JOSLYN CORP /IL/
SC 14D1, 1995-07-24
ELECTRICAL INDUSTRIAL APPARATUS
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<PAGE>
 
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- -------------------------------------------------------------------------------
 
                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549
 
                               ----------------
 
                                SCHEDULE 14D-1
                            TENDER OFFER STATEMENT
      PURSUANT TO SECTION 14(D)(1) OF THE SECURITIES EXCHANGE ACT OF 1934
                                      AND
                                AMENDMENT NO. 2
                                      TO
            SCHEDULE 13-D UNDER THE SECURITIES EXCHANGE ACT OF 1934
 
                               ----------------
 
                              JOSLYN CORPORATION
                           (NAME OF SUBJECT COMPANY)
 
                          TK ACQUISITION CORPORATION
                              DANAHER CORPORATION
                                   (BIDDER)
 
  COMMON STOCK, PAR VALUE $1.25 PER SHARE                  48107010
    (INCLUDING THE ASSOCIATED RIGHTS)              (CUSIP NUMBER OF CLASS OF
      (TITLE OF CLASS OF SECURITIES)                      SECURITIES)
 
                             PATRICK W. ALLENDER 
                          TK ACQUISITION CORPORATION 
                           C/O DANAHER CORPORATION 
                      1250 24TH STREET, N.W., SUITE 800 
                            WASHINGTON D.C. 20037 
                           TELEPHONE: (202) 828-0850
           (NAME, ADDRESS AND TELEPHONE NUMBER OF PERSON AUTHORIZED 
          TO RECEIVE NOTICES AND COMMUNICATIONS ON BEHALF OF BIDDER)
 
                                   COPY TO:
                           MEREDITH M. BROWN, ESQ. 
                             DEBEVOISE & PLIMPTON 
                  875 THIRD AVENUE NEW YORK, NEW YORK 10022 
                           TELEPHONE: (212) 909-6000
 
                               ----------------
 
                           CALCULATION OF FILING FEE
        TRANSACTION VALUATION*                 AMOUNT OF FILING FEE**
             $220,558,656                            $44,111.73
- --------
* Based on the offer to purchase all of the outstanding shares of Common
  Stock, par value $1.25 per share (the "Shares"), of the Subject Company and
  the associated Rights at $32 cash per share. Outstanding Shares are assumed
  to equal the sum of the number of Shares outstanding as reported as of March
  31, 1995 in the Subject Company's Quarterly Report on Form 10-Q for the
  quarter ended March 31, 1995 and the number of options outstanding as of
  December 31, 1994 as reported in the Subject Company's Annual Report on Form
  10-K for the fiscal year ended December 31, 1994, less 613,550 Shares
  beneficially owned by Danaher Corporation.
** 1/50 of 1% of Transaction Valuation.
 [ ] Check box if any part of the fee is offset as provided by Rule 0-11(a)(2)
 and identify the filing with which the offsetting fee was previously paid.
 Identify the previous filing by registration statement number, or the Form or
 Schedule and the date of its filing.
 Amount Previously Paid: ______________________
 Form or Registration No.: ____________________
 Filing Party: ____________________
 Date Filed: ______________________
 
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<PAGE>
 
CUSIP NO. 48107010
 
    1.   Name of Reporting Person:
         S.S. OR I.R.S. Identification No. of Above Person
         Danaher Corporation
         I.R.S. Identification No. 59-1995548
- --------------------------------------------------------------------------
    2.   Check the Appropriate Box if a Member of Group
         (See Instructions)
         (a) [_]
         (b) [_]
- --------------------------------------------------------------------------
    3.   SEC Use Only
- --------------------------------------------------------------------------
    4.   Sources of Funds (See Instructions)
         BK
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    5.   Check Box if Disclosure of Legal Proceedings is Required Pursuant
         to Items 2(e) or 2(f) [_]
- --------------------------------------------------------------------------
    6.   Citizenship or Place of Organization
         Delaware
- --------------------------------------------------------------------------
    7.   Aggregate Amount Beneficially Owned by
         Each Reporting Person
         613,550 Shares
- --------------------------------------------------------------------------
    8.   Check if the Aggregate Amount if Row (7) excludes
         Certain Shares (See Instructions) [_]
- --------------------------------------------------------------------------
    9.   Percent of Class Represented by Amount
         in Row (7)
         8.6%
- --------------------------------------------------------------------------
    10.  Type of Reporting Person (See Instructions)
         CO
 
 
                                       1
<PAGE>
 
CUSIP NO. 48107010
 
    1.   Name of Reporting Person:
         S.S. OR I.R.S. Identification No. of Above Person
         TK Acquisition Corporation
         I.R.S. Identification No. 52-1935254
- --------------------------------------------------------------------------
    2.   Check the Appropriate Box if a Member of Group
         (See Instructions)
         (a) [_]
         (b) [_]
- --------------------------------------------------------------------------
    3.   SEC Use Only
- --------------------------------------------------------------------------
    4.   Sources of Funds (See Instructions)
         AF
- --------------------------------------------------------------------------
    5.   Check Box if Disclosure of Legal Proceedings is Required Pursuant
         to Items 2(e) or 2(f) [_]
- --------------------------------------------------------------------------
    6.   Citizenship or Place of Organization
         Delaware
- --------------------------------------------------------------------------
    7.   Aggregate Amount Beneficially Owned by
         Each Reporting Person
         None
- --------------------------------------------------------------------------
    8.   Check if the Aggregate Amount if Row (7) excludes
         Certain Shares (See Instructions) [_]
- --------------------------------------------------------------------------
    9.   Percent of Class Represented by Amount
         in Row (7)
         0%
- --------------------------------------------------------------------------
    10.  Type of Reporting Person (See Instructions)
         CO
 
                                       2
<PAGE>
 
  This Tender Offer Statement on Schedule 14D-1 relates to the offer by TK
Acquisition Corporation, a Delaware corporation (the "Purchaser") and an
indirect wholly owned subsidiary of Danaher Corporation, a Delaware corporation
("Parent"), to purchase all of the outstanding shares of Common Stock, $1.25
par value per share (the "Shares"), of Joslyn Corporation, an Illinois
corporation (the "Company"), and (unless and until the Purchaser declares that
the Rights Condition as defined in the Offer to Purchase referred to below is
satisfied) the associated Rights (the "Rights") issued pursuant to the Rights
Agreement, dated as of February 10, 1988 and amended as of September 2, 1994,
between the Company and The First National Bank of Chicago, an Illinois banking
corporation, as Rights Agent (the "Rights Agreement"), at a purchase price of
$32 per Share (and associated Right), net to the seller in cash, without
interest thereon, upon the terms and subject to the conditions set forth in the
Offer to Purchase, dated July 24, 1995 (the "Offer to Purchase"), and in the
related Letter of Transmittal (which, together with the Offer to Purchase and
supplements thereto, collectively constitute the "Offer"), copies of which are
attached as Exhibits (a)(1) and (a)(2), respectively.
 
ITEM 1. SECURITY AND SUBJECT COMPANY
 
  (a) The name of the subject company is Joslyn Corporation. The principal
executive offices of the Company are located at 30 South Wacker Drive, Chicago,
Illinois 60606.
 
  (b) The exact title of the class of equity securities being sought in the
Offer is Common Stock, $1.25 par value per share, including the associated
Rights, of the Company. Information regarding the number of Shares outstanding,
the amount of Shares being sought and the consideration being offered therefor
is set forth in the Introduction (the "Introduction") of the Offer to Purchase
and is incorporated herein by reference.
 
  (c) Information concerning the principal market in which the Shares are
traded and the high and low sales prices of the Shares for each quarterly
period during the past two years is set forth in Section 6 ("Price Range of the
Shares and Rights; Dividends") of the Offer to Purchase and is incorporated
herein by reference.
 
ITEM 2. IDENTITY AND BACKGROUND
 
  (a)-(d) and (g) This Statement is filed by the Purchaser and Parent. The
information concerning the name, the state of its organization, its principal
business and address of the principal office of each of the Purchaser and
Parent, and the information regarding the name, business address, present
principal occupation or employment and the name, principal business and address
of any corporation or other organization in which such employment or occupation
is conducted, material occupations, positions, offices or employments during
the last five years and the citizenship of each of the executive officers and
directors of the Purchaser and Parent is set forth in Section 9 ("Certain
Information Concerning the Purchaser and Parent") of the Offer to Purchase and
in Schedule I thereto and is incorporated herein by reference.
 
  (e) and (f) During the last five years, neither the Purchaser nor Parent nor,
to the best knowledge of the Purchaser or Parent, any of the persons listed in
Schedule I to the Offer to Purchase (i) has been convicted in a criminal
proceeding (excluding traffic violations or similar misdemeanors) or (ii) was a
party to a civil proceeding of a judicial or administrative body of competent
jurisdiction and as a result of such proceeding was or is subject to a
judgment, decree or final order enjoining future violations of, or prohibiting
activities subject to, federal or state securities laws or finding any
violation of such laws.
 
ITEM 3. PAST CONTACTS, TRANSACTIONS OR NEGOTIATIONS WITH THE SUBJECT COMPANY
 
  (a) The information set forth in Section 9 ("Certain Information Concerning
the Purchaser and Parent") of the Offer to Purchase is incorporated herein by
reference. Except as set forth in Section 9 of the Offer to Purchase, since
January 1, 1992, there have been no transactions which would be required to be
disclosed under this Item 3(a) between either the Purchaser or Parent or, to
the best knowledge of the Purchaser and Parent, any of the persons listed in
Schedule I to the Offer to Purchase and the Company or any of its executive
officers, directors or affiliates.
 
                                       3
<PAGE>
 
  (b) The information set forth in Section 9 ("Certain Information Concerning
the Purchaser and Parent") and Section 10 ("Background of the Offer; Contacts
with the Company") of the Offer to Purchase is incorporated herein by
reference. Except as set forth in Section 9 and Section 10 of the Offer to
Purchase, since January 1, 1992, there have been no contacts, negotiations or
transactions which would be required to be disclosed under this Item 3(b)
between either the Purchaser or Parent or any of their respective subsidiaries
or, to the best knowledge of the Purchaser and Parent, any of those persons
listed in Schedule I to the Offer to Purchase and the Company or its affiliates
concerning a merger, consolidation or acquisition, a tender offer or other
acquisition of securities, an election of directors or a sale or other transfer
of a material amount of assets.
 
