future legal costs associated with the ongoing
     litigation with Snap-on Incorporated. See "Selected Historical Financial
     Data of SPX."
    
 
(d) The pro forma condensed combined financial data of SPX and General Signal
    reflect only results from continuing operations. SPX recorded a $10.3
    extraordinary item in the year ended December 31, 1997. General Signal
    recorded earnings from discontinued operations of $2.3 and a charge for the
    cumulative effect of accounting change of $3.7 in the year ended December
    31, 1997.
 
(e)  Represents the historical quarterly cash dividend per share of SPX for the
     periods presented. In April 1997, SPX eliminated its quarterly cash
     dividend and stated that future distributions to stockholders would be in
     the form of open market purchases of SPX Common Stock, when deemed
     appropriate by management.
 
                                       25
<PAGE>   37
 
                                  RISK FACTORS
 
     In considering whether to vote in favor of the SPX Proposal, the
stockholders of SPX should consider, and in considering whether to vote in favor
of the General Signal Proposal and in determining which form of Merger
Consideration to elect, the stockholders of General Signal should consider, in
conjunction with the other information included in this Joint Proxy
Statement/Prospectus, the following matters:
 
FIXED EXCHANGE RATIO DESPITE CHANGE IN RELATIVE STOCK PRICES
 
     The relative stock prices of the SPX Common Stock and the General Signal
Common Stock at the Effective Time of the Merger may vary significantly from the
prices as of the date of execution of the Merger Agreement, the date of this
Joint Proxy Statement/Prospectus and the date on which the SPX stockholders and
the General Signal stockholders vote on the SPX Proposal and the General Signal
Proposal, respectively, due to changes in the business, operations and prospects
of SPX or General Signal, market assessments of the likelihood that the Merger
will be consummated and the timing thereof, regulatory considerations, general
market and economic conditions and other factors.
 
   
     The exchange ratios of 0.6977 (for stockholders who elect to receive all
stock) and 0.4186 (for stockholders who elect to receive 60% of the Merger
Consideration in stock and 40% in cash) were fixed at the time of execution of
the Merger Agreement by the parties and are not subject to adjustment (except as
may result from the proration procedures under the Merger Agreement). Any
increase or decrease in the market price of the SPX Common Stock will
correspondingly increase or decrease the value of the Merger Consideration to be
received by the General Signal stockholders in the Merger (other than
stockholders receiving only cash consideration). Moreover, because the Effective
Time may occur on a date later than the Special Meetings, there can be no
assurance that the price of the SPX Common Stock on the date of the Special
Meetings will be indicative of its price at the Effective Time. Stockholders of
SPX and General Signal are urged to obtain current market quotations for the SPX
Common Stock and the General Signal Common Stock, respectively.
    
 
FEDERAL INCOME TAX CONSEQUENCES
 
   
     As conditions to the Merger (which SPX and General Signal have agreed will
not be waived), SPX must receive an opinion from its counsel, Fried, Frank,
Harris, Shriver & Jacobson, and General Signal must receive an opinion from its
counsel, Wachtell, Lipton, Rosen & Katz, that, subject to certain assumptions
set forth herein, the Merger will qualify as a reorganization pursuant to
Section 368(a) of the Code. Assuming that the Merger is a reorganization, (i) a
General Signal stockholder receiving solely SPX Common Stock in exchange for his
or her General Signal Common Stock will recognize no gain or loss as a result of
the Merger (except with respect to the receipt of cash, if any, in lieu of
fractional shares) and (ii) a General Signal stockholder receiving all cash or
cash and SPX Common Stock in exchange for his or her General Signal Common Stock
will recognize gain in the Merger, but not in excess of the amount of cash
received by such stockholder.
    
 
     Any gain recognized with respect to cash received by a General Signal
stockholder may be taxed as a dividend if such stockholder does not qualify for
"sale or exchange" treatment under Section 302 of the Code, as such provision is
applied under these circumstances. See "Certain Federal Income Tax Consequences
of the Merger," for a detailed discussion of the application of these rules to a
General Signal stockholder. Under the proration procedures described herein, a
General Signal stockholder may receive cash in the Merger even if such
stockholder elects to receive solely stock, or may receive a greater or lesser
proportion of cash than such stockholder elects to receive, and under some
circumstances, any such cash received may be taxed as a dividend.
 
                                       26
<PAGE>   38
 
LEVERAGE
 
   
     After consummation of the Merger, SPX will be more highly leveraged than is
either SPX or General Signal at present, with substantial debt service
obligations, including principal and interest obligations, with respect to
indebtedness of as much as $1.65 billion. As such, SPX may be particularly
susceptible to adverse changes in its industry, the economy and the financial
markets generally. The level of SPX's indebtedness could: (i) limit cash flow
available for general corporate purposes, such as acquisitions and capital
expenditures, because a substantial portion of SPX's cash flow from operations
must be dedicated to debt service; (ii) limit SPX's ability to obtain (or obtain
on favorable terms) additional debt financing in the future for working capital,
capital expenditures or acquisitions; (iii) limit SPX's flexibility in reacting
to competitive and other changes in the industry and economic conditions
generally; (iv) expose SPX to a risk that a substantial decrease in net
operating cash flows could make it difficult to meet debt service requirements;
and (v) expose SPX to risks inherent in interest rate fluctuations because the
new borrowings will be at variable rates of interest, which could result in
higher interest expense in the event of increases in interest rates. Moreover,
SPX's conduct of its business may be more restricted, and its ability to incur
additional debt may be more limited, than at present by restrictive covenants
which will be contained in the agreements evidencing the Merger Financing. In
particular, any debt incurrence restrictions may limit SPX's ability to service
its existing debt obligations through additional debt financing if cash flow
from operations is insufficient to service such obligations. Although the
definitive terms of the Merger Financing have not been finalized, SPX expects
that such terms will include additional operating and financial restrictions,
such as limitations on SPX's ability to incur indebtedness, create liens, sell
assets, engage in mergers or other business combinations, make investments and
pay dividends, and will require SPX to maintain certain financial ratios,
including interest coverage and leverage ratios.
    
 
   
     SPX's ability to make scheduled payments of principal of, to pay interest
on, or to refinance, its indebtedness and to satisfy its other debt obligations
will depend upon the future operating performance of SPX, which will be affected
by general economic, financial, competitive, legislative, regulatory, business
and other factors beyond its control. In addition, there can be no assurance
that future borrowings or equity financing will be available for the payment or
refinancing of SPX's indebtedness. If SPX is unable to service its indebtedness,
whether in the ordinary course of business or upon acceleration of such
indebtedness, SPX may be forced to pursue one or more alternative strategies,
such as restructuring or refinancing its indebtedness, selling assets, reducing
or delaying capital expenditures or seeking additional equity capital. There can
be no assurance that any of these strategies could be effected on satisfactory
terms, if at all.
    
 
UNCERTAINTIES IN INTEGRATING BUSINESS OPERATIONS AND ACHIEVING COST SAVINGS;
POTENTIAL CHARGES TO EARNINGS
 
   
     The success of the proposed business combination of SPX and General Signal
will in large part be dependent on the ability of SPX, following the
consummation of the Merger, to realize cost savings and, to a lesser extent, to
consolidate operations and integrate processes. The integration of businesses,
moreover, involves a number of risks, including the diversion of management's
attention to the assimilation of the operations from other business concerns,
delays or difficulties in the actual integration of operations or systems, and
challenges in retaining customers and key personnel of the acquired company.
There can be no assurance that future consolidated results will improve as a
result of the business combination of SPX and General Signal, or that the timing
or extent of the cost savings and efficiencies that are anticipated by SPX will
be achieved. The pro forma financial statements contained in this Joint Proxy
Statement/Prospectus do not include the impact, positive or negative, of any
cost savings or efficiencies related to anticipated future actions.
    
 
   
     Following the Effective Time, SPX will be finalizing its strategic review
of the combined company and its plans to integrate the operations of General
Signal. Certain portions of that review and plan have been completed and SPX has
already identified an estimated $57.4 million of after-tax costs which it
expects the combined company to incur upon or due to the Merger. These costs are
reflected in the pro forma condensed combined financial data presented herein.
See "Pro Forma Condensed Combined Financial Data of SPX and General Signal."
Additional integration and rationalization of the operations of General Signal
pursuant to
    
                                       27
<PAGE>   39
 
finalization of such review and plans may include certain costs that in turn
would result in a charge to earnings of the combined company. Such a charge,
which cannot now be quantified fully, may be material and would be recognized in
the period in which such a charge occurs. They may include severance and related
employee benefits costs, costs to consolidate manufacturing and distribution
facilities, facility rearrangement costs, relocation and moving costs, training
costs, and gains or losses on business divestitures, among others. Over the past
five years, SPX has recorded several special charges to its results of
operations associated with cost reductions and to achieve operating
efficiencies. SPX believes that its actions have been required to improve its
operations and, as described above, will, if necessary, record future charges as
appropriate to address costs and operational efficiencies at the combined
company.
 
DEPENDENCE ON KEY PERSONNEL
 
     SPX is dependent on the continued services of its management team,
including John B. Blystone, Chairman of the Board, President and Chief Executive
Officer. Although SPX believes it could replace key employees in an orderly
fashion should the need arise, the loss of such personnel could have a material
adverse effect on SPX.
 
   
     All of the unit presidents at General Signal are covered by a change of
control severance policy which provides for severance and other payments should
their employment terminate under certain circumstances after a change in control
of General Signal. See "The Merger -- Interests of Certain Persons in the
Merger." If all or a substantial number of these people were to terminate their
employment within a short time of one another, such action could have a material
adverse effect on SPX.
    
 
RELIANCE ON MAJOR CUSTOMERS OF SPX
 
   
     Sales to GM, Ford and Chrysler accounted for approximately 22%, 12% and 3%,
respectively, of SPX's revenues for the year ended December 31, 1997. Although
they will represent a significantly smaller percentage of revenues of the
combined company following the Merger, the loss of GM, Ford or Chrysler or of
any of SPX's other significant customers could have a material adverse effect on
SPX. There is substantial and continuing pressure from the major OEMs to reduce
costs, including the cost of products and services purchased from outside
suppliers such as SPX. If in the future SPX were unable to generate sufficient
cost savings to offset price reductions, SPX's gross margins could be adversely
affected.
    
 
CYCLICAL NATURE OF AUTOMOTIVE INDUSTRY
 
   
     Nearly all of SPX's operations are, and after the Merger is consummated
approximately 40% of SPX's operations will be, directly related to domestic and
foreign automotive vehicle production and vehicle service. The automotive
industry's sales and production are cyclical and can be affected by the strength
of a country's general economy. In addition, automotive production and sales can
be affected by labor relations issues, regulatory requirements, trade agreements
and other factors. A decline in automotive sales and production would likely
affect not only sales of components, tools and services to vehicle manufacturers
and their dealerships, but also sales of components, tools and services to
aftermarket customers, and could result in a decline in SPX's results of
operations or a deterioration in SPX's financial condition. If demand changes
and SPX fails to respond accordingly, its results of operations could be
adversely affected in any given quarter.
    
 
SIGNIFICANCE OF GOODWILL
 
   
     SPX will have goodwill of approximately $1.1 billion and stockholders'
equity of approximately $432.5 million at the consummation of the Merger. SPX
amortizes its goodwill on a straight-line method over the estimated periods
benefited, not to exceed 40 years. In determining the estimated useful life,
management considers the nature, competitive position, life cycle position and
historical and expected future operating income of each acquired company, as
well as SPX's commitment to support these acquired companies through continued
investment in capital expenditures, operational improvements and research and
development. After an acquisition, SPX continually reviews whether subsequent
events and circumstances have occurred that indicate the remaining estimated
useful life of goodwill may warrant revision or that the
    
 
                                       28
<PAGE>   40
 
remaining balance of goodwill may not be recoverable. If events and
circumstances indicate that goodwill related to a particular business should be
reviewed for possible impairment, SPX uses projections to assess whether future
operating income on a non-discounted basis (before goodwill amortization) of the
unit is likely to exceed the goodwill amortization over the remaining life of
the goodwill, to determine whether a write-down of goodwill to recoverable value
is appropriate. There can be no assurance that circumstances will not change in
the future that will affect the useful life or carrying value of goodwill.
 
EQUITY DILUTION OF CURRENT SPX STOCKHOLDERS
 
   
     Following the consummation of the Merger, the General Signal stockholders
immediately prior to the Effective Time will own approximately 60% of the
outstanding SPX Common Stock and the SPX stockholders immediately prior to the
Effective Time will own approximately 40% of the outstanding SPX Common Stock.
In addition, if the SPX Plan Amendment Proposal is approved, the number of
shares of SPX Common Stock available for issuance under the 1992 Plan to
employees will be increased by 1.1 million shares to 3.0 million shares. SPX may
over time issue a substantial number of these shares to employees of the
combined company, including employees of General Signal, as part of SPX's
EVA-based incentive compensation system if the Merger is consummated. SPX
believes that, while the Merger will cause a reduction of the present equity
interest of the SPX stockholders in SPX as presently constituted, it will also
result in SPX stockholders' owning shares in a much larger company with
increased value-creation opportunities.
    
 
ABSENCE OF DIVIDENDS
 
     General Signal historically has paid a regular quarterly dividend. Pursuant
to the Merger Agreement, General Signal has agreed not to pay dividends prior to
the Effective Time. In April 1997, SPX eliminated its quarterly cash dividend
and stated that future distributions to stockholders would be in the form of
open market purchases of SPX Common Stock when deemed appropriate by management,
and SPX does not anticipate that this policy will change. There can be no
assurance that distributions to stockholders will be permitted under SPX's new
credit and other debt agreements.
 
YEAR 2000 COSTS
 
     SPX. SPX utilizes software and related computer technologies essential to
its operations and to certain products that use two digits rather than four to
specify the year, which could result in a date recognition problem with the
transition to the year 2000. In 1997, SPX established a plan, utilizing both
internal and external resources, to assess the potential impact of the year 2000
problem on SPX's systems and operations and to implement solutions to address
this issue. SPX has essentially completed the assessment phase of its year 2000
plan, and is continuing to survey its suppliers and service providers for year
2000 compliance. SPX's target completion date for correction of critical systems
is December 31, 1998 and its plan is to conduct testing of corrected systems in
1999. Third party compliance and other factors could adversely affect these
goals. SPX does not believe that the costs to remediate software and computer
technologies for the year 2000 problem will exceed $5.0 million over the next
two years, which does not include the costs to replace certain existing systems.
SPX is in the process of implementing a new enterprise resource planning system
across its Service Solutions business. SPX estimates that it will spend
approximately $10.0 million to acquire and install this new system over the next
two years. There can be no assurances that the costs of remediation and testing
will not be material. Moreover, there can be no assurances that SPX will not
experience material unanticipated costs and/or business interruption due to year
2000 problems in its internal systems, its supply chain or from customer product
migration issues.
 
     General Signal. Based on a recent assessment, General Signal determined
that it will be required to undertake projects to modify or replace significant
portions of its software so that its computer systems will properly utilize
dates beyond December 31, 1999. These projects will provide General Signal with
numerous benefits only one of which is becoming year 2000 compliant. The
implementation or remediation plans are in various stages of completion. While
total expenditures related to these programs have not been finalized, General
Signal estimates, on a preliminary basis, that $8.0 million will be charged to
expense in 1998 related to these programs and a similar amount will be expensed
in 1999. General Signal presently believes that with
                                       29
<PAGE>   41
 
these modifications, the year 2000 issue will not pose significant operational
problems for its computer systems. General Signal has started to communicate
with its significant suppliers to determine the extent to which its interface
systems are vulnerable to those third parties' failure to remediate their own
year 2000 issues. However, there can be no guarantee that the systems of other
companies on which General Signal's systems rely will be timely converted and
would not have an adverse effect on General Signal's systems. General Signal is
also exploring whether it has any exposure to contingencies related to the year
2000 issue for the products it has sold. The above information is based on best
estimates of General Signal's management, which were derived utilizing numerous
assumptions of future events, including the continued availability of certain
resources, third party modification plans and other factors. However, there can
be no guarantee that these estimates will be achieved and actual results could
differ materially from those anticipated. Specific factors that might cause such
material differences include, but are not limited to, the availability and cost
of personnel trained in this area, the ability to locate and correct all
relevant computer codes and similar uncertainties.
 
ENVIRONMENTAL LIABILITIES
 
   
     SPX. SPX's operations and properties are subject to federal, state, local
and foreign regulatory requirements relating to environmental protection. It is
SPX's policy to comply fully with applicable environmental requirements. SPX
established an ongoing environmental compliance auditing program in 1989. Based
on current information, SPX believes that its operations are in substantial
compliance with applicable environmental laws and regulations, and SPX is not
aware of any violation that will have a material adverse effect on its business,
financial condition, or results of operations. There can be no assurance,
however, that currently unknown matters, new laws and regulations, or stricter
interpretations of existing laws and regulations will not materially affect
SPX's business or operations in the future.
    
 
     General Signal. General Signal is involved in various stages of
investigation and remediation relative to environmental matters at properties
currently or formerly owned or operated by General Signal or at third-party
owned waste disposal sites arising in connection with internal investigations,
legal or administrative proceedings or the purchase or sale of facilities or
operations. General Signal has a comprehensive environmental compliance program
which includes environmental audits conducted by internal and outside
independent environmental professionals and regular communications with General
Signal's operating units regarding environmental compliance requirements and
anticipated regulations.
 
     General Signal has been notified that it is a potentially responsible party
and has received other notices of potential liability pursuant to various
federal and state environmental laws (including, without limitation, the federal
Comprehensive Environmental Response, Compensation and Liability Act of 1980 and
similar state laws) at approximately 70 third-party owned sites. Such laws may
impose liability on certain classes or persons that are considered jointly and
severally liable for the costs of investigation and remediation of hazardous
substances present at such sites, regardless of fault or the legality of the
original disposal. These persons include the present or former owner or operator
of a facility and companies that generated, disposed of, or arranged for the
disposal of, such hazardous substances. General Signal has resolved its
liability by entering into de minimis settlements or other buyout agreements
with governmental authorities or other parties at 32 of these sites and believes
that it has no liability with respect to 16 of these sites. General Signal
believes, based on information currently available, that its aggregate probable
remaining liability at the 22 other sites is less than $3.0 million and has
reserved approximately that amount on its books. In addition to the
aforementioned third-party owned sites, General Signal is engaged in
investigation and/or remedial activities at, and has received notice of alleged
contamination with respect to, various of its currently or formerly owned sites
and has reserved approximately $19.0 million in connection therewith.
 
     The potential costs related to the matters described above and the possible
impact on future operations are uncertain due in part to the complexity of
government laws and regulations and their interpretations, the varying costs and
effectiveness of clean-up technologies, the uncertain level of insurance or
other types of recovery and the degree of General Signal's responsibility.
Accordingly, there can be no assurance that General Signal will not incur
expenditures in excess of the amounts reserved for such matters.
 
                                       30
<PAGE>   42
 
     In addition to the foregoing, certain of the current or former facilities
of General Signal have been in operation for several decades and, over such
time, have used or generated and disposed of substances that are or may be
considered hazardous. Certain of these facilities are located on properties that
had been used for various industrial purposes prior to General Signal's
occupancy. As a result of the Merger, additional subsurface investigations will
be required following the Merger in order to assess the nature and scope of
potential soil and groundwater conditions at certain of these facilities. It is
possible that such investigations will identify additional soil and groundwater
contamination which, if present, could be material.
 
ANTI-TAKEOVER EFFECTS OF CERTAIN CHARTER, BY-LAW AND STATUTORY PROVISIONS
 
   
     Certain provisions of SPX's Certificate of Incorporation and By-Laws may
inhibit changes in control of SPX not approved by the SPX Board. These
provisions include: (i) a staggered board of directors; (ii) a prohibition on
stockholder action through written consents; (iii) a requirement that special
meetings of stockholders be called only by the SPX Board; (iv) advance notice
requirements for stockholder proposals and nominations; (v) limitations on the
ability of stockholders to amend, alter or repeal the By-Laws; (vi) enhanced
voting requirements for certain business combinations involving substantial
stockholders; and (vii) the authority of the SPX Board to issue, without
stockholder approval, preferred stock with such terms as the SPX Board may
determine. SPX is also afforded the protections of Section 203 of the Delaware
General Corporation Law, which could have similar effects. See "Comparison of
Rights of Stockholders of SPX and General Signal."
    
 
                                       31
<PAGE>   43
 
                              THE SPECIAL MEETINGS
 
GENERAL
 
   
     This Joint Proxy Statement/Prospectus is furnished in connection with the
solicitation by the Board of Directors of each of SPX and General Signal of
proxies to be used at the respective Special Meetings and at any and all
adjournments of the respective Special Meetings.
    
 
   
     SPX. The SPX Special Meeting will be held on Monday, October 5, 1998, at
10:00 a.m. (Eastern Time), at the offices of Fried, Frank, Harris, Shriver &
Jacobson, One New York Plaza, 27th Floor, New York, New York. The purpose of the
SPX Special Meeting is to consider and vote upon (i) the SPX Proposal, namely,
to approve the issuance of SPX Common Stock to the General Signal stockholders
in exchange for their shares of General Signal Common Stock in the Merger, and
(ii) the SPX Plan Amendment Proposal, namely, to approve the amendment of the
1992 Stock Plan to increase the number of shares of SPX Common Stock available
for issuance thereunder by 1.1 million to 3.0 million. On August 28, 1998, there
were 43,549,020 shares of General Signal Common Stock issued and outstanding
(exclusive of Restricted Shares). Assuming no additional issuances of General
Signal Common Stock prior to the Effective Time, the number of shares of SPX
Common Stock issuable upon consummation of the Merger is approximately
18,229,620.
    
 
   
     General Signal. The General Signal Special Meeting will be held on Monday,
October 5, 1998, at 10:00 a.m. (Eastern Time), at General Signal's headquarters,
One High Ridge Park, Stamford, Connecticut. The purpose of the General Signal
Special Meeting is to consider and vote upon the General Signal Proposal,
namely, to approve and adopt the Merger Agreement.
    
 
RECORD DATE; QUORUM AND REQUIRED VOTE
 
   
     SPX. Only those persons who are holders of record of shares of SPX Common
Stock at the close of business on August 28, 1998, the SPX Record Date, are
entitled to vote at the SPX Special Meeting. As of the SPX Record Date, there
were 12,352,077 shares of SPX Common Stock outstanding. Each share of SPX Common
Stock is entitled to one vote. Under SPX's By-Laws, the holders of one-third of
the shares of SPX Common Stock outstanding and entitled to vote must be present
in person or represented by proxy at the SPX Special Meeting in order for a
quorum to be present. However, pursuant to the rules of the NYSE, on which the
SPX Common Stock is listed, approval of the SPX Proposal and the SPX Plan
Amendment Proposal will require that the total number of votes cast represent
more than 50% of the outstanding shares of SPX Common Stock entitled to vote
thereon at the SPX Special Meeting and that the respective proposals be approved
by the affirmative vote of the holders of a majority of the votes cast at the
SPX Special Meeting. An abstention with respect to the SPX Proposal or the SPX
Plan Amendment Proposal, as the case may be, will have the same effect as a vote
cast against such proposal. Brokers who hold shares of SPX Common Stock as
nominees will not have discretionary authority to vote such shares in the
absence of instructions from the beneficial owners thereof. "Broker non-votes"
or any other failure to vote (other than an abstention) on the SPX Proposal or
the SPX Plan Amendment Proposal will not be counted as votes cast on such
proposal and will have no effect on the outcome of the vote on such proposal.
See "The Special Meetings -- Proxies."
    
 
   
     As of the SPX Record Date, the directors and executive officers of SPX and
their affiliates owned an aggregate of approximately 2.9% of the outstanding
shares of SPX Common Stock. Each of the directors and executive officers of SPX
has advised SPX that he or she plans to vote or to direct the vote of all shares
of SPX Common Stock owned by him or her in favor of the SPX Proposal.
    
 
   
     General Signal. Only holders of record of shares of General Signal Common
Stock at the close of business on August 28, 1998, the General Signal Record
Date, are entitled to vote at the General Signal Special Meeting. As of the
General Signal Record Date, there were 43,709,142 shares of General Signal
Common Stock outstanding. Each share of General Signal Common Stock is entitled
to one vote. The presence, whether in person or by proxy, of holders of a
majority of the total number of outstanding shares of General Signal Common
Stock will constitute a quorum for the transaction of business at the General
Signal Special Meeting. The affirmative vote of the holders of two-thirds of all
votes entitled to be cast by the holders of General Signal Common Stock is
required to approve the General Signal Proposal. Brokers who hold shares
    
 
                                       32
<PAGE>   44
 
of General Signal Common Stock as nominees will not have discretionary authority
to vote such shares in the absence of instructions from the beneficial owners
thereof. Abstentions, broker non-votes or any other failure to vote on the
General Signal Proposal will have the same effect as a vote cast against the
General Signal Proposal. See "The Special Meetings -- Proxies."
 
   
     As of the General Signal Record Date, the directors and executive officers
of General Signal and their affiliates owned an aggregate of approximately 0.4%
of the outstanding shares of General Signal Common Stock. Each of the directors
and executive officers of General Signal has advised General Signal that he or
she plans to vote or to direct the vote of all shares of General Signal Common
Stock owned by him or her in favor of the General Signal Proposal.
    
 
PROXIES
 
   
     All shares of SPX Common Stock represented by properly executed proxies
received prior to or at the SPX Special Meeting, and not duly and timely
revoked, and all shares of General Signal Common Stock represented by properly
executed proxies received prior to or at the General Signal Special Meeting, and
not duly and timely revoked, will be voted in accordance with the instructions
indicated on such proxies. If no instructions are indicated on a properly
executed returned proxy, such proxy will be voted "FOR" the approval of the SPX
Proposal and the SPX Plan Amendment Proposal or the General Signal Proposal, as
the case may be.
    
 
   
     A properly executed proxy marked "ABSTAIN," although counted for purposes
of determining whether there is a quorum and for purposes of determining the
aggregate voting power and number of shares that are present and entitled to
vote at the applicable Special Meeting, will not be voted in favor of or against
the SPX Proposal or the SPX Plan Amendment Proposal. Accordingly, since the
affirmative vote of the holders of a majority of the votes cast at the SPX
Special Meeting is required for approval of the SPX Proposal and the SPX Plan
Amendment Proposal, respectively, a proxy marked "ABSTAIN" with respect to such
proposal will have the effect of a vote against such proposal. Similarly, since
the affirmative vote of two-thirds of all shares of General Signal Common Stock
outstanding and entitled to vote is required for approval of the General Signal
Proposal, a proxy marked "ABSTAIN" will have the effect of a vote against the
General Signal Proposal. IN ACCORDANCE WITH NYSE RULES, BROKERS AND NOMINEES WHO
HOLD SHARES OF STOCK IN THEIR NAMES BUT ARE NOT THE BENEFICIAL OWNERS OF SUCH
SHARES ARE PRECLUDED FROM EXERCISING THEIR VOTING DISCRETION WITH RESPECT TO
SUCH SHARES. THUS, BROKERS AND NOMINEES ARE NOT EMPOWERED TO VOTE SHARES OF SPX
COMMON STOCK OR GENERAL SIGNAL COMMON STOCK HELD BY THEM WITH RESPECT TO THE
APPROVAL OF THE SPX PROPOSAL AND THE SPX PLAN AMENDMENT PROPOSAL OR THE GENERAL
SIGNAL PROPOSAL, AS THE CASE MAY BE, ABSENT SPECIFIC INSTRUCTIONS FROM THE
BENEFICIAL OWNERS OF SUCH SHARES. Shares represented by "broker non-votes" are
not considered shares "entitled to vote," and, accordingly, "broker non-votes"
will have no effect on the outcome of the vote on the SPX Proposal or the SPX
Plan Amendment Proposal, but, because such shares are outstanding, "broker
non-votes" will have the effect of a vote against the General Signal Proposal. A
failure to return a properly executed proxy will have no effect on the outcome
of the vote on the SPX Proposal or the SPX Plan Amendment Proposal but will have
the effect of a vote against the General Signal Proposal (unless the stockholder
attends the Special Meeting and votes his or her shares in person in favor of
the General Signal Proposal).
    
 
     Any person executing a proxy card may revoke it prior to its exercise by
filing with the Secretary of SPX or General Signal, as the case may be, prior to
the applicable Special Meeting at the address specified in the last paragraph of
"Available Information" or at the applicable Special Meeting, either an
instrument revoking the proxy or a duly executed proxy bearing a later date.
Attendance at the SPX Special Meeting or the General Signal Special Meeting will
not in and of itself constitute revocation of a proxy.
 
     Neither the SPX Board nor the General Signal Board are currently aware of
any business to be transacted at the SPX Special Meeting and the General Signal
Special Meeting, respectively, other than as described herein. If, however,
other matters are properly brought before the SPX Special Meeting or the General
Signal Special Meeting, or any adjournments or postponements thereof, the
persons respectively appointed as proxies will have discretion to vote or act
thereon according to their judgment. Such
 
                                       33
<PAGE>   45
 
   
adjournments may be for the purpose of soliciting additional proxies. Shares
represented by proxies voting against the approval of the SPX Proposal or the
SPX Plan Amendment Proposal, on the one hand, or the General Signal Proposal, on
the other hand, will be voted against a motion to adjourn the respective Special
Meeting for the purpose of soliciting additional proxies with respect to the
relevant proposal.
    
 
   
GENERAL SIGNAL CONFIDENTIAL VOTING POLICY
    
 
   
     Pursuant to General Signal's confidential voting policy, if a stockholder
of General Signal requests confidentiality on the proxy card or ballot, the
stockholder meeting proxies, ballots and voting tabulations that identify the
particular vote of the stockholder will be held permanently confidential except
as necessary to meet applicable legal requirements. The tabulators and
inspectors of election for the General Signal Special Meeting are employees of
First Chicago Trust Company of New York and are, therefore, independent. General
Signal has an agreement with the tabulators and inspectors of election requiring
them to comply with General Signal's confidential voting policy.
    
 
SOLICITATION OF PROXIES
 
     In addition to the use of the mail, arrangements will be made with
brokerage houses and other custodians, nominees and fiduciaries to send proxy
material to the beneficial owners of stock held of record by such persons, and
SPX and General Signal will, upon request, reimburse their respective
stockholders for their reasonable expenses in so doing. SPX and General Signal
each have retained D.F. King & Co., Inc. to aid in the solicitation of proxies
and to verify certain records related to the solicitation at a fee of $7,500 and
$15,000, respectively, plus out-of-pocket costs and expenses. To the extent
necessary in order to ensure sufficient representation at its Special Meeting,
SPX or General Signal may request by telephone, facsimile or telegram the return
of proxy cards. The extent to which this will be necessary depends upon how
promptly proxy cards are returned. Stockholders are urged to send in their
proxies without delay. Employees of SPX and General Signal may solicit proxies
for which no additional compensation will be paid.
 
NO DISSENTERS' RIGHTS
 
     No holder of SPX Common Stock or General Signal Common Stock will have any
dissenters' rights in connection with, or as a result of, the matters to be
acted upon at the Special Meetings.
 
                                       34
<PAGE>   46
 
                                 THE COMPANIES
 
   
     SPX. SPX is a global provider of Vehicle Service Solutions to franchised
dealers of motor vehicle manufacturers and independent service locations,
Service Support to vehicle manufacturers and Vehicle Components to the worldwide
motor vehicle industry.
    
 
     SPX is comprised of two business segments. The Service Solutions segment
includes operations that primarily design, manufacture and market a wide range
of specialty service tools, equipment and services to the global motor vehicle
industry. Major customers are franchised dealers of motor vehicle manufacturers,
aftermarket vehicle service facilities and independent distributors. The Vehicle
Components segment includes operations that primarily design, manufacture and
market transmission and steering components for light-and heavy-duty vehicle
markets, principally in North America and Europe. Major customers of this
segment include vehicle manufacturers, other component manufacturers and the
aftermarket.
 
     SPX was organized in 1911 under the laws of Michigan and reincorporated in
Delaware in 1968. SPX was known as The Piston Ring Company until 1931, when it
changed its name to Sealed Power Corporation. In 1988, it changed its name again
to SPX Corporation. Today SPX is a multinational corporation with operations in
14 countries.
 
     SPX's corporate headquarters are located at 700 Terrace Point Drive,
Muskegon, Michigan 49443-3301, telephone number (616) 724-5000.
 
   
     General Signal. General Signal, incorporated in New York in 1904, is a
manufacturer of equipment for the Process Controls, Electrical Controls and
Industrial Technology industries. General Signal's key Process Controls industry
products include mixers; valves for municipal water supply and wastewater
treatment and for pulp, paper, food, pharmaceutical and chemical manufacturing;
ultra low-temperature freezers for life science research, and furnaces. For the
Electrical Controls industry, key products include uninterruptible power supply
equipment, power transformers and fire detection systems. Products serving the
Industrial Technology industry include auto and bicycle components, data
networking equipment and fare collection and vending equipment.
    
 
     During the last five years, General Signal invested approximately $394.4
million in cash and 4.4 million shares of General Signal Common Stock to acquire
12 businesses and/or product lines. Additionally, during the last five years,
General Signal disposed of four units, two of which were accounted for as
discontinued operations. In September 1997, General Signal contributed the net
assets of GSEG to EGS, a joint venture with Emerson's Appleton Electric
operations.
 
     General Signal's corporate headquarters are located at One High Ridge Park,
Stamford, Connecticut 06904-2010, telephone number (203) 329-4100.
 
     MergerSub. MergerSub is a wholly owned subsidiary of SPX, incorporated in
Delaware in 1998 for the sole purpose of effecting transactions such as those
contemplated by the Merger Agreement. MergerSub has no assets or liabilities
other than those arising out of the Merger Agreement. Prior to the consummation
of the Merger, MergerSub will not engage in any activity other than activities
related to the transactions contemplated by the Merger Agreement. MergerSub's
principal executive offices are located at 700 Terrace Point Drive, Muskegon,
Michigan 49443-3301, telephone number (616) 724-5000.
 
                                       35
<PAGE>   47
 
                                   THE MERGER
 
GENERAL
 
   
     At the Effective Time, General Signal will be merged with and into
MergerSub and thereby become a wholly owned subsidiary of SPX. In the Merger,
each share of General Signal Common Stock issued and outstanding immediately
prior to the Effective Time, without any action on the part of the holder
thereof, will be converted into the right to receive, at the election of the
stockholder but subject to the limitations and proration procedures described in
this Joint Proxy Statement/Prospectus and as set forth in the Merger Agreement,
EITHER (i) 0.6977 of a share of SPX Common Stock, OR (ii) $45.00 in cash,
without interest, OR (iii) 0.4186 of a share of SPX Common Stock and $18.00 in
cash, without interest. Each share of SPX Common Stock issued to holders of
General Signal Common Stock in the Merger will be issued together with the
associated SPX Right. See "Comparison of Rights of Stockholders of SPX and
General Signal -- Stockholder Rights Plans" for a description of the SPX Rights.
Cash will be paid in lieu of fractional shares of SPX Common Stock. The Merger
will become effective at the Effective Time when the Certificates of Merger have
been filed with the Secretary of State of the State of Delaware and the
Department of State of the State of New York or at such later time as may be
agreed upon by SPX and General Signal and specified in the Certificates of
Merger.
    
 
     The shares of SPX Common Stock to be issued to the General Signal
stockholders in the Merger will constitute approximately 60% of the SPX Common
Stock outstanding immediately following the Merger, and the SPX stockholders
immediately prior to the Merger will hold approximately 40% of the SPX Common
Stock outstanding immediately following the Merger.
 
BACKGROUND OF THE MERGER
 
   
     In connection with its annual strategic review, during the fall of 1997
General Signal's management took steps to improve General Signal's strategic
positioning and to explore its strategic alternatives. These steps included the
announcement of an effort to focus management attention on certain operational
core competencies and the streamlining of General Signal's portfolio of units by
retaining businesses for which those core competencies would have the most
benefit. In addition, General Signal retained Lazard Freres, as its investment
banker, to contact a select group of strategic and financial parties to explore
the possibility and feasibility of entering into a business combination
transaction which would enhance stockholder value. After preliminary discussions
with several parties, General Signal determined that no such transactions were
likely with the selected group and terminated the process by the end of
November. After receiving unsolicited inquiries in the spring of 1998 regarding
possible business combination transactions, General Signal again held
preliminary discussions with a limited number of other potential strategic
partners regarding a business combination, but none of such discussions advanced
past the preliminary stages.
    
 
   
     On June 11, 1998, members of SPX's senior management and Lazard Freres met
at SPX's corporate offices, where they discussed, among other things, the
possibility of a potential business combination between SPX and General Signal.
Based on this discussion, a meeting was arranged on June 24 among John B.
Blystone, Chairman, President and Chief Executive Officer of SPX, Patrick
O'Leary, Vice President -- Finance, Treasurer and Chief Financial Officer of
SPX, and Michael D. Lockhart, Chairman, President and Chief Executive Officer of
General Signal, at which, with representatives of Lazard Freres in attendance,
Messrs. Blystone and Lockhart discussed their respective businesses and the
possible benefits to stockholder value that could be produced by combining the
two companies. The parties executed customary non-disclosure agreements, dated
as of June 24, 1998, allowing for the exchange of confidential information
between the companies, and commenced due diligence.
    
 
     On June 30, 1998, members of General Signal's senior management met with
members of SPX's senior management to exchange operational and financial
information and to continue their respective due diligence investigations of one
another. The respective due diligence investigations continued through July 19.
On July 7, Messrs. Lockhart and Blystone met to discuss the financial terms and
other aspects of a proposed transaction, though no definitive agreements were
reached.
 
                                       36
<PAGE>   48
 
     On July 8, 1998, the General Signal Board held a special meeting at which
Mr. Lockhart updated the directors on the status of the discussions and meetings
with SPX. Following discussion of the strategic rationale of a business
combination with SPX and General Signal's strategic alternatives, the General
Signal Board authorized management to continue its negotiations with and due
diligence of SPX. At about that time, Mr. Blystone started acquainting the
members of the SPX Board with the opportunity of the potential acquisition and
gained consensus that the management of SPX should continue to evaluate a
possible combination with General Signal on an expedited basis. On July 8, 1998,
SPX retained Stern Stewart to perform a detailed valuation analysis and, if
needed, to provide a fairness opinion with respect to a potential business
combination of SPX with General Signal.
 
   
     On July 13, 1998, members of the respective senior managements of General
Signal and SPX met, together with Lazard Freres and the two companies'
respective accounting and legal advisors, to make due diligence presentations to
one another, to exchange additional financial and business information, and to
discuss certain issues relevant to determining the appropriate structure of a
proposed combination. From July 13 through July 19, General Signal, SPX and
their respective advisors continued their due diligence investigations of the
other party. Also during this period, General Signal's and SPX's legal
representatives drafted and negotiated the Merger Agreement, and representatives
of the respective senior managements of General Signal and SPX negotiated the
financial terms of the Merger.
    
 
   
     On July 17, 1998, the General Signal Board held a special meeting to review
the proposed transaction with SPX. Representatives of General Signal's senior
management and General Signal's legal advisors and investment banker held
discussions and made presentations regarding the business and strategic
rationales for the proposed transaction, the proposed terms of the transaction,
certain legal considerations and an update on the status of the negotiations
with SPX. On July 19, the General Signal Board held a special meeting to
consider and vote upon the proposed Merger. At this meeting, representatives of
General Signal's senior management and General Signal's legal advisors and
investment banker reviewed, among other things, the matters set forth under
"Reasons for the Merger -- Recommendations of the Boards," including the terms
of the proposed Merger and the provisions contained in the draft Merger
Agreement. In addition, at this meeting, Lazard Freres rendered its oral
opinion, subsequently confirmed in writing, that, as of July 19, 1998, the
aggregate consideration to be received by the General Signal stockholders in the
Merger is fair to the General Signal stockholders from a financial point of
view. Following further discussion and consideration, the General Signal Board
unanimously approved and authorized the execution of the Merger Agreement.
    
 
   
     On July 17, 1998, the SPX Board held a special meeting, in the course of
which the SPX Board received an update on the status of negotiations, reviewed
the strategic and financial implications of the possible transaction with
General Signal, and heard a presentation by Stern Stewart as to its preliminary
findings that the transaction was fair to SPX and the methodologies used by it
in arriving at that conclusion. On July 19, 1998, the SPX Board held a special
meeting. At that meeting, senior management of SPX reviewed the strategic and
operational synergies of the transaction, SPX's legal advisors reviewed the
terms of the definitive Merger Agreement with the SPX Board, and Stern Stewart
rendered its oral opinion, subsequently confirmed in writing, that, as of July
19, 1998, the aggregate consideration to be paid by SPX in the Merger was fair
to SPX from a financial point of view.
    
 
     On July 19, 1998, following final approval by the General Signal Board and
the SPX Board, each company executed and delivered the Merger Agreement. On July
20, 1998, the parties issued a joint press release announcing the Merger.
 
REASONS FOR THE MERGER; RECOMMENDATIONS OF THE BOARDS
 
     Reasons for the Merger -- SPX
 
     At a telephonic meeting on July 19, 1998, the SPX Board, by unanimous vote
of those present (one director having been unable to attend the Board meeting),
approved the Merger Agreement and the transactions contemplated thereby,
including the Merger, and resolved to recommend that the SPX stockholders
approve the SPX Proposal.
 
                                       37
<PAGE>   49
 
     In reaching its determination, the SPX Board consulted with SPX's
management, as well as its financial and legal advisors, and considered the
following material factors:
 
     The SPX Board considered that the addition of General Signal's businesses
to SPX would result in a balance of industrial and vehicle solutions businesses
and would provide SPX with a new growth platform from which to increase
stockholder value. The SPX Board viewed General Signal as a strong candidate for
application of SPX's EVA-based management techniques that have contributed to
significantly increased stockholder value at SPX since January 1996. The SPX
Board believed that General Signal's businesses, many of which are first or
second in their markets or strong niche players, are strategically positioned
for operational improvement and growth, much like the operational improvement
and growth that has taken place in SPX's businesses since January 1996.
 
     The SPX Board believed that the SPX EVA-based management approach and the
historical success at SPX of business reorganizations, operational improvements,
strategic acquisitions and divestitures, organic growth and financial strategies
since January 1996 would be equally successful in generating value in General
Signal's businesses. The SPX Board considered the following:
 
     - the potential cost savings that could be created by combining the
       respective businesses of SPX and General Signal, as well as the
       operational improvements resulting from business reorganization and
       reengineering and the sharing of best practices between businesses;
 
     - the potential for margin improvement, improved operating capital
       utilization, and EVA improvement resulting from a full implementation of
       an EVA-based management and incentive system in a fashion similar to the
       implementation of EVA at SPX that began in January 1996 and that
       currently includes approximately 80% of SPX employees;
 
     - the prospects for driving both organic growth and growth through
       acquisition by developing focused global growth strategies for General
       Signal's core businesses in a similar fashion to SPX's growth from the
       recent acquisitions of IBS Filtran, Jatek, A.R. Brasch Marketing, The
       Valley Forge Group, Tecnotest and Toledo Trans-Kit;
 
     - the potential for more efficient financial capital utilization through
       the implementation of SPX's EVA-disciplined financial policies to target
       an optimal capital structure and to eliminate cash dividends; and
 
     - the potential for creating stockholder value through strategic
       divestitures of General Signal businesses similar to the methodology used
       by SPX in its divestiture of Hy-Lift in 1996 and Sealed Power in early
       1997.
 
     In addition to the foregoing, the SPX Board considered the results of
financial analyses as to the effect of the Merger on SPX's earnings and EVA.
 
     The Board further considered the presentations of Stern Stewart, which was
the originator of EVA as a financial management technique and which had acted as
consultant to senior management of SPX in introducing and implementing an
EVA-based program at SPX, and Stern Stewart's opinion that the aggregate
consideration to be paid by SPX in the Merger was fair to SPX from a financial
point of view.
 
     The foregoing discussion sets forth the material information and factors
considered and given weight by the SPX Board. In view of the variety of factors
considered in connection with its evaluation of the Merger, the SPX Board did
not find it practicable or necessary to and did not quantify or otherwise assign
relative weights to the specific factors considered in reaching its
determination. In addition, individual members of the SPX Board may have given
different weights to different factors.
 
   
     THE SPX BOARD BY UNANIMOUS VOTE OF THOSE PRESENT (ONE DIRECTOR HAVING BEEN
UNABLE TO ATTEND THE BOARD MEETING) HAS DETERMINED THAT THE MERGER AGREEMENT AND
THE TRANSACTIONS CONTEMPLATED THEREBY, INCLUDING THE MERGER, ARE FAIR TO AND IN
THE BEST INTERESTS OF SPX AND ITS STOCKHOLDERS. ACCORDINGLY, THE SPX BOARD
RECOMMENDS THAT STOCKHOLDERS OF SPX VOTE "FOR" APPROVAL OF THE SPX PROPOSAL.
    
 
                                       38
<PAGE>   50
 
     Reasons for the Merger -- General Signal
 
   
     The General Signal Board has unanimously determined that the Merger is
advisable and fair to, and in the best interests of, General Signal and its
stockholders and has approved the Merger Agreement. In particular, the General
Signal Board believes that the Merger provides the General Signal stockholders
with an opportunity to receive for their shares of General Signal Common Stock a
substantial premium over the values that a stand-alone strategy could reasonably
be expected to produce. In addition, the form of the Merger Consideration in the
aggregate provides the General Signal stockholders with immediate cash value for
a portion of their shares while also providing them the opportunity to
participate, as holders of SPX Common Stock, in a larger, more diversified
company with strong prospects for stockholder value enhancement in the future.
In this regard, the General Signal Board considered that each General Signal
stockholder will have the opportunity to select a form of Merger Consideration
most closely aligned with his or her investment objectives from among three
alternatives: all cash, all SPX Common Stock, or a combination of cash and SPX
Common Stock, subject to the proration procedures described elsewhere in this
Joint Proxy Statement/Prospectus.
    
 
     In addition to the foregoing, in reaching its decision to approve the
Merger Agreement and to recommend that the General Signal stockholders vote to
approve and adopt the Merger Agreement, the General Signal Board considered the
following material factors:
 
          (i) the General Signal Board's expectation of SPX's financial
     performance following the Merger, taking into account, among other things:
 
          -- the business, operations, financial condition, operating results
             and prospects of General Signal and of SPX,
 
          -- the potential for cost saving that could be created by combining
             the respective businesses of SPX and General Signal, and the
             potential initial costs that could be incurred by SPX to achieve
             such cost savings, and
 
          -- SPX's expected post-Merger capital structure and the accounting
             treatment of the Merger;
 
          (ii) the historical trading prices of the General Signal Common Stock,
     on the one hand, and the SPX Common Stock, on the other, including the
     significant price appreciation of the SPX Common Stock since Mr. Blystone
     became Chairman, President and Chief Executive Officer of SPX;
 
          (iii) the fact that the per share consideration to be received by the
     General Signal stockholders in the Merger represented, as of July 19, 1998,
     a substantial premium over the market prices of the General Signal Common
     Stock prevailing prior to the announcement of the signing of the Merger
     Agreement;
 
          (iv) the form of the Merger Consideration, which (1) in the aggregate
     provides the General Signal stockholders with immediate cash value for a
     portion of their shares while also providing them the opportunity to
     participate, as holders of SPX Common Stock, in a larger, more diversified
     company of which General Signal would become a significant part, and (2)
     permits individual stockholders to elect from among cash, SPX Common Stock,
     or a combination thereof (subject, in all cases, to proration) as the form
     of the consideration to be received for their shares of General Signal
     Common Stock;
 
          (v) the potential stockholder value that could be expected to be
     generated from the various strategic alternatives available to General
     Signal, including the alternative of remaining independent (with or without
     selling, spinning-off or otherwise disposing of one or more of its business
     units), as well as the results of the contacts and preliminary discussions
     held by General Signal's senior management from time to time with third
     parties regarding possible business combinations;
 
   
          (vi) the presentation by Lazard Freres with respect to the Merger and
     the opinion of Lazard Freres as to the fairness, from a financial point of
     view, of the aggregate Merger Consideration to be received by the General
     Signal stockholders in the Merger (see "The Merger -- Opinion of General
     Signal's Investment Banker");
    
 
                                       39
<PAGE>   51
 
          (vii) the terms of the Merger Agreement, all of which were the
     products of extensive arm's length negotiations, including, without
     limitation, the following:
 
          -- the form and amount of the Merger Consideration,
 
          -- the representations and warranties made by SPX with respect to its
             business, operations and financial condition,
 
          -- the expense reimbursement and termination fee provisions requiring
             General Signal or SPX, as the case may be, to compensate the other
             party in certain circumstances in the event the Merger Agreement is
             terminated, and
 
          -- the nature and relatively limited number of conditions to the
             obligations of SPX to consummate the Merger (including, in
             particular, the absence of a financing condition), which the
             General Signal Board believes increases the likelihood that the
             Merger will be consummated if approved by stockholders;
 
          (viii) the absence of any significant regulatory impediments and the
     corresponding likelihood that the Merger will be consummated; and
 
          (ix) the fact that the portion of the aggregate Merger Consideration
     to be received by the General Signal stockholders in the form of SPX Common
     Stock would not be taxable for United States federal income tax purposes to
     the stockholders receiving such consideration.
 
     The foregoing discussion addresses all of the material information and
factors considered by the General Signal Board in its consideration of the
Merger. In view of the variety of factors and the amount of information
considered, the General Signal Board did not find it practicable to and did not
make specific assessments of, quantify or otherwise assign relative weights to
the specific factors considered in reaching its determination. The determination
was made after consideration of all of the factors as a whole. In addition,
individual members of the General Signal Board may have given different weights
to different factors. For a discussion of the interests of certain members of
General Signal's management and the General Signal Board in the Merger, see "The
Merger -- Interests of Certain Persons in the Merger."
 
   
     THE GENERAL SIGNAL BOARD HAS UNANIMOUSLY DETERMINED THAT THE MERGER IS
ADVISABLE AND FAIR TO, AND IN THE BEST INTERESTS OF, GENERAL SIGNAL AND ITS
STOCKHOLDERS AND HAS APPROVED THE MERGER AGREEMENT. ACCORDINGLY, THE GENERAL
SIGNAL BOARD UNANIMOUSLY RECOMMENDS THAT STOCKHOLDERS OF GENERAL SIGNAL VOTE
"FOR" APPROVAL AND ADOPTION OF THE MERGER AGREEMENT AT THE GENERAL SIGNAL
SPECIAL MEETING.
    
 
OPINION OF SPX'S FINANCIAL ADVISOR
 
     Stern Stewart has acted as financial advisor to SPX in connection with the
Merger. At the July 19, 1998 meeting of the SPX Board, Stern Stewart delivered
its oral opinion to the SPX Board, subsequently confirmed in a written opinion
dated July 19, 1998, to the effect that based upon and subject to various
considerations set forth in such opinion, as of July 19, 1998, the aggregate
Merger Consideration to be paid in the acquisition of General Signal is fair to
SPX from a financial point of view.
 
   
     THE FULL TEXT OF THE STERN STEWART OPINION, WHICH SETS FORTH THE
ASSUMPTIONS MADE, PROCEDURES FOLLOWED, MATTERS CONSIDERED, AND LIMITATIONS ON
AND SCOPE OF THE REVIEW BY STERN STEWART IN RENDERING THE STERN STEWART OPINION,
IS ATTACHED TO THIS JOINT PROXY STATEMENT/PROSPECTUS AS APPENDIX B AND IS
INCORPORATED BY REFERENCE HEREIN. THE STERN STEWART OPINION IS DIRECTED ONLY TO
THE FAIRNESS OF THE CONSIDERATION TO BE PAID BY SPX CORPORATION FROM A FINANCIAL
POINT OF VIEW, HAS BEEN PROVIDED TO THE SPX BOARD IN CONNECTION WITH ITS
EVALUATION OF THE MERGER, DOES NOT ADDRESS ANY OTHER ASPECT OF THE MERGER AND
DOES NOT CONSTITUTE A RECOMMENDATION TO ANY HOLDER OF SPX COMMON STOCK AS TO HOW
TO VOTE AT THE SPX SPECIAL MEETING. THE SUMMARY OF THE STERN STEWART OPINION SET
FORTH
    
                                       40
<PAGE>   52
 
IN THIS JOINT PROXY STATEMENT/PROSPECTUS IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO THE FULL TEXT OF SUCH OPINION. HOLDERS OF SPX COMMON STOCK ARE
URGED TO READ THE STERN STEWART OPINION CAREFULLY AND IN ITS ENTIRETY.
 
   
     In connection with its opinion, Stern Stewart: (i) reviewed certain
publicly available financial statements and other information of General Signal
and SPX, (ii) reviewed certain financial projections for General Signal and SPX,
including estimates of certain potential benefits of the proposed business
combination, prepared by the management of SPX, in consultation with General
Signal (the "SPX Management Projections"), (iii) discussed the past and current
operations, financial condition and prospects of General Signal and SPX with
management of SPX, (iv) reviewed the reported prices and historical trading
activity of the General Signal Common Stock and the SPX Common Stock, (v)
compared the financial performance and condition of General Signal and SPX and
the reported prices and trading activity of the General Signal Common Stock and
the SPX Common Stock with those of certain other comparable publicly traded
companies, (vi) reviewed publicly available information regarding the financial
terms of certain comparable transactions, in whole or in part, to the Merger,
(vii) reviewed the Merger Agreement, and (viii) performed such other analyses as
Stern Stewart deemed appropriate for purposes of arriving at and preparing the
Stern Stewart Opinion.
    
 
     Stern Stewart relied, without independent verification, upon the accuracy
and completeness of all of the financial and other information that was
furnished or otherwise communicated to Stern Stewart by SPX. With respect to
financial forecasts and projections provided by SPX, Stern Stewart assumed that
such financial forecasts and projections were reasonably prepared on bases
reflecting the best available estimates and good faith judgment of SPX's
management as to the future financial and other performance of General Signal
and SPX, as applicable. Stern Stewart expresses no view as to, and assumes no
responsibility for, such projections or the assumptions on which they are based.
Stern Stewart further assumed that obtaining any necessary regulatory or
third-party approvals for the transactions contemplated by the Merger Agreement
will not have an adverse effect on General Signal or SPX, as applicable. Stern
Stewart did not make an independent evaluation or appraisal of the assets and
liabilities of General Signal or SPX or any of their respective subsidiaries and
Stern Stewart was not furnished with any such evaluation or appraisal. The Stern
Stewart Opinion was necessarily prepared and delivered based on economic, market
and other conditions as in effect on, and the information made available to
Stern Stewart as of, July 19, 1998. Although subsequent developments may affect
the Stern Stewart Opinion, Stern Stewart does not have any obligation to update,
revise, or reaffirm its opinion. Stern Stewart did not express any opinion as to
what the value of the SPX Common Stock actually will be when issued to the
General Signal stockholders pursuant to the Merger or the prices at which the
SPX Common Stock will trade after the Merger.
 
   
     The forecasts or projections furnished to Stern Stewart for General Signal
and SPX were prepared by the management of SPX, in consultation with General
Signal. As a matter of policy, SPX and General Signal do not publicly disclose
internal management forecasts, projections, or estimates of the type furnished
to Stern Stewart in connection with its analysis of the Merger, and such
forecasts, projections, and estimates were not prepared with a view towards
public disclosure. These forecasts, projections, and estimates were based on
numerous variables and assumptions which are inherently uncertain and which may
not be within the control of the management of General Signal and SPX,
including, without limitation, general economic, regulatory and competitive
conditions. Accordingly, actual results could vary materially from those set
forth in such forecasts, projections, and estimates.
    
 
     The following is a summary of certain of the financial analyses used by
Stern Stewart believed by it to be material in connection with providing its
oral opinion (subsequently confirmed in writing) to the SPX Board on July 19,
1998.
 
     Historical Stock Trading Analysis. Stern Stewart reviewed the historical
trading prices for the General Signal Common Stock, the SPX Common Stock, and
the relationship between movements of the General Signal Common Stock and the
SPX Common Stock and movements in the common stock of selected peers in the
electrical equipment industry (the "Peer Companies") and in the S&P 500 Index.
The Peer Companies used in the analysis were Cooper Industries, Inc., Emerson,
Honeywell Inc., Hubbell Incorporated, Magnetek,

                                       41
<PAGE>   53
 
Inc., and Rockwell International Corporation. The analysis indicated that for
the prior year, five years, and ten years ended July 10, 1998, the total return
to the General Signal stockholders, including dividends, significantly
underperformed both the portfolio of Peer Companies and the S&P 500. The total
return to the General Signal stockholders, including dividends, for the prior
year through July 10, 1998 was -24.6%, whereas the Peer Companies returned 7.5%
to their stockholders and the S&P 500 appreciated 30.3%. The compound annual
return to the General Signal stockholders, including dividends, for the prior
five years through July 10, 1998 was 4.9%, whereas the compound annual returns
of the Peer Companies and the S&P 500 were 16.5% and 24.0%, respectively. The
compound annual return to the General Signal stockholders, including dividends,
for the prior ten years through July 10, 1998 was 6.5%, whereas the compound
annual returns of the Peer Companies and the S&P 500 were 16.7% and 18.9%,
respectively.
 
     Stern Stewart also compared the implied price per share to be paid pursuant
to the Merger Agreement of $45.00 ("Implied Price Per Share") with the closing
stock price of the General Signal Common Stock on July 17, 1998 (the last
trading day before the public announcement of the Merger Agreement) of $37.63.
The Implied Price Per Share to be paid pursuant to the Merger Agreement
represented a 19.6% premium to the closing price of the General Signal Common
Stock on July 17, 1998. Stern Stewart also compared the Implied Price Per Share
to be paid for the General Signal Common Stock pursuant to the Merger Agreement
of $45.00, and the closing price of the General Signal Common Stock on July 17,
1998 of $37.63, with the 52 week high of $53.00 and the 52 week low of $35.69
per share of General Signal Common Stock. Stern Stewart also compared the
closing stock price of the SPX Common Stock on July 17, 1998 of $64.50 with the
52 week high of $79.06 and the 52 week low of $49.50 per share of SPX Common
Stock. Stern Stewart reviewed analyst and market expectations for General
Signal's predicted stock price performance over the next twelve months. The
median expected twelve month stock price increase according to research analyst
reports was $10.00.
 
     Peer Companies Analysis. Stern Stewart reviewed and compared certain actual
and estimated financial information relating to General Signal to corresponding
financial information, ratios, and public market multiples for the Peer
Companies. The selected Peer Companies were chosen because they are publicly
traded companies with operations that, for the purposes of this analysis, may be
considered similar to those of General Signal. Stern Stewart calculated and
compared various financial multiples and ratios for General Signal and each of
the Peer Companies. The multiples and ratios of the Peer Companies were
calculated using closing market prices on July 10, 1998, publicly reported
financial results, and publicly available information and estimates.
 
     Stern Stewart considered for the Peer Companies the total enterprise value
(defined as equity value (share price times latest reported total shares
outstanding) plus debt, preferred stock, and minority interests) ("Enterprise
Value") as a multiple of last reported book value (defined as book value of
equity plus book value of debt) ("Book Value"), latest twelve months ("LTM")
sales, LTM earnings before interest and taxes ("EBIT"), and LTM earnings before
interest, taxes, depreciation, and amortization ("EBITDA"). Stern Stewart's
analysis for the Peer Companies indicated multiples of Enterprise Value to Book
Value which ranged from 1.9x to 3.6x, with a median of 2.6x, compared to 2.1x
for General Signal; multiples of Enterprise Value to LTM sales which ranged from
0.6x to 2.3x, with a median of 1.6x, compared to 1.0x for General Signal;
multiples of Enterprise Value to LTM EBIT which ranged from 9.0x to 14.4x, with
a median of 13.2x, compared to 9.3x for General Signal; and multiples of
Enterprise Value to LTM EBITDA which ranged from 6.0x to 11.6x, with a median of
9.5x, compared to 7.1x for General Signal. Stern Stewart also considered for the
Peer Companies the total market capitalization (defined as share price times
latest reported total shares outstanding) as a multiple of LTM earnings ("Price
to Earnings"). Stern Stewart's analysis for the Peer Companies indicated a range
of Price to Earnings multiples of 15.8x to 23.4x, with a median of 20.6x,
compared to 12.9x for General Signal.
 
     Stern Stewart then applied the median multiples of the Peer Companies to
the SPX Management Projections for General Signal for fiscal year 1998 to arrive
at a range of imputed equity values per share. Stern Stewart also calculated the
aforementioned multiples based upon the total consideration contemplated for
General Signal (calculated as (i) the Implied Price Per Share times the number
of General Signal shares
 
                                       42
<PAGE>   54
 
outstanding plus (ii) total assumed debt) ("Total Consideration"), and
determined that the multiples were below the median of Peer Companies.
 
   
     Stern Stewart calculated Net Operating Profit After Tax ("NOPAT") for the
Peer Companies and General Signal on an LTM basis. Stern Stewart calculated the
LTM EVA (defined as (i) NOPAT less (ii) average capital times the cost of
capital) for the Peer Companies and General Signal, and estimated the market's
expectation of future growth in EVA ("Growth Value") inherent in stock prices as
of July 10, 1998. Stern Stewart then analyzed Growth Value as a percentage of
Enterprise Value ("Growth Value Percentage") for the Peer Companies, and
compared it to General Signal's Growth Value Percentage. The Growth Value
Percentage for the Peer Companies ranged from 24.6% to 59.5%, with a median of
46.5%, as compared to General Signal's Growth Value Percentage of 24.6%. Stern
Stewart then analyzed the Growth Value Percentage of General Signal based on the
Total Consideration, and determined that the implied Growth Value Percentage was
also considerably below the Peer Company median of 46.5%.
    
 
   
     Cost of Capital. In estimating the weighted average cost of capital
("WACC"), Stern Stewart performed analyses consistent with the Capital Asset
Pricing Model. Stern Stewart performed regressions of the Peer Companies, other
selected companies, and General Signal's stock against the S&P 500 Index to
arrive at a peer portfolio beta ("Peer Beta"). The Peer Beta was unlevered
according to the industry average debt to market value (defined as (i) total
debt divided by (ii) total debt plus market value of equity), and relevered for
the pro-forma leverage of the proposed combined entity following the Merger to
arrive at an estimate of General Signal's beta ("General Signal's Beta"). Stern
Stewart's estimate of General Signal's Beta was compared with, and found to be
comparable to, other publicly available estimates. Stern Stewart's estimate of
General Signal's Beta was multiplied by market risk premiums ("MRP") of 5.0% to
6.0%, representing the long-term average return of equities over risk-free
assets. At an MRP of 5.0%, General Signal's cost of equity capital was estimated
to be 11.5%; at an MRP of 6.0%, General Signal's cost of equity capital was
estimated to be 12.7%. Based on General Signal's current Standard & Poor's bond
rating of "A", and a pro forma analysis of leverage and coverage ratios of the
combined entity, the cost of debt capital was estimated. The WACC was then
calculated as an average of the cost of equity capital and the cost of debt
capital, weighted according to their respective market values. At an MRP of
5.0%, the WACC was estimated to be 8.9%; at an MRP of 6.0%, the WACC was
estimated to be 9.6%.
    
 
     Comparison of Historical Performance and SPX Management Projections. Stern
Stewart analyzed General Signal's historical financial performance for the
fiscal years 1988 through 1997, and compared historical performance to financial
performance as predicted in the SPX Management Projections for fiscal years 1998
through 2007. Stern Stewart analyzed EBIT and EBITDA margins, accounts
receivable days-on-hand, inventory days-on-hand, accounts payable and accrued
expenses days-on-hand, and property, plant and equipment turns, of General
Signal historically from fiscal years 1988 through 1997, and compared them with
the SPX Management Projections for General Signal for the fiscal years 1998
through 2007. Stern Stewart also compared General Signal's historical income
statements (expressed as a percentage of total sales) and balance sheets
(expressed as a percentage of total assets) for fiscal years 1988 through 1997
with those statements based on the SPX Management Projections for fiscal years
1998 through 2007.
 
     EVA and Discounted Cash Flow Valuations. Stern Stewart used its proprietary
EVA framework in performing discounted EVA and discounted EVA improvement
valuations of the General Signal Common Stock based on the SPX Management
Projections. Stern Stewart also performed a discounted cash flow ("DCF")
valuation of the General Signal Common Stock based on the SPX Management
Projections. In performing its EVA and DCF analyses, Stern Stewart considered
various assumptions that it deemed appropriate based on a review with the
management of SPX of General Signal's prospects and risks. Stern Stewart
believed it appropriate to utilize various discount rates ranging from 8.9% to
9.6%, and terminal value inflation rates of 0% to 3% to apply to fiscal year
2007 forecasted EVA and free cash flow.
 
     Based on the foregoing, Stern Stewart performed analyses, without giving
effect to any cost savings or synergies as a result of the Merger, which yielded
a range of net present values. Stern Stewart also discussed and reviewed with
SPX's management potential cost savings and synergies as a result of the Merger,
and valued such cost savings and synergies, which were based on SPX Management
Projections. Including such
 
                                       43
<PAGE>   55
 
cost savings and synergies in the EVA and DCF valuations, Stern Stewart
estimated a range of values for the General Signal Common Stock. Based on the
SPX Management Projections, Stern Stewart also performed EVA and DCF valuations
of SPX on a stand-alone basis and of the proposed combined entity.
 
     In its EVA improvement valuation, Stern Stewart calculated current
operations value (defined as (i) current EVA divided by cost of capital plus
(ii) total EVA capital) ("Current Operations Value"), Growth Value, and
Enterprise Value (calculated here as Current Operations Value plus Growth Value)
of General Signal based on the SPX Management Projections both with and without
projected cost savings and synergies. Stern Stewart then calculated the Growth
Value Percentages implicit in the SPX Management Projections with and without
projected synergies and cost savings to be 37.4% and 45.0%, respectively. The
Growth Value Percentages implicit in the SPX Management Projections were below
the Peer Companies median of 46.5%. Stern Stewart performed similar Growth Value
analyses of SPX on a stand-alone basis and of the proposed combined entity.
 
     Selected Transactions Analysis. Stern Stewart analyzed certain information
relating to seven comparable merger and acquisition transactions in the
electrical equipment industry from April 1996 to February 1998 ("Comparable
Transactions"). The analyses indicated, among other things, that the multiples
of transaction value to LTM sales ranged from 1.0 to 3.1, with a median of 1.3;
the multiples of transaction value to LTM EBIT ranged from 11.3 to 70.8, with a
median of 13.3; and the multiples of transaction value to LTM EBITDA ranged from
8.4 to 23.6, with a median of 10.0. At the Total Consideration, multiples of the
transaction value to LTM sales, LTM EBIT, and LTM EBITDA of General Signal were
below the median for the Comparable Transactions.
 
     Company and Industry Research. Stern Stewart reviewed recent research
analyst reports and other publicly available information on General Signal, SPX,
and the electrical equipment and automotive components industries. Stern Stewart
reviewed analyst and market expectations for General Signal's predicted stock
price performance over the next twelve months, for earnings per share ("EPS")
and net income for fiscal years 1998 and 1999. The median expected twelve month
stock price increase according to research analyst reports was $10.00. Stern
Stewart also compared the analyst expectations for EPS growth of General Signal
in fiscal years 1998 and 1999 with EPS growth calculated according to the SPX
Management Projections. The median expected growth in EPS through the fiscal
year 1999 was 12% according to analyst forecasts, which compared to 12% growth
in EPS according to the SPX Management Projections.
 
     The preparation of a fairness opinion is a complex process and is not
necessarily susceptible to partial analysis or summary description. Selecting
portions of the analyses or of the summary set forth above, without considering
the analyses as a whole, could create an incomplete view of the processes
underlying the Stern Stewart Opinion. In arriving at its fairness determination,
Stern Stewart considered the results of all such analyses, taken as a whole.
Furthermore, in arriving at its fairness opinion, Stern Stewart did not
attribute any particular weight to any analysis or factor considered by it;
rather, Stern Stewart made its determination as to fairness on the basis of
qualitative judgments as to the significance and relevance of the financial and
comparative analyses and factors described above, taken as a whole. No company
or transaction used in the above analyses as a comparison is identical to
General Signal or SPX or the contemplated transaction. The analyses were
prepared solely for purposes of Stern Stewart in providing its opinion to the
SPX Board as to the fairness of the aggregate consideration to be paid in the
Merger, from a financial point of view, to SPX and do not purport to be
appraisals or necessarily reflect the prices at which businesses or securities
actually may be bought or sold. Analyses based upon forecasts of future results
are not necessarily indicative of actual future results, which may be
significantly more or less favorable than suggested by such analyses. Because
such analyses are inherently subject to uncertainty, being based upon numerous
factors or events beyond the control of the parties or their respective
advisors, none of SPX, General Signal, Stern Stewart or any other person assumes
responsibility if future results are materially different from those forecast.
 
     As described above, Stern Stewart's opinion to the SPX Board was one of
many factors taken into consideration by the SPX Board in making its
determination to approve the Merger Agreement. Although Stern Stewart evaluated
the fairness to SPX of the aggregate consideration to be paid by SPX in the
Merger, the specific consideration was determined by SPX and General Signal
through arm's-length negotiation. The
 
                                       44
<PAGE>   56
 
foregoing summary does not purport to be a complete description of the analyses
performed by Stern Stewart and is qualified by reference to the written opinion
of Stern Stewart set forth in Appendix B hereto.
 
   
     As part of its financial advisory consulting practice, Stern Stewart is
regularly engaged in the evaluation of businesses and their securities in
connection with mergers and acquisitions, divestitures, valuations,
restructurings and recapitalizations. Stern Stewart was selected by SPX as its
financial advisor based on Stern Stewart's reputation, experience, and
expertise. In the past, Stern Stewart has provided financial consulting services
to SPX for which services Stern Stewart has received customary fees. In
addition, Mr. Blystone, Chairman, President and Chief Executive Officer of SPX,
is a member of the Board of Advisors of Stern Stewart's EVA Institute.
    
 
   
     Pursuant to the terms of a letter agreement dated July 8, 1998 (the "Stern
Stewart Engagement Letter"), Stern Stewart was retained by SPX as its financial
advisor and to render an opinion to the SPX Board with respect to the Merger.
Under the Stern Stewart Engagement Letter, SPX agreed to pay Stern Stewart a fee
of $750,000, payable upon the delivery of the Stern Stewart Opinion and the
execution of the Merger Agreement. In the event that the Merger Agreement had
not been executed, SPX would have been obligated to pay Stern Stewart a fee of
$250,000, payable at such time as the negotiations between SPX and General
Signal to effect the transaction were terminated. In addition, SPX has agreed to
reimburse Stern Stewart for its reasonable out-of-pocket expenses incurred in
connection with the engagement and to indemnify Stern Stewart and certain
related persons and entities for certain losses, claims, damages or liabilities
relating to or arising out of, among other things, its engagement as financial
advisor.
    
 
OPINION OF GENERAL SIGNAL'S INVESTMENT BANKER
 
   
     General Signal retained Lazard Freres to act as its investment banker in
connection with the Merger based on its expertise and reputation and its
familiarity with General Signal. At the July 19 meeting of the General Signal
Board, Lazard Freres rendered its oral opinion to the General Signal Board,
subsequently confirmed in writing, to the effect that, as of July 19, 1998, the
aggregate Merger Consideration is fair to the holders of shares of General
Signal Common Stock from a financial point of view.
    
 
   
     A copy of the full text of the written opinion of Lazard Freres, dated July
19, 1998, which sets forth the assumptions made, matters considered and limits
on the review undertaken, is attached hereto as Appendix C and is incorporated
herein by reference. General Signal stockholders are urged to read this opinion
in its entirety. This summary of the opinion of Lazard Freres is qualified in
its entirety by reference to the full text of the opinion. The engagement of
Lazard Freres and its opinion are for the benefit of the General Signal Board in
connection with its consideration of the Merger. Lazard Freres's opinion is
directed only to the fairness of the aggregate Merger Consideration to the
holders of General Signal Common Stock from a financial point of view and does
not address any other aspect of the Merger. The opinion is not intended to and
does not constitute a recommendation to any holder of General Signal Common
Stock as to whether such stockholder should vote for the Merger or with regard
to any election of alternative forms of Merger Consideration.
    
 
   
     In connection with rendering its opinion to the General Signal Board,
Lazard Freres, among other things: (i) reviewed the financial terms and
conditions of the Merger Agreement; (ii) analyzed certain historical business
and financial information relating to General Signal and SPX; (iii) reviewed
various financial forecasts and other data provided by General Signal and SPX
relating to their respective businesses; (iv) held discussions with members of
the senior managements of General Signal and SPX with respect to the businesses
and prospects of General Signal and SPX, respectively, the strategic objectives
of each, and the possible benefits which might be realized following the Merger;
(v) reviewed public information with respect to certain other companies in lines
of businesses believed by Lazard Freres to be generally comparable to the
businesses of General Signal and SPX; (vi) reviewed the financial terms of
certain business combinations involving companies in lines of businesses
believed by Lazard Freres to be generally comparable to those of General Signal
and SPX, and in other industries generally; (vii) reviewed the historical stock
prices and trading volumes of the General Signal Common Stock and the SPX Common
Stock; and (viii) conducted such other financial studies, analyses and
investigations as Lazard Freres deemed appropriate.
    
 
                                       45
<PAGE>   57
 
   
     Lazard Freres relied upon the accuracy and completeness of the financial
and other information reviewed by it for the purpose of its opinion and did not
assume any responsibility for any independent verification of such information
or any independent valuation or appraisal of any of the assets or liabilities of
General Signal or SPX, or concerning the solvency of, or other related solvency
issues with respect to, either of the foregoing entities. Lazard Freres assumed
that the financial forecasts provided to it, including the potential benefits
projected to be realized following the Merger, were reasonably prepared on bases
reflecting the best currently available estimates and judgments of the
management of General Signal and SPX as to the future financial performance of
General Signal and SPX, respectively. Lazard Freres assumed no responsibility
for, and expressed no view as to, such forecasts or the assumptions on which
they were based, and there cannot be any assurance that the actual results of
General Signal and SPX will not differ materially from those reflected in the
forecasts. In addition, Lazard Freres did not express any opinion as to the
prices at which the SPX Common Stock may trade following the date of its
opinion. Lazard Freres's opinion also was necessarily based on accounting
standards and economic, monetary, market and other conditions as in effect on,
and information made available to Lazard Freres as of, the date of its opinion.
In rendering its opinion, Lazard Freres assumed that the Merger would be
consummated on the terms described in the Merger Agreement, without any waiver
of any material terms or conditions by General Signal, that the Merger would be
accounted for as a reverse acquisition, and that obtaining the necessary
regulatory approvals for the Merger would not have an adverse effect on General
Signal or SPX.
    
 
   
     The following is a summary of certain of the analyses performed by Lazard
Freres in connection with rendering its opinion dated July 19, 1998 as to the
fairness of the aggregate Merger Consideration to be received by the holders of
General Signal Common Stock from a financial point of view and discussed with
the General Signal Board in connection with rendering such opinion.
    
 
   
     Comparable Publicly Traded Companies Analyses. Lazard Freres reviewed and
compared certain publicly available actual and projected financial, operating
and stock market information of companies in lines of business believed to be
comparable to those of General Signal and SPX. Lazard Freres noted that,
although there were no public companies with precisely the same mix of
businesses and financial conditions as General Signal or SPX, Lazard Freres
believed the most relevant comparable companies to General Signal to include
Aeroquip-Vickers Inc., Crane Co., Eaton Corporation, Mark IV, Pentair Inc.,
United Dominion Industries and U.S. Industries (the "General Signal Comparable
Companies") and to SPX to include After-Market Technology, Cooper Tire & Rubber,
Exide Corporation, Federal Mogul, Goodyear Tire & Rubber, Snap-on Incorporated,
Standard Motors Products and Stanley Works (the "SPX Comparable Companies" and,
together with the General Signal Comparable Companies, the "Comparable
Companies").
    
 
   
     This analysis indicated that for the General Signal Comparable Companies
(i) market capitalization (a) as a multiple of LTM EBITDA ranged from 6.6x to
9.7x, as compared to 8.9x for General Signal in the Merger (based upon the
closing price per share of SPX Common Stock of $64.50 as of July 17, 1998, the
last trading day prior to the public announcement of the Merger); and (b) as a
multiple of projected 1998 EBITDA ranged from 6.1x to 8.2x, as compared to a
multiple for General Signal in the Merger that was slightly above such range,
and (ii) price to earnings ("P/E") multiples (a) based on LTM EPS ranged from
11.7x to 19.3x, as compared to 17.5x for General Signal in the Merger; and (b)
based on projected 1998 EPS ranged from 11.1x to 17.5x, as compared to a
multiple for General Signal in the Merger that was within such range.
    
 
     This analysis also indicated that for the SPX Comparable Companies (i)
market capitalization (a) as a multiple of LTM EBITDA ranged from 5.9x to 15.8x,
as compared to 10.2x for SPX; and (b) as a multiple of projected 1998 EBITDA
ranged from 5.6x to 9.8x, as compared to 9.0x for SPX; and (ii) P/E multiples
(a) based on LTM EPS ranged from 12.5x to 29.4x, as compared to 17.3x for SPX;
and (b) based on projected 1998 EPS ranged from 10.6x to 26.1x, as compared to
16.3x for SPX.
 
     As noted above, no company used in the public market valuation analysis is
identical to General Signal or SPX. Accordingly, any analysis of the value of
the General Signal Common Stock and the SPX Common Stock based on the Comparable
Companies involves complex considerations and judgments concerning
 
                                       46
<PAGE>   58
 
differences in potential financial and operating characteristics of the
Comparable Companies and other factors in relation to the trading and
acquisition values of the Comparable Companies.
 