ITEM 4. SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION
 
  (a)-(b) The information set forth in Section 12 ("Source and Amount of
Funds") of the Offer to Purchase is incorporated herein by reference.
 
  (c) Not applicable.
 
ITEM 5. PURPOSE OF THE TENDER OFFER AND PLANS OR PROPOSALS OF THE BIDDER
 
  (a)-(g) The information set forth in the Introduction, Section 7 ("Possible
Effects of the Offer on the Market for the Shares and Rights; Stock Exchange
Listing, Exchange Act Registration; Margin Regulations"), Section 10
("Background of the Offer; Contacts with the Company"), Section 11 ("Purpose of
the Offer; Plans for the Company") and Section 13 ("Dividends and
Distributions") of the Offer to Purchase is incorporated herein by reference.
 
ITEM 6. INTEREST IN SECURITIES OF THE SUBJECT COMPANY
 
  (a) The information set forth in the Introduction and Section 9 ("Certain
Information Concerning the Purchaser and Parent") of, and Schedule I to, the
Offer to Purchase is incorporated herein by reference.
 
  (b) The information set forth in the Introduction, Section 9 ("Certain
Information Concerning the Purchaser and Parent") and Section 10 ("Background
of the Offer; Contacts with the Company") of, and Schedule I to, the Offer to
Purchase is incorporated herein by reference.
 
ITEM 7. CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH RESPECT
TO THE SUBJECT COMPANY'S SECURITIES
 
  The information set forth in the Introduction, Section 9 ("Certain
Information Concerning the Purchaser and Parent"), Section 10 ("Background of
the Offer; Contacts with the Company"), Section 11 ("Purpose of the Offer;
Plans for the Company"), Section 12 ("Source and Amount of Funds") and Section
16 ("Certain Fees and Expenses") of the Offer to Purchase is incorporated
herein by reference. Except as set forth in the Introduction and Sections 9,
10, 11, 12 and 16 of the Offer to Purchase, neither the Purchaser nor Parent,
nor, to the best knowledge of the Purchaser or Parent, any of the persons
listed in Schedule I to the Offer to Purchase, has any contract, arrangement,
understanding or relationship with any other person with respect to any
securities of the Company (including, but not limited to, any contract,
arrangement, understanding or relationship concerning the transfer or the
voting of any such securities, joint ventures, loans or option arrangements,
puts or calls, guarantees of loans, guarantee agreements or any giving or
withholding of proxies).
 
ITEM 8. PERSONS RETAINED, EMPLOYED OR TO BE COMPENSATED
 
  The information set forth in the Introduction and Section 16 ("Certain Fees
and Expenses") of the Offer to Purchase is incorporated herein by reference.
 
 
                                       4
<PAGE>
 
ITEM 9. FINANCIAL STATEMENTS OF CERTAIN BIDDERS
 
  The information set forth in Section 9 ("Certain Information Concerning the
Purchaser and Parent") of the Offer to Purchase, including the financial
statements and related notes thereto incorporated by reference in Section 9, is
incorporated herein by reference.
 
  The incorporation by reference herein of the above-referenced financial
information does not constitute an admission that such information is material
to a decision by a shareholder of the Company whether to sell, tender or hold
Shares being sought in the Offer.
 
ITEM 10. ADDITIONAL INFORMATION
 
  (a) The information set forth in the Introduction, in Section 9 ("Certain
Information Concerning the Purchaser and Parent"), in Section 10 ("Background
of the Offer; Contracts with the Company") and in Section 12 ("Purpose of the
Offer; Plans for the Company") of the Offer to Purchase is incorporated herein
by reference.
 
  (b) and (c) The information set forth in the Introduction, Section 11
("Purpose of the Offer; Plans for the Company") and Section 15 ("Certain Legal
Matters; Required Regulatory Approvals") of the Offer to Purchase is
incorporated herein by reference.
 
  (d) The information set forth in Section 7 ("Possible Effects of the Offer on
the Market for the Shares and Rights; Stock Exchange Listing, Exchange Act
Registration; Margin Regulations") and Section 15 ("Certain Legal Matters;
Required Regulatory Approvals") of the Offer to Purchase is incorporated herein
by reference.
 
  (e) The information set forth in Section 10 ("Background of the Offer;
Contacts with the Company") and Section 15 ("Certain Legal Matters; Required
Regulatory Approvals") of the Offer to Purchase is incorporated herein by
reference.
 
  (f) The information set forth in the Offer to Purchase and the Letter of
Transmittal is incorporated herein by reference.
 
ITEM 11. MATERIAL TO BE FILED AS EXHIBITS
 
<TABLE>
<S>        <C>
(a)(1)     Offer to Purchase dated July 24, 1995.
(a)(2)     Letter of Transmittal.
(a)(3)     Notice of Guaranteed Delivery.
(a)(4)     Letter from the Dealer Manager to Brokers, Dealers, Commercial Banks, Trust
           Companies and Nominees.
(a)(5)     Letter to Clients for use by Brokers, Dealers, Commercial Banks, Trust Companies
           and Nominees.
(a)(6)     Guidelines for Certification of Taxpayer Identification Number on Substitute Form
           W-9.
(a)(7)     Summary Advertisement as published on July 24, 1995.
(a)(8)     Press Release issued by Parent on July 24, 1995.
(b)(1)(a)  Credit Agreement, dated as of September 7, 1990, as amended, by and among Parent
           and the Financial Institutions listed therein (incorporated by reference to
           Exhibit 11(b)(1) of Parent's Schedule 14D-1 dated March 22, 1994).
(b)(1)(b)  Letter, dated July 20, 1995, from Bank of America to Parent.
(c)        None.
(d)        None.
(e)        Not applicable.
(f)        None.
(g)(1)     Complaint seeking Declaratory and Injunctive Relief filed in the United States
           District Court for the Northern District of Illinois on July 24, 1995.
</TABLE>
 
                                       5
<PAGE>
 
                                   SIGNATURE
 
  After due inquiry and to the best of my knowledge and belief, I certify that
the information set forth in this Statement is true, complete and correct.
 
                                          Danaher Corporation
 
                                             /s/ Patrick W. Allender
                                          By: _________________________________
                                             Name: Patrick W. Allender
                                             Title:Senior Vice President,
                                                    Chief Financial Officer
                                                    and Secretary
 
                                          TK Acquisition Corporation
 
                                             /s/ Patrick W. Allender
                                          By: _________________________________
                                             Name: Patrick W. Allender
                                             Title: Vice President and
                                             Treasurer
 
Date: July 24, 1995
 
                                       6
<PAGE>
 
                                 EXHIBIT INDEX
 
<TABLE>
<CAPTION>
                                                                                       PAGE
 EXHIBIT NO.                                DESCRIPTION                                NO.
 -----------                                -----------                                ----
 <C>         <S>                                                                       <C>
 11(a)(1)    Offer to Purchase dated July 24, 1995...................................

 11(a)(2)    Letter of Transmittal...................................................
 11(a)(3)    Notice of Guaranteed Delivery...........................................
 11(a)(4)    Letter from the Dealer Manager to Brokers, Dealers, Commercial Banks,
             Trust Companies and Nominees............................................
 11(a)(5)    Letter to Clients for use by Brokers, Dealers, Commercial Banks, Trust
             Companies and Nominees..................................................
 11(a)(6)    Guidelines for Certification of Taxpayer Identification Number on
             Substitute
             Form W-9................................................................
 11(a)(7)    Summary Advertisement as published on July 24, 1995.....................
 11(a)(8)    Press Release issued by Parent on July 24, 1995.........................
 11(b)(1)(a) Credit Agreement, dated as of September 7, 1990, as amended, by and
             among Parent and the Financial Institutions listed therein. (This
             Exhibit can be found as Exhibit 11(b)(1) to Parent's Schedule 14D-1
             dated March 22, 1994 and is incorporated herein by reference.) .........
 11(b)(1)(b) Letter, dated July 20, 1995, from Bank of America to Parent.............
 11(g)(1)    Complaint seeking Declaratory and Injunctive Relief filed in the United
             States District Court for the Northern District of Illinois on July 24,
             1995....................................................................
</TABLE>
 

<PAGE>

                                                                EXHIBIT 11(a)(1)
 
 OFFER TO PURCHASE FOR CASH ALL OUTSTANDING SHARES OF COMMON STOCK (INCLUDING
                 THE ASSOCIATED COMMON STOCK PURCHASE RIGHTS)
 
                                      OF
 
                              JOSLYN CORPORATION
 
                                      AT
 
                               $32 NET PER SHARE
 
                                      BY
 
                          TK ACQUISITION CORPORATION
 
                    AN INDIRECT WHOLLY OWNED SUBSIDIARY OF
 
                              DANAHER CORPORATION
 
 THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK CITY
        TIME, ON FRIDAY, AUGUST 18, 1995, UNLESS THE OFFER IS EXTENDED.
 