   
     Selected Precedent Transactions Analysis. Lazard Freres reviewed and
analyzed certain selected publicly available financial, operating and stock
market information relating to certain acquisition transactions involving
diversified industrial companies (the "Diversified Selected Transactions") and
to certain acquisition transactions involving automotive components and after
market companies (the "Automotive Selected Transactions" and, together with the
Diversified Selected Transactions, the "Selected Transactions"). Lazard Freres
noted that the reasons for, and the circumstances surrounding, each of the
transactions analyzed were diverse and the characteristics of the companies
involved were not directly comparable to General Signal, SPX or the Merger.
    
 
   
     Lazard Freres performed an analysis that indicated for the Diversified
Selected Transactions that (i) the ratio of the enterprise value to LTM EBITDA
ranged from 6.5x to 10.0x, as compared to 8.9x for the Merger; (ii) the ratio of
the enterprise value to LTM EBIT ranged from 8.9x to 16.3x, as compared to 11.5x
for the Merger; (iii) the ratio of price paid for each share of the acquired
business to LTM EPS ranged from 9.1x to 20.5x, as compared to 17.5x for the
Merger; and (iv) the premium paid for the acquired business to its share price
on the date one month prior to the date of announcement of the relevant
transaction ranged from 12.9% to 26.1% (excluding one transaction at 165.4%), as
compared to 24.8% for the Merger. The value to be received in the Merger
represented a premium of 24.8% over the closing price per share of General
Signal Common Stock on July 16, 1998. Lazard Freres also performed an analysis
of premiums paid in transactions announced since January 1, 1998 with a value in
excess of $1 billion. Such analysis indicated a mean and median premium paid of
31.5% and 22.7%, respectively, over the market price on the trading day
immediately prior to the date of the public announcement of the relevant
transaction.
    
 
   
     This analysis also indicated for the Automotive Selected Transactions that
(i) the ratio of the enterprise value to LTM EBITDA ranged from 7.4x to 19.9x;
(ii) the ratio of the enterprise value to LTM EBIT ranged from 11.1x to 19.5x;
and (iii) the ratio of price paid for each share of the acquired business to LTM
EPS ranged from 15.0x to 39.2x.
    
 
   
     Discounted Cash Flow Analysis. Lazard Freres analyzed the present value of
General Signal's projected cash flow for the years 1999 through 2003, inclusive,
and the projected 2003 terminal values based upon a range of multiples of
projected 2003 EBITDA and upon a range of free cash flow perpetual growth rates.
Lazard Freres performed such analysis based on General Signal's management
projections for both a management case and a case that assumed a constant EBITDA
margin. Lazard Freres applied discount rates ranging from 10.0% to 11.0%,
terminal multiples of EBITDA ranging from 6.5x to 7.5x and free cash flow
perpetual growth rates of approximately 3.0%.
    
 
   
     Lazard Freres also analyzed the present value of SPX's projected cash flow
for the years 1999 through 2003, inclusive, and the projected 2003 terminal
values based upon a range of multiples of projected 2003 EBITDA and upon a range
of free cash flow perpetual growth rates. Lazard Freres performed such analysis
based on SPX management's projections for the years 1999 and 2000 and
extrapolations therefrom for the years 2001 through 2003. Lazard Freres applied
discount rates ranging from 10.0% to 11.0%, terminal multiples of EBITDA ranging
from 7.5x to 8.5x and free cash flow perpetual growth rates of approximately
3.5%.
    
 
   
     Leveraged Buy-Out Analysis. Lazard Freres prepared an analysis based on
projections provided to it by General Signal's management and on the
then-current economic and market conditions as to the consideration a leveraged
buy-out purchaser might be able to pay to acquire General Signal. A range of
possible acquisition prices was derived by reviewing the estimated return on
equity investment that would result from a leveraged buy-out based upon various
assumptions, including the financial ratios required by the bank financing and
high yield debt markets, interest rates, and certain cost savings.
    
 
   
     Leveraged Share Repurchase Analysis. Lazard Freres considered possible
pre-tax values which might result if General Signal were to pursue a leveraged
recapitalization without the investment of any additional equity by new
investors or otherwise. Based upon General Signal management projections and
employing
    
 
                                       47
<PAGE>   59
 
   
assumptions regarding the credit markets similar to those used in the leveraged
buy-out analysis above, a repurchase of General Signal Common Stock at a cash
price of $44 per share of General Signal Common Stock financed by new debt was
reviewed. This methodology indicated that between approximately 37% and 48% of
the outstanding General Signal Common Stock might be repurchased depending upon
the level of leverage following such repurchase. Lazard Freres performed this
analysis assuming the remaining shares of General Signal Common Stock were
valued using multiples ranging from 6.5x to 7.5x of General Signal's EBITDA,
assuming a share of General Signal Common Stock received a pro rata portion of
the cash, and taking into account the additional debt resulting from the share
repurchase.
    
 
   
     Historical Stock Price Review. Lazard Freres reviewed information regarding
historical price and trading volume for the General Signal Common Stock. As part
of this review, the forward P/E multiple for the General Signal Common Stock was
compared to that for the Standard & Poor's 400 Index based on daily closing
prices from October 2, 1995 through July 16, 1998. This review showed that the
multiple applied to the General Signal Common Stock was significantly lower than
that of the S&P 400 Index, with the current P/E multiple for the General Signal
Common Stock being approximately 13.3x and the current P/E multiple for the S&P
400 Index being approximately 28.9x. Lazard Freres noted that while the P/E
multiple for General Signal ranged from approximately 13.0x to 15.0x during this
period, the P/E multiple for the S&P 400 Index grew from approximately 17.0x to
29.0x during the same period. Lazard Freres also reviewed the historical stock
prices of the General Signal Common Stock and compared such prices to those for
the S&P 400 Index. Such comparison indicated that the General Signal Common
Stock significantly underperformed the S&P 400 Index over the one-year period
prior to the public announcement of the Merger. It also was noted that (i) the
26-week trading range for General Signal Common Stock was from a closing low of
$35.875 per share of General Signal Common Stock on July 2, 1998 to a closing
high of $46.875 per share of General Signal Common Stock on March 30, 1998; and
(ii) the 52-week trading range for General Signal Common Stock was from a
closing low of $35.875 per share of General Signal Common Stock on July 2, 1998
to a closing high of $52.375 per share of General Signal Common Stock on July
17, 1997.
    
 
   
     Pro Forma Has/Gets Analysis. Lazard Freres calculated the effect that the
Merger could have on the forecast earnings per share of General Signal Common
Stock in General Signal on a stand-alone basis before the Merger as compared to
the forecast earnings per share of General Signal Common Stock in the pro forma
combined company following the Merger. This analysis was based on projections
provided by the respective managements of General Signal and SPX and on the
assumptions described above, including the realization of the potential benefits
following the Merger.
    
 
   
     This analysis indicated that the Merger would result in accretion to pro
forma earnings per share of General Signal Common Stock and pro forma earnings
per share of SPX Common Stock in 1999 and significant accretion to pro forma
earnings per share of General Signal Common Stock and pro forma earnings per
share of SPX Common Stock thereafter. In this analysis, Lazard Freres assumed
that both General Signal and SPX would perform in accordance with the forecasts
provided to Lazard Freres by General Signal's and SPX's managements. The actual
results achieved by the combined company following the Merger may vary from
projected results and the variations may be material.
    
 
   
     Special Considerations. The preparation of a fairness opinion is a complex
process and not necessarily susceptible to partial analysis or summary
description. Selecting portions of the analyses or the summary set forth above,
without considering the analyses as a whole, could create an incomplete or a
misleading view of the process underlying the opinion of Lazard Freres. No
company or transaction used in the analyses as a comparison is identical to
General Signal or SPX or the transaction contemplated by the Merger Agreement.
The analyses were prepared solely for the purpose of Lazard Freres providing its
opinion to the General Signal Board in connection with its consideration of the
Merger and do not purport to be appraisals or to reflect the prices at which
businesses or securities actually may be sold, which may be significantly more
or less favorable than as set forth in the analyses. Similarly, any estimate of
values or forecast of future results contained in the analyses is not
necessarily indicative of actual values or actual future results, which may be
significantly more or less favorable than suggested by such analyses.
    
 
                                       48
<PAGE>   60
 
   
     In performing its analyses, Lazard Freres made numerous assumptions with
respect to industry performance, general business and economic conditions and
other matters. Because such analyses are inherently subject to uncertainty,
being based upon numerous factors or events beyond the control of General Signal
or SPX or their respective advisors, none of General Signal, SPX, Lazard Freres
or any other person assumes responsibility if future results or actual values
are materially different from those forecasts or estimates contained in the
analyses. Although, in connection with the delivery of its opinion, Lazard
Freres also analyzed SPX, Lazard Freres's opinion is not a valuation of SPX and
does not represent Lazard Freres's view as to what the value of the SPX Common
Stock will be upon consummation of the Merger. As described above, Lazard
Freres's opinion to the General Signal Board was one of many factors taken into
consideration by the General Signal Board in making its determination to approve
the Merger Agreement. The foregoing summary does not purport to be a complete
description of the analyses performed by Lazard Freres and is qualified by
reference to the written opinion of Lazard Freres set forth in Appendix C
hereto.
    
 
   
     Lazard Freres is an internationally recognized investment banking firm and
is continually engaged in the valuation of businesses and their securities in
connection with mergers and acquisitions, negotiated underwritings, secondary
distributions of listed and unlisted securities, private placements, leveraged
buyouts and valuations for estate, corporate and other purposes. Lazard Freres
was selected to act as investment banker to the General Signal Board because of
its expertise and its reputation in investment banking and mergers and
acquisitions and its familiarity with General Signal.
    
 
   
     In connection with Lazard Freres's services as investment banker to the
General Signal Board, including its rendering of the opinion summarized above,
General Signal paid Lazard Freres an initial fee of $2.0 million upon the
execution of the Merger Agreement. General Signal has also agreed to pay Lazard
Freres a transaction fee equal to .35% of the aggregate consideration to be paid
in the Merger (against which the initial $2.0 million fee will be credited)
upon, and subject to, consummation of the Merger. Whether or not the Merger is
consummated, General Signal has agreed to reimburse Lazard Freres for its
out-of-pocket expenses, including reasonable fees and expenses of its legal
counsel, and to indemnify Lazard Freres and certain related parties against
certain liabilities, including liabilities arising under U.S. securities laws.
    
 
   
     Lazard Freres has in the past provided, and is currently providing,
investment banking services to General Signal for which it has received, and
anticipates receiving, customary fees. In the ordinary course of business,
Lazard Freres and its affiliates may actively trade in securities of General
Signal for their own account and for the account of their customers and,
accordingly, may at any time hold long or short positions in such securities.
    
 
ACCOUNTING TREATMENT
 
   
     The Merger will be accounted for as a reverse acquisition because the
stockholders of General Signal will own approximately 60% of the shares of the
combined company upon completion of the Merger. Accordingly, for accounting
purposes, SPX will be treated as the acquired company and General Signal will be
considered to be the acquiring company. The purchase price will be allocated to
the assets and liabilities of SPX based on their estimated fair market values at
the date of acquisition. Under reverse acquisition accounting, the purchase
price is based on the fair market value of the SPX Common Stock at the date that
the Merger Agreement was signed. The cash portion of the Merger Consideration
will be accounted for as a dividend by the combined company. SPX's financial
position and results of operations will not be included in the combined
company's consolidated accounts prior to the date the Merger is consummated.
    
 
BOARD AND MANAGEMENT FOLLOWING THE MERGER
 
     The directors of MergerSub immediately prior to the Effective Time will be
the directors of the Surviving Corporation and the officers of MergerSub
immediately prior to the Effective Time will be the officers of the Surviving
Corporation.
 
     Under the Merger Agreement, the SPX Board is required to take all action
necessary to elect the following persons, who are currently serving on the
General Signal Board, to the SPX Board as of the Effective Time: (i) Emerson U.
Fullwood, who will be assigned to the class of directors whose term of office
expires at
                                       49
<PAGE>   61
 
SPX's first annual meeting of stockholders after the Effective Time, and (ii) H.
Kent Bowen, who will be assigned to the class of directors whose term of office
expires at SPX's second annual meeting of stockholders after the Effective Time.
 
  REGULATORY APPROVALS
 
   
     Under the HSR Act, the Merger may not be consummated until Notification and
Report Forms have been submitted and certain information has been furnished by
each of SPX and General Signal to the FTC and the Antitrust Division, and
required waiting periods have expired or been terminated. On August 5, 1998, SPX
and General Signal filed Notification and Report Forms with the FTC and the
Antitrust Division and, on August 24, 1998, were notified by the FTC that the
FTC had granted early termination, effective as of such date, of the HSR Act
waiting period applicable to the Merger.
    
 
   
     As a result of the Merger, SPX and General Signal are required to notify or
obtain the consent of regulatory authorities in certain foreign countries where
SPX or General Signal conducts business pursuant to antitrust or foreign
investment laws and are in the process of giving such notices and obtaining such
consents. In addition, the transfer of the businesses from EGS to General
Signal, discussed in Note (c) of the Notes to the Selected Historical
Consolidated Financial Data of General Signal (see the "Selected Historical
Consolidated Financial Data of General Signal"), required a filing by General
Signal and EGS under the HSR Act. General Signal and EGS filed Notification and
Report Forms with the FTC and the Antitrust Division on August 26, 1998. The
initial HSR Act waiting period will expire at 11:59 p.m. on September 25, 1998.
    
 
  INTERESTS OF CERTAIN PERSONS IN THE MERGER
 
     In considering the recommendation of the General Signal Board with respect
to the Merger Agreement and the transactions contemplated thereby, the General
Signal stockholders should be aware that certain members of the management of
General Signal and of the General Signal Board have certain interests in the
Merger that are in addition to the interests of stockholders of General Signal
generally.
 
   
     Severance Payments. General Signal has change-of-control employment
agreements (each, an "Employment Agreement") with 12 individuals (each, an
"Executive"), including 11 executive officers, which entitle each such Executive
to benefits upon a covered termination of employment following a change of
control. The Merger would constitute a "change of control" under the Employment
Agreements.
    
 
   
     If the Executive's employment is terminated by SPX or the Surviving
Corporation (other than for Cause, Death or Disability, each as defined in the
applicable Employment Agreement) or by the Executive for Good Reason (as defined
in the applicable Employment Agreement) within three years following the Merger
(the "Change of Control Period"), the Executive will receive a lump sum cash
payment within 30 days after the date of termination (net of amounts paid to the
Executive pursuant to the Annual Incentive Plan (as defined below)) equal to (a)
the Executive's accrued salary and the prorated portion of an annual target
bonus (such prorated portion to be equal to the product of (i) the higher of (x)
the Executive's annual target bonus for the current fiscal year and (y) the
Executive's annual target bonus for the prior fiscal year (the "Target Bonus")
and (ii) the portion of the year through the termination date) plus (b) three
times the sum of (i) the Executive's salary and (ii) the Executive's Target
Bonus. Each Executive will also receive a lump sum payment equal to the present
value of (x) the benefits the Executive would have been entitled to receive
during the Change of Control Period under General Signal's Corporate Retirement
Plan, Benefit Equalization Plan and any other pension plan under which the
Executive is entitled to benefits and (y) the aggregate matching or other
employer contributions that would have been made during the Change of Control
Period by General Signal under the terms of its Savings and Stock Ownership Plan
and its Deferred Compensation Plan (calculated as if the Executive participated
in these plans to the same extent as in the fiscal year prior to the date of
termination of the Executive's employment). During the Change of Control Period,
SPX or the Surviving Corporation is also required to provide each Executive with
all benefits under medical, prescription, dental, disability, life and other
welfare benefit plans in effect during the 120 day period prior to the change of
control (or, if more favorable to the Executive, those benefits offered to peer
executives). Each Executive will
    
 
                                       50
<PAGE>   62
 
   
also be entitled to outplacement services (the cost of which may not exceed 15%
of the Executive's annual base salary and Target Bonus) and one year of
continued financial counseling, and will have the right to purchase, at fair
market value, the automobile General Signal was providing to the Executive prior
to the date of termination of the Executive's employment. In addition, Mr.
Lockhart's Employment Agreement provides that the deferred compensation payable
to him pursuant to the terms of his employment agreement will vest immediately,
although it will continue to be deferred until his attainment of age 62. To the
extent any payments to any Executive would give rise to an excise tax under
Section 4999 of the Code, an additional payment would be made so that the total
payments actually retained by the Executive after payment of the excise tax
equals the amount he or she would have received absent the excise tax; provided
that, if such payments (excluding additional amounts payable due to the excise
tax) do not exceed 110% of the greatest amount that could have been paid without
giving rise to the excise tax, no additional payments will be made with respect
to the excise tax, and the payments otherwise due to the Executive will be
reduced to an amount necessary to prevent the application of the excise tax.
    
 
   
     General Signal also has three separate change of control severance policies
(collectively, the "Severance Policies") affecting employees of General Signal
and its subsidiaries other than the Executives: the Change of Control Severance
Policy for Unit Presidents (affecting fourteen unit presidents), the Change of
Control Severance Policy for Key Corporate Employees (affecting twelve key
corporate employees) and the Change of Control Severance Policy for Corporate
Employees (affecting employees of General Signal's headquarters and information
systems department who are not covered by one of the other Severance Policies
and are not a party to an Employment Agreement (approximately 83 employees)).
Benefits under the Severance Policies are triggered, under certain
circumstances, following termination of employment during the three-year period
following a change of control, in the case of unit presidents and key corporate
employees, and during the two-year period following a change of control in the
case of other corporate employees. Unit presidents and key corporate employees
would be entitled to receive benefits substantially similar to those included in
the Employment Agreements, except that the benefits would be based on a two-year
severance period rather than a three-year severance period. Other corporate
employees would be entitled to receive a lump sum payment ranging from four
weeks' salary to two years' salary (depending on the number of years employed by
General Signal and its subsidiaries) and outplacement services, the cost of
which may not exceed 15% of the employee's base salary. Insurance benefits for
other corporate employees will continue for not more than 90 days following
termination. Payments made pursuant to any Severance Policy that are subject to
an excise tax under Section 4999 of the Code will not be "grossed up," but will
be reduced to the extent such reduction will provide the recipient with a
greater after-tax benefit.
    
 
   
     General Signal Annual Incentive Plan for Corporate and Business Unit
Management. Pursuant to the terms of the General Signal Annual Incentive Plan
for Corporate and Business Unit Management (the "Annual Incentive Plan"), within
30 days of the consummation of the Merger, each participant in the Annual
Incentive Plan will be entitled to a cash bonus calculated in accordance with
the terms of the Annual Incentive Plan. This bonus will either be paid to the
participant or be deferred, in accordance with an election previously made by
the participant. The Merger will constitute a "change of control" under the
Annual Incentive Plan.
    
 
   
     General Signal Deferred Compensation Plans. Directors of General Signal
participate in the General Signal Corporation Deferred Compensation Plan for
Directors, and certain employees of General Signal participate in the General
Signal Deferred Compensation Plan. These plans permit participants to elect to
defer compensation which would otherwise be payable to them. The deferred
compensation is deemed invested either in an interest-bearing cash account or in
phantom stock units which mirror the performance of General Signal Common Stock.
Immediately prior to the Merger, each participant's phantom stock units will
(subject to participant consent where required) be converted into an amount of
cash at a conversion price of $45 per phantom stock unit. Following the Merger,
such deferred amounts will be deemed invested in the investment choices offered
under the corresponding deferred compensation plans of SPX, as elected by the
participant.
    
 
     General Signal Options and Restricted Shares. The Merger Agreement provides
that, subject to the consent of the holders thereof where required, immediately
prior to the Effective Time, holders of Restricted
                                       51
<PAGE>   63
 
Shares or General Signal Options will be entitled to receive a cash payment of
$45.00 per underlying share in exchange for their Restricted Shares and General
Signal Options (less, in the case of General Signal Options, the applicable per
share exercise price of such option). General Signal's executive officers and
directors collectively hold 138,205 Restricted Shares and General Signal Options
to purchase 1,041,901 shares of General Signal Common Stock. General Signal
expects to make an aggregate cash payment of approximately $12.1 million in
exchange for the Restricted Shares and General Signal Options held by the
executive officers and directors of General Signal.
 
   
     SPX Directorships. Under the Merger Agreement, the SPX Board is required to
take all action necessary to elect Messrs. H. Kent Bowen and Emerson U. Fullwood
to the SPX Board as of the Effective Time. As directors of SPX, Messrs. Bowen
and Fullwood will be eligible to receive the compensation and benefits available
to all of SPX's non-employee directors.
    
 
     Indemnification and Insurance. Pursuant to the Merger Agreement, SPX is
required, for a period of six years following the Effective Time, to indemnify
and hold harmless each of the current or former directors and officers of
General Signal or any of its subsidiaries for acts or omissions occurring at or
prior to the Effective Time to the fullest extent permitted by applicable law.
SPX is also required to use its reasonable best efforts during this period to
maintain General Signal's current directors' and officers' liability insurance,
subject to certain limitations. See "The Merger Agreement -- Certain
Covenants -- Indemnification and Insurance."
 
   
     The foregoing discussion is a summary of certain provisions of the
applicable plans and agreements and is qualified in its entirety by the
applicable plans and agreements.
    
 
  NO DISSENTERS' RIGHTS
 
     No holder of SPX Common Stock or General Signal Common Stock will have any
dissenters' rights in connection with, or as a result of, the matters to be
acted upon at the Special Meetings.
 
  STOCK EXCHANGE LISTINGS
 
     It is a condition to the Merger that, upon consummation of the Merger, the
shares of SPX Common Stock to be issued by SPX in connection with the Merger be
authorized for listing on the NYSE, and such other stock exchanges as may be
agreed upon by SPX and General Signal, subject to official notice of issuance.
 
  DELISTING AND DEREGISTRATION OF THE GENERAL SIGNAL COMMON STOCK
 
     If the Merger is consummated, the General Signal Common Stock will be
delisted from the NYSE and the PE and deregistered under the Exchange Act.
 
  TREATMENT OF GENERAL SIGNAL STOCK CERTIFICATES
 
   
     Upon consummation of the Merger, each holder of a Stock Certificate
representing shares of General Signal Common Stock outstanding immediately prior
to the Merger will, upon the surrender thereof (duly endorsed, if required) to
the Exchange Agent, be entitled to receive the Merger Consideration into which
such shares of General Signal Common Stock will have been automatically
converted as a result of the Merger. Shortly after the mailing of this Joint
Proxy Statement/Prospectus, a Form of Election will be sent to the General
Signal stockholders who are holders of General Signal Common Stock as of the
General Signal Record Date. Persons who become General Signal Stockholders after
that date or who otherwise need copies of the Form of Election may obtain a Form
of Election from the Information Agent by calling (800) 628-8510 or from the
Exchange Agent by calling (800) 507-9357. In order to make an Election with
respect to the type of Merger Consideration to be received in the Merger, a
holder of record of shares of General Signal Common Stock (or the beneficial
owner thereof through the nominee) must return to the Exchange Agent, with
receipt by the Exchange Agent no later than the Election Deadline, a Form of
Election fully completed and signed, accompanied either by the Stock
Certificates representing the shares of General Signal Common Stock for which an
Election is being made or by a Guarantee of Delivery (in which event the holder
must deliver his or
    
 
                                       52
<PAGE>   64
 
   
her Stock Certificates to the Exchange Agent within three NYSE trading days
thereafter). After the consummation of the Merger, the Exchange Agent will mail
a Letter of Transmittal (with instructions) to any holders of record of General
Signal Common Stock as of the Effective Time who did not send in a Form of
Election and their Stock Certificates prior to the Effective Time, for use in
surrendering their Stock Certificates in exchange for the Merger Consideration
to which they are entitled. See "The Merger Agreement -- Exchange of
Certificates."
    
 
  AMENDMENT OF GENERAL SIGNAL RIGHTS AGREEMENT
 
     In connection with its approval of the Merger Agreement, the General Signal
Board amended the General Signal Rights Agreement with the result that neither
the entering into of the Merger Agreement by General Signal, SPX and Merger Sub,
nor consummation of the transactions contemplated thereby, will cause the
General Signal Rights to separate from the shares of General Signal Common
Stock, entitle or permit the holders of the General Signal Rights to exercise
the General Signal Rights or otherwise trigger any effect under the General
Signal Rights Agreement. See "Comparison of Rights of Stockholders of SPX and
General Signal -- Stockholder Rights Plans."
 
  MERGER FINANCING
 
   
     The total amount of the Merger Financing, i.e., the amount of cash and
borrowings required to consummate the transactions contemplated by the Merger
Agreement, including payment of the Aggregate Cash Consideration in the Merger,
payments in respect of General Signal Options and Restricted Shares, refinancing
of existing indebtedness of SPX and General Signal, and transaction fees and
expenses, is estimated to be approximately $1.5 billion. Pursuant to the
Commitment Letter, the Merger Financing will be provided by Chase and CSI which
will underwrite and syndicate a total of $1.65 billion of Senior Facilities
consisting of Term Loans aggregating $1.4 billion and a $250.0 million Revolving
Credit Facility, fully underwritten by Chase.
    
 
   
     The Term Loans will consist of: (a) $600.0 million of Tranche A Term Loans
maturing six years after the Effective Time; (b) $600.0 million of Tranche B
Term Loans maturing eight years after the Effective Time; and (c) $200.0 million
of Tranche X Term Loans maturing eighteen months after the Effective Time. The
Revolving Credit Facility will mature six years after the Effective Time.
    
 
   
     The Senior Facilities will be jointly and severally guaranteed by each of
SPX's direct and indirect material domestic subsidiaries, subject to certain
exceptions to be agreed upon, and will also be secured by a pledge of (i) the
material assets of SPX and its direct and indirect material domestic
subsidiaries and (ii) all of the capital stock of SPX's direct and indirect
material subsidiaries, subject to certain limitations for foreign subsidiaries
and certain exceptions to be agreed upon.
    
 
   
     Interest on the Senior Facilities will be determined pursuant to pricing
grids set forth in the Commitment Letter. Chase and CSI will receive fees
customary for facilities of the types described above, including agent's fees,
underwriting and commitment fees and certain termination fees, all of which are
non-refundable.
    
 
   
     The Merger Financing is subject to the satisfaction of certain closing
conditions, including customary corporate and document delivery requirements and
consummation of the Merger. The definitive documentation with respect to the
Merger Financing is subject to further negotiation between SPX, on the one hand,
and Chase and CSI, on the other hand, and is expected to contain customary
representations and warranties, covenants, on-going conditions, and events of
default. Receipt of the Merger Financing is not a condition to SPX's obligation
to consummate the Merger.
    
 
                                       53
<PAGE>   65
 
                              THE MERGER AGREEMENT
 
     The following is a brief summary of certain provisions of the Merger
Agreement, a copy of which is attached as Appendix A to this Joint Proxy
Statement/Prospectus and is incorporated herein by reference. This summary is
qualified in its entirety by reference to the full text of the Merger Agreement.
Capitalized terms that are used in this section and are not defined have the
respective meanings given to them in the Merger Agreement.
 
THE MERGER
 
   
     Pursuant to the Merger Agreement, upon the satisfaction (or waiver, where
legally permissible) of the conditions that are contained in the Merger
Agreement (see "-- Conditions"), General Signal will be merged with and into
MergerSub, with MergerSub continuing as the Surviving Corporation. The parties
will cause the Merger to be accomplished by filing the Delaware Certificate of
Merger with the Secretary of State of the State of Delaware in accordance with
the relevant provisions of the Delaware General Corporation Law ("DGCL"), and
the New York Certificate of Merger with the Department of State of the State of
New York in accordance with the relevant provisions of the New York Business
Corporation Law ("NYBCL"). The Merger will become effective at the time the
Certificates of Merger have been filed with both the Secretary of State of the
State of Delaware and the Department of State of the State of New York or at
such later time as may be agreed upon by SPX and General Signal and specified in
the Certificates of Merger.
    
 
CONVERSION OF SECURITIES
 
   
     As a result of the Merger and without any action on the part of MergerSub,
General Signal or their stockholders, at the Effective Time each share of
General Signal Common Stock issued and outstanding immediately prior to the
Effective Time will be converted into the right to receive, at his or her
election but subject to the limitations and proration procedures described in
this Joint Proxy Statement/Prospectus and as set forth in the Merger Agreement,
EITHER (i) 0.6977 of a share of SPX Common Stock, OR (ii) $45.00 in cash,
without interest, OR (iii) 0.4186 of a share of SPX Common Stock and $18.00 in
cash, without interest. Each share of General Signal Common Stock held in the
treasury of General Signal and each share of General Signal Common Stock owned
by SPX or any of SPX's or General Signal's subsidiaries immediately prior to the
Effective Time will be canceled and extinguished without any conversion thereof
and no payment will be made with respect thereto. Each share of MergerSub issued
and outstanding immediately prior to the Effective Time will be converted into
one share of common stock of the Surviving Corporation.
    
 
   
     Subject to the consent of each holder thereof where required, immediately
prior to the Effective Time, (i) each General Signal Option then outstanding
will be canceled and, in respect thereof, the holder will receive a cash payment
equal to the number of shares of General Signal Common Stock then subject to the
General Signal Option, whether or not vested or exercisable, multiplied by the
excess of $45.00 over the per share exercise price thereof, and (ii) each
Restricted Share will be canceled and, in respect thereof, the holder will
receive a cash payment in the amount of $45.00.
    
 
ELECTIONS
 
   
     General. Subject to the limitations discussed below under "-- Limitations,"
each holder of shares of General Signal Common Stock immediately prior to the
Effective Time will be entitled EITHER (i) to make a Cash Election, i.e., to
elect to receive $45.00 for each of his or her shares, OR (ii) to make a Stock
Election, i.e., to elect to receive 0.6977 of a share of SPX Common Stock for
each such share, OR (iii) to make a Mixed Election, i.e., to elect to receive
60% of 0.6977 (or 0.4186) of a share of SPX Common Stock and 40% of $45.00 (or
$18.00) for each such share, OR (iv) to make a Non-Election, i.e., to indicate
that such holder has no preference as to the receipt of cash, SPX Common Stock
or the combination thereof with respect to such holder's shares of General
Signal Common Stock. Any stockholder who does not make an Election before the
Election Deadline will be deemed to have made a Non-Election. All Elections must
be made on the Form of Election. If more than one Stock Certificate is
surrendered for the account of the same holder, the number of shares of SPX
Common Stock, if any, to be issued to such holder in exchange for the Stock
Certificates which
    
 
                                       54
<PAGE>   66
 
have been surrendered will be computed on the basis of the aggregate number of
shares represented by all of the Stock Certificates surrendered for the account
of such holder. Holders of record of shares of General Signal Common Stock who
hold such shares in a representative capacity may submit multiple Forms of
Election, provided that such representative certifies that each such Form of
Election covers all shares of General Signal Common Stock held by such
representative for a particular beneficial owner.
 
     The holders of shares of General Signal Common Stock should carefully
consider the tax consequences of making a Stock Election, a Cash Election or a
Mixed Election. See "Certain Federal Income Tax Consequences of the Merger." The
General Signal stockholders are urged to consult with their advisors to
determine the tax consequences to them of the Merger.
 
   
     Limitations. Under the terms of the Merger Agreement, only 40% of the
outstanding shares of General Signal Common Stock may be converted into the
right to receive cash in the Merger, and only 60% of the outstanding shares of
General Signal Common Stock may be converted into the right to receive SPX
Common Stock in the Merger. The Merger Agreement provides for proration if, as a
result of the Elections made, either of the foregoing limitations would
otherwise be exceeded, as follows:
    
 
     Cash Oversubscription. If the sum of (i) the aggregate number of shares of
General Signal Common Stock with respect to which Cash Elections have been made
plus (ii) 40% of the aggregate number of shares of General Signal Common Stock
with respect to which Mixed Elections have been made exceeds the aggregate
number of shares of General Signal Common Stock which may be converted into the
right to receive cash in the Merger, then (a) each share of General Signal
Common Stock with respect to which a Stock Election has been made will be
converted into the right to receive 0.6977 of a share of SPX Common Stock; (b)
each share of General Signal Common Stock with respect to which a Non-Election
has been made (or is deemed to have been made) will be treated as though a Stock
Election had been made with respect thereto and will be converted into the right
to receive 0.6977 of a share of SPX Common Stock; (c) each share of General
Signal Common Stock with respect to which a Cash Election has been made will be
converted into the right to receive:
 
          (1) the amount in cash, without interest, equal to the product of
     $45.00 and a fraction (the "Cash Fraction"), the numerator of which is the
     aggregate number of shares of General Signal Common Stock which may be
     converted into the right to receive cash in the Merger, and the denominator
     of which is the sum of the aggregate number of shares of General Signal
     Common Stock with respect to which Cash Elections have been made plus 40%
     of the aggregate number of shares of General Signal Common Stock with
     respect to which Mixed Elections have been made, plus
 
          (2) the number of shares of SPX Common Stock equal to 0.6977 of a
     share of SPX Common Stock multiplied by a fraction equal to one minus the
     Cash Fraction;
 
   
and (d) each share of General Signal Common Stock with respect to which a Mixed
Election has been made will be converted into the right to receive 0.4186 of a
share of SPX Common Stock plus 40% of the amount of cash specified in the
foregoing clause (1) and 40% of the number of shares of SPX Common Stock
specified in the foregoing clause (2).
    
 
   
     Stock Oversubscription. If the sum of (i) the aggregate number of shares of
General Signal Common Stock with respect to which Stock Elections have been made
plus (ii) 60% of the aggregate number of shares of General Signal Common Stock
with respect to which Mixed Elections have been made exceeds the aggregate
number of shares of General Signal Common Stock which may be converted into the
right to receive SPX Common Stock in the Merger, then (a) each share of General
Signal Common Stock with respect to which a Cash Election has been made will be
converted into the right to receive $45.00, without interest; (b) each share of
General Signal Common Stock with respect to which a Non-Election has been made
(or is deemed to have been made) will be treated as though a Cash Election had
been made with respect thereto and will be converted into the right to receive
$45.00, without interest; (c) each share of
    
 
                                       55
<PAGE>   67
 
General Signal Common Stock with respect to which a Stock Election has been made
will be converted into the right to receive:
 
          (1) the number of shares of SPX Common Stock equal to the product of
     0.6977 of a share of SPX Common Stock and a fraction (the "Stock
     Fraction"), the numerator of which is the aggregate number of shares which
     may be converted into the right to receive SPX Common Stock in the Merger,
     and the denominator of which is the sum of the aggregate number of shares
     of General Signal Common Stock with respect to which Stock Elections have
     been made plus 60% of the aggregate number of shares of General Signal
     Common Stock with respect to which Mixed Elections have been made, plus
 
          (2) the amount in cash, without interest, equal to $45.00 multiplied
     by a fraction equal to one minus the Stock Fraction;
 
   
and (d) each share of General Signal Common Stock with respect to which a Mixed
Election has been made will be converted into the right to receive $18.00,
without interest, plus 60% of the number of shares of SPX Common Stock specified
in the foregoing clause (1) and 60% of the amount of cash specified in the
foregoing clause (2).
    
 
   
     Elections Undersubscribed. If neither of the foregoing limitations has been
exceeded, but not every stockholder has timely made an Election, then (a) each
share of General Signal Common Stock with respect to which a Cash Election has
been made will be converted into the right to receive $45.00, without interest;
(b) each share of General Signal Common Stock with respect to which a Stock
Election has been made will be converted into the right to receive 0.6977 of a
share of SPX Common Stock; (c) each share of General Signal Common Stock with
respect to which a Mixed Election has been made will be converted into the right
to receive $18.00, without interest, and 0.4186 of a share of SPX Common Stock;
and (d) each share of General Signal Common Stock with respect to which a
Non-Election has been made (or is deemed to have been made) will be converted
into the right to receive:
    
 
          (1) the amount in cash, without interest, equal to the product of (i)
     $45.00 and (ii) a fraction (the "Non-Election Fraction"), the numerator of
     which is the excess of the aggregate number of shares of General Signal
     Common Stock which may be converted into the right to receive cash in the
     Merger over the sum of the aggregate number of shares of General Signal
     Common Stock with respect to which a Cash Election has been made plus 40%
     of the aggregate number of shares of General Signal Common Stock with
     respect to which Mixed Elections have been made, and the denominator of
     which is the excess of the aggregate number of shares of General Signal
     Common Stock outstanding immediately prior to the Effective Time over the
     sum of the aggregate number of shares with respect to which Cash Elections,
     Stock Elections and Mixed Elections have been made, plus
 
          (2) the number of shares of SPX Common Stock equal to the product of
     0.6977 of a share of SPX Common Stock and a fraction equal to one minus the
     Non-Election Fraction.
 
ELECTION PROCEDURE
 
   
     A Form of Election will be mailed to General Signal stockholders who are
stockholders of record as of August 28, 1998, the General Signal Record Date,
shortly after the mailing of this Joint Proxy Statement/Prospectus. Persons who
become holders of General Signal Common Stock after that date or who otherwise
need copies of the Form of Election may obtain the Form of Election from the
Information Agent by calling (800) 628-8510 or from the Exchange Agent by
calling (800) 507-9357.
    
 
   
     The Election Deadline is 5:00 p.m. (Eastern Time) on October 2, 1998, the
last business day prior to the General Signal Special Meeting, unless otherwise
extended by mutual agreement of SPX and General Signal. In order to make an
Election, a holder of record of shares of General Signal Common Stock (or the
beneficial owner thereof through the nominee) must return to the Exchange Agent,
with receipt by the Exchange Agent by the Election Deadline, a Form of Election
properly completed and signed, and accompanied by the Stock Certificates
representing the shares of General Signal Common Stock for which the Election is
being made. If the Stock Certificates are not available at the time the Form of
Election is sent to the Exchange Agent, the stockholder may instead provide a
Guarantee of Delivery (which has been incorporated into the Form of Election)
from a qualified financial institution (which in effect guarantees to SPX that
the Stock Certificates
    
                                       56
<PAGE>   68
 
will be delivered to the Exchange Agent) and must, within three NYSE trading
days thereafter, deliver to the Exchange Agent the Stock Certificates
representing the shares in respect of which an Election is being made. Any
stockholder who fails to deliver a completed and signed Form of Election and his
or her Stock Certificates within the requisite period of time will be treated as
though he or she had made a Non-Election.
 
   
     Any Guarantee of Delivery of Stock Certificates must be from a firm which
is a member of a registered national securities exchange or of the National
Association of Securities Dealers, Inc., or a commercial bank or trust company
having an office or correspondent in the United States, and the Stock
Certificates covered by any Guarantee of Delivery must in fact be delivered to
the Exchange Agent within three NYSE trading days after the date of execution of
the Guarantee of Delivery. Failure to deliver such Stock Certificates within
such three day period will be deemed to invalidate any otherwise properly made
Election.
    
 
     Any Form of Election may be changed or revoked prior to the Election
Deadline. In the event a Form of Election is revoked prior to the Election
Deadline, SPX will, or will cause the Exchange Agent to, cause the Stock
Certificates representing the shares of General Signal Common Stock covered by
such Form of Election to be promptly returned without charge to the person
submitting the Form of Election upon written request to that effect from such
person.
 
   
     A holder of shares of General Signal Common Stock who (i) does not submit a
properly completed Form of Election which is received by the Exchange Agent
prior to the Election Deadline (including a holder who submits and then revokes
his or her Form of Election and does not resubmit a Form of Election which is
timely received by the Exchange Agent), (ii) submits a Form of Election without
the corresponding Stock Certificates or a Guarantee of Delivery, or (iii)
submits a Guarantee of Delivery, but does not deliver the actual Stock
Certificates within three NYSE trading days thereafter, will be deemed to have
made a Non-Election. If a Form of Election is defective in any manner that the
Exchange Agent cannot reasonably determine the election preference of the
stockholder submitting such Form of Election, then the purported Election set
forth therein will be deemed to be of no force and effect and the stockholder
will be deemed to have made a Non-Election.
    
 
   
     SPX will have the discretion, which it may delegate in whole or in part to
the Exchange Agent, to determine whether Forms of Election have been properly
completed, signed and submitted or revoked, and to disregard immaterial defects
in Forms of Election. The good faith decision of SPX (or the Exchange Agent) in
these matters will be conclusive and binding. Neither SPX nor the Exchange Agent
will be under any obligation to notify any person of any defect in a Form of
Election submitted to the Exchange Agent.
    
 
   
     All Elections will be subject to the proration procedures discussed above
under "-- Elections -- Limitations." As a result of the proration procedures, a
holder who makes an Election may receive a combination of cash and SPX Common
Stock that differs from the cash and/or SPX Common Stock specified in such
Election. The Exchange Agent will also make all computations contemplated by the
proration procedures discussed above under "-- Elections -- Limitations," and
all such computations will be conclusive and binding on the holders of shares of
General Signal Common Stock in the absence of manifest error.
    
 
   
PAYMENT OF MERGER CONSIDERATION; EXCHANGE OF CERTIFICATES
    
 
   
     As soon as reasonably practicable after the Effective Time, the Exchange
Agent will mail to each person who was, at the Effective Time, a holder of
record of shares of General Signal Common Stock and who did not send a Form of
Election and his or her Stock Certificates or a Guarantee of Delivery prior to
the Election Deadline, a Letter of Transmittal to be used by the holder in
effecting the surrender of his or her Stock Certificates in exchange for the
Merger Consideration.
    
 
   
     Upon the later of the Effective Time and the surrender to the Exchange
Agent of his or her Stock Certificate for cancellation, together with a duly
executed Form of Election or Letter of Transmittal and any other required
documents, the holder of the Stock Certificate will be entitled to receive the
Merger Consideration in respect of the surrendered shares of General Signal
Common Stock, to which such holder is
    
 
                                       57
<PAGE>   69
 
   
entitled under the Merger Agreement. In the event that the Effective Time occurs
within three NYSE trading days following the Election Deadline, payment may be
delayed for up to three NYSE trading days after the Election Deadline to enable
the Exchange Agent to confirm that all Stock Certificates in respect of which
Guarantees of Delivery were furnished are in fact timely delivered to the
Exchange Agent.
    
 
     No fractional shares of SPX Common Stock will be issued and any holder of
shares of General Signal Common Stock entitled under the Merger Agreement to
receive a fractional share will receive a cash payment (without interest) in
lieu of the fractional share, in an amount equal to the value (determined with
reference to the closing price of a share of SPX Common Stock as reported on the
NYSE Composite Tape on the trading day immediately prior to the Effective Time)
of such fractional interest. If more than one Stock Certificate is surrendered
by the same stockholder, the number of shares represented by all of the Stock
Certificates surrendered will be aggregated for purposes of calculating how many
shares of SPX Common Stock will be issued in exchange for such certificates.
 
     Any portion of the SPX Common Stock issuable or cash payable pursuant to
the Merger Agreement which remains undistributed to holders of shares of General
Signal Common Stock six months after the Effective Time will be delivered to
SPX, upon demand, and any General Signal stockholder who has not complied with
the exchange procedures in the Merger Agreement by that time will thereafter
have to look to SPX for payment of his or her claim for the Merger Consideration
and any cash in lieu of fractional shares of SPX Common Stock. None of SPX,
General Signal, MergerSub or the Exchange Agent will be liable to any person in
respect of shares of SPX Common Stock or cash delivered to a public official
pursuant to any applicable abandoned property, escheat or similar law.
 
     If any Stock Certificates are not surrendered within seven years after the
Effective Time (or immediately prior to such earlier date on which any Merger
Consideration and any cash payable in lieu of fractional shares would otherwise
escheat to or become the property of any governmental body or authority), any
such Merger Consideration or cash in lieu of fractional shares that would
otherwise be payable in respect of such Stock Certificate will, to the extent
permitted by applicable law, become the property of the Surviving Corporation,
free and clear of all claims or interest of any person previously entitled
thereto.
 
   
     SPX and MergerSub will be entitled to deduct and withhold from the
consideration otherwise payable under the Merger Agreement to any holder of
shares of General Signal Common Stock such amounts as SPX or MergerSub is
required to deduct and withhold with respect to the making of such payment under
the Code or any provision of state, local or foreign tax law. To the extent that
amounts are so withheld by SPX or MergerSub, such withheld amounts will be
treated for all purposes of the Merger Agreement as having been paid to the
holder of the shares of General Signal Common Stock in respect of which such
deduction and withholding was made by SPX or MergerSub. To prevent backup U.S.
federal income tax withholding with respect to the consideration received by the
General Signal stockholders in the Merger, each stockholder who does not
otherwise establish an exemption from backup withholding must notify the
Exchange Agent of such stockholder's correct taxpayer identification number (or
certify that such stockholder is awaiting a taxpayer identification number) and
provide certain other information by completing, under penalties of perjury, a
Substitute Form W-9 included in the Form of Election or the Letter of
Transmittal. Noncorporate foreign stockholders should generally complete and
sign a Form W-8, Certificate of Foreign Status, a copy of which may be obtained
from the Exchange Agent, in order to avoid backup withholding.
    
 
   
     If any Stock Certificate is lost, stolen or destroyed, then, upon the
making of an affidavit of that fact by the person claiming such Stock
Certificate to be lost, stolen or destroyed and, if required by the Surviving
Corporation, the posting by that person of an indemnity bond in such reasonable
amount as the Surviving Corporation may direct, the Exchange Agent will issue in
exchange for such lost, stolen or destroyed Stock Certificate the Merger
Consideration and cash in lieu of fractional shares, as described above.
    
 
     If the Merger Agreement is terminated without the Merger having occurred,
SPX will, or will cause the Exchange Agent to, return promptly any Stock
Certificates submitted or delivered to SPX or the Exchange Agent without charge
to the person who submitted such Stock Certificates.
 
                                       58
<PAGE>   70
 
     There will be no further registration of transfers on the stock transfer
books of the Surviving Corporation of the shares of General Signal Common Stock
which were outstanding immediately prior to the Effective Time. If, after the
Effective Time, Stock Certificates are presented to the Surviving Corporation or
the Exchange Agent for any reason, they will be canceled and exchanged as
provided in the Merger Agreement, except as otherwise provided by law.
 
CORPORATE ORGANIZATION AND GOVERNANCE
 
   
     Certificate of Incorporation and By-Laws of the Surviving Corporation. The
Certificate of Incorporation of MergerSub, in the form attached as Exhibit A to
the Merger Agreement, will be the Certificate of Incorporation of the Surviving
Corporation until thereafter amended. The By-Laws of MergerSub, as in effect
immediately prior to the Effective Time, will be the By-Laws of the Surviving
Corporation until thereafter amended.
    
 
     Board of Directors and Officers. The directors and officers of MergerSub at
the Effective Time will continue to be the directors and officers, respectively,
of the Surviving Corporation until their respective successors are duly elected
and qualified.
 
   
     Under the Merger Agreement, the SPX Board is required to take all action
necessary to elect the following persons to the SPX Board as of the Effective
Time: (i) Emerson U. Fullwood, who will be assigned to the class of directors
whose term of office expires at SPX's first annual meeting of stockholders after
the Effective Time, and (ii) H. Kent Bowen, who will be assigned to the class of
directors whose term of office expires at SPX's second annual meeting of
stockholders after the Effective Time.
    
 
REPRESENTATIONS AND WARRANTIES
 
     The Merger Agreement contains various representations and warranties of
SPX, General Signal and MergerSub relating, among other things, to the
following: (i) due organization, existence, good standing, corporate power and
similar corporate matters, (ii) capitalization, (iii) authorization, execution,
delivery and enforceability of the Merger Agreement, (iv) the absence of any
conflicts, violations and defaults under SPX's and General Signal's respective
Certificates of Incorporation and By-Laws and certain other agreements and
documents, and the absence of any need for third-party consents by reason of the
execution of the Merger Agreement, (v) the timely filing of reports and other
documents with the Commission and the accuracy and completeness of the financial
and other information contained therein, (vi) the absence of undisclosed
liabilities or obligations of any nature which would have a Material Adverse
Effect (as defined in the Merger Agreement) on SPX or General Signal, (vii)
compliance with Law, (viii) environmental matters, (ix) employee benefit
matters, (x) the absence of certain material changes or events since December
31, 1997, (xi) the absence of pending or threatened litigation, (xii) material
contracts, (xiii) labor matters, (xiv) certain tax matters, including the
absence of facts inconsistent with the Merger's qualification as a
reorganization under Section 368(a) of the Code, (xv) the receipt of fairness
opinions from financial advisors, (xvi) the taking of all action necessary to
exempt the Merger Agreement from certain anti-takeover laws and the Rights
Agreements of General Signal and SPX, (xvii) the required vote of stockholders,
and (xviii) finders or brokers. SPX and MergerSub made an additional
representation and warranty as to the receipt by SPX of written commitments to
obtain the funds necessary for the consummation of transactions contemplated by
the Merger Agreement. All representations and warranties of SPX, General Signal
and MergerSub will expire at the Effective Time.
 
CERTAIN COVENANTS
 
     Conduct of Business. General Signal has agreed, among other things, that
during the period between the signing of the Merger Agreement and the Effective
Time, except as may otherwise be consented to in writing by the other parties to
the Merger Agreement or as may be expressly permitted pursuant to the Merger
Agreement, it will, and will cause each of its subsidiaries to, conduct its
operations in the ordinary course and use its reasonable best efforts to
preserve intact its business organization and goodwill in all material respects,
keep available the services of its officers and employees as a group, subject to
changes in the ordinary course,
 
                                       59
<PAGE>   71
 
   
and maintain its existing relationships with customers, suppliers and other
third parties. The Merger Agreement places restrictions on the ability of
General Signal and its subsidiaries to (i) authorize, declare or pay dividends
on or make distributions with respect to its shares of stock, (ii) enter into or
amend employment, severance or similar arrangements or increase the compensation
or benefits provided to employees, except in the ordinary course of business
consistent with past practice, (iii) publicly announce an intention to authorize
or enter into an agreement or take any action to consummate an agreement with
respect to any (a) merger, consolidation or business combination, (b)
liquidation or other reorganization, or (c) acquisition or disposition of a
material amount of assets or securities, or any release or relinquishment of any
material rights under any material contracts, (iv) propose or adopt amendments
to its Certificate of Incorporation, By-Laws or Rights Agreement, or take action
with respect to its Rights Agreement, (v) dispose of or encumber capital stock
owned by it in any of its subsidiaries or any interest in EGS, (vi) issue, sell
or permit to become outstanding any shares of its capital stock, change its
equity capitalization, or acquire shares of its capital stock, (vii) grant
rights to acquire any shares of its capital stock, or enter into any
arrangements relating to its capital stock, (viii) amend the terms of any
employee compensation or benefit plan, or adopt any such new plan, (ix) incur
indebtedness for borrowed money, (x) encumber any material asset or material
amount of assets, (xi) take actions which could reasonably be expected to cause
the Merger to fail to qualify as a reorganization under Section 368(a) of the
Code, (xii) commit to certain capital expenditures, or (xiii) adopt changes in
its accounting principles.
    
 
   
     SPX has agreed, among other things, that during the period between the
signing of the Merger Agreement and the Effective Time, it will, and will cause
each of its subsidiaries to, conduct its operations in the ordinary course and
use its reasonable best efforts to preserve intact its business organization and
goodwill in all material respects, keep available the services of its officers
and employees as a group, subject to changes in the ordinary course, and
maintain satisfactory relationships with customers, suppliers and other third
parties. The Merger Agreement places restrictions on the ability of SPX (and in
certain cases, of its subsidiaries) to (i) authorize, declare or pay dividends,
or make distributions with respect to its shares of stock, (ii) publicly
announce an intention to authorize or enter into an agreement with respect to
any (a) merger, consolidation or business combination involving aggregate
consideration in excess of $75.0 million, or (b) liquidation or reorganization,
(iii) propose or adopt amendments to its Certificate of Incorporation or By-Laws
that would adversely affect the rights of holders of SPX Common Stock, (iv) take
action with respect to its Rights Agreement, (v) take actions which could
reasonably be expected to cause the Merger to fail to qualify as a
reorganization under Section 368(a) of the Code, (vi) issue shares of its
capital stock, (vii) acquire shares of SPX Common Stock other than transactions
of up to 200,000 shares, (viii) grant options or other rights to acquire any
shares of capital stock of SPX or its subsidiaries, or enter into arrangements
relating to such capital stock, (ix) adopt changes in its accounting principles,
or (x) commit to capital expenditures in excess of $40.0 million.
    
 
     Investigation. SPX and General Signal have agreed to afford to one another
and to one another's officers, employees and other authorized representatives
reasonable access to its and its subsidiaries' (a) plants, properties,
contracts, books and records, (b) documents filed or received by it pursuant to
the requirements of federal or state securities law, and (c) any other
information concerning its business, properties and personnel as may be
reasonably requested. SPX and General Signal agree that each of them will treat
any such information in accordance with the applicable confidentiality agreement
between SPX and General Signal.
 
     Filings. SPX and General Signal have each agreed that none of the
information they supplied for inclusion in the Registration Statement, this
Joint Proxy Statement/Prospectus and certain other documents filed with the
Commission will contain any untrue statement of a material fact or omit to state
a material fact necessary in order to make the statements therein not
misleading. SPX and General Signal have further agreed to cooperate with one
another in connection with obtaining certain tax opinions from each party's
counsel. SPX has further agreed that, prior to the Effective Time, it will use
its reasonable best efforts to cause the shares of SPX Common Stock issuable in
the Merger to be approved for listing on the NYSE and such other stock exchanges
as may be agreed upon.
 
                                       60
<PAGE>   72
 
   
     No Solicitation of Transactions. General Signal has agreed, except as
agreed by SPX, that it will not, and will not permit any of its subsidiaries or
its or its subsidiaries' directors, officers, employees, agents or
representatives, directly or indirectly, to solicit, initiate, encourage or
facilitate, or furnish or disclose non-public information in furtherance of, any
inquiries or the making of any proposal with respect to any recapitalization,
merger, consolidation or other business combination involving General Signal, or
any acquisition of 10% or more of the outstanding capital stock of General
Signal (other than upon exercise of certain General Signal Options and warrants)
or any of its Significant Subsidiaries (as defined in Rule 1-02 of Regulation
S-X of the Commission) or 15% or more of the assets of General Signal and its
subsidiaries, taken as a whole, in a single transaction or a series of related
transactions, or any combination of the foregoing (each, a "Competing
Transaction"), or negotiate or otherwise engage in discussions with any person
with respect to any Competing Transaction, or enter into any agreement,
arrangement or understanding requiring it to abandon, terminate or fail to
consummate the Merger or any other transactions contemplated by the Merger
Agreement, and will immediately cease all existing activities, discussions and
negotiations with any parties conducted with respect to any proposal for a
Competing Transaction. The Merger Agreement provides, however, that, at any time
prior to the approval of the Merger by the General Signal stockholders, General
Signal may furnish information to, and negotiate or otherwise engage in
discussions with, any third party who delivers a bona fide written proposal for
a Competing Transaction which was not solicited or encouraged after the date of
the Merger Agreement and enters into an appropriate confidentiality agreement
with the third party if, but only if, the General Signal Board determines in
good faith by a majority vote, after consultation with and receipt of advice
from its outside legal counsel, that failing to take such action would
constitute a breach of the fiduciary duties of the General Signal Board under
applicable Law and, after consulting with its independent financial advisors,
that such a proposal could reasonably be expected to lead to a "Superior
Transaction." A "Superior Transaction" is defined in the Merger Agreement as a
Competing Transaction which the General Signal Board reasonably determines is
more favorable to General Signal and its stockholders than the transactions
contemplated by the Merger Agreement and which is not subject to any financing
condition.
    
 
     The Merger Agreement provides that, from and after the execution of the
Merger Agreement, General Signal will promptly advise SPX in writing of the
receipt, directly or indirectly, of any inquiries or proposals relating to a
Competing Transaction, and will keep SPX reasonably informed of the status of
any inquiries or proposals, of the furnishing of information to a third party,
and of any negotiations or discussions relating thereto.
 
   
     If, prior to the approval of the Merger by the General Signal stockholders,
the General Signal Board determines in good faith by a majority vote, with
respect to any written proposal from a third party for a Competing Transaction
received after the date of the Merger Agreement that was not solicited,
initiated, encouraged or facilitated by General Signal, directly or indirectly,
after the date of the Merger Agreement, that such Competing Transaction is a
Superior Transaction and is in the best interests of General Signal and its
stockholders and that failure to enter into such Competing Transaction would
constitute a breach of the fiduciary duties of the General Signal Board under
applicable Law, and the General Signal Board has received (i) a written opinion
from General Signal's independent financial advisors that the Competing
Transaction is a Superior Transaction and (ii) the advice of its outside legal
counsel that failure to enter into the Competing Transaction would constitute a
breach of the General Signal Board's fiduciary duties under applicable law, then
General Signal may terminate the Merger Agreement and enter into an acquisition
agreement for the Superior Transaction, provided General Signal (i) provides SPX
two business days' written notice of its intention to do so, identifying the
Superior Transaction and the parties thereto and delivering an accurate
description of all material terms of the Superior Transaction to be entered
into, and (ii) on the date of termination, delivers to SPX a written notice of
termination of the Merger Agreement, a wire transfer of immediately available
funds in the amount of the SPX Termination Fee and Commitment Expenses (defined
below under "-- Termination Fee; Reimbursement of Expenses"), and a written
acknowledgment from General Signal and each other party to the Superior
Transaction that they will not contest the payment of the SPX Termination Fee
and Commitment Expenses.
    
 
                                       61
<PAGE>   73
 
   
     SPX has also agreed that it will not, and will not permit any of its
subsidiaries or its or its subsidiaries' directors, officers, employees, agents
or representatives, directly or indirectly, to solicit or initiate any inquiries
or the making of any proposal with respect to any merger, consolidation or other
business combination as a result of which the SPX stockholders would hold less
than 50% of the voting securities outstanding following that transaction, or the
acquisition of 50% or more of the outstanding capital stock of SPX or of the
assets of SPX and its subsidiaries, taken as a whole (including capital stock of
any subsidiary) (an "SPX Business Combination"), provided that nothing prohibits
SPX from responding to unsolicited inquiries or proposals, including by
furnishing non-public information.
    
 
   
     Indemnification and Insurance. SPX and MergerSub have agreed that all
rights to exculpation and indemnification for acts or omissions occurring at or
prior to the Effective Time now existing in favor of the current or former
directors or officers of General Signal or any of its subsidiaries as provided
in its Certificate of Incorporation or By-Laws or in any agreement will survive
the Merger and continue in full force and effect. SPX has agreed that for six
years from the Effective Time, SPX will indemnify such persons for any such acts
or omissions to the fullest extent permitted by applicable Law and will use its
reasonable best efforts to obtain and maintain in effect, or cause the Surviving
Corporation to obtain and maintain in effect, General Signal's current
directors' and officers' liability insurance covering those persons who are
currently covered by General Signal's insurance policy, provided that SPX will
not be required to pay an annual premium for such insurance in excess of 200% of
the annual premiums currently paid by General Signal, but in that case must
purchase as much coverage as possible for that amount.
    
 
     Benefit Plans. SPX has agreed, from and after the Effective Time, to cause
the Surviving Corporation and its subsidiaries to honor the obligations of
General Signal and its subsidiaries under all existing General Signal employee
benefit plans. Further, SPX has agreed that, for at least one year from the
Effective Time, the Surviving Corporation and its subsidiaries will provide
employee benefits to individuals who are employees of General Signal as of the
Effective Time that are, in the aggregate, comparable to those currently
provided by General Signal and its subsidiaries to their employees (excluding
any stock option or other equity-based compensation plan and any individual
employment, severance or similar agreement currently in effect).
 
     After the Effective Time, SPX will grant, and will cause the Surviving
Corporation to grant, to all individuals who are, as of the Effective Time,
employees of General Signal or its subsidiaries credit for all service with
General Signal or its subsidiaries or affiliates prior to the Effective Time for
purposes of eligibility and vesting (but not benefit accrual), to the extent
that prior service with SPX or its subsidiaries is recognized in respect of
SPX's employees. SPX has generally agreed that any benefit plan providing
medical, dental or life insurance benefits after the Effective Time to General
Signal employees or their dependents shall waive any waiting periods and any
pre-existing conditions and actively-at-work exclusions to the extent waived
under General Signal's present policy and to take into account expenses incurred
prior to the Effective Time for purposes of satisfying applicable deductible or
coinsurance provisions to the extent taken into account under General Signal's
present policy.
 
     General Signal is required to amend all trusts and other funding
arrangements to provide that no event which occurs in connection with the
transactions contemplated by the Merger Agreement will require General Signal,
the Surviving Corporation or any of their affiliates to make any payment of cash
or other property to any such trust or funding arrangement.
 
     Certain Other Covenants. The Merger Agreement contains certain other
covenants and agreements, including covenants and agreements relating to (i)
reasonable best efforts to effect the transactions contemplated by the Merger
Agreement, (ii) the avoidance of actions that would cause the transactions
contemplated by the Merger Agreement to be subject to certain takeover laws,
(iii) public announcements relating to the Merger, the Merger Agreement and the
transactions contemplated thereby, and (iv) notification of facts, events or
circumstances that are reasonably likely to result in a Material Adverse Effect
with respect to SPX or General Signal or that would cause a material breach of
provisions of the Merger Agreement.
 
                                       62
<PAGE>   74
 
CONDITIONS
 
     The obligations of SPX, General Signal and MergerSub to effect the Merger
are subject, among other things, to the satisfaction (or waiver, where legally
permissible) of certain conditions, including, without limitation: (i) approval
of the Merger Agreement by the requisite vote of the General Signal stockholders
and approval of the issuance of shares of SPX Common Stock by the requisite vote
of the SPX stockholders; (ii) the listing on the NYSE, subject only to official
notice of issuance, of the shares of SPX Common Stock to be issued in the
Merger; (iii) the receipt of all regulatory approvals required to consummate the
transactions contemplated by the Merger Agreement, and the expiration or
termination of all statutory waiting periods (except for such regulatory
approvals the failure to obtain which are not reasonably likely to result in any
Material Adverse Effect); (iv) the absence of any Law or Decree prohibiting or
making illegal the consummation of any of the transactions contemplated by the
Merger Agreement; (v) the absence of any breaches of any representations or
warranties made in the Merger Agreement which in the aggregate have a Material
Adverse Effect on General Signal or SPX; and (vi) the receipt by General Signal
from Wachtell, Lipton, Rosen & Katz, and by SPX from Fried, Frank, Harris,
Shriver & Jacobson, of opinions that the Merger will be treated as a
reorganization under Section 368(a) of the Code, which latter condition SPX and
General Signal have agreed not to waive.
 
     The obligations of General Signal to effect the Merger are subject to the
fulfillment of certain additional conditions, including (i) with respect to the
continued accuracy of the representations and warranties of SPX and the
performance of the obligations and covenants of SPX contained in the Merger
Agreement, and (ii) the delivery by SPX to General Signal of a certificate,
dated the date the Merger is consummated and signed by the Chief Executive
Officer or a Vice President of SPX, certifying the satisfaction of the
foregoing.
 
     The obligations of SPX to effect the Merger are subject to the fulfillment
of certain additional conditions, including (i) with respect to the continued
accuracy of the representations and warranties of General Signal and the
performance of the obligations and covenants of General Signal contained in the
Merger Agreement, and (ii) the delivery by General Signal to SPX of a
certificate, dated the date the Merger is consummated and signed by the Chief
Executive Officer or a Vice President of General Signal, certifying the
satisfaction of the foregoing.
 
TERMINATION
 
   
     The Merger Agreement may be terminated and the Merger may be abandoned at
any time prior to the Effective Time (notwithstanding any approval of the Merger
Agreement by the General Signal stockholders or any approval of the SPX Proposal
by the SPX stockholders): (i) by mutual written consent of SPX and General
Signal, (ii) by either SPX or General Signal if the Merger has not been
consummated by December 31, 1998 (but this right will not be available to any
party whose failure to perform under the Merger Agreement resulted in the
failure of the Merger to occur by that date), (iii) by SPX if the General Signal
Board withdraws its recommendation of the Merger or changes it in a manner
adverse to SPX, refuses to affirm its recommendation as promptly as practicable
(but in any case within ten business days) after receipt of any written request
from SPX which request is made on a reasonable basis, or recommends that General
Signal enter into a General Signal Business Combination (as defined below), (iv)
by General Signal if the SPX Board withdraws its recommendation of the Merger or
changes it in a manner adverse to General Signal, refuses to affirm its
recommendation as promptly as practicable (but in any case within ten business
days) after receipt of any written request from General Signal which request is
made on a reasonable basis, or recommends that SPX enter into an SPX Business
Combination, (v) by SPX or General Signal if at the General Signal Special
Meeting the requisite vote of the General Signal stockholders to approve the
Merger Agreement is not obtained, (vi) by SPX or General Signal if at the SPX
Special Meeting the requisite vote of the SPX stockholders to approve the SPX
Proposal is not obtained, (vii) by SPX or General Signal if any Law or Decree
prohibits or makes illegal the consummation of the Merger, or if any final
non-appealable Decree enjoining SPX or General Signal from consummating the
Merger is entered, (viii) by SPX or General Signal if there is a material breach
by the other party of its representations, warranties, covenants or agreements
in the Merger Agreement, which breach would result in the failure to satisfy any
of the conditions set forth in the Merger Agreement, and which breach is not
cured within 30 days after written notice thereof, and (ix) by
    
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<PAGE>   75
 
   
General Signal, in order to enter into a Superior Transaction, provided it has
complied with the applicable provisions of the Merger Agreement and has paid the
SPX Termination Fee and the Commitment Fees.
    
 
TERMINATION FEE; REIMBURSEMENT OF EXPENSES
 
   
     SPX is entitled to receive a termination fee of $60.0 million (the "SPX
Termination Fee") (less any Expense Fee, as defined below, previously received
by it), in the event that the Merger Agreement is terminated under any of the
following circumstances: (i) SPX terminates the Merger Agreement pursuant to
clause (iii) under "-- Termination"; (ii) SPX or General Signal terminates the
Merger Agreement because the General Signal stockholders fail to approve the
Merger, and there is publicly proposed or announced after July 19, 1998 a
General Signal Business Combination and, within 12 months after termination of
the Merger Agreement, General Signal or any of its subsidiaries enters into or
consummates a General Signal Business Combination; (iii) General Signal
terminates the Merger Agreement pursuant to clause (ix) under "-- Termination";
or (iv) SPX or General Signal terminates the Merger Agreement because the
General Signal stockholders fail to approve the Merger or SPX terminates the
Merger Agreement because General Signal has committed a material breach of the
Merger Agreement which breach arises out of its bad faith or willful misconduct,
and a General Signal Business Combination is entered into or consummated by
General Signal within three months following such termination of the Merger
Agreement.
    
 
   
     General Signal is entitled to receive a termination fee of $25.0 million
(less any Expense Fee previously received by it) in the event that the Merger
Agreement is terminated under any of the following circumstances: (i) General
Signal terminates the Merger Agreement pursuant to clause (iv) under
"-- Termination," or (ii) SPX or General Signal terminates the Merger Agreement
because the SPX stockholders fail to approve the SPX Proposal, and there is
publicly proposed or announced after July 19, 1998 an SPX Business Combination
with a third party and, within 12 months after termination of the Merger
Agreement, SPX or any of its subsidiaries enters into or consummates an SPX
Business Combination with such third party or an affiliate thereof.
    
 
   
     If SPX or General Signal terminates the Merger Agreement because the
General Signal stockholders fail to approve the General Signal Proposal, then
General Signal will pay to SPX, and if SPX or General Signal terminates the
Merger Agreement because the SPX stockholders fail to approve the SPX Proposal,
then SPX will pay to General Signal, an expense fee of $5.0 million (the
"Expense Fee"). Further, if SPX terminates the Merger Agreement pursuant to
clause (iii), (v), or (viii) under "-- Termination," or if General Signal
terminates the Merger Agreement pursuant to clause (v) or (ix) under
"-- Termination," then General Signal also will pay to SPX all amounts incurred
by SPX or MergerSub in respect of fees and payments to obtain the financing
commitments for the Merger Financing, up to the amounts set forth in the fee
letter dated July 19, 1998, and related expenses of the lenders (the "Commitment
Expenses"). If the Merger Agreement is terminated by SPX or General Signal
pursuant to clause (ii) or (vii) under "-- Termination," then General Signal
will pay to SPX the lesser of one-half of the Commitment Expenses or $5.0
million.
    
 
     If either SPX or General Signal fails to pay promptly any fee payable by it
under the termination and expense reimbursement provisions of the Merger
Agreement, then the party owing the fee will pay to the party owed the fee the
latter's costs and expenses in connection with any lawsuit to collect the fee,
along with interest on the amount of the fee at the prime or base rate of The
Chase Manhattan Bank.
 
EXPENSES
 
   
     Subject to the provisions of the Merger Agreement relating to termination
fees and expenses, all costs and expenses incurred in connection with the Merger
Agreement and the transactions contemplated thereby will be paid by the party
incurring such expenses, except that the expenses incurred in connection with
filing the Registration Statement and printing and mailing this Joint Proxy
Statement/Prospectus (including registration and filing fees related thereto)
will be shared equally by SPX and General Signal, and, if the Merger is
consummated, all transfer taxes will be paid by General Signal.
    
 
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<PAGE>   76
 
             CERTAIN FEDERAL INCOME TAX CONSEQUENCES OF THE MERGER
 
     The following is a discussion of certain material federal income tax
consequences of the Merger to SPX, General Signal and the holders of General
Signal Common Stock who are citizens or residents of the United States or who
are domestic corporations. This discussion is for general information only and
does not purport to address all tax consequences of the Merger. The summary may
not apply to General Signal stockholders in special situations (such as dealers
in securities or currencies, traders in securities, financial institutions, tax-
exempt organizations, insurance companies, persons holding shares of General
Signal Common Stock as part of a hedging, "straddle," conversion or other
integrated transaction, non-United States persons, persons whose functional
currency is not the United States dollar or persons who acquired their shares of
General Signal Common Stock pursuant to the exercise of employee stock options
or warrants, or otherwise as compensation). The discussion assumes that the
shares of General Signal Common Stock are held as capital assets. In addition,
no information is provided herein with respect to the tax consequences of the
Merger under applicable foreign, state or local laws.
 
     Neither General Signal nor SPX has requested a ruling from the Internal
Revenue Service ("IRS") with regard to any of the federal income tax
consequences of the Merger, and the opinions of counsel to General Signal and
counsel to SPX as to the federal income tax consequences of the Merger to be
delivered as conditions to the Merger will not be binding on the IRS.
 
   
     Tax Opinion. As conditions to the Merger (which conditions SPX and General
Signal have agreed may not be waived), SPX must receive an opinion of Fried,
Frank, Harris, Shriver & Jacobson, special counsel to SPX, and General Signal
must receive an opinion of Wachtell, Lipton, Rosen & Katz, special counsel to
General Signal, subject to the assumptions set forth below, to the effect that,
based upon present federal income tax law, the Merger will constitute a
reorganization pursuant to Section 368(a) of the Code. Assuming that the Merger
is a reorganization, (i) none of SPX, General Signal or MergerSub will recognize
gain or loss as a result of the Merger, (ii) the General Signal stockholders
that exchange their shares of General Signal Common Stock solely for shares of
SPX Common Stock will not recognize gain or loss in the Merger, and (iii) the
General Signal stockholders that exchange their shares of General Signal Common
Stock for shares of SPX Common Stock and cash will recognize gain, if any, in
the Merger but not in excess of the amount of cash received.
    
 
     Such opinions will be based on (i) certain representations and statements
of SPX, General Signal and MergerSub, (ii) the assumption that such
representations and statements will be complete and accurate as of the Effective
Time, and (iii) the assumption that the Merger and related transactions will
take place in accordance with all of the terms of the Merger Agreement and as
described in this Joint Proxy Statement/ Prospectus.
 
     The following discussion addresses certain federal income tax consequences
of the Merger to a General Signal stockholder, assuming that the Merger will
qualify as a reorganization.
 
ONLY SHARES OF SPX COMMON STOCK RECEIVED
 
     Except as discussed below with respect to cash received in lieu of a
fractional share of SPX Common Stock, a General Signal stockholder that receives
only shares of SPX Common Stock in exchange for such holder's shares of General
Signal Common Stock will not recognize gain or loss. The tax basis of the shares
of SPX Common Stock received in the Merger will be the same as the tax basis of
the shares of General Signal Common Stock exchanged therefor. The holding period
of the shares of SPX Common Stock received will include the holding period of
shares of General Signal Common Stock exchanged therefor.
 
ONLY CASH RECEIVED
 
     A General Signal stockholder that receives solely cash in the Merger in
exchange for such stockholder's shares of General Signal Common Stock generally
will recognize capital gain or loss measured by the difference between the
amount of cash received with respect to each share of General Signal Common
Stock and the tax basis of each such share of General Signal Common Stock
exchanged therefor. If, however, any
 
                                       65
<PAGE>   77
 
   
such stockholder actually or constructively owns shares of SPX Common Stock
after the Merger (as the result of constructive ownership of shares of General
Signal Common Stock that are exchanged for shares of SPX Common Stock in the
Merger, prior, actual or constructive ownership of shares of SPX Common Stock,
or otherwise), the cash received by such stockholder may, in certain
circumstances, be taxed as a dividend. The circumstances under which dividend
treatment may apply and the consequences thereof are similar to those discussed
under "-- Shares of SPX Common Stock and Cash Received -- Treatment of Gain
Recognized," except that the amount treated as a dividend would not be limited
to the amount of such stockholder's gain realized in the transaction, and it is
possible that there would be some variation in the manner in which the 302
Tests, as defined below, would be applied. See also "Shares of SPX Common Stock
and Cash Received -- Effect of Overlapping or Constructive Ownership," for a
general discussion of the effect of a stockholder's overlapping ownership on the
dividend/capital gain issue.
    
 
SHARES OF SPX COMMON STOCK AND CASH RECEIVED
 
   
     General. Except as discussed below with respect to cash received in lieu of
a fractional share of SPX Common Stock, a General Signal stockholder that
receives both shares of SPX Common Stock and cash in exchange for shares of
General Signal Common Stock will not recognize loss in such exchange. However,
under Section 356(a)(1) of the Code, the stockholder will recognize gain (if
any) with respect to each share of General Signal Common Stock exchanged
(measured by the sum of the fair market value of the portion of a share of SPX
Common Stock received for such share of General Signal Common Stock, plus the
amount of any cash received for such share of General Signal Common Stock, minus
the tax basis of such share of General Signal Common Stock) but only to the
extent of the amount of any cash received in exchange for such share of General
Signal Common Stock. A General Signal stockholder may receive both shares of SPX
Common Stock and cash as the result of (i) making a Mixed Election, (ii) making
a Stock Election and being prorated (if the Stock Election is oversubscribed),
(iii) making a Cash Election and being prorated (if the Cash Election is
oversubscribed), or (iv) failing to make any Election.
    
 
   
     Treatment of Gain Recognized. Under applicable Supreme Court precedent, any
such gain recognized will be taxed as either gain from the sale or exchange of
stock (i.e., capital gain) or as a dividend (to the extent of the stockholder's
ratable share of earnings and profits), based upon whether, in the transaction
described in the next sentence, such stockholder's interest in SPX was reduced
sufficiently so as to meet one of the tests set forth in Section 302(b) of the
Code, as described below. For purposes of this determination, a General Signal
stockholder will be treated as if such stockholder had engaged in a hypothetical
transaction in which such stockholder and all other General Signal stockholders
(i) received solely shares of SPX Common Stock in exchange for all of their
shares of General Signal Common Stock, and (ii) thereafter had a portion of such
shares of SPX Common Stock redeemed for the cash portion of the Merger
Consideration. A General Signal stockholder's hypothetical interest in SPX after
step (i) is compared to such stockholder's interest in SPX subsequent to the
deemed redemption in step (ii). In each case, subject to limited exceptions,
shares of SPX Common Stock actually or constructively owned (under the
constructive ownership rules described in "-- Effect of Overlapping or
Constructive Ownership" below) by such stockholder will be considered owned for
purposes of applying this test, even if such shares of SPX Common Stock were not
received or deemed received in the Merger.
    
 
   
     Under Section 302(b) of the Code, a stockholder's interest in SPX will be
deemed to have been reduced sufficiently if, insofar as is here pertinent, (i)
such stockholder's interest in SPX is completely terminated as a result of the
transaction, (ii) a stockholder's percentage interest in SPX is reduced more
than 20% in the redemption described above (the "20% safe harbor"), or (iii)
such stockholder's interest was "meaningfully reduced" by virtue of such
redemption (such tests, the "302 Tests"). While prong (iii) of the 302 Tests
requires a determination based on a stockholder's particular facts and
circumstances, the IRS has indicated in published rulings that a distribution
that results in any actual reduction in interest of an extremely small, minority
stockholder in a publicly held corporation will meaningfully reduce the
stockholder's interest in the corporation if the stockholder exercises no
control with respect to corporate affairs.
    
 
     Application of 302 Tests -- General. The discussion which follows considers
the application of the 302 Tests to a stockholder that receives a combination of
cash and SPX Common Stock as the result of making
                                       66
<PAGE>   78
 
   
(i) a Mixed Election or (ii) a Cash Election or a Stock Election which is
oversubscribed (and hence subject to proration).
    
 
   
     The application of the 302 Tests in these cases will depend upon, in
addition to the type of Election made by the stockholder, the extent to which
(i) the cash or stock portion of the Merger Consideration is oversubscribed,
(ii) the stockholder actually or constructively owns after the Merger any shares
of SPX Common Stock which such stockholder did not receive, actually or
constructively, in the Merger (e.g., shares of SPX Common Stock which it owned
actually or constructively before the Merger), and (iii) the stockholder
constructively owns shares of General Signal Common Stock immediately prior to
the Effective Time. The discussions, under "-- Cash Elections," "-- Mixed
Elections" and "-- Stock Elections," below, do not consider the effect of such
constructive or overlapping ownership, which is, however, discussed below in
"-- Effect of Overlapping or Constructive Ownership." Moreover, the statements
below relating to the extent of a stockholder's reduction in interest in SPX
under the 302 Tests are based upon certain mathematical assumptions as to the
relative values of the cash portion of the Merger Consideration and the stock
portion of the Merger Consideration, which assumptions may not be completely
accurate as of the Effective Time. Therefore, the General Signal stockholders
should consult their own tax advisors as to the risk of dividend
characterization with respect to any cash received in the Merger.
    
 
     - Cash Elections. If the cash portion of the Merger Consideration is
oversubscribed (and therefore a portion of the consideration received under a
Cash Election is SPX Common Stock), a General Signal stockholder making a Cash
Election will have its interest in SPX reduced for purposes of the 302 Tests,
although if the Cash Election is heavily oversubscribed the reduction may not
qualify for the 20% safe harbor. The treatment of General Signal stockholders
making Cash Elections where the cash portion of the Merger Consideration is not
oversubscribed is addressed above in "-- Only Cash Received."
 
   
     - Mixed Elections. A General Signal stockholder that makes a Mixed Election
will, for purposes of the 302 Tests, (i) if the stock portion of the Merger
Consideration is oversubscribed, have its interest reduced but by an amount
which may or may not qualify under the 20% safe harbor, (ii) if neither the
stock portion nor the cash portion of the Merger Consideration is
oversubscribed, have its interest in SPX reduced but by an amount which will
generally be less than that necessary to qualify under the 20% safe harbor, and
(iii) if the cash portion of the Merger Consideration is oversubscribed,
generally not qualify under the 20% safe harbor, and if it is substantially
oversubscribed may not have any reduction in its interest in SPX and as a result
be subject to dividend treatment.
    
 
   
     - Stock Elections. If the stock portion of the Merger Consideration is
oversubscribed (and therefore a portion of the consideration received under a
Stock Election is cash), a General Signal stockholder that makes a Stock
Election will be subject to dividend treatment, unless the extent of such
oversubscription is very substantial. The treatment of General Signal
stockholders making Stock Elections where the stock portion of the Merger
Consideration is not oversubscribed is addressed above in " -- Only Shares of
SPX Common Stock Received."
    
 
   
     Effect of Overlapping or Constructive Ownership. A General Signal
stockholder that (i) actually or constructively owns after the Merger any shares
of SPX Common Stock which such stockholder did not receive, actually or
constructively in the Merger (e.g., shares of SPX Common Stock which such
stockholder owned actually or constructively before the Merger), or (ii)
constructively owns shares of General Signal Common Stock immediately prior to
the Effective Time or shares of SPX Common Stock immediately after the Effective
Time, will be required to take such shares into account for purposes of applying
the 302 Tests. Under the applicable constructive ownership rules of Section 318
of the Code, a stockholder will, in general, be treated as owning shares owned
by certain family members and other related entities, or that are subject to
options owned or deemed owned by such person. The actual or constructive
ownership of such shares of General Signal Common Stock may, in some
circumstances, have the effect of causing a General Signal stockholder that
would otherwise qualify for capital gain treatment under the 302 Tests to fail
to so qualify and subject such stockholder to dividend treatment on the cash
portion of the Merger Consideration (to the extent of the stockholder's ratable
share of earnings and profits), even if such stockholder receives solely cash in
the Merger. Therefore, General Signal stockholders who (i) constructively own
shares of General Signal
    
 
                                       67
<PAGE>   79
 
Common Stock, or (ii) actually or constructively own shares of SPX Common Stock,
should consult their tax advisors as to the tax consequences of receiving cash,
whether such stockholder intends to make a Cash Election, Stock Election or
Mixed Election.
 
   
     Treatment of Dividends to Corporate Stockholders. To the extent that cash
received in exchange for shares of General Signal Common Stock is treated as a
dividend to a corporate stockholder, such stockholder will be (i) eligible for a
dividends received deduction (subject to applicable limitations), and (ii)
subject to the "extraordinary dividend" provisions of the Code. Under recently
enacted legislation, any cash which is treated as a dividend to a corporate
stockholder will constitute an extraordinary dividend, except as otherwise
provided in Treasury regulations which have yet to be promulgated. Consequently,
the non-taxed portion of any such dividend would reduce a corporate
stockholder's adjusted tax basis in the shares of SPX Common Stock received in
the Merger, but not below zero, and would thereafter be taxable as capital gain.
    
 
   
     Tax Basis and Holding Period of Shares of SPX Common Stock Received in the
Merger. The tax basis of each share of SPX Common Stock received in the Merger
will be the same as the tax basis of the shares of General Signal Common Stock
exchanged therefor, increased by the amount of gain recognized on the exchange
with respect to such shares of General Signal Common Stock (including any such
gain that is treated as a dividend), decreased by any portion of such shares of
General Signal Common Stock which is converted into cash in lieu of receipt of a
fractional share of SPX Common Stock, and further decreased by the amount of
cash received with respect to such shares of General Signal Common Stock (other
than cash received in lieu of a fractional share interest). As discussed above,
corporate stockholders are subject to special adjustments with respect to the
portion of any cash received in the Merger which is taxable as a dividend. See
"-- Treatment of Dividends to Corporate Stockholders." The holding period of the
shares of SPX Common Stock received will include the holding period of the
shares of General Signal Common Stock exchanged therefor.
    
 
FRACTIONAL SHARES
 
     If a General Signal stockholder receives cash in lieu of a fractional share
of SPX Common Stock in the Merger, such cash amount will be treated as received
in exchange for the fractional share of SPX Common Stock. Gain or loss
recognized as a result of that exchange will be equal to the cash amount
received for the fractional share of SPX Common Stock reduced by the proportion
of the stockholder's tax basis in shares of General Signal Common Stock
exchanged and allocable to the fractional share of SPX Common Stock.
 
     THE PRECEDING DISCUSSION IS INTENDED ONLY AS A SUMMARY OF CERTAIN FEDERAL
INCOME TAX CONSEQUENCES OF THE MERGER AND DOES NOT PURPORT TO BE A COMPLETE
ANALYSIS OR DISCUSSION OF ALL POTENTIAL TAX EFFECTS RELEVANT THERETO. THUS,
GENERAL SIGNAL STOCKHOLDERS ARE URGED TO CONSULT THEIR OWN TAX ADVISORS AS TO
THE SPECIFIC TAX CONSEQUENCES TO THEM OF THE MERGER, INCLUDING TAX RETURN
REPORTING REQUIREMENTS, THE APPLICABILITY AND EFFECT OF FEDERAL, STATE, LOCAL,
AND OTHER APPLICABLE TAX LAWS AND THE EFFECT OF ANY PROPOSED CHANGES IN THE TAX
LAWS.
 
   
         AMENDMENT OF THE SPX CORPORATION 1992 STOCK COMPENSATION PLAN
    
 
   
GENERAL
    
 
   
     On April 28, 1993, SPX's stockholders approved the adoption of the 1992
Plan. The 1992 Plan was amended on December 11, 1996 and December 10, 1997. As
of August 26, 1998 and prior to the amendment described below, there were
483,819 shares of SPX Common Stock available for future awards under the 1992
Plan.
    
 
   
SPX PLAN AMENDMENT PROPOSAL
    
 
   
     On August 26, 1998, the SPX Board adopted, subject to stockholder approval,
an amendment to the 1992 Plan to increase the number of shares of SPX Common
Stock available for issuance under the 1992 Plan by
    
                                       68
<PAGE>   80
 
   
1.1 million to an aggregate of 3.0 million shares. At the SPX Special Meeting,
stockholders of SPX are being asked to consider and vote upon the SPX Plan
Amendment Proposal, namely the proposal to approve the amendment of the 1992
Plan adopted by the SPX Board on August 26, 1998.
    
 
   
     Success of SPX depends, in large part, on its ability to attract, retain
and motivate key employees with experience and ability. The SPX Board believes
that the opportunity to receive stock-based incentives under the 1992 Plan
provides an important incentive to key employees of SPX and that the 1992 Plan
will continue to assist SPX in attracting and retaining quality personnel.
Furthermore, if the Merger is consummated, the pool of key employees will be
significantly expanded. Accordingly, the SPX Board believes that it is in the
best interests of SPX to increase the maximum number of shares available for
issuance under the 1992 Plan in order (i) to continue to attract and retain key
employees (including key employees of General Signal who continue as employees
of the combined company after the Merger is consummated) and (ii) to provide
additional incentive and reward opportunities to current employees (including
such General Signal employees) to encourage them to enhance the profitable
growth of SPX. Accordingly, the SPX Board recommends that SPX stockholders vote
"FOR" approval of the SPX Plan Amendment Proposal.
    
 
   
     If the SPX Plan Amendment Proposal is approved, the amendment of the 1992
Plan will become effective as of August 26, 1998. If the SPX Plan Amendment
Proposal is not approved by the SPX stockholders, the 1992 Plan will remain in
effect with the terms existing prior to August 26, 1998. If the SPX Plan
Amendment Proposal is approved, it is expected that the SPX Compensation
Committee (as defined herein) will make periodic grants under the 1992 Plan in
furtherance of the goals described herein.
    
 
   
THE 1992 PLAN
    
 
   
     The following is a brief summary of certain provisions of the 1992 Plan, as
amended, a copy of which is attached as Appendix D to this Joint Proxy
Statement/Prospectus and is incorporated herein by reference. This summary is
qualified in its entirety by reference to the full text of the 1992 Plan.
    
 
   
     The 1992 Plan allows the SPX Compensation Committee to grant awards to key
employees of incentive stock options, non-qualified stock options, stock
appreciation rights, restricted stock and performance units.
    
 
   
     Administration. The 1992 Plan is administered by the Compensation Committee
of the SPX Board (the "SPX Compensation Committee"), as appointed by the SPX
Board from among those directors who are not employees of SPX and who are
"non-employee directors" within the meaning of Rule 16b-3 of the Exchange Act.
To the extent necessary for any award to qualify as performance-based
compensation under Section 162(m) of the Code, each member of the SPX
Compensation Committee will also be an "outside director" within the meaning of
Section 162(m). The SPX Compensation Committee has the authority to determine
award eligibility, timing, and the type, amount and terms of such awards. The
SPX Compensation Committee is also authorized to interpret the 1992 Plan, to
establish rules and regulations thereunder and to make all other determinations
necessary or advisable for the 1992 Plan's proper administration.
    
 
   
     The SPX Board may terminate, amend or modify the 1992 Plan at any time;
provided, however, that the SPX Board may not, without the approval of the SPX
stockholders, increase the total amount of SPX Common Stock which may be issued
under the 1992 Plan (except as specifically provided in Section 5 of the 1992
Plan); change the provisions of the 1992 Plan regarding the option price (except
as permitted by Section 5 of the 1992 Plan); materially increase the cost of the
1992 Plan or materially increase the benefits to 1992 Plan participants; extend
the period during which awards may be granted; or extend the maximum period
after the date of grant during which options or stock appreciation rights may be
exercised. In addition, no amendment, modification or termination of the 1992
Plan shall adversely affect any outstanding award previously granted under the
1992 Plan without the consent of the participant to whom such award was made.
    
 
   
     Eligibility. Participants in the 1992 Plan are selected by the SPX
Compensation Committee from among those employees of SPX, or any
50%-or-more-owned subsidiary of SPX, who, in the opinion of the SPX Compensation
Committee, are in a position to contribute materially to SPX's long-term growth,
development and continued financial success. Awards may also be made under the
1992 Plan to recognize or foster extraordinary performance, promotion, retention
or recruitment. As of July 31, 1998, there were
    
 
                                       69
<PAGE>   81
 
   
approximately 115 participants in the 1992 Plan. Because persons eligible to
participate in the 1992 Plan and awards to those persons are determined by the
SPX Compensation Committee, the number of employees that will be eligible to
participate in the future, and the amounts of any awards to be granted, cannot
now be determined. However, if the Merger is consummated and as a consequence
the pool of eligible employees is increased, SPX expects that a portion of the
additional 1.1 million shares made available pursuant to the SPX Plan Amendment
Proposal will be utilized during SPX's next regularly scheduled series of option
awards in December 1998.
    
 
   
     Shares Available for the 1992 Plan. The total number of shares of SPX
Common Stock subject to awards under the 1992 Plan currently may not exceed 1.9
million shares (3.0 million as proposed to be amended), of which no more than
200,000 shares may be granted in the form of restricted stock. The maximum
number of shares of SPX Common Stock underlying awards made to a participant in
a fiscal year is 100,000 shares. If any award granted under the 1992 Plan or its
predecessor terminates or lapses, the shares reserved for those awards will be
available again for the grant of awards under the terms of the 1992 Plan. In the
event of any change in the outstanding shares of SPX Common Stock by reason of a
stock dividend or split, recapitalization, merger, consolidation or other
similar corporate change, the aggregate number of shares of SPX Common Stock
subject to each outstanding option, and its stated option price, shall be
appropriately adjusted by the SPX Compensation Committee. Upon such an event,
the SPX Compensation Committee may also make appropriate adjustments to any
other outstanding awards under the 1992 Plan.
    
 
   
     Stock Options. The SPX Compensation Committee may grant stock options to
key employees in the form of incentive stock options (within the meaning of
Section 422 of the Code), non-qualified stock options or any combination
thereof. The per share exercise price cannot be less than the fair market value
of SPX Common Stock on the date of grant. Options may be made exercisable during
any specified period of time following the date of grant (as evidenced in the
option agreement required to be delivered to a participant in respect of an
award), but in no event may the exercise period exceed ten years. Upon exercise,
payment of the exercise price may be made (i) in cash, (ii) by tendering
previously owned SPX Common Stock with a fair market value equal to the exercise
price, (iii) by directing SPX to withhold shares of SPX Common Stock with a fair
market value equal to the exercise price, (iv) by delivering other approved
property or (v) by a combination of the foregoing methods. Incentive stock
options may not be granted to employees owning, either directly or indirectly,
more than 10% of the combined voting power of SPX Common Stock. In addition,
upon the exercise of non-qualified stock options (and upon the lapse of
restrictions on awards of restricted stock, see below), participants may elect
(subject to the approval of the SPX Compensation Committee) to satisfy any tax
withholding obligations by (i) having SPX withhold shares of SPX Common Stock
equal in value to such obligations or (ii) tendering to SPX shares of SPX Common
Stock equal in value to such obligations. The aggregate fair market value (as of
the date of grant) of the SPX Common Stock with respect to which incentive stock
options are exercisable for the first time during any particular calendar year
may not exceed $100,000. If employment is terminated due to death, disability or
retirement, each outstanding option shall vest and become immediately
exercisable and shall remain so during a period as shall be determined by the
SPX Compensation Committee but in no event beyond the expiration of the term of
the option. If employment is terminated for any other reason, the participant
may exercise any outstanding option within such period as shall be determined by
the SPX Compensation Committee, but in no event beyond the expiration of the
term of the option and only to the extent such option was exercisable on the
date of the participant's termination of employment.
    
 
   
     Upon the exercise of options, the SPX Compensation Committee may also grant
replacement options under the 1992 Plan to purchase additional shares of SPX
Common Stock. The amount of shares subject to a replacement option, if granted,
shall be equal to the number of shares delivered by the participant (or withheld
by SPX) in satisfaction of the exercise price and the tax withholding
obligations of the exercised option. The replacement option will be a
non-qualified option and will be subject to terms and conditions identical to
the exercised option, except that the per share exercise price of the
replacement option will be equal to the fair market value of the SPX Common
Stock on the date of grant of the replacement option.
    
 
   
     Stock Appreciation Rights. The SPX Compensation Committee may grant stock
appreciation rights to key employees either in conjunction with the awarding of
non-qualified stock options or on an independent
    
                                       70
<PAGE>   82
 
   
stand-alone basis. Each stock appreciation right allows the holder to elect to
receive payment from SPX equal to the excess of the fair market value of a share
of SPX Common Stock at the date of exercise of the right over the exercise price
of the right. Where a stock appreciation right is granted in conjunction with a
non-qualified option, the exercise by a participant of a stock appreciation
right will reduce the number of such participant's related non-qualified stock
options proportionately. Such rights may be exercised at any time during the
life of the related stock option. Stand-alone rights may be exercised during a
period not to exceed ten years, as determined by the SPX Compensation Committee.
Upon exercise of a stock appreciation right, payment will be made by SPX in
cash. At the time of grant, SPX may establish a maximum amount per share that
will be payable upon exercise of a right. If employment is terminated due to
death, disability, retirement or any other reason, any outstanding rights
(whether stand-alone or granted in conjunction with a non-qualified option)
shall be exercisable according to the same rules as those described above for
options. In the event of a merger or consolidation of SPX in which SPX is not
the surviving corporation, each participant under the 1992 Plan shall be offered
a firm commitment whereby the surviving corporation will grant new options and
stock appreciation rights to the participant which will preserve the rights of
the participant under awards then outstanding under the 1992 Plan.
    
 
   
     Restricted Stock. The SPX Compensation Committee may grant shares of SPX
Common Stock to a participant which shall include restrictions on ownership for
a stated period of time during which the participant will not be able to sell,
exchange, transfer, pledge, design or otherwise dispose of the restricted
shares. However, in the event of a merger or consolidation of SPX in which SPX
is not the surviving corporation, all restrictions shall immediately lapse. Upon
lapse of the restriction period, shares become freely transferable, with
complete ownership vested in the participant. If a participant's employment is
terminated during the restriction period due to death, disability or normal
retirement (as defined under the then established rules of SPX), all
restrictions shall automatically terminate and the shares shall become freely
transferable. If employment is terminated involuntarily during the restriction
period or due to early retirement (as defined under the then established rules
of SPX), the SPX Compensation Committee may waive the restrictions on any or all
restricted shares held by the participant and add any new restrictions that the
SPX Compensation Committee deems appropriate. If the SPX Compensation Committee
does not waive the restrictions, or if employment is terminated for any other
reason, the shares are automatically forfeited by the participant and revert to
SPX. During the restriction period, participants may exercise full voting rights
and are entitled to receive all dividends and other distributions paid with
respect to the restricted shares. Any such dividends or distributions will be
subject to the same restrictions as the underlying shares of restricted stock.
    
 
   
     Performance Units. The SPX Compensation Committee may grant performance
units subject to such terms and conditions as the SPX Compensation Committee in
its discretion shall determine. Performance units may be granted either in the
form of cash units or in share units which are equal in value to one share of
SPX Common Stock. The SPX Compensation Committee shall establish the performance
goals to be attained in respect of the units, various percentages of performance
unit value to be paid out upon the attainment, in whole or in part, of the
performance goals and such other performance unit terms, conditions and
restrictions as the SPX Compensation Committee shall deem appropriate. As soon
as practicable after the termination of the performance period, the SPX
Compensation Committee shall determine the payment, if any, which is due on the
performance units in accordance with the terms thereof, and whether the payment
of the cash units and share units shall be made in the form of cash or shares of
SPX Common Stock, or a combination thereof.
    
 
   
     Transferability. No stock option, stock appreciation right, restricted
stock or performance unit granted under the 1992 Plan may be sold, transferred,
pledged, assigned or otherwise alienated or hypothecated, other than by will or
by the laws of descent and distribution. However, the SPX Compensation Committee
may adopt rules and procedures to permit participants to transfer options to
members of their immediate families or to certain trusts or partnerships,
subject to conditions set forth in the 1992 Plan.
    
 
   
     Effective Date and Duration. The 1992 Plan was effective as of December 15,
1992. No awards will be granted under the 1992 Plan after December 15, 2002.
    
 
                                       71
<PAGE>   83
 
   
     Certain Award Information. Set forth in the table below is information
regarding options outstanding under the 1992 Plan as of July 31, 1998. There are
no stock appreciation rights, restricted stock awards or performance units
outstanding under the 1992 Plan.
    
 
   
<TABLE>
<CAPTION>
                                                                NUMBER OF
                                                              STOCK OPTIONS
                                                              -------------
<S>                                                           <C>
John B. Blystone, Chairman, President and Chief Executive
  Officer...................................................     130,000
Patrick J. O'Leary, Vice President -- Finance, Treasurer and
  Chief Financial Officer...................................      35,000
James M. Sheridan, Vice President, Secretary and General
  Counsel (until February 26, 1997), Counsel to CEO (until
  retirement on January 31, 1998)...........................      93,166
Christopher J. Kearney, Vice President, Secretary and
  General Counsel...........................................      50,000
Stephen A. Lison, Vice President, Human Resources...........      62,186
Thomas J. Riordan, Vice President and President Services
  Solutions.................................................      47,868
All current executive officers as a group (8 persons).......     418,018
All current directors who are not executive officers as a
  group (7 persons).........................................      55,944
All employees, including all current officers who are not
  executive officers as a group (100 persons)...............     431,295
</TABLE>
    
 
   
     Tax Consequences. Under the present federal income tax laws, awards under
the 1992 Plan will have the following consequences:
    
 
   
     For incentive stock options, a 1992 Plan participant will incur no income
tax liability upon grant or exercise, provided the participant, at all times
during the period beginning on the date of the grant of the option and ending on
the date three months before the date of exercise, was an employee of SPX or one
if its subsidiaries. The "spread" between the option price and the SPX Common
Stock's fair market value at exercise, however, is an adjustment for purposes of
the alternative minimum tax. Income tax on the SPX Common Stock's appreciation
is deferred until the shares are actually sold by the participant. Upon the sale
of the shares, the participant will realize long-term capital gain (or loss) if
the date of sale is at least two years after the date of grant of the option and
the shares have been held by the participant for at least one year. The capital
gain (or loss) will be measured by the difference between the selling price of
the shares and the option price. If these holding-period requirements are not
satisfied, the participant will at the time of sale (or other disqualifying
disposition) recognize ordinary income (treated as compensation) equal to the
lesser of (a) the gain realized on the sale (or other disqualifying
disposition), or (b) the difference between the option price and the fair market
value of the shares on the date of exercise. Any additional gain will be treated
as short-term or long-term capital gain, depending on whether the shares have
been held for at least 12 months after the date of exercise. If the participant
does not satisfy the employment requirement described in the first sentence of
this paragraph, the participant will recognize ordinary income (treated as
compensation) at the time of exercise under the tax rules governing the exercise
of a non-qualified stock option described below. SPX will be entitled to an
income tax deduction only if and to the extent that a participant realizes
ordinary income.
    
 
   
     For non-qualified stock options, there are no tax consequences to SPX or to
the participant upon grant. Upon exercise, the participant will recognize
ordinary income (treated as compensation) in an amount equal to the spread
between the option price and the SPX Common Stock's fair market value at
exercise. The basis in shares acquired upon exercise will equal the fair market
value of such shares at the time of exercise, and the capital gain holding
period will begin on the date of exercise. SPX will receive a tax deduction upon
exercise of the non-qualified option in an amount equal to the spread.
    
 
   
     For stock appreciation rights, there are no tax consequences to SPX or to
the participant upon grant. Upon exercise, the participant will recognize
ordinary income (treated as compensation) in the amount of the appreciation paid
to the participant. SPX will receive a corresponding deduction in the same
amount. Similarly, performance units are neither taxable to the participant nor
deductible by SPX until any payments are made.
    
 
   
     For restricted stock, the participant will have no taxable income until the
restrictions lapse. At that time, the participant's taxable income (treated as
compensation) and SPX's tax deduction are measured by the then
    
                                       72
<PAGE>   84
 
   
fair market value of the shares. The participant may, however, avoid the delay
in computing the amount of taxable gain by filing with the IRS, within 30 days
after receiving the restricted shares, an election to make the computation at
the time of receipt of the shares.
    
 
   
     Special rules may apply with respect to persons who may be subject to
Section 16(b) of the Exchange Act. Participants who are or may become subject to
Section 16 of the Exchange Act would need to consult with their own tax advisors
in this regard.
    
 
   
     Excise Taxes. Under certain circumstances, the accelerated vesting or
exercise of options in connection with a change in control of SPX might be
deemed an "excess parachute payment" for purposes of the golden parachute tax
provisions of Section 280G of the Code. To the extent it is so considered, a
participant may be subject to a 20% excise tax and SPX may be denied a tax
deduction.
    
 
   
     Section 162(m) of the Code generally disallows a federal income tax
deduction to any publicly held corporation for compensation paid in excess of
$1.0 million in any taxable year to the chief executive officer or any of the
four other most highly compensated executive officers who are employed by SPX on
the last day of the taxable year, but Section 162(m) does not disallow a
deduction for qualified "performance-based compensation," the material terms of
which are disclosed to and approved by stockholders. SPX has structured the 1992
Plan with the intention that compensation resulting from awards thereunder will
qualify as "performance-based compensation" and, if so qualified, will be
deductible by SPX.
    
 
   
     THE SPX BOARD RECOMMENDS THAT THE SPX STOCKHOLDERS VOTE "FOR" APPROVAL OF
THE SPX PLAN AMENDMENT PROPOSAL.
    
 
                            COMPARISON OF RIGHTS OF
                     STOCKHOLDERS OF SPX AND GENERAL SIGNAL
 
     Pursuant to the Merger, holders of General Signal Common Stock (other than
holders who elect, and receive, only cash in respect of their shares) will
become stockholders of SPX and the rights of all such former General Signal
stockholders will thereafter be governed by SPX's Certificate of Incorporation
and By-Laws and the DGCL. The rights of the holders of General Signal Common
Stock are currently governed by General Signal's Certificate of Incorporation
and By-Laws and the NYBCL. Differences between the laws of Delaware, the state
of incorporation of SPX, and those of New York, the state of incorporation of
General Signal, and between SPX's Certificate of Incorporation and By-Laws, on
the one hand, and General Signal's Certificate of Incorporation and By-Laws, on
the other hand, will result in several changes in the rights of stockholders of
General Signal. A summary of the more significant changes is set forth below.
 
   
     The following summary does not purport to be a complete statement of the
rights of stockholders under SPX's Certificate of Incorporation, By-Laws and
other governing instruments and applicable law, as compared with the rights of
General Signal's stockholders under General Signal's Certificate of
Incorporation, By-Laws and other governing instruments and applicable law, or a
complete description of the specific provisions referred to herein. The summary
is qualified in its entirety by reference to the governing corporate instruments
of SPX and General Signal and to the laws of Delaware and New York,
respectively, to which stockholders are referred. For information as to how the
governing corporate instruments of SPX and General Signal may be obtained, see
"Available Information."
    
 
SPECIAL MEETINGS OF STOCKHOLDERS
 
     Under Delaware law, special meetings of the stockholders may be called by
the board of directors or such other persons as may be authorized by the
certificate of incorporation or by-laws. Under SPX's Certificate of
Incorporation and By-Laws, special meetings of the stockholders may be called
only by the Chairman, the President or the SPX Board pursuant to a resolution
approved by a majority of the entire SPX Board.
 
     Under New York law, special meetings of the stockholders may be called by
the board of directors or such other persons as may be authorized by the
certificate of incorporation or by-laws. In addition, if, for a period of one
month after the date fixed by the by-laws for the annual meeting of
stockholders, there is a
 
                                       73
<PAGE>   85
 
failure to elect a sufficient number of directors to conduct the business of the
corporation, the board of directors must call a special meeting of stockholders
for the election of directors. If the board of directors fails to do so, the
holders of ten percent of the votes of the shares entitled to vote in an
election of directors may demand the call of a special meeting for the election
of directors. General Signal's By-Laws provide that the General Signal Board or
the Chairman of the Board may, and, upon the written request of stockholders
owning at least two-thirds of the outstanding shares entitled to vote at the
meeting, the Secretary shall, call a special meeting of stockholders for such
purposes as may be designated in the notice thereof.
 
NUMBER OF DIRECTORS
 
     Under Delaware law, a board of directors shall consist of one or more
directors, with the number fixed by or in the manner provided in the by-laws,
unless the certificate of incorporation fixes the number of directors, in which
case a change in the number of directors may be made only by amendment to the
certificate of incorporation. SPX's Certificate of Incorporation provides that
the number of directors shall be fixed from time to time by or pursuant to the
By-Laws. SPX's By-Laws provide that, except as otherwise fixed pursuant to the
provisions of SPX's Certificate of Incorporation relating to the rights of the
holders of any preferred stock, the number of directors shall be fixed from time
to time by the SPX Board but shall not be less than three. At present, the SPX
Board has eight members.
 
     Under New York law, a board of directors shall consist of one or more
individuals, with the number specified in or fixed in accordance with the
by-laws or by action of the stockholders or of the board of directors under the
specific provisions of a by-law adopted by the stockholders. General Signal's
By-Laws provide that the General Signal Board shall consist of not more than
fifteen members, the number to be as the directors shall from time to time
direct. At present, the General Signal Board has nine members.
 
CLASSIFICATION OF DIRECTORS
 
   
     Under Delaware law, the directors of a corporation may, by the certificate
of incorporation or by an initial by-law, or by a by-law adopted by a vote of
the stockholders, be divided into one, two or three classes. SPX's Certificate
of Incorporation provides that the directors, other than those who may be
elected by the holders of preferred stock, will be classified into three
classes, as nearly equal in number as possible.
    
 
     Under New York law, the certificate of incorporation or the provisions of a
by-law adopted by the stockholders may provide that the directors be divided
into either two, three or four classes, with all classes being as nearly equal
in number as possible. General Signal's By-Laws provide that the directors will
be classified into three classes, all classes being as nearly equal in number as
possible, and no class including less than three directors.
 
REMOVAL OF DIRECTORS
 
     Under Delaware law, in general any director or the entire board of
directors may be removed, with or without cause, by the holders of a majority of
the shares then entitled to vote at an election of directors. However, in the
case of a corporation with a classified board, stockholders may effect such
removal only for cause unless the certificate of incorporation otherwise
provides. SPX's Certificate of Incorporation and By-Laws provide that, subject
to certain rights of holders of preferred stock, any director may be removed
from office only for cause, and only by the affirmative vote of the holders of
80% of the combined voting power of the outstanding shares of stock entitled to
vote in the election of directors, voting together as a single class.
 
     Under New York law, the directors may be removed for cause by vote of the
stockholders or, if the certificate of incorporation or the provisions of a
by-law adopted by the stockholders so provide, by action of the board of
directors. Directors may be removed without cause by vote of the stockholders if
the certificate of incorporation or the by-laws so provide. Under New York law,
an action to procure a judgment removing a director for cause may be brought by
the attorney-general or by the holders of ten percent of the outstanding shares.
General Signal's Certificate of Incorporation provides that a director may be
removed only by the affirmative vote of the holders of two-thirds of all
outstanding shares.
 
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<PAGE>   86
 
FILLING VACANCIES ON THE BOARD OF DIRECTORS
 
     Under Delaware law, the procedure for filling vacancies may be determined
by a provision in the certificate of incorporation. If, at any time, a
corporation should have no directors, Delaware law provides certain mechanisms
to call a special meeting to elect directors. SPX's Certificate of Incorporation
and By-Laws provide that any vacancies on the SPX Board, including those
resulting from any increase in the number of directors, shall be filled by the
majority of the remaining directors then in office, even though less than a
quorum.
 
     Under New York law, vacancies occurring in the board for any reason other
than the removal of directors without cause may be filled by vote of the board
of directors. Vacancies occurring by reason of the removal of directors without
cause may be filled only by vote of the stockholders, unless the certificate of
incorporation or the provisions of a by-law adopted by the stockholders provide
otherwise. General Signal's By-Laws provide that all vacancies may be filled by
the vote of a majority of the directors then in office, although less than a
quorum.
 
PREEMPTIVE RIGHTS
 
     Under Delaware law, preemptive rights are not available to stockholders
unless specifically authorized by the certificate of incorporation. SPX's
Certificate of Incorporation provides that holders of its shares shall not have
any preemptive rights.
 
     Under New York law, with respect to corporations incorporated prior to
February 22, 1998, except as otherwise provided in the certificate of
incorporation, the holders of equity shares of any class of stock, in case of
the proposed issuance by the corporation of or the proposed granting by the
corporation of rights or options to purchase its equity shares of any class,
shall, if such proposed issuance or grant adversely affects the unlimited
dividend rights of such holders, have the right during a reasonable time and on
reasonable conditions to purchase such shares or other securities in proportions
as determined under the NYBCL. General Signal's Certificate of Incorporation
explicitly states that holders of its shares shall not have any preemptive
rights.
 
CORPORATE ACTION WITHOUT A STOCKHOLDERS' MEETING
 
     Under Delaware law, unless prohibited by the certificate of incorporation,
corporate actions may be authorized without a meeting by written consent of
holders of voting shares sufficient to approve the action at a meeting where all
holders of voting shares were present and voted. SPX's Certificate of
Incorporation prohibits stockholders from acting by written consent in lieu of a
meeting.
 
     Under New York law, whenever stockholders are required or permitted to take
any action by vote, such action may be taken without a stockholder meeting (i)
by written consent of all persons entitled to vote on the action, or (ii) if the
certificate of incorporation so provides, by the written consent of holders of
outstanding shares having not less than the minimum number of votes that would
be necessary to authorize such action at a meeting at which all shares entitled
to vote thereon were present and voted. General Signal's Certificate of
Incorporation is silent on the issue.
 
DIVIDENDS
 
     Under Delaware law, a corporation may, unless otherwise restricted by its
certificate of incorporation, declare and pay dividends out of surplus, or, if
no surplus exists, out of net profits for the current or preceding fiscal year,
provided that the amount of the capital following the declaration and payment of
the dividend is not less than the aggregate amount of capital represented by the
issued and outstanding stock of all classes having a preference upon the
distribution of the assets of the corporation.
 
     Under New York law, dividends may be declared and paid and other
distributions may be made out of surplus only, so that the net assets of the
corporation remaining after such declaration, payment or distribution must at
least equal the amount of its stated capital. Further, under New York law, a
corporation may not declare and pay dividends or make other distributions if the
corporation is insolvent or would otherwise be made insolvent, or when the
declaration, payment or distribution would be contrary to any restrictions
contained in the certificate of incorporation.

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<PAGE>   87
 
AMENDMENT OF CERTIFICATE OF INCORPORATION
 
     Under Delaware law, a corporation may amend its certificate of
incorporation if, among other things, such amendment is approved by a majority
of the outstanding stock entitled to vote; however, whenever the certificate of
incorporation shall require for action by the board of directors or by the
stockholders an affirmative vote greater than that normally provided for by
Delaware law, such provision of the certificate of incorporation may not be
amended or repealed without such greater vote. SPX's Certificate of
Incorporation provides that Articles Eighth (number, classification and power of
directors), Ninth (stockholder meetings), and Fifteenth (business combinations)
of the Certificate of Incorporation may only be altered or amended by the
affirmative vote of the holders of at least 80% of the voting power of all
shares of SPX; however, Article Fifteenth (business combinations) may be amended
or altered by a majority of the outstanding stock entitled to vote, if such
amendment or alteration has been approved by at least two-thirds of the
Continuing Directors (as defined in the Certificate of Incorporation). See "--
Business Combinations with Substantial Stockholders."
 
     Under New York law, with limited exceptions, for an amendment to the
certificate of incorporation to be adopted, the amendment must be authorized by
vote of the board of directors, and the stockholders must approve the amendment
by a majority of all outstanding shares entitled to vote on the amendment,
unless the certificate of incorporation requires a greater vote. Article 8 of
General Signal's Certificate of Incorporation provides that the adoption,
amendment or repeal of any provision of the Certificate of Incorporation
relating to (i) the number, classification and terms of office of directors,
(ii) the quorum of directors required for the transaction of business, (iii) the
filling of newly created directorships and vacancies occurring in the Board of
Directors, (iv) the removal of directors, (v) the power of the Board of
Directors to adopt, amend or repeal By-Laws of General Signal or the vote of the
Board of Directors required for such adoption, amendment or repeal, or (vi) any
amendment or repeal of Article 8 of the Certificate of Incorporation, requires
the affirmative vote of the holders of two-thirds of all outstanding shares
entitled to vote thereon.
 
AMENDMENT OF BY-LAWS
 
     Under Delaware law, the power to adopt, amend or repeal by-laws is vested
in the stockholders unless the certificate of incorporation confers the power to
adopt, amend or repeal by-laws upon the directors as well. SPX's Certificate of
Incorporation provides that, with limited exceptions, the SPX Board is expressly
authorized to adopt, amend and repeal the By-Laws. SPX's By-Laws provide that,
subject to the provisions of the Certificate of Incorporation, the By-Laws may
be altered by a majority vote of the shares represented and entitled to vote at
a meeting, or by the SPX Board through a majority vote of those directors
present at any meeting at which a quorum is present.
 
     Under New York law, the by-laws of a corporation may be amended or repealed
by a majority of the votes of the shares entitled to vote in the election of any
directors, or by the board of directors, when so provided in the certificate of
incorporation or a by-law adopted by the stockholders. General Signal's
Certificate of Incorporation provides that the adoption, amendment or repeal of
any By-Law relating to (i) the number, classification and terms of office of
directors, (ii) the quorum of directors required for the transaction of
business, (iii) the filling of newly created directorships and vacancies
occurring in the Board of Directors, (iv) the removal of directors, or (v) the
power of the Board of Directors to adopt, amend or repeal By-Laws of General
Signal or the vote of the Board of Directors required for such adoption,
amendment or repeal, requires the affirmative vote of the holders of two-thirds
of all outstanding shares entitled to vote thereon. General Signal's By-Laws
provide that, except as provided in the Certificate of Incorporation, any By-Law
may be deleted or amended in any respect, at an annual or special meeting, by a
majority of the votes cast by the holders of shares entitled to vote thereon, or
by a majority of the General Signal Board then in office.
 
STOCKHOLDER PROPOSAL PROCEDURES
 
     Under SPX's By-Laws, for a matter to be properly brought before an annual
meeting by a stockholder, the stockholder must have given timely notice thereof
in writing to the Secretary of SPX not less than 120 days nor more than 150 days
prior to the anniversary date of the immediately preceding annual meeting. A
 
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<PAGE>   88
 
stockholder's notice must state as to each matter the stockholder proposes to
bring before the annual meeting: (i) a brief description of the matter desired
to be brought, (ii) the name and address of the stockholder proposing such
action, (iii) the class and number of shares of SPX Common Stock which are
beneficially owned by the stockholder, and (iv) any material interest of the
stockholder in such matter.
 
     Under General Signal's By-Laws, for a matter to be properly brought before
a meeting by a stockholder, the stockholder must give timely notice thereof in
writing to the Secretary of General Signal not less than 45 days nor more than
60 days prior to such meeting; however, in the event less than 55 days prior
public disclosure of the date of such meeting is made to the stockholders or the
only public disclosure of the date of the meeting is written notice, notice must
be received not later than the close of business on the tenth day following the
day on which such notice of the date of the meeting was mailed or such public
disclosure was made. A stockholder's notice must state as to each matter the
stockholder proposes to bring before the annual meeting: (i) a brief description
of the business desired to be brought and the reasons for conducting such
business at the meeting, (ii) the name and address of the stockholder, (iii) the
class and number of shares of General Signal Common Stock which are owned
beneficially by the stockholder, and (iv) any material interest of the
stockholder in such business. Compliance with this procedure is determined by a
committee of the General Signal Board consisting of non-management directors,
unless the matter concerns the removal, replacement or election of directors, in
which case compliance is determined by inspectors appointed by the Secretary.
 
ADVANCE NOTICE OF STOCKHOLDER NOMINATIONS OF DIRECTORS
 
     Under SPX's By-Laws, nominations for the election of directors may be made
by the SPX Board or a committee appointed by the SPX Board or by any stockholder
entitled to vote in the elections of directors, generally. However, any
stockholder entitled to vote in the election of directors may nominate one or
more persons for election as directors at a meeting only if written notice of
such stockholder's intent to make such nomination has been given to the
Secretary of SPX not later than (i) with respect to an election to be held at an
annual meeting of stockholders, 120 days prior to the anniversary date of the
immediately preceding annual meeting, and (ii) with respect to an election to be
held at a special meeting of stockholders, the close of business on the tenth
day following the date on which notice of such meeting is first given to
stockholders. Each such notice must set forth: (i) the name and address of the
stockholder who intends to make the nomination and of the person to be
nominated, (ii) a representation that the stockholder is a holder of record of
stock entitled to vote at such meeting and intends to appear in person or by
proxy at the meeting to nominate the person or persons specified in the notice,
(iii) a description of all arrangements or understandings between the
stockholder and each nominee and any other person pursuant to which the
nomination is to be made by the stockholder, (iv) such other information
regarding each nominee as would be required to be included in a proxy statement
filed pursuant to the proxy rules of the Commission, and (v) the consent of each
nominee to serve as a director if elected.
 
     Under General Signal's By-Laws, nominations of persons for election to the
General Signal Board may be made at any meeting by or at the direction of the
General Signal Board or by any stockholder entitled to vote for the election of
directors at such meeting. Stockholders may nominate one or more persons for
election as directors at a meeting only if written notice of such stockholder's
intent to make such nomination has been given to the Secretary of General Signal
not less than 45 days nor more than 60 days prior to such meeting; however, in
the event less than 55 days prior public disclosure of the date of such meeting
is made to the stockholders or the only public disclosure of the date of the
meeting is written notice, notice must be received not later than the close of
business on the tenth day following the day on which such notice of the date of
the meeting was mailed or such public disclosure was made. Each such notice must
set forth: (i) the name, age, and business and residence addresses of the person
to be nominated, and the name and address of the stockholder making the
nomination, (ii) the class and number of shares of General Signal Common Stock
which are owned beneficially by the nominee and the stockholder making the
nomination, (iii) the principal occupation or employment of the nominee, and
(iv) such other information regarding each nominee or stockholder making the
nomination as would be required to be included in a proxy statement filed
pursuant to
 
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<PAGE>   89
 
the proxy rules of the Commission. Compliance with this procedure will be
determined by two inspectors appointed by the Secretary.
 
INDEMNIFICATION
 
     Under Delaware law, a corporation has the power to indemnify directors,
officers, employees and agents for actions taken in good faith and in a manner
they reasonably believed to be in or not opposed to the best interests of the
corporation, and, with respect to any criminal action or proceeding, had no
reasonable cause to believe the person's conduct was unlawful. Delaware law
provides that a corporation may advance expenses of defense (upon receipt of a
written undertaking from the person seeking the advance to reimburse the
corporation if indemnification is not appropriate) and must reimburse a
successful defendant for expenses, including attorneys' fees, actually and
reasonably incurred, and permits a corporation to purchase and maintain
liability insurance for its directors and officers. Under Delaware law, no
indemnification may be made for any claim, issue or matter as to which a person
has been adjudged by a court of competent jurisdiction, after exhaustion of all
appeals therefrom, to be liable to the corporation, unless and only to the
extent that a court determines that the person is entitled to indemnity for such
expenses as the court deems proper.
 
     SPX's Certificate of Incorporation provides that directors and officers of
SPX and those serving at the request of SPX as a director, officer, employee or
agent of another corporation or entity will be indemnified by SPX to the fullest
extent authorized by Delaware law. The indemnification right includes the right
to be paid by SPX the expenses incurred in defending any proceeding in advance
of its final disposition. SPX's Certificate of Incorporation provides that the
indemnification rights conferred by SPX's Certificate of Incorporation are not
exclusive of any other right to which persons seeking indemnification may be
entitled under any law, By-Law, agreement, vote of stockholders or disinterested
directors or otherwise. SPX is authorized by SPX's Certificate of Incorporation
to purchase and maintain insurance on behalf of its directors and officers.
 
     Under New York law, a corporation may indemnify its directors and officers
for actions taken in good faith and, in the case of conduct in his or her
official capacity, in a manner they reasonably believed to be in the best
interests of the corporation, and, with respect to any criminal action or
proceeding, had no reasonable cause to believe their conduct was unlawful. New
York law also provides that a corporation may advance reasonable expenses of
defense (upon receipt of a written undertaking from the person seeking the
advance to reimburse the corporation if indemnification is not appropriate). In
the case of a stockholder derivative suit, no indemnification may be made in
respect of (i) a threatened action, or a pending action which is settled or
otherwise disposed of, or (ii) any claim, issue or matter as to which such
person has been adjudged to be liable to the corporation, unless a court of
competent jurisdiction determines upon application that, in view of the
circumstances of the case, the person is fairly and reasonably entitled to
indemnify for such portion of the settlement amount and expenses as the court
deems proper. A person who has been successful in defense of a civil or criminal
action shall be entitled to indemnification. New York law permits a corporation
to purchase and maintain liability insurance for its directors and officers,
unless the officer or director personally gained a financial profit or advantage
to which he was not legally entitled, or a judgment adverse to the director or
officer establishes that his acts of active and deliberate dishonesty were
material to the cause of action.
 
     General Signal's By-Laws provide officers and directors a broad
indemnification right, similar in scope to that permitted under New York law.
The indemnification right includes the right to be paid by General Signal the
expenses incurred in defending any proceeding in advance of its final
disposition. The indemnification rights conferred by General Signal's By-Laws
are not exclusive of any other right to which persons seeking indemnification
may be entitled under any law, By-Law, Certificate of Incorporation or
otherwise. General Signal's By-Laws also prevent General Signal from taking any
corporate action or entering into any agreement which prohibits the rights of
officers and directors to indemnification. Further, the indemnification provided
by General Signal's By-Laws is deemed to be a contract between General Signal
and each party entitled to indemnification, continues after such party ceases to
be a director or officer and inures to the benefit of such party's heirs and
executors.
 
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<PAGE>   90
 
LIMITATION OF LIABILITY
 
     Delaware law allows a corporation to include in its certificate of
incorporation a provision limiting personal liability for a director to the
corporation or its stockholders for monetary damages for breach of fiduciary
duty as a director, provided that such provision does not eliminate or limit the
liability of a director (i) for any breach of the director's duty of loyalty to
the corporation or its stockholders, (ii) for acts or omissions not in good
faith or which involve intentional misconduct or a knowing violation of law,
(iii) under Section 174 of the DGCL concerning unlawful dividends and stock
repurchases and redemptions, or (iv) for any transaction from which the director
derived an improper personal benefit. Such provision does not eliminate or limit
the liability of a director for any act or omission occurring prior to the date
when such provision becomes effective.
 
     SPX's Certificate of Incorporation has such a provision. SPX's Certificate
of Incorporation also provides that any repeal or modification of this provision
by the SPX stockholders will not adversely affect any right or protection of a
director of SPX existing at the time of such repeal or modification.
 
     Under New York law, a corporation can include in its certificate of
incorporation a provision limiting personal liability for a director to the
corporation or its stockholders for monetary damages for breach of duty as a
director, provided that such provision does not eliminate or limit the liability
of a director (i) if a judgment or other final adjudication adverse to such
director establishes that such director's acts or omissions were in bad faith,
or involved intentional misconduct or a knowing violation of law, or that the
director personally gained in fact a financial profit or other advantage to
which such director was not legally entitled or that the director's acts
violated certain provisions of the NYBCL or (ii) for any act or omission prior
to the adoption of such a provision in the certificate of incorporation.
 
     General Signal's Certificate of Incorporation contains such a provision.
 
BUSINESS COMBINATIONS WITH SUBSTANTIAL STOCKHOLDERS
 
     SPX's Certificate of Incorporation requires the approval of a supermajority
of the SPX stockholders for certain business combinations with Substantial
Stockholders (as defined below).
 
     Notwithstanding any lesser percentage permitted by law, except as provided
below, 80% of the voting power of the SPX stockholders, voting together as a
single class, must approve any of the following Business Combinations:
 
   
          (a) Any merger of SPX or any of its subsidiaries with (i) any
     Substantial Stockholder or (ii) any other corporation which is, or after
     such merger or consolidation would be, an Affiliate or Associate (each term
     as defined in the Certificate of Incorporation) of a Substantial
     Stockholder; or
    
 
   
          (b) Any sale, lease, exchange, mortgage, pledge, transfer or other
     disposition to or with any Substantial Stockholder, its Affiliate or
     Associate, of (i) any assets of SPX or (ii) any of its subsidiaries, in
     each case having an aggregate Fair Market Value (as defined below) of
     $10,000,000 or more; or
    
 
          (c) The issuance or transfer by SPX or any of its subsidiaries of any
     securities of SPX or any of its subsidiaries to any Substantial
     Stockholder, or its Affiliate or Associate, in exchange for cash,
     securities or other consideration having an aggregate Fair Market Value of
     $10,000,000 or more; or
 
          (d) The adoption of any plan or proposal for the liquidation or
     dissolution of SPX proposed by or on behalf of any Substantial Stockholder,
     or its Affiliate or Associate; or
 
          (e) Any reclassification of securities (including any reverse stock
     split), or recapitalization of SPX, or any merger or consolidation of SPX
     with any of its subsidiaries, or any other transaction (whether or not with
     or into or otherwise involving a Substantial Stockholder) which has the
     effect, directly or indirectly, of increasing the proportionate share of
     the outstanding shares of any class of equity or convertible securities of
     SPX or any of its subsidiaries which is directly or indirectly owned by any
     Substantial Stockholder, or its Affiliate or Associate.
 
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<PAGE>   91
 
     The 80% requirement does not apply (i) to Business Combinations where the
SPX stockholders do not receive any cash or other consideration, solely in their
capacities as stockholders, and the Business Combination has been approved by
two-thirds of the Continuing Directors (as defined below) then in office, or
(ii) to all other Business Combinations which have been approved by two-thirds
of the Continuing Directors then in office and which satisfy all of the
following conditions:
 
          (a) The aggregate amount of cash and the Fair Market Value as of the
     date of the consummation of the Business Combination (the "Consummation
     Date") of the consideration other than cash to be received per share by
     holders of SPX Common Stock in such Business Combination is at least equal
     to the highest of the following:
 
             (A) the highest per share price (including any brokerage
        commissions, transfer taxes and soliciting dealers' fees) paid in order
        to acquire any shares of SPX Common Stock beneficially owned by the
        Substantial Stockholder which were acquired (1) within the two-year
        period immediately prior to the first public announcement of the
        proposal of the Business Combination (the "Announcement Date") or (2) in
        the transaction in which it became a Substantial Stockholder, whichever
        is higher, plus interest compounded annually from the date on which the
        Substantial Stockholder became a Substantial Stockholder through the
        Consummation Date at the prime rate of interest of Harris Trust and
        Savings Bank from time to time in effect in Chicago, less the aggregate
        amount of any cash dividends paid, and the Fair Market Value of any
        non-cash dividends paid, per share of SPX Common Stock from the date on
        which the Substantial Stockholder became a Substantial Stockholder
        through the Consummation Date in an amount up to but not exceeding the
        amount of such interest; or
 
             (B) the Fair Market Value per share of SPX Common Stock on the
        Announcement Date or on the date on which the Substantial Stockholder
        became a Substantial Stockholder, whichever is higher; or
 
             (C) the higher of the two numbers referred to in clause (B) above,
        multiplied by a fraction, the numerator of which is the highest per
        share price (including any brokerage commissions, transfer taxes and
        soliciting dealers' fees) paid in order to acquire any shares of SPX
        Common Stock beneficially owned by the Substantial Stockholder which
        were acquired within the two-year period immediately prior to the
        Announcement Date, and the denominator of which is the Fair Market Value
        per share of SPX Common Stock on the first day in such two-year period
        on which the Substantial Stockholder beneficially owned any shares of
        SPX Common Stock.
 
          (b) The consideration to be received by the SPX stockholders is to be
     in cash or in the same form as the Substantial Stockholder has previously
     paid for shares of the same stock. If multiple forms of consideration have
     been used by the Substantial Stockholder, then the form of consideration
     for the Business Combination will be cash or the form used to acquire the
     largest number of shares previously acquired by the Substantial
     Stockholder.
 
          (c) Except as approved by at least two-thirds of the Continuing
     Directors then in office, between the time that a Substantial Stockholder
     becomes such and the Business Combination is consummated, there shall have
     been (i) no failure to declare and pay periodic dividends with respect to
     any shares of preferred stock outstanding and (ii) no reduction in the
     annual rate of dividends paid on SPX Common Stock (with certain
     exceptions).
 
          (d) After becoming such, the Substantial Stockholder shall not have
     received any loans, advances, guarantees, pledges or other financial
     assistance or any tax credits or other tax advantages from SPX or any of
     its subsidiaries whether in anticipation of or in connection with such
     Business Combination or otherwise.
 
          (e) A proxy or information statement describing the proposed Business
     Combination and complying with the requirements of the Exchange Act shall
     have been mailed to public stockholders of SPX at least 30 days prior to
     the consummation of such Business Combination (whether or not such proxy or
     information statement is required to be mailed pursuant to the Exchange
     Act).
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<PAGE>   92
 
     "Continuing Director" is defined in SPX's Certificate of Incorporation as
any member of the SPX Board who is unaffiliated with and not a representative of
the Substantial Stockholder and was a member of the SPX Board prior to the time
that the Substantial Stockholder became a Substantial Stockholder, and any
successor of a Continuing Director who is unaffiliated with and not a
representative of the Substantial Stockholder and is recommended to succeed a
Continuing Director by at least two-thirds of the Continuing Directors then on
the SPX Board.
 
     "Fair Market Value" is defined in SPX's Certificate of Incorporation, in
the case of stock, as the highest closing sale price during the 30-day period
immediately preceding the date in question of a share of such stock on the
principal United States securities exchange on which such stock is listed, and,
in the case of property other than stock or stock for which no quotation is
available, the value of the property as determined in good faith by at least
two-thirds of the Continuing Directors.
 
     "Substantial Stockholder" is defined in SPX's Certificate of Incorporation
as any person (other than SPX or any of its subsidiaries) who or which:
 
          (i)   is the beneficial owner, directly or indirectly, of more than 
     ten percent of the voting power of the outstanding voting stock of SPX; or
 
          (ii)  is an Affiliate of SPX and at any time within the two-year 
     period immediately prior to the date in question was the beneficial        
     owner, directly or indirectly, of ten percent or more of the voting power
     of the then outstanding voting stock of SPX; or
 
          (iii) is an assignee of or has otherwise succeeded to any shares of
     the voting stock of SPX which were at any time within the two-year period
     immediately prior to the date in question beneficially owned by any
     Substantial Stockholder, if such assignment or succession shall have
     occurred in the course of a transaction or series of transactions not
     involving a public offering within the meaning of the Securities Act of
     1933.
 
     General Signal's Certificate of Incorporation does not have a comparable
provision.
 
BUSINESS COMBINATION STATUTES
 
     Under Delaware law, a corporation is prohibited from engaging in any
business combination with any Interested Stockholder (defined as the beneficial
owner of 15% or more of the voting power of a company) for a period of three
years following the date that such stockholder became an Interested Stockholder,
unless:
 
          (a) prior to such date, the board of directors of the corporation
     approved either the business combination or the transaction which resulted
     in the stockholder becoming an Interested Stockholder, or
 
          (b) upon consummation of the transaction which resulted in the
     stockholder becoming an Interested Stockholder, the Interested Stockholder
     owned at least 85% of the voting stock of the corporation, or
 
          (c) on or subsequent to such date, the business combination is
     approved by the board of directors and authorized at an annual or special
     meeting of stockholders, and not by written consent, by the affirmative
     vote of at least two-thirds of the outstanding voting stock which is not
     owned by the Interested Stockholder.
 
   
     Under Delaware law, a corporation has the option to opt-out of the above
business combination statute. Neither SPX's Certificate of Incorporation nor its
By-Laws exclude SPX from the restrictions imposed thereunder.
    
 
     Under New York law, a corporation may not engage in any business
combination with any Interested Stockholder (defined as the beneficial owner of
10% or more of the voting power of a corporation) for a period of five years
following the date that such stockholder became an Interested Stockholder (the
"Stock Acquisition Date"), unless, prior to the Stock Acquisition Date, the
board of directors of the corporation approved either the business combination
or the transaction which resulted in the stockholder becoming an Interested
Stockholder before the Stock Acquisition Date. Even after five years, such a
business combination
                                       81
<PAGE>   93
 
is permitted only if: (i) it is approved by a majority of the shares not owned
by, or by an affiliate of, the Interested Stockholder, or (ii) certain statutory
fair price requirements are met.
 
     Under New York law, a corporation has the option to opt-out of the above
business combination statute. Neither General Signal's Certificate of
Incorporation nor its By-Laws exclude it from the restrictions imposed
thereunder.
 
STOCKHOLDER RIGHTS PLANS
 
   
     SPX. SPX entered into a Rights Agreement with The Bank of New York, as
rights agent, on June 25, 1996, as amended October 22, 1997 (the "SPX Rights
Agreement"). Under the SPX Rights Agreement, the SPX Board declared a dividend
of one right (an "SPX Right") for each outstanding share of SPX Common Stock
held of record on June 25, 1996. Each SPX Right entitles its holder to purchase,
upon the occurrence of certain specified events, one one-thousandth of a share
of SPX Series A Junior Participating Preferred Stock, at an exercise price of
$200, subject to adjustment. At no time do the holders of SPX Rights have any
voting rights. The SPX Rights will no longer be exercisable after the earlier of
(i) June 25, 2006, (ii) the redemption of the SPX Rights, or (iii) the exchange
of the SPX Rights for SPX Common Stock. The description and terms of the SPX
Rights are set forth in the SPX Rights Agreement.
    
 
     In general, pursuant to the SPX Rights Agreement, upon the occurrence of
specified triggering events, such as the acquisition by any person (other than
SPX or any of its subsidiaries) of the beneficial ownership of securities
representing 20% or more of the outstanding SPX Common Stock without the prior
approval of the SPX Board, each holder of an SPX Right will have the right to
receive, upon exercise of the SPX Right, that amount of SPX Common Stock having
a market value equal to two times the exercise price of the SPX Right. The SPX
Rights Agreement further provides that if SPX is acquired in a merger or other
business combination or SPX sells more than 50% of its assets and such
transaction is not approved by the SPX Board, the SPX stockholders will have the
right to receive, with respect to each SPX Right, common stock of the acquiring
company having a value equal to two times the exercise price of the SPX Right.
Under certain circumstances, SPX may redeem the SPX Rights for a redemption
price of $.01 per SPX Right.
 
   
     General Signal. General Signal entered into a Rights Agreement with First
Chicago Trust Company of New York, N.A., as rights agent, on February 1, 1996
(as amended, the "General Signal Rights Agreement"). Under the General Signal
Rights Agreement, the General Signal Board declared a dividend of one right (a
"General Signal Right") for each outstanding share of General Signal Common
Stock held of record on March 21, 1996. Each General Signal Right entitles its
holder to purchase, upon the occurrence of certain specified events, one share
of General Signal Common Stock at an exercise price of $150, subject to
adjustment. The General Signal Rights will no longer be exercisable after the
earlier of (i) March 21, 2006, (ii) the redemption of the General Signal Rights,
or (iii) the exchange of the General Signal Rights for shares of General Signal
Common Stock. The description and terms of the General Signal Rights are set
forth in the General Signal Rights Agreement.
    
 
     In general, pursuant to the General Signal Rights Agreement, upon the
occurrence of specified triggering events, such as the acquisition by any person
(other than General Signal or any of its subsidiaries) of the beneficial
ownership of securities representing 20% or more of the outstanding General
Signal Common Stock without the prior approval of the General Signal Board, each
holder of a General Signal Right will have the right to receive, upon exercise
of the General Signal Right, that amount of General Signal Common Stock having a
market value equal to two times the exercise price of the General Signal Right.
The General Signal Rights Agreement further provides that if General Signal is
acquired in a merger or other business combination or General Signal sells more
than 50% of its assets and such transaction is not approved by the General
Signal Board, the General Signal stockholders will have the right to receive,
with respect to each General Signal Right, common stock of the acquiring company
having a market value equal to two times the exercise price of the General
Signal Right. Under certain circumstances, General Signal may redeem the General
Signal Rights for a redemption price of $.01 per General Signal Right.
 
     In connection with its approval of the Merger Agreement, the General Signal
Board amended the General Signal Rights Agreement with the result that neither
the entering into of the Merger Agreement by General
 
                                       82
<PAGE>   94
 
   
Signal, SPX and MergerSub nor the consummation of the transactions contemplated
thereby will cause the General Signal Rights to separate from the shares of
General Signal Common Stock, entitle or permit the holders of the General Signal
Rights to exercise the General Signal Rights or otherwise trigger any effect
under the General Signal Rights Agreement. See "The Merger -- Amendment of
General Signal Rights Agreement."
    
 
CONSIDERATION OF NON-STOCKHOLDER CONSTITUENCIES
 
     Under Delaware law, a board of directors may consider the impact of its
decisions on constituencies other than stockholders. Such constituencies may
include creditors, customers, employees, and perhaps the community generally.
However, the interests of other constituencies may be considered only if there
are rationally related benefits accruing to the stockholders or there is some
reasonable relationship to general stockholder interests.
 
   
     SPX's Certificate of Incorporation also provides that in determining
whether an acquisition proposal is in the best interests of SPX and its
stockholders, the SPX Board shall consider all factors it deems relevant,
including the consideration being offered in the proposal, not only in relation
to the then current market price, but also in relation to the then current value
of SPX in a freely negotiated transaction and in relation to the SPX Board's
estimate of the future value of SPX as an independent entity, and the social,
legal and economic effects upon employees, suppliers, customers and on the
communities in which SPX is located, as well as on the long term business
prospects of SPX.
    
 
     Under New York law, in taking action which may involve or relate to a
change in control of the corporation, a director of a corporation is entitled to
consider (i) the long-term as well as the short-term interests of the
corporation and its stockholders, and (ii) the effects that the corporation's
actions may have in the short-term or in the long-term upon (a) the prospects
for potential growth, development, productivity and profitability of the
corporation, (b) the corporation's current employees, (c) the corporation's
retired employees and other beneficiaries entitled to receive certain benefits
from the corporation, (d) the corporation's customers and creditors, and (e) the
ability of the corporation to provide, as a going concern, goods, services,
employment opportunities and employment benefits and otherwise to contribute to
the communities in which it does business.
 
                                       83
<PAGE>   95
 
                     MARKET PRICE AND DIVIDEND INFORMATION
 
     The SPX Common Stock is listed and principally traded on the NYSE (under
the symbol "SPW") and is also listed on the PE. The General Signal Common Stock
is listed and principally traded on the NYSE (under the symbol "GSX") and is
also listed on the PE. The following table sets forth the high and low trading
prices per share of each of the SPX Common Stock and General Signal Common Stock
on the NYSE for the periods indicated as reported on the NYSE Composite Tape,
and the dividends declared per common share for such periods by SPX and General
Signal:
 
   
<TABLE>
<CAPTION>
                                        SPX COMMON STOCK                GENERAL SIGNAL COMMON STOCK
                                 -------------------------------      --------------------------------
                                 HIGH      LOW      DIVIDENDS(A)      HIGH      LOW          DIVIDENDS
                                 ----      ---      ------------      ----      ---          ---------
<S>                              <C>       <C>      <C>               <C>       <C>          <C>
1995
  First Quarter................  $17 3/8   $14 1/4      $.10          $36 3/8   $31            $.24
  Second Quarter...............   15 1/8    10 3/4       .10           40        35 1/8         .24
  Third Quarter................   16        11 1/8       .10           42 1/2    28             .24
  Fourth Quarter...............   17        14 1/8       .10           33 7/8    28             .24
1996
  First Quarter................   18 1/8    13 5/8       .10           37 3/4    32             .24
  Second Quarter...............   27 1/8    18           .10           40 1/8    35 1/4         .24
  Third Quarter................   31 5/8    21 5/8       .10           44 1/4    36 1/4         .24
  Fourth Quarter...............   40 1/2    26 7/8       .10           44 1/2    39 3/4         .255
1997
  First Quarter................   49 3/4    37 3/8       .10           46 3/4    38 1/2         .255
  Second Quarter...............   70 5/8    41 7/8        --           46 3/4    36 1/8         .255
  Third Quarter................   65 3/4    49            --           53        37 3/16        .255
  Fourth Quarter...............   70 3/8    58 7/16       --           44 7/8    36 5/8         .27
1998
  First Quarter................   79 1/4    65 3/16       --           47 1/4    37 3/4         .27
  Second Quarter...............   77 15/16  63 5/8        --           46 15/16  35 13/16       .27
  Third Quarter (through
     September 2, 1998)........   66 3/4    48 5/16       --           42 13/16  35 9/16         --(b)
</TABLE>
    
 
- ---------------
   
(a) In April 1997, SPX eliminated its quarterly cash dividend and stated that
    future distributions to stockholders would be in the form of open market
    purchases of SPX Common Stock when deemed appropriate by management.
    
 
   
(b) General Signal has agreed in the Merger Agreement not to pay any further
    dividends prior to the Effective Time.
    
 
   
     On July 17, 1998, the last full trading day prior to the public
announcement by SPX and General Signal of the execution of the Merger Agreement,
the reported high and low sale prices per share and closing price per share of
SPX Common Stock and General Signal Common Stock on the NYSE Composite Tape and
per share of General Signal Common Stock on an equivalent share basis based on
the Merger Consideration of $18.00 in cash and 0.4186 of a share of SPX Common
Stock were as follows:
    
 
<TABLE>
<CAPTION>
                                                       PER SHARE                   PER EQUIVALENT SHARE
                                               --------------------------       --------------------------
                                               HIGH       LOW       CLOSE       HIGH       LOW       CLOSE
                                               ----       ---       -----       ----       ---       -----
<S>                                            <C>        <C>       <C>         <C>        <C>       <C>
SPX..........................................  $65 1/2    $64 7/16   $64 1/2    $--        $--        $--
General Signal...............................   38 3/8     36 1/4     37 5/8     45 7/16    45         45
</TABLE>
 
   
     On September 2, 1998, the last full trading day prior to the date of this
Joint Proxy Statement/ Prospectus, the reported closing price per share of SPX
Common Stock and General Signal Common Stock on the NYSE Composite Tape were
$48.4375 and $36.625, respectively. STOCKHOLDERS OF SPX AND GENERAL SIGNAL ARE
URGED TO OBTAIN CURRENT MARKET QUOTATIONS FOR SHARES OF SPX COMMON STOCK AND
GENERAL SIGNAL COMMON STOCK.
    
 
                                       84
<PAGE>   96
 
                    BENEFICIAL OWNERSHIP OF SPX COMMON STOCK
 
     The following table sets forth information (as of the respective dates
indicated) about the only known beneficial owners of more than 5% of the
outstanding shares of SPX Common Stock.
 
   
<TABLE>
<CAPTION>
                                                              NUMBER OF       PERCENT
            NAME AND ADDRESS OF BENEFICIAL OWNER               SHARES        OF CLASS*
            ------------------------------------              ---------      ---------
<S>                                                           <C>            <C>
FMR Corp. (Fidelity Investments)............................  1,666,800(1)     13.5%
  82 Devonshire Street Boston, MA 02109
Harris Associates L.P. .....................................  1,590,200(1)     12.9%
  Two North LaSalle Street, Suite 500
  Chicago, IL 60602
Fidelity Management Trust Company...........................  1,140,270(2)      9.2%
  82 Devonshire Street
  Boston, MA 02109
Merrill Lynch Asset Management..............................  1,035,650(1)      8.4%
  800 Sudders Mill Road
  Plainsboro, NJ 08536
</TABLE>
    
 
- ---------------
   
 *  Based upon the number of shares of SPX Common Stock outstanding as of August
    28, 1998.
    
(1) Form 13F filed with the Commission on March 31, 1998.
   
(2) Fidelity Management Trust Company, the Trustee of the SPX Corporation
    Retirement Savings and Stock Ownership Plan, owned, as of March 31, 1998,
    such number of shares pursuant to such plan and will vote such shares as
    instructed by participants. Shares for which no instructions have been
    received will be voted in the same proportion as the shares for which
    instructions have been received.
    
 
   
     The following table sets forth the amount and percentage of SPX Common
Stock beneficially owned as of July 31, 1998 by each director of SPX, by the
Chief Executive Officer and each of the four other most highly compensated
executive officers of SPX and by all directors and executive officers of SPX as
a group. Beneficial ownership has been determined in accordance with Rule 13d-3
under the Exchange Act, and does not necessarily bear on the economic incidents
of ownership or the right to transfer such shares.
    
 
   
<TABLE>
<CAPTION>
                                                              AMOUNT AND NATURE OF BENEFICIAL OWNERSHIP
                                                      ----------------------------------------------------------
                                                                           VESTED OPTIONS
                                                      SHARES OF COMMON   EXERCISABLE WITHIN             PERCENT
                 NAME OF INDIVIDUAL                     STOCK(1)(2)           60 DAYS          TOTAL    OF CLASS
                 ------------------                   ----------------   ------------------   -------   --------
<S>                                                   <C>                <C>                  <C>       <C>
John B. Blystone....................................      201,326(3)           71,890         273,216    2.2 %
J. Kermit Campbell..................................        1,617               7,900           9,517     *
Sarah R. Coffin.....................................        1,196               6,600           7,796     *
Frank A. Ehmann.....................................        2,658              12,200          14,858     *
Charles E. Johnson II...............................       66,145(4)            6,962          73,107     *
Christopher J. Kearney..............................        2,292                   0           2,292     *
Ronald L. Kerber....................................        3,804               4,409           8,213     *
Stephen A. Lison....................................       32,055              25,936          57,991     *
Peter H. Merlin.....................................        4,236              10,600          14,836     *
Patrick J. O'Leary..................................       17,167               5,000          22,167     *
Thomas J. Riordan...................................       11,910               2,868          14,778     *
David P. Williams...................................        3,527               7,273          10,800     *
All directors and executive officers as a group (15
  persons) including the above named................      358,625             175,852         534,477    4.3 %
</TABLE>
    
 
- ---------------
   
 *  Less than 1%.
    
   
(1) Included for Messrs. Blystone, Kearney, Lison, O'Leary and Riordan and all
    executive officers as a group are their respective allocated shares held in
    the SPX Corporation Retirement Savings and Stock Ownership Plan.
    
(2) Except as otherwise indicated, each director and executive officer has sole
    voting and investment power over the shares he or she beneficially owns.
   
(3) Includes 75,000 shares of restricted stock granted to Mr. Blystone as part
    of his initial employment contract with SPX that have not yet vested. These
    shares vest ratably based on continued employment to the vesting date at the
    rate of 25,000 shares per year beginning December 1, 1998. Mr. Blystone will
    receive all dividends on, and has the right to vote, these shares. Does not
    include 250 shares held by The Blystone Foundation of which Mr. Blystone and
    his wife along with Mr. Kearney and James M. Sheridan are directors and as
    to which Mr. Blystone disclaims any beneficial interest.
    
(4) Includes 20,548 shares owned by Mr. Johnson's wife.
 
                                       85
<PAGE>   97
 
              BENEFICIAL OWNERSHIP OF GENERAL SIGNAL COMMON STOCK
 
     The following table reflects the holdings of the only persons known to
General Signal to own beneficially 5% or more of General Signal Common Stock.
 
   
<TABLE>
<CAPTION>
                                                                                   PERCENT
NAME AND ADDRESS OF BENEFICIAL OWNER                          NUMBER OF SHARES    OF CLASS*
- ------------------------------------                          ----------------    ----------
<S>                                                           <C>                 <C>
College Retirement Equities Fund............................    3,292,400(1)       7.5  %
  730 Third Avenue
  New York, NY 10017
Harris Associates, Inc......................................    2,805,900(2)       6.4  %
  Two North LaSalle Street, Suite 500
  Chicago, IL 60602
Iridian Asset Management LLC; David L. Cohen; and Harold J.
  Levy......................................................    2,699,900(3)       6.2  %
  c/o Iridian Asset Management LLC
  276 Post Road West
  Westport, CT 06880
Putnam Investments, Inc.....................................    2,454,873(4)       5.6  %
  One Post Office Square
  Boston, MA 02109
General Signal Corporation Savings and Stock Ownership Plan
  (the "Savings Plan") the trustee of which is The Chase
  Manhattan Bank............................................    2,408,918(5)       5.5  %
  Chase MetroTech Center
  Brooklyn, NY 11245
</TABLE>
    
 
- ---------------
   
 *  Based upon the number of shares of General Signal Common Stock outstanding
    as of August 28, 1998.
    
 
   
(1) A Schedule 13G filing disclosed that the Board of Trustees of College
    Retirement Equities Fund ("CREF"), an investment company, has sole voting
    power with respect to such shares and shared dispositive power with respect
    to such shares with TIAA-CREF Investment Management, LLC, CREF's registered
    investment adviser.
    
 
(2) A Schedule 13G filing by Harris Associates, Inc., the general partner of
    Harris Associate L.P., a registered investment adviser, disclosed that
    Harris Associates L.P. has shared voting power with respect to all such
    shares with investment clients for whom it serves as an investment adviser.
    The filing further disclosed that Harris Associates L.P. has sole
    dispositive power with respect to 2,047,900 such shares and shared
    dispositive power with respect to 758,000 such shares.
 
(3) A Schedule 13G filing disclosed that Iridian Asset Management LLC
    ("Iridian"), a registered investment adviser, has sole voting and
    dispositive power with respect to 2,553,100 of such shares; LC Capital
    Management, LLC ("LC Capital") is a member owning 69.6% of Iridian and may
    therefore be deemed to have beneficial ownership of the shares held by
    Iridian and indirect sole voting and dispositive power with respect thereto;
    CL Investors, Inc. ("CL Investors") is a member owning 96% of LC Capital and
    may therefore be deemed to have beneficial ownership of the shares held by
    Iridian and indirect sole voting and dispositive power with respect thereto;
    each of David L. Cohen and Harold J. Levy owns 50% of CL Investors, and each
    may therefore be deemed to have beneficial ownership of the shares held by
    Iridian and indirect shared voting and dispositive power with respect
    thereto; and each of Messrs. Cohen and Levy is employed by Arnhold & S.
    Bleichroeder Advisers, Inc., which serves as an adviser to First Eagle Fund
    of America, Inc., a mutual fund holding, according to such filing, 146,800
    of such shares, as to which shares each of Messrs. Cohen and Levy disclaims
    deemed beneficial ownership and as to which shares none of Iridian, LC
    Capital nor CL Investors has voting or dispositive power.
 
(4) A Schedule 13G filing disclosed that Putnam Investments, Inc. ("Putnam
    Investments"), a wholly owned subsidiary of Marsh & McLennan Companies,
    Inc., has shared dispositive power with respect to all such shares and
    shared voting power with respect to 14,400 such shares; the Putnam Advisory
    Company, Inc. ("Putnam Advisory"), a registered investment adviser and
    wholly owned subsidiary of Putnam Investments, has shared voting power with
    respect to 14,400 such shares and shared dispositive power with respect to
    799,200 such shares; Putnam Investment Management, Inc. ("Putnam
    Management"), a registered investment adviser and wholly owned subsidiary of
    Putnam Investments, has shared dispositive power with respect to 1,655,673
    such shares; and that Putnam Advisory is the investment adviser to the
    Putnam family of mutual funds and Putnam Management is the investment
    adviser to institutional clients of Putnam Investments.
 
(5) The Chase Manhattan Bank, as trustee of the Savings Plan, will vote the
    shares as instructed by participants, and shares for which no instructions
    have been received will be voted by the trustee in the same proportion as
    the shares for which instructions have been received.
 
                                       86
<PAGE>   98
 
   
     The following table sets forth the amount and percentage of General Signal
Common Stock beneficially owned as of August 28, 1998 by each director of
General Signal, by the Chief Executive Officer and each of the four other most
highly compensated executive officers of General Signal and by all directors and
executive officers of General Signal as a group. Beneficial ownership has been
determined in accordance with Rule 13d-3 under the Exchange Act, and does not
necessarily bear on the economic incidents of ownership or the right to transfer
such shares.
    
 
   
<TABLE>
<CAPTION>
                                                        AMOUNT AND NATURE OF
                                                        BENEFICIAL OWNERSHIP
                                                            OF SHARES OF        PERCENT      STOCK
                  NAME OF INDIVIDUAL                      CAPITAL STOCK(1)      OF CLASS    UNITS(2)
                  ------------------                    --------------------    --------    --------
<S>                                                     <C>                     <C>         <C>
Joanne L. Bober.......................................         12,172(3)            *           449
H. Kent Bowen.........................................          4,000               *         2,615
Van C. Campbell.......................................          8,017(4)            *         3,218
Michael A. Carpenter..................................          6,000               *            --
Elizabeth D. Conklyn..................................         18,277(3)            *         2,844
Ursula F. Fairbairn...................................          4,532               *         3,582
Ronald E. Ferguson....................................          6,686               *        12,579
Emerson U. Fullwood...................................             --               *            --
Robert D. Kennedy.....................................          5,000               *           100
Michael D. Lockhart...................................        364,323(3)            *        18,928
John R. Selby.........................................         10,254(4)            *         6,062
Ernest R. Verebelyi...................................         13,330(3)            *           887
Richard F. Zannino....................................          8,211(3)            *            --
All directors and executive officers as a group (18
  persons)............................................        569,157(3)          1.3%       60,558
</TABLE>
    
 
- ---------------
 *  Less than 1%.
 
   
(1) The figures shown include the interest of executive officers of General
    Signal in an aggregate of 23,459 shares of General Signal Common Stock held
    by the trustee under the Savings Plan as June 30, 1998 and include the
    following shares of General Signal Common Stock which the persons listed
    have the right to acquire as of July 31, 1998 or within 60 days after such
    date through the exercise of General Signal Options: Michael D. Lockhart
    (273,000); Ernest R. Verebelyi (8,250); Joanne L. Bober (7,000); Elizabeth
    D. Conklyn (12,500); H. Kent Bowen, Van C. Campbell, Ursula F. Fairbairn,
    Ronald E. Ferguson, Robert D. Kennedy and John R. Selby (4,000 each) and all
    current directors and executive officers as a group (372,776).
    