 
  THE OFFER IS CONDITIONED UPON, AMONG OTHER THINGS: (1) THERE BEING VALIDLY
TENDERED AND NOT PROPERLY WITHDRAWN PRIOR TO THE EXPIRATION OF THE OFFER THAT
NUMBER OF SHARES WHICH, WHEN AGGREGATED WITH THE SHARES CURRENTLY OWNED BY
DANAHER CORPORATION ("PARENT"), REPRESENT AT LEAST TWO-THIRDS OF THE TOTAL
NUMBER OF OUTSTANDING SHARES OF COMMON STOCK, PAR VALUE $1.25 PER SHARE (THE
"SHARES"), OF JOSLYN CORPORATION (THE "COMPANY") DETERMINED ON A FULLY DILUTED
BASIS ON THE DATE OF PURCHASE (THE "MINIMUM CONDITION"), (2) THE COMPANY'S
COMMON STOCK PURCHASE RIGHTS (THE "RIGHTS") HAVING BEEN REDEEMED BY THE
COMPANY'S BOARD OF DIRECTORS OR TK ACQUISITION CORPORATION (THE "PURCHASER")
BEING SATISFIED, IN ITS SOLE DISCRETION, THAT SUCH RIGHTS HAVE BEEN
INVALIDATED OR ARE OTHERWISE INAPPLICABLE TO THE OFFER AND THE PROPOSED MERGER
(AS DEFINED IN THE INTRODUCTION) (THE "RIGHTS CONDITION") AND (3) THE
PURCHASER BEING SATISFIED, IN ITS SOLE DISCRETION, THAT AFTER CONSUMMATION OF
THE OFFER, THE RESTRICTIONS ON BUSINESS COMBINATIONS AS DEFINED AND CONTAINED
IN SECTIONS 7.85 AND 11.75 OF THE ILLINOIS BUSINESS CORPORATION ACT (THE
"ILLINOIS LAW") WILL NOT APPLY TO THE PROPOSED MERGER (THE "BUSINESS
COMBINATION CONDITION"). THE OFFER IS ALSO SUBJECT TO OTHER TERMS AND
CONDITIONS CONTAINED IN THIS OFFER TO PURCHASE. SEE "INTRODUCTION" AND
SECTIONS 1, 14 AND 15.
 
                                ---------------
 
                                   IMPORTANT
 
  Any shareholder desiring to tender all or any portion of his or her Shares,
and the associated Rights, should either (i) complete and sign the Letter of
Transmittal (or a facsimile thereof) in accordance with the instructions in
the Letter of Transmittal and mail or deliver it together with the
certificate(s) representing tendered Shares ("Share Certificates") and, if
separate, the certificate(s) representing the associated Rights ("Rights
Certificates"), and any other required documents, to the Depositary (as
defined herein) or tender such Shares (and associated Rights, if applicable)
pursuant to the procedures for book-entry transfer set forth in Section 3 or
(ii) request his or her broker, dealer, commercial bank, trust company or
other nominee to effect the transaction for the shareholder. A shareholder
whose Shares and, if applicable, associated Rights are registered in the name
of a broker, dealer, commercial bank, trust company or other nominee must
contact such broker, dealer, commercial bank, trust company or other nominee
if the shareholder desires to tender such Shares and, if applicable, the
associated Rights.
 
  Unless and until the Purchaser declares that the Rights Condition is
satisfied, shareholders will be required to tender one associated Right for
each Share tendered in order to effect a valid tender of such Share. Until the
Distribution Date (as defined in Section 11) occurs, the Rights will be
represented by and transferred with the Shares. Accordingly, if the
Distribution Date does not occur prior to the Expiration Date (as defined in
Section 1), a tender of Shares will constitute a tender of the associated
Rights. If the Distribution Date occurs prior to the Expiration Date, the
procedures set forth in Section 3 with respect to separate delivery of Rights
Certificates must be followed.
 
  A shareholder who desires to tender his or her Shares and associated Rights,
and whose certificates representing such Shares (and, if applicable,
associated Rights) are not immediately available or who cannot comply with the
procedures for book-entry transfer on a timely basis, may tender such Shares
(and, if applicable, associated Rights) by following the procedures for
guaranteed delivery set forth in Section 3.
 
  Questions and requests for assistance may be directed to Merrill Lynch,
Pierce, Fenner & Smith Incorporated (the "Dealer Manager") or to D.F. King &
Co., Inc. (the "Information Agent") at their respective addresses and
telephone numbers set forth on the back cover of this Offer to Purchase.
Additional copies of this Offer to Purchase, the Letter of Transmittal, the
Notice of Guaranteed Delivery and other related materials may be obtained from
the Information Agent or from brokers, dealers, commercial banks and trust
companies.
 
                     The Dealer Manager for the Offer is:
 
                              MERRILL LYNCH & CO.
 
July 24, 1995
<PAGE>
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                                                    PAGE
                                                                                    ----
<S>   <C>                                                                           <C>
INTRODUCTION.......................................................................   1
THE TENDER OFFER...................................................................   6
   1. Terms of the Offer..........................................................    6
   2. Acceptance for Payment and Payment for Shares...............................    7
   3. Procedures for Tendering Shares and Rights..................................    9
   4. Withdrawal Rights...........................................................   13
   5. Certain Federal Income Tax Consequences.....................................   14
   6. Price Range of the Shares and Rights; Dividends.............................   14
   7. Possible Effects of the Offer on the Market for the Shares and Rights; Stock
       Exchange Listing, Exchange Act Registration; Margin Regulations............   15
   8. Certain Information Concerning the Company..................................   17
   9. Certain Information Concerning the Purchaser and Parent.....................   19
  10. Background of the Offer; Contacts with the Company..........................   22
  11. Purpose of the Offer; Plans for the Company.................................   27
  12. Source and Amount of Funds..................................................   34
  13. Dividends and Distributions.................................................   35
  14. Certain Conditions of the Offer.............................................   36
  15. Certain Legal Matters; Required Regulatory Approvals........................   40
  16. Certain Fees and Expenses...................................................   43
  17. Miscellaneous...............................................................   43
SCHEDULE I Directors and Executive Officers of Parent and the Purchaser............ S-1
</TABLE>
<PAGE>
 
To: All Holders of Shares of Common Stock of
    Joslyn Corporation
 
                                  INTRODUCTION
 
  TK Acquisition Corporation, a Delaware corporation (the "Purchaser") and an
indirect wholly owned subsidiary of Danaher Corporation, a Delaware corporation
("Parent"), hereby offers to purchase all outstanding shares of common stock,
par value $1.25 per share (the "Shares"), of Joslyn Corporation, an Illinois
corporation (the "Company"), and (unless and until the Purchaser declares that
the Rights Condition (as defined herein) has been satisfied) the associated
Common Stock Purchase Rights (the "Rights") issued pursuant to the Rights
Agreement, dated as of February 10, 1988 and amended as of September 2, 1994,
between the Company and The First National Bank of Chicago, an Illinois banking
corporation, as Rights Agent (as the same may be further amended, the "Rights
Agreement"), at a purchase price of $32 per Share (and associated Right), net
to the seller in cash without interest thereon, upon the terms and subject to
the conditions set forth in this Offer to Purchase and in the related Letter of
Transmittal (which together constitute the "Offer"). Unless the context
otherwise requires, all references in this Offer to Purchase to "Shares" shall
include the associated Rights and all references to "Rights" shall include all
benefits that may inure to the shareholders of the Company or to holders of the
Rights pursuant to the Rights Agreement.
 
  Tendering shareholders will not be obligated to pay brokerage fees or
commissions or, except as set forth in Instruction 6 of the Letter of
Transmittal, stock transfer taxes on the purchase of Shares and Rights pursuant
to the Offer. However, any tendering shareholder or other payee who fails to
complete and sign the Substitute Form W-9 that is included in the Letter of
Transmittal may be subject to a required backup federal income tax withholding
of 31% of the gross proceeds payable to such shareholder or other payee
pursuant to the Offer. See Section 3. The Purchaser will pay all fees and
expenses of Merrill Lynch, Pierce, Fenner & Smith Incorporated ("Merrill
Lynch"), which is acting as Dealer Manager for the Offer (in such capacity, the
"Dealer Manager"), Bank of America Illinois as Depositary (the "Depositary"),
and D.F. King & Co., Inc. as Information Agent (the "Information Agent"),
incurred in connection with the Offer. See Section 16.
 
  The purpose of the Offer is to acquire control of, and the entire equity
interest in, the Company. The Purchaser currently intends to propose and seek
to have the Company consummate, as soon as practicable following completion of
the Offer, a merger or similar business combination with the Purchaser (the
"Proposed Merger"), pursuant to which each then outstanding Share (other than
Shares owned by Parent or any of its wholly owned subsidiaries, Shares held in
the treasury of the Company and Shares held by shareholders who perfect
appraisal rights under the Illinois Business Corporation Act (the "Illinois
Law")) would be converted into the right to receive cash in the same amount as
received per Share in the Offer, and the Company would become an indirect
wholly owned subsidiary of Parent.
 
  Although the Purchaser will seek to have the Company consummate the Proposed
Merger as soon as practicable after consummation of the Offer, if the Board of
Directors of the Company opposes the Offer and the Proposed Merger, certain
terms of the Rights and certain provisions of the Illinois Law, the Company's
Certificate of Incorporation, as amended (the "Company's Certificate"), and the
Company's Bylaws, as amended and restated on September 16, 1994 (the "Company's
Bylaws"), may affect the ability of the Purchaser to consummate the Offer, to
obtain control of the Company and to effect the Proposed Merger. Accordingly,
the timing of consummation of the Offer and the Proposed Merger will depend on
a variety of factors and legal requirements, the actions of the Board of
Directors of the Company, the number of Shares (if any) acquired by the
Purchaser pursuant to the Offer, and whether the Minimum Condition, the Rights
Condition and the Business Combination Condition (as such terms are defined
herein) are satisfied or waived.
 
  In order to increase the likelihood that the Company and the Purchaser enter
into the Proposed Merger, Parent and the Purchaser intend to commence a
solicitation of appointments of Parent and the Purchaser as designated agents
for the purpose of calling a special meeting of the Company's shareholders (the
"Special
<PAGE>
 
Meeting") at which, among other things, Parent and the Purchaser would propose
that the holders of Shares (i) remove all of the incumbent directors of the
Company, (ii) amend the Company's By-Laws to fix the number of directors of the
Company at three and (iii) elect the nominees of the Purchaser to serve as the
directors of the Company. The nominees of the Purchaser, if elected at the
Special Meeting, intend (a) subject to invalidation of the provision of the
Rights Agreement providing that the Rights may be redeemed only by action of
the Continuing Directors (see Section 11), to redeem the Rights (or amend the
Rights Agreement to make the Rights inapplicable to the Offer and the Proposed
Merger) and approve the Offer and the Proposed Merger under Sections 7.85 and
11.75 of the Illinois Law or take such other action as may be necessary to
satisfy the Rights Condition and the Business Combination Condition (each as
hereinafter defined), and take such other actions as may be required to
expedite prompt consummation of the Offer and the Proposed Merger, or (b) if
any other transaction offering more value to the Company's shareholders is
proposed, to take such actions as may be required to facilitate such a
transaction, subject to fulfillment of the fiduciary duties that they would
have as directors of the Company.
 
  THIS OFFER TO PURCHASE DOES NOT CONSTITUTE A SOLICITATION OF A PROXY, CONSENT
OR AUTHORIZATION FOR OR WITH RESPECT TO ANY MEETING OF THE COMPANY'S
SHAREHOLDERS OR ANY ACTION IN LIEU THEREOF. ANY SUCH SOLICITATION WHICH PARENT
OR THE PURCHASER MAY MAKE WILL BE MADE ONLY PURSUANT TO SEPARATE PROXY
SOLICITATION MATERIALS COMPLYING WITH ALL APPLICABLE REQUIREMENTS OF SECTION
14(A) OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED (THE "EXCHANGE ACT"),
AND THE RULES AND REGULATIONS PROMULGATED THEREUNDER.
 
  The Offer is conditioned upon the fulfillment of certain conditions described
herein. The Offer will expire at 12:00 midnight, New York City time, on Friday,
August 18, 1995, unless extended.
 
 Certain Conditions to the Offer
 
  The Offer is subject to the fulfillment of certain conditions, including,
without limitation, the following:
 
  MINIMUM CONDITION. CONSUMMATION OF THE OFFER IS CONDITIONED (THE "MINIMUM
CONDITION") UPON THERE BEING VALIDLY TENDERED AND NOT PROPERLY WITHDRAWN ON OR
PRIOR TO THE EXPIRATION DATE (AS DEFINED IN SECTION 1) THAT NUMBER OF SHARES
WHICH, WHEN AGGREGATED WITH THE SHARES CURRENTLY OWNED BY PARENT, REPRESENT AT
LEAST TWO-THIRDS OF THE TOTAL NUMBER OF OUTSTANDING SHARES ON A FULLY DILUTED
BASIS ON THE DATE OF PURCHASE. FOR PURPOSES OF THIS OFFER "ON A FULLY DILUTED
BASIS" MEANS, AS OF ANY DATE, THE NUMBER OF SHARES OUTSTANDING, TOGETHER WITH
SHARES THAT THE COMPANY IS OR MAY BECOME REQUIRED TO ISSUE PURSUANT TO
OBLIGATIONS OUTSTANDING AT THAT DATE UNDER CONVERTIBLE SECURITIES, EMPLOYEE AND
DIRECTOR STOCK OPTIONS, OR OTHERWISE.
 
  According to the Company's Quarterly Report on Form 10-Q for the quarter
ended March 31, 1995 (the "Company's First Quarter 10-Q") filed with the
Securities Exchange Commission (the "Commission") pursuant to the Exchange Act,
as of May 11, 1995, there were 7,162,000 Shares outstanding. According to the
Company's Annual Report on Form 10-K for the fiscal year ended December 31,
1994 (the "Company's 1994 10-K"), filed with the Commission pursuant to the
Exchange Act, there were options to purchase 344,008 Shares outstanding at
December 31, 1994 and 1,737,242 Shares remaining available for grant under the
Company's Employee Stock Benefit Plan (the "Company's Employee Stock Plan") and
the Company's Stock Option Plan (the "Company's Stock Plan"). Information is
not currently publicly available with respect to the number of Shares subject
to options pursuant to the Company's recently-adopted Non-Employee Director
Stock Plan (the "Company's Outside Director Stock Plan"). Accordingly, based on
publicly available information, there are 7,506,008 Shares outstanding on a
fully diluted basis (of which Parent, through its wholly owned subsidiary DH
Holdings Corp., owns 613,550 Shares), assuming (1) that no Shares were issued
or acquired by the Company after March 31, 1995, (2) no options are outstanding
with respect to the Company's Outside Director Stock Plan, (3) no exercise of
the options outstanding as of December 31, 1994 prior to the Expiration Date
and (4) that as of the Expiration Date there are no other obligations to issue
Shares. Based on the foregoing, the Minimum Condition would be satisfied if at
least 4,161,117 Shares are validly tendered pursuant to the Offer and not
properly withdrawn.
 
 
                                       2
<PAGE>
 
  The Purchaser will make a determination as to whether the Minimum Condition
has been satisfied based on the best information available to it at the time of
such determination.
 
  RIGHTS CONDITION. CONSUMMATION OF THE OFFER IS CONDITIONED UPON THE RIGHTS
HAVING BEEN REDEEMED BY THE COMPANY'S BOARD OF DIRECTORS OR THE PURCHASER BEING
SATISFIED, IN ITS SOLE DISCRETION, THAT SUCH RIGHTS HAVE BEEN INVALIDATED OR
ARE OTHERWISE INAPPLICABLE TO THE OFFER AND THE PROPOSED MERGER (THE "RIGHTS
CONDITION"). THE RIGHTS ARE DESCRIBED IN THE COMPANY'S FORM 8-A/A, DATED
SEPTEMBER 9, 1994 (THE "COMPANY'S 8-A/A"), AND SUCH DESCRIPTION IS SUMMARIZED
HEREIN AND IN SECTION 11.
 
  According to the Company's 8-A/A, a person who beneficially owns 15% or more
of the outstanding Shares is deemed to be an "Acquiring Person" for purposes of
the Rights Agreement, provided that such term excludes certain persons who
inadvertently come to own beneficially 15% or more of the outstanding Shares
and who promptly divest a sufficient number of Shares so that such persons
would no longer be Acquiring Persons. As of the date hereof, Parent, through
its wholly owned subsidiary DH Holdings Corp., owned an aggregate of 613,550
Shares. If Parent or the Purchaser acquires any additional Shares, which
together with the 613,550 Shares already owned by Parent represent 15% or more
of the outstanding Shares, unless prior to such time the Rights are redeemed or
invalidated or otherwise inapplicable to the Offer, each holder of record of a
Right (other than Parent and the Purchaser, according to the terms of the
Rights Agreement) will have the right to receive, upon exercise of the Right,
Shares having a purchase price at the time of the transaction equal to the
greater of (i) 20% of the then current market price per Share and (ii) the par
value per Share. In the event that, once a person has become an Acquiring
Person, (i) the Company is acquired in a share exchange or in a merger or
consolidation in which the Company is not the surviving corporation or in which
all or part of the outstanding Shares is changed into or exchanged for
securities of any other person, cash or any other property or (ii) more than
50% of the Company's consolidated assets or earning power is sold or
transferred to any person (other than the Company, any subsidiary of the
Company or any employee benefit plan of the Company or of any subsidiary of the
Company), each holder of a Right (other than Parent and the Purchaser,
according to the terms of the Rights Agreement) shall thereafter have the right
to receive, upon exercise of the Right, such number of shares of common stock
of the acquiring company as shall have a value equal to two times the exercise
price of the Right. As a result, the Rights could make Parent's acquisition of
the Company prohibitively expensive by severely diluting Parent's equity
interest and voting power.
 
  According to the Company's 8-A/A, at any time until the earlier of (i)
fifteen days after the date of public announcement that a person has become an
Acquiring Person or (ii) the date of expiration of the Rights pursuant to the
Rights Agreement, the Board of Directors of the Company may redeem the Rights
in whole, but not in part, at a price of $0.03333 per Right. Immediately upon
the action of the Board of Directors of the Company authorizing redemption of
the Rights, the right to exercise the Rights will terminate and the only right
of the holders of Rights will be to receive $0.03333 per Right. Under certain
circumstances set forth in the Rights Agreement, the decision to redeem is
stated to require the concurrence of a majority of the Continuing Directors,
defined to mean any member of the Board of Directors of the Company who was a
member of the Board prior to the date of the Rights Agreement, and any person
who is subsequently elected to the Board if such person is recommended or
approved by a majority of the Continuing Directors, but not to include an
Acquiring Person, any affiliate or associate of an Acquiring Person, or any
representative of the foregoing entities.
 
  According to the Company's 8-A/A, until the Distribution Date (as defined in
Section 11), the Rights will not be exercisable and will be represented by and
transferred with, and only with, the associated Shares and the surrender for
transfer of any of the certificates representing Shares (the "Share
Certificates") will also constitute the transfer of the Rights associated with
the Shares represented by such Share Certificates. According to the Company's
8-A/A, the Rights Agreement provides that the Rights will become exercisable
after the Distribution Date and, as soon as practicable following the
Distribution Date, separate certificates representing the Rights ("Rights
Certificates") will be mailed to holders of record of Shares as of the
Distribution Date, and thereafter the Rights Certificates alone will evidence
the Rights. Based on publicly available information, the Purchaser believes
that currently the Rights are not exercisable, Rights Certificates
 
                                       3
<PAGE>
 
have not been issued and the Rights are evidenced by the Share Certificates.
Under the Rights Agreement, as a result of the announcement of the Offer, the
Purchaser believes that the Distribution Date will be as early as August 7,
1995, unless prior to such date the Company's Board of Directors redeems or
otherwise makes inapplicable to the Offer the Rights or takes action to delay
the Distribution Date.
 
  The Purchaser is hereby requesting that the Company's Board of Directors
redeem the Rights or take such other action as is necessary to make the Rights
inapplicable to the Offer. The Purchaser believes that under the circumstances
of the Offer, and under applicable law, the Board of Directors of the Company
has a fiduciary obligation to redeem the Rights (or to amend the Rights
Agreement to make the Rights inapplicable to the Offer and the Proposed
Merger). However, there can be no assurance that the Board of Directors of the
Company will redeem the Rights (or so amend the Rights Agreement). The
Purchaser has commenced litigation against the Company and its directors in the
United States District Court for the Northern District of Illinois (the
"Court") seeking, among other things, a preliminary injunction enjoining the
operation of the provisions of the Rights Agreement purporting to require the
approval by the Continuing Directors for redeeming the Rights or taking certain
actions with respect to the Rights and the Rights Agreement and an order
compelling the Board of Directors of the Company to redeem the Rights or to
make the Rights inapplicable to the Offer and the Proposed Merger. See Section
10 for a further discussion of this litigation.
 