 
   
(2) For the executive officers, the "stock units" represent compensation
    deferred and credited as "phantom stock units" held under General Signal's
    Deferred Compensation Plan as of June 30, 1998. For H. Kent Bowen, Van C.
    Campbell, Ursula F. Fairbairn, Ronald E. Ferguson, Robert D. Kennedy and
    John R. Selby, the "stock units" represent either (a) director fees deferred
    to their share-denominated accounts or (b) accrued retirement benefits
    transferred from a terminated retirement plan for non-employee directors to
    the General Signal's Deferred Compensation Plan for Directors. Under both
    plans, the value of the "stock units" at the time of distribution will be
    the then market value of the General Signal Common Stock, but the deferred
    amounts will be paid in cash.
    
 
(3) Includes Restricted Shares held by: Michael D. Lockhart (91,000); Richard F.
    Zannino (8,000); Ernest R. Verebelyi (3,334); Joanne L. Bober (5,000);
    Elizabeth D. Conklyn (5,000); and five other executive officers (13,000)
    with respect to which the holders have sole voting power, but no dispositive
    power, during the restricted period.
 
   
(4) Van C. Campbell and John R. Selby elected to defer all or part of their cash
    compensation as directors for 1996 or prior thereto and to receive in lieu
    thereof Restricted Shares. The figures shown include the Restricted Shares
    with respect to which the holders have sole voting power, but no dispositive
    power, during the restricted period as follows: Mr. Campbell (3,217); and
    Mr. Selby (5,654).
    
 
                                       87
<PAGE>   99
 
             SELECTED HISTORICAL CONSOLIDATED FINANCIAL DATA OF SPX
                                  (unaudited)
                      (in millions, except per share data)
 
     The following table sets forth selected historical consolidated financial
data for SPX for each of the five years in the period ended December 31, 1997
and for the six-month periods ended June 30, 1998 and 1997. Such data have been
derived from, and should be read in conjunction with, the audited consolidated
annual financial statements and other financial information contained in SPX's
1997 Form 10-K and the unaudited consolidated interim financial information
contained in SPX's Second Quarter Form 10-Q, including the notes thereto,
incorporated by reference herein. The operating results for the six months ended
June 30, 1998 are not necessarily indicative of the results that may be expected
for the year ended December 31, 1998. The selected historical financial data are
qualified in their entirety by reference to the historical financial statements
(and related notes) which are incorporated by reference herein. See "Available
Information" and "Incorporation of Documents by Reference."
 
<TABLE>
<CAPTION>
                                      AS OF AND FOR THE
                                      SIX MONTHS ENDED
                                          JUNE 30,                     AS OF AND FOR THE YEAR ENDED DECEMBER 31,
                                     -------------------     -------------------------------------------------------------
                                     1998(a)     1997(b)     1997(b)     1996(c)        1995       1994(d)      1993(e, f)
                                     -------     -------     -------     --------     --------     --------     ----------
<S>                                  <C>         <C>         <C>         <C>          <C>          <C>          <C>
STATEMENT OF INCOME DATA:
Revenues...........................  $ 462.0     $ 466.9     $ 922.3     $1,109.4     $1,098.1     $1,079.9      $  747.2
Cost of products sold..............    332.7       340.2       669.0        850.1        853.5        821.5         508.0
Selling, general and
  administrative...................     83.4        87.2       175.3        186.5        194.5        198.0         204.1
Other operating expenses, net(g)...      1.7         1.9         3.9          1.9          8.3          2.9          53.4(d)
Special charges and (gains)(h).....     (7.1)(i)     6.5(j)    116.5(j)      87.9(k)      10.7(k)        --          27.5(l)
                                     -------     -------     -------     --------     --------     --------      --------
Operating income (loss)............     51.3        31.1       (42.4)       (17.0)        31.1         57.5         (45.8)
Other expense (income), net........     (1.4)      (72.7)(b)   (74.2)(b)     (0.7)        (3.0)         0.1        (102.9)(f)
Interest expense, net..............      7.9         7.3        13.9         31.8         35.7         35.2          15.9
                                     -------     -------     -------     --------     --------     --------      --------
Income (loss) before income
  taxes............................     44.8        96.5        17.9        (48.1)        (1.6)        22.2          41.2
Income taxes.......................     16.1        49.8        21.3          7.6         (0.2)         9.1          28.1
                                     -------     -------     -------     --------     --------     --------      --------
Income (loss) from continuing
  operations.......................     28.7        46.7        (3.4)       (55.7)        (1.4)        13.1          13.1
Discontinued operation(m)..........       --          --          --           --         (2.8)         1.0           2.1
Cumulative effect of accounting
  changes(n).......................       --          --          --           --           --           --         (31.8)
Extraordinary items(o).............       --       (10.3)      (10.3)        (6.6)        (1.1)          --         (24.0)
                                     -------     -------     -------     --------     --------     --------      --------
Net income (loss)..................  $  28.7     $  36.4     $ (13.7)    $  (62.3)    $   (5.3)    $   14.1      $  (40.6)
                                     =======     =======     =======     ========     ========     ========      ========
Income (loss) per share from
  continuing operations:
    Basic..........................  $  2.40     $  3.44     $ (0.27)    $  (4.04)    $  (0.10)    $   1.02      $   1.04
    Diluted........................     2.33        3.33       (0.27)       (4.04)       (0.10)        1.02          1.04
Weighted average number of common
  shares outstanding:
    Basic..........................   11.972(p)   13.571(p)   12.754(p)    13.785       13.173       12.805        12.604
    Diluted........................   12.342(p)   14.040(p)   12.754(p)    13.785       13.173       12.805        12.604
Dividends per share................  $    --(p)  $  0.10(p)  $  0.10(p)  $   0.40     $   0.40     $   0.40      $   0.40
OTHER FINANCIAL DATA:
Total assets.......................  $ 642.9     $ 551.5     $ 583.8     $  616.0     $  831.4     $  929.0      $1,024.4
Total debt.........................    262.0       197.4       205.3        229.3        319.8        415.2         430.2
Stockholders' equity (deficit).....    (38.4)       24.4       (43.4)       105.9        162.2        158.7         145.4
Capital expenditures...............     14.6        10.6        22.6         20.2         31.0         48.5          15.1
Depreciation and amortization......     12.0        13.3        25.0         40.8         43.5         38.5          24.4
</TABLE>
 
Note: The accompanying notes are an integral part of the selected historical
      consolidated financial data.
 
                                       88
<PAGE>   100
 
        NOTES TO SELECTED HISTORICAL CONSOLIDATED FINANCIAL DATA OF SPX
                                  (unaudited)
                      (in millions, except per share data)
 
(a)  Late in the second quarter of 1998, SPX acquired 89% of Tecnotest S.r.l.,
     an Italian company, and 100% of The Valley Forge Group for a combined
     purchase price of $59.0 in cash and assumed debt. Annual revenues of these
     unrelated businesses are approximately $55.0. Had these acquisitions taken
     place on January 1, 1997, consolidated revenues and income would not have
     been significantly different from reported 1997 results.
 
   
(b)  During 1997, SPX sold its Sealed Power division for $223.0 in gross cash
     proceeds. SPX recorded a pretax gain of $71.9, or $31.2 after-tax. Annual
     1996 revenues of this division were approximately $230.0. See "Pro Forma
     Adjusted Historical Financial Data of SPX."
    
 
(c)  During 1996, SPX sold its Hy-Lift division for approximately $15.0. Annual
     1995 revenues of this division were approximately $45.0.
 
(d)  Effective December 31, 1993, SPX acquired the balance of SPT for $39.0. SPX
     previously owned 49% of SPT and accounted for its investment using the
     equity method. SPT's 1993 revenues were $392.0. As a result of this
     acquisition, SPX was required to recognize its share of SPT's losses,
     $26.9, in 1993. Also in 1993, SPX initiated consolidation of Sealed Power
     Europe Limited Partnership which required recognition of cumulative losses
     of the partnership since its inception, resulting in a charge of $21.5.
     These charges have been included in other operating expenses, net.
 
(e)  During 1993, SPX acquired Allen Testproducts and its related leasing
     company for $102.0. Annual 1992 revenues of the businesses acquired were
     approximately $83.0.
 
   
(f)  During 1993, SPX divested its Sealed Power Replacement and Truth divisions
     for a gain of $105.4, or $64.2 after-tax. Annual 1992 revenues of these
     divisions were approximately $247.0.
    
 
   
(g)  Other operating expenses, net include goodwill/intangible amortization,
     minority interest, and earnings from equity interests.
    
 
(h)  Special charges and gains include certain legal costs, restructuring
     charges, write-off of goodwill, and liquidation of certain investments.
 
   
(i)  The first six months of 1998 included a $13.7 realized gain on SPX's
     investment in Echlin Inc., which was liquidated during the second quarter,
     and $6.6 of expenses associated with SPX's offer to acquire Echlin Inc.
    
 
   
(j)  These charges included a $99.0 restructuring charge, a $4.1 charge for five
     corporate executive staff reductions, and $13.4 of costs associated with
     various legal matters, including $6.5 of anticipated future legal costs
     associated with the ongoing litigation with Snap-on Incorporated, legal
     costs associated with a settled case in California, and certain other
     matters.
    
 
   
     SPX recorded the $99.0 restructuring charge to combine two divisions within
     the Service Solutions segment and to recognize reduced carrying value of
     certain assets resulting from the decision to combine the divisions and
     exit certain manufactured diagnostic equipment product lines. The
     restructuring of the two Service Solutions businesses was in response to
     changing market dynamics and changing needs of customers. SPX decided to
     combine its OE Tool and Equipment business with its Aftermarket Tool and
     Equipment business to provide a single business focused on the combined
     market and customer needs. Additionally, SPX decided to exit certain
     products to focus upon new generation products that would better meet
     customer needs. The decision resulted in a reduction of workforce and
     closing of certain facilities. The components of the charge were computed
     based on management's estimate of the realizable value of the affected
     tangible and intangible assets and estimated exit costs including severance
     and other employee benefits based on existing severance policies and local
     laws.
    
 
     The $99.0 charge included $63.7 of restructuring costs, $25.8 of reduced
     inventory value and $9.5 of reduced value of other tangible and intangible
     assets related to exiting certain product lines. The $63.7

                                       89
<PAGE>   101
  NOTES TO SELECTED HISTORICAL CONSOLIDATED FINANCIAL DATA OF SPX (CONTINUED)
                                  (unaudited)
                      (in millions, except per share data)
 
     of restructuring costs included $13.7 of severance related costs for
     approximately 800 people, $20.3 for incremental repossession and
     distribution exit costs (including the termination of lease financing and
     distributor agreements), $21.2 for incremental service and software update
     obligations resulting from SPX's decision to maintain adequate service
     capabilities and appropriate software updates of the exited products for
     customers who have previously purchased the exited products, and $8.5 of
     costs associated with idled facilities. The implementation of this
     restructuring is expected to be substantially complete by the end of 1998.
 
     Of the total special charges of $116.5, the components of the charge that
     will require the future payment of cash are $80.9. Cash payments through
     June 1998 related to the special charges were $16.5. The expected future
     cash payments include an estimated $34.0 over the balance of 1998 with the
     remainder, principally repossession costs and service and software update
     obligations, over the following two years. As there is some uncertainty
     associated with the timing of the cash payments, the remaining accrual at
     June 30, 1998 of $64.2 has been classified in other current accrued
     liabilities. Management estimates that savings from the restructuring will
     increase operating income by $3.0 in 1998 and $10.0 in 1999. The savings
     result primarily from the reduction in headcount and facilities.
 
(k)  During the fourth quarter of 1995, management authorized and committed SPX
     to undertake two significant restructuring plans. The first plan
     consolidated five Service Solutions divisions into two divisions. The
     second plan closed Sealed Power division's German foundry operation and
     transferred certain piston ring operations to other facilities. In 1996,
     three additional restructuring actions were initiated including an early
     retirement program at the Service Solutions divisions, a cost reduction
     initiative at several Service Solutions international locations, and an
     early retirement program at the Sealed Power division. A summary of these
     restructurings follows:
 
   
<TABLE>
<CAPTION>
                                                              1996     1995
                                                              ----     ----
<S>                                                           <C>      <C>
Service Solutions -- Five divisions consolidated into two
  divisions.................................................  $11.2    $ 7.0
Service Solutions -- Early retirement.......................    1.1       --
Service Solutions -- International..........................    3.5       --
SPD -- Closing foundry at SP Europe.........................     --      3.7
SPD -- Early retirement.....................................    4.2       --
                                                              -----    -----
          Total.............................................  $20.0    $10.7
                                                              =====    =====
</TABLE>
    
 
   
     Service Solutions -- Restructuring.  In order to improve customer service,
     reduce costs and improve productivity and asset utilization, SPX decided to
     consolidate five existing Service Solutions divisions into two. This
     restructuring plan involved closing two SPX owned manufacturing facilities,
     an SPX owned distribution facility, several leased service centers and a
     leased sales facility in France. The plan also included combining sales,
     engineering and administrative functions, and was completed at the end of
     1996. The plan included the termination of approximately 570 employees
     resulting in a net reduction of approximately 310 employee positions after
     considering staffing requirements at remaining facilities.
    
 
     SPX recorded a $7.0 charge in 1995 and an $11.2 charge in 1996 to complete
     this restructuring. These charges recognized severance and benefits for
     employees to be terminated, holding costs of vacated facilities, the
     adjustment to fair market value of one manufacturing facility to be closed,
     and other costs to complete the consolidation of the divisions. The
     distribution facility was sold during the fourth quarter of 1996 and the
     manufacturing facilities were sold during 1997.
 
   
     Service Solutions -- Early Retirement.  Closely associated with the
     consolidation of five divisions into two, an early retirement program was
     accepted by approximately 60 people and SPX recorded a $1.1 charge in the
     first quarter of 1996.
    
 
                                       90
<PAGE>   102
  NOTES TO SELECTED HISTORICAL CONSOLIDATED FINANCIAL DATA OF SPX (CONTINUED)
                                  (unaudited)
                      (in millions, except per share data)
 
   
     Service Solutions -- International.  During the second quarter of 1996, SPX
     recorded a $3.5 restructuring charge principally to recognize severance
     associated with the termination of 113 international employees and related
     operating downsizing costs.
    
 
   
     SPD -- Closing Foundry at SP Europe.  SPX closed its unprofitable foundry
     operations at SP Europe and transferred certain piston ring operations to
     other facilities. This closing resulted in the elimination of approximately
     200 positions and was completed at the end of the third quarter of 1996. In
     1995, SPX recorded a $3.7 restructuring charge to accrue severance that was
     paid to these employees.
    
 
   
     SPD -- Early Retirement.  During the second quarter of 1996, SPX recorded a
     $4.2 restructuring charge for the early retirement of 94 employees at the
     Sealed Power division.
    
 
     The cost savings associated with the 1995 and 1996 restructuring actions,
     described above, relate primarily to the Service Solutions restructuring
     actions. The actual savings achieved in 1996 and 1997 have been consistent
     with the estimated full year savings of $23.0 by the year 1998. These
     actions increased operating income by an estimated $7.0 in 1996 and an
     estimated $12.0 in 1997.
 
     These charges were recorded in the appropriate periods in accordance with
     the requirements of Emerging Issues Task Force Pronouncement 94-3. Certain
     costs incurred in connection with management's planned actions not
     qualifying for accrual in 1995 were recorded in 1996, based on employee
     acceptance of voluntary termination benefits and the satisfaction of other
     requirements to recognize these costs. At December 31, 1997, the
     restructuring actions initiated in 1995 and 1996 were complete and the
     actual costs to implement the actions did not differ materially from the
     estimates used to record these accruals.
 
   
     Also during 1996, SPX recognized a $67.8 goodwill write-off, with no
     related tax benefit. The goodwill was related to the 1988 acquisition of
     Bear Automotive Company and the 1993 acquisition of Allen Testproducts,
     collectively referred to as Automotive Diagnostics. This goodwill
     represented SPX's intangible business investment in PC-based engine
     diagnostic equipment, wheel service equipment and gas emissions testing
     equipment. At December 31, 1995, management's analysis of this business
     projected that the cost savings, market synergies and other factors which,
     in part, would be realized from the Bear Automotive Company and Allen
     Testproducts combination in 1995 and various subsequent restructuring
     actions would result in non-discounted operating income sufficient to
     exceed goodwill amortization. The decision to write off the goodwill
     resulted from conclusions drawn from SPX's strategic review process that
     was completed in December 1996. The strategic review found accelerating
     technological changes had significantly reduced the remaining life of
     PC-based diagnostic equipment. The process also found significant
     uncertainties about the future opportunities related to gas emissions
     testing equipment, and a decline in SPX's wheel service equipment market
     share. Management's analysis of this business at December 31, 1996
     projected significant differences in business conditions from its December
     31, 1995 analysis, including declining revenues and margins of diagnostic
     and wheel service equipment and reduced revenues related to the emissions
     testing equipment due to the uncertainties about the future status of the
     state emissions programs. This analysis indicated that the businesses, as
     originally acquired, would not be able to generate operating income
     sufficient to offset the goodwill amortization. Assessing the impact of
     these factors on the businesses, as originally acquired, management
     concluded that Automotive Diagnostics' goodwill was impaired.
    
 
   
(l)  During 1993, SPX recognized a special charge to combine its Bear Automotive
     Company operation with Allen Testproducts of $27.5, or $18.5 after-tax.
    
 
   
(m)  During 1995, SPX sold SPX Credit Corporation and recorded a pretax loss of
     $4.8, or $3.0 after-tax. The financial results of this operation are
     included as a discontinued operation through the date of divestiture.
    
 
                                       91
<PAGE>   103
  NOTES TO SELECTED HISTORICAL CONSOLIDATED FINANCIAL DATA OF SPX (CONTINUED)
                                  (unaudited)
                      (in millions, except per share data)
 
(n)  During 1993, SPX adopted a new accounting methodology for its ESOP and
     reflected its 49% share of SPT's adoption of SFAS No. 106 regarding
     accounting for postretirement benefits other than pensions.
 
   
(o)  During 1997, SPX repurchased substantially all ($126.7) of its outstanding
     11 3/4% senior subordinated notes through a tender offer. SPX recorded an
     extraordinary item, net of taxes, of $10.3 for the costs to purchase the
     notes. During 1996, SPX purchased $99.9 of these notes and recorded an
     extraordinary item, net of taxes, of $6.6 for the costs to purchase the
     notes. During 1995, SPX purchased $31.7 of these notes and recorded an
     extraordinary item, net of taxes, of $1.1 for the costs to purchase the
     notes. During 1993, SPX recorded the costs associated with prepayment of
     certain SPX and SPT indebtedness totaling $24.0, net of taxes, as an
     extraordinary item.
    
 
(p)  During 1997, SPX purchased 2.147 shares of SPX Common Stock through a Dutch
     Auction self-tender offer for $56.00 per share. As of December 31, 1997,
     SPX had purchased an additional 0.390 shares through open market purchases.
     During the first six months of 1998, SPX purchased an additional 0.398
     shares through open market purchases. Also, concurrent with the Dutch
     Auction, SPX announced the elimination of quarterly cash dividends and
     stated that future distributions to stockholders would be in the form of
     open market purchases of SPX Common Stock, when deemed appropriate by
     management.
 
                                       92
<PAGE>   104
 
       SELECTED HISTORICAL CONSOLIDATED FINANCIAL DATA OF GENERAL SIGNAL
                                  (unaudited)
                      (in millions, except per share data)
 
     The following table sets forth selected historical consolidated financial
data for General Signal for each of the five years in the period ended December
31, 1997 and for the six-month periods ended June 30, 1998 and 1997. Such data
have been derived from, and should be read in conjunction with, the audited
consolidated annual financial statements and other financial information
contained in General Signal's 1997 Form 10-K and the unaudited consolidated
interim financial information contained in General Signal's Second Quarter Form
10-Q, including the notes thereto, incorporated by reference herein. The
operating results for the six months ended June 30, 1998 are not necessarily
indicative of the results that may be expected for the year ended December 31,
1998. The selected historical financial data are qualified in their entirety by
reference to the historical financial statements (and related notes) which are
incorporated by reference herein. See "Available Information" and "Incorporation
of Documents by Reference."
 
<TABLE>
<CAPTION>
                                     AS OF AND FOR THE
                                     SIX MONTHS ENDED
                                         JUNE 30,                    AS OF AND FOR THE YEAR ENDED DECEMBER 31,
                                   ---------------------   --------------------------------------------------------------
                                     1998     1997(b)(c)   1997(b)(c)    1996(d)      1995(e)      1994(f)      1993(g)
                                   --------   ----------   ----------   ----------   ----------   ----------   ----------
<S>                                <C>        <C>          <C>          <C>          <C>          <C>          <C>
STATEMENT OF INCOME DATA:
Net sales........................  $  776.1    $1,045.2     $1,954.6     $2,065.0(k)  $1,863.2     $1,527.7     $1,354.2
Cost of sales (a)................     505.7       699.2      1,313.6(i)   1,369.7(k)   1,246.9      1,064.8(m)     902.6
Selling, general and
  administrative(a)..............     186.6       232.5        444.9(i)     455.6(k)     403.0        331.2(m)     307.3
Other operating expenses,
  net(a).........................       7.3         7.6         14.6         16.6         12.5          5.8          8.4
Special charges and (gains)(a)...        --          --           --           --         20.1(l)        --        (19.8)(o)
                                   --------    --------     --------     --------     --------     --------     --------
Operating income.................      76.5       105.9        181.5        223.1        180.7        125.9        155.7
Other expense (income) (a).......        --          --        (72.7)(b)    (20.8)(d)       --      (46.2)(n)         --
Equity in earnings of EGS (c)....     (20.0)         --        (11.8)          --           --           --           --
Interest expense, net............       8.6         8.0         13.2         21.5         24.3         11.8         16.6
                                   --------    --------     --------     --------     --------     --------     --------
Income from continuing operations
  before income taxes............      87.9        97.9        252.8        222.4        156.4        160.3        139.1
Income taxes.....................      33.8        39.2        121.8         89.0         56.3         56.2(m)      41.0
                                   --------    --------     --------     --------     --------     --------     --------
Income from continuing
  operations.....................      54.1        58.7        131.0        133.4        100.1        104.1         98.1
Discontinued operations (f)......        --          --          2.3           --        (64.0)       (23.4)       (31.5)
Cumulative effect of accounting
  changes........................        --          --         (3.7)(j)       --           --           --        (25.3)(p)
Extraordinary items..............        --          --           --           --           --           --         (6.6)(q)
                                   --------    --------     --------     --------     --------     --------     --------
Net income.......................  $   54.1    $   58.7     $  129.6     $  133.4     $   36.1     $   80.7     $   34.7
                                   ========    ========     ========     ========     ========     ========     ========
Income per share from continuing
  operations:
  Basic..........................  $   1.20    $   1.15     $   2.61     $   2.68     $   2.04     $   2.20     $   2.17
  Diluted........................      1.19        1.14         2.60         2.62         2.01         2.16         2.13
Weighted average number of common
  shares outstanding:
  Basic..........................      45.2(h)     51.2(h)      50.2(h)      49.7         49.2         47.3         45.2
  Diluted........................      45.6(h)     51.5(h)      50.4(h)      52.3         51.8         50.1         48.0
Dividends per share..............  $   0.54    $   0.51     $  1.035     $  0.975     $   0.96     $  0.915     $   0.90
OTHER FINANCIAL DATA:
         Total assets............  $1,376.3    $1,549.9     $1,388.0     $1,551.0     $1,613.2     $1,357.9     $1,224.9
         Total debt..............     374.0       252.3        216.4        206.9        437.6        271.3        200.7
Stockholders' equity.............     489.7       722.4        629.7        743.8        578.1        547.9        525.2
Capital expenditures.............      24.6        26.3         56.5         59.3         49.0         74.8         55.1
Depreciation and amortization....      29.3        35.6         65.3         69.2         62.8         48.4         46.4
</TABLE>
 
Note: The accompanying notes are an integral part of the selected historical
      consolidated financial data.
 
                                       93
<PAGE>   105
 
          NOTES TO SELECTED HISTORICAL CONSOLIDATED FINANCIAL DATA OF
                                 GENERAL SIGNAL
                                  (unaudited)
                      (in millions, except per share data)
 
   
(a)  Certain reclassifications to General Signal's previously reported income
     data have been made to conform with the presentation of the combined
     company. These reclassifications include: (1) classifying certain
     engineering and research and development costs as selling, general and
     administrative expense rather than as cost of sales, (2) classifying
     goodwill and other intangible amortization as other operating expenses
     rather than selling, general and administrative expense, and (3)
     classifying gains on the sales of business units and breakup fees as other
     expenses (income) rather than other charges and credits. These
     reclassifications do not affect previously reported earnings from
     continuing operations before income taxes.
    
 
   
(b)  During 1997, General Signal sold GSPG to Pentair Inc. for approximately
     $200.0. General Signal recorded a pre-tax gain of $63.7, or $17.2
     after-tax. The effective tax rate on the sale of GSPG differs from the
     statutory rate due to a difference in book and tax basis of GSPG. Annual
     1996 sales of GSPG were approximately $201.0. See "Pro Forma Adjusted
     Historical Financial Data of General Signal." General Signal also sold its
     equity interest in a Mexican company for a $9.0 pre-tax gain, or $2.3
     after-tax.
    
 
   
(c)  During 1997, General Signal and Emerson formed EGS, a joint venture
     combining GSEG with Emerson's Appleton Electric operations. General Signal
     contributed substantially all of the operating assets of GSEG to EGS, in
     exchange for a 47.5% ownership interest in EGS. Annual 1996 sales of GSEG
     were approximately $294.0. General Signal records its investment in EGS
     under the equity method of accounting on a three month lag basis, effective
     January 1, 1998. See "Pro Forma Adjusted Historical Financial Data of
     General Signal."
    
 
   
     Pursuant to a letter agreement dated July 19, 1998, General Signal and
     Emerson have agreed that General Signal will acquire all of the assets and
     assume all of the liabilities of the Dual-Lite and Edwards divisions of EGS
     immediately prior to the consummation of the Merger. These divisions had
     been contributed to EGS by General Signal at the time of the formation of
     EGS. In exchange for these businesses, General Signal's ownership interest
     in EGS will be reduced from 47.5% to 44.5%. This transaction will not occur
     if the Merger Agreement is terminated. Had this transaction taken place on
     January 1, 1997, consolidated net sales and net income would not be
     significantly different from reported results.
    
 
(d)  In 1996, General Signal sold Kinney for $29.0 and recognized a pre-tax gain
     of $20.8. Annual 1995 sales of this business were approximately $25.0.
 
   
(e)  During 1995, General Signal made three significant acquisitions. In June,
     General Signal completed a cash tender offer for Best Power for $206.3. In
     July, General Signal acquired Waukesha Electric for $73.9. The acquisitions
     of Best Power and Waukesha Electric were recorded under the purchase method
     of accounting. In November, General Signal merged in a pooling of interests
     with Data Switch by exchanging 1.8 shares of General Signal Common Stock
     and 0.2 rights to receive General Signal Common Stock for all outstanding
     common stock and related options and warrants of Data Switch. Combined
     annual 1994 sales of these unrelated businesses were approximately $336.0.
    
 
(f)  Late in 1994, General Signal adopted a plan to sell L&N and Dynopower and
     recorded a charge of $25.8 after-tax on the disposal of these operations.
     Income from these discontinued operations in 1994 was $2.4 after-tax. As of
     December 31, 1996, substantially all related assets were sold. In 1995,
     General Signal recorded total charges of $64.0 after-tax for additional
     expected losses related to the disposal of these businesses. In 1997, due
     to less than expected losses, $2.3 after-tax of these charges were reversed
     into income. The financial results of these operations are included as
     discontinued operations through the date of divestiture. Annual 1993 sales
     of these businesses were approximately $176.0. The loss from these
     discontinued operations was $31.5 after-tax in 1993.
 
                                       94
<PAGE>   106
          NOTES TO SELECTED HISTORICAL CONSOLIDATED FINANCIAL DATA OF
                           GENERAL SIGNAL (CONTINUED)
                                  (unaudited)
                      (in millions, except per share data)
 
(g)  In 1993, General Signal merged in a pooling of interests with Revco by
     exchanging 2.6 shares of common stock for all of the outstanding common
     stock of Revco. Annual 1992 sales of this business were approximately
     $56.0.
 
(h)  In December 1996, General Signal called for the redemption of its 5.75%
     convertible subordinated notes. General Signal also initiated a share
     buy-back program of up to $100.0 to offset any shares issued as a result of
     the redemption. By April 1997, the program was completed with a total of
     2.5 shares repurchased for $100.0. In June 1997, General Signal initiated
     another share buy-back program of up to $150.0, subject to the consummation
     of the GSPG divestiture. In September 1997, this program was increased to
     $300.0. During 1997, 3.3 shares were purchased for $140.4 and during 1998,
     3.5 shares were purchased for $159.6 to complete this program.
 
   
(i)  During the second half of 1997, General Signal recorded a pre-tax gain of
     $10.0 on the settlement of patent litigation and sale of related patents.
     General Signal also recorded pretax charges of $27.9 for asset valuations,
     restructuring charges, lease termination costs and other matters. These
     charges and gains were recorded in cost of sales ($11.l) and in selling,
     general and administrative expense ($6.8).
    
 
(j)  In 1997, General Signal expensed all previously capitalized business
     process reengineering costs as a cumulative effect of a change in
     accounting principle of $3.7, net of income tax. This change was in
     accordance with Emerging Issues Task Force of the Financial Accounting
     Standards Board consensus 97-13, "Accounting for Costs Incurred in
     Connection with a Consulting Engagement or an Internal Project that
     Combines Business Process Reengineering and Information Technology
     Transformation."
 
(k)  During 1996, General Signal recorded $4.2 in net sales for a royalty
     settlement. General Signal also recorded pretax charges of $17.9 for asset
     write-downs, lease termination costs, severance, warranty repairs and
     environmental matters, net of an insurance gain on the recovery of
     destroyed assets. These charges were recorded in cost of sales ($13.0) and
     in selling, general and administrative expense ($4.9).
 
(l)  In 1995, a charge of $7.4 was recorded for severance and other
     consolidation costs relating to the combination of Best Power and existing
     General Signal facilities and a charge of $12.7 was recorded for
     transaction costs, severance and balance sheet valuation adjustments
     related to the merger with Data Switch.
 
   
(m) During 1994, General Signal recorded $46.2 of pre-tax charges for
    consolidation of operations, asset valuations, environmental matters, and
    other issues. The charges were recorded in cost of sales ($27.7), selling,
    general and administrative expense ($16.1), and income tax expense ($2.4).
    
 
(n)  In 1994, General Signal negotiated an agreement to merge with Reliance.
     Subsequent to the consummation of the agreement, Reliance was acquired by
     another company in a cash tender offer. Under the terms of the merger
     agreement, General Signal received $50.0 for break-up fees and $5.2 for
     partial reimbursement of expenses. General Signal incurred $9.0 of
     transaction costs in connection with the merger.
 
(o)  During 1993, General Signal substantially completed the divestiture of
     Semiconductor Equipment Operations with higher than expected proceeds from
     the sale of these units and lower than expected severance costs. As a
     result, $53.2 of excess reserves were returned to operating income. General
     Signal also recognized a $5.2 charge related to previously divested
     businesses and recorded a $15.0 charge primarily for factory and
     administrative consolidation and rearrangement as well as product
     restructuring and realignment. Additionally, transaction and consolidation
     costs of $13.2 related to the pooling of interests merger with Revco were
     expensed.
 
                                       95
<PAGE>   107
          NOTES TO SELECTED HISTORICAL CONSOLIDATED FINANCIAL DATA OF
                           GENERAL SIGNAL (CONTINUED)
                                  (unaudited)
                      (in millions, except per share data)
 
(p)  In 1993, General Signal adopted FAS 112 for accounting for postemployment
     benefits, primarily severance and long-term disability. The cumulative
     effect at January 1, 1993 of adopting FAS 112, $25.3, net of income taxes,
     was recorded as a cumulative effect of accounting change.
 
   
(q)  In 1993, General Signal recorded an extraordinary charge for early
     extinguishment of higher-rate debt and swap agreements of $10.7, or $6.6
     after-tax.
    
 
                                       96
<PAGE>   108
 
                          PRO FORMA CONDENSED COMBINED
                    FINANCIAL DATA OF SPX AND GENERAL SIGNAL
                                  (unaudited)
                      (in millions, except per share data)
 
   
     The following table presents selected pro forma condensed combined
statement of income and other financial data of SPX and General Signal. The
information is presented as if the Merger had occurred on January 1, 1997 for
statement of income and related data and on June 30, 1998 for balance sheet
data. The pro forma data assumes that the Merger is effected by the exchange of
0.4186 of a share of SPX Common Stock and $18.00 in cash for each share of
General Signal Common Stock, whereby an aggregate of 18.227 shares of SPX Common
Stock are issued and $783.8 in cash is paid in exchange for all outstanding
shares of General Signal Common Stock. Because the General Signal stockholders
will own a majority of the outstanding shares of SPX Common Stock upon
completion of the transaction, the Merger will be accounted for as a reverse
acquisition. Accordingly, for accounting purposes, SPX is treated as the
acquired company and General Signal is considered to be the acquiring company.
The purchase price will be allocated to the assets and liabilities assumed of
SPX based on their estimated fair market values at the acquisition date. Under
reverse acquisition accounting, the purchase price of SPX is based on the fair
market value of SPX Common Stock at the date that the Merger Agreement was
signed. The cash portion of the Merger Consideration will be accounted for as a
dividend by the combined company. SPX's financial position and results of
operations will not be included in General Signal's consolidated financial
statements prior to the date the Merger is consummated.
    
 
   
     Under reverse acquisition accounting, the purchase price of SPX is based on
the fair market value of SPX Common Stock. For purposes of accounting for this
business combination, the fair market value of SPX Common Stock is $64.50 per
share, which was the closing price of SPX Common Stock on July 17, 1998, the
last trading date prior to the date the Merger Agreement was signed. The Merger
Consideration includes 0.4186 of a share of SPX Common Stock for each share of
General Signal Common Stock. This is a fixed exchange ratio which will not be
adjusted in the event of any increase or decrease in the market price of SPX
Common Stock. Consequently, changes in the market price of SPX Common Stock will
not impact these pro forma financial statements.
    
 
     The pro forma condensed combined financial data are intended for
information purposes, and do not purport to represent what the combined entity's
results of continuing operations or financial position would actually have been
had the transaction in fact occurred at an earlier date, or project the results
for any future date or period. Upon consummation of the Merger, the actual
financial position and results of operations of the combined company will
differ, perhaps significantly, from the pro forma amounts reflected herein due
to a variety of factors, including changes in operating results between the date
of the pro forma condensed combined financial data and the date on which the
Merger is consummated and thereafter, as well as the factors discussed under
"Risk Factors."
 
     The pro forma condensed combined balance sheet reflects the estimated costs
associated with change of control agreements and other costs associated with
closing the corporate office of General Signal. Certain other change of control
agreement costs which are triggered by the Merger and are attributable to
General Signal employees who are not affected by the corporate office closing
are also reflected in the pro forma condensed combined balance sheet. The pro
forma condensed combined income statement does not reflect a charge for these
costs as they are non-recurring and have no continuing impact. Following the
Effective Time, SPX will be finalizing its strategic review of the combined
company and its plans to integrate the operations of General Signal. The pro
forma condensed combined financial data do not give effect to any additional
integration or restructuring costs that could result from that review and the
finalization of those plans. Any additional integration and rationalization of
the operations of General Signal may include certain costs that in turn would
result in a charge to earnings of the combined company. Such a charge, which
cannot now be quantified fully, may be material and would be recognized in the
period in which such a charge occurs. The costs may include severance and
related employee benefits costs, costs to consolidate manufacturing and
distribution facilities, facility rearrangement costs, relocation and moving
costs, training costs, and gains or losses on business divestitures, among
others.
 
                                       97
<PAGE>   109
 
     The pro forma condensed combined financial data do not give effect to any
cost savings that could result from the combination of the companies. SPX's and
General Signal's management estimate that the combined company can achieve
approximately $55.0 to $60.0 of annualized cost savings in the first full year
following the acquisition. These cost savings include estimated annual savings
of $35.0 associated with duplicative corporate office costs, $10.0 to $15.0
associated with combining material sourcing of the combined company, and $10.0
to $15.0 of cost reductions at the General Signal business units.
 
   
     In the pro forma condensed combined financial data, SPX's and General
Signal's historical information for the six months ended June 30, 1998 were
derived from SPX's Second Quarter Form 10-Q and General Signal's Second Quarter
Form 10-Q, respectively. For SPX's and General Signal's pro forma adjusted
historical financial data for the year ended December 31, 1997, see "Pro Forma
Adjusted Historical Financial Data of SPX" and "Pro Forma Adjusted Historical
Financial Data of General Signal," respectively, wherein certain divestitures by
the respective companies are reflected as having occurred as of January 1, 1997.
    
 
                                       98
<PAGE>   110
 
                          PRO FORMA CONDENSED COMBINED
                    FINANCIAL DATA OF SPX AND GENERAL SIGNAL
                     FOR THE SIX MONTHS ENDED JUNE 30, 1998
                                  (unaudited)
                      (in millions, except per share data)
 
   
<TABLE>
<CAPTION>
                                                               GENERAL
                                                   SPX          SIGNAL       PRO FORMA
                                                HISTORICAL    HISTORICAL    ADJUSTMENTS      PRO FORMA
                                                ----------    ----------    -----------      ---------
<S>                                             <C>           <C>           <C>              <C>
STATEMENT OF INCOME DATA:
Revenues......................................   $ 462.0        $776.1        $    --        $1,238.1
Cost of products sold.........................     332.7         505.7            1.7(d)        840.1
Selling, general and administrative expense...      83.4         186.6            1.7(d)        271.7
Other operating expenses, net.................       1.7           7.3            9.0(d)         18.0
Special charges and (gains)(k)................      (7.1)           --             --            (7.1)
                                                 -------        ------        -------        --------
Operating income..............................      51.3          76.5          (12.4)          115.4
Other expense (income), net...................      (1.4)           --             --            (1.4)
Equity earnings of EGS........................        --         (20.0)            --           (20.0)
Interest expense, net.........................       7.9           8.6           44.2(f)         60.7
                                                 -------        ------        -------        --------
Income before income taxes....................      44.8          87.9          (56.6)           76.1
Provision for income taxes....................      16.1          33.8          (18.1)(g)        31.8
                                                 -------        ------        -------        --------
Income from continuing operations.............   $  28.7        $ 54.1        $ (38.5)       $   44.3
                                                 =======        ======        =======        ========
Income per share:
  Basic.......................................   $  2.40                                     $   1.43
  Diluted.....................................      2.33                                         1.42
Weighted average number of common shares
  outstanding:
  Basic.......................................    11.972                       18.921(h)       30.893
  Diluted.....................................    12.342                       18.921(h)       31.263
Dividends per share (l).......................   $    --                                     $     --
OTHER FINANCIAL DATA:
Capital expenditures..........................   $  14.6        $ 24.6        $    --        $   39.2
Depreciation and amortization.................      12.0          29.3           11.5            52.8
</TABLE>
    
 
Note: The accompanying notes are an integral part of the pro forma condensed
      combined financial data.
 
                                       99
<PAGE>   111
 
                          PRO FORMA CONDENSED COMBINED
                    FINANCIAL DATA OF SPX AND GENERAL SIGNAL
                      FOR THE YEAR ENDED DECEMBER 31, 1997
                                  (unaudited)
                      (in millions, except per share data)
 
   
<TABLE>
<CAPTION>
                                                    SPX           GENERAL
                                                 PRO FORMA        SIGNAL
                                                 ADJUSTED        PRO FORMA      PRO FORMA
                                               HISTORICAL(a)   HISTORICAL(b)   ADJUSTMENTS    PRO FORMA
                                               -------------   -------------   -----------    ---------
<S>                                            <C>             <C>             <C>            <C>
STATEMENT OF INCOME DATA:
Revenues.....................................     $ 898.8        $1,601.5        $    --      $2,500.3
Cost of products sold........................       649.4         1,066.3            3.3(d)    1,719.0
Selling, general and administrative
  expense....................................       174.3           376.9            3.3(d)      554.5
Other operating expenses, net................         3.7            12.5           18.0(d)       34.2
Special charges and (gains)(k)...............       116.5              --             --         116.5
                                                  -------        --------        -------      --------
Operating income (loss)......................       (45.1)          145.8          (24.6)         76.1
Other expense (income), net..................        (2.3)           (9.0)            --         (11.3)
Equity earnings of EGS.......................          --           (38.8)            --         (38.8)
Interest expense, net........................        12.9             8.2           82.0(f)      103.1
                                                  -------        --------        -------      --------
Income (loss) before income taxes............       (55.7)          185.4         (106.6)         23.1
Provision (benefit) for income taxes.........       (20.0)           73.9          (33.7)(g)      20.2
                                                  -------        --------        -------      --------
Income (loss) from continuing
  operations(c)..............................     $ (35.7)       $  111.5        $ (72.9)     $    2.9
                                                  =======        ========        =======      ========
Income (loss) per share:
  Basic......................................     $ (2.80)                                    $   0.09
  Diluted....................................       (2.80)                                        0.08
Weighted average number of common shares
  outstanding:
  Basic......................................      12.754                         21.014(h)     33.768
  Diluted....................................      12.754                         21.565(h)     34.319
Dividends per share(l).......................     $  0.10                                     $   0.10
OTHER FINANCIAL DATA:
Capital expenditures.........................     $  21.6        $   48.3        $    --      $   69.9
Depreciation and amortization................        23.8            55.8           23.0         102.6
</TABLE>
    
 
Note: The accompanying notes are an integral part of the pro forma condensed
      combined financial data.
 
                                       100
<PAGE>   112
 
                          PRO FORMA CONDENSED COMBINED
                    BALANCE SHEET OF SPX AND GENERAL SIGNAL
                              AS OF JUNE 30, 1998
                                  (unaudited)
                                 (in millions)
   
    
 
   
<TABLE>
<CAPTION>
                                                                 GENERAL
                                                     SPX          SIGNAL       PRO FORMA
                                                  HISTORICAL    HISTORICAL    ADJUSTMENTS    PRO FORMA
                                                  ----------    ----------    -----------    ---------
<S>                                               <C>           <C>           <C>            <C>
ASSETS:
Current assets..................................    $392.1       $  543.2       $  10.5(i)   $  945.8
Property, plant and equipment, net..............     132.9          237.9          40.1(i)      410.9
Goodwill and intangible assets..................      96.1          258.1         (96.1)(i)   1,096.3
                                                                                  838.2(i)
Other assets....................................      21.8          337.1          32.0(i)      470.6
                                                                                   80.3(i)
                                                                                   (0.6)(i)
                                                    ------       --------       -------      --------
          Total assets..........................    $642.9       $1,376.3       $ 904.4      $2,923.6
                                                    ======       ========       =======      ========
 
LIABILITIES AND STOCKHOLDERS' EQUITY:
 
Notes payable and current maturities of
  long-term debt................................    $  3.2       $    9.2       $    --      $   12.4
Other current liabilities.......................     279.8          336.7            --         616.5
Total long-term liabilities, excluding long-term
  debt..........................................     139.5          175.9         (19.4)(i)     348.4
                                                                                   52.4(i)
Long-term debt..................................     258.8          364.8         890.2(e)    1,513.8
Total stockholders' equity (deficit)............     (38.4)         489.7         794.0(j)      432.5
                                                                                 (783.8)(j)
                                                                                  (57.4)(m)
                                                                                   38.4(j)
                                                                                  (10.0)(i)
                                                    ------       --------       -------      --------
          Total liabilities and stockholders'
            equity..............................    $642.9       $1,376.3       $ 904.4      $2,923.6
                                                    ======       ========       =======      ========
</TABLE>
    
 
Note: The accompanying notes are an integral part of the pro forma condensed
      combined balance sheet.
 
                                       101
<PAGE>   113
 
                     NOTES TO PRO FORMA CONDENSED COMBINED
                    FINANCIAL DATA OF SPX AND GENERAL SIGNAL
                                  (unaudited)
                      (in millions, except per share data)
 
   
(a)  Pro forma information for the year ended December 31, 1997 includes the pro
     forma adjusted historical results of SPX for the year then ended which
     reflects SPX's February 1997 disposition of the Sealed Power division as if
     such disposition has occurred on January 1, 1997. See "Pro Forma Adjusted
     Historical Financial Data of SPX."
    
 
   
(b)  Pro forma information for the year ended December 31, 1997 includes the pro
     forma adjusted historical results of General Signal for the year then ended
     which reflects General Signal's August 1997 disposition of GSPG and General
     Signal's September 1997 contribution of GSEG to a 47.5% owned joint venture
     as if such transactions occurred on January 1, 1997. See "Pro Forma
     Adjusted Historical Financial Data of General Signal."
    
 
(c)  The pro forma condensed combined financial data of SPX and General Signal
     reflect only results from continuing operations. SPX recorded a $10.3
     extraordinary item in the year ended December 31, 1997. General Signal
     recorded earnings from discontinued operations of $2.3 and a charge for the
     cumulative effect of accounting change of $3.7 in the year ended December
     31, 1997.
 
   
(d)  These pro forma adjustments reflect the impact of the allocation of the
     purchase price to the assets and liabilities of SPX on the pro forma
     condensed combined statement of income and other financial data. The
     ultimate allocation of the purchase price to the net assets acquired,
     goodwill and other intangible assets, liabilities assumed and in process
     technology of SPX is subject to final determination of their respective
     fair values, and as a result, these adjustments could change. The following
     table reflects the pro forma condensed combined statement of income impact
     of the purchase accounting adjustments:
    
 
   
<TABLE>
<CAPTION>
                                         COST OF     SELLING,      OTHER
                                         PRODUCTS    GENERAL     OPERATING
                                           SOLD      & ADMIN.    EXPENSES     TOTAL
                                         --------    --------    ---------    -----
<S>                                      <C>         <C>         <C>          <C>
Additional depreciation..............      $2.5        $2.5        $  --      $ 5.0
Pension expense adjustment...........       0.3         0.3           --        0.6
Amortization of previously recorded
  goodwill...........................        --          --         (3.0)      (3.0)
Goodwill and intangible amortization
  on transaction.....................        --          --         21.0       21.0
Postretirement expense adjustment....       0.5         0.5           --        1.0
                                           ----        ----        -----      -----
Year ended December 31, 1997.........      $3.3        $3.3        $18.0      $24.6
                                           ====        ====        =====      =====
Six months ended June 30, 1998.......      $1.7        $1.7        $ 9.0      $12.4
                                           ====        ====        =====      =====
</TABLE>
    
 
   
    Upon consummation of the transaction, an estimated $10.0 charge for in
    process technology will occur. However, this charge is not reflected in the
    pro forma data as the charge is non-recurring and has no significant
    continuing impact.
    
 
   
(e)  This pro forma adjustment reflects the borrowings for the cash portion of
     the Merger Consideration, payments under change of control agreements and
     of other costs associated with closing the corporate office of General
     Signal of $57.4, and estimated transaction fees of $49.0. The cash portion
     of the Merger Consideration is $783.8, which represents $18.00 per share of
     General Signal Common Stock multiplied by 43.543 shares of General Signal
     Common Stock to be exchanged.
    
 
   
(f)  These pro forma adjustments reflect the interest expense associated with
     the incremental borrowings ($890.2) to effect the Merger, as if the
     incremental borrowings had occurred at January 1, 1997. The pro forma
     interest expense adjustment also reflects the refinancing of existing debt
     under the new financing agreements as of January 1, 1997. The interest
     expense has been computed on an assumption that borrowings under the new
     credit facility will bear interest at a rate of LIBOR plus 2.65% (8.35% was
     used
    
 
                                       102
<PAGE>   114
                     NOTES TO PRO FORMA CONDENSED COMBINED
              FINANCIAL DATA OF SPX AND GENERAL SIGNAL (CONTINUED)
                                  (unaudited)
                      (in millions, except per share data)
 
   
     in these pro forma financial statements) and that debt issuance costs are
     amortized over seven years. If the interest rate used in the pro forma
     financial data were assumed to increase by 1/8%, the impact would be to
     decrease earnings by $0.5 ($0.02 per share) and by $1.2 ($0.03 per share)
     for the six months ended June 30, 1998 and for the year ended December 31,
     1997, respectively. Average combined historical outstanding debt of SPX and
     General Signal, as used in this pro forma presentation, was $507.9 and
     $290.3 for the six months ended June 30, 1998 and for the year ended
     December 31, 1997, respectively.
    
 
(g)  These adjustments represent the estimated income tax effect of the pro
     forma adjustments, excluding goodwill expense which will not be deductible
     for tax purposes, using an effective income tax rate of 38%.
 
   
(h) These pro forma adjustments reflect the additional shares of SPX Common
    Stock to be issued in the transaction. The additional shares to be issued
    are calculated assuming that the stock component of the Merger Consideration
    is 0.4186 of a share of SPX Common Stock, which converts weighted average
    outstanding shares of General Signal Common Stock to weighted average
    outstanding shares of SPX Common Stock. The shares of General Signal Common
    Stock used in these calculations include reported weighted average
    outstanding shares of General Signal Common Stock. Additionally, the pro
    forma adjustment for diluted weighted average number of common shares
    outstanding for the year ended December 31, 1997 includes 0.551 equivalent
    shares of SPX Common Stock related to SPX stock options. These equivalent
    shares of SPX Common Stock are not included in the SPX Pro Forma Adjusted
    Historical Financial Data of SPX diluted loss per share calculation as their
    effect was antidilutive.
    
 
   
(i)  These pro forma adjustments reflect the allocation to the assets and
     liabilities of SPX of the difference between the market value of SPX and
     SPX's book value (the "excess purchase price"). The market value of SPX is
     assumed to be the sum of the fair market value of the outstanding SPX
     Common Stock (less unallocated SPX Common Stock held by SPX's KSOP and
     restricted shares of SPX Common Stock) and the fair value of SPX's
     outstanding options. SPX's book value is assumed to be its stockholders'
     deficit adjusted by estimated transaction fees of $49.0 which are assumed
     to have been incurred by SPX and General Signal prior to the combination.
    
 
   
<TABLE>
<S>                                                           <C>       <C>
SPX's Market Value:
  Shares of SPX Common Stock outstanding....................   12.311
  Unallocated SPX Common Stock held in KSOP and Restricted
     SPX Common Stock.......................................   (0.621)
                                                              -------
  Adjusted SPX Common Stock outstanding.....................   11.690
  Market price per share of SPX Common Stock................    64.50
  Market value of SPX Common Stock outstanding..............  $ 754.0
  Market value of outstanding options.......................     40.0
  SPX's Market Value........................................            $794.0
SPX's Book Value:
  June 30, 1998 stockholders' deficit.......................  $ (38.4)
  Assumed transaction fees..................................    (49.0)
  SPX's Book Value..........................................             (87.4)
                                                                        ------
  Excess Purchase Price.....................................            $881.4
                                                                        ======
</TABLE>
    
 
                                       103
<PAGE>   115
                     NOTES TO PRO FORMA CONDENSED COMBINED
              FINANCIAL DATA OF SPX AND GENERAL SIGNAL (CONTINUED)
                                  (unaudited)
                      (in millions, except per share data)
 
          This excess purchase price has been allocated to the assets and
     liabilities of SPX as follows:
 
   
<TABLE>
<S>                                                           <C>
Inventories.................................................  $ 10.5
Property, plant and equipment...............................    40.1
Prepaid pension (other assets)..............................    80.3
Transaction costs (other assets)............................    32.0
Deferred financing fees (other assets)......................    (0.6)
Goodwill -- previously recorded.............................   (96.1)
Goodwill and intangible assets..............................   838.2
In process technology.......................................    10.0
Postretirement health and life insurance liability..........    19.4
Deferred tax liability......................................   (52.4)
                                                              ------
                                                              $881.4
                                                              ======
</TABLE>
    
 
   
     The preliminary allocations of the excess purchase price are based upon
     current estimates and information available to SPX. Property, plant and
     equipment reflect the adjustment to estimated fair market values of these
     assets. Prepaid pension reflects the adjustment to the fair market value of
     the plan assets less the projected benefit obligation. Transaction costs
     include fees to consummate the Merger. Goodwill, previously recorded,
     reflects the elimination of goodwill that is included in SPX's historical
     balance sheet. Goodwill and intangible assets reflects the amount of excess
     purchase price remaining after allocations to all other assets and
     liabilities. In process technology represents the estimated fair market
     value of in process product development costs. Postretirement health and
     life insurance liability reflects the adjustment of the liability to the
     accumulated benefit obligation. The deferred tax liability reflects the
     deferred tax liabilities related to these allocations.
    
 
     The goodwill recorded as a result of these allocations will be amortized
     over a 40 year life. In determining the estimated useful life, management
     considered the nature, competitive position, life cycle position, and
     historical and expected future operating income of SPX, as well as
     management's commitment to support SPX through continued investment in
     capital expenditures, operational improvements, and research and
     development. After the transaction, the combined company will continually
     review whether subsequent events and circumstances have occurred that
     indicate the remaining estimated useful life of goodwill may warrant
     revision or that the remaining balance of goodwill may not be recoverable.
     If events and circumstances indicate that goodwill related to a particular
     business should be reviewed for possible impairment, the combined company
     will use projections to assess whether future operating income on a
     non-discounted basis (before goodwill amortization) of the unit is likely
     to exceed the goodwill amortization over the remaining life of the
     goodwill, to determine whether a write-down of goodwill to recoverable
     value is appropriate.
 
     The ultimate allocation of the purchase price to the net assets acquired,
     goodwill, other intangible assets, liabilities assumed and in process
     technology is subject to final determination of their respective fair
     values. This final allocation will be based upon the results of appraisals
     and other studies that will be performed upon the consummation of the
     transaction. SPX's management believes the above preliminary allocations of
     the purchase price are reasonable and will not materially change upon
     completion of the appraisals and other studies.
 
     As of June 30, 1998, there were no intercompany transactions that required
     elimination.
 
(j)  These pro forma adjustments reflect the effect of reverse acquisition
     accounting by adding the market value of SPX ($794.0), subtracting SPX's
     June 30, 1998 stockholder deficit ($38.4), and subtracting the cash payout
     ($783.8) which is treated as a dividend by the combined company.
 
                                       104
<PAGE>   116
                     NOTES TO PRO FORMA CONDENSED COMBINED
              FINANCIAL DATA OF SPX AND GENERAL SIGNAL (CONTINUED)
                                  (unaudited)
                      (in millions, except per share data)
 
(k)  The pro forma condensed combined financial data of SPX and General Signal
     for the six months ended June 30, 1998 include SPX's special gain of $13.7
     realized on SPX's investment in Echlin Inc. which was liquidated during the
     second quarter of 1998 and $6.6 of expenses associated with SPX's offer to
     acquire Echlin Inc.
 
     The pro forma condensed combined financial data of SPX and General Signal
     for the year ended December 31, 1997 include special charges of $110.0
     recorded by SPX primarily to combine two divisions and to recognize reduced
     carrying value of certain assets resulting from the decision to combine the
     divisions and exit certain product lines and a $6.5 special charge recorded
     by SPX of anticipated future legal costs associated with the ongoing
     litigation with Snap-on Incorporated. See "Selected Historical Financial
     Data of SPX."
 
(l)  Represents the historical quarterly cash dividend per share of SPX for the
     periods presented. In April 1997, SPX eliminated its quarterly cash
     dividend and stated that future distributions to stockholders would be in
     the form of open market purchases of SPX Common Stock when deemed
     appropriate by management.
 
   
(m) Represents estimated charge of $72.4, or $57.4 after-tax, that will be
    recorded by the combined company at the Effective Time for costs associated
    with change of control agreements and the closing of General Signal's
    corporate office. Included in this pre-tax amount are $23.7 of payments
    representing the difference between the exercise price and $45.00 (the per
    share deemed value of the General Signal Common Stock for purposes of the
    Merger) to cancel the General Signal Options, $11.3 of payments representing
    $45.00 multiplied by the number of outstanding Restricted Shares, $35.4 for
    salary continuation, financial planning and health care for General Signal's
    affected employees, and $2.0 for holding costs associated with the vacated
    General Signal's corporate office building. It is possible that certain of
    General Signal's corporate office employees will relocate to other
    operations of the combined company and the associated salary continuation
    amounts included in the disclosures above will not be paid. This aggregate
    charge is not reflected in the pro forma statement of income data as the
    charge is non-recurring and has no continuing impact. The charge does not
    include a pre-tax amount of $15.5 related to salary continuation benefits
    available under change of control agreements with General Signal's unit
    presidents. It is SPX's intention that these individuals will continue in
    their positions after the Merger is consummated.
    
 
                                       105
<PAGE>   117
 
              PRO FORMA ADJUSTED HISTORICAL FINANCIAL DATA OF SPX
                                  (unaudited)
                      (in millions, except per share data)
 
     In February 1997, SPX completed the sale of substantially all of the assets
and rights used in the manufacture and distribution of piston rings and cylinder
liners, known as the Sealed Power division ("SPD"). The gross cash sales
proceeds were $223.0.
 
     The following historical financial data include the results of SPD through
February 7, 1997, its date of disposition. The following unaudited pro forma
adjusted historical financial data for the year ended December 31, 1997 reflect
the disposition of this division as if it had occurred as of January 1, 1997.
The pro forma adjusted historical financial data do not purport to represent
what SPX's results of continuing operations would actually have been had the
transaction in fact occurred as of January 1, 1997, or project the results for
any future period.
 
     The pro forma adjusted historical financial data of SPX should be read in
conjunction with the financial statements and notes thereto included in SPX's
1997 Form 10-K.
 
                                       106
<PAGE>   118
 
              PRO FORMA ADJUSTED HISTORICAL FINANCIAL DATA OF SPX
                      FOR THE YEAR ENDED DECEMBER 31, 1997
                                  (unaudited)
                      (in millions, except per share data)
 
<TABLE>
<CAPTION>
                                                                         PRO FORMA
                                                                        ADJUSTMENTS            PRO
                                                                    -------------------       FORMA
                                                      HISTORICAL    DIVEST(A)    OTHER       ADJUSTED
                                                      ----------    ---------    ------      --------
<S>                                                   <C>           <C>          <C>         <C>
STATEMENT OF INCOME DATA:
Revenues............................................    $922.3       $(23.5)     $   --       $898.8
Cost of products sold...............................     669.0        (19.6)         --        649.4
Selling, general and administrative.................     175.3         (1.0)         --        174.3
Other operating expenses, net.......................       3.9         (0.2)         --          3.7
Special charges(e)..................................     116.5           --          --        116.5
                                                        ------       ------      ------       ------
Operating income (loss).............................     (42.4)        (2.7)         --        (45.1)
Other (income) expense..............................     (74.2)          --        71.9(b)      (2.3)
Interest expense, net...............................      13.9           --        (1.0)(c)     12.9
                                                        ------       ------      ------       ------
Income (loss) before income taxes...................      17.9         (2.7)      (70.9)       (55.7)
Provision (benefit) for income taxes................      21.3         (1.0)      (40.3)(d)    (20.0)
                                                        ------       ------      ------       ------
Income (loss) from continuing operations(f).........    $ (3.4)      $ (1.7)     $(30.6)      $(35.7)
                                                        ======       ======      ======       ======
Income (loss) per share:
  Basic.............................................    $(0.27)                               $(2.80)
  Diluted...........................................     (0.27)                                (2.80)
Weighted average number of common shares
  outstanding:
  Basic.............................................    12.754                                12.754
  Diluted...........................................    12.754                                12.754
OTHER FINANCIAL DATA:
Capital expenditures................................    $ 22.6       $ (1.0)                  $ 21.6
Depreciation and amortization.......................      25.0         (1.2)                    23.8
</TABLE>
 
- ---------------
(a) This column removes the operating results of SPD for the period January 1,
    1997 to February 7, 1997, its date of disposition.
 
(b) Adjustment to exclude the gain on the sale of SPD.
 
   
(c) Adjustment to interest expense, net assuming the use of net proceeds to
    reduce revolving credit and other debt.
    
 
(d) Adjustment to income tax expense to reflect the tax effect of the
    adjustments.
 
(e) Reflects a reclassification to special charges of $6.5 of legal costs to
    special charges that were previously classified as other expense (income),
    net in SPX's Quarterly Report on Form 10-Q for the quarter ended June 30,
    1997.
 
(f) Income excludes extraordinary item of $10.3, net of taxes.
 
                                       107
<PAGE>   119
 
         PRO FORMA ADJUSTED HISTORICAL FINANCIAL DATA OF GENERAL SIGNAL
                                  (unaudited)
                      (in millions, except per share data)
 
   
     In August 1997, General Signal sold substantially all of the assets of
GSPG, a unit of the Process Controls sector. The gross cash proceeds were
approximately $200.0.
    
 
   
     In September 1997, General Signal and Emerson formed EGS, a joint venture
combining Emerson's Appleton Electric operations and GSEG's operations. General
Signal contributed substantially all of the operating assets of GSEG in exchange
for 47.5 percent of EGS.
    
 
     The following historical financial data include the results of GSPG through
August 23, 1997 (its date of disposition) and the results of GSEG through
September 15, 1997 (the date of contribution of the operations to the joint
venture). The following unaudited pro forma adjusted historical financial data
for the year ended December 31, 1997 reflect these transactions as if they had
occurred as of January 1, 1997. The pro forma adjusted historical financial data
do not purport to represent what General Signal's results of continuing
operations would actually have been had the transactions in fact occurred as of
January 1, 1997, or project the results of any future period.
 
     The pro forma adjusted historical financial data should be read in
conjunction with the financial statements and notes thereto included in General
Signal's 1997 Form 10-K.
 
                                       108
<PAGE>   120
 
         PRO FORMA ADJUSTED HISTORICAL FINANCIAL DATA OF GENERAL SIGNAL
                      FOR THE YEAR ENDED DECEMBER 31, 1997
                                  (unaudited)
                      (in millions, except per share data)
 
<TABLE>
<CAPTION>
                                                      PRO FORMA ADJUSTMENTS                   PRO
                                                     -----------------------                 FORMA
                                                     HISTORICAL    DIVEST(a)    OTHER       ADJUSTED
                                                     ----------    ---------    ------      --------
<S>                                                  <C>           <C>          <C>         <C>
STATEMENT OF INCOME DATA:
Net sales..........................................   $1,954.6      $(353.1)    $   --      $1,601.5
Cost of sales......................................    1,313.6       (247.3)        --       1,066.3
Selling, general and administrative................      444.9        (68.0)        --         376.9
Other operating expenses, net......................       14.6         (2.1)        --          12.5
                                                      --------      -------     ------      --------
Operating earnings.................................      181.5        (35.7)        --         145.8
Other expense (income).............................      (72.7)          --       63.7(b)       (9.0)
Equity in earnings of EGS..........................      (11.8)          --      (27.0)(c)     (38.8)
Interest expense, net..............................       13.2           --       (5.0)(d)       8.2
                                                      --------      -------     ------      --------
Earnings from continuing operations before income
  taxes............................................      252.8        (35.7)     (31.7)        185.4
Income taxes.......................................      121.8        (13.7)     (34.2)(e)      73.9
                                                      --------      -------     ------      --------
Earnings from continuing operations(f).............   $  131.0      $ (22.0)    $  2.5      $  111.5
                                                      ========      =======     ======      ========
Income per share:
  Basic............................................   $   2.61                              $   2.22
  Diluted..........................................       2.60                                  2.21
Weighted average number of common shares
  outstanding:
  Basic............................................       50.2                                  50.2
  Diluted..........................................       50.4                                  50.4
OTHER FINANCIAL DATA:
Capital expenditures...............................   $   56.5      $  (8.2)        --      $   48.3
Depreciation and amortization......................       65.3         (9.5)        --          55.8
</TABLE>
 
- ---------------
   
(a)  This column removes the operating results of GSPG for the period January 1,
     1997 to August 23, 1997, its date of disposition. This column also removes
     the operating results of GSEG for the period January 1, 1997 to September
     15, 1997, its date of contribution to EGS.
    
 
(b)  Adjustment to exclude the gain on GSPG. No gain or loss was recorded on the
     contribution of GSEG to EGS.
 
(c)  Adjustment to recognize General Signal's estimated share of EGS' pro forma
     earnings from January 1, 1997 to September 15, 1997.
 
   
(d)  Adjustment to interest expense, net assuming the use of net proceeds to
     reduce debt.
    
 
(e)  Adjustment to income tax expense to reflect the tax effect of the
     adjustments.
 
(f)  Earnings from continuing operations excludes earnings from discontinued
     operations of $2.3, and a charge for the cumulative effect of accounting
     changes of $3.7.
 
                                       109
<PAGE>   121
 
                                    EXPERTS
 
     The audited consolidated financial statements of SPX included in SPX's 1997
Form 10-K incorporated by reference in this Joint Proxy Statement/Prospectus and
elsewhere in this Registration Statement have been audited by Arthur Andersen
LLP, independent public accountants, as indicated in their report with respect
thereto, and is incorporated by reference herein in reliance upon the authority
of said firm as experts in giving said reports.
 
     The consolidated financial statements and schedule of General Signal
appearing in General Signal's 1997 Form 10-K have been audited by Ernst & Young
LLP, independent auditors, as set forth in their report thereon included therein
and incorporated herein by reference. Such consolidated financial statements and
schedule are incorporated herein in reliance upon such report given upon the
authority of such firm as experts in accounting and auditing.
 
                                 LEGAL MATTERS
 
     The validity of the SPX Common Stock to be issued by SPX pursuant to the
Merger will be passed upon by Fried, Frank, Harris, Shriver & Jacobson (a
partnership including professional corporations). Certain United States federal
income tax consequences of the Merger will be passed upon by Fried, Frank,
Harris, Shriver & Jacobson (a partnership including professional corporations)
on behalf of SPX and by Wachtell, Lipton, Rosen & Katz on behalf of General
Signal.
 
                             STOCKHOLDER PROPOSALS
 
     Proposals of stockholders intended for inclusion in SPX's proxy statement
relating to the 1999 Annual Meeting must be received at SPX's principal
executive offices (please address to the attention of the Corporate Secretary)
not later than November 25, 1998.
 
     General Signal will hold an annual meeting of stockholders in 1999 if the
Merger is not consummated. In the event that a stockholder desires to have a
proposal included in the proxy statement and form of proxy for the 1999 Annual
Meeting of Stockholders, the proposal must be received by General Signal at its
principal office in Stamford, Connecticut, no later than November 19, 1998.
 
                                       110
<PAGE>   122
 
                                                                      APPENDIX A
 
                          AGREEMENT AND PLAN OF MERGER
 
                                     AMONG
 
                                SPX CORPORATION,
 
                                   SAC CORP.
 
                                      AND
 
                           GENERAL SIGNAL CORPORATION
 
                           DATED AS OF JULY 19, 1998
<PAGE>   123
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                                              PAGE
                                                                              ----
<S>             <C>                                                           <C>
ARTICLE I
THE MERGER
SECTION 1.1.    The Merger..................................................  A-1
SECTION 1.2.    Closing.....................................................  A-1
SECTION 1.3.    Effective Time..............................................  A-1
SECTION 1.4.    Effects of the Merger.......................................  A-1
SECTION 1.5.    Certificate of Incorporation and Bylaws.....................  A-1
SECTION 1.6.    Directors; Officers.........................................  A-2
SECTION 1.7.    Change in Merger Structure..................................  A-2
ARTICLE II
EFFECT OF THE MERGER ON THE STOCK OF THE
CONSTITUENT CORPORATIONS; EXCHANGE OF CERTIFICATES
SECTION 2.1.    Conversion of Securities....................................  A-2
SECTION 2.2.    Exchange of Certificates....................................  A-6
SECTION 2.3.    Stock Transfer Books........................................  A-8
SECTION 2.4.    Company Options and Restricted Shares.......................  A-8
SECTION 2.5.    Appraisal Rights............................................  A-8
ARTICLE III
REPRESENTATIONS AND WARRANTIES OF THE COMPANY
SECTION 3.1.    Organization, Qualification, Etc............................  A-8
SECTION 3.2.    Capital Stock...............................................  A-9
SECTION 3.3.    Corporate Authority; No Violation...........................  A-10
SECTION 3.4.    Reports and Financial Statements............................  A-11
SECTION 3.5.    No Undisclosed Liabilities..................................  A-11
SECTION 3.6.    Compliance with Laws........................................  A-11
SECTION 3.7.    Environmental Laws..........................................  A-12
SECTION 3.8.    Employee Benefit Plans......................................  A-12
SECTION 3.9.    Absence of Certain Changes or Events........................  A-13
SECTION 3.10.   Litigation..................................................  A-14
SECTION 3.11.   Material Contracts..........................................  A-14
SECTION 3.12.   Labor Matters...............................................  A-14
SECTION 3.13.   Tax Matters.................................................  A-14
SECTION 3.14.   Opinion of Financial Advisor................................  A-15
SECTION 3.15.   Takeover Laws; Company Rights Agreement.....................  A-15
SECTION 3.16.   Required Vote of the Company Shareholders...................  A-15
SECTION 3.17.   Finders or Brokers..........................................  A-15
ARTICLE IV
REPRESENTATIONS AND WARRANTIES OF PARENT
SECTION 4.1.    Organization, Qualification, Etc............................  A-16
SECTION 4.2.    Capital Stock...............................................  A-16
SECTION 4.3.    Corporate Authority; No Violation...........................  A-17
SECTION 4.4.    Reports and Financial Statements............................  A-18
SECTION 4.5.    No Undisclosed Liabilities..................................  A-18
SECTION 4.6.    Compliance with Laws........................................  A-18
SECTION 4.7.    Environmental Laws..........................................  A-18
</TABLE>
 
                                       A-i
<PAGE>   124
 
   
<TABLE>
<CAPTION>
                                                                              PAGE
                                                                              ----
<S>             <C>                                                           <C>
SECTION 4.8.    Employee Benefit Plans......................................  A-19
SECTION 4.9.    Absence of Certain Changes or Events........................  A-20
SECTION 4.10.   Litigation..................................................  A-20
SECTION 4.11.   Material Contracts..........................................  A-20
SECTION 4.12.   Labor Matters...............................................  A-20
SECTION 4.13.   Tax Matters.................................................  A-20
SECTION 4.14.   Opinion of Financial Advisor................................  A-21
SECTION 4.15.   Takeover Laws; Parent Rights Agreement......................  A-21
SECTION 4.16.   Required Vote of Parent Stockholders........................  A-21
SECTION 4.17.   Finders or Brokers..........................................  A-22
SECTION 4.18.   Financing...................................................  A-22
ARTICLE V
COVENANTS AND AGREEMENTS
SECTION 5.1.    Conduct of Business by the Company and Parent...............  A-22
SECTION 5.2.    Investigation...............................................  A-24
SECTION 5.3.    Stockholder Approval; Filings...............................  A-24
SECTION 5.4.    Additional Reports..........................................  A-25
SECTION 5.5.    Reasonable Best Efforts.....................................  A-25
SECTION 5.6.    Accountants' "Comfort" Letters..............................  A-26
SECTION 5.7.    Takeover Statutes...........................................  A-26
SECTION 5.8.    No Solicitation.............................................  A-26
SECTION 5.9.    Public Announcements........................................  A-27
SECTION 5.10.   Indemnification and Insurance...............................  A-27
SECTION 5.11.   Notification of Certain Matters.............................  A-28
SECTION 5.12.   Board of Directors and Officers of Parent...................  A-28
SECTION 5.13.   Employee Plans and Benefit Arrangements.....................  A-28
ARTICLE VI
CONDITIONS TO THE MERGER
                Conditions to Each Party's Obligation to Effect the
SECTION 6.1.    Merger......................................................  A-29
                Conditions to Obligations of the Company to Effect the
SECTION 6.2.    Merger......................................................  A-29
SECTION 6.3.    Conditions to Obligations of Parent to Effect the Merger....  A-30
ARTICLE VII
TERMINATION, WAIVER, AMENDMENT AND CLOSING
SECTION 7.1.    Termination or Abandonment..................................  A-30
SECTION 7.2.    Effect of Termination.......................................  A-31
SECTION 7.3.    Termination Payments........................................  A-31
ARTICLE VIII
MISCELLANEOUS
SECTION 8.1.    No Survival of Representations and Warranties...............  A-33
SECTION 8.2.    Expenses....................................................  A-33
SECTION 8.3.    Counterparts; Effectiveness.................................  A-33
SECTION 8.4.    Governing Law...............................................  A-33
SECTION 8.5.    Notices.....................................................  A-33
SECTION 8.6.    Assignment; Binding Effect..................................  A-34
SECTION 8.7.    Severability................................................  A-34
SECTION 8.8.    Enforcement of Agreement....................................  A-34
</TABLE>
    
 
                                      A-ii
<PAGE>   125
 
<TABLE>
<CAPTION>
                                                                              PAGE
                                                                              ----
<S>             <C>                                                           <C>
SECTION 8.9.    Miscellaneous...............................................  A-35
SECTION 8.10.   Headings....................................................  A-35
SECTION 8.11.   Certain Definitions.........................................  A-35
SECTION 8.12.   Knowledge...................................................  A-35
</TABLE>
 
EXHIBITS
 
Exhibit A       Form of Certificate of Incorporation of Merger Sub
 
Exhibit B       Form of Opinion of Wachtell, Lipton, Rosen & Katz
 
Exhibit C       Form of Opinion of Fried, Frank, Harris, Shriver & Jacobson
 
                                      A-iii
<PAGE>   126
 
                             INDEX OF DEFINED TERMS
 
<TABLE>
<CAPTION>
                            TERM                                  SECTION
                            ----                              ----------------
<S>                                                           <C>
Affiliates..................................................  8.11
Agreement...................................................  Preamble
Alternative Legal Opinions..................................  5.3(f)
Alternative Transaction.....................................  1.7
Cash Election...............................................  2.1(f)
Cash Fraction...............................................  2.1(g)(C)(1)(ii)
Closing.....................................................  1.2
Closing Date................................................  1.2
Code........................................................  Recitals
Commitment Expenses.........................................  7.3(c)(ii)
Company.....................................................  Preamble
Company Affiliated Group....................................  5.13(c)
Company Board Recommendation................................  3.3(a)
Company Business Combination................................  7.3(e)
Company Compensation and Benefit Plans......................  3.8(a)
Company Competing Transaction...............................  5.8(a)
Company Contracts...........................................  3.3(b)
Company Disclosure Letter...................................  Article III
Company ERISA Affiliate.....................................  3.8(d)
Company Meeting.............................................  5.3(a)(i)
Company Options.............................................  3.2(a)(ii)
Company Pension Plan........................................  3.8(c)
Company Plans...............................................  3.2(a)(ii)
Company Preferred Stock.....................................  3.2(a)
Company Rights Agreement....................................  3.2(a)(i)
Company Rights..............................................  3.2(a)(i)
Company SEC Reports.........................................  3.4
Company Shareholder Approval................................  3.16
Company Termination Fee.....................................  7.3(a)
Company Third Party.........................................  5.8(a)
Company Triggering Event....................................  7.3(a)
Company Warrants............................................  3.2(a)(iii)
Company's 1997 Form 10-K....................................  3.1(a)
Confidentiality Agreements..................................  5.2
Contracts...................................................  3.3(b)
Decrees.....................................................  3.6(a)
Delaware Certificate of Merger..............................  1.3
Delaware Secretary of State.................................  1.3
DGCL........................................................  1.1
Effective Time..............................................  1.3
Election Deadline...........................................  2.1(j)
Encumbrances................................................  3.1(b)
Environmental Decrees.......................................  3.7
Environmental Laws..........................................  3.7
ERISA.......................................................  3.8(c)
Exchange Act................................................  3.3(c)
</TABLE>
 
                                      A-iv
<PAGE>   127
 
<TABLE>
<CAPTION>
                            TERM                                  SECTION
                            ----                              ----------------
<S>                                                           <C>
Exchange Agent..............................................  2.1(j)
Exchange Fund...............................................  2.2(a)
Expense Fee.................................................  7.3(c)(i)
Financing Commitments.......................................  4.18
Financing Funds.............................................  4.18
Form of Election............................................  2.1(f)
GAAP........................................................  3.4
Governmental Entity.........................................  3.3(c)
Guarantee of Delivery.......................................  2.1(j)
Hazardous Substances........................................  3.7
Holco.......................................................  1.7
HSR Act.....................................................  3.3(c)
Indemnified Parties.........................................  5.10(a)
Joint Proxy Statement.......................................  5.3(b)
Laws........................................................  3.6(a)
Lazard......................................................  3.14
Letter of Transmittal.......................................  2.2(b)
Litigation..................................................  3.7
Material Adverse Effect.....................................  3.1(a)
Merger......................................................  Recitals
Merger Consideration........................................  2.2(c)
Merger Sub..................................................  Preamble
Mixed Election..............................................  2.1(f)
Multiemployer Plan..........................................  3.8(b)
New York Certificate of Merger..............................  1.3
New York Department of State................................  1.3
Non-Election Fraction.......................................  2.1(i)(D)(1)(ii)
Non-Election................................................  2.1(f)
NYBCL.......................................................  1.1
NYSE........................................................  2.1(j)
Parent......................................................  Preamble
Parent Board Recommendation.................................  4.3(a)
Parent Business Combination.................................  7.3(f)
Parent Change in Control Event..............................  4.8(h)
Parent Common Stock.........................................  2.1(c)
Parent Compensation and Benefit Plans.......................  4.8(a)
Parent Contracts............................................  4.3(b)
Parent Disclosure Letter....................................  Article IV
Parent ERISA Affiliate......................................  4.8(d)
Parent Meeting..............................................  5.3(a)(ii)
Parent Pension Plan.........................................  4.8(c)
Parent Preferred Stock......................................  4.2
Parent Rights Agreement.....................................  4.2(i)
Parent Rights...............................................  4.2(i)
Parent's 1997 Form 10-K.....................................  4.1(a)
Parent SEC Reports..........................................  4.4
Parent Stockholder Approval.................................  4.16
Parent Stockholder Proposal.................................  5.3(a)(ii)
</TABLE>
 
                                       A-v
<PAGE>   128
 
<TABLE>
<CAPTION>
                            TERM                                  SECTION
                            ----                              ----------------
<S>                                                           <C>
Parent Termination Fee......................................  7.3(b)
Parent Triggering Event.....................................  7.3(b)
Pension Plan................................................  3.8(c)
Per Share Cash Amount.......................................  2.1(c)
Per Share Mixed Consideration...............................  2.1(c)
Per Share Stock Amount......................................  2.1(c)
person......................................................  8.11
Registration Statement......................................  5.3(b)
Representative..............................................  2.1(f)
Restricted Shares...........................................  3.2(a)(iv)
SEC.........................................................  3.1(b)
Securities Act..............................................  3.3(c)
Share.......................................................  1.7
Share Arrangements..........................................  3.1(b)
Significant Subsidiary......................................  3.1(b)
Stock Certificates..........................................  2.1(c)
Stock Election..............................................  2.1(f)
Stock Fraction..............................................  2.1(h)(C)(1)
Subsidiaries................................................  8.11
Superior Transaction........................................  5.8(d)
Surviving Corporation.......................................  1.1
Takeover Laws...............................................  3.15(a)
Taxes.......................................................  3.13(b)(i)
Tax Return..................................................  3.13(b)(ii)
U.S. Company Compensation and Benefit Plans.................  3.8(a)
U.S. Parent Compensation and Benefit Plans..................  4.8(a)
U.S. Subsidiary.............................................  8.11
Unvested Restricted Shares..................................  2.4(b)
</TABLE>
 
                                      A-vi
<PAGE>   129
 
     THIS AGREEMENT AND PLAN OF MERGER, dated as of July 19, 1998 (this
"Agreement"), is among SPX Corporation, a Delaware corporation ("Parent"), SAC
Corp., a Delaware corporation ("Merger Sub"), and General Signal Corporation, a
New York corporation (the "Company").
 