  The Purchaser expects to seek to remove the members of the current Board of
Directors of the Company and to replace them with the Purchaser's nominees, who
intend to redeem the Rights (or amend the Rights Agreement to make the Rights
inapplicable to the Offer and the Proposed Merger) subject to the fulfillment
of the fiduciary duties that they would have as directors of the Company.
Redemption of the Rights (or such an amendment to the Rights Agreement) by the
current Board of Directors, or, if the provisions of the Rights Agreement
relating to the requirement for approval by the Continuing Directors have been
declared invalid, by the nominees of the Purchaser, would satisfy the Rights
Condition.
 
  BUSINESS COMBINATION CONDITION. CONSUMMATION OF THE OFFER IS CONDITIONED UPON
THE PURCHASER BEING SATISFIED, IN ITS SOLE DISCRETION, THAT AFTER CONSUMMATION
OF THE OFFER, THE RESTRICTIONS CONTAINED IN SECTIONS 7.85 AND 11.75 OF THE
ILLINOIS LAW (TOGETHER, THE "BUSINESS COMBINATION LAW") WILL NOT APPLY TO THE
PROPOSED MERGER OR OTHER BUSINESS COMBINATION (AS DEFINED THEREIN) TO WHICH
PURCHASER IS DIRECTLY OR INDIRECTLY A PARTY (THE "BUSINESS COMBINATION
CONDITION").
 
  The Proposed Merger, including, without limitation, the timing and details
thereof, is subject to, among other things, the provisions of the Illinois Law,
including, without limitation, the Business Combination Law. The two relevant
Sections of the Business Combination Law are summarized below. See Section 10
for a more detailed description of the terms of the Business Combination Law.
 
SECTION 7.85
 
  Section 7.85 of the Illinois Law provides that an Illinois corporation, such
as the Company, may not engage in any "Business Combination" (defined to
include a variety of transactions, including, without limitation, a merger)
with any "Interested Shareholder" (defined for purposes of Section 7.85 as a
person that directly or indirectly beneficially owns 10% or more of the
corporation's outstanding voting stock), or any affiliate of an Interested
Shareholder, at any time unless (i) two-thirds of the Disinterested Directors
(as such term is defined in Section 10) of such corporation approved the
Business Combination, (ii) the Business Combination is approved by the holders
of at least (a) 80% of the outstanding voting stock of the corporation and (b)
a majority of the combined voting power of the corporation's voting stock which
is not owned by the Interested Shareholder or its affiliates or associates, or
(iii) the Business Combination meets certain "fair price" and "fair process"
requirements, which (a) set minimum levels for consideration to be received by
shareholders, (b) disallow certain preferential arrangements between the
corporation and the Interested Shareholder and (c) require that a proxy or
information statement describing the business combination be mailed to
shareholders at least 30 days prior to the consummation of the business
combination. See Section 10.
 
                                       4
<PAGE>
 
SECTION 11.75
 
  Section 11.75 of the Illinois Law provides that an Illinois corporation, such
as the Company, may not engage in any Business Combination with any "Interested
Shareholder" (defined for purposes of Section 11.75 as a person that directly
or indirectly, by itself or with or through any of the affiliates or
associates, beneficially owns 15% or more of the corporation's outstanding
voting stock) for three years after the date on which the Interested
Shareholder becomes an Interested Shareholder, unless (i) prior to the date
such Interested Shareholder became an Interested Shareholder, the board of
directors of such corporation approved either the Business Combination or the
transaction which resulted in the shareholder becoming an Interested
Shareholder, (ii) upon consummation of the transaction which resulted in the
shareholder becoming an Interested Shareholder, the Interested Shareholder
owned at least 85% of the voting stock of the corporation outstanding at the
time the transaction commenced or (iii) on or subsequent to the date the
shareholder becomes an Interested Shareholder, the Business Combination is (a)
approved by the board of directors of the corporation and (b) authorized at an
annual or special meeting of shareholders by the affirmative vote of the
holders of at least two-thirds of the outstanding voting stock of the
Corporation which is not owned by the Interested Shareholder.
 
  The Business Combination Condition would be satisfied if (i) both of the
following conditions (a) and (b) are satisfied, or (ii) if the Purchaser, in
its sole discretion, were satisfied that the Business Combination Law was
invalid or its restrictions were otherwise inapplicable to the Purchaser in
connection with the Proposed Merger for any reason, including, without
limitation, those specified in the Business Combination Law:
 
    (a) the Board of Directors of the Company approved the Offer and the
  Proposed Merger prior to consummation of the Offer, or if, upon
  consummation of the Offer, the Purchaser owned at least 85% of the total
  voting stock of the Company outstanding at the time the transaction
  commenced, and
 
    (b) two-thirds of the Company's Disinterested Directors approved the
  Proposed Merger, or the holders of 80% of the Shares and a majority of the
  disinterested shareholders of the Company approved the Proposed Merger, or
  the Proposed Merger were found to meet the "fair price" and "fair process"
  requirements outlined above and described in detail in Section 10.
 
  The Purchaser is hereby requesting that the Board of Directors approve the
Offer and Proposed Merger for purposes of the Business Combination Law. There
can be no assurance that the Board of Directors will do so. If the Board does
not so approve the Offer and Proposed Merger but both conditions (a) and (b)
above are otherwise satisfied, then the restrictions on business combinations
contained in the Business Combination Law would not be applicable.
 
  The Purchaser has commenced litigation against the Company and all of its
directors in the Court seeking, among other things, an order compelling the
Board of Directors of the Company to approve the Offer and the Proposed Merger
for purposes of the Business Combination Law, on the grounds that failure to do
so would constitute a breach of fiduciary duty to the Company's shareholders.
See Section 10 for a further discussion of this litigation.
 
  At the Special Meeting, the Purchaser expects to seek to remove the members
of the current Board of Directors of the Company and to replace them with the
Purchaser's nominees, who intend to approve the Offer and the Proposed Merger
under the Business Combination Law, subject to the fulfillment of the fiduciary
duties that they would have as Directors of the Company. Approval of the Offer
and the Proposed Merger under the Business Combination Law would satisfy the
Business Combination Condition.
 
  Certain other conditions to the consummation of the Offer are described in
Section 14. The Purchaser expressly reserves the right to waive any one or more
of the conditions to the Offer. See Sections 14 and 15.
 
  THIS OFFER TO PURCHASE AND THE LETTER OF TRANSMITTAL CONTAIN IMPORTANT
INFORMATION WHICH SHOULD BE READ CAREFULLY BEFORE ANY DECISION IS MADE WITH
RESPECT TO THE OFFER.
 
                                       5
<PAGE>
 
                                THE TENDER OFFER
 
1. TERMS OF THE OFFER
 
  Upon the terms and subject to the conditions of the Offer (including, if the
Offer is extended or amended, the terms and conditions of any such extension or
amendment), the Purchaser will accept for payment and thereby purchase all
Shares validly tendered and not properly withdrawn in accordance with the
procedures set forth in Section 4 on or prior to the Expiration Date (as
defined herein). The term "Expiration Date" means 12:00 midnight, New York City
time, on Friday, August 18, 1995, unless and until the Purchaser, in its sole
discretion, shall have extended the period of time for which the Offer is open,
in which event the term "Expiration Date" shall mean the time and date at which
the Offer, as so extended by the Purchaser, shall expire.
 
  THE OFFER IS CONDITIONED UPON, AMONG OTHER THINGS, SATISFACTION OF EACH OF
THE CONDITIONS SET FORTH ABOVE IN THE INTRODUCTION AND IN SECTION 14. THE
PURCHASER RESERVES THE RIGHT (BUT SHALL NOT BE OBLIGATED) TO WAIVE ANY OR ALL
OF SUCH CONDITIONS.
 
  If by the Expiration Date, any or all of such conditions have not been
satisfied or waived, the Purchaser expressly reserves the right (but shall not
be obligated) (i) to decline to purchase any of the Shares tendered and
terminate the Offer, (ii) to waive all of the unsatisfied conditions and,
subject to complying with applicable rules and regulations of the Commission,
to purchase all Shares validly tendered or (iii) to extend the Offer and,
subject to the right of shareholders to withdraw Shares until the Expiration
Date, retain the Shares which have been tendered during the period or periods
for which the Offer is extended. In the event that the Purchaser waives any of
the conditions set forth in Section 14, the Commission may, if the waiver is
deemed to constitute a material change to the information previously provided
to the shareholders, require that the Offer remain open for an additional
period of time and/or that the Purchaser disseminate information concerning
such waiver.
 
  The Purchaser expressly reserves the right (but shall not be obligated) to
waive or reduce the Minimum Condition and to accept for payment pursuant to the
Offer less than two-thirds of the total number of outstanding Shares on a fully
diluted basis on the date of purchase.
 
  The Purchaser expressly reserves the right, in its sole discretion, at any
time and from time to time, to extend the period during which the Offer is open
for any reason, including, without limitation, the occurrence of any of the
events or non-satisfaction of any of the conditions specified in the
Introduction or in Section 14, by giving oral or written notice of such
extension to the Depositary. During any such extension, all Shares previously
tendered and not properly withdrawn will remain subject to the Offer, subject
to the right of a tendering shareholder to withdraw such shareholder's Shares.
See Section 4. UNDER NO CIRCUMSTANCES WILL INTEREST BE PAID ON THE PURCHASE
PRICE FOR TENDERED SHARES AND RIGHTS, WHETHER OR NOT THE PURCHASER EXERCISES
ITS RIGHT TO EXTEND THE OFFER.
 
  Subject to the applicable regulations of the Commission, the Purchaser also
expressly reserves the right, in its sole discretion, at any time or from time
to time, to (i) delay acceptance for payment of or, regardless of whether such
Shares were theretofore accepted for payment, payment for any Shares pending
receipt of any required regulatory or governmental approvals, (ii) terminate
the Offer (whether or not any Shares have theretofore been accepted for
payment) if any condition referred to in the Introduction or in Section 14 has
not been satisfied or upon the occurrence of any event specified in the
conditions set forth in the Introduction or in Section 14 and (iii) waive any
condition or otherwise amend the Offer in any respect, in each case, by giving
oral or written notice of such delay, termination, waiver or amendment to the
Depositary and, other than in the case of any such waiver, by making a public
announcement thereof. The Purchaser acknowledges (a) that Rule 14e-l(c) under
the Exchange Act requires the Purchaser to pay the consideration offered or
 
                                       6
<PAGE>
 
return the Shares tendered promptly after the termination or withdrawal of the
Offer and (b) that the Purchaser may not delay acceptance for payment of, or
payment for (except as provided in clause (i) of the preceding sentence), any
Shares upon the occurrence of any event specified in the conditions set forth
in the Introduction or in Section 14 without extending the period of time
during which the Offer is open.
 
  The rights reserved by the Purchaser in the preceding paragraph are in
addition to the Purchaser's rights pursuant to Section 14. Any such extension,
delay, termination or amendment will be followed as promptly as practicable by
public announcement thereof, and such announcement in the case of an extension
will be made no later than 9:00 a.m., New York City time, on the next business
day after the previously scheduled Expiration Date. Without limiting the manner
in which the Purchaser may choose to make any public announcement, subject to
applicable law (including, without limitation, Rules 14d-4(c) and 14d-6(d)
under the Exchange Act, which require that material changes be promptly
disseminated to holders of Shares), the Purchaser shall have no obligation to
publish, advertise or otherwise communicate any such public announcement other
than by issuing a release to the Dow Jones News Service.
 
  If the Purchaser makes a material change in the terms of the Offer, or if it
waives a material condition to the Offer, the Purchaser will extend the Offer
and disseminate additional tender offer materials to the extent required by
Rules 14d-4(c) and 14d-6(d) under the Exchange Act. The minimum period during
which an offer must remain open following material changes in the terms of the
offer, other than a change in price or a change in percentage of securities
sought, will depend upon the facts and circumstances, including, without
limitation, the materiality of the changes. With respect to a change in price
or, subject to certain limitations, a change in the percentage of securities
sought, a minimum ten business day period from the date of such change is
generally required to allow for adequate dissemination to shareholders.
Accordingly, if prior to the Expiration Date, the Purchaser decreases the
number of Shares being sought, or increases or decreases the consideration
offered pursuant to the Offer, and if the Offer is scheduled to expire at any
time earlier than the period ending on the tenth business day from the date
that notice of such increase or decrease is first published, sent or given to
holders of Shares, the Offer will be extended at least until the expiration of
such ten business day period. For purposes of the Offer, a "business day" means
any day other than a Saturday, Sunday or a federal holiday and consists of the
time period from 12:01 a.m. through 12:00 midnight, Eastern time.
 
  A demand is being made to the Company pursuant to both Illinois law and Rule
14d-5 under the Exchange Act for the use of the Company's shareholder list and
security position listings for the purpose of disseminating the Offer to
holders of Shares and communicating with shareholders regarding proxy
solicitations in connection with a meeting of shareholders. Upon compliance by
the Company with such request, this Offer to Purchase and the related Letter of
Transmittal and, if required, other relevant materials will be mailed to record
holders of Shares whose names appear on the Company's shareholder list and will
be furnished to brokers, dealers, commercial banks, trust companies and similar
persons whose names, or the names of whose nominees, appear on the list of
holders of Shares, and the list of holders of Rights, if applicable, or who are
listed as participants in a clearing agency's security position listing for
subsequent transmittal to beneficial owners of Shares and Rights.
 
2. ACCEPTANCE FOR PAYMENT AND PAYMENT FOR SHARES
 
  Upon the terms and subject to the conditions of the Offer (including, if the
Offer is extended or amended, the terms and conditions of the Offer as so
extended or amended), the Purchaser will purchase, by accepting for payment,
and will pay for, all Shares validly tendered and not properly withdrawn (as
permitted by Section 4) on or prior to the Expiration Date as soon as
practicable after the later to occur of (i) the Expiration Date or (ii) the
satisfaction or waiver of the conditions to the Offer set forth in the
Introduction and in Sections 14 and 15. All questions as to the satisfaction of
such terms and conditions will be determined by the Purchaser in its sole
discretion, which determination will be final, conclusive and binding upon all
parties.
 
                                       7
<PAGE>
 
See Sections 1, 14 and 15. In addition, subject to applicable rules of the
Commission, the Purchaser expressly reserves the right to delay acceptance for
payment of, or payment for, Shares pending receipt of any required regulatory
or governmental approvals.
 
  Parent filed a Notification and Report form with respect to the Offer under
the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, and the
regulations thereunder (the "HSR Act") on July 24, 1995. The waiting period
under the HSR Act with respect to the Offer will expire at 11:59 p.m., New York
City time, on August 8, 1995, unless early termination of the waiting period is
granted. However, the Antitrust Division of the Department of Justice (the
"Antitrust Division") or the Federal Trade Commission (the "FTC") may extend
the waiting period by requesting additional information or documentary material
from the Parent. If such a request is made, such a waiting period will expire
at 11:59 p.m., New York City time, on the tenth day after substantial
compliance by Parent with such request. See Section 15 for additional
information concerning the HSR Act and the applicability of the antitrust laws
to the Offer.
 
  In all cases, payment for Shares tendered and accepted for payment pursuant
to the Offer will be made only after timely receipt by the Depositary of (i)
Share Certificates for such Shares and, if applicable, Rights Certificates for
the associated Rights, or timely confirmation (a "Book-Entry Confirmation") of
the book-entry transfer of such Shares and, if applicable, Rights into the
Depositary's account at The Depositary Trust Company, the Midwest Securities
Trust Company and the Philadelphia Depositary Trust Company (collectively, the
"Book-Entry Transfer Facilities") pursuant to the procedures set forth in
Section 3, (ii) the Letter of Transmittal (or a facsimile thereof), properly
completed and duly executed, with any required signature guarantees, or an
Agent's Message (as defined herein) in connection with a book-entry transfer
and (iii) any other documents required by the Letter of Transmittal.
 
  The term "Agent's Message" means a message transmitted by a Book-Entry
Transfer Facility to, and received by, the Depositary and forming a part of a
Book-Entry Confirmation, which states that such Book-entry Transfer Facility
has received an express acknowledgment from the participant in such Book-Entry
Transfer Facility tendering the Shares and, if applicable, the Rights which are
the subject of such Book-Entry Confirmation that such participant has received
and agrees to be bound by the terms of the Letter of Transmittal and that the
Purchaser may enforce such agreement against such participant.
 
  Unless and until the Purchaser declares that the Rights Condition is
satisfied, if Rights Certificates have been distributed to holders of Shares,
such holders are required to tender, or make book-entry transfer of, Rights
Certificates representing a number of Rights equal to the number of Shares
being tendered in order to effect a valid tender of such Shares.
 
  For purposes of the Offer, the Purchaser will be deemed to have accepted for
payment, and thereby purchased, Shares validly tendered and not properly
withdrawn as, if and when the Purchaser gives oral or written notice to the
Depositary of the Purchaser's acceptance of such Shares for payment pursuant to
the Offer. In all cases, upon the terms and subject to the conditions of the
Offer, payment for Shares purchased pursuant to the Offer will be made by
deposit of the purchase price therefor with the Depositary, which will act as
agent for tendering shareholders for the purpose of receiving payment from the
Purchaser and transmitting payment to validly tendering shareholders. UNDER NO
CIRCUMSTANCES WILL INTEREST ON THE PURCHASE PRICE FOR SHARES AND RIGHTS BE PAID
BY THE PURCHASER, REGARDLESS OF ANY DELAY IN MAKING SUCH PAYMENT. If, for any
reason whatsoever, acceptance for payment of or payment for any Shares tendered
pursuant to the Offer is delayed, or the Purchaser is unable to accept for
payment or pay for Shares tendered pursuant to the Offer, then, without
prejudice to the Purchaser's rights set forth herein, the Depositary may,
nevertheless, on behalf of the Purchaser and subject to Rule 14e-l(c) under the
Exchange Act, retain tendered Shares and such Shares may not be withdrawn
except to the extent that the tendering shareholder is entitled to and duly
exercises withdrawal rights as described in Section 4.
 
 
                                       8
<PAGE>
 
  If any tendered Shares are not purchased pursuant to the Offer for any
reason, or if Share Certificates are submitted representing more Shares than
are tendered, Share Certificates representing unpurchased or untendered Shares
will be returned, without expense to the tendering shareholder (or, in the case
of Shares delivered by book-entry transfer into the Depositary's account at a
Book-Entry Transfer Facility pursuant to the procedures set forth in Section 3,
such Shares will be credited to an account maintained within such Book-Entry
Transfer Facility), as promptly as practicable following the expiration,
termination or withdrawal of the Offer. In the event separate Rights
Certificates are issued, similar action will be taken with respect to
unpurchased and untendered Rights.
 
  IF, PRIOR TO THE EXPIRATION DATE, THE PURCHASER SHALL INCREASE THE
CONSIDERATION OFFERED TO HOLDERS OF SHARES PURSUANT TO THE OFFER, SUCH
INCREASED CONSIDERATION SHALL BE PAID TO ALL HOLDERS OF SHARES THAT ARE
PURCHASED PURSUANT TO THE OFFER, WHETHER OR NOT SUCH SHARES WERE TENDERED PRIOR
TO SUCH INCREASE IN CONSIDERATION.
 
  The Purchaser reserves the right to transfer or assign, in whole or from time
to time in part, to Parent, or to one or more of Parent's subsidiaries or
affiliates, the right to purchase all or any portion of the Shares and Rights
tendered pursuant to the Offer, but any such transfer or assignment will not
relieve the Purchaser of its obligations under the Offer or prejudice the
rights of tendering shareholders to receive payment for Shares validly tendered
and accepted for payment pursuant to the Offer.
 