     WHEREAS, the respective Boards of Directors of Parent, Merger Sub and the
Company have approved and have declared advisable the merger of the Company with
and into Merger Sub (the "Merger"), upon the terms and subject to the conditions
set forth herein, and have determined that the Merger and the other transactions
contemplated hereby are in the best interests of their respective companies and
shareholders;
 
     WHEREAS, the parties intend that the Merger constitute a "reorganization"
within the meaning of Section 368(a) of the Internal Revenue Code of 1986, as
amended (the "Code"); and
 
     WHEREAS, the parties desire to make certain representations, warranties,
covenants and agreements in connection with the Merger and also to prescribe
various conditions to the Merger.
 
     NOW, THEREFORE, in consideration of the mutual agreements, provisions and
covenants contained in this Agreement, the parties hereby agree as follows:
 
                                   ARTICLE I
 
                                   THE MERGER
 
     SECTION 1.1. The Merger. Upon the terms and subject to the conditions set
forth in this Agreement, and in accordance with the New York Business
Corporation Law (the "NYBCL") and the Delaware General Corporation Law (the
"DGCL"), the Company shall be merged with and into Merger Sub at the Effective
Time (as defined in Section 1.3). Following the Effective Time, the separate
corporate existence of the Company shall cease and Merger Sub shall be the
surviving corporation (the "Surviving Corporation") and shall succeed to and
assume all the rights and obligations of the Company in accordance with the
NYBCL and the DGCL.
 
     SECTION 1.2. Closing. The closing of the Merger (the "Closing") will take
place at 10:00 a.m., local time, at the offices of Fried, Frank, Harris, Shriver
& Jacobson, One New York Plaza, New York, New York 10004 on a date to be
specified by the parties (the "Closing Date"), which shall be no later than the
second business day after the first date that all of the conditions set forth in
Sections 6.1 (a) through (e) have been satisfied or waived, unless another
place, time or date is agreed to by the parties hereto.
 
     SECTION 1.3. Effective Time. Subject to the provisions of this Agreement,
as soon as practicable on or after the Closing Date, the parties (i) shall file
with the Department of State for the State of New York (the "New York Department
of State") a certificate of merger or other appropriate documents (in any such
case, the "New York Certificate of Merger") executed in accordance with the
relevant provisions of the NYBCL and (ii) shall file with the Secretary of State
for the State of Delaware (the "Delaware Secretary of State") a certificate of
merger or other appropriate documents (in any such case, the "Delaware
Certificate of Merger") executed in accordance with the relevant provisions of
the DGCL and (iii) shall make all other filings or recordings required under the
NYBCL and the DGCL, in each case necessary to effect the Merger. The Merger
shall become effective at the time of the filing of the New York Certificate of
Merger with the New York Department of State in accordance with the NYBCL and
the Delaware Certificate of Merger with the Delaware Secretary of State in
accordance with the DGCL, or at such subsequent date or time as Parent and the
Company shall agree and specify in the New York Certificate of Merger and the
Delaware Certificate of Merger (the time the Merger becomes effective being
hereinafter referred to as the "Effective Time").
 
     SECTION 1.4. Effects of the Merger. The Merger shall have the effects set
forth in Section 906 of the NYBCL and Section 259 of the DGCL.
 
     SECTION 1.5. Certificate of Incorporation and Bylaws. (a) The certificate
of incorporation of Merger Sub, in the form attached hereto as Exhibit A, shall
be the certificate of incorporation of the Surviving Corporation until
thereafter changed or amended.
 
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<PAGE>   130
 
     (b) The bylaws of Merger Sub, as in effect immediately prior to the
Effective Time, which shall contain indemnification provisions no less favorable
to directors and officers of the Company than the corresponding provisions in
the Company's bylaws as of the date hereof, until thereafter changed or amended,
shall be the bylaws of the Surviving Corporation.
 
     SECTION 1.6. Directors; Officers. The directors and officers of Merger Sub
at the Effective Time shall be the directors and officers, respectively, of the
Surviving Corporation until their respective successors are duly elected and
qualified.
 
     SECTION 1.7. Change in Merger Structure. By mutual agreement, the Company
and Parent may at any time change the method and determine a new method of
effectuating the combination with the Company (an "Alternative Transaction")
(including without limitation changing the provisions of this Article I) if and
to the extent they determine the change would be desirable; provided that either
of the following Alternative Transactions (so long as it satisfies the
provisions of the next-to-last sentence of this Section 1.7) shall be deemed
agreed to by the parties, and may be implemented at Parent's election (which
election shall be made as promptly as practicable after the date of this
Agreement and in any event prior to the mailing of the Joint Proxy Statement (as
defined in Section 5.3(b)) and provided that if such Alternative Transaction
would result in a Parent Change in Control Event (as defined in Section 4.8)
after giving effect to any amendments to the Parent Compensation and Benefit
Plans (as defined in Section 4.8), such Alternative Transaction shall require
the consent of the Company, which consent shall not be unreasonably withheld):
(i) a merger of the Company with and into Parent in which Parent is the
surviving corporation or (ii) a structure in which a holding company ("Holco")
would be formed, a subsidiary of Holco would merge into Parent in which merger
each stockholder of Parent would receive one share of common stock of Holco in
respect of each share of Parent Common Stock (as defined in Section 2.1(c)) held
by such stockholder immediately prior to such merger, and a separate subsidiary
of Holco would merge into the Company in which merger each shareholder of the
Company would receive cash and/or common stock of Holco in respect of each share
of common stock, par value $6.67 per share issued through 1969, par value $1.00
per share issued subsequent to 1969 of the Company (each, a "Share") held by
such shareholder immediately prior to such merger in the same amounts as are
provided for in Section 2.1(c). No Alternative Transaction (including either of
the Alternative Transactions specified in the preceding sentence) shall (x)
alter or change the amount or kind of consideration to be issued to holders of
Shares as provided herein, (y) materially delay the consummation of the
transactions contemplated hereby, or (z) cause an inability to satisfy any of
the closing conditions set forth in Article VI. The parties agree to use their
reasonable best efforts to determine promptly after the date hereof whether any
Alternative Transaction is desirable.
 
                                   ARTICLE II
 
                    EFFECT OF THE MERGER ON THE STOCK OF THE
               CONSTITUENT CORPORATIONS; EXCHANGE OF CERTIFICATES
 
     SECTION 2.1. Conversion of Securities. At the Effective Time, by virtue of
the Merger and without any action on the part of Merger Sub, the Company or the
holders of any of the following securities:
 
          (a) Each Share held in the treasury of the Company and each Share
     owned by Parent or any direct or indirect wholly owned Subsidiary (as
     defined in Section 8.11) of Parent or of the Company immediately prior to
     the Effective Time (together with the associated Company Right (as defined
     in Section 3.2; unless the context requires otherwise, all references
     herein to Shares include the associated Company Rights)) shall be canceled
     and extinguished without any conversion thereof and no payment shall be
     made with respect thereto.
 
          (b) Each issued and outstanding share of common stock, par value $.01
     per share, of Merger Sub immediately prior to the Effective Time shall be
     converted into one validly issued, fully paid and non-assessable share of
     common stock of the Surviving Corporation, and the Surviving Corporation
     shall be a wholly owned subsidiary of Parent.
 
                                       A-2
<PAGE>   131
 
          (c) Subject to the other provisions of this Section 2.1, each Share
     that is issued and outstanding immediately prior to the Effective Time
     (excluding any Shares canceled pursuant to Section 2.1(a)) shall be
     converted into either (i) the right to receive 0.6977 shares of common
     stock, par value $10.00 per share, of Parent ("Parent Common Stock"),
     together with the associated Parent Right (as defined in Section 4.2;
     unless the context otherwise requires, all references herein to Parent
     Common Stock include the associated Parent Rights) (the "Per Share Stock
     Amount"), or (ii) the right to receive $45.00 in cash, without interest
     (the "Per Share Cash Amount"), or (iii) the right to receive 0.4186 shares
     of Parent Common Stock and $18.00 in cash, without interest (the "Per Share
     Mixed Consideration") or (iv) a combination of shares of Parent Common
     Stock and cash, each as determined in accordance with Section 2.1(g),
     Section 2.1(h) or Section 2.1(i). All such Shares shall no longer be
     outstanding and shall automatically be canceled and retired and shall cease
     to exist, and each stock certificate previously evidencing Shares ("Stock
     Certificates") immediately prior to the Effective Time shall thereafter
     represent the right to receive the Per Share Stock Amount, the Per Share
     Cash Amount, the Per Share Mixed Consideration or a combination of cash and
     Parent Common Stock, each in accordance with this Article II. The holders
     of Stock Certificates shall cease to have any rights with respect to the
     Shares evidenced thereby except as otherwise provided herein or by Law (as
     defined in Section 3.6). Such Stock Certificates shall be exchanged for
     certificates evidencing whole shares of Parent Common Stock and/or cash, in
     accordance with this Article II. No fractional shares of Parent Common
     Stock shall be issued, and, in lieu thereof, a cash payment shall be made
     pursuant to Section 2.2(e).
 
          (d) If between the date of this Agreement and the Effective Time the
     outstanding shares of Parent Common Stock shall have been changed into a
     different number of shares, by reason of any stock dividend, subdivision,
     split or combination of shares, the Per Share Stock Amount and the Parent
     Common Stock component of the Per Share Mixed Consideration, or of the
     amount of Parent Common Stock determined pursuant to clause (iv) of Section
     2.1(c) shall be correspondingly adjusted to reflect such stock dividend,
     subdivision, split or combination of shares.
 
          (e) The aggregate number of Shares which may be converted into the
     right to receive cash in the Merger shall be equal to 40% of the number of
     Shares outstanding immediately prior to the Effective Time (other than
     Shares owned by Parent or any direct or indirect wholly owned Subsidiary of
     Parent or of the Company). The aggregate number of Shares which may be
     converted into the right to receive Parent Common Stock in the Merger shall
     be equal to 60% of the number of Shares outstanding immediately prior to
     the Effective Time (other than Shares owned by Parent or any direct or
     indirect wholly owned Subsidiary of Parent or of the Company).
 
          (f) Subject to the allocation and election procedures set forth in
     this Section 2.1, each record holder (or beneficial owner through
     appropriate and customary documentation and instructions) immediately prior
     to the Effective Time of Shares shall be entitled either (i) to elect to
     receive the Per Share Cash Amount for each such Share (a "Cash Election"),
     or (ii) to elect to receive the Per Share Stock Amount for each such Share
     (a "Stock Election"), or (iii) to elect to receive 60% of the Per Share
     Stock Amount and 40% of the Per Share Cash Amount for each such Share (a
     "Mixed Election") or (iv) to indicate that such record holder has no
     preference as to the receipt of cash, Parent Common Stock or a combination
     thereof with respect to such holder's Shares (a "Non-Election"). All such
     elections shall be made on a form furnished by Parent for that purpose (a
     "Form of Election") and reasonably satisfactory to the Company. If more
     than one Stock Certificate shall be surrendered for the account of the same
     holder, the number of shares of Parent Common Stock, if any, to be issued
     to such holder in exchange for the Stock Certificates which have been
     surrendered shall be computed on the basis of the aggregate number of
     Shares represented by all of the Stock Certificates surrendered for the
     account of such holder. Holders of record of Shares who hold such Shares as
     nominees, trustees or in other representative capacities (each, a
     "Representative") may submit multiple Forms of Election, provided that such
     Representative certifies that each such Form of Election covers all Shares
     held by such Representative for a particular beneficial owner.
 
          (g) If the sum of (x) the aggregate number of Shares with respect to
     which Cash Elections have been made plus (y) 40% of the aggregate number of
     Shares with respect to which Mixed Elections have
 
                                       A-3
<PAGE>   132
 
     been made exceeds the aggregate number of Shares which may be converted
     into the right to receive cash in the Merger, then:
 
             A. Each Share with respect to which a Stock Election shall have
        been made shall be converted into the right to receive the Per Share
        Stock Amount;
 
             B. Each Share with respect to which a Non-Election shall have been
        made (or deemed to have been made) shall be converted into the right to
        receive the Per Share Stock Amount;
 
             C. Each Share with respect to which a Cash Election shall have been
        made shall be converted into the right to receive:
 
                (1) the amount in cash, without interest, equal to the product
           of (i) the Per Share Cash Amount and (ii) a fraction (the "Cash
           Fraction"), the numerator of which shall be the aggregate number of
           Shares which may be converted into the right to receive cash in the
           Merger, and the denominator of which shall be the sum of (x) the
           aggregate number of Shares with respect to which Cash Elections shall
           have been made plus (y) 40% of the aggregate number of Shares with
           respect to which Mixed Elections shall have been made, and
 
                (2) the number of shares of Parent Common Stock equal to the
           product of (x) the Per Share Stock Amount and (y) a fraction equal to
           one minus the Cash Fraction; and
 
             D. Each Share with respect to which a Mixed Election shall have
        been made shall be converted into the right to receive (i) 60% of the
        Per Share Stock Amount plus (ii) 40% of the amount of cash specified in
        clause (C)(1) of this Section 2.1(g) and 40% of the number of shares of
        Parent Common Stock specified in clause (C)(2) of this Section 2.1(g).
 
          (h) If the sum of (x) the aggregate number of Shares with respect to
     which Stock Elections have been made plus (y) 60% of the aggregate number
     of Shares with respect to which Mixed Elections have been made exceeds the
     aggregate number of Shares which may be converted into the right to receive
     Parent Common Stock in the Merger, then:
 
             A. Each Share with respect to which a Cash Election shall have been
        made shall be converted into the right to receive the Per Share Cash
        Amount;
 
             B. Each Share with respect to which a Non-Election shall have been
        made (or deemed to have been made) shall be converted into the right to
        receive the Per Share Cash Amount;
 
             C. Each Share with respect to which a Stock Election shall have
        been made shall be converted into the right to receive:
 
                (1) the number of shares of Parent Common Stock equal to the
           product of (i) the Per Share Stock Amount and (ii) a fraction (the
           "Stock Fraction"), the numerator of which shall be the aggregate
           number of Shares which may be converted into the right to receive
           Parent Common Stock in the Merger, and the denominator of which shall
           be the sum of (x) the aggregate number of Shares with respect to
           which Stock Elections shall have been made plus (y) 60% of the
           aggregate number of Shares with respect to which Mixed Elections
           shall have been made, and
 
                (2) the amount in cash, without interest, equal to the product
           of (x) the Per Share Cash Amount and (y) a fraction equal to one
           minus the Stock Fraction; and
 
             D. Each Share with respect to which a Mixed Election shall have
        been made shall be converted into the right to receive (i) 40% of the
        Per Share Cash Amount plus (ii) 60% of the number of shares of Parent
        Common Stock specified in clause (C)(1) of this Section 2.1(h) and 60%
        of the amount of cash specified in clause (C)(2) of this Section 2.1(h).
 
                                       A-4
<PAGE>   133
 
          (i) In the event that neither Section 2.1(g) nor Section 2.1(h) above
     is applicable, then:
 
             A. Each Share with respect to which a Cash Election shall have been
        made shall be converted into the right to receive the Per Share Cash
        Amount;
 
             B. Each Share with respect to which a Stock Election shall have
        been made (or deemed to have been made) shall be converted into the
        right to receive the Per Share Stock Amount;
 
             C. Each Share with respect to which a Mixed Election shall have
        been made shall be converted into the right to receive 40% of the Per
        Share Cash Amount and 60% of the Per Share Stock Amount; and
 
             D. Each Share with respect to which a Non-Election shall have been
        made (or deemed to have been made), if any, shall be converted into the
        right to receive:
 
                (1) the amount in cash, without interest, equal to the product
           of (i) the Per Share Cash Amount and (ii) a fraction (the
           "Non-Election Fraction"), the numerator of which shall be the excess
           of the (A) aggregate number of Shares which may be converted into the
           right to receive cash in the Merger over (B) the sum of the aggregate
           number of Shares with respect to which a Cash Election shall have
           been made plus 40% of the aggregate number of Shares with respect to
           which Mixed Elections shall have been made, and the denominator of
           which shall be the excess of (A) the aggregate number of Shares
           outstanding immediately prior to the Effective Time (other than
           Shares owned by Parent or any direct or indirect wholly owned
           Subsidiary of Parent or of the Company) over (B) the sum of the
           aggregate number of Shares with respect to which a Cash Election, a
           Stock Election or a Mixed Election shall have been made, and
 
                (2) the number of shares of Parent Common Stock equal to the
           product of (x) the Per Share Stock Amount and (y) a fraction equal to
           one minus the Non-Election Fraction.
 
          (j) Elections shall be made by holders of Shares by delivering the
     Form of Election to The Bank of New York, or such other bank or trust
     company designated by Parent and who is reasonably satisfactory to the
     Company (the "Exchange Agent"). To be effective, a Form of Election must be
     properly completed, signed and submitted to the Exchange Agent by 5:00 p.m.
     (New York City time) on the last business day prior to the date of the
     Company Meeting (or, if applicable, the later of the Company Meeting or the
     Parent Meeting) or such other time and date as Parent and the Company may
     mutually agree (the "Election Deadline"), and accompanied by (1)(x) the
     Stock Certificates representing the Shares as to which the election is
     being made or (y) an appropriate guarantee of delivery of such Stock
     Certificates as set forth in such Form of Election from a firm which is a
     member of a registered national securities exchange or of the National
     Association of Securities Dealers, Inc. or a commercial bank or trust
     company having an office or correspondent in the United States, provided
     such Stock Certificates are in fact delivered to the Exchange Agent within
     three New York Stock Exchange ("NYSE") trading days after the date of
     execution of such guarantee of delivery (a "Guarantee of Delivery") and (2)
     a properly completed and signed Letter of Transmittal (as defined in
     Section 2.2(b)). Failure to deliver Stock Certificates covered by any
     Guarantee of Delivery within three NYSE trading days after the date of
     execution of such Guarantee of Delivery shall be deemed to invalidate any
     otherwise properly made Cash Election, Stock Election or Mixed Election.
     Parent will have the discretion, which it may delegate in whole or in part
     to the Exchange Agent, to determine whether Forms of Election have been
     properly completed, signed and submitted or revoked and to disregard
     immaterial defects in Forms of Election. The good faith decision of Parent
     (or the Exchange Agent) in such matters shall be conclusive and binding.
     Neither Parent nor the Exchange Agent will be under any obligation to
     notify any person of any defect in a Form of Election submitted to the
     Exchange Agent. The Exchange Agent shall also make all computations
     contemplated by this Section 2.1 and all such computations shall be
     conclusive and binding on the holders of Shares in the absence of manifest
     error. Any Form of Election may be changed or revoked prior to the Election
     Deadline. In the event a Form of Election is revoked prior to the Election
     Deadline, Parent shall, or shall cause the Exchange Agent to, cause the
     Stock Certificates representing
 
                                       A-5
<PAGE>   134
 
     the Shares covered by such Form of Election to be promptly returned without
     charge to the person submitting the Form of Election upon written request
     to that effect from such person.
 
          (k) For the purposes hereof, a holder of Shares who does not submit a
     Form of Election which is received by the Exchange Agent prior to the
     Election Deadline (including a holder who submits and then revokes his or
     her Form of Election and does not resubmit a Form of Election which is
     timely received by the Exchange Agent), or who submits a Form of Election
     without the corresponding Stock Certificates or a Guarantee of Delivery,
     shall be deemed to have made a Non-Election. If any Form of Election is
     defective in any manner that the Exchange Agent cannot reasonably determine
     the election preference of the shareholder submitting such Form of
     Election, the purported Cash Election, Stock Election or Mixed Election set
     forth therein shall be deemed to be of no force and effect and the
     shareholder making such purported Cash Election, Stock Election or Mixed
     Election shall, for purposes hereof, be deemed to have made a Non-Election.
 
          (l) A Form of Election and a Letter of Transmittal shall be included
     with each copy of the Joint Proxy Statement (as defined in Section 5.3)
     mailed to shareholders of the Company in connection with the Company
     Meeting (as defined in Section 5.3). Parent and the Company shall each use
     its reasonable best efforts to mail or otherwise make available the Form of
     Election and a Letter of Transmittal to all persons who become holders of
     Shares during the period between the record date for the Company Meeting
     and the Election Deadline.
 
     SECTION 2.2. Exchange of Certificates. (a) At or prior to the Effective
Time, Parent shall deposit, or shall cause to be deposited, with the Exchange
Agent for the benefit of the holders of Shares for exchange in accordance with
this Article II, through the Exchange Agent, (i) certificates evidencing such
number of shares of Parent Common Stock equal to (x) the Per Share Stock Amount
multiplied by (y) the aggregate number of Shares which may be converted into the
right to receive Parent Common Stock in the Merger, and (ii) (1) cash in an
amount equal to (x) the Per Share Cash Amount multiplied by (y) the aggregate
number of Shares which may be converted into the right to receive cash in the
Merger, and (2) any cash necessary to pay amounts due pursuant to Section 2.2(e)
(such certificates for shares of Parent Common Stock and such cash being
hereinafter referred to as the "Exchange Fund"). The Exchange Agent shall,
pursuant to irrevocable instructions in accordance with this Article II, deliver
the Parent Common Stock and cash contemplated to be issued pursuant to Section
2.1 out of the Exchange Fund. The Exchange Fund shall not be used for any other
purpose. The Exchange Agent shall invest any cash included in the Exchange Fund,
as directed by Parent, on a daily basis. Any interest and other income resulting
from such investments shall be paid to Parent.
 
     (b) Parent will instruct the Exchange Agent to mail to each holder of
record of Stock Certificates who has not previously surrendered his or her Stock
Certificates with a validly executed Form of Election and Letter of Transmittal
as soon as reasonably practicable after the Effective Time, (i) a letter of
transmittal (which shall specify that delivery shall be effected, and risk of
loss and title to such holder's Stock Certificates shall pass, only upon proper
delivery of the Stock Certificates to the Exchange Agent and shall be in such
form and have such other provisions as Parent may reasonably specify) and (ii)
instructions for use in effecting the surrender of the Stock Certificates in
exchange for certificates evidencing shares of Parent Common Stock and/or cash
(collectively, the "Letter of Transmittal").
 
     (c) Upon the later of the Effective Time and the surrender of a Stock
Certificate for cancellation (or the affidavits and indemnification regarding
the loss or destruction of such certificates reasonably acceptable to Parent) to
the Exchange Agent together with the Letter of Transmittal, duly executed, and
such other customary documents as may be required pursuant thereto, the holder
of such Stock Certificate shall be entitled to receive in exchange therefor, and
the Exchange Agent shall deliver in accordance with the Letter of Transmittal:
(A) certificates evidencing that number of whole shares of Parent Common Stock
or cash, or a combination thereof, which such holder has the right to receive in
respect of the Shares formerly evidenced by such Stock Certificate in accordance
with Section 2.1 and (B) cash in lieu of fractional shares of Parent Common
Stock to which such holder is entitled pursuant to Section 2.2(e) (the shares of
Parent Common Stock and cash described in clause (A) being collectively referred
to as the "Merger Consideration"), and the
 
                                       A-6
<PAGE>   135
 
Stock Certificate so surrendered shall forthwith be canceled. In the event of a
transfer of ownership of Shares which is not registered in the transfer records
of the Company, a certificate evidencing the proper number of shares of Parent
Common Stock and/or cash may be issued and/or paid in accordance with this
Article II to a transferee if the Stock Certificate evidencing such Shares is
presented to the Exchange Agent, accompanied by all documents required to
evidence and effect such transfer and by evidence that any applicable stock
transfer taxes have been paid. Until surrendered as contemplated by Section
2.1(j) or this Section 2.2, each Stock Certificate shall be deemed at any time
after the Effective Time to evidence only the right to receive upon such
surrender the Merger Consideration together with any dividends or other
distributions paid on shares of Parent Common Stock after the Effective Time.
 
     (d) All shares of Parent Common Stock issued and cash paid upon the
surrender for exchange of Stock Certificates in accordance with the terms of
this Article II shall be deemed to have been issued and paid, respectively, in
full satisfaction of all rights pertaining to the Shares theretofore represented
by such Stock Certificates.
 
     (e) (i) No certificates or scrip evidencing fractional shares of Parent
Common Stock shall be issued upon the surrender for exchange of Stock
Certificates, and such fractional share interests will not entitle the owner
thereof to vote or to any rights of a stockholder of Parent. In lieu of any such
fractional shares, each holder of Shares upon surrender of a Stock Certificate
for exchange pursuant to this Section 2.2 shall be paid an amount in cash
(without interest), rounded to the nearest cent, determined by multiplying (x)
the per share closing price on the NYSE of Parent Common Stock on the trading
day immediately prior to the Effective Time by (y) the fractional interest to
which such holder would otherwise be entitled (after taking into account all
Shares then held of record by such holder).
 
     (ii) As soon as practicable after the determination of the amount of cash,
if any, to be paid to holders of Shares with respect to any fractional share
interests, the Exchange Agent shall promptly pay such amounts to such holders of
Shares subject to and in accordance with the terms of Section 2.2(c). Any
payment received by a holder of Shares with respect to fractional share
interests is merely intended to provide a mechanical rounding off of, and is not
separately bargained for, consideration. If more than one Stock Certificate
shall be surrendered for the account of the same holder, the number of shares of
Parent Common Stock to be issued to such holder in exchange for the Stock
Certificates which have been surrendered shall be computed on the basis of the
aggregate number of shares represented by all of the Stock Certificates
surrendered for the account of such holder.
 
     (f) Any portion of the Exchange Fund which remains undistributed to the
holders of the Stock Certificates for six months after the Effective Time shall
be delivered to Parent, upon demand, and any holders of Stock Certificates who
have not theretofore complied with this Article II shall thereafter look only to
Parent for payment of their claim for the Merger Consideration and any cash in
lieu of fractional shares of Parent Common Stock.
 
     (g) None of Parent, the Company, Merger Sub or the Exchange Agent shall be
liable to any person in respect of any shares of Parent Common Stock or cash
from the Exchange Fund in each case delivered to a public official pursuant to
any applicable abandoned property, escheat or similar law. If any Stock
Certificate shall not have been surrendered prior to seven years after the
Effective Time (or immediately prior to such earlier date on which any Merger
Consideration and any cash payable to the holder of such Stock Certificate
pursuant to Section 2.2(e) would otherwise escheat to or become the property of
any governmental body or authority), any such Merger Consideration and any cash
in lieu of fractional shares of Parent Common Stock shall, to the extent
permitted by applicable Law, become the property of the Surviving Corporation,
free and clear of all claims or interest of any person previously entitled
thereto.
 
     (h) Parent and Merger Sub shall be entitled to deduct and withhold from the
consideration otherwise payable pursuant to this Agreement to any holder of
Shares such amounts as Parent or Merger Sub is required to deduct and withhold
with respect to the making of such payment under the Code or any provision of
state, local or foreign tax law. To the extent that amounts are so withheld by
Parent or Merger Sub, such withheld amounts shall be treated for all purposes of
this Agreement as having been paid to the holder of the Shares in respect of
which such deduction and withholding was made by Parent or Merger Sub.
 
                                       A-7
<PAGE>   136
 
     (i) If any Stock Certificate shall have been lost, stolen or destroyed,
upon the making of an affidavit of that fact by the person claiming such Stock
Certificate to be lost, stolen or destroyed and, if required by the Surviving
Corporation, the posting by such person of a bond in such reasonable amount as
the Surviving Corporation may direct as indemnity against any claim that may be
made against it with respect to such Stock Certificate, the Exchange Agent will
issue in exchange for such lost, stolen or destroyed Stock Certificate the
Merger Consideration and any cash in lieu of fractional shares, pursuant to this
Article II.
 
     (j) In the event this Agreement is terminated without the occurrence of the
Effective Time, Parent shall, or shall cause the Exchange Agent to, return
promptly any Stock Certificates theretofore submitted or delivered to Parent or
the Exchange Agent without charge to the person who submitted such Stock
Certificates.
 
     SECTION 2.3. Stock Transfer Books. There shall be no further registration
of transfers on the stock transfer books of the Surviving Corporation of the
Shares which were outstanding immediately prior to the Effective Time. If, after
the Effective Time, Stock Certificates are presented to the Surviving
Corporation or the Exchange Agent for any reason, they shall be canceled and
exchanged as provided in this Article II, except as otherwise provided by Law.
 
     SECTION 2.4. Company Options and Restricted Shares. (a) Immediately prior
to the Effective Time, all outstanding Company Options (as defined in Section
3.2), whether or not vested or exercisable, shall be canceled and, in lieu
thereof, immediately prior to the Effective Time, the holders thereof shall
receive a cash payment from the Company equal to the product of (i) the total
number of Shares previously subject to such Company Options, whether or not
vested or exercisable, and (ii) the excess of the Per Share Cash Amount over the
exercise price per Share subject to such Company Options, subject to any
required withholding of taxes.
 
     (b) Immediately prior to the Effective Time, Restricted Shares (as defined
in Section 3.2) that, but for the effect on such Restricted Shares of the
Company Shareholder Approval (as defined in Section 3.18), would be unvested as
of the Effective Time ("Unvested Restricted Shares"), shall be canceled and, in
lieu thereof, immediately prior to the Effective Time, each holder of an
Unvested Restricted Shares shall receive a cash payment from the Company equal
to the product of (i) the Per Share Cash Amount and (ii) the number of Unvested
Restricted Shares held by such holder immediately prior to the Effective Time,
subject to any required withholding of taxes.
 
     (c) Prior to the Effective Time, the Company shall (i) use its reasonable
best efforts to obtain any consents from holders of Company Options and
Restricted Shares to the cancellation thereof in exchange for the payment
provided for in Section 2.4(a) or (b) in the form reasonably agreed upon by
Parent and the Company as promptly as practicable after the date of this
Agreement and (ii) make any amendments to the terms of the Company Plans (as
defined in Section 3.2) that are necessary to give effect to the transactions
contemplated by Sections 2.4(a) and (b). Notwithstanding any other provision of
this Section 2.4, payment may be withheld in respect of any Company Option or
Restricted Shares (if applicable) until any such consents are obtained.
 
     SECTION 2.5. Appraisal Rights. In accordance with Section 910 of the NYBCL,
no appraisal rights shall be available to holders of Shares in connection with
the Merger.
 
                                  ARTICLE III
 
                 REPRESENTATIONS AND WARRANTIES OF THE COMPANY
 
     The Company represents and warrants to Parent and Merger Sub that except as
set forth in the corresponding sections or subsections of the Disclosure Letter
delivered to Parent by the Company concurrently with entering into this
Agreement (the "Company Disclosure Letter"):
 
     SECTION 3.1. Organization, Qualification, Etc. (a) The Company is a
corporation duly organized, validly existing and in good standing under the Laws
of the jurisdiction of its incorporation and has the corporate power and
authority to own its assets and to carry on its business as it is now being
conducted, and is
 
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<PAGE>   137
 
duly qualified to do business and is in good standing in each jurisdiction in
which the ownership of its assets or the conduct of its business requires such
qualification, except for jurisdictions in which such failure to be so qualified
or to be in good standing does not, individually or in the aggregate, have a
Material Adverse Effect on the Company (as hereinafter defined). As used in this
Agreement, any reference to any state of facts, event, change or effect having a
"Material Adverse Effect" on or with respect to the "Company" or "Parent," as
the case may be, means such state of facts, event, change or effect that (i) has
had, or would reasonably be expected to have, a material adverse effect on the
business, results of operations or financial condition of the Company and its
Subsidiaries, taken as a whole, or Parent and its Subsidiaries, taken as a
whole, as the case may be, or (ii) would reasonably be expected to prevent or
substantially delay consummation of the transactions contemplated by this
Agreement. The copies of the Company's certificate of incorporation and bylaws
filed or incorporated by reference in the Company's Annual Report on Form 10-K
for the year ended December 31, 1997 (the "Company's 1997 Form 10-K") are
complete and correct and in full force and effect on the date hereof.
 
     (b) Each of the Company's Subsidiaries is an entity duly organized, validly
existing and in good standing (where applicable) under the Laws of its
jurisdiction of incorporation or organization, has the corporate power and
authority to own its assets and to carry on its business as it is now being
conducted, and is duly qualified to do business and is in good standing in each
jurisdiction in which the ownership of its assets or the conduct of its business
requires such qualification, except where the failure to be so organized,
existing, qualified or in good standing does not, individually or in the
aggregate, have a Material Adverse Effect on the Company. All the outstanding
shares of capital stock of, or other ownership interests in, the Company's
Significant Subsidiaries (as such term is defined in Rule 1-02 of Regulation S-X
of the Securities and Exchange Commission (the "SEC") (each such Subsidiary, a
"Significant Subsidiary")) are validly issued, fully paid and non-assessable
and, other than directors' qualifying shares, are owned by the Company, directly
or indirectly, free and clear of all liens, claims, charges or encumbrances
("Encumbrances"), except for Encumbrances which individually or in the aggregate
do not have a Material Adverse Effect on the Company. There are no existing
options, rights of first refusal, conversion rights, preemptive rights, calls,
commitments, arrangements or obligations of any character ("Share Arrangements")
relating to the issued or unissued capital stock or other securities of, or
other ownership interests in, any Significant Subsidiary of the Company, other
than directors' qualifying shares. None of the certificates of incorporation or
bylaws or other organizational documents of any of the Company's Significant
Subsidiaries purport to grant rights to any person other than (1) customary
rights given to all shareholders pro rata in accordance with their holdings and
(2) customary rights with respect to corporate governance (including rights to
notices) and rights of indemnification of directors and officers. The Company
has delivered to Parent complete and correct copies of the certificate of
incorporation and bylaws or other organizational documents of each of the
Company's Significant Subsidiaries which is not wholly owned by the Company
and/or another of its wholly owned Subsidiaries (ignoring for this purpose
directors' qualifying shares).
 
     A complete listing of the Company's Subsidiaries is set forth in Section
3.1(b) of the Company Disclosure Letter. Except for the Company's Subsidiaries
listed in Section 3.1(b) of the Company Disclosure Letter, the Company does not
directly or indirectly own any equity or similar interest in, or any interest
convertible into or exchangeable or exercisable for any equity or similar
interest in, any corporation, partnership, joint venture or other business
association or entity that directly or indirectly conducts any activity which is
material to the Company and its Subsidiaries taken as a whole.
 
     SECTION 3.2. Capital Stock. (a) The authorized stock of the Company
consists of 150,000,000 Shares and 10,000,000 shares of preferred stock, par
value $1.00 per share (the "Company Preferred Stock"). As of July 13, 1998,
43,703,528 Shares and no shares of the Company Preferred Stock were issued and
outstanding and 21,366,682 Shares were held in treasury. All of the outstanding
Shares have been validly issued and are fully paid and non-assessable. As of
July 13, 1998, there were no outstanding Share Arrangements to which
 
                                       A-9
<PAGE>   138
 
the Company is a party relating to the issued or unissued capital stock or other
securities of, or other ownership interests in, the Company, other than:
 
          (i) rights ("Company Rights") to acquire shares of the Company
     Preferred Stock pursuant to the Rights Agreement, dated as of February 1,
     1996, between the Company and First Chicago Trust Company of New York, as
     Rights Agent (the "Company Rights Agreement");
 
          (ii) options to purchase 2,633,419 Shares granted on or prior to the
     date hereof pursuant to the Company's 1985 Stock Option Plan, 1989 Stock
     Option and Incentive Plan, 1992 Stock Incentive Plan, 1996 Stock Option
     Plan and the 1997 Non-Employee Directors' Stock Option Plan (such plans
     being referred to collectively as the "Company Plans", and options that
     have been or may be issued under any of the Company Plans being referred to
     collectively as the "Company Options");
 
          (iii) warrants ("Company Warrants") to purchase an aggregate of 1,452
     Shares at $34.83 per Share issued pursuant to the Warrant Agreement, dated
     as of March 1, 1990, as amended by Amendment No. 1, dated as of January 8,
     1995, between Data Switch Corporation and First Chicago Trust Company of
     New York, as successor Warrant Agent; and
 
          (iv) 160,122 restricted Shares granted on or prior to the date hereof
     pursuant to one or more of the Company Plans ("Restricted Shares").
 
     (b) Since July 13, 1998, there have been no increases to any of the amounts
set forth in Section 3.2(a), other than by reason of issuances of Shares upon
exercise of any of the Company Options or Company Warrants enumerated in clauses
(ii) and (iii) of Section 3.2(a) which events have reduced the applicable number
in clauses (ii) through (iv) of Section 3.2(a) by a corresponding amount, nor
has the Company modified, amended or entered into new Share Arrangements.
 
     SECTION 3.3. Corporate Authority; No Violation. (a) The Company has the
corporate power and authority to enter into this Agreement and to carry out its
obligations hereunder. The execution and delivery of this Agreement and the
performance by the Company of its obligations hereunder have been duly and
validly authorized by the Board of Directors of the Company and, except for the
approval of its shareholders of this Agreement, no other corporate proceedings
on the part of the Company are necessary to authorize this Agreement or the
transactions contemplated hereby. The Board of Directors of the Company, at a
meeting duly called and held at which a quorum was present throughout, has
unanimously determined that the transactions contemplated by this Agreement are
in the best interest of the Company and its shareholders and to recommend to
such shareholders that they vote in favor of this Agreement and the Merger (the
"Company Board Recommendation"). This Agreement has been duly and validly
executed and delivered by the Company and, assuming this Agreement constitutes a
valid and binding agreement of the other parties hereto, constitutes a valid and
binding agreement of the Company, enforceable against the Company in accordance
with its terms (except insofar as enforceability may be limited by applicable
bankruptcy, insolvency, reorganization, moratorium or similar Laws affecting
creditors' rights generally, or by principles governing the availability of
equitable remedies).
 
     (b) The execution, delivery and performance of this Agreement by the
Company do not, and the consummation by the Company of the Merger and the other
transactions contemplated hereby will not, constitute or result in (i) a breach
or violation of, or a default under, or the creation of any rights in favor of
any party under, the certificate of incorporation or bylaws of the Company or
the comparable governing instruments of any of its Subsidiaries, (ii) a breach
or violation of, or a default under, or an acceleration of any obligations
under, or the creation of a lien, pledge, security interest or other encumbrance
on the assets of the Company or any of its Subsidiaries (with or without notice,
lapse of time or both) pursuant to, any agreement, lease, contract, note,
mortgage, indenture, arrangement, nongovernmental permit or license, order,
decree, or other obligation ("Contracts") binding upon the Company or any of its
Subsidiaries ("Company Contracts") or (provided, as to consummation, the filings
and notices are made, and approvals are obtained, as referred to in Section
3.3(c)) any applicable Law or Decree (as defined in Section 3.6) or governmental
permit or license to which the Company or any of its Subsidiaries is subject, or
(iii) any change in the rights or obligations of
 
                                      A-10
<PAGE>   139
 
any party under any of the Company Contracts, except for any breach, violation,
default, acceleration, creation or change that does not, individually or in the
aggregate, have a Material Adverse Effect on the Company.
 
     (c) Other than in connection with or in compliance with the provisions of
the Securities Act of 1933, as amended, and the rules and regulations
promulgated thereunder (the "Securities Act"), the Securities Exchange Act of
1934, as amended, and the rules and regulations promulgated thereunder (the
"Exchange Act"), the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as
amended, and the rules and regulations promulgated thereunder (the "HSR Act"),
and the securities or blue sky Laws of the various states and other than the
filing of the Delaware Certificate of Merger with the Delaware Secretary of
State and the New York Certificate of Merger with the New York Department of
State, no authorization, consent or approval of, or filing with, any
governmental, administrative or regulatory body or authority ("Governmental
Entity") is necessary for the consummation by the Company of the transactions
contemplated by this Agreement, except for such authorizations, consents,
approvals or filings that, if not obtained or made, would not, individually or
in the aggregate, have a Material Adverse Effect on the Company.
 
     SECTION 3.4. Reports and Financial Statements. The Company has timely filed
with the SEC all forms, reports, schedules, statements and other documents
required to be filed by it since December 31, 1995 under the Securities Act or
the Exchange Act (such documents, as supplemented or amended since the time of
filing, the "Company SEC Reports"). As of their respective dates, the Company
SEC Reports, including without limitation, any financial statements or schedules
included or incorporated by reference therein, at the time filed (and, in the
case of registration statements and proxy statements, on the dates of
effectiveness and the dates of mailing, respectively) (i) complied in all
material respects with the applicable requirements of the Securities Act and the
Exchange Act, and (ii) did not contain any untrue statement of a material fact
or omit to state a material fact required to be stated therein or necessary to
make the statements therein, in light of the circumstances under which they were
made, not misleading. The audited consolidated financial statements and
unaudited consolidated interim financial statements included or incorporated by
reference in the Company SEC Reports (including any related notes and schedules)
fairly present, in all material respects, the financial position of the Company
and its consolidated Subsidiaries as of the dates thereof and the results of
their operations and their cash flows for the periods set forth therein, in each
case in accordance with past practice and generally accepted accounting
principles in the United States ("GAAP") consistently applied during the periods
involved (except as otherwise disclosed in the notes thereto and subject, where
appropriate, to normal year-end adjustments that would not be material in amount
or effect).
 
     SECTION 3.5. No Undisclosed Liabilities. Neither the Company nor any of its
Subsidiaries has any liabilities or obligations of any nature, whether or not
accrued, contingent or otherwise, except (a) liabilities or obligations
disclosed or reserved against in the unaudited consolidated interim financial
statements of the Company as of and for the three months ended March 31, 1998
included in the Company SEC Reports or disclosed in the footnotes thereto or in
the footnotes to the audited consolidated financial statements of the Company as
of and for the fiscal year ended December 31, 1997 included in the Company SEC
Reports or otherwise disclosed in the Company's 1997 Form 10-K or in the
Company's Quarterly Report on Form 10-Q for the quarter ended March 31, 1998,
and (b) liabilities or obligations which do not, individually or in the
aggregate, have a Material Adverse Effect on the Company.
 
     SECTION 3.6. Compliance with Laws. The Company and each of its Subsidiaries
each:
 
          (a) in the conduct of its businesses, is in compliance with all
     federal, state, local and foreign statutes and laws, and all regulations,
     ordinances and rules promulgated thereunder (collectively, "Laws"), and all
     judgments, orders, rulings, injunctions or decrees of Governmental Entities
     (collectively, "Decrees"), applicable thereto or to the employees
     conducting such businesses;
 
          (b) has all permits, licenses, authorizations, orders and approvals
     of, and have made all filings, applications and registrations with, all
     Governmental Entities that are required in order to permit it to conduct
     its businesses substantially as presently conducted; all such permits,
     licenses, authorizations, orders and approvals are in full force and effect
     and, to the best of the Company's knowledge, no suspension or cancellation
     of any of them is threatened; and
 
                                      A-11
<PAGE>   140
 
          (c) has received, since December 31, 1995, no notification or
     communication from any Governmental Entity (i) asserting that it is not in
     compliance with any of the Laws or Decrees which such Governmental Entity
     enforces or (ii) threatening to revoke any permit, license, authorization,
     order or approval;
 
except where the failure of any of the foregoing to be true does not,
individually or in the aggregate, have a Material Adverse Effect on the Company.
 
     SECTION 3.7. Environmental Laws. (a) To the Company's knowledge, neither
the Company nor any of its Subsidiaries is the subject of any pending or
threatened actions, causes of action, claims, investigations, or proceedings
("Litigation") (whether civil, criminal, administrative or arbitral) by any
Governmental Entity or other person alleging liability or damages under or
non-compliance with any Environmental Law (as defined below) which, individually
or in the aggregate, has a Material Adverse Effect on the Company; (b) neither
the conduct nor the operation of the Company or its Subsidiaries violates or has
in the past violated any applicable Environmental Law or applicable
Environmental Decree (as defined below) except as does not, individually or in
the aggregate, have a Material Adverse Effect on the Company; and (c) to the
knowledge of the Company, there is not now on, in or under any property owned,
leased or operated by the Company or any of its Subsidiaries any of the
following: (1) underground storage tanks or surface impoundments, (2)
asbestos-containing materials, (3) polychlorinated biphenyls, or (4) other
"Hazardous Substances" (as such term is defined under the Comprehensive
Environmental, Response, Compensation and Liability Act of 1980, 42 U.S.C. ss.
9601, et seq., as amended as of the date hereof) ("Hazardous Substances") or
petroleum products, in each case which would reasonably be expected to form the
basis of liability or other obligation of the Company or any of its Subsidiaries
under any applicable Environmental Laws, except for such liabilities or
obligations which do not, individually or in the aggregate, have a Material
Adverse Effect on the Company. As used herein, the term "Environmental Laws"
means any Laws, and the term "Environmental Decrees" means any Decrees, in each
case, relating to pollution or protection of the environment (including, without
limitation, ambient air, surface water, ground water, land surface or subsurface
strata), natural resources or occupational health and safety (including, without
limitation, those relating to the use, storage, treatment, disposal or transport
of Hazardous Substances, petroleum products, pollutants, contaminants or solid
or hazardous wastes or odors).
 
     SECTION 3.8. Employee Benefit Plans. (a) Section 3.8 of the Company
Disclosure Schedule contains a complete list of all material written bonus,
vacation, deferred compensation, pension, retirement, profit-sharing, thrift,
savings, employee stock ownership, stock bonus, stock purchase, restricted stock
and stock option plans, employment or severance contracts, medical, dental,
disability, health and life insurance plans, and other employee benefit and
fringe benefit plans or other Contracts maintained or contributed to by the
Company or any of its Subsidiaries for the benefit of officers, former officers,
employees, former employees, directors, former directors, or the beneficiaries
of any of the foregoing, or pursuant to which the Company or any of its
Subsidiaries may have any liability (collectively (whether or not material), the
"Company Compensation and Benefit Plans") that are Contracts with, or plans
maintained primarily for the benefit of, individuals employed or rendering
services in the United States and are not multiemployer plans within the meaning
of Section 4001(a)(3) of ERISA (as defined in Section 3.8(c)) (the "U.S. Company
Compensation and Benefit Plans").
 
     (b) The Company has used its reasonable best efforts to have provided or
made available to Parent copies of all Company Compensation and Benefit Plans
listed on Section 3.8 of the Company Disclosure Schedule (excluding, however,
multiemployer plans within the meaning of Section 4001(a)(3) of ERISA
("Multiemployer Plans") and Company Compensation and Benefit Plans which have
been filed with or incorporated by reference into the Company's 1997 Form 10-K),
including, but not limited to, all amendments thereto, and all of such copies
that have been delivered are true and correct.
 
     (c) Each of the Company Compensation and Benefit Plans has been and is
being administered in accordance with the terms thereof and all applicable Law
except where the failure to do so does not, individually or in the aggregate,
have a Material Adverse Effect on the Company. Each "employee pension benefit
plan" within the meaning of Section 3(2) of the Employee Retirement Income
Security Act of 1974,
 
                                      A-12
<PAGE>   141
 
as amended ("ERISA") (each such plan, a "Pension Plan") included in the U.S.
Company Compensation and Benefit Plans (a "Company Pension Plan") which is
intended to be qualified under Section 401(a) of the Code has received a
favorable determination letter from the Internal Revenue Service, and the
Company is not aware of any circumstances which could result in the revocation
or denial of any such favorable determination letter. To the Company's
knowledge, no material "prohibited transaction," within the meaning of Section
4975 of the Code or Section 406 of ERISA, has occurred with respect to any U.S.
Company Compensation and Benefit Plan. There is no pending or, to the Company's
knowledge, threatened Litigation relating to any of the Company Compensation and
Benefit Plans which, individually or in the aggregate, has a Material Adverse
Effect on the Company.
 
     (d) No material liability under Title IV of ERISA has been or is reasonably
expected to be incurred by the Company or any of its Subsidiaries or any entity
which is considered one employer with the Company under Section 4001(a)(15) of
ERISA or Section 414 of the Code (any such entity, a "Company ERISA Affiliate"),
other than such liabilities that have previously been satisfied. No notice of a
"reportable event," within the meaning of Section 4043 of ERISA, for which the
30-day reporting requirement has not been waived has been required to be filed
for any Company Pension Plan or by any Company ERISA Affiliate within the past
12 months.
 
     (e) All contributions, premiums and payments required to be made under the
terms of any Company Compensation and Benefit Plan have been made, except where
the failure to do so does not, individually or in the aggregate, have a Material
Adverse Effect on the Company. Neither any Company Pension Plan nor any
single-employer plan of a Company ERISA Affiliate has an "accumulated funding
deficiency" (whether or not waived) within the meaning of Section 412 of the
Code or Section 302 of ERISA. Neither the Company nor any of its Subsidiaries
has provided, or is required to provide, security to any Company Pension Plan or
to any single-employer plan of a Company ERISA Affiliate pursuant to Section
401(a)(29) of the Code.
 
     (f) Under each Company Pension Plan which is a defined benefit plan, as of
the last day of the most recent plan year ended prior to the date hereof, the
actuarially determined present value of all "benefit liabilities", within the
meaning of Section 4001(a)(16) of ERISA (as determined on the basis of the
actuarial assumptions contained in such Company Pension Plan's most recent
actuarial valuation) did not exceed the then current value of the assets of such
Company Pension Plan, and there has been no adverse change in the financial
condition of such Company Pension Plan (with respect to either assets or
benefits) since the last day of the most recent plan year.
 
     (g) Neither the Company nor any of its Subsidiaries contributes to or is
required to contribute to any Multiemployer Plan. Neither the Company nor any of
its Subsidiaries has incurred any material withdrawal liability (within the
meaning of Section 4201 of ERISA) under any Multiemployer Plan within the past 5
years that has not been satisfied, nor could any such material withdrawal
liability reasonably be expected to be incurred.
 
     (h) Except as set forth in the Company Compensation and Benefit Plans
listed in Section 3.8 of the Company Disclosure Schedule or filed with or
incorporated by reference into the Company's 1997 Form 10-K, the execution of,
and performance of the transactions contemplated in, this Agreement will not
(either alone or upon the occurrence of any additional or subsequent events) (i)
constitute an event under any Company Compensation and Benefit Plan, trust or
loan that will or may result in any payment (whether of severance pay or
otherwise), acceleration, forgiveness of indebtedness, vesting, distribution,
increase in benefits or obligation to fund benefits with respect to any officers
and directors of the Company or (ii) result in any payment or benefit that will
or may be made by the Company, any of its Subsidiaries, Parent or any of their
respective affiliates that will be characterized as an "excess parachute
payment," within the meaning of Section 280G(b)(1) of the Code.
 
     (i) The contributions of the Company and any of its Subsidiaries to any
trust described in Section 501(c)(9) of the Code have complied with Section 419A
of the Code.
 
     SECTION 3.9. Absence of Certain Changes or Events. Since December 31, 1997
the businesses of the Company and its Subsidiaries have been conducted in all
material respects in the ordinary course consistent
 
                                      A-13
<PAGE>   142
 
with past practice, the Company and its Subsidiaries have not engaged in any
transaction or series of related transactions material to the Company and its
Subsidiaries taken as a whole other than in the ordinary course consistent with
past practice, and there has not been any event, occurrence or development,
alone or taken together with all other existing facts, that, individually or in
the aggregate, has a Material Adverse Effect on the Company.
 
     SECTION 3.10. Litigation. There is no Litigation pending (or, to the
Company's knowledge, threatened) against the Company or any of its Subsidiaries
or any of their respective properties which, individually or in the aggregate,
has a Material Adverse Effect on the Company. The Company is not subject to any
Decree that, individually or in the aggregate, has a Material Adverse Effect on
the Company.
 
     SECTION 3.11. Material Contracts. All of the Company Contracts that are
required to be described in the Company SEC Reports or to be filed as exhibits
thereto are described in the Company SEC Reports or filed as exhibits thereto.
Neither the Company nor any of its Subsidiaries nor any other party is in breach
of or in default under any Company Contract except for such breaches and
defaults which do not, individually or in the aggregate, have a Material Adverse
Effect on the Company.
 
     SECTION 3.12. Labor Matters. As of the date of this Agreement, the Company
and its U.S. Subsidiaries (as defined in Section 8.11) do not have any
collective bargaining agreements with any persons employed by the Company or any
of its U.S. Subsidiaries or any persons otherwise performing services primarily
for the Company or any of its U.S. Subsidiaries, nor is the Company or any of
its U.S. Subsidiaries in the process of negotiating any such agreement. There is
no labor strike, dispute or stoppage pending or, to the knowledge of the
Company, threatened against the Company or any of its Subsidiaries which,
individually or in the aggregate, has a Material Adverse Effect on the Company.
None of the Company or its Subsidiaries is the subject to a proceeding asserting
that it has committed an unfair labor practice (within the meaning of the
National Labor Relations Act) or seeking to compel it to bargain with any labor
organization as to wages and conditions of employment which proceeding,
individually or in the aggregate, has a Material Adverse Effect on the Company.
As of the date of this Agreement there are, to the knowledge of the Company, no
organizational efforts currently being made involving any of the employees of
the Company or any of its Subsidiaries.
 
     SECTION 3.13. Tax Matters. (a) The Company and each of its Subsidiaries
have (i) filed all federal, state, local and foreign Tax Returns (as defined
below) required to be filed by them (taking into account extensions), (ii) paid
or accrued all Taxes (as defined below) shown to be due on such Returns or which
are otherwise due and payable and (iii) paid or accrued all Taxes for which a
notice of assessment or collection has been received, except in the case of
clause (i), (ii) or (iii) for any such filings, payments or accruals which do
not, individually or in the aggregate, have a Material Adverse Effect on the
Company. Neither the Internal Revenue Service nor any other taxing authority has
asserted in writing any claim for Taxes, or to the knowledge of the Company, is
threatening to assert any claims for Taxes, against the Company or any of its
Subsidiaries which claims, if determined adversely to the Company or such
Subsidiary, would, individually or in the aggregate, have a Material Adverse
Effect on the Company. The Company and each of its Subsidiaries have withheld or
collected and paid over to the appropriate Governmental Entities (or are
properly holding for such payment) all Taxes required by Law to be withheld or
collected, except for amounts which do not, individually or in the aggregate,
have a Material Adverse Effect on the Company. There are no outstanding
agreements or waivers extending the statutory period of limitation applicable to
any material Tax Return of the Company or any of its Subsidiaries. Neither the
Company nor any of its Subsidiaries has made an election under Section 341(f) of
the Code. There are no liens for Taxes upon the assets of the Company or any of
its Subsidiaries (other than liens for Taxes that are not yet due), except for
liens which do not, individually or in the aggregate, have a Material Adverse
Effect on the Company. Neither the Company nor any of its Subsidiaries (i) has
any liability under Treasury Regulation Section 1.1502-6 or analogous state,
local, or foreign law provision, except to the extent any such liabilities,
individually or in the aggregate, do not have a Material Adverse Effect on the
Company, or (ii) is a party to a Tax sharing or Tax indemnity agreement or any
other agreement of a similar nature with any entity other than the Company or
any of its Subsidiaries that remains in effect and under which the Company or
any such Subsidiary could have any material liability for Taxes. No claim has
been made in writing by a taxing authority in a jurisdiction where the Company
or any of its Subsidiaries does not file Tax Returns that the Company or any of
its Subsidiaries is or may be subject to
                                      A-14
<PAGE>   143
 
taxation by that jurisdiction where such claim, if determined adversely to the
Company or such Subsidiary, would, individually or in the aggregate, have a
Material Adverse Effect on the Company. Neither the Company nor any of its
Subsidiaries is the subject of any currently ongoing audit or examination with
respect to a material amount of Taxes, nor, to the knowledge of the Company, has
any such audit been threatened or proposed, by any taxing authority.
 
     (b) The Company does not know of any fact with respect to the Company and
its Subsidiaries that could reasonably be expected to prevent the Merger from
qualifying as a reorganization within the meaning of Section 368(a) of the Code.
 
     For purposes of this Agreement: (i) "Taxes" means any and all federal,
state, local, foreign or other taxes of any kind (together with any and all
interest, penalties, additions to tax and additional amounts imposed with
respect thereto) imposed by any taxing authority, including, without limitation,
taxes or other charges on or with respect to income, franchises, windfall or
other profits, gross receipts, property, sales, use, capital stock, payroll,
employment, social security, workers' compensation, unemployment compensation,
or net worth, and taxes or other charges in the nature of excise, withholding,
ad valorem or value added, and includes, without limitation, any liability for
Taxes of another person, as a transferee or successor, under Treas. Reg. ss.
1.1502-6 or analogous provision of Law or otherwise; and (ii) "Tax Return" means
any return, report or similar statement (including the attached schedules)
required to be filed with respect to any Tax, including, without limitation, any
information return, claim for refund, amended return or declaration of estimated
Tax.
 
   
     SECTION 3.14. Opinion of Financial Advisor. The Board of Directors of the
Company has received, on the date of this Agreement, the oral opinion of Lazard
Freres & Co. LLC ("Lazard"), to be confirmed in writing, to the effect that, as
of such date, the aggregate Merger Consideration to be received by the Company's
shareholders in the Merger is fair to the Company's shareholders from a
financial point of view. A copy of the written opinion of Lazard will be
delivered to Parent as soon as practicable after the date of this Agreement.
    
 
     SECTION 3.15. Takeover Laws; Company Rights Agreement. (a) The Company has
taken all action required to be taken by it in order to exempt this Agreement
and the transactions contemplated hereby from, and this Agreement is exempt
from, the requirements of all applicable "moratorium", "control share", "fair
price" and other anti-takeover Laws and regulations (collectively, "Takeover
Laws") of (i) the State of New York, including, without limitation, Section 912
of the NYBCL and (ii) the State of Connecticut, including, without limitation,
Section 33-841 through Section 33-844 of the Connecticut Business Corporation
Act.
 
     (b) The Company has (i) duly entered into an appropriate amendment to the
Company Rights Agreement, a true and complete copy of which amendment has been
provided to Parent, and (ii) taken all other action necessary or appropriate so
that the entering into of this Agreement and the consummation of the
transactions contemplated hereby (including the Merger) do not and will not
result in the ability of any person to exercise any Company Rights under the
Company Rights Agreement or enable or require the Company Rights to separate
from the Shares to which they are attached or to be triggered or become
exercisable, and the Company Rights Agreement, as so amended, has not been
further amended or modified except in accordance herewith.
 
     (c) No "Distribution Date" or "Shares Acquisition Date" (as such terms are
defined in the Company Rights Agreement) has occurred.
 
     SECTION 3.16. Required Vote of the Company Shareholders. The affirmative
vote of the holders of two-thirds of the Shares outstanding and entitled to vote
at the Company Meeting (the "Company Shareholder Approval") is required to
approve this Agreement and the Merger. No other vote of the shareholders of the
Company is required by Law, the certificate of incorporation or bylaws of the
Company or otherwise in order for the Company to consummate the Merger and the
other transactions contemplated hereby.
 
     SECTION 3.17. Finders or Brokers. Except for Lazard, a true and complete
copy of whose engagement agreement has been provided to Parent, neither the
Company nor any of its Subsidiaries has employed any
 
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investment banker, broker, finder or intermediary who might be entitled to any
fee or any commission in connection with or upon consummation of the Merger.
 
                                   ARTICLE IV
 
                    REPRESENTATIONS AND WARRANTIES OF PARENT
 
     Parent and Merger Sub represent and warrant to the Company that except as
set forth in the corresponding sections or subsections of the Disclosure Letter
delivered to the Company by Parent concurrently with entering into this
Agreement (the "Parent Disclosure Letter"):
 
     SECTION 4.1. Organization, Qualification, Etc. (a) Parent is a corporation
duly organized, validly existing and in good standing under the Laws of the
jurisdiction of its incorporation and has the corporate power and authority to
own its assets and to carry on its business as it is now being conducted, and is
duly qualified to do business and is in good standing in each jurisdiction in
which the ownership of its assets or the conduct of its business requires such
qualification, except for jurisdictions in which such failure to be so qualified
or to be in good standing does not, individually or in the aggregate, have a
Material Adverse Effect on Parent. The copies of Parent's certificate of
incorporation and bylaws filed or incorporated by reference in Parent's Annual
Report on Form 10-K for the year ended December 31, 1997 ("Parent's 1997 Form
10-K") are complete and correct and in full force and effect on the date hereof.
 
     (b) Each of Parent's Subsidiaries is an entity duly organized, validly
existing and in good standing (where applicable) under the Laws of its
jurisdiction of incorporation or organization, has the corporate power and
authority to own its assets and to carry on its business as it is now being
conducted, and is duly qualified to do business and is in good standing in each
jurisdiction in which the ownership of its assets or the conduct of its business
requires such qualification, except where the failure to be so organized,
existing, qualified or in good standing does not, individually or in the
aggregate, have a Material Adverse Effect on Parent. All the outstanding shares
of capital stock of, or other ownership interests in, Parent's Significant
Subsidiaries are validly issued, fully paid and non-assessable and, other than
directors' qualifying shares, are owned by Parent, directly or indirectly, free
and clear of all Encumbrances, except for Encumbrances which individually or in
the aggregate do not have a Material Adverse Effect on Parent. There are no
existing Share Arrangements relating to the issued or unissued capital stock or
other securities of, or other ownership interests in, any Significant Subsidiary
of Parent, other than directors' qualifying shares. None of the certificates of
incorporation or bylaws or other organizational documents of any of Parent's
Significant Subsidiaries purport to grant rights to any person other than (1)
customary rights given to all stockholders pro rata in accordance with their
holdings and (2) customary rights with respect to corporate governance
(including rights to notices) and rights of indemnification of directors and
officers. Parent has delivered to the Company complete and correct copies of the
certificate of incorporation and bylaws or other organizational documents of
each of Parent's Significant Subsidiaries which is not wholly owned by Parent
and/or another of its wholly owned Subsidiaries (ignoring for this purpose
directors' qualifying shares).
 
     A complete listing of Parent's Subsidiaries is set forth in Section 4.1(b)
of the Parent Disclosure Letter. Except for Parent's Subsidiaries listed in
Section 4.1(b) of the Parent Disclosure Letter, Parent does not directly or
indirectly own any equity or similar interest in, or any interest convertible
into or exchangeable or exercisable for any equity or similar interest in, any
corporation, partnership, joint venture or other business association or entity
that directly or indirectly conducts any activity which is material to Parent
and its Subsidiaries taken as a whole.
 
     Neither Parent nor any of its Subsidiaries is the beneficial owner of any
Shares.
 
     SECTION 4.2. Capital Stock. The authorized stock of Parent consists of
100,000,000 shares of Parent Common Stock, and 3,000,000 shares of preferred
stock, no par value ("Parent Preferred Stock"). The shares of Parent Common
Stock to be issued in the Merger will, when issued, be validly issued fully paid
and non-assessable. As of June 30, 1998, 12,324,240 shares of Parent Common
Stock and no shares of Parent Preferred Stock were issued and outstanding and
4,553,723 shares of Parent Common Stock were held in treasury. All of the
outstanding shares of Parent Common Stock have been validly issued and are fully
paid and non-
 
                                      A-16
<PAGE>   145
 
assessable. As of June 30, 1998, there were no outstanding Share Arrangements to
which Parent is a party relating to the issued or unissued capital stock or
other securities of, or other ownership interests in Parent other than:
 
          (i) rights ("Parent Rights") to acquire shares of Parent Preferred
     Stock pursuant to the Rights Agreement, dated as of June 25, 1996, as
     amended, between Parent and The Bank of New York (the "Parent Rights
     Agreement"); and
 
          (ii) options and other rights to receive or acquire 2,296,410 shares
     of Parent Common Stock granted on or prior to June 30, 1998 pursuant to
     employee incentive or benefit plans, programs and arrangements and
     non-employee director plans.
 
     (b) Since June 30, 1998, there have been no increases to any of the amounts
set forth in Section 4.2(a), other than by reason of issuances of shares of
Parent Common Stock upon exercise of any of the options or rights enumerated in
clause (ii) of Section 4.2(a), which issuances have reduced the applicable
number in clause (ii) of Section 4.2(a) by a corresponding amount, nor has
Parent modified, amended or entered into new Share Arrangements.
 
     SECTION 4.3. Corporate Authority; No Violation. (a) Parent has the
corporate power and authority to enter into this Agreement and to carry out its
obligations hereunder. The execution and delivery of this Agreement and the
performance by Parent of its obligations hereunder have been duly and validly
authorized by the Board of Directors of Parent and, except for the Parent
Stockholder Approval (as defined in Section 4.16), no other corporate
proceedings on the part of Parent are necessary to authorize this Agreement or
the transactions contemplated hereby. The Board of Directors of Parent, at a
meeting duly called and held at which a quorum was present throughout, has
unanimously determined that the transactions contemplated by this Agreement are
in the best interest of Parent and its stockholders and to recommend to such
stockholders that they vote in favor of the Parent Stockholder Proposal (as
defined in Section 5.3) (the "Parent Board Recommendation"). This Agreement has
been duly and validly executed and delivered by Parent and, assuming this
Agreement constitutes a valid and binding agreement of the other parties hereto,
constitutes a valid and binding agreement of Parent, enforceable against Parent
in accordance with its terms (except insofar as enforceability may be limited by
applicable bankruptcy, insolvency, reorganization, moratorium or similar Laws
affecting creditors' rights generally, or by principles governing the
availability of equitable remedies).
 
     (b) The execution, delivery and performance of this Agreement by Parent do
not, and the consummation by Parent of the Merger and the other transactions
contemplated hereby will not, constitute or result in (i) a breach or violation
of, or a default under, or the creation of any rights in favor of any party
under, the certificate of incorporation or bylaws of Parent or the comparable
governing instruments of any of its Subsidiaries, (ii) a breach or violation of,
or a default under, or an acceleration of any obligations under, or the creation
of a lien, pledge, security interest or other encumbrance on the assets of
Parent or any of its Subsidiaries (with or without notice, lapse of time or
both) pursuant to, any Contract binding upon Parent or any of its Subsidiaries
("Parent Contracts") or (provided, as to consummation, the filings and notices
are made, and approvals are obtained, as referred to in Section 4.3(c)) any
applicable Law or Decree or governmental permit or license to which Parent or
any of its Subsidiaries is subject, or (iii) any change in the rights or
obligations of any party under any of the Parent Contracts, except for any
breach, violation, default, acceleration, creation or change that does not,
individually or in the aggregate, have a Material Adverse Effect on Parent.
 
     (c) Other than in connection with or in compliance with the provisions of
the Securities Act, the Exchange Act, the HSR Act, and the securities or blue
sky Laws of the various states and other than the filing of the Delaware
Certificate of Merger with the Delaware Secretary of State and the New York
Certificate of Merger with the New York Department of State, no authorization,
consent or approval of, or filing with, any Governmental Entity is necessary for
the consummation by Parent of the transactions contemplated by this Agreement,
except for such authorizations, consents, approvals or filings that, if not
obtained or made, would not, individually or in the aggregate, have a Material
Adverse Effect on Parent.
 
                                      A-17
<PAGE>   146
 
     SECTION 4.4. Reports and Financial Statements. Parent has timely filed with
the SEC all forms, reports, schedules, statements and other documents required
to be filed by it since December 31, 1995 under the Securities Act or the
Exchange Act (such documents, as supplemented or amended since the time of
filing, the "Parent SEC Reports"). As of their respective dates, Parent SEC
Reports, including without limitation, any financial statements or schedules
included or incorporated by reference therein, at the time filed (and, in the
case of registration statements and proxy statements, on the dates of
effectiveness and the dates of mailing, respectively) (i) complied in all
material respects with the applicable requirements of the Securities Act and the
Exchange Act, and (ii) did not contain any untrue statement of a material fact
or omit to state a material fact required to be stated therein or necessary to
make the statements therein, in light of the circumstances under which they were
made, not misleading. The audited consolidated financial statements and
unaudited consolidated interim financial statements included or incorporated by
reference in Parent SEC Reports (including any related notes and schedules)
fairly present, in all material respects, the financial position of Parent and
its consolidated Subsidiaries as of the dates thereof and the results of their
operations and their cash flows for the periods set forth therein, in each case
in accordance with past practice and GAAP consistently applied during the
periods involved (except as otherwise disclosed in the notes thereto and
subject, where appropriate, to normal year-end adjustments that would not be
material in amount or effect).
 
     SECTION 4.5. No Undisclosed Liabilities. Neither Parent nor any of its
Subsidiaries has any liabilities or obligations of any nature, whether or not
accrued, contingent or otherwise, except (a) liabilities or obligations
disclosed or reserved against in the unaudited consolidated interim financial
statements of Parent as of and for the three months ended March 31, 1998
included in Parent SEC Reports or disclosed in the footnotes thereto or in the
footnotes to the audited consolidated financial statements of Parent as of and
for the fiscal year ended December 31, 1997 included in Parent SEC Reports or
otherwise disclosed in Parent's 1997 Form 10-K or in Parent's Quarterly Report
on Form 10-Q for the quarter ended March 31, 1998, and (b) liabilities or
obligations which do not, individually or in the aggregate, have a Material
Adverse Effect on Parent.
 
     SECTION 4.6. Compliance with Laws. Parent and each of its Subsidiaries
each:
 
          (a) in the conduct of its businesses is in compliance with all Laws
     and Decrees applicable thereto or to the employees conducting such
     businesses;
 
          (b) has all permits, licenses, authorizations, orders and approvals
     of, and have made all filings, applications and registrations with, all
     Governmental Entities that are required in order to permit it to conduct
     its businesses substantially as presently conducted; all such permits,
     licenses, authorizations, orders and approvals are in full force and effect
     and, to the best of Parent's knowledge, no suspension or cancellation of
     any of them is threatened; and
 
          (c) has received, since December 31, 1995, no notification or
     communication from any Governmental Entity (i) asserting that it is not in
     compliance with any of the Laws or Decrees which such Governmental Entity
     enforces, or (ii) threatening to revoke any permit, license, authorization,
     order or approval; except where the failure of any of the foregoing to be
     true does not, individually or in the aggregate, have a Material Adverse
     Effect on Parent.
 
     SECTION 4.7. Environmental Laws. (a) To Parent's knowledge, neither Parent
nor any of its Subsidiaries is the subject of any pending or threatened
Litigation (whether civil, criminal, administrative or arbitral) by any
Governmental Entity or other person alleging liability or damages under or
non-compliance with any Environmental Law which, individually or in the
aggregate, has a Material Adverse Effect on Parent; (b) neither the conduct nor
the operation of Parent or its Subsidiaries violates or has in the past violated
any applicable Environmental Law or applicable Environmental Decree except as
does not, individually or in the aggregate, have a Material Adverse Effect on
Parent; and (c) to the knowledge of Parent, there is not now on, in or under any
property owned, leased or operated by Parent or any of its Subsidiaries any of
the following: (1) underground storage tanks or surface impoundments, (2)
asbestos-containing materials, (3) polychlorinated biphenyls, or (4) other
Hazardous Substances or petroleum products, in each case which would reasonably
be expected to form the basis of liability or other obligation of Parent or any
of its
 
                                      A-18
<PAGE>   147
 
Subsidiaries under any applicable Environmental Laws, except for such
liabilities or obligations which do not, individually or in the aggregate, have
a Material Adverse Effect on Parent.
 
     SECTION 4.8. Employee Benefit Plans. (a) Section 4.8 of the Parent
Disclosure Schedule contains a complete list of all material written bonus,
vacation, deferred compensation, pension, retirement, profit-sharing, thrift,
savings, employee stock ownership, stock bonus, stock purchase, restricted stock
and stock option plans, employment or severance contracts, medical, dental,
disability, health and life insurance plans, and other employee benefit and
fringe benefit plans, or other Contracts maintained or contributed to by Parent
or any of its Subsidiaries for the benefit of officers, former officers,
employees, former employees, directors, former directors, or the beneficiaries
of any of the foregoing or pursuant to which Parent or any of its Subsidiaries
may have any liability (collectively (whether or not material), the "Parent
Compensation and Benefit Plans") that are Contracts with, or plans maintained
primarily for the benefit of, individuals employed or rendering services in the
United States and are not Multiemployer Plans (the "U.S. Parent Compensation and
Benefit Plans").
 
     (b) Parent has used its reasonable best efforts to have provided or made
available to the Company copies of all Parent Compensation and Benefit Plans
listed on Section 4.8 of the Parent Disclosure Schedule (excluding, however,
Multiemployer Plans and Parent Compensation and Benefit Plans which have been
filed with or incorporated by reference into Parent's 1997 Form 10-K),
including, but not limited to, all amendments thereto, and all of such copies
that have been delivered are true and correct.
 
     (c) Each of the Parent Compensation and Benefit Plans has been and is being
administered in accordance with the terms thereof and all applicable Law except
where the failure to do so does not, individually or in the aggregate, have a
Material Adverse Effect on Parent. Each Pension Plan included in the U.S. Parent
Compensation and Benefit Plans (a "Parent Pension Plan") which is intended to be
qualified under Section 401(a) of the Code has received a favorable
determination letter from the Internal Revenue Service, and Parent is not aware
of any circumstances which could result in the revocation or denial of any such
favorable determination letter. To Parent's knowledge, no material "prohibited
transaction," within the meaning of Section 4975 of the Code or Section 406 of
ERISA, has occurred with respect to any U.S. Parent Compensation and Benefit
Plan. There is no pending or, to the Parent's knowledge, threatened Litigation
relating to any of the U.S. Parent Compensation and Benefit Plans which,
individually or in the aggregate, has a Material Adverse Effect on Parent.
 
     (d) No material liability under Title IV of ERISA has been or is reasonably
expected to be incurred by Parent or any of its Subsidiaries or any entity which
is considered one employer with Parent under Section 4001(a)(15) of ERISA or
Section 414 of the Code (any such entity, a "Parent ERISA Affiliate"), other
than such liabilities that have previously been satisfied. No notice of a
"reportable event," within the meaning of Section 4043 of ERISA, for which the
30-day reporting requirement has not been waived has been required to be filed
for any Parent Pension Plan or by any Parent ERISA Affiliate within the past 12
months.
 
     (e) All contributions, premiums and payments required to be made under the
terms of any Parent Compensation and Benefit Plan have been made, except where
the failure to do so does not, individually or in the aggregate, have a Material
Adverse Effect on Parent. Neither any Parent Pension Plan nor any single-
employer plan of a Parent ERISA Affiliate has an "accumulated funding
deficiency" (whether or not waived) within the meaning of Section 412 of the
Code or Section 302 of ERISA. Neither Parent nor any of its Subsidiaries has
provided, or is required to provide, security to any Parent Pension Plan or to
any single-employer plan of a Parent ERISA Affiliate pursuant to Section
401(a)(29) of the Code.
 
     (f) Under each Parent Pension Plan which is a defined benefit plan, as of
the last day of the most recent plan year ended prior to the date hereof, the
actuarially determined present value of all "benefit liabilities", within the
meaning of Section 4001(a)(16) of ERISA (as determined on the basis of the
actuarial assumptions contained in such Parent Pension Plan's most recent
actuarial valuation) did not exceed the then current value of the assets of such
Parent Pension Plan, and there has been no adverse change in the financial
condition of such Parent Pension Plan (with respect to either assets or
benefits) since the last day of the most recent plan year.
 
                                      A-19
<PAGE>   148
 
     (g) Neither Parent nor any of its Subsidiaries contributes to or is
required to contribute to any Multiemployer Plan. Neither Parent nor any of its
Subsidiaries has incurred any material withdrawal liability (within the meaning
of Section 4201 of ERISA) under any Multiemployer Plan within the past 5 years
that has not been satisfied, nor could any such material withdrawal liability
reasonably be expected to be incurred.
 
     (h) Except as set forth in the Parent Compensation and Benefit Plans listed
in Section 4.8 of the Parent Disclosure Schedule or filed with or incorporated
by reference into Parent's 1997 Form 10-K, the execution of, and performance of
the transactions contemplated in, this Agreement will not (either alone or upon
the occurrence of any additional or subsequent events) (i) constitute a Parent
Change in Control Event with respect to officers and directors of Parent, or
(ii) result in any payment or benefit that will or may be made by Parent or any
of its Subsidiaries or any of their respective affiliates that will be
characterized as an "excess parachute payment," within the meaning of Section
280G(b)(1) of the Code. "Parent Change in Control Event" shall mean an event
under any Parent Compensation and Benefit Plan, trust or loan that will or may
result in any payment (whether of severance pay or otherwise), acceleration,
forgiveness of indebtedness, vesting, distribution, increase in benefits or
obligation to fund benefits with respect to any employee.
 