3. PROCEDURES FOR TENDERING SHARES AND RIGHTS
 
 Valid Tender of Shares and Rights
 
  Except as set forth below, in order for Shares and (prior to the Distribution
Date) Rights to be validly tendered pursuant to the Offer, the Letter of
Transmittal (or a facsimile thereof), properly completed and duly executed,
together with any required signature guarantees, or an Agent's Message in
connection with a book-entry delivery of Shares and (prior to the Distribution
Date) Rights, and any other documents required by the Letter of Transmittal
must be received by the Depositary at one of its addresses set forth on the
back cover of this Offer to Purchase on or prior to the Expiration Date and
either (i) Share Certificates and, if applicable, Rights Certificates
representing tendered Shares and Rights must be received by the Depositary, or
such Shares and Rights must be tendered pursuant to the procedure for book-
entry transfer set forth below and Book-Entry Confirmation must be received by
the Depositary, in each case on or prior to the Expiration Date, or (ii) the
guaranteed delivery procedures set forth below must be complied with.
 
  IF THE PURCHASER DECLARES THAT THE RIGHTS CONDITION IS SATISFIED, THE
PURCHASER WILL NOT REQUIRE DELIVERY OF RIGHTS. UNLESS AND UNTIL THE PURCHASER
DECLARES THAT THE RIGHTS CONDITION IS SATISFIED, HOLDERS OF SHARES WILL BE
REQUIRED TO TENDER ONE ASSOCIATED RIGHT FOR EACH SHARE TENDERED IN ORDER TO
EFFECT A VALID TENDER OF SUCH SHARE. ACCORDINGLY, SHAREHOLDERS WHO SELL THEIR
RIGHTS SEPARATELY FROM THEIR SHARES AND DO NOT OTHERWISE ACQUIRE RIGHTS MAY NOT
BE ABLE TO SATISFY THE REQUIREMENTS OF THE OFFER FOR THE TENDER OF SHARES.
 
 Separate Delivery of Rights Certificates
 
  If the Distribution Date does not occur prior to the Expiration Date, a
tender of Shares will also constitute a tender of the associated Rights. If the
Distribution Date occurs and Rights Certificates are distributed to holders of
Shares prior to the time a holder's Shares are purchased pursuant to the Offer,
in order for Rights (and the corresponding Shares) to be validly tendered,
Rights Certificates representing a number of Rights equal to the number of
Shares tendered must be delivered to the Depositary or, if available, a Book-
Entry Confirmation received by the Depositary with respect thereto. If the
Distribution Date occurs and Rights Certificates are not distributed prior to
the time Shares are purchased pursuant to the Offer, Rights may be tendered
prior to a shareholder receiving Rights Certificates by use of the guaranteed
delivery procedure described below. In any case, a tender of Shares constitutes
an agreement by the tendering shareholder to deliver Rights Certificates
representing a number of Rights equal to the number of Shares
 
                                       9
<PAGE>
 
tendered pursuant to the Offer to the Depositary within five business days
after the date Rights Certificates are distributed. The Purchaser reserves the
right to require that the Depositary receive Rights Certificates, or a Book-
Entry Confirmation, if available, with respect to such Rights, prior to
accepting the related Shares for payment pursuant to the Offer if the
Distribution Date occurs prior to the Expiration Date.
 
  THE METHOD OF DELIVERY OF SHARE CERTIFICATES, RIGHTS CERTIFICATES (IF
APPLICABLE), THE LETTER OF TRANSMITTAL AND ALL OTHER REQUIRED DOCUMENTS,
INCLUDING, WITHOUT LIMITATION, DELIVERY THROUGH ANY BOOK-ENTRY TRANSFER
FACILITY, IS AT THE OPTION AND SOLE RISK OF THE TENDERING SHAREHOLDER, AND THE
DELIVERY WILL BE DEEMED MADE ONLY WHEN ACTUALLY RECEIVED BY THE DEPOSITARY. IF
DELIVERY IS BY MAIL, REGISTERED MAIL WITH RETURN RECEIPT REQUESTED, PROPERLY
INSURED, IS RECOMMENDED. IN ALL CASES, SUFFICIENT TIME SHOULD BE ALLOWED TO
ENSURE TIMELY DELIVERY.
 
 Book-Entry Transfer
 
  The Depositary will make a request to establish accounts with respect to the
Shares at each of the Book-Entry Transfer Facilities for purposes of the Offer
within two business days after the date of this Offer to Purchase. Any
financial institution that is a participant in the system of any Book-Entry
Transfer Facility may make book-entry delivery of Shares by causing such Book-
Entry Transfer Facility to transfer such Shares into the Depositary's account
at such Book-Entry Transfer Facility in accordance with such Book-Entry
Transfer Facility's procedures for such transfer. However, although delivery of
Shares may be effected through book-entry transfer into the Depositary's
account at a Book-Entry Transfer Facility, the Letter of Transmittal (or
facsimile thereof), properly completed and duly executed, together with any
required signature guarantees, or an Agent's Message in connection with a book-
entry transfer, and any other required documents must, in any case, be
transmitted to and received by the Depositary at one of its addresses set forth
on the back cover of this Offer to Purchase on or prior to the Expiration Date,
or the guaranteed delivery procedure set forth below must be complied with.
 
  If the Distribution Date occurs, to the extent that the Rights become
eligible for book-entry transfer under procedures established by a particular
Book-Entry Transfer Facility, the Depositary will also make a request to
establish an account with respect to the Rights at each of the Book-Entry
Transfer Facilities, but no assurance can be given that book-entry delivery of
Rights will be available. If book-entry delivery of Rights is available, the
foregoing book-entry transfer procedures will also apply to Rights. Otherwise,
if Rights Certificates have been issued, a tendering shareholder will be
required to tender Rights by means of physical delivery to the Depositary of
Rights Certificates (in which event references in this Offer to Purchase to
Book-entry Confirmations with respect to Rights will be inapplicable) or
pursuant to the guaranteed delivery procedure set forth below.
 
  DELIVERY OF DOCUMENTS TO A BOOK-ENTRY TRANSFER FACILITY IN ACCORDANCE WITH
SUCH BOOK-ENTRY TRANSFER FACILITY'S PROCEDURES DOES NOT CONSTITUTE DELIVERY TO
THE DEPOSITARY.
 
 Signature Guarantees
 
  Signatures on all Letters of Transmittal must be guaranteed by a firm that is
a bank, broker, dealer, credit union, savings association or other entity which
is a member in good standing of the Securities Transfer Agents Medallion
Program, the New York Stock Exchange Medallion Signature Guarantee Program or
the Stock Exchange Medallion Program (an "Eligible Institution"), unless the
Shares and Rights tendered thereby are tendered (i) by a registered holder of
Shares and Rights who has not completed either the box labeled "Special Payment
Instructions" or the box labeled "Special Delivery Instructions" on the Letter
of Transmittal or (ii) for the account of an Eligible Institution. See
Instruction I of the Letter of Transmittal.
 
  If the Share Certificates or Rights Certificates are registered in the name
of a person or persons other than the signer of the Letter of Transmittal, or
if payment is to be made to, or Share Certificates or Rights Certificates for
unpurchased Shares or Rights are to be issued or returned to, a person other
than the
 
                                       10
<PAGE>
 
registered holder, then the tendered certificates must be endorsed or
accompanied by appropriate stock powers, signed exactly as the name or names of
the registered holder or holders appear on the certificates, with the
signatures on the certificates or stock powers guaranteed by an Eligible
Institution as provided in the Letter of Transmittal. See Instructions 1 and 5
of the Letter of Transmittal.
 
  If the Share Certificates and Rights Certificates are forwarded separately to
the Depositary, a properly completed and duly executed Letter of Transmittal
(or facsimile thereof) must accompany each such delivery.
 
Guaranteed Delivery
 
  If a shareholder desires to tender Shares and Rights pursuant to the Offer
and such shareholder's Share Certificates or, if applicable, Rights
Certificates are not immediately available (including, if the Distribution Date
has occurred, because Rights Certificates have not yet been distributed) or
time will not permit all required documents to reach the Depositary on or prior
to the Expiration Date, or the procedures for Book-entry transfer cannot be
completed on a timely basis, such Shares or Rights may nevertheless be tendered
if all of the following guaranteed delivery procedures are duly complied with:
 
    (i) such tender is made by or through an Eligible Institution;
 
    (ii) a properly completed and duly executed Notice of Guaranteed
  Delivery, substantially in the form made available by the Purchaser, is
  received by the Depositary, as provided below, on or prior to the
  Expiration Date; and
 
    (iii) the Share Certificates and Rights Certificates (or a Book-Entry
  Confirmation) representing all tendered Shares and Rights, in proper form
  for transfer together with a properly completed and duly executed Letter of
  Transmittal (or facsimile thereof), with any required signature guarantees
  (or, in the case of a book-entry transfer, an Agent's Message) and any
  other documents required by the Letter of Transmittal are received by the
  Depositary within (a) in the case of Shares, five New York Stock Exchange,
  Inc. ("NYSE") trading days after the date of execution of such Notice of
  Guaranteed Delivery or (b) in the case of Rights, a period ending on the
  later of (1) five NYSE trading days after the date of execution of such
  Notice of Guaranteed Delivery or (2) five business days after the date
  Rights Certificates are distributed to shareholders.
 
  The Notice of Guaranteed Delivery may be delivered by hand or mail or
transmitted by facsimile transmission to the Depositary and must include a
guarantee by an Eligible Institution in the form set forth in such Notice of
Guaranteed Delivery and a representation that the shareholder on whose behalf
the tender is being made is deemed to own the Shares and, if applicable, Rights
being tendered within the meaning of Rule 14e-4 under the Exchange Act.
 