     (i) The contributions of Parent and any of its Subsidiaries to any trust
described in Section 501(c)(9) of the Code have complied with Section 419A of
the Code.
 
     SECTION 4.9. Absence of Certain Changes or Events. Since December 31, 1997
the businesses of Parent and its Subsidiaries have been conducted in all
material respects in the ordinary course consistent with past practice, Parent
and its Subsidiaries have not engaged in any transaction or series of related
transactions material to Parent and its Subsidiaries taken as a whole other than
in the ordinary course consistent with past practice, and there has not been any
event, occurrence or development, alone or taken together with all other
existing facts, that, individually or in the aggregate, has a Material Adverse
Effect on Parent.
 
     SECTION 4.10. Litigation. There is no Litigation pending (or, to Parent's
knowledge, threatened) against Parent or any of its Subsidiaries or any of their
respective properties which, individually or in the aggregate, has a Material
Adverse Effect on Parent. Parent is not subject to any Decree that, individually
or in the aggregate, has a Material Adverse Effect on Parent.
 
     SECTION 4.11. Material Contracts. All of the Parent Contracts that are
required to be described in the Parent SEC Reports or to be filed as exhibits
thereto are described in the Parent SEC Reports or filed as exhibits thereto.
Neither Parent nor any of its Subsidiaries nor any other party is in breach of
or in default under any Parent Contract except for such breaches and defaults
which do not, individually or in the aggregate, have a Material Adverse Effect
on Parent.
 
     SECTION 4.12. Labor Matters. As of the date of this Agreement, Parent and
its U.S. Subsidiaries do not have any collective bargaining agreements with any
persons employed by Parent or any of its U.S. Subsidiaries or any persons
otherwise performing services primarily for Parent or any of its U.S.
Subsidiaries, nor is Parent or any of its U.S. Subsidiaries in the process of
negotiating any such agreement. There is no labor strike, dispute or stoppage
pending or, to the knowledge of Parent, threatened against Parent or any of its
Subsidiaries which, individually or in the aggregate, has a Material Adverse
Effect on Parent. None of Parent or its Subsidiaries is the subject to a
proceeding asserting that it has committed an unfair labor practice (within the
meaning of the National Labor Relations Act) or seeking to compel it to bargain
with any labor organization as to wages and conditions of employment, which
proceeding, individually or in the aggregate, has a Material Adverse Effect on
Parent. As of the date of this Agreement, there are, to the knowledge of Parent,
no organizational efforts currently being made involving any of the employees of
Parent or any of its Subsidiaries.
 
     SECTION 4.13. Tax Matters. (a) Parent and each of its Subsidiaries have (i)
filed all federal, state, local and foreign Tax Returns required to be filed by
them (taking into account extensions), (ii) paid or accrued all Taxes shown to
be due on such Returns or which are otherwise due and payable and (iii) paid or
accrued all Taxes for which a notice of assessment or collection has been
received, except in the case of clause (i), (ii) or (iii) for any such filings,
payments or accruals which do not, individually or in the aggregate, have a
Material Adverse Effect on Parent. Neither the Internal Revenue Service nor any
other taxing
 
                                      A-20
<PAGE>   149
 
authority has asserted in writing any claim for Taxes, or to the knowledge of
Parent, is threatening to assert any claims for Taxes, against Parent or any of
its Subsidiaries which claims, if determined adversely to Parent or such
Subsidiary, would, individually or in the aggregate, have a Material Adverse
Effect on Parent. Parent and each of its Subsidiaries have withheld or collected
and paid over to the appropriate Governmental Entities (or are properly holding
for such payment) all Taxes required by Law to be withheld or collected, except
for amounts which do not, individually or in the aggregate, have a Material
Adverse Effect on Parent. There are no outstanding agreements or waivers
extending the statutory period of limitation applicable to any material Tax
Return of Parent or any of its Subsidiaries. Neither Parent nor any of its
Subsidiaries has made an election under Section 341(f) of the Code. There are no
liens for Taxes upon the assets of Parent or any of its Subsidiaries (other than
liens for Taxes that are not yet due), except for liens which do not,
individually or in the aggregate, have a Material Adverse Effect on Parent.
Neither Parent nor any of its Subsidiaries (i) has any liability under Treasury
Regulation Section 1.1502-6 or analogous state, local, or foreign law provision,
except to the extent any such liabilities, individually or in the aggregate, do
not have a Material Adverse Effect on the Parent, or (ii) is a party to a Tax
sharing or Tax indemnity agreement or any other agreement of a similar nature
with any entity other than Parent or any of its Subsidiaries that remains in
effect and under which the Parent or any such Subsidiary could have any material
liability for Taxes. No claim has been made in writing by a taxing authority in
a jurisdiction where Parent or any of its Subsidiaries does not file Tax Returns
that Parent or any of its Subsidiaries is or may be subject to taxation by that
jurisdiction where such claim, if determined adversely to Parent or such
Subsidiary, would, individually or in the aggregate have a Material Adverse
Effect on Parent. Neither Parent nor any of its Subsidiaries is the subject of
any currently ongoing audit or examination with respect to a material amount of
Taxes, nor, to the knowledge of Parent, has any such audit been threatened or
proposed by any taxing authority.
 
     (b) Parent does not know of any fact with respect to Parent and its
Subsidiaries that could reasonably be expected to prevent the Merger from
qualifying as a reorganization within the meaning of Section 368(a) of the Code.
 
     SECTION 4.14. Opinion of Financial Advisor. The Board of Directors of
Parent has received, on the date of this Agreement, the oral opinion of Stern
Stewart & Company, to be confirmed in writing, to the effect that, as of such
date, the aggregate Merger Consideration is fair to Parent from a financial
point of view. A copy of the written opinion of Stern Stewart & Company will be
delivered to the Company as soon as practicable after the date of this
Agreement.
 
     SECTION 4.15. Takeover Laws; Parent Rights Agreement. (a) Parent has taken
all action required to be taken by it in order to exempt this Agreement and the
transactions contemplated hereby from, and this Agreement is exempt from, the
requirements of all applicable "moratorium", "control share", "fair price" and
other anti-takeover Laws and regulations of (i) the State of Delaware, including
without limitation Section 203 of the DGCL and (ii) the State of Michigan,
including without limitation Sections 450.1775 to 450.1784 and Sections 450.1790
to 450.1799.
 
     (b) Parent's entering into of this Agreement and the consummation of the
transactions contemplated hereby (including the Merger) do not and will not
result in the ability of any person to exercise any Parent Rights under the
Parent Rights Agreement or enable or require the Parent Rights to separate from
the shares of Parent Common Stock to which they are attached or to be triggered
or become exercisable.
 
     (c) No "Distribution Date" or "Shares Acquisition Date" (as such terms are
defined in the Parent Rights Agreement) has occurred.
 
     SECTION 4.16. Required Vote of Parent Stockholders. The affirmative vote of
the holders of a majority of the total number of shares of Parent Common Stock
present in person or by proxy and entitled to vote at the Parent Meeting is
required to approve the Parent Stockholder Proposal (such affirmative vote, or
such other affirmative vote as may be required pursuant to applicable Law, NYSE
rule or regulation or Parent's certificate of incorporation or bylaws in
connection with an Alternative Transaction adopted pursuant to Section 1.7, the
"Parent Stockholder Approval"). Other than the Parent Stockholder Approval, no
other vote of the stockholders of Parent is required by Law, the certificate of
incorporation or bylaws of Parent or otherwise in order for Parent to consummate
the Merger and the other transactions contemplated hereby.
 
                                      A-21
<PAGE>   150
 
     SECTION 4.17. Finders or Brokers. Except for Stern Stewart & Company, a
true and complete copy of whose engagement agreement has been provided to the
Company, and Chase Securities Inc., neither Parent nor any of its Subsidiaries
has employed any investment banker, broker, finder or intermediary who might be
entitled to any fee or any commission in connection with or upon consummation of
the Merger.
 
     SECTION 4.18. Financing. Parent has received written commitments dated the
date hereof (the "Financing Commitments") to obtain the funds necessary for the
consummation of transactions contemplated hereby, including payment of the
aggregate cash to be paid in respect of Shares converted into the right to
receive cash in the Merger and all related costs (the "Financing Funds"), true
and complete copies of which have been delivered to the Company.
 
                                   ARTICLE V
 
                            COVENANTS AND AGREEMENTS
 
     Parent, Merger Sub and the Company hereby covenant and agree with one
another as follows:
 
     SECTION 5.1. Conduct of Business by the Company and Parent. During the
period between the date hereof and the Effective Time, except as may otherwise
be consented to in writing by the other parties hereto (which consent shall not
be unreasonably withheld) or as may be expressly permitted pursuant to this
Agreement or as set forth in Section 5.1 of the Company Disclosure Letter or
Section 5.1 of the Parent Disclosure Letter, as applicable:
 
          (a) The Company shall, and shall cause each of its Subsidiaries to,
     conduct its operations in the ordinary and usual course of business in
     substantially the same manner as heretofore conducted and use its
     reasonable best efforts to preserve intact its business organization and
     goodwill in all material respects, keep available the services of its
     officers and employees as a group, subject to changes in the ordinary
     course, and maintain its existing relationships with suppliers,
     distributors, customers and others having business relationships with it.
     Without limiting the generality of the foregoing, the Company shall not,
     and shall cause its Subsidiaries not to (i) authorize, declare, set aside
     or pay any dividends on or make any distribution with respect to its
     outstanding shares of stock, except that (1) wholly owned U.S. Subsidiaries
     of the Company may pay dividends on or make distributions of cash to the
     Company or another wholly owned U.S. Subsidiary of the Company and (2)
     wholly owned (except for directors' qualifying shares) non-U.S.
     Subsidiaries of the Company may pay dividends to other wholly owned (except
     for directors' qualifying shares) Subsidiaries of the Company so long as
     such dividends do not have adverse tax consequences to the Company or any
     of its Subsidiaries; (ii) except in the ordinary course of business
     consistent with past practice, enter into or amend any employment,
     severance or similar agreements or arrangements with, or grant any bonus or
     salary increases or otherwise increase the compensation or benefits
     provided to, any of their respective employees; provided, however, that,
     except as otherwise provided in Section 2.4(c), (A) any of the foregoing
     actions with respect to any director or executive officer and (B) any new
     change-of-control agreement or amendment of any existing change-of-control
     agreement with any person shall in all cases require Parent's consent;
     (iii) except as expressly permitted by Section 5.8, authorize or publicly
     announce an intention to authorize, or enter into an agreement with respect
     to, or take any action to consummate any agreement or arrangement with
     respect to (1) any merger, consolidation or business combination (other
     than the Merger), (2) any liquidation, dissolution, restructuring,
     recapitalization or other reorganization or (3) any acquisition or
     disposition of a material amount of assets (other than purchases and sales
     of raw materials, supplies, inventory, products or services in the ordinary
     course of business consistent with past practice) or securities, or any
     release or relinquishment of any material rights under any material
     Contracts; (iv) propose or adopt any amendments to its certificate of
     incorporation, bylaws or the Company Rights Agreement or take any action
     with respect to, or make any determination under, the Company Rights
     Agreement (including redeeming the Company Rights or declaring the Company
     Rights Agreement or the Company Rights inapplicable to a third party); (v)
     issue, sell, pledge or otherwise dispose of or encumber any capital stock
     owned by it in any of its Subsidiaries or any interests in the EGS
     Electrical Group LLC; (vi) except, in the case of the Company, upon
     exercise of Company Options or Company Warrants outstanding on the
 
                                      A-22
<PAGE>   151
 
     date hereof and set forth in Section 3.2, issue, sell or otherwise permit
     to become outstanding any shares of its capital stock, or effect any stock
     split or reverse stock split or otherwise change its equity capitalization
     as it existed on July 13, 1998, or redeem, repurchase or otherwise acquire
     any shares of its capital stock; (vii) grant or award any options,
     warrants, conversion rights or other rights to acquire any shares of
     capital stock of the Company or its Subsidiaries, or enter into any other
     Share Arrangement relating to its capital stock; (viii) except as required
     by applicable Law or an existing Contract disclosed to Parent, amend the
     terms of any Company Compensation or Benefit Plan, including the Company
     Plans (except as provided in Section 2.4(b)) or adopt any new employee
     benefit or compensation plan; (ix) except pursuant to existing credit
     agreements or other agreements of the type disclosed in Section 5.1 of the
     Company Disclosure Letter and entered into in the ordinary course
     consistent with past practice, incur, create, assume or otherwise become
     liable for any indebtedness for borrowed money; (x) except in the ordinary
     course of business, consistent with past practice, transfer, lease,
     license, mortgage, pledge or encumber any material asset or material amount
     of assets; (xi) make any material Tax election or settle or compromise any
     material Tax liability or take any action which could reasonably be
     expected to cause the Merger to fail to qualify as a reorganization within
     the meaning of Section 368(a) of the Code; (xii) incur or commit to any
     capital expenditure; (xiii) implement or adopt any change in its accounting
     principles, practices or methods, other than as may be required by GAAP or
     Regulation S-X promulgated under the Exchange Act; or (xiv) agree or commit
     to do anything prohibited by this Section 5.1(a).
 
   
          (b) Parent shall, and shall cause each of its Subsidiaries to, conduct
     its operations in the ordinary and usual course of business in
     substantially the same manner as heretofore conducted and use its
     reasonable best efforts to preserve intact its business organization and
     goodwill in all material respects, keep available the services of its
     officers and employees as a group, subject to changes in the ordinary
     course, and maintain satisfactory relationships with suppliers,
     distributors, customers and others having business relationships with it.
     Without limiting the generality of the foregoing, Parent shall not, and in
     the case of clauses (ii), (v), (vi), (vii), (viii), (ix), (x) and (xi)
     shall cause its Subsidiaries not to, (i) authorize, declare, set aside or
     pay any dividends on, or make any distribution with respect to, its
     outstanding shares of stock, other than a dividend or distribution of stock
     for which there would be an adjustment in the Per Share Stock Amount
     pursuant to Section 2.1(d); (ii) authorize, or publicly announce an
     intention to authorize, or enter into an agreement with respect to (1)
     mergers, consolidations, acquisitions of a business, an operation, a
     product line or all or substantially all of the assets of an entity, or
     other business combinations, involving aggregate consideration in excess of
     $75 million (of which not more that $50 million shall be in cash and not
     more than $25 million shall be in Parent Common Stock); or (2) any
     liquidation, dissolution, restructuring, recapitalization or other
     reorganization, other than any stock dividend, subdivision, split or
     combination of shares for which there would be an adjustment in the Per
     Share Stock Amount pursuant to Section 2.1(d); (iii) propose or adopt any
     amendments to its certificate of incorporation, or any amendments to its
     bylaws that would adversely affect in any material respect the rights and
     preferences of the holders of shares of Parent Common Stock; (iv) propose
     or adopt any amendment to the Parent Rights Agreement or take any action
     with respect to, or make any determination under, the Parent Rights
     Agreement (including redeeming the Parent Rights or declaring the Parent
     Rights Agreement or Parent Rights inapplicable to any third party); (v)
     take any action which could reasonably be expected to cause the Merger to
     fail to qualify as a reorganization within the meaning of 368(a) of the
     Code; (vi) issue, sell or otherwise permit to become outstanding any shares
     of its capital stock except (x) upon exercise of options or other rights to
     acquire Parent Common Stock or (y) issuances or sales of up to $25 million
     of Parent Common Stock in connection with an acquisition; (vii) other than
     acquisitions of shares of Parent Common Stock held by employees of Parent
     or its Subsidiaries in the ordinary course, redeem, repurchase or otherwise
     acquire any shares of Parent Common Stock other than acquisitions of up to
     200,000 shares of Parent Common Stock in transactions complying with Rule
     10b-18 of the Exchange Act; (viii) grant or award any options, warrants,
     conversion rights or other rights to acquire any shares of capital stock of
     Parent or any of its Subsidiaries, or enter into any other Share
     Arrangement relating to such capital stock, except in the ordinary course
     of business; (ix) implement or adopt any change in its accounting
     principles, practices or
    
 
                                      A-23
<PAGE>   152
 
     methods, other than as may be required by GAAP or Regulation S-X
     promulgated under the Exchange Act; (x) incur or commit to any capital
     expenditures in excess of $40 million, in the aggregate; or (xi) agree or
     commit to do anything prohibited to it by this Section 5.1(b).
 
     SECTION 5.2. Investigation. During the period between the date hereof and
the Effective Time, except as set forth in the Company Disclosure Schedule or
the Parent Disclosure Schedule each of the Company and Parent shall afford to
one another and to one another's officers, employees, accountants, counsel and
other authorized representatives reasonable access, during normal business
hours, to its and its Subsidiaries' (a) plants, properties, Contracts, books and
records (including but not limited to (i) Tax Returns, (ii) audits, assessments,
reports, studies, monitoring results and any other information or documents
relevant to the environment or occupational health and safety and (iii)
accountants work papers), (b) any report, schedule or other document filed or
received by it pursuant to the requirements of federal or state securities Laws
and (c) any other information concerning its business, properties and personnel
as the other may reasonably request; provided, however, that no investigation
pursuant to this Section 5.2 shall affect or be deemed to modify any
representation or warranty made by the Company, Parent or Merger Sub. The
parties hereby agree that each of them will treat any such information in
accordance with the applicable Confidentiality Agreement between the Company and
Parent (each, a "Confidentiality Agreement"). Notwithstanding any provision of
this Agreement to the contrary, no party shall be obligated to make any
disclosure in violation of applicable Laws or if disclosure would cause a
forfeiture of attorney-client privilege. The Company and Parent will make
appropriate substitute disclosure arrangements if the circumstances of the
preceding sentence apply.
 
     SECTION 5.3. Stockholder Approval; Filings. (a) Subject to the terms and
conditions contained herein, (i) the Company shall submit this Agreement and the
Merger for approval to the holders of Shares at a meeting to be duly held for
this purpose by the Company (the "Company Meeting"), and (ii) Parent shall
submit the proposed issuance of Parent Common Stock in connection with the
Merger (or shall submit this Agreement and the Merger, if required because an
Alternative Transaction has been adopted pursuant to Section 1.7) (the matter
submitted, the "Parent Stockholder Proposal") for the Parent Stockholder
Approval to the holders of shares of Parent Common Stock at a meeting to be duly
held for this purpose by Parent (the "Parent Meeting"). The Company and Parent
shall take all action in accordance with the federal securities Laws, the NYBCL,
the DGCL and their respective certificates of incorporation and bylaws necessary
to duly convene the Company Meeting and the Parent Meeting. The Company and
Parent shall coordinate and cooperate with respect to the timing of such
meetings and shall use their reasonable best efforts to hold such meetings on
the same day and as soon as reasonably practicable after the date hereof.
Subject to the fiduciary duties of the respective Boards of Directors under
applicable Law as advised by counsel in connection with a Company Competing
Transaction or a Parent Business Combination, as applicable, the Boards of
Directors of the Company and Parent shall recommend that their respective
stockholders approve such matters, which recommendation shall be contained in
the Joint Proxy Statement (as defined below), and use their reasonable best
efforts to take all lawful action to solicit such approval by its respective
stockholders.
 
     (b) Each of Parent and the Company agrees to cooperate in the preparation
of a registration statement on Form S-4 (the "Registration Statement") to be
filed by Parent with the SEC in connection with the issuance of Parent Common
Stock in the Merger (including the joint proxy statement and other proxy
solicitation materials of Parent and the Company constituting a part thereof
(the "Joint Proxy Statement") and all related documents). Provided the Company
has cooperated as required above, Parent agrees to file the Registration
Statement with the SEC as promptly as practicable. Each of the Company and
Parent agrees to use its reasonable best efforts to cause the Registration
Statement to be declared effective under the Securities Act as promptly as
practicable after filing thereof, and to cause the Joint Proxy Statement to be
mailed as promptly as practicable to the shareholders of the Company and the
stockholders of Parent. Parent also agrees to use its reasonable best efforts to
obtain all necessary state securities Law or "blue sky" permits and approvals
required to carry out the transactions contemplated by this Agreement. Parent
and the Company each agrees to furnish to the other all information concerning
itself and its Subsidiaries, officers, directors and shareholders as may be
reasonably requested by the other in connection with the foregoing.
 
     (c) Each of the Company and Parent agrees, as to itself and its
Subsidiaries, that none of the information supplied or to be supplied by it for
inclusion or incorporation by reference in (i) the Registration
 
                                      A-24
<PAGE>   153
 
Statement will, at the time the Registration Statement and each amendment or
supplement thereto, if any, is filed with the SEC and at the time the
Registration Statement becomes effective under the Securities Act, and at the
times of the Company Meeting and the Parent Meeting, contain any untrue
statement of a material fact or omit to state any material fact required to be
stated therein or necessary to make the statements therein not misleading, and
(ii) the Joint Proxy Statement and any amendment or supplement thereto will, at
the date of mailing to stockholders and at the times of the Parent Meeting and
the Company Meeting, contain any untrue statement of a material fact or omit to
state any material fact necessary in order to make the statements made therein,
in light of the circumstances under which such statements are made, not
misleading. Each of the Company and Parent further agrees that if it shall
become aware prior to the times of the Company Meeting and the Parent Meeting of
any information that would cause any of the statements in the Joint Proxy
Statement or in the Registration Statement to be false or misleading with
respect to any material fact, or to omit to state any material fact necessary in
order to make the statements made therein not false or misleading, to promptly
inform the other party thereof and to take the necessary steps to correct the
Joint Proxy Statement.
 
     (d) Parent will advise the Company, promptly after Parent receives notice
thereof, of the time when the Registration Statement has become effective or any
supplement or amendment has been filed, of the issuance of any stop order or the
suspension of the qualification of the Parent Common Stock for offering or sale
in any jurisdiction, of the initiation or threat of any proceeding for any such
purpose, or of any request by the SEC for the amendment or supplement of the
Registration Statement or for additional information.
 
     (e) Promptly after the execution of this Agreement, Parent shall prepare
and file with the NYSE, and such other stock exchanges as shall be agreed upon,
listing applications covering the shares of Parent Common Stock issuable in the
Merger or upon exercise of the Company Options, and use its reasonable best
efforts to obtain, prior to the Effective Time, approval for the listing of such
shares of Parent Common Stock, subject only to official notice of issuance. The
Company shall as promptly as practicable furnish Parent with all information
concerning the Company and its Subsidiaries as may be required for inclusion in
such listing applications.
 
     (f) Parent and the Company shall cooperate with one another in obtaining
opinions of Wachtell, Lipton, Rosen & Katz, counsel to the Company, and Fried,
Frank, Harris, Shriver & Jacobson, counsel to Parent, each dated as of the
Closing Date, (i) in the form of Exhibits B and C, respectively, or (ii) if the
form of combination of Parent and the Company is changed pursuant to Section
1.7, such other legal opinions as are customary for the Alternative Transaction
and are reasonably acceptable to the Company or Parent, as applicable
("Alternate Legal Opinions") (and, in connection therewith, each of the Company
and Parent shall deliver to Wachtell, Lipton, Rosen & Katz, and Fried, Frank,
Harris, Shriver & Jacobson certificates of officers of the Company, Parent and
Merger Sub in form and substance reasonably satisfactory to such counsel).
 
     SECTION 5.4. Additional Reports. The Company and Parent shall each furnish
to the other copies of any Company SEC Reports or Parent SEC Reports, as the
case may be, which it files with the SEC on or after the date hereof, and the
Company and Parent, as the case may be, represents and warrants that as of the
respective dates thereof, such reports will not contain any untrue statement of
a material fact or omit to state a material fact required to be stated therein
or necessary to make the statement therein, in light of the circumstances under
which they were made, not misleading. Any unaudited consolidated interim
financial statements included in such reports (including any related notes and
schedules) will fairly present, in all material respects, the financial position
of the Company and its consolidated Subsidiaries or Parent and its consolidated
Subsidiaries, as the case may be, as of the dates thereof and the results of
operations and changes in financial position or other information included
therein for the periods or as of the dates then ended, in each case in
accordance with past practice and GAAP consistently applied during the periods
involved (except as otherwise disclosed in the notes thereto and subject, where
appropriate, to normal year-end adjustments).
 
     SECTION 5.5. Reasonable Best Efforts. Each of the parties shall use its
reasonable best efforts to take, or cause to be taken, all actions, and to do,
or cause to be done, and to assist and cooperate with the other parties in
doing, all things necessary, proper or advisable to consummate and make
effective, in the most
 
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<PAGE>   154
 
expeditious manner practicable, the Merger and the other transactions
contemplated by this Agreement, including (A) the obtaining of (and cooperating
with the other parties to obtain) waivers, consents, exemptions, licenses,
permits, authorizations, orders and approvals from, and the making of all other
necessary registrations and filings with, Governmental Entities (including,
without limitation, filings required to be made pursuant to the HSR Act), (B)
the obtaining of (and cooperating with the other parties to obtain) all waivers,
consents, exemptions, licenses, authorizations and approvals from third parties
which may be necessary or desirable to be obtained by reason of the Merger or in
order to consummate the transactions contemplated by, and to fully carry out the
purposes of and realize the benefits of, this Agreement, and (C) the execution
and delivery of any additional instruments necessary to consummate the
transaction contemplated by, and to fully carry out the purposes of and realize
the benefits of, this Agreement.
 
     SECTION 5.6. Accountants' "Comfort" Letters. The Company and Parent will
each use its reasonable best efforts to cause to be delivered to each other
letters from its respective independent accountants, dated a date within two
business days before the effective date of the Registration Statement, in form
reasonably satisfactory to the recipient and customary in scope for comfort
letters delivered by independent accountants in connection with registration
statements on Form S-4 under the Securities Act.
 
     SECTION 5.7. Takeover Statutes. None of the parties shall take any action
that would cause the transactions contemplated by this Agreement to be subject
to the requirements of any Takeover Law. If any Takeover Law shall become
applicable to the transactions contemplated by this Agreement, each of the
Company and Parent and the members of their respective Boards of Directors shall
grant such approvals and take such actions as are necessary so that the
transactions contemplated hereby may be consummated as promptly as practicable
on the terms contemplated hereby, and otherwise act to eliminate or minimize the
effects of such Takeover Law on the transactions contemplated hereby.
 
     SECTION 5.8. No Solicitation. (a) During the term of this Agreement, the
Company shall not, and shall not authorize or permit any of its Subsidiaries or
any of its or its Subsidiaries' directors, officers, employees, agents or
representatives, directly or indirectly, to solicit, initiate, encourage or
facilitate, or furnish or disclose non-public information in furtherance of, any
inquiries or the making of any proposal with respect to any recapitalization,
merger, consolidation or other business combination involving the Company, or
the acquisition of 10% or more of the outstanding capital stock of the Company
(other than upon exercise of Company Options and Company Warrants which are
outstanding as of the date hereof) or any Significant Subsidiary of the Company
or, except as permitted under Section 5.1 of the Company Disclosure Letter, the
acquisition of 15% or more of the assets of the Company and its Subsidiaries,
taken as a whole, in a single transaction or a series of related transactions,
or any combination of the foregoing (a "Company Competing Transaction"), or
negotiate or otherwise engage in discussions with any person (other than Parent,
Merger Sub or their respective directors, officers, employees, agents or
representatives) with respect to any Company Competing Transaction or enter into
any agreement, arrangement or understanding requiring it to abandon, terminate
or fail to consummate the Merger or any other transactions contemplated by this
Agreement, and will immediately cease all existing activities, discussions and
negotiations with any parties conducted heretofore with respect to any proposal
for a Company Competing Transaction; provided that, at any time prior to the
approval of the Merger by the shareholders of the Company, the Company may
furnish information to, and negotiate or otherwise engage in discussions with,
any party (a "Company Third Party") who (x) delivers a bona fide written
proposal for a Company Competing Transaction which was not solicited, initiated,
encouraged or facilitated by the Company, directly or indirectly, after the date
of this Agreement and (y) enters into an appropriate confidentiality agreement
with the Company (which agreement shall be no less favorable to the Company than
the Confidentiality Agreement, and a copy of which will be delivered to Parent
promptly after the execution thereof), if, but only if, the Board of Directors
of the Company determines in good faith by a majority vote, (i) after
consultation with and receipt of advice from its outside legal counsel, that
failing to take such action would constitute a breach of the fiduciary duties of
the Board of Directors of the Company under applicable Law, and (ii) after
consultation with the Company's independent financial advisors, that such
proposal could reasonably be expected to lead to a Superior Transaction (as
defined in Section 5.8(d)).
 
                                      A-26
<PAGE>   155
 
     (b) From and after the execution of this Agreement, the Company shall
promptly advise Parent in writing of the receipt, directly or indirectly, of any
inquiries or proposals relating to a Company Competing Transaction (including
the specific terms thereof and the identity of the third party), shall keep
Parent reasonably informed of the status of any such inquiries or proposals, of
the furnishing of information to the Company Third Party, and of any
negotiations or discussions relating thereto (including any changes or
adjustments to the material terms of such Company Competing Transaction as a
result of negotiations or otherwise).
 
     (c) If, prior to the approval of the Merger by the shareholders of the
Company, the Board of Directors of the Company determines in good faith by a
majority vote, with respect to any written proposal from a Company Third Party
for a Company Competing Transaction received after the date hereof that was not
solicited, initiated, encouraged or facilitated by the Company, directly or
indirectly, after the date of this Agreement, that such Company Competing
Transaction is a Superior Transaction and is in the best interest of the Company
and its shareholders and that failure to enter into such Company Competing
Transaction would constitute a breach of the fiduciary duties of the Board of
Directors of the Company under applicable Law, and the Board of Directors of the
Company has received (x) a written opinion (a copy of which shall have been
delivered to Parent) from the Company's independent financial advisors that the
Company Competing Transaction is a Superior Transaction and (y) the advice of
its outside legal counsel that failure to enter into such a Company Competing
Transaction would constitute a breach of the Board of Directors' fiduciary
duties under applicable Law, then the Company may terminate this Agreement and
enter into an acquisition agreement for the Superior Transaction; provided that,
prior to any such termination, and in order for such termination to be
effective, (i) the Company shall provide Parent two business days' written
notice that it intends to terminate this Agreement pursuant to this Section
5.8(c), identifying the Superior Transaction and the parties thereto and
delivering an accurate description of all material terms of the Superior
Transaction to be entered into and (ii) on the date of termination (provided
that the opinion and advice referred to in clauses (x) and (y) above shall
continue in effect without revocation, revision or modification), the Company
shall deliver to Parent (A) a written notice of termination of this Agreement
pursuant to this Section 5.8(c), (B) a wire transfer of immediately available
funds in the amount of the Company Termination Fee and the Commitment Expenses
(each as defined in Section 7.3), and (C) a written acknowledgment from the
Company and each other party to the Superior Transaction that it will not
contest the payment of the Company Termination Fee and Commitment Expenses.
 
     (d) "Superior Transaction" shall mean a Company Competing Transaction which
the Board of Directors of the Company reasonably determines is more favorable to
the Company and its shareholders than the Merger and which is not subject to any
financing condition. Reference in the foregoing definition to the "Merger" shall
include any proposed alteration of the terms of this Agreement committed to in
writing by Parent in response to such Company Competing Transaction.
 
     (e) During the term of this Agreement, Parent shall not, and shall not
authorize or permit any of its Subsidiaries or any of its or its Subsidiaries'
directors, officers, employees, agents or representatives, directly or
indirectly, to solicit or initiate any inquiries or the making of any proposal
with respect to any Parent Business Combination; provided that nothing herein
shall prohibit any of the foregoing persons from responding to unsolicited
inquiries or proposals, including by furnishing non-public information.
 
     SECTION 5.9. Public Announcements. Each of the parties agrees that it shall
not, nor shall any of their respective affiliates, issue or cause the
publication of any press release or other public announcement with respect to
the Merger, this Agreement or the transactions contemplated hereby without the
prior approval of the other party, except such disclosure as may be required by
Law or by any listing agreement with a national securities exchange; provided,
if such disclosure is required by Law or any such listing agreement, such
disclosure shall not be made without prior consultation of the other parties.
 
     SECTION 5.10. Indemnification and Insurance. (a) Parent and Merger Sub
agree that all rights to exculpation and indemnification for acts or omissions
occurring at or prior to the Effective Time now existing in favor of the current
or former directors or officers of the Company or any of its Subsidiaries (the
 
                                      A-27
<PAGE>   156
 
"Indemnified Parties") as provided in its certificate of incorporation or bylaws
or in any agreement shall survive the Merger and shall continue in full force
and effect in accordance with their terms.
 
     (b) For six years from the Effective Time, Parent shall indemnify, defend
and hold harmless each of the Indemnified Parties for acts or omissions
occurring at or prior to the Effective Time to the fullest extent permitted by
applicable Law, including with respect to taking all actions necessary to
advance expenses to the extent permitted by applicable Law.
 
     (c) Parent shall use its reasonable best efforts to obtain and maintain in
effect, or cause the Surviving Corporation to obtain and maintain in effect, for
six years from the Effective Time, the Company's current directors' and
officers' liability insurance covering those persons who are currently covered
by the Company's directors' and officers' liability insurance policy (a copy of
which has been heretofore delivered to Parent); provided, however, that in no
event shall Parent or the Surviving Corporation be required to expend in any
year an amount in excess of 200% of the annual premiums currently paid by the
Company for such insurance, and, provided, further, that if the annual premiums
of such insurance coverage exceed such amount, Parent shall or shall cause the
Surviving Corporation to obtain a policy with the greatest coverage available
for a cost not exceeding such amount.
 
     (d) The provisions of this Section 5.10 are intended to be for the benefit
of, and shall be enforceable by, each Indemnified Party and his or her heirs and
representatives.
 
     SECTION 5.11. Notification of Certain Matters. Each of the Company and
Parent shall give prompt notice to the other of any fact, event or circumstance
known to it that (i) is reasonably likely, individually or taken together with
all other existing facts, events and circumstances known to it, to result in any
Material Adverse Effect with respect to it, or (ii) would cause or constitute a
material breach of any of its representations, warranties, covenants or
agreements contained herein.
 
     SECTION 5.12. Board of Directors and Officers of Parent. The Board of
Directors of Parent shall take all action necessary to elect as of the Effective
Time the following persons to the Board of Directors of Parent: (i) Emerson U.
Fullwood, who shall be assigned to the class of directors whose term of office
expires at Parent's first annual meeting of stockholders after the Effective
Time and (ii) H. Kent Bowen, who shall be assigned to the class of directors
whose term of office expires at Parent's second annual meeting of stockholders
after the Effective Time.
 
     SECTION 5.13. Employee Plans and Benefit Arrangements. (a) From and after
the Effective Time, subject to applicable Law, Parent shall cause the Surviving
Corporation and its Subsidiaries to honor the obligations of the Company and its
Subsidiaries under all existing Company Compensation and Benefit Plans.
 
     (b) Parent agrees that, for at least one year from the Effective Time,
subject to applicable Law, the Surviving Corporation and its Subsidiaries shall
provide benefits to the individuals who, as of the Effective Time, were
employees of the Company or any of its Subsidiaries which will, in the
aggregate, be comparable to those currently provided by the Company and its
Subsidiaries to their employees (excluding, however, any stock option or any
other equity-based compensation plans and any individual employment, severance,
change in control or other similar agreement currently maintained by the Company
or its Subsidiaries). Nothing herein shall be construed to prevent the
termination of employment of any employee or any amendment or termination of any
Company Compensation and Benefit Plan to the extent permitted by the terms and
conditions thereof as in effect on the date hereof.
 
     (c) After the Effective Time, Parent shall grant (if applicable), and shall
cause the Surviving Corporation and its Subsidiaries to grant, to all
individuals who are, as of the Effective Time, employees of the Company or any
of its Subsidiaries credit for all service with the Company, any of its present
and former Subsidiaries, any other affiliate of the Company and their respective
predecessors (collectively, the "Company Affiliated Group") prior to the
Effective Time for purposes of eligibility and vesting (but not benefit accrual)
to the extent that prior service with Parent or its Subsidiaries is recognized
in respect of employees other than the employees of the Company Affiliated
Group. Any employee benefit plan which provides medical, dental or life
insurance benefits after the Effective Time to any individual who is a current
or former employee of the Company Affiliated Group as of the Effective Time or a
dependent thereof shall, with respect to such
 
                                      A-28
<PAGE>   157
 
individuals, waive any waiting periods and any pre-existing conditions and
actively-at-work exclusions to the extent so waived under present policy of the
Company Affiliated Group and shall provide that any expenses incurred on or
before the Effective Time by such individuals shall be taken into account under
such plans for purposes of satisfying applicable deductible or coinsurance
provisions to the extent taken into account under present policy of the Company
Affiliated Group.
 
     (d) The Company shall amend all trusts and other funding arrangements
(including but not limited to the Change in Control Benefits Trust Agreement
entered into by the Company and The Chase Manhattan Bank) to the extent
necessary to provide that no event which occurs in connection with the
transactions contemplated by this Agreement shall require the Company, the
Surviving Corporation, or any of their affiliates to make any payment of cash or
other property to any such trust or funding arrangement.
 
                                   ARTICLE VI
 
                            CONDITIONS TO THE MERGER
 
     SECTION 6.1. Conditions to Each Party's Obligation to Effect the
Merger. The respective obligations of each party to effect the Merger shall be
subject to the fulfillment at or prior to the Closing Date (or waiver by the
party for whose benefit the applicable condition exists) of the following
conditions:
 
     (a) The holders of the issued and outstanding Shares shall have duly
approved this Agreement and the Merger, and the holders of the issued and
outstanding shares of Parent Common Stock shall have duly approved the Parent
Stockholder Proposal, all in accordance with applicable Law, the respective
certificates of incorporation and bylaws of the Company and Parent, and the
rules of the NYSE.
 
     (b) The Registration Statement shall have become effective in accordance
with the provisions of the Securities Act and no stop order suspending such
effectiveness shall have been issued and remain in effect and no proceedings for
that purpose shall have been initiated or threatened by the SEC or any other
Governmental Entity.
 
     (c) The shares of Parent Common Stock issuable in the Merger shall have
been approved for listing on the NYSE, subject only to official notice of
issuance.
 
     (d) All regulatory approvals required to consummate the transactions
contemplated hereby shall have been obtained and shall be in full force and
effect and all statutory waiting periods in respect thereof shall have expired
or been terminated, other than any such regulatory approvals the failure to
obtain which are not reasonably likely, individually, in the aggregate or
together with all other existing facts, events and circumstances, to result in
any Material Adverse Effect on the Company (in the case of Parent's obligation
to close) or on Parent (in the case of the Company's obligation to close).
 
     (e) No Law or Decree shall have been enacted, entered, promulgated, or
enforced by any court or other tribunal or Governmental Entity which prohibits
or makes illegal the consummation of any of the transactions contemplated
hereby. In the event any such Decree shall have been issued, each party shall
use its reasonable efforts to remove any such Decree.
 
     (f) The Company shall have received from Wachtell, Lipton, Rosen & Katz (in
the case of the Company's obligation to close) and Parent shall have received
from Fried, Frank, Harris, Shriver & Jacobson (in the case of Parent's
obligation to close), dated the Closing Date, (i) opinions in the form of
Exhibit B (in the case of the Company) and Exhibit C (in the case of Parent) or
(ii) if applicable, an Alternate Legal Opinion. In rendering such opinions,
Wachtell, Lipton Rosen & Katz and Fried, Frank, Harris, Shriver & Jacobson may
require and rely upon representations and covenants, including those contained
in certificates of officers of the Company, Parent and Merger Sub, which
representations and covenants are in form and substance reasonably satisfactory
to such counsel.
 
     SECTION 6.2. Conditions to Obligations of the Company to Effect the
Merger. The obligation of the Company to effect the Merger is further subject to
the conditions that (a) the representations and warranties of Parent contained
herein (which for purposes of this clause (a) shall be read as though none of
them
 
                                      A-29
<PAGE>   158
 
contained any Material Adverse Effect or materiality qualification) shall be
true and correct in all respects as of the Closing Date with the same effect as
though made as of the Closing Date (provided that any representations and
warranties made as of a specified date shall be required only to continue on the
Closing Date to be true and correct as of such specified date) except (i) for
changes specifically permitted by the terms of this Agreement and (ii) where the
failure of the representations and warranties to be true and correct in all
respects would not in the aggregate have a Material Adverse Effect on Parent;
(b) Parent shall have in all material respects performed all obligations and
complied with all covenants required by this Agreement to be performed or
complied with by it at or prior to the Closing Date, (c) each of the
representations and warranties of Parent contained in Sections 4.15(b) and (c)
shall be true and correct as of the Closing Date in all respects with the same
effect as though such representations and warranties had been made at the
Closing Date; and (d) Parent shall have delivered to the Company a certificate,
dated the Closing Date and signed by its Chief Executive Officer or a Vice
President, certifying the satisfaction of the conditions set forth in the
foregoing clauses (a) through (c).
 
     SECTION 6.3. Conditions to Obligations of Parent to Effect the Merger. The
obligation of Parent to effect the Merger is further subject to the conditions
that (a) the representations and warranties of the Company contained herein
(which for purposes of this clause (a) shall be read as though none of them
contained any Material Adverse Effect or materiality qualification) shall be
true and correct in all respects as of the Closing Date with the same effect as
though made as of the Closing Date (provided that any representations and
warranties made as of a specified date shall be required only to continue on the
Closing Date to be true and correct as of such specified date) except (i) for
changes specifically permitted by the terms of this Agreement and (ii) where the
failure of the representations and warranties to be true and correct in all
respects would not in the aggregate have a Material Adverse Effect on the
Company; (b) the Company shall have in all material respects performed all
obligations and complied with all covenants required by this Agreement to be
performed or complied with by it at or prior to the Closing Date; (c) each of
the representations and warranties of the Company contained in Section 3.15(b)
and (c) shall be true and correct as of the Closing Date in all respects with
the same effect as though such representations and warranties had been made at
the Closing Date; and (d) the Company shall have delivered to Parent a
certificate, dated the Closing Date and signed by its Chief Executive Officer
and President or a Vice President, certifying the satisfaction of the conditions
set forth in the foregoing clauses (a) through (c).
 
                                  ARTICLE VII
 
                   TERMINATION, WAIVER, AMENDMENT AND CLOSING
 
     SECTION 7.1. Termination or Abandonment. This Agreement may be terminated
and the Merger may be abandoned at any time prior to the Effective Time
(notwithstanding any approval of this Agreement by the shareholders of the
Company or any Parent Stockholder Approval):
 
     (a) by mutual written consent of Parent and the Company;
 
     (b) by either Parent or the Company if the Merger shall not have been
consummated before December 31, 1998; provided, however, that the right to
terminate this Agreement under this Section 7.1(b) shall not be available to any
party whose failure to perform any covenant or obligation under this Agreement
has been the cause of or resulted in the failure of the Merger to occur on or
before such date;
 
     (c) by Parent if (i) the Board of Directors of the Company shall or shall
resolve to (A) withdraw the Company Board Recommendation, (B) modify such
recommendation in a manner adverse to Parent or Merger Sub or refuse to affirm
the Company Board Recommendation as promptly as practicable (but in any case
within 10 business days) after receipt of any written request from Parent which
request was made on a reasonable basis, or (C) approve or recommend any proposed
Company Business Combination (as defined in Section 7.3(e)), or (ii) the Company
has failed, as promptly as practicable after the Registration Statement is
declared effective by the SEC, to call the Company Meeting or to mail the Joint
Proxy Statement to its shareholders, or failed to include in such statement the
Company Board Recommendation;
 
                                      A-30
<PAGE>   159
 
     (d) by the Company if (i) the Board of Directors of Parent shall or shall
resolve to (A) withdraw the Parent Board Recommendation, (B) modify such
recommendation in a manner adverse to the Company or refuse to affirm the Parent
Board Recommendation as promptly as practicable (but in any case within 10
business days) after receipt of any written request from the Company which
request was made on a reasonable basis, or (C) approve or recommend any proposed
Parent Business Combination (as defined in Section 7.3(f)), or (ii) Parent has
failed, as promptly as practicable after the Registration Statement is declared
effective by the SEC, to call the Parent Meeting or to mail the Joint Proxy
Statement to its shareholders, or failed to include in such statement the Parent
Board Recommendation;
 
     (e) by Parent or the Company if at the Company Meeting (including any
adjournment or postponement thereof) the requisite vote of the shareholders of
the Company to approve this Agreement and the Merger shall not have been
obtained;
 
     (f) by Parent or the Company if at the Parent Meeting (including any
adjournment or postponement thereof) the Parent Stockholder Approval shall not
have been obtained;
 
     (g) by either the Company or Parent, if there shall be any Law or Decree
that prohibits or makes illegal consummation of the Merger or if any Decree
enjoining Parent or the Company from consummating the Merger is entered and such
Decree shall become final and nonappealable;
 
     (h) by Parent or the Company if there shall have been a material breach by
the other of any of its representations, warranties, covenants or agreements
contained in this Agreement, which breach would result in the failure to satisfy
one or more of the conditions set forth in Section 6.2 (in the case of a breach
by Parent) or Section 6.3 (in the case of a breach by the Company), and such
breach shall be incapable of being cured or, if capable of being cured, shall
not have been cured within 30 days after written notice thereof shall have been
received by the party alleged to be in breach; or
 
     (i) by the Company pursuant to, but only in compliance with, Section 5.8.
 
     SECTION 7.2. Effect of Termination. In the event of the termination of this
Agreement pursuant to Section 7.1, this Agreement, except for the provisions of
the second sentence of Section 5.2, this Section 7.2 and Sections 7.3, 8.2 and
8.4 shall become void and have no effect, without any liability on the part of
any party or any of its affiliates. Notwithstanding the foregoing, nothing in
this Section 7.2 shall relieve any party to this Agreement of liability for any
willful breach of any provision of this Agreement.
 
     SECTION 7.3. Termination Payments. (a) Upon the happening of a Company
Triggering Event, the Company shall pay to Parent (or to any Subsidiary of
Parent designated in writing by Parent to the Company) the amount of $60 million
(the "Company Termination Fee") (less any Expense Fee that may previously have
been paid or is payable in the same circumstances), by wire transfer of
immediately available funds (1) on the second business day after such
termination in the case of clause (i) of the definition of Company Triggering
Event, (2) on or prior to the date of such termination, in the case of clause
(iii) of the definition of Company Triggering Event, or (3) on the earlier of
the date an agreement is entered into with respect to a Company Business
Combination or a Company Business Combination is consummated, in the case of
clauses (ii) or (iv) of the definition of Company Triggering Event. In no event
shall more than one Company Termination Fee be payable under this Agreement.
"Company Triggering Event" means any one of the following:
 
          (i) a termination of this Agreement by Parent pursuant to Section
     7.1(c);
 
          (ii) a termination of this Agreement by Parent or the Company pursuant
     to Section 7.1(e), if (A) any Company Business Combination is publicly
     proposed or announced on or after the date hereof and prior to the Company
     Meeting and (B) any Company Business Combination is entered into, agreed to
     or consummated by the Company or any of its Subsidiaries within 12 months
     of such termination of this Agreement;
 
          (iii) a termination of this Agreement by the Company pursuant to
     Section 7.1(i); or
 
                                      A-31
<PAGE>   160
 
          (iv) a termination of this Agreement by Parent or the Company pursuant
     to Section 7.1(e) or by Parent pursuant to Section 7.1(h) (but only if the
     breach of warranty, representation, covenant or agreement that gives rise
     to such termination arises out of bad faith or willful misconduct of the
     Company), if any Company Business Combination is entered into, agreed to or
     consummated by the Company within 3 months of such termination of this
     Agreement.
 
     (b) Upon the happening of a Parent Triggering Event, Parent shall pay to
the Company (or to any Subsidiary of the Company designated in writing by the
Company to Parent) the amount of $25 million (the "Parent Termination Fee")
(less any Expense Fee that may previously have been paid or is payable in the
same circumstances) by wire transfer of immediately available funds, (1) on the
second business day following such termination, in the case of clause (i) of the
definition of Parent Triggering Event, or (2) on the earlier of the date an
agreement is entered into with respect to a Parent Business Combination or a
Parent Business Combination is consummated, in the case of clause (ii) of the
definition of Parent Triggering Event. In no event shall more than one Parent
Termination Fee be payable under this Agreement. "Parent Triggering Event" means
either of the following:
 
          (i) a termination of this Agreement by the Company pursuant to Section
     7.1(d); or
 
          (ii) a termination of this Agreement by Parent or the Company pursuant
     to Section 7.1(f), if (A) any Parent Business Combination with a person
     other than the Company is publicly proposed or announced on or after the
     date hereof and prior to the Parent Meeting and (B) a Parent Business
     Combination is entered into, agreed to or consummated by Parent or any of
     its Subsidiaries with such person or an affiliate thereof within 12 months
     of the termination of this Agreement.
 
     (c) Notwithstanding Section 8.2:
 
          (i) If this Agreement is terminated by Parent or the Company pursuant
     to Section 7.1(e), then the Company shall pay to Parent, and if this
     Agreement is terminated by Parent or the Company pursuant to Section
     7.1(f), then Parent shall pay to the Company (or, in each case, to any
     Subsidiary thereof designated in writing to the payor), on the second
     business day after such termination, by wire transfer of immediately
     available funds, the amount of $5 million (the "Expense Fee") representing
     the cash amount necessary to compensate the payee for all fees and expenses
     incurred at any time prior to such termination by it or on its behalf in
     connection with the Merger, the preparation of this Agreement and the
     transactions contemplated by this Agreement.
 
          (ii) The Company shall pay to Parent (or to any Subsidiary of Parent
     designated in writing to the Company), on the second business day after the
     Company receives a reasonably documented statement therefor (a letter from
     the lenders being conclusive in the absence of manifest error), by wire
     transfer of immediately available funds, all amounts incurred by Parent and
     Merger Sub in respect of underwriting, placement, commitment and other fees
     and payments (including any payment based on a percentage of the Company
     Termination Fee, if any, required to be paid by the Company) not to exceed
     the amounts set forth in that certain fee letter dated the date hereof with
     respect to the Financing Commitments, and related expenses of the lenders
     (including fees and expenses of lenders' counsel) required to be paid by
     Parent or Merger Sub in connection with the obtaining of the Financing
     Commitments (the "Commitment Expenses"), if this Agreement is terminated:
     (A) by Parent pursuant to Section 7.1(c) or 7.1(h); (B) by Parent or the
     Company pursuant to Section 7.1(e); or (C) by the Company pursuant to
     Section 7.1(i).
 
          (iii) The Company shall pay to Parent (or to any Subsidiary of Parent
     designated in writing to the Company), on the second business day after the
     Company receives a reasonably documented statement therefor (a letter from
     the lenders being conclusive in the absence of manifest error), by wire
     transfer of immediately available funds, the lesser of (x) one-half of the
     Commitment Expenses or (y) $5 million, if this Agreement is terminated by
     Parent or the Company pursuant to Section 7.1(b) or 7.1(g).
 
     (d) The parties acknowledge that the agreements contained in paragraphs (a)
through (c) of this Section 7.3 are an integral part of the transactions
contemplated by this Agreement, and that, without these agreements, they would
not enter into this Agreement; accordingly, if either of the Company or Parent
fails to
 
                                      A-32
<PAGE>   161
 
pay promptly any fee payable by it pursuant to this Section 7.3, then the party
owing such fee shall pay to the party owed such fee its costs and expenses
(including attorneys' fees) in connection with such suit, together with interest
on the amount of the fee at the prime or base rate of The Chase Manhattan Bank
from the date such payment was due under this Agreement until the date of
payment.
 
     (e) "Company Business Combination" shall mean:
 
          (i) any merger, consolidation or other business combination as a
     result of which the shareholders of the Company would hold less than 50% of
     the voting securities outstanding following that transaction;
 
          (ii) the acquisition of 50% or more of the outstanding capital stock
     of the Company; or
 
          (iii) the acquisition of 50% or more of the assets of the Company and
     its Subsidiaries taken as a whole (including capital stock of any
     Subsidiary);
 
provided that solely for purposes of clause (ii)(A) of Section 7.3(a), the
percentage in clause (i) of this definition shall be deemed to be 75% and the
percentage in clauses (ii) and (iii) of this definition shall be deemed to be
25%.
 
     (f) "Parent Business Combination" shall mean:
 
          (i) any merger, consolidation or other business combination as a
     result of which the stockholders of Parent would hold less than 50% of the
     voting securities outstanding following that transaction;
 
          (ii) the acquisition of 50% or more of the outstanding capital stock
     of Parent; or
 
          (iii) the acquisition of 50% or more of the assets of Parent and its
     Subsidiaries taken as a whole (including capital stock of any Subsidiary);
 
provided that solely for purposes of clause (ii)(A) of Section 7.3(b), the
percentage in clause (i) of this definition shall be deemed to be 75% and the
percentage in clauses (ii) and (iii) of this definition shall be deemed to be
25%.
 
                                  ARTICLE VIII
 
                                 MISCELLANEOUS
 
     SECTION 8.1. No Survival of Representations and Warranties. None of the
representations, warranties and agreements in this Agreement or in any
instrument delivered pursuant to this Agreement shall survive the Merger, except
for the agreements set forth in Article II, the provisions of Section 5.10,
Section 5.13 and this Section 8.1.
 
     SECTION 8.2. Expenses. Subject to the provisions of Section 7.3, (a)
whether or not the Merger is consummated, all costs and expenses incurred in
connection with this Agreement and the transactions contemplated hereby and
thereby shall be paid by the party incurring such expenses, except that the
expenses incurred in connection with the filing, printing and mailing of the
Registration Statement and the Joint Proxy Statement (including registration and
filing fees relating thereto) shall be shared equally by the Company and Parent
and (b) if the Merger is consummated, all transfer taxes shall be paid by the
Company.
 
     SECTION 8.3. Counterparts; Effectiveness. This Agreement may be executed in
two or more consecutive counterparts, each of which shall be an original, with
the same effect as if the signatures thereto and hereto were upon the same
instrument, and shall become effective when one or more counterparts have been
signed by each of the parties and delivered (by telecopy or otherwise) to the
other parties.
 
     SECTION 8.4. Governing Law. This Agreement shall be governed by and
construed in accordance with the Laws of the State of New York, except that New
York Law and Delaware Law shall apply to the Merger, in each case, without
regard to the principles of conflicts of Laws thereof.
 
     SECTION 8.5. Notices. All notices and other communications hereunder shall
be in writing (including telecopy or similar writing) and shall be effective (a)
if given by telecopy, when such telecopy is transmitted
 
                                      A-33
<PAGE>   162
 
to the telecopy number specified in this Section 8.5 and the appropriate
telecopy confirmation is received or (b) if given by any other means, when
delivered at the address specified in this Section 8.5:
 
        To the Company or MergerSub:
 
          General Signal Corporation
           One High Ridge Park
           P.O. Box 10010
           Stamford, Connecticut 06904-2010
           Attention: Joanne L. Bober
                      Senior Vice President, General Counsel and Secretary
           Telecopier: (203) 329-4396
 
        copy to:
 
          Wachtell, Lipton, Rosen & Katz
          51 West 52nd Street
          New York, New York 10019-6150
          Attention: Eric S. Robinson, Esq.
          Telecopier: (212) 403-2000
 
        To Parent:
 
          SPX Corporation
           700 Terrace Point Drive
           P.O. Box 3301
           Muskegon, Michigan 49443-3301
           Attention: Christopher J. Kearney
                      Senior Vice President, General Counsel and Secretary
               Telecopier: (616) 724-5940
 
        copy to:
 
          Fried, Frank, Harris, Shriver & Jacobson
          One New York Plaza
          New York, New York 10004-1980
          Attention: Aviva Diamant, Esq.
          Telecopier: (212) 859-4000
 
     SECTION 8.6. Assignment; Binding Effect. Except as may be required by any
Alternative Transaction adopted pursuant to Section 1.7, neither this Agreement
nor any of the rights, interests or obligations hereunder shall be assigned by
any of the parties hereto (whether by operation of Law or otherwise) without the
prior written consent of the other parties; provided however, that MergerSub may
assign all of its rights and obligations under this Agreement and the
transactions contemplated hereby to any other wholly owned Subsidiary of Parent.
Subject to the preceding sentence, this Agreement shall be binding upon and
shall inure to the benefit of the parties hereto and their respective successors
and assigns.
 
     SECTION 8.7. Severability. Any term or provision of this Agreement which is
invalid or unenforceable in any jurisdiction shall, as to that jurisdiction, be
ineffective to the extent of such invalidity or unenforceability without
rendering invalid or unenforceable the remaining terms and provisions of this
Agreement in any other jurisdiction. If any provision of this Agreement is so
broad as to be unenforceable, such provision shall be interpreted to be only so
broad as is enforceable.
 
     SECTION 8.8. Enforcement of Agreement. The parties hereto agree that money
damages or other remedy at Law would not be sufficient or adequate remedy for
any breach or violation of, or a default under, this Agreement by them and that
in addition to all other remedies available to them, each of them shall be
entitled to the fullest extent permitted by Law to an injunction restraining
such breach, violation or default or
 
                                      A-34
<PAGE>   163
 
threatened breach, violation or default and to any other equitable relief,
including, without limitation, specific performance, without bond or other
security being required.
 
     SECTION 8.9. Miscellaneous. This Agreement:
 
          (a) along with the Confidentiality Agreements, Exhibits and Disclosure
     Letters hereto, constitutes the entire agreement, and supersedes all other
     prior agreements and understandings, both written and oral, between the
     parties, or any of them, with respect to the subject matter hereof and
     thereof; and
 
          (b) except for the provisions of Section 5.10, is not intended to and
     shall not confer upon any person other than the parties hereto any rights
     or remedies hereunder.
 
     SECTION 8.10. Headings. Headings of the Articles and Sections of this
Agreement are for convenience of the parties only, and shall be given no
substantive or interpretive effect whatsoever.
 
     SECTION 8.11. Certain Definitions. References in this Agreement to
"Subsidiaries" of the Company or Parent shall mean any corporation or other form
of legal entity of which more than 50% of the outstanding voting securities are
on the date hereof directly or indirectly owned by the Company or Parent, as the
case may be. References in this Agreement (except as specifically otherwise
defined) to "affiliates" shall mean, as to any person, any other person which,
directly or indirectly, controls, or is controlled by, or is under common
control with, such person. As used in this definition, "control" (including,
with its correlative meanings, "controlled by" and "under common control with")
shall mean the possession, directly or indirectly, of the power to direct or
cause the direction of management or policies of a person, whether through the
ownership of securities or partnership of other ownership interests, by contract
or otherwise. References in the Agreement to "person" shall mean an individual,
a corporation, a partnership, an association, a trust or any other entity or
organization, including, without limitation, a governmental body or authority.
"U.S. Subsidiary" shall mean a Subsidiary organized under the laws of any state
of the United States or the District of Columbia.
 
     SECTION 8.12. Knowledge. Reference to the "knowledge" of any person that is
not an individual shall be to the knowledge of the executive officers of such
person and, with respect to representations and warranties made or deemed to be
made as of the Closing Date, unless expressly limited to a specified date of
this Agreement, shall include knowledge obtained at any time after the date
hereof and prior to the Closing Date.
 
     IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
duly executed and delivered as of the date first above written.
 
                                          SPX CORPORATION
 
                                          By:  /s/ CHRISTOPHER J. KEARNEY
 
                                            ------------------------------------
                                            Name: Christopher J. Kearney
                                            Title:  Vice President, Secretary
                                                    and General Counsel
 
                                          SAC CORP.
                                          By:  /s/ CHRISTOPHER J. KEARNEY
 
                                            ------------------------------------
                                            Name: Christopher J. Kearney
                                            Title:  Vice President and Secretary
 
                                          GENERAL SIGNAL CORPORATION
 
                                          By:    /s/ MICHAEL D. LOCKHART
 
                                            ------------------------------------
                                            Name: Michael D. Lockhart
                                            Title:  Chairman, President and
                                                    Chief Executive Officer
 
                                      A-35
<PAGE>   164
 
                                                                      APPENDIX B
 
                         OPINION OF STERN STEWART & CO.
<PAGE>   165
 
                                                                   July 19, 1998
 
The Board of Directors
SPX Corporation
700 Terrace Point Drive
Muskegon, Michigan 49443
 
Attention: Mr. John B. Blystone
        President, Chief Executive Officer
        and Chairman of the Board
 
Gentlemen and Madam:
 
     You have requested our opinion as to the fairness, from a financial point
of view, to SPX Corporation ("SPX" or "the Company") of the consideration to be
paid by the Company in the proposed acquisition of General Signal Corporation
("General Signal"), pursuant to the Agreement and Plan of Merger, dated as of
July 19, 1998, among SPX, SAC Corp., a wholly owned subsidiary of SPX, and
General Signal (the "Definitive Agreement"). Pursuant to the Definitive
Agreement, General Signal will be merged with and into SAC Corp., and each
outstanding share of General Signal common stock will be converted into, subject
to the allocation and election procedures set forth in the Definitive Agreement,
(i) $45.00 in cash, or (ii) 0.4186 shares of SPX common stock and $18.00 in
cash, or (iii) 0.6977 shares of SPX common stock (the "Merger Consideration").
 
     Stern Stewart & Co., as part of its corporate financial advisory business,
is regularly engaged in the valuation of businesses and their securities in
connection with mergers and acquisitions. We presently are serving as financial
advisor to SPX and will receive a fee for rendering this opinion. We previously
have advised the management and the Board of Directors of the Company with
respect to financial strategy and dividend policy, and the leveraged stock
repurchase that was executed in April 1997.
 
     In connection with our opinion, we have reviewed financial and other
information that was furnished to us by the Company, including information
provided during discussions with management and forward-looking projections. Our
valuation calculations were based upon Stern Stewart's proprietary EVA(R)
valuation methodology and discounted cash flow analysis. In addition, we have
compared certain financial data of General Signal with various other companies
whose securities are publicly traded, reviewed prices and premiums paid in other
similar transactions, and conducted such other financial studies, analyses and
investigations as we deemed appropriate for purposes of this opinion. Such other
studies included a comparison of the historical stock price performance of
General Signal with selected peer companies and with the Standard & Poor's 500
Index, and a calculation of the implied growth value in the present stock price
of General Signal, as well as the proposed purchase price, and a comparison of
such findings to similar analyses of the peer companies' market capitalizations.
We have not made an independent evaluation or appraisal of any of the assets or
liabilities of General Signal, nor have we been furnished with such appraisals.
 
     In rendering this opinion, we have relied, without independent
verification, on the accuracy and completeness of all financial and other
information that was furnished or otherwise communicated to us by the Company.
With respect to the financial information and forecasts examined by us, we have
assumed that they were reasonably prepared on bases reflecting the best
currently available estimates and good faith judgement of SPX's management as to
the future performance of General Signal.
 
     On the basis of and subject to the foregoing, as of the date hereof, it is
our opinion that the aggregate Merger Consideration to be paid in the
acquisition of General Signal is fair, from a financial point of view, to SPX.
 
                                       Sincerely yours,
 
                                       STERN STEWART & CO.
 
                                       By: /s/ DENNIS SOTER
 
                                         ---------------------------------------
                                              Dennis Soter
                                            Partner
 
                                       B-1
<PAGE>   166
 
                                                                      APPENDIX C
 
   
                       OPINION OF LAZARD FRERES & CO. LLC
    
<PAGE>   167
 
                                                                   July 19, 1998
 
The Board of Directors
General Signal Corporation
One High Ridge Park
P.O. Box 10010
Stamford, CT 06904
 
Dear Members of the Board:
 
     We understand that General Signal Corporation ("GSX") and SPX Corporation
("SPX") have entered into an Agreement and Plan of Merger dated as of July 19,
1998 (the "Agreement"), pursuant to which GSX will merge with and into a
subsidiary of SPX (the "Merger") for a combination of shares of SPX Common Stock
and cash. Pursuant to the Agreement, subject to proration, each share of GSX
Common Stock will be converted into either (i) 0.6977 of a share of SPX Common
Stock together with related rights, (ii) $45.00 in cash or (iii) 0.4186 of a
share of SPX Common Stock and related rights and $18.00 in cash (collectively,
the "Merger Consideration").
 
     You have requested our opinion as to the fairness, from a financial point
of view, to the holders of shares of GSX Common Stock of the aggregate Merger
Consideration. In connection with this opinion, we have:
 
       (i) Reviewed the financial terms and conditions of the Agreement;
 
      (ii) Analyzed certain historical business and financial information
           relating to GSX and SPX;
 
      (iii) Reviewed various financial forecasts and other data provided to us
            by GSX and SPX relating to their respective businesses;
 
      (iv) Held discussions with members of the senior managements of GSX and
           SPX with respect to the businesses and prospects of GSX and SPX,
           respectively, the strategic objectives of each, and possible benefits
           which might be realized following the Merger;
 
       (v) Reviewed public information with respect to certain other companies
           in lines of businesses we believe to be generally comparable to the
           businesses of GSX and SPX;
 
      (vi) Reviewed the financial terms of certain business combinations
           involving companies in lines of businesses we believe to be generally
           comparable to those of GSX and SPX, and in other industries
           generally;
 
      (vii) Reviewed the historical stock prices and trading volumes of the
            shares of GSX Common Stock and the shares of SPX Common Stock; and
 
     (viii) Conducted such other financial studies, analyses and investigations
            as we deemed appropriate.
 
     We have relied upon the accuracy and completeness of the foregoing
information, and have not assumed any responsibility for any independent
verification of such information or any independent valuation or appraisal of
any of the assets or liabilities of GSX or SPX, or concerning the solvency of,
or other related solvency issues with respect to, either of the foregoing
entities. With respect to financial forecasts, including the potential benefits
projected to be realized following the Merger, we have assumed that they have
been reasonably prepared on bases reflecting the best currently available
estimates and judgments of management of GSX and SPX as to the future financial
performance of GSX and SPX, respectively. We assume no responsibility for and
express no view as to such forecasts or the assumptions on which they are based.
In addition, we are not expressing any opinion as to the prices at which shares
of SPX Common Stock may trade following the date of this opinion.
 
     Further, our opinion is necessarily based on accounting standards,
economic, monetary, market and other conditions as in effect on, and the
information made available to us as of, the date hereof.
 
     In rendering our opinion, we have assumed that the Merger will be
consummated on the terms described in the Agreement, without any waiver of any
material terms or conditions by GSX, that the Merger will be
 
                                       C-1
<PAGE>   168
 
consummated using reverse purchase accounting, and that obtaining the necessary
regulatory approvals for the Merger will not have an adverse effect on GSX or
SPX.
 
     We are acting as investment banker to GSX in connection with the Merger and
will receive a fee for our services, a substantial portion of which is
contingent upon consummation of the Merger. We have in the past provided, and
are currently providing, investment banking services to GSX for which we have
received and anticipate receiving customary fees.
 
     Our engagement and the opinion expressed herein are for the benefit of the
Board of Directors of GSX and our opinion is rendered to GSX's Board in
connection with its consideration of the Merger.
 
     This opinion is not intended to and does not constitute a recommendation to
any holder of shares of GSX Common Stock as to whether such stockholder should
vote for the Merger or with regard to any election of alternative forms of
Merger Consideration. It is understood that this letter may not be disclosed or
otherwise referred to without our prior consent, except as may otherwise be
required by law or by a court of competent jurisdiction; provided, however, that
this opinion may be reproduced in full in the Proxy Statement of GSX relating to
a vote of the holders of GSX Common Stock with respect to the Agreement.
 
     Based on and subject to the foregoing, we are of the opinion that, as of
the date hereof, the aggregate Merger Consideration is fair to the holders of
shares of GSX Common Stock from a financial point of view.
 
                                          Very truly yours,
 
   
                                          LAZARD FRERES & CO. LLC
    
 
                                          By /s/ J. ROBERT LOVEJOY
                                            ------------------------------------
                                                 J. Robert Lovejoy
                                                 Managing Director
   
                                       C-2
<PAGE>   169
 
   
                                                                      APPENDIX D
    
 
   
                                SPX CORPORATION
    
   
                          1992 STOCK COMPENSATION PLAN
    
<PAGE>   170
 
   
                                SPX CORPORATION
    
   
                          1992 STOCK COMPENSATION PLAN
    
   
               (AMENDED AND RESTATED EFFECTIVE DECEMBER 10, 1997)
    
   
                 (AS FURTHER AMENDED EFFECTIVE AUGUST 26, 1998)
    
 
   
SECTION 1. ESTABLISHMENT, PURPOSES AND EFFECTIVE DATE OF PLAN
    
 
   
     1.1. Establishment. SPX Corporation, a Delaware corporation, has
established the "1992 Stock Compensation Plan" (the "Plan"). The Plan, which
originally amended and restated the prior "Stock Compensation Plan," permits the
awarding of Nonqualified Stock Options, Incentive Stock Options, Stock
Appreciation Rights, Restricted Stock and Performance Units.
    
 
   
     1.2. Purposes. The purpose of the Plan is to advance the interests of the
Company and its Subsidiaries and divisions by (a) encouraging and providing for
the acquisition of equity interests in the Company by Key Employees, thereby
increasing the stake in the future growth and prosperity of the Company, and
furthering Key Employees' identity of interest with those of the Company's
shareholders, and (b) enabling the Company to compete with other organizations
in attracting, retaining, promoting and rewarding the services of Key Employees.
    
 
   
     1.3. Effective Dates. On April 28, 1993, the Company's shareholders
approved the adoption of the Plan effective as of December 15, 1992. On December
11, 1996, the Board adopted certain amendments to the Plan, which were approved
by the Company's shareholders on April 23, 1997. Effective December 10, 1997,
the Plan is amended and restated, as set forth herein and as approved by the
Board on December 10, 1997. On August 26, 1998, the Board adopted an amendment
to the Plan, which was approved by the Company's shareholders on               ,
1998.
    
 
   
SECTION 2. DEFINITIONS
    
 
   
     2.1. Definitions. Whenever used herein, the following terms shall have
their respective meanings set forth below:
    
 
   
          (a) "Board" means the Board of Directors of the Company.
    
 
   
          (b) "Code" means the Internal Revenue Code of 1986, as amended.
    
 
   
          (c) "Committee" means the Compensation Committee of the Board, which
     shall consist of not less than three persons appointed by the Board from
     among those Board members who are not employees of the Company or any of
     its subsidiaries or divisions. The Committee shall administer the Plan
     pursuant to the provisions of Section 4.
    
 
   
          (d) "Common Stock" means the Common Stock, par value $10.00, of the
     Company or such other class of shares or other securities as may be
     applicable pursuant to the provisions of Subsection 5.3.
    
 
   
          (e) "Company" means SPX Corporation, a Delaware corporation.
    
 
   
          (f) "Fair Market Value" means, as to any date, the fair market value
     of Common Stock determined by such methods or procedures as shall be
     established from time to time by the Committee or, if not otherwise
     determined, fair market value means the closing price of a share of Common
     Stock as reported in the "NYSE-Composite Transactions" section of the
     Midwest Edition of The Wall Street Journal for such date (or, if no prices
     are quoted for such date, on the next preceding date on which such prices
     of Common Stock are so quoted).
    
 
   
          (g) "Key Employee" means an employee of the Company or of a
     Subsidiary, including an officer or director, who, in the opinion of the
     Committee, can contribute significantly to the growth and profitability of
     the Company or a Subsidiary. Key Employees also may include those employees
     identified by the Committee to be in situations of extraordinary
     performance, promotion, retention or recruitment. The awarding of a grant
     under this Plan to an employee by the Committee shall be deemed a
     determination by the Committee that such employee is a Key Employee.
    
 
                                       D-1
<PAGE>   171
 
   
          (h) "Mature Common Stock" means Common Stock that has been acquired by
     the holder thereof on the open market or that has been acquired pursuant to
     this Plan or another employee benefit arrangement of the Company and held
     for at least six months.
    
 
   
          (i) "Options" means the right to purchase stock at a stated price for
     a specified period of time. For purposes of the Plan an Option may be
     either (a) an "incentive stock option" within the meaning of Code Section
     422, or (b) a "nonqualified stock option" which is intended not to fall
     under the provisions of Code Section 422.
    
 
   
          (j) "Option Price" means the price at which each share of Common Stock
     subject to an Option may be purchased, determined in accordance with
     Subsection 7.3.
    
 
   
          (k) "Participant" means any individual designated by the Committee to
     participate in this Plan pursuant to Subsection 3.1.
    
 
   
          (1) "Period of Restriction" means the period during which the transfer
     of shares of Restricted Stock is restricted pursuant to Section 9.
    
 
   
          (m) "Restricted Stock" means the Common Stock granted to a Participant
     pursuant to Section 9.
    
 
   
          (n) "Stock Appreciation Right" means the right to receive a cash
     payment from the Company equal to the excess of the Fair Market Value of a
     share of Common Stock at the date of exercise of the Right over a specified
     price fixed by the Committee at grant (exercise price), which shall not be
     less than 100% of the Fair Market Value of the Common Stock on the date of
     grant. In the case of a Stock Appreciation Right which is granted in
     conjunction with an Option, the specified price shall be the Option Price.
    
 
   
          (o) "Subsidiary" means a corporation at least 50% or more of the
     voting power of which is owned, directly or indirectly, by the Company.
    
 
   
     2.2. Gender and Number. Except when otherwise indicated by the context,
words in the masculine gender when used in the Plan shall include the feminine
gender, the singular shall include the plural, and the plural shall include the
singular.
    
 
   
SECTION 3. ELIGIBILITY AND PARTICIPATION
    
 
   
     Participants in the Plan shall be selected by the Committee from among
those employees of the Company who are considered Key Employees.
    
 
   
SECTION 4. ADMINISTRATION
    
 
   
     4.1. Administration. The Plan shall be administered by a Committee to be
known as the "Compensation Committee," which shall consist of not less than
three directors of the Company designated by the Board; provided, however, that
no director who is an employee of the Company, a Subsidiary or a division shall
be appointed to the Committee. For purposes of any award granted under the Plan
by the Committee that is intended to be exempt from the restrictions of Section
16(b) of the Securities Exchange Act of 1934 (the "Act"), the Committee shall
consist only of directors who qualify as "non-employee directors," as defined in
Rule 16b-3 under the Act. For purposes of any award granted under the Plan by
the Committee that is intended to qualify for the performance-based compensation
exemption to the $1 million deductibility limit under Code Section 162(m), the
Committee shall consist only of directors who qualify as "outside directors," as
defined in Code Section 162(m) and the related regulations. A majority of the
members of the Committee shall constitute a quorum for the transaction of
business, and the vote of the majority of those members present at any meeting
shall decide any question brought before that meeting. In addition, the
Committee may take any action otherwise proper under the Plan by the unanimous
written consent of its members.
    
 
   
     The Committee may establish such rules and regulations, not inconsistent
with the provisions of the Plan, as it deems necessary to determine eligibility
to participate in the Plan and for the proper administration of the Plan, and
may amend or revoke any rule or regulation so established. The Committee may
make such
    
 
                                       D-2
<PAGE>   172
 
   
determinations and interpretations under or in connection with the Plan as it
deems necessary or advisable. All such rules, regulations, determinations and
interpretations shall be binding and conclusive upon the Company, its
Subsidiaries and divisions, its stockholders and all employees, and upon their
respective legal representatives, beneficiaries, successors and assigns, and
upon all other persons claiming under or through any of them.
    
 
   
SECTION 5. STOCK SUBJECT TO PLAN
    
 
   
     5.1. Number. The total number of shares of Common Stock of the Company
subject to issuance under the Plan, and subject to adjustment upon occurrence of
any of the events indicated in Subsection 5.3, may not exceed 3,000,000. Of this
total number, up to 200,000 shares of Common Stock may be granted to
Participants in the form of Restricted Stock. The shares to be delivered under
the Plan may consist, in whole or in part, of authorized but unissued stock or
treasury stock not reserved for any other purpose. The maximum aggregate number
of shares of Common Stock (including Options, Restricted Stock, Stock
Appreciation Rights and Performance Units to be paid out in shares of Common
Stock) that may be granted or that may vest with respect to awards granted in
any one fiscal year to a Participant shall be 100,000, subject to adjustment
upon the occurrence of any of the events indicated in Subsection 5.3.
    
 
   
     5.2. Unused Stock. In the event any shares of Common Stock that are subject
to an Option which, for any reason, expires, terminates or is canceled as to
such shares, or any shares of Common Stock subject to a Restricted Stock award
made under the Plan are reacquired by the Company pursuant to the Plan, or any
Stock Appreciation Right expires unexercised, such shares and rights again shall
become available for issuance under the Plan. Any shares of Common Stock
withheld or tendered to pay withholding taxes pursuant to Subsection 15.2 or
withheld or tendered in full or partial payment of the exercise price of an
Option pursuant to Subsection 7.6 shall again become available for issuance
under the Plan. In addition, all shares which reverted back to the Stock
Compensation Plan due to the expiration or termination of an award under the
terms of the Stock Compensation Plan or the 1982 Stock Option Plan have been
carried forward and are considered available for issuance under the terms of
this Plan.
    
 
   
     5.3. Adjustment in Capitalization. In the event of any change in the
outstanding shares of Common Stock that occurs after ratification of the Plan by
the shareholders of the Company by reason of a Common Stock dividend or split,
recapitalization, merger, consolidation, combination, exchange of shares, or
other similar corporate change, the aggregate number of shares of Common Stock
subject to each outstanding Option, and its stated Option Price, shall be
appropriately adjusted by the Committee, whose determination shall be
conclusive; provided, however, that fractional shares shall be rounded to the
nearest whole share. In such event, the Committee also shall have discretion to
make appropriate adjustments in the number and type of shares subject to
Restricted Stock grants then outstanding under the Plan pursuant to the terms of
such grants or otherwise. The Committee also shall make appropriate adjustments
in the number of outstanding Stock Appreciation Rights and Performance Units and
the related grant values.
    
 
   
SECTION 6. DURATION OF PLAN
    
 
   
     The Plan shall remain in effect, subject to the Board's right to earlier
terminate the Plan pursuant to Section 14 hereof, until all Common Stock subject
to it shall have been purchased or acquired pursuant to the provisions hereof.
However, no Option, Stock Appreciation Right, Restricted Stock or Performance
Unit may be granted under the Plan on or after December 15, 2002, which is the
tenth anniversary of the Plan's effective date.
    
 
   
SECTION 7. STOCK OPTIONS
    
 
   
     7.1. Grant of Options. Subject to the provisions of Sections 5 and 6,
Options may be granted to Participants at any time and from time to time as
shall be determined by the Committee. The Committee shall have complete
discretion in determining the number of Options granted to each Participant. The
Committee also shall determine whether an Option is an incentive stock option
within the meaning of Code Section 422, or a nonqualified stock option. However,
in no event shall the Fair Market Value (determined at the date of grant) of
Common Stock for which incentive stock options become exercisable for the first
time in
    
 
                                       D-3
<PAGE>   173
 
   
any calendar year exceed $100,000, computed in accordance with Code Section
422(b)(7). In addition, no incentive stock option shall be granted to any person
who owns, directly or indirectly, stock possessing more than 10% of the total
combined voting power of all classes of stock of the Company. Nothing in this
Section 7 shall be deemed to prevent the grant of nonqualified stock options in
excess of the maximum established by Code Section 422.
    
 
   
     7.2. Option Agreement. Each Option shall be evidenced by an Option
Agreement that shall specify the type of Option granted, the Option Price, the
duration of the Option, the number of shares of Common Stock to which the Option
pertains, and such other provisions as the Committee shall determine. The Option
Agreement shall specify whether the Option is intended to be an incentive stock
option within the meaning of Code Section 422, or a nonqualified stock option
which is intended not to fall under the provisions of Code Section 422.
    
 
   
     7.3. Option Price. The Option Price shall be determined by the Committee.
However, no Option granted pursuant to the Plan shall have an Option Price that
is less than the Fair Market Value of the Common Stock on the date the Option is
granted.
    
 
   
     7.4. Duration of Options. Each option shall expire at such time as the
Committee shall determine at the time it is granted, provided, however, that no
Option shall be exercisable later than the tenth anniversary of its grant date.
    
 
   
     7.5. Exercise of Options. Options granted under the Plan shall be
exercisable at such times and be subject to such restrictions and conditions as
the Committee shall in each instance approve, which need not be the same for all
Participants.
    
 
   
     7.6. Method of Exercise and Payment of Option Price. Options shall be
exercised pursuant to the methods and procedures as shall be established from
time to time by the Committee. The Committee shall determine the acceptable form
or forms and timing of payment of the Option Price. Acceptable forms of paying
the Option Price upon exercise of any Option shall include, but not be limited
to, (a) cash or its equivalent, (b) tendering shares of previously acquired
Common Stock having a Fair Market Value at the time of exercise equal to the
total Option Price, (c) directing the Company to withhold shares of Common
Stock, which may include attesting to the ownership of the equivalent number of
shares of previously-acquired Mature Common Stock having a Fair Market Value at
the time of exercise equal to the total Option Price, (d) other approved
property or (e) by a combination of (a), (b), (c) and/or (d). The proceeds from
such a payment shall be added to the general funds of the Company and shall be
used for general corporate purposes. As soon as practicable, after Option
exercise and payment, the Company shall deliver to the Participant Common Stock
certificates in an appropriate amount based upon the number of Options
exercised, issued in the Participant's name.
    
 
   
     7.7. Restrictions on Common Stock Transferability. The Committee shall
impose such restrictions on any shares of Common Stock acquired pursuant to the
exercise of an Option under the Plan as it may deem advisable, including,
without limitation, restrictions under applicable Federal securities law, under
the requirements of any stock exchange upon which such shares of Common Stock
are then listed and under any blue sky or state securities laws applicable to
such shares.
    
 
   
     7.8. Termination of Employment Due to Death, Disability or Retirement. In
the event the employment of a Participant is terminated by reason of death, any
outstanding Options shall become immediately fully vested and exercisable within
such period following the Participant's death as shall be determined by the
Committee, but in no event beyond the expiration of the term of the Option, by
such person or persons as shall have acquired the Participant's rights under the
Option by will or by the laws of descent and distribution. In the event the
employment of a Participant is terminated by reason of retirement or disability
(as such terms are defined under the applicable rules of the Company), any
outstanding Options shall become immediately fully vested and exercisable within
such period after such date of termination of employment as shall be determined
by the Committee, but in no event beyond the expiration of the term of the
Option.
    
 
   
     7.9. Termination of Employment Other Than for Death, Disability or
Retirement. If the employment of the Participant terminates for any reason other
than death, disability or retirement, the Participant shall
    
                                       D-4
<PAGE>   174
 
   
have the right to exercise the Option within such period after the date of his
termination as shall be determined by the Committee, but in no event beyond the
expiration of the term of the Option and only to the extent that the Participant
was entitled to exercise the Option at the date of his termination of
employment. Regardless of the reasons for termination of employment, incentive
stock options must be exercised within the Code Section 422 prescribed time
period in order to receive the favorable tax treatment applicable thereto.
    
 
   
     7.10. Nontransferability of Options. Except as provided in this Subsection
7.10, no Option granted under the Plan may be sold, transferred, pledged,
assigned or otherwise alienated or hypothecated, other than by will or by the
laws of descent and distribution, and all Options granted to a Participant under
the Plan shall be exercisable during his lifetime only by such Participant.
Under such rules and procedures as the Committee may establish, the holder of an
Option may transfer such Option to members of the holder's immediate family
(i.e., children, grandchildren and spouse) or to one or more trusts for the
benefit of such family members or to partnerships in which such family members
are the only partners, provided that (i) the agreement, if any, with respect to
such Option, expressly so permits or is amended to so permit, (ii) the holder
does not receive any consideration for such transfer, and (iii) the holder
provides such documentation or information concerning any such transfer or
transferee as the Committee may reasonably request. Any Options held by any
transferees shall be subject to the same terms and conditions that applied
immediately prior to their transfer. The Committee may also amend the agreements
applicable to any outstanding Options to permit such transfers. Any Option not
granted pursuant to any agreement expressly permitting its transfer or amended
expressly to permit its transfer shall not be transferable. Such transfer rights
shall in no event apply to any incentive stock option.
    
 
   
     7.11. Non-Qualified Replacement Options. The Committee may grant to any Key
Employee a replacement Option to purchase additional shares of Common Stock
equal to the number of shares delivered by the Key Employee and/or withheld by
the Company in satisfaction of the exercise price and/or tax withholding
obligations with respect to an Option. The terms of a replacement Option shall
be identical to the terms of the exercised Option, except that the exercise
price shall be not less than the Fair Market Value on the grant date of the
replacement Option. At the discretion of the Committee, the Option Agreement for
any Option under the Plan (including any previously granted and outstanding
nonqualified stock option, where the applicable Option Agreement is
appropriately amended) may provide for the automatic grant of such a replacement
Option or for the automatic grants of multiple replacement Options over the term
of the initial Option.
    
 
   
SECTION 8. STOCK APPRECIATION RIGHTS
    
 
   
     8.1. Grant of Stock Appreciation Rights. Subject to the terms and
provisions of this Plan, Stock Appreciation Rights may be granted to
Participants either independent of Options or in conjunction with nonqualified
stock options at any time and from time to time as shall be determined by the
Committee.
    
 
   
     8.2. Exercise of Stock Appreciation Rights Granted in Conjunction with a
Nonqualified Option. Stock Appreciation Rights granted in conjunction with a
nonqualified stock option may be exercised at any time during the life of the
related stock option, with a corresponding reduction in the number of shares
available under the Option. Option shares with respect to which the Stock
Appreciation Right shall have been exercised may not again be subject to an
Option under this Plan.
    
 
   
     8.3. Exercise of Stock Appreciation Rights Granted Independent of
Options. Stock Appreciation Rights granted independent of Options may be
exercised upon whatever terms and conditions the Committee, in its sole
discretion, imposes on the Stock Appreciation Right including, but not limited
to, a corresponding proportional reduction in previously granted Options.
    
 
   
     8.4. Payment of Stock Appreciation Right Amount. Upon exercise of a Stock
Appreciation Right, the holder shall be entitled to receive payment of an amount
(subject to Subsection 8.5 below) determined by multiplying:
    
 
   
          (a) The difference between the Fair Market Value of a share of Common
     Stock at the date of exercise over the price fixed by the Committee at the
     date of grant, by
    
 
                                       D-5
<PAGE>   175
 
   
          (b) The number of shares with respect to which the Stock Appreciation
     Right is exercised.
    
 
   
     8.5. Form of Payment. Payment to the Participant, upon the exercise of a
Stock Appreciation Right, will be made in cash.
    
 
   
     8.6. Limit on Appreciation. The Committee, in its sole discretion, may
establish (at the time of grant) a maximum amount per share which will be
payable upon exercise of a Stock Appreciation Right.
    
 
   
     8.7. Term of Stock Appreciation Right. The term of a Stock Appreciation
Right granted under the Plan shall not exceed ten years.
    
 
   
     8.8. Termination of Employment. In the event that the employment of a
Participant is terminated by reason of death, disability or retirement, or for
any other reason, the exercisability of any outstanding Stock Appreciation
Rights granted in conjunction with an Option shall terminate in the same manner
as specified for their related Options under Subsections 7.8 and 7.9. The
exercisability of any outstanding Stock Appreciation Rights granted independent
of Options also shall terminate in the manner provided under Subsections 7.8 and
7.9.
    
 
   
     8.9. Nontransferability of Stock Appreciation Rights. No Stock Appreciation
Right granted under the Plan may be sold, transferred, pledged, assigned or
otherwise alienated or hypothecated, other than by will or by the laws of
descent and distribution. Further, all Stock Appreciation Rights granted to a
Participant under the Plan shall be exercisable during his lifetime only by such
Participant.
    
 
   
SECTION 9. RESTRICTED STOCK
    
 
   
     9.1. Grant of Restricted Stock. Subject to the terms and provisions of this
Plan, the Committee, at any time and from time to time, may grant shares of
Restricted Stock to such Participants and in such amounts as it shall determine.
It is contemplated that Restricted Stock grants will be made only in
extraordinary situations of performance, promotion, retention or recruitment.
    
 
   
     9.2. Restricted Stock Agreement. Each Restricted Stock grant shall be
evidenced by a Restricted Stock Agreement that shall specify the restriction
period or periods, the number of Restricted Stock shares granted, and such other
provisions as the Committee shall determine.
    
 
   
     9.3. Transferability. Except as provided in this Section 9, the shares of
Restricted Stock granted hereunder may not be sold, transferred, pledged,
assigned or otherwise alienated or hypothecated until the termination of the
applicable Period of Restriction or for such period of time as shall be
established by the Committee and as shall be specified in the Restricted Stock
Agreement, or upon earlier satisfaction of other conditions as specified by the
Committee in its sole discretion and set forth in the Restricted Stock
Agreement. All rights with respect to the Restricted Stock granted to a
Participant under the Plan shall be exercisable during his lifetime only by such
Participant.
    
 
   
     9.4. Other Restrictions. The Committee shall impose such other restrictions
on any shares of Restricted Stock granted pursuant to the Plan as it may deem
advisable including, without limitation, restrictions under applicable Federal
or state securities laws, and may legend the certificates representing
Restricted Stock to give appropriate notice of such restrictions.
    
 
   
     9.5. Certificate Legend. In addition to any legends placed on certificates
pursuant to Subsection 9.4, each certificate representing shares of Restricted
Stock granted pursuant to the Plan shall bear the following legend:
    
 
   
          "The sale or other transfer of the shares of stock represented by this
     certificate, whether voluntary, involuntary or by operation of law, is
     subject to certain restrictions on transfer set forth in the 1992 Stock
     Compensation Plan of SPX Corporation, rules and administration adopted
     pursuant to such Plan, and a Restricted Stock grant dated                .
     A copy of the Plan, such rules and such Restricted Stock grant may be
     obtained from the Secretary of SPX Corporation."
    
 
   
     9.6. Removal of Restrictions. Except as otherwise provided in this Section,
shares of Restricted Stock covered by each Restricted Stock grant made under the
Plan shall become freely transferable by the
    
                                       D-6
<PAGE>   176
 
   
Participant after the last day of the Period of Restriction. Once the shares are
released from the restrictions, the Participant shall be entitled to have the
legend required by Subsection 9.5 removed from his Common Stock certificate.
    
 
   
     9.7. Voting Rights. During the Period of Restriction, Participants holding
shares of Restricted Stock granted hereunder may exercise full voting rights
with respect to those shares.
    
 
   
     9.8. Dividends and Other Distributions. During the Period of Restriction,
Participants holding shares of Restricted Stock granted hereunder shall be
entitled to receive all dividends and other distributions paid with respect to
those shares while they are so held. If any such dividends or distributions are
paid in shares of Common Stock, the shares shall be subject to the same
restrictions on transferability as the shares of Restricted Stock with respect
to which they were paid.
    
 
   
     9.9. Termination of Employment Due to Retirement. In the event that a
Participant terminates his employment with the Company because of normal
retirement (as defined under the then established rules of the Company), any
remaining Period of Restriction applicable to the Restricted Stock pursuant to
Subsection 9.3 shall automatically terminate and, except as otherwise provided
in Subsection 9.4, the shares of Restricted Stock shall thereby be free of
restrictions and freely transferable. In the event that a Participant terminates
his employment with the Company because of early retirement (as defined under
the then established rules of the Company), the Committee, in its sole
discretion, may waive the restrictions remaining on any or all shares of
Restricted Stock pursuant to Subsection 9.3 and add such new restrictions to
those shares of Restricted Stock as it deems appropriate.
    
 
   
     9.10. Termination of Employment Due to Death or Disability. In the event a
Participant's employment is terminated because of death or disability (as
defined under the then established rules of the Company), any remaining Period
of Restriction applicable to the Restricted Stock pursuant to Subsection 9.3
shall automatically terminate and, except as otherwise provided in Subsection
9.4, the shares of Restricted Stock shall thereby be free of restrictions and
fully transferable.
    
 
   
     9.11. Termination of Employment for Reasons Other Than Death, Disability or
Retirement. In the event that a Participant terminates his employment with the
Company for any reason other than those set forth in Subsections 9.9 and 9.10
during the Period of Restrictions, then any shares of Restricted Stock still
subject to restrictions as of the date of such termination shall automatically
be forfeited and returned to the Company; provided, however, that, in the event
of an involuntary termination of the employment of a Participant by the Company,
the Committee, in its sole discretion, may waive the automatic forfeiture of any
or all such shares and may add such new restrictions to such shares of
Restricted Stock as it deems appropriate.
    
 
   
SECTION 10. PERFORMANCE UNITS
    
 
   
     Performance units may be granted subject to such terms and conditions as
the Committee in its discretion shall determine. Performance units may be
granted either in the form of cash units or in share units which are equal in
value to one share of Common Stock or a combination thereof. The Committee shall
establish the performance goals to be attained in respect of the performance
units, the various percentages of performance unit value to be distributed upon
the attainment, in whole or in part, of the performance goals and such other
performance unit terms, conditions and restrictions as the Committee shall deem
appropriate. As soon as practicable after the termination of the performance
period, the Committee shall determine the payment, if any, which is due on the
performance unit in accordance with the terms thereof. The Committee shall
determine, among other things, whether the payment shall be made in the form of
cash or shares of Common Stock, or a combination thereof.
    
 
   
SECTION 11. BENEFICIARY DESIGNATION
    
 
   
     Each Participant under the Plan may, from time to time, name any
beneficiary or beneficiaries (who may be named contingently or successively) to
whom any benefit under the Plan is to be paid in case of his death. Each
designation will revoke all prior designations by the same Participant, shall be
in a form prescribed by
    
 
                                       D-7
<PAGE>   177
 
   
the Committee, and will be effective only when filed by the Participant in
writing with the Committee during his lifetime. In the absence of any such
designation, benefits remaining unpaid at the Participant's death shall be paid
to his estate.
    
 
   
SECTION 12. RIGHTS OF EMPLOYEES
    
 
   
     12.1. Employment. Nothing in the Plan shall interfere with or limit in any
way the right of the Company to terminate any Participant's employment at any
time, nor confer upon any Participant any right to continue in the employ of the
Company.
    
 
   
     12.2. Participation. No employee shall have a right to be selected as a
Participant, or, having been so selected, to be selected again as a Participant.
    
 
   
SECTION 13. MERGER OR CONSOLIDATION
    
 
   
     13.1. Treatment of Options and Stock Appreciation Rights. Upon a
dissolution or a liquidation of the Company, each Participant shall have the
right to exercise any unexercised Options or Stock Appreciation Rights, whether
or not then exercisable, subject to the provisions of the Plan immediately prior
to such dissolution or liquidation. If not exercised within a reasonable time
period, of not less than 30 days from the date of such dissolution or
liquidation, as determined by the Committee, all outstanding Options and Stock
Appreciation Rights shall terminate. In the event of a merger or consolidation
in which the Company is not the surviving corporation, each Participant shall be
offered a firm commitment whereby the resulting or surviving corporation will
tender to the Participant new Options and Stock Appreciation Rights in the
surviving corporation, with terms and conditions, both as to number of shares
and otherwise, which will substantially preserve to the Participant the rights
and benefits of the Options and Stock Appreciation Rights outstanding hereunder.
    
 
   
     13.2. Treatment of Restricted Stock. In the event of a dissolution or a
liquidation of the Company or a merger or consolidation in which the Company is
not the surviving corporation, all restrictions shall lapse on the shares of
Restricted Stock granted under the Plan and thereafter such shares shall be
freely transferable by the Participant, subject to applicable Federal or state
securities laws.
    
 
   
SECTION 14. AMENDMENT, MODIFICATION AND TERMINATION OF PLAN
    
 
   
     The Board may at any time terminate, and from time to time may amend or
modify, the Plan; provided, however, that no such action of the Board, without
approval of the shareholders, may:
    
 
   
          (a) Increase the total amount of Common Stock which may be issued
     under the Plan, except as provided in Subsections 5.1 and 5.3.
    
 
   
          (b) Change the provisions of the Plan regarding the Option Price
     except as permitted by Subsection 5.3.
    
 
   
          (c) Materially increase the cost of the Plan or materially increase
     the benefits to Participants.
    
 
   
          (d) Extend the period during which Options, Stock Appreciation Rights,
     Restricted Stock or Performance Units may be granted.
    
 
   
          (e) Extend the maximum period after the date of grant during which
     Options or Stock Appreciation Rights may be exercised.
    
 
   
No amendment, modification or termination of the Plan shall in any manner
adversely affect any Options, Stock Appreciation Rights or Restricted Stock
previously granted under the Plan, without the consent of the Participants.
    
 
   
SECTION 15. TAX WITHHOLDING
    
 
   
     15.1. Tax Withholding. The Company, as appropriate, shall have the right to
deduct from all payments any Federal, state or local taxes required by law to be
withheld with respect to such payments.
    
                                       D-8
<PAGE>   178
 
   
     15.2. Stock Withholding. With respect to withholding required upon the
exercise of nonqualified stock options, or upon the lapse of restrictions on
Restricted Stock, Participants may elect, subject to the approval of the
Committee, to satisfy the withholding required, in whole or in part, by having
the Company withhold shares of Common Stock having a value equal to the amount
required to be withheld. Participants may also elect to satisfy all or a portion
of the tax withholding (up to the maximum legally permissible withholding
amount) by (a) tendering shares of previously acquired Common Stock having a
value equal to the amount of tax to be withheld or (b) by directing the Company
to withhold shares of Common Stock, including attesting to the ownership of
Mature Common Stock having a value equal to the amount of tax to be withheld (in
the manner provided in Subsection 7.6). The value of the shares to be withheld,
tendered or attested is to be determined by such methods or procedures as shall
be established from time to time by the Committee. All elections shall be
irrevocable and shall be made in writing, signed by the Participant, and shall
satisfy such other requirements as the Committee shall deem appropriate.
    
 
   
SECTION 16. INDEMNIFICATION
    
 
   
     Each person who is or shall have been a member of the Committee or of the
Board shall be indemnified and held harmless by the Company against and from any
loss, cost, liability or expense that may be imposed upon or reasonably incurred
by him in connection with or resulting from any claim, action, suit or
proceeding to which he may be a party or in which he may be involved by reason
of any action taken or failure to act under the Plan and against and from any
and all amounts paid by him in settlement thereof, with the Company's approval,
or paid by him in satisfaction of any judgment in any such action, suit or
proceeding against him, provided he shall give the Company an opportunity, at
its expense, to handle and defend the same before he undertakes to handle and
defend it on his own behalf. The foregoing right of indemnification shall not be
exclusive of any other rights of indemnification to which such persons may be
entitled under the Company's Certificate of Incorporation or Bylaws, as a matter
of law or otherwise, or any power that the Company may have to indemnify them or
hold them harmless.
    
 
   
SECTION 17. REQUIREMENTS OF LAW
    
 
   
     17.1. Requirements of Law. The granting of Options, Stock Appreciation
Rights, Restricted Stock or Performance Units, and the issuance of shares of
Common Stock with respect to an Option exercise or Performance Unit award, shall
be subject to all applicable laws, rules and regulations, and to such approvals
by any governmental agencies or national securities exchanges as may be
required.
    
 
   
     17.2. Governing Law. The Plan, and all agreements hereunder, shall be
construed in accordance with and governed by the laws of the State of Michigan.
    
 
                                       D-9
<PAGE>   179
 
                                    PART II
 
                     INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 20. INDEMNIFICATION OF DIRECTORS AND OFFICERS
 
     Section 145 of the General Corporation Law of the State of Delaware
authorizes and empowers SPX to indemnify the directors, officers, employees and
agents of SPX against liabilities incurred in connection with, and related
expenses resulting from, any claim, action or suit brought against any such
person as a result of his relationship with SPX, provided that such persons
acted in good faith and in a manner such person reasonably believed to be in,
and not opposed to, the best interests of SPX in connection with the acts or
events on which such claim, action or suit is based. The finding of either civil
or criminal liability on the part of such persons in connection with such acts
or events is not necessarily determinative of the question of whether such
persons have met the required standard of conduct and are, accordingly, entitled
to be indemnified. The foregoing statements are subject to the detailed
provisions of Section 145 of the General Corporation Law of the State of
Delaware.
 
     SPX's Certificate of Incorporation provides that directors and officers of
SPX and those serving at the request of SPX as a director, officer, employee or
agent of another corporation or entity will be indemnified by SPX to the fullest
extent authorized by Delaware law. The indemnification right includes the right
to be paid by SPX the expenses incurred in defending any proceeding in advance
of its final disposition. The indemnification rights conferred by SPX's
Certificate of Incorporation are not exclusive of any other right to which
persons seeking indemnification may be entitled under any law, bylaw, agreement,
vote of stockholders or disinterested directors or otherwise. SPX is authorized
to purchase and maintain insurance on behalf of its directors and officers.
 
     In the Merger Agreement, SPX and MergerSub have agreed that all rights to
exculpation and indemnification for acts or omissions occurring at or prior to
the Effective Time now existing in favor of the current or former directors or
officers of General Signal or any of its subsidiaries as provided in General
Signal's Certificate of Incorporation or By-Laws or in any agreement will
survive the Merger and continue in full force and effect. For six years from the
Effective Time, SPX will indemnify such persons to the fullest extent permitted
by applicable law and will use its reasonable best efforts to obtain and
maintain in effect, or cause the Surviving Corporation to obtain and maintain in
effect, General Signal's current directors' and officers' liability insurance
covering those persons who are currently covered by General Signal's insurance
policy, provided that SPX will not be required to pay an annual premium for such
insurance in excess of 200% of the annual premiums currently paid by General
Signal, but in that case must purchase as much coverage as possible for that
amount.
 
                                      II-1
<PAGE>   180
 
ITEM 21. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES
 
     (a) Exhibits
 
     Set forth below is a list of the exhibits included as part of this
Registration Statement.
 
   
<TABLE>
<CAPTION>
EXHIBIT
NUMBER                               DESCRIPTION
- -------                              -----------
<C>          <S>
   2*        Agreement and Plan of Merger, dated as of July 19, 1997,
             among SPX, MergerSub and General Signal (included as
             Appendix A to the Joint Proxy Statement/Prospectus).
   3(i)      Restated Certificate of Incorporation, incorporated herein
             by reference from the Registrant's Quarterly Report on Form
             10-Q, file No. 1-6948, for the quarter ended June 30, 1998.
    (ii)     Certificate of Ownership and Merger dated April 25, 1988,
             incorporated herein by reference from the Registrant's
             Annual Report on Form 10-K, file No. 1-6948, for the year
             ended December 31, 1988.
    (iii)    By-Laws as amended through October 25, 1995, incorporated
             herein by reference from the Registrant's Quarterly Report
             on Form 10-Q, file No. 1-6948, for the quarter ended
             September 30, 1995.
   4(i)      11 3/4% Senior Subordinated Notes due 2002, incorporated
             herein by reference from the Registrant's Amendment No. 2 to
             Form S-3 Registration Statement 33-52833, filed on May 27,
             1994.
    (ii)     Indenture, dated as of June 6, 1994, between the Registrant
             and The Bank of New York, as trustee, relating to the
             11 3/4% Senior Subordinated Notes due 2002, incorporated
             herein by reference from the Registrant's Amendment No. 2 to
             Form S-3 Registration Statement 33-52833, filed on May 27,
             1994.
    (iii)    Rights Agreement, dated as of June 25, 1996 between the
             Registrant and The Bank of New York, as Rights Agent,
             relating to Rights to purchase preferred stock under certain
             circumstances, incorporated herein by reference from the
             Registrant's Registration Statement on Form 8-A, filed on
             June 26, 1996.
    (iv)     Amendment No. 1 to Rights Agreement, effective October 22,
             1997, between the Registrant and The Bank of New York,
             incorporated herein by reference from the Registrant's
             Registration Statement on Form 8-A/A, filed on January 9,
             1998.
    (v)      Credit Agreement between the Registrant and The First
             National Bank of Chicago, as agent for the banks named
             therein, dated as of May 7, 1997, incorporated herein by
             reference from the Registrant's Quarterly Report on Form
             10-Q, file No. 1-6948, for the quarter ended March 31, 1997.
    (vi)     Amendment No. 1 and Waiver to Credit Agreement between SPX
             Corporation and The First National Bank of Chicago, as agent
             for the banks named therein, dated as of December 19, 1997,
             incorporated herein by reference to the Registrant's Annual
             Report on Form 10-K, file No. 1-6948, for the year ended
             December 31, 1997.
   5*        Opinion of Fried, Frank, Harris, Shriver & Jacobson as to
             the legality of the shares of common stock being offered.
   8*        Opinion of Fried, Frank, Harris, Shriver & Jacobson as to
             certain tax matters.
  10(i)      Sealed Power Corporation Executive Performance Unit Plan,
             incorporated herein by reference from the Registrant's
             Amendment No. 1 on Form 8 to the Annual Report on Form 10-K,
             file No. 1-6948, for the year ended December 31, 1988.
    (ii)     SPX Corporation Retirement Plan for Directors, as amended
             and restated, incorporated herein by reference from the
             Registrant's Amendment No. 1 on Form 8 to the Annual Report
             on Form 10-K, file No. 1-6948, for the year ended December
             31, 1988.
</TABLE>
    
 
                                      II-2
<PAGE>   181
 
   
<TABLE>
<CAPTION>
EXHIBIT
NUMBER                               DESCRIPTION
- -------                              -----------
<C>          <S>
    (iii)    SPX Corporation Supplemental Retirement Plan for Top
             Management, as amended and restated, incorporated herein by
             reference from the Registrant's Amendment No. 1 on Form 8 to
             the Annual Report on Form 10-K, file No. 1-6948, for the
             year ended December 31, 1988.
    (iv)     SPX Corporation Excess Benefit Plan No. 3, as amended and
             restated, incorporated herein by reference from the
             Registrant's Amendment No. 1 on Form 8 to the Annual Report
             on Form 10-K, file No. 1-6948, for the year ended December
             31, 1988.
    (v)      SPX Corporation Executive Severance Agreement, incorporated
             herein by reference from the Registrant's Amendment No. 1 on
             Form 8 to the Annual Report on Form 10-K, file No. 1-6948,
             for the year ended December 31, 1988.
    (vi)     SPX Corporation Trust Agreement for Supplemental Retirement
             Plan for Top Management, Excess Benefit Plan No. 3, and
             Retirement Plan for Directors, incorporated herein by
             reference from the Registrant's Amendment No. 1 on Form 8 to
             the Annual Report on Form 10-K, file No. 1-6948, for the
             year ended December 31, 1988.
    (vii)    SPX Corporation Trust Agreement for Participants in
             Executive Severance Agreements, Special Separation Pay Plan
             for Corporate Staff Executive Personnel Agreements and
             Special Separation Pay Plan for Corporate Staff Management
             and Administrative Personnel Agreements, incorporated herein
             by reference from the Registrant's Amendment No. 1 on Form 8
             to the Annual Report on Form 10-K, file No. 1-6948, for the
             year ended December 31, 1988.
    (viii)   SPX Corporation Stock Compensation Plan Limited Stock
             Appreciation Rights Award, incorporated herein by reference
             from the Registrant's Amendment No. 1 on Form 8 to the
             Annual Report on Form 10-K, file No. 1-6948, for the year
             ended December 31, 1988.
    (ix)     SPX Corporation Stock Ownership Plan, incorporated herein by
             reference from the Registrant's Current Report on Form 8-K,
             file No. 1-6948, filed on July 26, 1989.
    (x)      SPX Corporation Stock Ownership Trust, incorporated herein
             by reference from the Registrant's Current Report on Form
             8-K, file No. 1-6948, filed on July 26, 1989.
    (xi)     SPX Corporation 1992 Stock Compensation Plan (included as
             Appendix D to the Joint Proxy Statement/Prospectus).
    (xii)    SPX Corporation Supplemental Employee Stock Ownership Plan,
             incorporated herein by reference from the Registrant's
             Annual Report on Form 10-K, file No. 1-6948, for the year
             ended December 31, 1990.
    (xiii)   Employment agreement, and related Nonqualified Stock Option
             Agreement and Restricted Shares Agreement, between the
             Registrant and John B. Blystone dated as of November 24,
             1995, incorporated herein by reference to the Registrant's
             Annual Report on Form 10-K, file No. 1-6948, for the year
             ended December 31, 1995.
    (xiv)    Employment agreement between the Registrant and John B.
             Blystone dated as of January 1, 1997, incorporated herein by
             reference to the Registrant's Annual Report on Form 10-K,
             file No. 1-6948, for the year ended December 31, 1996.
    (xv)     SPX Corporation 1997 Non-Employee Director's Compensation
             Plan, incorporated herein by reference from Exhibit A to the
             Proxy Statement contained in Registrant's Schedule 14A, file
             No. 1-6948, filed on March 25, 1997.
    (xvi)*   SPX Corporation Supplemental Retirement Savings Plan for Top
             Management.
  21         Subsidiaries of the Registrant incorporated herein by
             reference to the Registrant's Annual Report on Form 10-K,
             file No. 1-6948, for the year ended December 31, 1997
  23(i)*     Consent of Arthur Andersen LLP, independent public
             accountants for SPX Corporation.
    (ii)*    Consent of Ernst & Young LLP, independent auditors for
             General Signal Corporation.
    (iii)*   Consent of Wachtell, Lipton, Rosen & Katz.
</TABLE>
    
 
                                      II-3
<PAGE>   182
 
   
<TABLE>
<CAPTION>
EXHIBIT
NUMBER                               DESCRIPTION
- -------                              -----------
<C>          <S>
    (iv)*    Consent of Fried, Frank, Harris, Shriver & Jacobson
             (included in Exhibits 5 and 8).
    (v)**    Consent of Lazard Freres & Co. LLC.
    (vi)**   Consent of Stern Stewart & Co.
  24**       Powers of Attorney.
  99(i)*     SPX Proxy Card.
    (ii)*    General Signal Proxy Card.
    (iii)*   Form of Election.
    (iv)*    Opinion of Stern Stewart & Co., financial advisor of SPX
             (included as Appendix B to the Joint Proxy
             Statement/Prospectus).
    (v)*     Opinion of Lazard Freres & Co. LLC, investment banker of
             General Signal (included as Appendix C to the Joint Proxy
             Statement/Prospectus).
    (vi)**   Consent of Emerson U. Fullwood.
    (vii)*   Consent of H. Kent Bowen.
</TABLE>
    
 
- ---------------
 * Filed herewith.
   
** Previously filed.
    
 
     (b) Financial Statement Schedules
 
     All the schedules are omitted because they are not required, are not
applicable or the information is included in the selected consolidated financial
data or notes thereto contained herein.
 
ITEM 22. UNDERTAKINGS
 
     The undersigned registrant hereby undertakes:
 
          (1) To file, during any period in which offers or sales are being
     made, a post-effective amendment to this registration statement:
 
             (i) To include any prospectus required by Section 10(a)(3) of the
        Securities Act of 1933;
 
             (ii) To reflect in the prospectus any facts or events arising after
        the effective date of the registration statement (or the most recent
        post-effective amendment thereof) which, individually or in the
        aggregate, represent a fundamental change in the information set forth
        in the registration statement. Notwithstanding the foregoing, any
        increase or decrease in volume of securities offered (if the total
        dollar value of securities offered would not exceed that which was
        registered) and any deviation from the low or high end of the estimated
        maximum offering range may be reflected in the form of prospectus filed
        with the Commission pursuant to Rule 424(b) if, in the aggregate, the
        changes in volume and price represent no more than a 20% change in the
        maximum aggregate offering price set forth in the "Calculation of
        Registration Fee" table in the effective registration statement; and
 
             (iii) To include any material information with respect to the plan
        of distribution not previously disclosed in the registration statement
        or any material change to such information in the registration
        statement;
 
provided, however, that the undertakings set forth in paragraphs (1)(i) and (ii)
do not apply if the information required to be included in a post-effective
amendment by those paragraphs is contained in periodic reports filed by the
registrant pursuant to Section 13 or Section 15(d) of the Securities Exchange
Act of 1934 that are incorporated by reference in the registration statement.
 
          (2) That, for the purpose of determining any liability under the
     Securities Act of 1933, each such post-effective amendment shall be deemed
     to be a new registration statement relating to the securities offered
     therein, and the offering of such securities at that time shall be deemed
     to be the initial bona fide offering thereof.
                                      II-4
<PAGE>   183
 
          (3) To remove from registration by means of a post-effective amendment
     any of the securities being registered which remain unsold at the
     termination of the offering.
 
          (4) That, for the purpose of determining any liability under the
     Securities Act of 1933, each filing of the Registrant's annual report
     pursuant to Section 13(a) or Section 15(d) of the Securities Exchange Act
     of 1934 (and, where applicable, each filing of an employee benefit plan's
     annual report pursuant to Section 15(d) of the Securities Exchange Act of
     1934) that is incorporated by reference in the registration statement shall
     be deemed to be a new registration statement relating to the securities
     offered therein, and the offering of such securities at that time shall be
     deemed to be the initial bona fide offering thereof.
 
          (5) To deliver or cause to be delivered with the prospectus, to each
     person to whom the prospectus is sent or given, the latest annual report to
     security holders that is incorporated by reference in the prospectus and
     furnished pursuant to and meeting the requirements of Rule 14a-3 or Rule
     14c-3 under the Securities Exchange Act of 1934; and, where interim
     financial information required to be presented by Article 3 of Regulations
     S-X is not set forth in the prospectus, to deliver, or cause to be
     delivered to each person to whom the prospectus is sent or given, the
     latest quarterly report that is specifically incorporated by reference to
     provide such interim financial information.
 
          (6) That prior to any public reoffering of the securities registered
     hereunder through use of a prospectus which is a part of this registration
     statement, by any person or party who is deemed to be an underwriter within
     the meaning of Rule 145(c), the issuer undertakes that such reoffering
     prospectus will contain the information called for by the applicable
     registration form with respect to reofferings by persons who may be deemed
     underwriters, in addition to the information called for by the other Items
     of the applicable form.
 
          (7) That every prospectus (i) that is filed pursuant to the
     immediately preceding paragraph, or (ii) that purports to meet the
     requirements of Section 10(a)(3) of the Securities Act of 1933 and is used
     in connection with an offering of securities subject to Rule 415, will be
     filed as a part of an amendment to the registration statement and will not
     be used until such amendment is effective, and that, for purposes of
     determining any liability under the Securities Act of 1933, each such
     post-effective amendment shall be deemed to be a new registration statement
     relating to the securities offered therein, and the offering of such
     securities at that time shall be deemed to be the initial bona fide
     offering thereof.
 
          (8) To respond to requests for information that is incorporated by
     reference into the prospectus pursuant to Items 4, 10(b), 11 or 13 of this
     Form within one business day of receipt of such request, and to send the
     incorporated documents by first class mail or other equally prompt means.
     This includes information contained in documents filed subsequent to the
     effective date of the registration statement through the date of responding
     to the request.
 
          (9) To supply by means of a post-effective amendment all information
     concerning a transaction, and the company being acquired involved therein,
     that was not the subject of and included in the registration statement when
     it became effective.
 
     Insofar as indemnification for liabilities arising under the Securities Act
of 1933 may be permitted to directors, officers and controlling persons of the
Registrant pursuant to the foregoing provisions, or otherwise, the Registrant
has been advised that in the opinion of the Securities and Exchange Commission
such indemnification is against public policy as expressed in the Securities Act
of 1933 and is, therefore, unenforceable. In the event that a claim for
indemnification against liabilities (other than the payment by the Registrant of
expenses incurred by a director, officer or controlling person of the Registrant
of expenses incurred by a director, officer or controlling person of the
Registrant in the successful defense of any action, suit or proceeding) is
asserted by such director, officer or controlling person in connection with the
securities being registered, the Registrant will, unless in the opinion of its
counsel the matter has been settled by controlling precedent, submit to a court
of appropriate jurisdiction the question whether such indemnification by it is
against public policy as expressed in the Securities Act of 1933 and will be
governed by the final adjudication of such issue.
 
                                      II-5
<PAGE>   184
 
                                   SIGNATURES
 
   
     Pursuant to the requirements of the Securities Act of 1933, as amended, the
Registrant has duly caused this Amendment to be signed on its behalf by the
undersigned, thereunto duly authorized, in the City of Muskegon, State of
Michigan, on September 3, 1998.
    
 
                                          SPX Corporation
 
                                          By: /s/ CHRISTOPHER J. KEARNEY
 
                                            ------------------------------------
                                                 Christopher J. Kearney
                                               Vice President, Secretary
                                               and General Counsel
 
   
     Pursuant to the requirements of the Securities Act of 1933, as amended,
this Amendment has been signed by the following persons (who include all members
of the Board of Directors) in the capacities indicated on September 3, 1998.
    
 
   
<TABLE>
<CAPTION>
                     SIGNATURE                                         TITLE
                     ---------                                         -----
<S>  <C>                                         <C>
                         *                       Chairman, President and Chief Executive Officer
     ------------------------------------------  and Director (Principal Executive Officer)
                  John B. Blystone
 
                         *                       Director
     ------------------------------------------
                 J. Kermit Campbell
 
                         *                       Director
     ------------------------------------------
                  Frank A. Ehmann
 
                         *                       Director
     ------------------------------------------
               Charles E. Johnson II
 
                         *                       Director
     ------------------------------------------
                  Peter H. Merlin
 
                         *                       Director
     ------------------------------------------
                  Sarah R. Coffin
 
                         *                       Director
     ------------------------------------------
                  Ronald L. Kerber
 
                         *                       Director
     ------------------------------------------
                 David P. Williams
 
                         *                       Vice President-Finance, Treasurer and Chief
     ------------------------------------------  Financial Officer (Principal Financial Officer)
                 Patrick J. O'Leary
 
                         *                       Controller (Principal Accounting Officer)
     ------------------------------------------
                   Kenneth C. Dow
 
*By          /s/ CHRISTOPHER J. KEARNEY
     ------------------------------------------
               Christopher J. Kearney
                As Attorney-In-Fact
</TABLE>
    
 
                                      II-6
<PAGE>   185
 
                                 EXHIBIT INDEX
 
   
<TABLE>
<CAPTION>
EXHIBIT
NUMBER                               DESCRIPTION                           PAGE NO.
- -------                              -----------                           --------
<C>          <S>                                                           <C>
   2*        Agreement and Plan of Merger, dated as of July 19, 1997,
             among SPX, MergerSub and General Signal (included as
             Appendix A to the Joint Proxy Statement/Prospectus).
   3(i)      Restated Certificate of Incorporation, incorporated herein
             by reference from the Registrant's Quarterly Report on Form
             10-Q, file No. 1-6948, for the quarter ended June 30, 1998.
    (ii)     Certificate of Ownership and Merger dated April 25, 1988,
             incorporated herein by reference from the Registrant's
             Annual Report on Form 10-K, file No. 1-6948, for the year
             ended December 31, 1988.
    (iii)    By-Laws as amended through October 25, 1995, incorporated
             herein by reference from the Registrant's Quarterly Report
             on Form 10-Q, file No. 1-6948, for the quarter ended
             September 30, 1995.
   4(i)      11 3/4% Senior Subordinated Notes due 2002, incorporated
             herein by reference from the Registrant's Amendment No. 2 to
             Form S-3 Registration Statement 33-52833, filed on May 27,
             1994.
    (ii)     Indenture, dated as of June 6, 1994, between the Registrant
             and The Bank of New York, as trustee, relating to the
             11 3/4% Senior Subordinated Notes due 2002, incorporated
             herein by reference from the Registrant's Amendment No. 2 to
             Form S-3 Registration Statement 33-52833, filed on May 27,
             1994.
    (iii)    Rights Agreement, dated as of June 25, 1996 between the
             Registrant and The Bank of New York, as Rights Agent,
             relating to Rights to purchase preferred stock under certain
             circumstances, incorporated herein by reference from the
             Registrant's Registration Statement on Form 8-A, filed on
             June 26, 1996.
    (iv)     Amendment No. 1 to Rights Agreement, effective October 22,
             1997, between the Registrant and The Bank of New York,
             incorporated herein by reference from the Registrant's
             Registration Statement on Form 8-A/A, filed on January 9,
             1998.
    (v)      Credit Agreement between the Registrant and The First
             National Bank of Chicago, as agent for the banks named
             therein, dated as of May 7, 1997, incorporated herein by
             reference from the Registrant's Quarterly Report on Form
             10-Q, file No. 1-6948, for the quarter ended March 31, 1997.
    (vi)     Amendment No. 1 and Waiver to Credit Agreement between SPX
             Corporation and The First National Bank of Chicago, as agent
             for the banks named therein, dated as of December 19, 1997,
             incorporated herein by reference to the Registrant's Annual
             Report on Form 10-K, file No. 1-6948, for the year ended
             December 31, 1997.
   5*        Opinion of Fried, Frank, Harris, Shriver & Jacobson as to
             the legality of the shares of common stock being offered.
   8*        Opinion of Fried, Frank, Harris, Shriver & Jacobson as to
             certain tax matters.
  10(i)      Sealed Power Corporation Executive Performance Unit Plan,
             incorporated herein by reference from the Registrant's
             Amendment No. 1 on Form 8 to the Annual Report on Form 10-K,
             file No. 1-6948, for the year ended December 31, 1988.
</TABLE>
    
<PAGE>   186
 
   
<TABLE>
<CAPTION>
EXHIBIT
NUMBER                               DESCRIPTION                           PAGE NO.
- -------                              -----------                           --------
<C>          <S>                                                           <C>
    (ii)     SPX Corporation Retirement Plan for Directors, as amended
             and restated, incorporated herein by reference from the
             Registrant's Amendment No. 1 on Form 8 to the Annual Report
             on Form 10-K, file No. 1-6948, for the year ended December
             31, 1988.
    (iii)    SPX Corporation Supplemental Retirement Plan for Top
             Management, as amended and restated, incorporated herein by
             reference from the Registrant's Amendment No. 1 on Form 8 to
             the Annual Report on Form 10-K, file No. 1-6948, for the
             year ended December 31, 1988.
    (iv)     SPX Corporation Excess Benefit Plan No. 3, as amended and
             restated, incorporated herein by reference from the
             Registrant's Amendment No. 1 on Form 8 to the Annual Report
             on Form 10-K, file No. 1-6948, for the year ended December
             31, 1988.
    (v)      SPX Corporation Executive Severance Agreement, incorporated
             herein by reference from the Registrant's Amendment No. 1 on
             Form 8 to the Annual Report on Form 10-K, file No. 1-6948,
             for the year ended December 31, 1988.
    (vi)     SPX Corporation Trust Agreement for Supplemental Retirement
             Plan for Top Management, Excess Benefit Plan No. 3, and
             Retirement Plan for Directors, incorporated herein by
             reference from the Registrant's Amendment No. 1 on Form 8 to
             the Annual Report on Form 10-K, file No. 1-6948, for the
             year ended December 31, 1988.
    (vii)    SPX Corporation Trust Agreement for Participants in
             Executive Severance Agreements, Special Separation Pay Plan
             for Corporate Staff Executive Personnel Agreements and
             Special Separation Pay Plan for Corporate Staff Management
             and Administrative Personnel Agreements, incorporated herein
             by reference from the Registrant's Amendment No. 1 on Form 8
             to the Annual Report on Form 10-K, file No. 1-6948, for the
             year ended December 31, 1988.
    (viii)   SPX Corporation Stock Compensation Plan Limited Stock
             Appreciation Rights Award, incorporated herein by reference
             from the Registrant's Amendment No. 1 on Form 8 to the
             Annual Report on Form 10-K, file No. 1-6948, for the year
             ended December 31, 1988.
    (ix)     SPX Corporation Stock Ownership Plan, incorporated herein by
             reference from the Registrant's Current Report on Form 8-K,
             file No. 1-6948, filed on July 26, 1989.
    (x)      SPX Corporation Stock Ownership Trust, incorporated herein
             by reference from the Registrant's Current Report on Form
             8-K, file No. 1-6948, filed on July 26, 1989.
    (xi)     SPX Corporation 1992 Stock Compensation Plan (included as
             Appendix D to the Joint Proxy Statement/Prospectus).
    (xii)    SPX Corporation Supplemental Employee Stock Ownership Plan,
             incorporated herein by reference from the Registrant's
             Annual Report on Form 10-K, file No. 1-6948, for the year
             ended December 31, 1990.
    (xiii)   Employment agreement, and related Nonqualified Stock Option
             Agreement and Restricted Shares Agreement, between the
             Registrant and John B. Blystone dated as of November 24,
             1995, incorporated herein by reference to the Registrant's
             Annual Report on Form 10-K, file No. 1-6948, for the year
             ended December 31, 1995.
    (xiv)    Employment agreement between the Registrant and John B.
             Blystone dated as of January 1, 1997, incorporated herein by
             reference to the Registrant's Annual Report on Form 10-K,
             file No. 1-6948, for the year ended December 31, 1996.
</TABLE>
    
<PAGE>   187
 
   
<TABLE>
<CAPTION>
EXHIBIT
NUMBER                               DESCRIPTION                           PAGE NO.
- -------                              -----------                           --------
<C>          <S>                                                           <C>
    (xv)     SPX Corporation 1997 Non-Employee Director's Compensation
             Plan, incorporated herein by reference from Exhibit A to the
             Proxy Statement contained in Registrant's Schedule 14A, file
             No. 1-6948, filed on March 25, 1997.
    (xvi)*   SPX Corporation Supplemental Retirement Savings Plan for Top
             Management.
  21         Subsidiaries of the Registrant incorporated herein by
             reference to the Registrant's Annual Report on Form 10-K,
             file No. 1-6948, for the year ended December 31, 1997
  23(i)*     Consent of Arthur Andersen LLP, independent public
             accountants for SPX Corporation.
    (ii)*    Consent of Ernst & Young LLP, independent auditors for
             General Signal Corporation.
    (iii)*   Consent of Wachtell, Lipton, Rosen & Katz.
    (iv)*    Consent of Fried, Frank, Harris, Shriver & Jacobson
             (included in Exhibits 5 and 8).
    (v)**    Consent of Lazard Freres & Co. LLC.
    (vi)**   Consent of Stern Stewart & Co.
  24**       Powers of Attorney.
  99(i)*     SPX Proxy Card.
    (ii)*    General Signal Proxy Card.
    (iii)*   Form of Election.
    (iv)*    Opinion of Stern Stewart & Co., financial advisor of SPX
             (included as Appendix B to the Joint Proxy
             Statement/Prospectus).
    (v)*     Opinion of Lazard Freres & Co. LLC, investment banker of
             General Signal (included as Appendix C to the Joint Proxy
             Statement/Prospectus).
    (vi)**   Consent of Emerson U. Fullwood.
    (vii)*   Consent of H. Kent Bowen.
</TABLE>
    
 
- ---------------
 * Filed herewith.
 
   
** Previously filed.
    

<PAGE>   1

                                                                     EXHIBIT 5

                   FRIED, FRANK, HARRIS, SHRIVER & JACOBSON
              A PARTNERSHIP INCLUDING PROFESSIONAL CORPORATIONS


                              ONE NEW YORK PLAZA
                        NEW YORK, NEW YORK 10004-1980
                                 212-859-8000
                               FAX 212-859-4000


           

September 3, 1998


SPX Corporation
700 Terrace Point Drive
Muskegon, Michigan 49443-3301

Gentlemen:

        We are acting as special counsel for SPX Corporation, a Delaware
corporation (the "Company"), in connection with the preparation of the
Registration Statement on Form S-4, Registration No. 333-60853 (the
"Registration Statement"), under the Securities Act of 1933, as amended (the
"Act"), relating to the issuance by the Company of shares of the Company's
common stock, par value $10.00 per share ("SPX Common Stock"), in connection
with the merger (the "Merger") of General Signal Corporation, a New York
corporation ("General Signal"), with and into SAC Corp., a Delaware corporation
and wholly owned subsidiary of the Company ("MergerSub"), pursuant to the
Agreement and Plan of Merger, dated as of July 19, 1998 (the "Merger
Agreement"), among the Company, MergerSub and General Signal.  In the Merger,
each General Signal stockholder will be entitled to receive, at his or her
election but subject to the limitations and proration procedures set forth in
the Merger Agreement, for each share of common stock, par value $1.00 per
share, of General Signal ("General Signal Common Stock") held by such
stockholder, either (i) 0.6977 of a share of SPX Common Stock; (ii) $45.00 in
cash, without interest; or (iii) 0.4186 of a share of SPX Common Stock and
$18.00 in cash, without interest, provided that only 40% of the outstanding
shares of General Signal Common Stock will be exchanged for cash and only 60% of
the outstanding shares of General Signal Common Stock will be exchanged for
shares of SPX Common Stock.  This opinion is delivered in accordance with the
requirements of Item 601(b)(5) of Regulation S-K promulgated under the Act.

        With your permission, all assumptions and statements of reliance herein
have been made without any independent investigation or verification on our
part except to the extent otherwise expressly stated, and we express no opinion
with respect to the subject matter or accuracy of such assumptions or items
relied upon.



                                      1
<PAGE>   2




          In connection with this opinion, we have (i) investigated such
questions of law, (ii) examined originals or certified, conformed or
reproduction copies of such agreements, instruments, documents and records of
the Company and its subsidiaries, such certificates of public officials,
officers or other representatives of the Company and its subsidiaries, and other
persons, and such other documents, and (iii) reviewed such information from
officers and representatives of the Company and others as we have deemed
necessary or appropriate for the purposes of this opinion.

          In all such examinations, we have assumed the legal capacity of all
natural persons, the genuineness of all signatures on original or certified
copies, and the conformity to original or certified documents of all copies
submitted to us as conformed or reproduction copies. As to various questions of
fact relevant to the opinion expressed herein, we have relied upon, and assumed
the accuracy of or compliance with, representations and warranties contained in
the documents relevant hereto and certificates and oral or written  statements
and other information of or from public officials, officers or other
representatives of the Company, and other persons. To the extent it may be
relevant to the opinion expressed herein, we have assumed that the parties to
the documents other than the Company have the power and authority to enter into
and perform such documents and to consummate the transactions contemplated
thereby, that the documents have been duly authorized, executed and delivered
by, and constitute legal, valid and binding obligations of such parties
enforceable against such parties in accordance with their terms, and that such
parties will comply with all of their obligations under the documents and all
laws applicable thereto.

          Based upon the foregoing, assuming that the General Signal Common
Stock is validly issued, fully paid and nonassessable and subject to the
limitations, qualifications and assumptions set forth herein, it is our opinion
that, if SPX Common Stock is issued and delivered as described in the
Registration Statement and in accordance with the Merger Agreement upon
satisfaction of the conditions to closing set forth therein, at such time of
issuance such shares of SPX Common Stock will be validly issued, fully paid and
nonassessable.

          The opinion expressed herein is limited to the General Corporation
Law of the State of Delaware, as currently in effect. The opinion expressed
herein is given as of the date hereof, and we undertake no obligation to
supplement this letter if any applicable laws change after the date hereof or
if we become aware of any facts that might change the opinion expressed herein
after the date hereof, or for any other reason.




                                      2
<PAGE>   3


         We hereby consent to the filing of this opinion as an exhibit to the
Registration Statement and to the reference to this firm under the captions
"Certain Federal Income Tax Consequences of the Merger" and "Legal Matters" in 
the Joint Proxy Statement/Prospectus forming a part of the Registration 
Statement.  In giving this consent, we do not hereby admit that we are in the 
category of persons whose consent is required under Section 7 of the Act.



                                        FRIED, FRANK, HARRIS, SHRIVER & JACOBSON




                                        By: /s/ ROBERT C. SCHWENKEL             
                                            ------------------------------------
                                                Robert C. Schwenkel










                                      3

<PAGE>   1
                                                                      EXHIBIT 8 

                   FRIED, FRANK, HARRIS, SHRIVER & JACOBSON
              A PARTNERSHIP INCLUDING PROFESSIONAL CORPORATIONS
                                
                              ONE NEW YORK PLAZA
                        NEW YORK, NEW YORK 10004-1980
                                 212-859-8000
                               FAX 212-859-4000


SPX Corporation
700 Terrace Point Drive
P.O. Box 3301
Muskegon, Michigan  49443-3301

Gentlemen:

         We are acting as counsel to SPX Corporation, a Delaware corporation
("SPX"), and SAC Corp., a Delaware corporation and a wholly-owned subsidiary of
SPX ("Merger Sub"), in connection with the merger (the "Merger") of General
Signal Corporation, a New York corporation ("General Signal"), with and into
Merger Sub pursuant to an Agreement and Plan of Merger, dated as of July 19,
1998, by and among SPX, Merger Sub, and General Signal.

         SPX proposes to file with the Securities and Exchange Commission under
the Securities Act of 1933, as amended (the "1933 Act"), a registration 
statement on Form S-4 (File No. 333-60853) (the "Registration Statement") with
respect to the common stock, par value $10.00 per share, of SPX to be issued to
holders of shares of common stock, par value $1.00 per share, of General
Signal in connection with the Merger. In addition, General Signal and SPX have
prepared, and we have reviewed, a Joint Proxy Statement/Prospectus which is
contained in and made a part of the Registration Statement (the "Joint Proxy
Statement/Prospectus"). In rendering the opinion set forth below, we have
relied upon the facts and assumptions stated in the Joint Proxy
Statement/Prospectus and upon such other documents as we have deemed
appropriate. Terms not otherwise defined herein shall have the meaning ascribed
to them in the Joint Proxy Statement/Prospectus.

         We have assumed that all parties to the Merger Agreement have acted,
and will act, in accordance with the terms of such Merger Agreement and that the
Merger will be consummated at the Effective Time pursuant to the terms and
conditions set forth in the Merger Agreement without the waiver or modification
of any such terms and conditions. Under the Merger Agreement, it is a condition
to the closing of the Merger that SPX and General Signal each receive an opinion
from their respective legal advisors to the effect that the Merger will, subject
to certain assumptions and based upon certain representations by SPX and General
Signal, constitute a reorganization under Section 368(a) of the Internal 
Revenue Code of 1986, as amended.

         Based upon and subject to the foregoing, and subject to the
qualifications, limitations and assumptions contained in the portion of the
Joint Proxy Statement/Prospectus captioned "Certain Federal Income Tax
Consequences of the Merger," it is our opinion that, assuming that the Merger
will constitute a reorganization under Section 368(a) of the Internal Revenue
Code of 1986, as


<PAGE>   2


amended, that portion of the Joint Proxy Statement/Prospectus captioned "Certain
Federal Income Tax Consequences of the Merger," to the extent the statements
contained therein relate to matters of United States federal income tax law or
legal conclusions with respect thereto, fairly presents the information
disclosed therein in all material respects. No opinion is expressed on any
matters other than those specifically referred to herein.

         The opinion is furnished to you for use in connection with the
Registration Statement and may not be used for any other purpose without our
prior written consent. We hereby consent to the filing of this opinion as an
exhibit to the Registration Statement and to the references to this firm under
the captions "Certain Federal Income Tax Consequences of the Merger" and "Legal
Matters" in the Registration Statement. In giving such consent, we do not
thereby admit that we are in the category of persons whose consent is required
under Section 7 of the 1933 Act.

                                        Very truly yours,

                                        FRIED, FRANK, HARRIS, SHRIVER & JACOBSON


                                        By:     /s/ Jack L. Jacobson
                                            ------------------------------------
                                                    Jack L. Jacobson




                                     - 2 -

<PAGE>   1
                                                                 EXHIBIT 10(xvi)









                                 SPX CORPORATION

                      SUPPLEMENTAL RETIREMENT SAVINGS PLAN



                               FOR TOP MANAGEMENT



                -----------------------------------------------




                      AS ADOPTED EFFECTIVE JANUARY 1, 1990



<PAGE>   2

<TABLE>
<CAPTION>


                                TABLE OF CONTENTS

                                                                                Page
<S>           <C>                                                                <C>
ARTICLE I DEFINITIONS.............................................................1

    1.1       "Account"...........................................................1

    1.2       "Accounting Date"...................................................1

    1.3       "Affiliated Company"................................................1

    1.4       "Beneficiary".......................................................1

    1.5       "Board".............................................................1

    1.6       "Code"..............................................................1

    1.7       "Company"...........................................................1

    1.8       "Compensation"......................................................2

    1.9       "Compensation Committee"............................................2

    1.10      "Employee"..........................................................2

    1.11      "Participant".......................................................2

    1.12      "Plan"..............................................................2

    1.13      "Plan Year".........................................................2

    1.14      "Qualified Plan"....................................................2

    1.15      "Trustee"...........................................................2

    1.16      "Construction"......................................................2

ARTICLE II ELIGIBILITY............................................................3

    2.1       Participation.......................................................3

    2.2       Top Hat Requirements................................................3

    2.3       Reduction in Status; Removal From Participation.....................3

</TABLE>


                                      -i-
<PAGE>   3


<TABLE>

<S>                                                                              <C>
ARTICLE III CONTRIBUTIONS AND ACCOUNTS............................................3

    3.1       Election to Contribute..............................................3

    3.2       Duration of Election................................................4

    3.3       Disposition of Excess Contributions in the Qualified Plan...........4

    3.4       Company Matching Contributions......................................4

    3.5       Allocation of Salary Reduction and Company Matching Contributions...5

    3.6       Payment of Contributions to Trustee.................................5

    3.7       Vesting of Salary Reduction Contributions...........................5

    3.8       Vesting of Company Matching Contributions...........................5

ARTICLE IV PARTICIPANTS'ACCOUNTS AND INVESTMENT OPTIONS...........................5

    4.1       Participants'Accounts...............................................5

    4.2       Investment Funds....................................................6

    4.3       Allocation of Earnings to Participants'Accounts.....................6

ARTICLE V PAYMENT OF ACCOUNTS.....................................................6

    5.1       Form of Benefit.....................................................6

    5.2       Commencement of Benefit.............................................7

    5.3       Approval of Company.................................................7

    5.4       Source of Benefit Payments..........................................7

    5.5       Payment at Death of Participant.....................................7

    5.6       In-Service Non-Hardship and Hardship Distributions..................8

ARTICLE VI ADMINISTRATION OF THE PLAN.............................................9

    6.1       Administration by the Company.......................................9

    6.2       General Powers of Administration....................................9

</TABLE>


                                      -ii-

<PAGE>   4


<TABLE>

<S>                                                                             <C>
ARTICLE VII AMENDMENT OR TERMINATION.............................................10

    7.1       Amendment or Termination...........................................10

    7.2       Effect of Amendment or Termination.................................10

ARTICLE VIII GENERAL PROVISIONS..................................................10

    8.1       Funding............................................................10

    8.2       General Conditions.................................................10

    8.3       No Guaranty of Benefits............................................10

    8.4       No Enlargement of Employee Rights..................................10

    8.5       Spendthrift Provision..............................................11

    8.6       Applicable Law.....................................................11

    8.7       Small Benefits.....................................................11

    8.8       Incapacity of Recipient............................................11

    8.9       Corporate Successor................................................11

    8.10      Unclaimed Benefit..................................................11

    8.11      Limitations on Liability...........................................12

    8.12      Duties of Participants and Beneficiaries...........................12

ARTICLE IX CHANGE-OF-CONTROL.....................................................12

    9.1       Benefit Rights Upon Change-of-Control..............................12

    9.2       Definition of Change-of-Control....................................12

    9.3       Excess Parachute Payments..........................................13

</TABLE>

                                     -iii-

<PAGE>   5




                                 SPX CORPORATION
                      SUPPLEMENTAL RETIREMENT SAVINGS PLAN
                               FOR TOP MANAGEMENT

         The SPX Corporation Supplemental Retirement Savings Plan For Top
Management (the "Plan") is hereby adopted effective January 1, 1990. The Plan is
established and maintained by SPX Corporation in order to allow a limited number
of top management employees largely responsible for enhancing the earnings and
growth of SPX Corporation to (a) make pre-tax salary reduction contributions,
and (b) to receive Company matching contributions, in each case, excess of those
permitted by the Company's tax-qualified 401(k) plan, known as the "SPX
Corporation Retirement Savings Plan". Accordingly, SPX Corporation hereby adopts
this Plan pursuant to the terms and provisions set forth below.

                                    ARTICLE I
                                   DEFINITIONS


         Wherever used herein the following terms shall have the meanings
hereinafter set forth;

         1.1 "ACCOUNT" means the Participant's interest in the Plan and includes
separate salary reduction and Company matching contributions in each of the
Investment Funds provided by the Plan, as described in Sections 4.1 and 4.2.

         1.2 "ACCOUNTING DATE" means each March 31, June 30, September 30 and
December 31, or any other date selected by the Compensation Committee.

         1.3 "AFFILIATED COMPANY" or "AFFILIATE" means any corporation, trade or
business entity which is a member of a controlled group of corporations, trades
or businesses, or an affiliated service group, of which the Company is also a
member, as provided in Code Sections 414(b), (c), (m) or (o).

         1.4 "BENEFICIARY" means the person, trust or estate designated to
receive the balance of the Participant's Account under this Plan in accordance
with Section 5.5.

         1.5 "BOARD" means the Board of Directors of the Company.

         1.6 "CODE" means the Internal Revenue Code of 1986, as amended from
time to time, and any regulations relating thereto.

         1.7 "COMPANY" means SPX Corporation, a Delaware corporation, or, to the
extent provided in Section 8.9 below, any successor corporation or other entity
resulting 


<PAGE>   6

from a reorganization, merger or consolidation into or with the Company, or a 
transfer or sale of substantially all of the assets of the Company.

         1.8 "COMPENSATION" means the total amount paid to a Participant by the
Company inclusive of bonuses, overtime pay, Regular Pre-Tax Contributions to the
Qualified Plan, Additional Pre-Tax Contributions to the Qualified Plan, and
salary reduction contributions to this Plan, but excluding therefrom:

         (a) amounts deferred for him under the Sealed Power Corporation
Executive Share Unit Plan,

         (b) amounts paid to him under the Sealed Power Corporation Executive
Performance Unit Plan,

         (c) amounts paid to him as foreign service premium and foreign cost of
living allowances,

         (d) amounts paid to him under the Company's Long-Term Disability Plan.

         1.9 "COMPENSATION COMMITTEE" means the Compensation Committee of the
Company's Board of Directors.

         1.10 "EMPLOYEE" means a salaried employee of the Company or of an
Affiliated Company who is a participant under the Qualified Plan (or any
successor or replacement to the Qualified Plan) and is an elected corporate
officer or key executive of the Company.

         1.11 "PARTICIPANT" means an Employee who is eligible to participate in
this Plan pursuant to Article II hereof.

         1.12 "PLAN" means this SPX Corporation Supplemental Retirement Savings
Plan For Top Management.

         1.13 "PLAN YEAR" means the calendar year.

         1.14 "QUALIFIED PLAN" means the SPX Corporation Retirement Savings Plan
and each predecessor, successor or replacement to the said Qualified Plan.

         1.15 "TRUSTEE" means the person or entity chosen by the Company to hold
the assets of this Plan.

         1.16 "CONSTRUCTION". Words in the masculine gender shall include the
feminine and the singular shall include the plural, and vice versa, unless
qualified by the context. Any headings used herein are included for ease of
reference only, and are not to be construed so as to alter the terms hereof.


                                      -2-
<PAGE>   7

                                   ARTICLE II
                                   ELIGIBILITY


         2.1 PARTICIPATION. An Employee shall become a Participant hereunder
upon designation as such by the Compensation Committee. Such designation shall
be made in writing and filed with the records of the Plan. The Compensation
Committee shall promptly notify those employees selected as Participants
hereunder of their participation and shall offer to such Participants the
opportunity to make contributions hereunder, as set forth at Section 3.1 hereof.

         2.2 TOP HAT REQUIREMENTS. No Employee shall be designated as a
Participant hereunder unless the employee qualifies for inclusion in a "select
group of management or highly compensated employees" as defined in Sections
201(2), 301(a)(3), 401(a)(1) and 4021(b) (6) of Employee Retirement Income
Security Act of 1974.

         2.3 REDUCTION IN STATUS; REMOVAL FROM PARTICIPATION. Except in the
event of a Change-of-Control (as defined in Article IX), if the Participant's
compensation or level of responsibility is reduced, the Compensation Committee
may reexamine the Participant's eligibility and make a new determination as to
whether he shall be entitled to continue to contribute as a Participant
hereunder. If an Employee is removed from Participation pursuant to this Section
2.3, he shall make no further contributions to this Plan, nor shall the Company
make any further contributions on his behalf. However, his Account shall
continue to be held for his benefit pursuant to the terms of this Plan, and it
shall continue to share in gains or losses pursuant to Section 4.3 hereof.

                                   ARTICLE III
                           CONTRIBUTIONS AND ACCOUNTS


         3.1 ELECTION TO CONTRIBUTE. A Participant shall elect at the time and
on forms prescribed by the Compensation Committee to have his salary reduction
elections made pursuant to Section 4.2 of the Qualified Plan be recognized with
respect to his Compensation for purposes of creating salary reduction
contributions and Company matching contributions under this Plan.

         Having made such an election, the percentage of Compensation a
Participant has elected to contribute to the Qualified Plan shall be contributed
by the Company to this Plan on a pre-tax salary reduction basis for any Plan
Year with respect to all Compensation as defined by this Plan and earned during
such Plan Year, but subject to the following adjustments:



                                      -3-
<PAGE>   8

         (a) $200,000 Limit. Compensation shall not be limited to $200,000 (as
indexed for inflation) as otherwise provided by Code Section 401(a)(17).

         (b) 415 Limits. Contributions to this Plan shall not be limited by the
operation of benefit or contribution limitations provided by Code Section 415.

         (c) $7,000 Limit. Contributions to this Plan shall not be limited by
the operation of the $7,000 elective salary reduction limit (as indexed for
inflation) as otherwise provided by Code Section 402 (g) .

         (d) 401(k) and 401(m) ADP and ACP Limits. Contributions to this Plan
shall not be subject to the Actual Deferral Percentage limitation of Code
Section 401(k), nor to the Actual Contribution Percentage limitation of Code
Section 401(m).

         (e) Suspension of Elective Contributions. Contributions to this Plan
shall not be suspended as provided for Qualified Plan contributions in Section
6.4 of the Qualified Plan by reason of Non-Hardship or Hardship Distribution
from the Qualified Plan or a Non-Hardship or Hardship Distribution pursuant to
5.6 of this Plan.

         (f) Offset for Qualified Plan Contributions. For any Plan Year,
contributions to this Plan will be reduced by the amount of contributions made
to the Qualified Plan with respect to a Participant to the extent such
contributions are finally allocated to the Participant's Accounts in the
Qualified Plan for the corresponding Plan Year of the Qualified Plan, after
application of the Qualified Plan limitations described in subparagraphs (a)
through (f) above.

         3.2 DURATION OF ELECTION. A Participant's election to contribute to
this Plan as described at Section 3.1 above shall remain in effect until revoked
by the Participant or, if earlier, until the Participant's participation in this
Plan terminates pursuant to Section 2.3 or otherwise.

         3.3 DISPOSITION OF EXCESS CONTRIBUTIONS IN THE QUALIFIED PLAN. In any
case in which a Participant's salary reduction contributions to the Qualified
Plan would be returned to the Participant by reason of the operation of Code
Sections 401(k), 401(m), or 402(g), such contributions shall not be made
available to the Participant, but shall automatically be transferred from the
Qualified Plan to the Participant's Account under this Plan. Such contributions
shall be allocated to the Participant's Account in this Plan for the Plan Year
in which such contributions are deposited in this Plan.

         3.4 COMPANY MATCHING CONTRIBUTIONS. With respect to each Plan Year, the
Company shall contribute 25% of the first 6% of Compensation which a Participant
elects to be recognized and contributed to this Plan pursuant to Section 3.1.



                                      -4-
<PAGE>   9

         Notwithstanding the foregoing, the Company matching contribution to
this Plan will be offset by the amount of Company matching contribution finally
allocated to the Participant's Accounts in the Qualified Plan for the
corresponding Plan Year of the Qualified Plan.

         3.5 ALLOCATION OF SALARY REDUCTION AND COMPANY MATCHING CONTRIBUTIONS.
Both a Participant's salary reduction contributions made pursuant to Section
3.1, and the Company matching contributions made pursuant to Section 3.4, shall
be allocated to a separate account for each Participant as of each Accounting
Date.

         3.6 PAYMENT OF CONTRIBUTIONS TO TRUSTEE. All contributions allocated to
a Participant's Account shall be paid by the Company to the Trustee as soon as
is practical after such amounts have been determined by the Compensation
Committee.

         3.7 VESTING OF SALARY REDUCTION CONTRIBUTIONS. A Participant shall be
fully vested in the salary reduction Contributions made to his Account pursuant
to Section 3.1.

         3.8 VESTING OF COMPANY MATCHING CONTRIBUTIONS. A Participant shall be
fully vested in the Company matching contributions made to his Account pursuant
to Section 3.4,

         (a) PROVIDED that in the event a Participant's employment with the
Company shall terminate under circumstances in which Company Matching
Contributions shall be forfeited for the year of termination of employment
pursuant to Section 4.9 of the Qualified Plan, a corresponding forfeiture of
matching contributions under this Plan shall also occur for such Plan Year, and
PROVIDED FURTHER that

         (b) paragraph 3.8(a) shall not apply to any Participant whose
employment with the Company is terminated under the circumstances described at
Section 9.1(b)(i).

                                   ARTICLE IV
                  PARTICIPANTS' ACCOUNTS AND INVESTMENT OPTIONS


         4.1 PARTICIPANTS' ACCOUNTS. The Compensation Committee shall establish
and maintain a separate account for each Participant which shall accurately
reflect his interest in this Plan. Each Account shall consist of two
sub-Accounts, one for the Participant's salary reduction contributions made to
this Plan pursuant to Section 3.1, and one for the Company matching
contributions made pursuant to Section 3.4. Each Participant shall be advised at
least once each year of the status his Account.



                                      -5-
<PAGE>   10


         4.2 INVESTMENT FUNDS. Subject to approval of the Compensation
Committee, each Participant shall be permitted to direct the manner in which his
Account shall be invested from among such investment options as may be made
available and communicated to Participants from time to time. Each Participant
shall request the percentage of his Account to be invested in each Investment
Fund, provided that not less than 10% of the Participant's contributions and
Company contributions shall be designated for any one such Fund. Within each
Investment Fund, each Participant shall have a separate account to which his
Account and contributions, together with investment gains or losses, shall be
credited.

         Subject to approval of the Compensation Committee, a Participant may
change any such direction as to future contributions as of any Accounting Date
by giving written notice to the Committee by the 10th day of the month prior to
the Accounting Date. Further, a Participant may (subject to Compensation
Committee approval) elect to transfer all or a portion of his Account from any
one Investment Fund to any other Investment Fund as of any Accounting Date by
giving prior written notice to the Committee by no later than the 10th day of
the month prior to the Accounting Date.

         The Compensation Committee shall have unlimited discretion to approve
or disapprove of a Participant's investment directions as described in this
Section 4.2. Should the Compensation Committee disapprove of any such election,
it may direct the Trustee to invest the subject funds in such manner as it shall
deem prudent.

         In cases where the Compensation Committee approves of the Participant's
investment directions, the Committee shall direct the Trustee to invest the
funds accordingly.

         4.3 ALLOCATION OF EARNINGS TO PARTICIPANTS' ACCOUNTS. Each
Participant's Account shall be adjusted as of each Accounting Date to reflect
his earnings, gains and losses in each of the Investment Funds since the last
Accounting Date.

                                    ARTICLE V
                               PAYMENT OF ACCOUNTS


         5.1 FORM OF BENEFIT. At the Participant's election, a Participant's
Account under this Plan shall be paid in one of the following forms:

         (a) In a lump sum.

         (b) In deferred periodic installments payable not more frequently than
monthly, nor less frequently than annually, in an amount to be determined by the
Participant prior to the commencement of benefits. Such payments shall continue
until the Participant's 



                                      -6-
<PAGE>   11


Account is exhausted, (or until his death if a different method of distribution 
is then prescribed pursuant to Section 5.5 hereof). So long as the Participant 
retains funds in his Account, earnings, gains and losses shall be credited to 
the Account. The Participant shall select a form of payment at the time that 
he selects a date for commencement of benefit payments under Section 5.2 hereof.

         5.2 COMMENCEMENT OF BENEFIT. Except in the case of a distribution
permitted by Section 5.6 hereof, or a distribution upon death pursuant to
Section 5.5 hereof, payment of a Participant's Account under this Plan shall
commence subsequent to the Participant's termination of employment with the
Company. Payment will begin not later than 90 days following an Accounting Date
designated by the Participant to the Compensation Committee.

         5.3 APPROVAL OF COMPANY. Notwithstanding the provisions of Sections 5.1
and 5.2 above, an election made by the Participant under the Qualified Plan with
respect to the form of payment or payment commencement date of his Account under
the Qualified Plan shall not be effective with respect to the form of payment or
date for commencement of payment of his Account under this Plan unless such
election is expressly approved in writing by the Compensation Committee. If the
Compensation Committee shall not approve such election in writing, then the form
of payment or date for commencement of payment of the Participant's Account
under this Plan shall be selected by the Company in its sole discretion. The
requirements of this Section 5.3 shall not apply in the event of a
Change-of-Control, as defined in Article IX.

         5.4 SOURCE OF BENEFIT PAYMENTS. Any Account payable to a Participant or
a Participant's Beneficiary shall be paid from the trust created pursuant to the
SPX Corporation Trust Agreement for Supplemental Retirement Savings Plan for Top
Management.

         5.5 PAYMENT AT DEATH OF PARTICIPANT. In the event a Participant dies
before payment of his Account under this Plan commences, or in the event a
Participant dies after such payment commences but before he has received the
entire balance in his Account, payment of such Participant's Account under this
Plan shall commence at the time, in the form, and to the Beneficiary designated
to the Compensation Committee by the Participant. So long as an Account remains
in this Plan with respect to a Participant, that Account shall continue to be
credited with earnings, gains and losses.

         Upon becoming a Participant, every Participant shall have the right to
designate a beneficiary or beneficiaries to receive his interest in the Plan in
the event of his death. The designation shall specify the share to be received
by each beneficiary and shall indicate how any remaining balance is to be paid
in the event of the death of the designated beneficiary or beneficiaries. Such
designation of a beneficiary or beneficiaries may be changed from time to time
by the Participant by filing a new designation with the 



                                      -7-
<PAGE>   12

Compensation Committee. If any Participant shall fail to designate a 
beneficiary, or if all beneficiaries predecease the Participant, any 
nonforfeitable balance in the account shall be paid within a reasonable time 
to the first surviving class, and in equal shares if there are more than one 
in each class, of the following classes of successive preference beneficiaries:

     -                 Participant's widow or widower
     -                 Surviving children (including legally-adopted children)
     -                 Surviving parents
     -                 Surviving brothers and sisters
     -                 Personal Representative or Administrator.

If any beneficiary survives the Participant but fails to collect all amounts
payable on behalf of the beneficiary from the Participant's Account, then unless
the Participant has otherwise directed, the balance shall be paid to the
beneficiary's estate. A Participant's designation of beneficiary shall be made
on a form prescribed by, provided by, and filed with the Compensation Committee.

         5.6 IN-SERVICE NON-HARDSHIP AND HARDSHIP DISTRIBUTIONS. A Participant
may request a distribution prior to termination of employment with the Company
in the circumstances described below, provided that such distribution shall not
be made unless the Participant's request is expressly approved in writing by the
Compensation Committee. If the Compensation Committee shall not approve such
election in writing, then such request for distribution shall be granted or
denied by the Company in its sole discretion.

         (a) Non-Hardship Distribution. A Participant may request not more than
twice per Plan Year a distribution of all or any portion of his Account under
the Plan upon written notice received by the Compensation Committee at least 30
days prior to any Accounting Date. If the Participant's request is granted, the
distribution shall be paid over to him within 90 days following such Accounting
Date.

         If the balance in the Participant's Account is less than $5,000 the
entire amount must be distributed. If the Account exceeds $5,000 a partial
withdrawal of at least $2,500 may be made. Payment shall be made in a lump sum.

         (b) Hardship Distributions. For purposes of this Section, a
distribution is on account of Hardship only if the distribution both is (1) made
to a Participant who is employed by the Company as of the date the distribution
is made, (2) made on account of an immediate and heavy financial need of the
Participant and (3) is necessary to satisfy such financial need.



                                      -8-
<PAGE>   13

         (i) Deemed Immediate and Heavy Financial Need. A distribution will be
         deemed to be made on account of an immediate and heavy financial need
         of the Participant if the distribution is on account of:

                  (1) Medical expenses described in section 213(d) incurred by
         the Participant, the Participant's spouse, or any dependents of the
         Participant (as defined in section 152);

                  (2) Purchase (excluding mortgage payments) of a principal
         residence for the Participant; or

                  (3) Payment of tuition for the next semester or quarter of
         post-secondary education for the Participant, his or her spouse,
         children, or dependents.

                  (4) The need to prevent the eviction of the Participant from
         his principal residence or foreclosure on the mortgage of the
         Participant's principal residence.

         (ii) Distribution Deemed Necessary to Satisfy Financial Need. A
         distribution will be deemed to be necessary to satisfy an immediate and
         heavy financial need of a Participant if the distribution is not in
         excess of the amount of the immediate and heavy financial need of the
         Participant.

         (iii) Payment. Payment of a Hardship Distribution shall be made in a
         lump sum within 90 days of the Accounting Date which first follows the
         date the Compensation Committee approves such distribution.

                                   ARTICLE VI
                           ADMINISTRATION OF THE PLAN


         6.1 ADMINISTRATION BY THE COMPANY. The Company, acting through the
Compensation Committee of its Board of Directors, shall be responsible for the
general operation and administration of the Plan and for carrying out the
provisions thereof.

         6.2 GENERAL POWERS OF ADMINISTRATION. All provisions set forth in the
Qualified Plan with respect to the administrative powers and duties of the
Company, expenses of administration, and procedures for filing claims shall also
be applicable with respect to the Plan. The Company shall be entitled to rely
conclusively upon all tables, valuations, certificates, opinions and reports
furnished by any actuary, accountant, controller, counsel or other person
employed or engaged by the Company with respect to the Plan.




                                      -9-
<PAGE>   14

                                   ARTICLE VII
                            AMENDMENT OR TERMINATION


         7.1 AMENDMENT OR TERMINATION. The Company intends the Plan to be
permanent but reserves the right, subject to Article IX, to amend or terminate
the Plan when, in the sole opinion of the Company, such amendment or termination
is advisable. Any such amendment or termination shall be made pursuant to a
resolution of the Board and shall be effective as of the date of such resolution
or as specified therein.

         7.2 EFFECT OF AMENDMENT OR TERMINATION. No amendment or termination of
the Plan shall directly or indirectly deprive any current or former Participant
or Beneficiary of an Account balance which has accrued under this Plan prior to
the effective date of such amendment or termination.

                                  ARTICLE VIII
                               GENERAL PROVISIONS


         8.1 FUNDING. The Plan at all times shall be entirely unfunded and the
Company shall not be required at any time to segregate any assets of the Company
for payment of any benefits hereunder. No Participant, Beneficiary or any other
person shall have any interest in any particular assets of the Company by reason
of the right to receive a benefit under the Plan and any such Participant,
Beneficiary or other person shall have only the rights of a general unsecured
creditor of the Company with respect to any rights under the Plan.

         8.2 GENERAL CONDITIONS. Except as otherwise expressly provided herein,
all terms and conditions of the Qualified Plan applicable to an Account payable
after the death of a Participant shall also be applicable to the Participant's
Account payable hereunder. Any Qualified Plan Accounts payable under the
Qualified Plan shall be paid solely in accordance with the terms and conditions
of the Qualified Plan and nothing in this Plan shall operate or be construed in
any way to modify, amend or affect the terms and provisions of the Qualified
Plan.

         8.3 NO GUARANTY OF BENEFITS. Nothing contained in the Plan shall
constitute a guaranty by the Company or any other entity or person that the
assets of the Company will be sufficient to pay any benefit hereunder.

         8.4 NO ENLARGEMENT OF EMPLOYEE RIGHTS. No Participant or Beneficiary
shall have any right to a benefit under the Plan except in accordance with the
terms of the Plan. 



                                      -10-
<PAGE>   15

Establishment of the Plan shall not be construed to give any Participant the 
right to be retained in the service of the Company.

         8.5 SPENDTHRIFT PROVISION. No interest of any person or entity in, or
right to receive a benefit under, the Plan shall be subject in any manner to
sale, transfer, assignment, pledge, attachment, garnishment, or other alienation
or encumbrance of any kind; nor may such interest or right to receive a benefit
be taken, either voluntarily or involuntarily, for the satisfaction of the debts
of, or other obligations or claims against, such person or entity, including
claims for alimony, support, separate maintenance and claims in bankruptcy
proceedings.

         8.6 APPLICABLE LAW. The Plan shall be construed and administered under
the laws of the State of Michigan.

         8.7 SMALL BENEFITS. If at any time an Account is payable under this
Plan the value of such Account is less than $3,500, the Company may pay such
Account to the Participant or Beneficiary in a single lump sum in lieu of any
further benefit payments hereunder.

         8.8 INCAPACITY OF RECIPIENT. If any person entitled to a benefit
payment under the Plan is deemed by the Company to be incapable of personally
receiving and giving a valid receipt for such payment, then, unless and until
claim therefor shall have been made by a duly appointed guardian or other legal
representative of such person, the Company may provide for such payment or any
part thereof to be made to any other person or institution then contributing
toward or providing for the care and maintenance of such person. Any such
payment shall be a payment for the account of such person and a complete
discharge of any liability of the Company and the Plan therefor.

         8.9 CORPORATE SUCCESSOR. The Plan shall not be automatically terminated
by a transfer or sale of assets of the Company or by the reorganization, merger
or consolidation of the Company into or with any other corporation or other
entity, but the Plan shall be continued after such transfer, sale,
reorganization, merger or consolidation only if and to the extent that the
transferee, purchaser or successor entity agrees to continue the Plan, except as
set forth in Article IX. In the event that the Plan is not continued by the
transferee, purchaser or successor entity, then the Plan shall terminate subject
to the provisions of Section 7.2.

         8.10 UNCLAIMED BENEFIT. Each Participant shall keep the Company
informed of his current address. The Company shall not be obligated to search
for the whereabouts of any person. If the location of a Participant is not made
known to the Company within three (3) years after the date on which payment of
the Participant's Account may first be made, payment may be made as though the
Participant had died at the end of the three-year period. If, within one
additional year after such three-year period has elapsed, or, within three years
after the actual death of a Participant, the Company is unable to 




                                      -11-
<PAGE>   16

locate any Beneficiary for the Participant, then the Company shall have no 
further obligation to pay any benefit hereunder to such Participant or 
Beneficiary or any other person and such benefit shall be irrevocably forfeited.

         8.11 LIMITATIONS ON LIABILITY. Notwithstanding any of the preceding
provisions of the Plan, neither the Company nor any individual acting as an
employee or agent of the Company shall be liable to any Participant, former
Participant, Beneficiary or any other person for any claim, loss, liability or
expense incurred in connection with the Plan.

         8.12 DUTIES OF PARTICIPANTS AND BENEFICIARIES. The Participant and any
Beneficiaries of a Participant shall, as a condition of receiving benefits under
this Plan, be obligated to provide the Compensation Committee with such
information as the Compensation Committee shall require in order to determine
Account Balances and calculate benefits under this Plan.

                                   ARTICLE IX
                                CHANGE-OF-CONTROL


         9.1 BENEFIT RIGHTS UPON CHANGE-OF-CONTROL.

                  (a) Notwithstanding any other provision of the Plan to the
contrary, in the event of a Change-of-Control, the Company or any successor
shall be prohibited from amending or terminating the Plan in any manner so as to
deprive, directly or indirectly, any current or former Participant or
Beneficiary of all or any portion of any Account which has accrued under this
Plan prior to the effective date of such amendment or termination.

                  (b)(i) Each Participant whose employment terminates and who
qualifies for Severance Benefits as defined in the Executive Severance
Agreements designated by the Compensation Committee of the Board of Directors of
the Company, or (ii) in the event that the Plan is terminated following a
Change-of-Control, each current or former Participant (or Beneficiary, if
applicable), shall be paid immediately the value of the Participant's Account
under this Plan.

                  (c) The benefit rights of any Participant under this Plan
shall be determined only after taking into account the effect of any Severance
Agreement between the Company and the Participant.

         9.2 DEFINITION OF CHANGE-OF-CONTROL. A Change-of-Control of the Company
shall be deemed to have occurred if:



                                      -12-
<PAGE>   17

         (a) any person, entity or group (within the meaning of Sections 13(d)
and 14(d) of the Securities Exchange Act of 1934, as amended (the "Exchange
Act")), excluding, for this purpose, the Company or its subsidiaries, or any
employee benefit plan of the Company or its subsidiaries which acquires
beneficial ownership of voting securities of the Company, is or becomes the
"beneficial owner" (as defined in Rule 13d-3 under the Exchange Act), directly
or indirectly, of securities of the Company representing twenty percent (20%) or
more of the combined voting power of the Company's then outstanding securities;

         (b) during any period of two (2) consecutive years (not including any
period prior to the effective date of this Plan), individuals who at the
beginning of such two-year period constitute the Board of Directors of the
Company and any new director (except for a director designated by a person who
has entered into an agreement with the Company to effect a transaction described
elsewhere in this Section 9.2) whose election by the Board or nomination for
election by the Company's shareholders was approved by a vote of at least
two-thirds (2/3) of the directors then still in office who either were directors
at the beginning of the period or whose election or nomination for election was
previously approved, cease for any reason to constitute at least a majority
thereof; or

         (c) the shareholders of the Company approve a plan of complete
liquidation of the Company, an agreement for the sale or disposition by the
Company of all or substantially all of the Company's assets, or a plan of
reorganization, merger or consolidation of the Company with any other
corporation, except for a reorganization, merger or consolidation in which the
security owners of the Company immediately prior to the reorganization, merger
or consolidation continue to own at least eighty percent (80%) of the voting
securities of the new (or continued) entity immediately after such
reorganization, merger or consolidation.

         9.3 EXCESS PARACHUTE PAYMENTS. If any portion of the payments required
by this Plan (in the aggregate, "Total Payments") will be subject to the golden
parachute "Excise Tax" imposed by Section 4999 of the Internal Revenue Code of
1986, as amended (the "Code"), the Company shall pay to the Participant an
additional amount (the "Gross-Up Payment") such that the net amount retained by
him after deduction of any Excise Tax (but not any federal, state or local
income tax) on the Total Payments, and any Federal, state and local income tax
and Excise Tax upon the payment provided for by this Section 9.3, shall be equal
to the Total Payments. The determination of whether any Excise Tax will be
imposed and of the amount of the Gross-Up Payment will be made by tax counsel
selected by the Company's independent auditors and acceptable to the
Participant. For purposes of determining whether any of the Total Payments will
be subject to the Excise Tax and the amount of such Excise Tax, (A) any other
payments or benefits received or to be received by such Participant in
connection with a Change-of-Control of the Company or his termination of
employment (if any) shall be treated as "parachute payments" within the meaning
of Section 280G(b)(2) of the Code, and all 



                                      -13-
<PAGE>   18

"excess parachute payments" within the meaning of Section 280G(b)(1) shall be
treated as subject to the Excise Tax, unless in the opinion of such tax counsel
such other payments or benefits (in whole or in part) do not constitute
parachute payments, or such excess parachute payments (in whole or in part)
represent reasonable compensation for services actually rendered within the
meaning of Section 280G(b)(4)(B) of the Code, and (B) the value of any non-cash
benefits or any deferred payment or benefit shall be determined by the Company's
independent auditors in accordance with the principles of Sections 280G(d)(3)
and (4) of the Code. For purposes of determining the amount of the Gross-Up
Payment, such Participant shall be deemed to pay federal income taxes at the
highest marginal rate of federal income taxation in the calendar year in which
the Gross-Up Payment is to be made and state and local taxes at the highest
marginal rates of taxation in the state and locality of his residence on his
employment termination date as effective in the calendar year in which the
Gross-Up Payment is to be made, net of the maximum reduction in federal income
taxes which could be obtained from deduction of such state and local taxes.

         The payments provided for in this Section 9.3 shall be made not later
than thirty (30) calendar days following the termination of the Plan or the
Participant's termination of employment, as applicable; provided, however, that
if the amounts of such payments cannot be finally determined on or before such
day, the Company shall pay the Participant on such day an estimate, as
determined in good faith by such tax counsel, of the minimum amount of such
payments and shall pay the remainder of such payments (together with interest at
the rate provided in Section 1274(b)(2)(B) of the Code) as soon as the amount
thereof can be determined but in no event later than sixty (60) calendar days
after the termination of the Plan or the Participant's termination of
employment, as applicable. In the event that the amount of the estimated payment
exceeds the amount subsequently determined to have been due, such excess shall
constitute a loan by the Company to such Participant payable on the twentieth
(20th) calendar day after demand by the Company (together with interest at the
rate provided in Section 1274(b)(2)(B) of the Code).



         IN WITNESS WHEREOF, the Company has adopted the SPX Corporation
Supplemental Retirement Savings Plan for Top Management effective January 1,
1990.


ATTEST:                                          SPX Corporation

By                                               By /s/ DONALD JOHNSON
  --------------------------                       -----------------------------
Its                                              Its  Corporate Treasurer
   -------------------------                        ----------------------------


                                      -14-

<PAGE>   1
 
                                                                   EXHIBIT 23(i)
 
                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS
 
     As independent public accountants, we hereby consent to the incorporation
by reference in this registration statement of our report dated February 5, 1998
(except with respect to the matter discussed in Note 17, as to which the date is
February 17, 1998), included in SPX Corporation's Form 10-K for the year ended
December 31, 1997, and to all references to our Firm included in or made a part
of this registration statement.
 
                                          ARTHUR ANDERSEN LLP
 
Chicago, Illinois
   
September 1, 1998
    

<PAGE>   1
 
                                                                  EXHIBIT 23(ii)
 
                        CONSENT OF INDEPENDENT AUDITORS
 
   
     We consent to the reference to our firm under the caption "Experts" in
Amendment No. 1 to Registration Statement (Form S-4) of SPX Corporation for the
registration of 18,390,362 shares of its common stock.
    
 
     We also consent to the incorporation by reference therein of our report
dated January 23, 1998 with respect to the financial statements and schedule of
General Signal Corporation for the years ended December 31, 1997, 1996, and 1995
included in the General Signal Corporation Annual Report (Form 10-K) for 1997
filed with the Securities and Exchange Commission.
 
                                          ERNST & YOUNG LLP
 
Stamford, Connecticut
   
August 31, 1998
    

<PAGE>   1
                                                                 EXHIBIT 23(iii)

                [LETTERHEAD OF WACHTELL, LIPTON, ROSEN & KATZ]



                                   CONSENT OF
                        WACHTELL, LIPTON, ROSEN & KATZ

         We hereby consent to the reference to our firm under the headings
"CERTAIN FEDERAL INCOME TAX CONSEQUENCES OF THE MERGER" and "LEGAL MATTERS"
in the Joint Proxy Statement/Prospectus that is a part of the Registration
Statement on Form S-4 of SPX Corporation filed with the Securities and Exchange
Commission (the "Commission") on the date hereof.  In giving this consent, we
do not hereby admit that we are within the category of persons whose consent is
required under Section 7 of the Securities Act of 1933, as amended, and the
rules and regulations of the Commission thereunder.

                                                  Very truly yours,



                                                  /s/ WACHTELL, LIPTON, ROSEN
                                                       & KATZ


Dated: September 3, 1998

<PAGE>   1
                                                                EXHIBIT 99(i)

[SPX CORPORATION LOGO]














- --------------------------------------------------------------------------------

                               SPX CORPORATION
               SPECIAL MEETING OF STOCKHOLDERS, OCTOBER 5, 1998
THIS PROXY IS BEING SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS OF THE COMPANY

        The undersigned stockholder of SPX Corporation, a Delaware corporation
(the "Company"), hereby appoints John B. Blystone, Patrick J. O'Leary and
Christopher J. Kearney, or any one of them, as proxies and attorneys-in-fact of
the undersigned, with full power of substitution, to vote all shares of common
stock, par value $10.00 per share, of the Company ("Common Stock") which the
undersigned is entitled to vote at the Special Meeting of Stockholders of the
Company to be held on October 5, 1998 at 10 a.m. (Eastern Time), at the offices
of Fried, Frank, Harris, Shriver & Jacobson, One New York Plaza, 27th Floor,
New York, New York, and at any adjournments or postponements thereof as
directed below.

        THIS PROXY, WHEN PROPERLY EXECUTED, WILL BE VOTED IN THE MANNER
DIRECTED HEREIN BY THE UNDERSIGNED STOCKHOLDER. IF NO DIRECTION IS MADE, THIS
PROXY WILL BE VOTED "FOR" PROPOSAL 1 AND PROPOSAL 2, AND IN THE DISCRETION OF
THE PROXY HOLDER AS TO ANY OTHER MATTER THAT MAY COME BEFORE THE SPECIAL
MEETING OF STOCKHOLDERS OR ANY ADJOURNMENTS OR POSTPONEMENTS THEREOF. Any proxy
heretofore given to vote said shares is hereby revoked.

(Continued and to be signed on other side.)

                                                SPX CORPORATION
                                                P.O. BOX  11117
                                                NEW YORK, N.Y.  10203-0117
<PAGE>   2
[SPX CORPORATION LOGO]

                                                SPECIAL MEETING OF STOCKHOLDERS
                                                 TO BE HELD ON OCTOBER 5, 1998


















                            DETACH PROXY CARD HERE
- --------------------------------------------------------------------------------

[  ]

<TABLE>
<CAPTION>
<S>                                                                            <C>
                             THE BOARD OF DIRECTORS RECOMMENDS A VOTE "FOR" THE APPROVAL OF PROPOSALS 1 AND 2.

1.  Proposal to approve the issuance of shares of Common Stock in the merger   2.  Proposal to approve the amendment to the 1992
    of General Signal Corporation with and into SAC Corp., a wholly owned          Stock Compensation Plan increasing the number
    subsidiary of the Company, in accordance with the Agreement and Plan of        of shares of Common Stock issuable under such
    Merger, dated as of July 19, 1998, among the Company, SAC Corp. and            plan by 1.1 million.   
    General Signal Corporation.

                                                                                   FOR    [X]      AGAINST    [X]    ABSTAIN   [X] 

    FOR    [X]      AGAINST    [X]    ABSTAIN   [X]


                                                                                                       Change of Address and
                                                                                                       or Comments Mark Here [X]


Please sign exactly as name appears below. When shares are held by joint tenants, both should sign.  When signing as attorney, 
executor, administrator, trustee or guardian, please give full title as such.  If a corporation, please sign in full corporate
name by President or other authorized officer.  If a partnership, please sign in partnership name by authorized person.

                                                                                            The undersigned acknowledges receipt of
                                                                                            the Notice of Special Meeting and the
                                                                                            Joint Proxy Statement/Prospectus (with
                                                                                            all enclosures and attachments) relating
                                                                                            to the Special Meeting.

                                                                                            Dated:_________________________ 1998
                                                                                            ____________________________________
                                                                                            Signature (and title if applicable)
                                                                                            ____________________________________
                                                                                            Signature (if held jointly)

                                                                                            Votes MUST be indicated (x) in
                                                                                            Black or Blue ink.


PLEASE VOTE, SIGN, DATE AND PROMPTLY RETURN THIS CARD USING THE ENCLOSED ENVELOPE.
</TABLE>





<PAGE>   1
                                                                 EXHIBIT 99(ii)


                          GENERAL SIGNAL CORPORATION
       ONE HIGH RIDGE PARK, P.O. BOX 10010, STAMFORD, CONNECTICUT 06904

                        PROXY/VOTING INSTRUCTION CARD
                        -----------------------------

                       SPECIAL MEETING--OCTOBER 5, 1998

         THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS

          This undersigned stockholder hereby appoints MICHAEL D. LOCKHART,
RICHARD F. ZANNINO and JOANNE L. BOBER, and each of them, with full power of
substitution, the proxies and attorneys of the undersigned to vote all shares
of Common Stock which the undersigned is entitled to vote at the Special
Meeting of Stockholders of General Signal Corporation (the "Special Meeting")
to be held on October 5, 1998 (or any adjournment or postponements thereof)
upon the Proposal described in the accompanying Notice of Special Meeting and
Joint Proxy Statement/Prospectus, as set forth on the reverse hereof, and in
their discretion as to such other business as may properly come before the 
Special Meeting or any adjournment or postponement thereof.

     THE SHARES REPRESENTED HEREBY WILL BE VOTED IN THE MANNER DIRECTED HEREIN
WITH RESPECT TO PROPOSAL 1 ON THE REVERSE SIDE OF THIS CARD, AND IN THE
DISCRETION OF THE PROXIES AS TO ANY OTHER MATTER ARISING AT THE SPECIAL
MEETING. IF NO INSTRUCTION IS GIVEN, THE SHARES WILL BE VOTED "FOR" PROPOSAL 1.

                                *   *   *   *

     FOR PARTICIPANTS IN THE GENERAL SIGNAL CORPORATION SAVINGS AND STOCK
OWNERSHIP PLAN OR THE GENERAL SIGNAL LIMITED SAVINGS AND STOCK OWNERSHIP PLAN
(THE "PLAN"):

  As to those shares of Common Stock, if any, that are held for me in the
  Plans, I instruct the Trustee of the applicable Plan to sign a
  proxy for me in substantially the form set forth above and on the reverse
  side.  THE TRUSTEE SHALL MARK THE PROXY CARD AS I SPECIFY. WHERE I DO NOT
  SPECIFY A CHOICE, MY SHARES SHALL BE VOTED IN THE SAME PROPORTION AS THE
  TRUSTEE VOTES THE SHARES FOR WHICH THE TRUSTEE RECEIVES INSTRUCTIONS.

  Your voting instructions will be held in strictest confidence.
  
              (Continued, and to be marked, dated and signed on the other side.)
<PAGE>   2
[X] PLEASE MARK YOUR
    VOTES AS INDICATED
    IS THE EXAMPLE.

- --------------------------------------------------------------------------------
          THE BOARD OF DIRECTORS RECOMMENDS A VOTE "FOR" PROPOSAL 1
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
<S><C>
1.  To approve and adopt the Agreement and Plan of Merger dated as of July  19, 1998 among SPX            FOR           AGAINST
    Corporation, a Delaware corporation ("SPX"), SAC Corp., a Delaware corporation and wholly owned      /  /            /  /  
    subsidiary of SPX ("Merger Sub"), and General Signal pursuant to which General Signal will merge
    with and into Merger Sub, and the separate corporate existence of General Signal will cease.

    Please check if you want your voting instructions to be confidential pursuant to General Signal's     YES             NO   
    confidential voting policy described in the accompanying Joint Proxy Statement/Prospectus.           /  /            /  / 

                                                                                                                            
                                                                                 PLEASE SIGN EXACTLY AS YOUR NAME           
                                                                                 APPEARS HEREON, DATE AND                   
                                                                                 PROMPTLY RETURN THIS PROXY IN              
                                                                                 THE ENCLOSED ENVELOPE.  JOINT              
                                                                                 OWNERS SHOULD EACH SIGN.  WHEN SIGNING AS  
                                                                                 AN ATTORNEY, EXECUTOR, ADMINISTRATOR,      
                                                                                 TRUSTEE OR GUARDIAN, PLEASE GIVE FULL TITLE


                                                                                 ___________________________________________
                                                                                                   Signature(s)

                                                                                 Dated: _______________________________, 1998

                                                                                 By: ________________________________________
                                           
                                                
                                                
                                                
                                                
                                                
                                                
                                                









</TABLE>






<PAGE>   1
 
                   FORM OF ELECTION AND LETTER OF TRANSMITTAL
 
         To accompany certificates representing shares of common stock
   
          ("General Signal Common Stock"), par value $1.00 per share,
    
                                       of
     GENERAL SIGNAL CORPORATION, A NEW YORK CORPORATION ("GENERAL SIGNAL")
 
   
when submitted in connection with an election to receive (i) cash, (ii) shares
of common stock, par value $10.00 per share ("SPX Common Stock"), of SPX
Corporation, a Delaware corporation ("SPX"), or (iii) a combination of cash and
shares of SPX Common Stock pursuant to the Agreement and Plan of Merger dated as
of July 19, 1998 (the "Merger Agreement") among SPX, SAC Corp., a Delaware
corporation and a wholly owned subsidiary of SPX ("MergerSub"), and General
Signal, pursuant to which General Signal will be merged with and into MergerSub
(the "Merger"). All references herein to SPX Common Stock and General Signal
Common Stock shall include the preferred stock purchase rights associated with
such common stock.
    
 
                     The Exchange Agent for the Merger is:
 
                              THE BANK OF NEW YORK
 
   
<TABLE>
<S>                              <C>                              <C>
           BY MAIL:                  FACSIMILE TRANSMISSION:       BY HAND OR OVERNIGHT COURIER:
 Tender & Exchange Department      (for Eligible Institutions      Tender & Exchange Department
        P.O. Box 11248                        only)                     101 Barclay Street
     Church Street Station               (212) 815-6213             Receive and Deliver Window
 New York, New York 10286-1248                                       New York, New York 10286
</TABLE>
    
 
                          For Confirmation Telephone:
                                 (800) 507-9357
 
   
     DELIVERY OF THIS FORM OF ELECTION AND LETTER OF TRANSMITTAL TO AN ADDRESS
OTHER THAN AS SET FORTH ABOVE OR TRANSMISSION OF THIS FORM OF ELECTION AND
LETTER OF TRANSMITTAL VIA A FACSIMILE TO A NUMBER OTHER THAN AS SET FORTH ABOVE
WILL NOT CONSTITUTE A VALID DELIVERY TO THE EXCHANGE AGENT.
    
 
                    The Information Agent for the Merger is:
 
                             D.F. KING & CO., INC.
                                77 Water Street
                            New York, New York 10005
                Banks and Brokers Call: (212) 269-5550 (Collect)
                  All Others Call: (800) 549-6746 (Toll-Free)
 
   
     TO BE EFFECTIVE, THIS FORM OF ELECTION AND LETTER OF TRANSMITTAL, TOGETHER
WITH YOUR STOCK CERTIFICATES (OR A GUARANTEE OF DELIVERY OF SUCH STOCK
CERTIFICATES AS SET FORTH IN GENERAL INSTRUCTION 7), MUST BE RECEIVED BY THE
EXCHANGE AGENT BEFORE THE ELECTION DEADLINE SPECIFIED BELOW.
    
- --------------------------------------------------------------------------------
    BOX A: ELECTION AND DESCRIPTION OF SHARES OF GENERAL SIGNAL COMMON STOCK
        (Attach additional sheets if necessary; check one Election only)
   
         See "Special Election Instructions" and General Instruction 3.
    
 
                                  CHOOSE ONE:
 
   [ ] STOCK ELECTION  [ ] CASH ELECTION  [ ] MIXED ELECTION  [ ] NON-ELECTION
   
- --------------------------------------------------------------------------------
 
<TABLE>
<S>                                                          <C>                     <C>
                                                                                        NUMBER OF SHARES
                                                                                         REPRESENTED BY
          NAME AND ADDRESS OF REGISTERED HOLDER(S)                                      EACH CERTIFICATE
       (PLEASE FILL IN, IF BLANK, EXACTLY AS NAME(S)               CERTIFICATE          (OR COVERED BY A
                APPEARS ON CERTIFICATE(S))*                         NUMBER**         GUARANTEE OF DELIVERY)
- ------------------------------------------------------------------------------------------------------------
 
                                                             -----------------------------------------------
 
                                                             -----------------------------------------------
 
                                                             -----------------------------------------------
 
                                                             -----------------------------------------------
 
                                                             -----------------------------------------------
                                                             TOTAL NUMBER OF SHARES
- ------------------------------------------------------------------------------------------------------------
  * In the case of a delivery using the Guarantee of Delivery procedures, exactly as name(s) will appear on
    the certificate(s) when  delivered.
 ** Certificate numbers are not required if certificates will be delivered using the Guarantee of Delivery
    procedures.
- ------------------------------------------------------------------------------------------------------------
</TABLE>
    
<PAGE>   2
 
                 BOX B: DIVIDEND REINVESTMENT PLAN PARTICIPANTS
 
   
If you are a participant in the General Signal Dividend Reinvestment Plan (the
"DRP"), please check this box [ ].
    
   
Participants in the DRP do not need to send their stock certificates with
respect to their DRP shares. See General Instruction 13.
    
 
   
 PLEASE READ THE SPECIAL ELECTION INSTRUCTIONS AND THE GENERAL INSTRUCTIONS IN
THIS FORM OF ELECTION AND LETTER OF TRANSMITTAL CAREFULLY BEFORE COMPLETING THIS
                   FORM OF ELECTION AND LETTER OF TRANSMITTAL
    
 
   
     THE ELECTION DEADLINE IS 5:00 P.M. (EASTERN TIME) ON OCTOBER 2, 1998. A
COMPLETED FORM OF ELECTION AND LETTER OF TRANSMITTAL, TOGETHER WITH YOUR GENERAL
SIGNAL STOCK CERTIFICATES OR A GUARANTEE OF DELIVERY (EACH AS DEFINED BELOW),
MUST BE RECEIVED BY THE EXCHANGE AGENT PRIOR TO THE ELECTION DEADLINE IN ORDER
FOR ANY CASH ELECTION, STOCK ELECTION OR MIXED ELECTION (EACH AS DEFINED BELOW)
MADE HEREBY TO BE EFFECTIVE. IF A PROPERLY COMPLETED FORM OF ELECTION AND LETTER
OF TRANSMITTAL, TOGETHER WITH YOUR GENERAL SIGNAL STOCK CERTIFICATES OR A
GUARANTEE OF DELIVERY, IS NOT RECEIVED BY THE EXCHANGE AGENT PRIOR TO THE
ELECTION DEADLINE, YOU WILL BE DEEMED TO HAVE MADE A NON-ELECTION WITH RESPECT
TO YOUR SHARES, AND THE FORM OF MERGER CONSIDERATION (AS DEFINED BELOW) WHICH
YOU WILL BE ENTITLED TO RECEIVE WILL BE DETERMINED BY THE PROVISIONS OF THE
MERGER AGREEMENT. IF YOU FAIL TO INDICATE A CASH ELECTION, STOCK ELECTION OR
MIXED ELECTION IN BOX A ABOVE YOU WILL BE DEEMED TO HAVE INDICATED A
NON-ELECTION. IF YOUR GENERAL SIGNAL STOCK CERTIFICATES ARE NOT AVAILABLE AT THE
TIME YOU SEND A FORM OF ELECTION AND LETTER OF TRANSMITTAL TO THE EXCHANGE
AGENT, YOU MAY INSTEAD PROVIDE A GUARANTEE OF DELIVERY OF YOUR GENERAL SIGNAL
STOCK CERTIFICATES AS SET FORTH IN GENERAL INSTRUCTION 7, IN WHICH CASE YOU
MUST, WITHIN THREE TRADING DAYS ON THE NEW YORK STOCK EXCHANGE, INC. ("NYSE")
THEREAFTER, DELIVER TO THE EXCHANGE AGENT THE GENERAL SIGNAL STOCK CERTIFICATES
REPRESENTING THE SHARES IN RESPECT OF WHICH AN ELECTION IS BEING MADE.
    
 
   
     Copies of the Joint Proxy Statement/Prospectus of SPX and General Signal
dated September 3, 1998, relating to the Merger (the "Joint Proxy
Statement/Prospectus), as well as extra copies of this Form of Election and
Letter of Transmittal, may be requested from D.F. King & Co., Inc., the
Information Agent, at the toll-free phone number shown on the cover, or from the
Exchange Agent at the addresses or the toll-free number shown on the cover. The
return of this Form of Election and Letter of Transmittal to the Exchange Agent
is acknowledgment of the receipt of the Joint Proxy Statement/Prospectus.
    
 
   
     If your General Signal Stock Certificate(s) have been lost, stolen or
destroyed and you require assistance in replacing them, see General Instruction
12 below. You cannot submit an effective Form of Election and Letter of
Transmittal without enclosing your General Signal Stock Certificate(s) or a
Guarantee of Delivery with this Form of Election and Letter of Transmittal. If
you submit a Guarantee of Delivery, your General Signal Stock Certificates must
be delivered within three NYSE trading days thereafter. Therefore, if you wish
to make an Election, it is critical that you act immediately to obtain
replacement stock certificates.
    
 
   
     COMPLETING AND RETURNING THIS FORM OF ELECTION DOES NOT HAVE THE EFFECT OF
CASTING A VOTE WITH RESPECT TO APPROVAL OF THE MERGER OR THE MERGER AGREEMENT AT
THE GENERAL SIGNAL SPECIAL MEETING (AS DEFINED BELOW). TO VOTE AT THE GENERAL
SIGNAL SPECIAL MEETING, YOU MUST COMPLETE, SIGN AND RETURN THE PROXY CARD THAT
ACCOMPANIED THE JOINT PROXY STATEMENT/PROSPECTUS, OR YOU MUST ATTEND THE GENERAL
SIGNAL SPECIAL MEETING IN PERSON AND VOTE YOUR SHARES THEREAT. IF YOU HAVE ANY
QUESTIONS CONCERNING THE VOTING OF YOUR SHARES OF GENERAL SIGNAL COMMON STOCK,
PLEASE CALL THE INFORMATION AGENT TOLL-FREE AT (800) 549-6746.
    
<PAGE>   3
 
Ladies and Gentlemen:
 
   
     Pursuant to the Merger Agreement and subject to the proration procedures
included therein and described in the Joint Proxy Statement/Prospectus, the
undersigned hereby surrenders to The Bank of New York, as Exchange Agent,
certificate(s) representing all of the shares of General Signal Common Stock
(each such certificate, a "General Signal Stock Certificate") listed in Box A
above and (A) hereby elects, in the manner indicated in Box A above, to have
each of such shares of General Signal Common Stock represented by such General
Signal Stock Certificates converted into the right to receive EITHER (i) $45.00
in cash, without interest (a "Cash Election"), OR (ii) 0.6977 of a share of SPX
Common Stock (a "Stock Election"), OR (iii) 0.4186 of a share of SPX Common
Stock and $18.00 in cash, without interest (a "Mixed Election" and, together
with a Cash Election and a Stock Election, an "Election"), or (B) hereby states
that the undersigned has no preference as among the Cash Election, Stock
Election or Mixed Election (a "Non-Election"). In addition, it is understood
that the Exchange Agent will pay cash in lieu of any fractional shares of SPX
Common Stock otherwise issuable in connection with the Merger. Any cash
(excluding cash received in lieu of fractional shares) and SPX Common Stock
received by holders of General Signal Common Stock in connection with the Merger
is hereinafter referred to as "Cash Consideration" and "Stock Consideration,"
respectively. The Cash Consideration, Stock Consideration and cash paid in lieu
of fractional shares are collectively referred to as the "Merger Consideration."
    
 
   
     The undersigned understands that each Election is subject to certain terms,
conditions and limitations that have been set forth in the Merger Agreement
including, but not limited to, the fact that 40% of the outstanding shares of
General Signal Common Stock will be converted into the right to receive cash in
the Merger and 60% of the outstanding shares of General Signal Common Stock will
be converted into the right to receive SPX Common Stock in the Merger. THE
UNDERSIGNED ACKNOWLEDGES THAT THE MERGER AGREEMENT PROVIDES FOR PRORATION IF, AS
A RESULT OF THE ELECTIONS MADE, EITHER OF THE FOREGOING LIMITATIONS WOULD
OTHERWISE BE EXCEEDED, WITH THE RESULT THAT THE UNDERSIGNED MAY RECEIVE A
COMBINATION OF CASH AND SPX COMMON STOCK THAT DIFFERS FROM THE ELECTION MADE
HEREBY.
    
 
   
     If the undersigned is acting in a representative or fiduciary capacity for
a particular beneficial owner, the undersigned hereby certifies that this Form
of Election and Letter of Transmittal covers all of the shares of General Signal
Common Stock owned by the undersigned in a representative or fiduciary capacity
for such particular beneficial owner.
    
 
   
     The undersigned hereby represents and warrants that the undersigned is, as
of the date hereof, and will be, as of the Effective Time, the registered holder
of the shares of General Signal Common Stock represented by the General Signal
Stock Certificate(s) surrendered herewith, with good title to such shares of
General Signal Common Stock and full power and authority (i) to sell, assign and
transfer such shares free and clear of all liens, restrictions, charges and
encumbrances, and not subject to any adverse claims and (ii) to make the
Election indicated herein. The undersigned will, upon request, execute any
additional documents necessary or desirable to complete the surrender and
exchange of such shares of General Signal Common Stock. The undersigned hereby
irrevocably appoints the Exchange Agent, as agent of the undersigned, to effect
the exchange pursuant to the Merger Agreement and the instructions hereto. All
authority conferred or agreed to be conferred in this Form of Election and
Letter of Transmittal shall be binding upon the successors, assigns, heirs,
executors, administrators and legal representatives of the undersigned and shall
not be affected by, and shall survive, the death or incapacity of the
undersigned.
    
<PAGE>   4
 
                         SPECIAL ELECTION INSTRUCTIONS
 
   
     The appropriate box must be checked in Box A above in order to make a Cash
Election, Stock Election or Mixed Election. The box indicating a Non-Election
may be checked by those wishing to make a Non-Election, but any Form of Election
and Letter of Transmittal received by the Exchange Agent without any checked
election box or with more than one checked election box will be treated as
indicating a Non-Election.
    
 
     Your choice of Election is as follows:
 
   
<TABLE>
<CAPTION>
                                                    WHAT YOU WILL RECEIVE FOR EACH SHARE
                     ELECTION                          OF GENERAL SIGNAL COMMON STOCK
                     --------                       -------------------------------------
<S>                                                 <C>
Cash Election.....................................  $45.00 in cash, without interest
Stock Election....................................  0.6977 of a share of SPX Common Stock
Mixed Election....................................  0.4186 of a share of SPX Common Stock
                                                    and $18.00 in cash, without interest
</TABLE>
    
 
   
     ALL ELECTIONS ARE SUBJECT TO THE PRORATION PROCEDURES SET FORTH IN SECTION
2.1 OF THE MERGER AGREEMENT, A COPY OF WHICH IS ATTACHED TO THE JOINT PROXY
STATEMENT/PROSPECTUS AS APPENDIX A. THE PRORATION PROCEDURES ARE DESCRIBED UNDER
THE CAPTION "THE MERGER AGREEMENT -- ELECTIONS" IN THE JOINT PROXY
STATEMENT/PROSPECTUS AND IN GENERAL INSTRUCTION 3 BELOW. YOU ARE URGED TO READ
THE JOINT PROXY STATEMENT/ PROSPECTUS IN ITS ENTIRETY BEFORE COMPLETING THIS
FORM OF ELECTION AND LETTER OF TRANSMITTAL.
    
 
   
     ALL HOLDERS OF GENERAL SIGNAL COMMON STOCK WISHING TO MAKE AN ELECTION MUST
DELIVER TO THE EXCHANGE AGENT A PROPERLY COMPLETED FORM OF ELECTION AND LETTER
OF TRANSMITTAL PRIOR TO THE ELECTION DEADLINE (WHICH IS 5:00 P.M. (EASTERN TIME)
ON OCTOBER 2, 1998. ALL HOLDERS SUBMITTING A FORM OF ELECTION AND LETTER OF
TRANSMITTAL THAT IS RECEIVED BY THE EXCHANGE AGENT AFTER THE ELECTION DEADLINE
WILL BE DEEMED TO HAVE MADE A NON-ELECTION REGARDLESS OF THE ELECTION SPECIFIED
ON SUCH FORM.
    
 
   
     The Exchange Agent reserves the right to deem that you have made a
Non-Election if:
    
 
     A. No Election choice is indicated in Box A above;
 
     B. More than one Election choice is indicated in Box A above;
 
   
     C. You fail to follow the instructions on this Form of Election and Letter
of Transmittal (including failure to submit your General Signal Stock
Certificate(s) or a Guarantee of Delivery) or otherwise fail to properly make an
Election;
    
 
   
     D. A completed Form of Election and Letter of Transmittal (including
submission of your General Signal Stock Certificate(s) or a Guarantee of
Delivery) is not actually received by the Exchange Agent prior to the Election
Deadline; or
    
 
   
     E. You return this Form of Election and Letter of Transmittal with a
Guarantee of Delivery but do not deliver the General Signal Stock Certificates
representing the shares in respect of which the Election is being made within
three NYSE trading days thereafter.
    
 
     Notwithstanding anything to the contrary in this Form of Election and
Letter of Transmittal, the Exchange Agent reserves the right to waive any flaws
in a completed Form of Election and Letter of Transmittal but shall be under no
obligation to do so.
 
   
     In order to receive the Merger Consideration, this Form of Election and
Letter of Transmittal must be (i) completed and signed in the space provided
below and on the Substitute Form W-9 and (ii) mailed or delivered with your
General Signal Stock Certificate(s) or a Guarantee of Delivery to the Exchange
Agent at either of the addresses set forth above. In order to properly make an
Election, these actions must be taken in a timely fashion such that the Form of
Election and Letter of Transmittal and other required documents are received by
the Exchange Agent prior to the Election Deadline.
    
 
   
     The effectiveness of Elections received on the Election Deadline and
accompanied by a Guarantee of Delivery will not be finally determined until
three NYSE trading days after the Election Deadline. As a result, the Merger
Consideration to which a holder of General Signal Common Stock is entitled (and
whether any proration is necessary) may be delayed for up to three NYSE trading
days. The Merger Consideration is expected to be mailed promptly following such
determination or, if later, promptly after the Merger is consummated.
    
<PAGE>   5
 
     Unless otherwise indicated below under "Special Issuance and Payment
Instructions," in exchange for the enclosed General Signal Stock Certificates,
the Merger Consideration will be delivered in the name of the undersigned.
Similarly, unless otherwise indicated below under "Special Delivery
Instructions," the Merger Consideration will be mailed to the undersigned at the
address shown in Box A above. In the event that the "Special Issuance and
Payment Instructions" box is completed, the Merger Consideration will be issued
in the name of, and will be mailed to, the person or entity so indicated at the
address so indicated, but only after the Exchange Agent has been provided with
satisfactory evidence of the payment of, or exemption from payment of, any
applicable stock transfer taxes payable on account of the transfer to such
person or entity prior to the delivery of the Merger Consideration. In addition,
appropriate signature guarantees must be included with respect to shares of
General Signal Common Stock for which Special Issuance and Payment Instructions
are given.
 
   
                          SPECIAL ISSUANCE AND PAYMENT
    
   
                                  INSTRUCTIONS
    
   
                      (SEE GENERAL INSTRUCTIONS 6 AND 11)
    
 
   
     To be completed ONLY if the Merger Consideration (whether cash, SPX Common
Stock or a combination thereof) is to be issued in the name of, and mailed to,
someone other than the undersigned.
    
 
   
Issue the Merger Consideration (whether cash, SPX Common Stock or a combination
thereof) to:
    
 
   
Name
    
   
                                    (Please Print)
    
 
   
Address
    
   
                               (Include Zip Code)
    
 
   
If you complete this box, you will need a signature guarantee by an eligible
institution. See General Instruction 6.
    
 
   
                         SPECIAL DELIVERY INSTRUCTIONS
    
   
                          (SEE GENERAL INSTRUCTION 11)
    
 
   
     To be completed ONLY if the Merger Consideration (whether cash, SPX Common
Stock or a combination thereof) is to be mailed to the undersigned at an address
other than that shown in Box A above.
    
 
   
Mail the Merger Consideration (whether cash, SPX Common Stock or a combination
thereof) to:
    
 
   
Name
    
   
                                    (Please Print)
    
 
   
Address
    
   
                               (Include Zip Code)
    
 
Check this box if this is a permanent change of address. [ ]
<PAGE>   6
 
   
                                PLEASE SIGN HERE
    
 
Signature:
- --------------------------------------------------------------------------------
 
Signature:
- --------------------------------------------------------------------------------
 
Dated:
- -------------------------------------------
 
Name(s):
- --------------------------------------------------------------------------------
                                    (Please Print)
 
Capacity:
- --------------------------------------------------------------------------------
 
Daytime Area Code and
Telephone Number:
- --------------------------------------------------------------------------------
 
   
Signature(s) of registered holder(s) must be EXACTLY as name(s) appear(s) in Box
A headed "Election and Description of Shares of General Signal Common Stock" or
on the assignment authorizing transfer.
    
 
   
If signed by a trustee, executor, administrator, guardian, attorney-in-fact,
officer of a corporation or other person acting in a fiduciary or representative
capacity, the capacity of the person signing should be indicated. (See General
Instruction 10 hereto.)
    
 
   
If a participant in the General Signal Dividend Reinvestment Plan (the "DRP"),
the person(s) signing above hereby direct(s) the First Chicago Trust Company of
New York, General Signal's Transfer Agent, to place a stop against the
aforementioned number of shares of General Signal Common Stock held through the
DRP pending the passing of the Election Deadline. Following the Election
Deadline, the Transfer Agent is further directed to follow the directions for
delivery to the Exchange Agent.
    
 
                              SIGNATURE GUARANTEE
              (REQUIRED ONLY IN CASES SPECIFIED IN INSTRUCTION 6)
 
The undersigned hereby guarantees the signature(s) which appear(s) on this Form
of Election and Letter of Transmittal.
 
Dated:
- -------------------------------------------
 
- --------------------------------------------------------------------------------
                (Name of Eligible Institution Issuing Guarantee)
                                 (Please Print)
 
- --------------------------------------------------------------------------------
                          (Fix Medallion Stamp Above)
<PAGE>   7
 
                             GUARANTEE OF DELIVERY
   
            (TO BE USED IF GENERAL SIGNAL STOCK CERTIFICATES ARE NOT
    
                             SURRENDERED HEREWITH)
   
                          (See General Instruction 7)
    
 
   
     THE UNDERSIGNED (CHECK APPROPRIATE BOX BELOW) GUARANTEES TO DELIVER TO THE
EXCHANGE AGENT AT THE APPROPRIATE ADDRESS SET FORTH ABOVE THE CERTIFICATES FOR
SHARES OF GENERAL SIGNAL COMMON STOCK COVERED BY THIS FORM OF ELECTION AND
LETTER OF TRANSMITTAL NO LATER THAN 5:00 P.M. (EASTERN TIME), ON THE THIRD NYSE
TRADING DAY AFTER THE DATE OF EXECUTION OF THIS GUARANTEE OF DELIVERY.
    
 
<TABLE>
<S>                                            <C>
[ ] A member of a registered national          ------------------------------------------------------
    securities exchange                                     Firm (Please Print or Type)
 
[ ] A member of the National Association of    ------------------------------------------------------
    Securities Dealers, Inc.                                    Authorized Signature
 
[ ] A commercial bank or trust company in the  ------------------------------------------------------
    United States                              ------------------------------------------------------
                                                                      Address
Dated:
                                               ------------------------------------------------------
                                                           Area Code and Telephone Number
</TABLE>
<PAGE>   8
 
   
                              GENERAL INSTRUCTIONS
    
 
   
     This Form of Election and Letter of Transmittal is to be completed and
submitted to the Exchange Agent prior to the Election Deadline by those holders
of shares of General Signal Common Stock desiring to make a Cash Election, Stock
Election or Mixed Election. It may also be used as a letter of transmittal for
holders of General Signal Common Stock who do not complete and submit the Form
of Election and Letter of Transmittal prior to the Election Deadline or at any
time by any holders of General Signal Common Stock who wish to make a Non-
Election. Until a record holder's General Signal Stock Certificates are received
by the Exchange Agent at one of the addresses set forth on the cover, together
with such documents as the Exchange Agent may require, and until the same are
processed for exchange by the Exchange Agent, such holders will not receive any
certificates representing shares of the Stock Consideration or the check
representing the Cash Consideration or cash in lieu of fractional shares (if
any) in exchange for their General Signal Stock Certificates. No interest will
accrue on the Cash Consideration or any cash in lieu of fractional shares.
Holders of General Signal Common Stock receiving Stock Consideration will be
entitled to any dividends or other distributions paid on SPX Common Stock after
the Effective Time. If your stock certificate(s) are lost, stolen or destroyed,
please refer to General Instruction 12 below.
    
 
   
     A HOLDER OF GENERAL SIGNAL COMMON STOCK MUST CHECK THE APPROPRIATE ELECTION
BOX IN BOX A ABOVE TO MAKE A CASH ELECTION, STOCK ELECTION OR MIXED ELECTION.
ONLY ONE ELECTION BOX MAY BE CHECKED.
    
 
   
     Your election is subject to certain terms, conditions and limitations which
are set forth in the Merger Agreement and described in the Joint Proxy
Statement/Prospectus. The Merger Agreement is included as Appendix A to the
Joint Proxy Statement/Prospectus. Copies of the Joint Proxy Statement/Prospectus
may be requested from the Information Agent or from the Exchange Agent at the
addresses or toll-free numbers shown on the cover. The delivery of this Form of
Election and Letter of Transmittal to the Exchange Agent is acknowledgment of
the receipt of the Joint Proxy Statement/Prospectus.
    
 
   
     1. Election Deadline. THE ELECTION DEADLINE IS 5:00 P.M. (EASTERN TIME) ON
OCTOBER 2, 1998, THE LAST BUSINESS DAY PRIOR TO THE DATE OF THE SPECIAL MEETING
OF STOCKHOLDERS OF GENERAL SIGNAL CALLED TO APPROVE THE MERGER (THE "GENERAL
SIGNAL SPECIAL MEETING") AND THE SPECIAL MEETING OF STOCKHOLDERS OF SPX CALLED
TO APPROVE THE ISSUANCE OF SHARES OF SPX COMMON STOCK IN THE MERGER (THE "SPX
SPECIAL MEETING"), UNLESS OTHERWISE EXTENDED BY MUTUAL AGREEMENT OF SPX AND
GENERAL SIGNAL. For any Cash Election, Stock Election or Mixed Election
contained herein to be effective, this Form of Election and Letter of
Transmittal, properly completed, and the related General Signal Stock
Certificate(s) (or a Guarantee of Delivery) must be received by the Exchange
Agent at one of the addresses shown above on this Form of Election and Letter of
Transmittal at or prior to the Election Deadline. ANY GENERAL SIGNAL STOCK
CERTIFICATES FOR WHICH A GUARANTEE OF DELIVERY IS PROVIDED MUST IN FACT BE
DELIVERED WITHIN THREE NYSE TRADING DAYS AFTER THE DATE SUCH GUARANTEE OF
DELIVERY IS EXECUTED OR YOU WILL BE DEEMED TO HAVE MADE A NON-ELECTION. The
Exchange Agent will determine whether any Form of Election and Letter of
Transmittal or any General Signal Stock Certificates in respect of a Guarantee
of Delivery are received on a timely basis. Any such determinations made in good
faith will be conclusive and binding.
    
 
   
     2. Revocation or Change of Form of Election and Letter of Transmittal. A
Form of Election and Letter of Transmittal may be (i) revoked if the Exchange
Agent receives written notice prior to the Election Deadline from the record
holder of the shares covered by such Election or (ii) changed if the Exchange
Agent receives a completed replacement Form of Election and Letter of
Transmittal prior to the Election Deadline from the record holder of the shares
covered by such Election. Any person who has effectively revoked a Form of
Election and Letter of Transmittal may, by signed and written notice to the
Exchange Agent, request the return of the General Signal Stock Certificates
submitted to the Exchange Agent and such General Signal Stock Certificates will
be returned without charge to such person promptly after receipt of such
request.
    
 
   
     3. Election Procedures/Proration. To properly complete Box A, (i) the
undersigned must check either the Cash Election, Stock Election, Mixed Election
or Non-Election box (if no box is checked, the Non-Election box will be deemed
to have been checked); (ii) the name and address of the registered holder(s)
must be set forth in the column under the heading "Name and Address of
Registered Holder(s)" and (iii) either (a) the number of each General Signal
Stock Certificate surrendered herewith must be written in the column under the
heading "Certificate Number" or (b) if the Guarantee of Delivery procedures are
used, the number of shares represented by the General Signal Stock Certificates
to be delivered pursuant to such procedures must be written in the column under
the heading "Number of Shares Represented by each Certificate," but no
certificate number is required. As
    
<PAGE>   9
 
   
set forth in the Joint Proxy Statement/Prospectus, 40% of the outstanding shares
of General Signal Common Stock will be exchanged for cash and 60% of the
outstanding shares of General Signal Common Stock will be exchanged for SPX
Common Stock. If the Elections result in an oversubscription of either the Cash
Consideration or the Stock Consideration, the procedures for allocating the
Merger Consideration set forth in Section 2.1 of the Merger Agreement and
described in the Joint Proxy Statement/Prospectus will be followed by the
Exchange Agent. Accordingly, there can be no assurance that a Cash Election,
Stock Election or Mixed Election made by you will result in your receipt of the
desired type and amount of Merger Consideration. See the Joint Proxy Statement/
Prospectus under the caption "The Merger Agreement -- Elections." The
effectiveness of Elections that are accompanied by Guarantees of Delivery may
not be finally determined until three NYSE trading days after the Election
Deadline. As a result, it is expected that the final determination of the Merger
Consideration to which a holder of General Signal Common Stock is entitled (and
whether any proration is necessary) will take place on or around October 8,
1998. The Merger Consideration is expected to be mailed promptly following such
determination, or, if later, promptly after the Merger is consummated.
    
 
   
     4. Termination of Merger Agreement. Consummation of the Merger is subject
to the required approval of the stockholders of General Signal and SPX and to
the satisfaction of certain other conditions. No payments related to any
surrender of General Signal Stock Certificates will be made prior to the
consummation of the Merger and no payments will be made if the Merger Agreement
is terminated. If the Merger Agreement is terminated, all Elections will be void
and of no effect and the Exchange Agent will promptly return all General Signal
Stock Certificates previously received by it. In such event, shares of General
Signal Common Stock held through The Depository Trust Company are expected to be
available for sale or transfer promptly following such termination. Certificates
representing shares of General Signal Common Stock held of record directly by
the beneficial owners of such shares of General Signal Common Stock will be
returned by the Exchange Agent without charge to the holder as promptly as
practicable by first class, insured mail.
    
 
   
     5. No Fractional Interests. No certificate representing a fraction of a
share of SPX Common Stock will be issued. In lieu thereof, the Exchange Agent
will remit on SPX's behalf cash, without interest, in an amount equal to the
product of (i) the per share closing price on the NYSE of SPX Common Stock on
the trading day immediately prior to the Effective Time and (ii) the fractional
interest to which a holder of General Signal Common Stock would otherwise be
entitled (after taking into account all shares of General Signal Common Stock
then held of record by such holder). No such holder of General Signal Common
Stock shall be entitled to dividends, voting rights or any other rights in
respect of any fractional share.
    
 
   
     6. Guarantee of Signatures. If the Merger Consideration is to be issued in
the name of the registered holder(s) as inscribed on the surrendered General
Signal Certificate(s), the signatures on this Form of Election and Letter of
Transmittal need not be guaranteed. If the "Special Issuance and Payment
Instructions" box has been completed so that payment is to be made to someone
other than the registered holder(s) of General Signal Common Stock with respect
to the surrendered General Signal Stock Certificate(s), signatures on this Form
of Election and Letter of Transmittal must be guaranteed by a financial
institution (including most commercial banks, savings and loan associations and
brokerage houses) that is a participant in the Security Transfer Agent's
Medallion Program, the New York Stock Exchange Medallion Program or the Stock
Exchange Medallion Program. Public notaries cannot execute acceptable guarantees
of signatures.
    
 
   
     7. Delivery of Form of Election and Letter of Transmittal and General
Signal Stock Certificates; Guarantee of Delivery. This Form of Election and
Letter of Transmittal, properly completed and duly executed, together with your
General Signal Stock Certificate(s) or a Guarantee of Delivery, should be
delivered to the Exchange Agent at one of the addresses set forth above. A
Guarantee of Delivery of such General Signal Stock Certificates must be made by
a firm which is a member of a registered national securities exchange or of the
National Association of Securities Dealers, Inc. or a commercial bank or trust
company having an office or correspondent in the United States, AND ANY GENERAL
SIGNAL STOCK CERTIFICATES COVERED BY A GUARANTEE OF DELIVERY MUST IN FACT BE
DELIVERED TO THE EXCHANGE AGENT WITHIN THREE NYSE TRADING DAYS AFTER THE DATE OF
EXECUTION OF SUCH GUARANTEE OF DELIVERY. Failure to deliver such General Signal
Stock Certificates within such three day period shall invalidate any Election,
and a Non-Election shall be deemed to have been made. THE METHOD OF DELIVERY OF
THE FORM OF ELECTION AND LETTER OF TRANSMITTAL, THE GENERAL SIGNAL STOCK
CERTIFICATES AND ALL OTHER REQUIRED DOCUMENTS IS AT THE ELECTION AND RISK OF THE
HOLDER OF SHARES OF GENERAL SIGNAL COMMON STOCK. IF YOU CHOOSE TO SEND THE
MATERIALS BY MAIL, IT IS RECOMMENDED THAT THEY BE SENT BY REGISTERED MAIL,
APPROPRIATELY INSURED, WITH RETURN RECEIPT REQUESTED. Delivery of
    
<PAGE>   10
 
   
the materials will be deemed effective, and risk of loss with respect thereto
will pass, only when such materials are actually received by the Exchange Agent.
    
 
     8. Shares Held by Nominees, Trustees or other Representatives. Holders of
record of shares of General Signal Common Stock who hold such shares as
nominees, trustees or in other representative or fiduciary capacities (a
"Representative") may submit one or more Forms of Election and Letter of
Transmittal covering the aggregate number of shares of General Signal Common
Stock held by such Representative for the beneficial owners for whom the
Representative is making an Election or a Non-Election, provided that such
Representative certifies that each Form of Election and Letter of Transmittal
covers all of the shares of General Signal Common Stock held by such
Representative for any single beneficial owner. Any Representative that makes an
Election or a Non-Election may be required to provide the Exchange Agent with
such documents and/or additional certifications, if requested, in order to
satisfy the Exchange Agent that such Representative holds such shares of General
Signal Common Stock for a particular beneficial owner. If any shares of General
Signal Common Stock are not covered by an effective Form of Election and Letter
of Transmittal, they will be deemed to be covered by a Non-Election.
 
     9. Inadequate Space. If the space provided herein is inadequate, the share
certificate numbers and the numbers of shares of General Signal Common Stock
represented thereby should be listed on additional sheets and attached hereto.
 
     10. Signatures on Form of Election and Letter of Transmittal, Share Powers
and Endorsements.
 
   
          (a) All signatures must correspond exactly with the name written on
     the face of the General Signal Stock Certificate(s) without alteration,
     variation or any change whatsoever.
    
 
   
          (b) If the General Signal Stock Certificates surrendered are held of
     record by two or more joint owners, all such owners must sign this Form of
     Election and Letter of Transmittal.
    
 
   
          (c) If any surrendered shares of General Signal Common Stock are
     registered in different names on several General Signal Stock
     Certificate(s), it will be necessary to complete, sign and submit as many
     separate Forms of Election and Letter of Transmittal as there are different
     registrations of General Signal Stock Certificates.
    
 
   
          (d) If this Form of Election and Letter of Transmittal is signed by a
     person(s) other than the record holder(s) of the General Signal Stock
     Certificate(s) listed (other than as set forth in paragraph (e) below),
     such certificates must be endorsed or accompanied by appropriate share
     powers, in either case signed exactly as the name(s) of the record
     holder(s) appears on such certificate(s).
    
 
   
          (e) If this Form of Election and Letter of Transmittal is signed by a
     trustee, executor, administrator, guardian, attorney-in-fact, officer of a
     corporation or other person acting in a fiduciary or representative
     capacity and such person is not the record holder of the accompanying
     General Signal Stock Certificates, he or she must indicate the capacity
     when signing and must submit proper evidence of his or her authority to
     act.
    
 
   
     11. Special Issuance and Delivery Instructions. In the "Special Issuance
and Payment Instructions" box, indicate the name and/or address of the person(s)
to whom the Merger Consideration is to be issued and mailed only if the Merger
Consideration (whether cash, SPX Common Stock or a combination thereof) is to be
issued in the name of someone other than the person(s) signing this Form of
Election and Letter of Transmittal. If the "Special Issuance and Payment
Instructions" box is completed, the Exchange Agent will issue the Merger
Consideration in the name of, and will mail the Merger Consideration to, the
person or entity so indicated at the address so indicated, but only after the
Exchange Agent has been provided with satisfactory evidence of the payment of,
or exemption from payment of, any applicable stock transfer taxes payable on
account of the transfer to such person or entity prior to the delivery of the
Merger Consideration.
    
 
   
     In the "Special Delivery Instructions" box, indicate the address to which
the Merger Consideration is to be mailed in the name of the undersigned only if
different from the address set forth in Box A.
    
 
   
     12. Lost, Stolen or Destroyed Certificates. You cannot submit an effective
Form of Election and Letter of Transmittal without enclosing your General Signal
Stock Certificates with this Form of Election and Letter of Transmittal or
providing a Guarantee of Delivery followed within three NYSE trading days
thereafter by the General Signal Stock Certificates. If your General Signal
Stock Certificate(s) have been lost, stolen or destroyed, you are urged to call
First Chicago Trust Company of New York, General Signal's transfer agent (the
"Transfer Agent"), at (800) 756-8200. The Transfer Agent will forward additional
documentation which you must complete
    
<PAGE>   11
 
   
in order to obtain a replacement stock certificate. You may be required to post
an indemnity bond if so required by SPX.
    
 
   
     13. Dividend Reinvestment Plan Participants. If you are a participant in
the General Signal Dividend Reinvestment Plan (the "DRP"), you must so indicate
by checking the box in Box B headed "Dividend Reinvestment Plan Participants"
above. Participants in the DRP do not need to send their General Signal Stock
Certificates held through the DRP or a Guarantee of Delivery with this Form of
Election and Letter of Transmittal. By sending in this Form of Election and
Letter of Transmittal and indicating you are a participant in the DRP, you
authorize the Transfer Agent (i) to place a stop against the aforementioned
number of shares of General Signal Common Stock held in the DRP pending the
passing of the Election Deadline and (ii) to follow the directions for delivery
to the Exchange Agent following the Election Deadline.
    
 
     14. Miscellaneous. SPX and the Exchange Agent have the discretion to
determine whether a Form of Election and Letter of Transmittal has been properly
completed, signed and submitted or revoked and to disregard immaterial defects
in any Form of Election and Letter of Transmittal. The good faith decision of
SPX or the Exchange Agent in such matters shall be conclusive and binding. SPX
and the Exchange Agent are not under any duty to give notification of defects in
any Form of Election and Letter of Transmittal.
 
   
     15. Information and Additional Copies. Information and additional copies of
this Form of Election and Letter of Transmittal may be obtained from the
Information Agent by telephoning toll-free (800) 549-6746 or from the Exchange
Agent by telephoning toll-free (800) 507-9357.
    
 
                           IMPORTANT TAX INFORMATION
 
     Under federal income tax law, the Exchange Agent is required to file a
report with the Internal Revenue Service ("IRS") disclosing any payments made to
a holder of General Signal Common Stock pursuant to the Merger Agreement and to
impose 31% backup withholding if required. If the correct certifications on
Substitute Form W-9 are not provided, a $50 penalty may be imposed on the holder
by the IRS and payments made for shares of General Signal Common Stock may be
subject to backup withholding of 31%. Backup withholding is also required if the
IRS notifies the recipient that the recipient is subject to backup withholding
as a result of a failure to report all interest and dividends.
 
     In order to avoid backup withholding resulting from a failure to provide a
correct certification, a holder of General Signal Common Stock must, unless an
exemption applies, provide the Exchange Agent with his correct taxpayer
identification number ("TIN") on Substitute Form W-9 as set forth on this Form
of Election and Letter of Transmittal. Such person must certify under penalties
of perjury that such number is correct and that such holder is not otherwise
subject to backup withholding. The TIN that must be provided is that of the
registered holder of the General Signal Common Stock. If the General Signal
Common Stock is held in more than one name or is not registered in the name of
the actual holder or if the Merger Consideration is to be delivered to another
person as provided in the box entitled "Special Issuance and Payment
Instructions", consult the enclosed guidelines for Certification of Taxpayer
Identification Number on Substitute Form W-9 and your tax advisor for additional
guidance on which number to report. The box in Part 3 of the Substitute Form W-9
should be checked if the surrendering holder of General Signal Common Stock has
not been issued a TIN and has applied for a TIN or intends to apply for a TIN in
the near future. If the box in Part 3 is checked and the Exchange Agent is not
provided with a TIN, SPX will withhold 31% of all such payments and dividends. A
foreign person may qualify as an exempt recipient by submitting to the Exchange
Agent a properly completed IRS Form W-8, signed under penalties of perjury,
attesting to that person's exempt status. Foreign investors should consult their
tax advisors regarding the need to complete IRS Form W-8 and any other forms
that may be required.
 
     Backup withholding is not an additional federal income tax. Rather, the
federal income tax liability of a person subject to backup withholding will be
reduced by the amount of tax withheld. If backup withholding results in an
overpayment of taxes, a refund may be obtained from the IRS.
 
     Please read the enclosed Guidelines for Certification of Taxpayer
Identification Number on Substitute Form W-9 for additional important
information on how to complete the Substitute Form W-9.
 
     For a summary of the federal income tax consequences of the receipt of the
Merger Consideration, see "Certain Federal Income Tax Consequences of the
Merger" in the Joint Proxy Statement/Prospectus.
<PAGE>   12
 
   
<TABLE>
<S>                                <C>                                  <C>
- ---------------------------------------------------------------------------------------------------------------------------
                                            PAYER'S NAME: THE BANK OF NEW YORK
 --------------------------------------------------------------------------------------------------------------------------
 
 SUBSTITUTE                         PART 1--PLEASE PROVIDE YOUR
 FORM W-9                           TAXPAYER IDENTIFICATION NUMBER IN             -------------------------------
                                    THE BOX AT RIGHT AND CERTIFY BY                Social Security Number(s) or
 PLEASE FILL IN YOUR                SIGNING AND DATING BELOW.                         Employer Identification
 NAME AND ADDRESS BELOW                                                                      Number(s)
                                   ----------------------------------------------------------------------------------------
    
   
- -------------------------            PART 2--Exempt Payees  [ ]
 Name (if joint ownership, list
 first                             ----------------------------------------------------------------------------------------
    
   
and circle the name of the           PART 3--Awaiting TIN  [ ]
 person or entity whose number
                                   ----------------------------------------------------------------------------------------
 
                                    CERTIFICATION--UNDER PENALTY OF PERJURY, I CERTIFY THAT:
 is entered in Part 1)              (1) The number shown on this form is my correct Taxpayer Identification Number (or I am
                                    waiting for a number to be issued to me), and
 --------------------------
 Address (number and street)        (2) I am not subject to backup withholding because: (a) I am exempt from backup
                                    withholding, or (b) I have not been notified by the Internal Revenue Service ("IRS")
- --------------------------              that I am subject to backup withholding as a result of a failure to report all
 City, State and Zip Code               interest or dividends, or (c) the IRS has notified me that I am no longer subject
                                        to backup withholding.
 DEPARTMENT OF THE TREASURY
 INTERNAL REVENUE SERVICE           CERTIFICATION INSTRUCTIONS--You must cross out item (2) above if you have been notified
 PAYER'S REQUEST FOR TAXPAYER       by the IRS that you are subject to backup withholding because of under-reported
 IDENTIFICATION NUMBER (TIN)        interest or dividends on your tax return. However, if after being notified by the IRS
                                    that you were subject to backup withholding you received another notification from the
                                    IRS stating that you are no longer subject to backup withholding, do not cross out item
                                    (2). If you are exempt from backup withholding, check the box in Part 2 above.

- ---------------------------------------------------------------------------------------------------------------------------
 
 SIGNATURE: _________________________________________________________ DATE:_____________________________________________
 
- ---------------------------------------------------------------------------------------------------------------------------

</TABLE>
    
 
NOTE: FAILURE TO COMPLETE AND RETURN THIS FORM OF ELECTION AND LETTER OF
      TRANSMITTAL, INCLUDING THE SUBSTITUTE FORM W-9, MAY RESULT IN BACKUP
      WITHHOLDING OF 31% OF ANY PAYMENTS MADE TO YOU PURSUANT TO THE MERGER
      AGREEMENT. PLEASE REVIEW THE ENCLOSED "GUIDELINES FOR CERTIFICATION OF
      TAXPAYER IDENTIFICATION NUMBER ON SUBSTITUTE FORM W-9" FOR ADDITIONAL
      DETAILS.
 
           YOU MUST COMPLETE THE FOLLOWING CERTIFICATE IF YOU CHECKED
                 THE BOX IN PART 3 OF THE SUBSTITUTE FORM W-9.
 
             CERTIFICATE OF AWAITING TAXPAYER IDENTIFICATION NUMBER
 
     I certify under penalties of perjury that a taxpayer identification number
has not been issued to me, and either (a) I have mailed or delivered an
application to receive a taxpayer identification number to the appropriate
Internal Revenue Service Center or Social Security Administration Office or (b)
I intend to mail or deliver an application in the near future. I understand that
if I do not provide a taxpayer identification number, 31% of all reportable
payments made to me thereafter will be withheld until I provide such number.
 
<TABLE>
<S>                                                            <C>
- -----------------------------------------------------------    ------------------------------------
                         Signature                                             Date
</TABLE>
<PAGE>   13
 
            GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
                         NUMBER ON SUBSTITUTE FORM W-9
 
GUIDELINES FOR DETERMINING THE PROPER IDENTIFICATION NUMBER TO GIVE THE
PAYER -- Social Security numbers have nine digits separated by two hyphens:
i.e., 000-00-0000. Employer identification numbers have nine digits separated by
only one hyphen: i.e., 00-0000000. The table below will help determine the
number to give the payer.
 
<TABLE>
<CAPTION>
- ---------------------------------------------------------------
                                              GIVE THE
                                          SOCIAL SECURITY
     FOR THIS TYPE OF ACCOUNT:               NUMBER OF:
- ---------------------------------------------------------------
                                      GIVE THE EMPLOYER
                                      IDENTIFICATION
           FOR THIS TYPE OF ACCOUNT:  NUMBER OF:
- ---------------------------------------------------------------
<S>  <C>                              <C>
 1.  Individual                       The individual

 2.  Two or more individuals (joint   The actual owner of the
     account)                         account or, if combined
                                      funds, the first
                                      individual on the
                                      account(1)

 3.  Custodian account of a minor     The minor(2)
     (Uniform Gift to Minors Act)

 4.  a. The usual revocable savings   The grantor-trustee(1)
        trust account (grantor is
        also trustee)                 The actual owner(1)
     b. So-called trust account that
        is not a legal or valid
        trust under State law

 5.  Sole proprietorship              The owner(3)

 6.  Sole proprietorship              The owner(3)

 7.  A valid trust, estate, or        The legal entity(4)
     pension trust

 8.  Corporate                        The corporation

 9.  Association, club, religious,    The organization
     charitable, educational, or
     other tax-exempt organization

10.  Partnership                      The partnership

11.  A broker or registered nominee   The broker or nominee

12.  Account with the Department of   The public entity
     Agriculture in the name of a
     public entity (such as a State
     or local government, school
     district, or prison) that
     receives agricultural program
     payments
- ---------------------------------------------------------------

</TABLE>
 
 
(1) List first and circle the name of the person whose number you furnish. If
     only one person on a joint account has a social security number, that
     person's number must be furnished.
(2) Circle the minor's name and furnish the minor's social security number.
(3) You must show your individual name, but you may also enter your business or
     "doing business as" name. You may use either your social security number or
     your employer identification number (if you have one).
(4) List first and circle the name of the legal trust, estate, or pension trust.
    (Do not furnish the taxpayer identification number of the personal
    representative or trustee unless the legal entity itself is not designated
    in the account title.)
 
NOTE:If no name is circled when more than one name is listed, the number will be
     considered to be that of the first name listed.
 
OBTAINING A NUMBER
 
     If you don't have a taxpayer identification number, obtain Form SS-5,
Application for a Social Security Card, or Form SS-4, Application for Employer
Identification Number, at the local office of the Social Security Administration
or the Internal Revenue Service and apply for a number.
<PAGE>   14
 
PAYEES EXEMPT FROM BACKUP WITHHOLDING
 
Payees specifically exempted from backup withholding with respect to interest
and dividend payments and broker transactions include the following:
 
 - A corporation.
 
 - A financial institution.
 
 - An organization exempt from tax under section 501(a), an individual
  retirement plan or a custodial account under section 403(b)(7) if the account
  satisfies the requirements of section 401(f)(2).
 
 - The United States, a State, the District of Columbia, or a possession of the
   United States, or a political subdivision, agency or instrumentality thereof.
 
 - A foreign government or any political subdivision, agency or instrumentality
   thereof.
 
 - An international organization or any agency or instrumentality thereof.
 
 - A dealer in securities or commodities required to register in the U.S. or a
   possession of the U.S.
 
 - A real estate investment trust.
 
 - A common trust fund operated by a bank under section 584(a).
 
 - An entity registered at all times during the tax year under the Investment
   Company Act of 1940.
 
 - A foreign central bank of issue.
 
Payments of dividends and patronage dividends not generally subject to backup
withholding include the following:
 
 - Payments to nonresident aliens subject to withholding under section 1441.
 
 - Payments to partnerships not engaged in a trade or business in the U.S. and
   that have at least one nonresident alien partner.
 
 - Payments of patronage dividends where the amount received is not paid in
   money.
 
 - Payments made by certain foreign organizations.
 
 - Section 404(k) payments made by an ESOP.
 
Payments of interest not generally subject to backup withholding include the
following:
 
 - Payments of interest on obligations issued by individuals. Note: You may be
   subject to backup withholding if this interest is $600 or more and is paid in
   the course of the payer's trade or business and you have not provided your
   correct taxpayer identification number to the payer.
 
 - Payments of tax-exempt interest (including exempt-interest dividends under
   section 852).
 
 - Payments described in section 6049(b)(5) to non-resident aliens.
 
 - Payments on tax-free covenant bonds under section 1451.
 
 - Payments made by certain foreign organizations.
 
 - Mortgage interest paid to you.
 
Exempt payees described above should file Form W-9 or a substitute Form W-9 to
avoid possible erroneous backup withholding. FILE THIS FORM WITH THE PAYER,
FURNISH YOUR TAXPAYER IDENTIFICATION NUMBER, CHECK THE BOX IN PART 2 OF THE
FORM, RETURN IT TO THE PAYER, AND SIGN AND DATE THE FORM.
 
Payments that are not subject to information reporting are also not subject to
backup withholding. For details, see sections 6041, 6041A, 6042, 6044, 6045,
6049, 6050A and 6050N and the regulations thereunder.
 
PRIVACY ACT NOTICE. -- Section 6109 requires most recipients of dividend,
interest, or other payments to give taxpayer identification numbers to payers,
who must report the payments to the IRS. The IRS uses the numbers for
identification purposes and to help verify the accuracy of your tax return. The
IRS may also provide this information to the Department of Justice for civil and
criminal litigation and to cities, states, and the District of Columbia, to
carry out their tax laws. Payers must be given the numbers whether or not
recipients are required to file tax returns. Payers must generally withhold 31%
of taxable interest, dividend, and certain other payments to a payee who does
not furnish a taxpayer identification number to a payer. Certain penalties may
also apply.
 
PENALTIES
 
(1) PENALTY FOR FAILURE TO FURNISH TAXPAYER IDENTIFICATION NUMBER. -- If you
fail to furnish your taxpayer identification number to a payer, you are subject
to a penalty of $50 for each such failure unless your failure is due to
reasonable cause and not to willful neglect.
 
(2) CIVIL PENALTY FOR FALSE INFORMATION WITH RESPECT TO WITHHOLDING. -- If you
make a false statement with no reasonable basis that results in no imposition of
backup withholding, you are subject to a penalty of $500.
 
(3) CRIMINAL PENALTY FOR FALSIFYING INFORMATION. -- Willfully falsifying
certifications or affirmations may subject you to criminal penalties including
fines and/or imprisonment.
 
                  FOR ADDITIONAL INFORMATION CONTACT YOUR TAX
                   CONSULTANT OR THE INTERNAL REVENUE SERVICE

<PAGE>   1
 
   
                                                                 EXHIBIT 99(vii)
    
 
                                    CONSENT
 
     Reference is made to the Registration Statement on Form S-4, and to the
Joint Proxy Statement/ Prospectus which forms a part thereof (together, the
"Registration Statement"), to be filed with the Securities and Exchange
Commission by SPX Corporation in connection with its combination with General
Signal Corporation. In accordance with Rule 438 under the Securities Act of
1933, as amended, the undersigned hereby consents to being named in the
Registration Statement, and any subsequent amendments thereto, as a person who
is about to become a director of SPX Corporation.
 
   
                                                   /s/ H. KENT BOWEN
    
                                          --------------------------------------
   
                                                      H. Kent Bowen
    
 
   
August 10, 1998
    


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