  Notwithstanding any other provision hereof, payment for Shares accepted for
payment pursuant to the Offer will in all cases be made only after timely
receipt by the Depositary of Share Certificates for, or of Book-Entry
Confirmation with respect to, such Shares, and if the Distribution Date has
occurred, Rights Certificates for, or a Book-Entry Confirmation, if available,
with respect to, such Rights (unless the Purchaser elects, in its sole
discretion, to make payment for such Shares pending receipt of the Rights
Certificates for, or a Book-Entry Confirmation, if available, with respect to,
such Rights), a properly completed and duly executed Letter of Transmittal (or
facsimile thereof), together with any required signature guarantees (or, in the
case of a book-entry transfer, an Agent's Message) and any other documents
required by the Letter of Transmittal. Accordingly, payment might not be made
to all tendering shareholders at the same time, and will depend upon when Share
Certificates (or Rights Certificates) are received by the Depositary or Book-
Entry Confirmations of such Shares (or Rights, if available) are received into
the Depositary's account at a Book-Entry Transfer Facility.
 
  If the Rights Condition is satisfied, the guaranteed delivery procedure with
respect to Rights Certificates and the requirement for the tender of Rights
will no longer apply.
 
                                       11
<PAGE>
 
 Backup Federal Income Tax Withholding
 
  UNDER THE FEDERAL INCOME TAX LAWS APPLICABLE TO CERTAIN SHAREHOLDERS
INCLUDING, AMONG OTHERS, ALL CORPORATIONS AND CERTAIN FOREIGN INDIVIDUALS, THE
DEPOSITARY MAY BE REQUIRED TO WITHHOLD 31% OF THE AMOUNT OF ANY PAYMENTS MADE
TO SUCH SHAREHOLDERS PURSUANT TO THE OFFER. TO PREVENT BACKUP FEDERAL INCOME
TAX WITHHOLDING WITH RESPECT TO PAYMENT TO CERTAIN TENDERING SHAREHOLDERS OF
THE PURCHASE PRICE OF SHARES PURCHASED PURSUANT TO THE OFFER, EACH SUCH
SHAREHOLDER MUST PROVIDE THE DEPOSITARY WITH SUCH SHAREHOLDER'S CORRECT
TAXPAYER IDENTIFICATION NUMBER AND CERTIFY THAT SUCH SHAREHOLDER IS NOT SUBJECT
TO BACKUP FEDERAL INCOME TAX WITHHOLDING BY COMPLETING THE SUBSTITUTE FORM W-9
INCLUDED IN THE LETTER OF TRANSMITTAL. SEE INSTRUCTION 9 OF THE LETTER OF
TRANSMITTAL.
 
 Appointment as Proxy
 
  By executing the Letter of Transmittal, a tendering shareholder irrevocably
appoints designees of the Purchaser, and each of them, as such shareholder's
attorneys-in-fact and proxies, with full power of substitution, in the manner
set forth in the Letter of Transmittal, to the full extent of such
shareholder's rights with respect to the Shares and, if applicable, Rights
tendered by such shareholder and accepted for payment by the Purchaser and with
respect to any and all other Shares or Rights and other securities or rights
issued or issuable in respect of such Shares and Rights on or after the date of
this Offer to Purchase. All such powers of attorney and proxies shall be
considered irrevocable and coupled with an interest in the tendered Shares and
Rights. Such appointment will be effective upon the acceptance for payment of
such Shares and Rights by the Purchaser in accordance with the terms of the
Offer. Upon such acceptance for payment, all other powers of attorney and
proxies given by such shareholder with respect to such Shares, Rights, and such
other securities or rights prior to such payment will be revoked, without
further action, and no subsequent powers of attorney and proxies nor any
subsequent written consents executed may be given by such shareholder (and, if
given or executed, will not be deemed effective). The designees of the
Purchaser will, with respect to the Shares and Rights and such other securities
and rights for which such appointment is effective, be empowered to exercise
all voting and other rights of such shareholder as they, in their sole
discretion, may deem proper at any annual or special meeting of the Company's
shareholders, or any adjournment or postponement thereof, or by consent in lieu
of any such meeting or otherwise. In order for Shares and Rights to be deemed
validly tendered, immediately upon the acceptance for payment of such Shares
and Rights, the Purchaser or its designee must be able to exercise full voting
rights with respect to such Shares, Rights and other securities, including,
without limitation, voting at any meeting of shareholders.
 
  The foregoing proxies are effective only upon acceptance for payment of
Shares pursuant to the Offer. The Offer does not constitute a solicitation of
proxies, absent a purchase of Shares, for any meeting of the Company's
shareholders, which would be made only pursuant to separate proxy solicitation
materials complying with the Exchange Act.
 
 Determination of Validity
 
  All questions as to the form of documents and the validity, eligibility
(including, without limitation, time of receipt) and acceptance for payment of
any tender of Shares or Rights will be determined by the Purchaser, in its sole
discretion, whose determination shall be final, conclusive and binding upon all
parties. The Purchaser reserves the absolute right to reject any or all tenders
determined by it not to be in proper form or the acceptance of or payment for
which may, in the opinion of Debevoise & Plimpton ("Purchaser's Counsel"), be
unlawful. The Purchaser also reserves the absolute right to waive any of the
conditions of the Offer or any defect or irregularity in any tender of Shares
or Rights of any particular shareholder whether or not similar defects or
irregularities are waived in the case of other shareholders.
 
  The Purchaser's interpretation of the terms and conditions of the Offer
(including, without limitation, the Letter of Transmittal and the instructions
thereto) will be final, conclusive and binding upon all parties. No tender of
Shares or Rights will be deemed to have been validly made until all defects and
irregularities
 
                                       12
<PAGE>
 
with respect to such tender have been cured or waived. None of Parent, the
Purchaser or any of their respective affiliates or assigns, the Dealer Manager,
the Depositary, the Information Agent or any other person or entity will be
under any duty to give any notification of any defects or irregularities in
tenders or incur any liability for failure to give any such notification.
 
 Other Requirements
 
  The Purchaser's acceptance for payment of Shares and, if applicable, Rights
tendered pursuant to any of the procedures described above will constitute a
binding agreement between the tendering shareholder and the Purchaser upon the
terms and subject to the conditions of the Offer, including the tendering
shareholder's representation and warranty that the shareholder is the holder of
the Shares within the meaning of, and that the tender of the Shares and Rights
complies with, Rule 14e-4 under the Exchange Act.
 
4. WITHDRAWAL RIGHTS
 
  Except as otherwise provided in this Section 4, tenders of Shares and Rights
made pursuant to the Offer are irrevocable. Shares and Rights tendered pursuant
to the Offer may be withdrawn at any time on or prior to the Expiration Date
and, unless theretofore accepted for payment by the Purchaser as provided
herein, may also be withdrawn at any time after September 21, 1995, (or such
later date as may apply in case the Offer is extended). A withdrawal of Shares
will also constitute a withdrawal of the associated Rights. Rights may not be
withdrawn unless the associated Shares are also withdrawn.
 
  If, for any reason whatsoever, acceptance for payment of any Shares and
Rights tendered pursuant to the Offer is delayed, or the Purchaser is unable to
accept for payment or pay for Shares and Rights tendered pursuant to the Offer,
then, without prejudice to the Purchaser's rights set forth herein, the
Depositary may, nevertheless, on behalf of the Purchaser, retain tendered
Shares and Rights and such Shares and Rights may not be withdrawn except to the
extent that the tendering shareholder is entitled to and duly exercises
withdrawal rights as described in this Section 4. Any such delay will be by an
extension of the Offer to the extent required by law.
 
  In order for a withdrawal to be effective, a written or facsimile
transmission notice of withdrawal must be timely received by the Depositary at
one of its addresses set forth on the back cover of this Offer to Purchase. Any
such notice of withdrawal must specify the name of the person who tendered the
Shares and Rights to be withdrawn, the number of Shares and Rights to be
withdrawn, and (if Share Certificates and Rights Certificates have been
tendered) the name of the registered holder of the Shares and Rights as set
forth in the Share Certificate and Rights Certificate, if different from that
of the person who tendered such Shares and Rights. If Share Certificates and
Rights Certificates have been delivered or otherwise identified to the
Depositary, then prior to the physical release of such certificates, the
tendering shareholder must submit the serial numbers shown on the particular
certificates evidencing the Shares and Rights to be withdrawn and the signature
on the notice of withdrawal must be guaranteed by an Eligible Institution,
except in the case of Shares and Rights tendered for the account of an Eligible
Institution. If Shares and Rights have been tendered pursuant to the procedures
for book-entry transfer set forth in Section 3, the notice of withdrawal must
specify the name and number of the account at the appropriate Book-Entry
Transfer Facility to be credited with the withdrawn Shares and Rights, in which
case a notice of withdrawal will be effective if delivered to the Depositary by
any method of delivery described in the first sentence of this paragraph.
Withdrawals of Shares and Rights may not be rescinded. Any Shares and Rights
properly withdrawn will be deemed not validly tendered for purposes of the
Offer, but may be retendered at any subsequent time prior to the Expiration
Date by following any of the procedures described in Section 3.
 
  All questions as to the form and validity (including, without limitation,
time of receipt) of notices of withdrawal will be determined by the Purchaser,
in its sole discretion, whose determination shall be final, conclusive and
binding upon all parties. None of Parent, the Purchaser or any of their
respective affiliates or assigns, the Dealer Manager, the Depositary, the
Information Agent or any other person or entity will be
 
                                       13
<PAGE>
 
under any duty to give any notification of any defects or irregularities in any
notice of withdrawal or incur any liability for failure to give any such
notification.
 
5. CERTAIN FEDERAL INCOME TAX CONSEQUENCES
 
  The summary of tax consequences set forth below is for general information
only and is based on the law as currently in effect. The tax treatment of each
shareholder will depend in part upon such shareholder's particular situation.
The receipt of cash for Shares pursuant to the Offer or the Proposed Merger
will be a taxable transaction for federal income tax purposes and may also be a
taxable transaction under applicable state, local, foreign and other tax laws.
For federal income tax purposes under the Internal Revenue Code of 1986, as
amended, each selling or exchanging shareholder would generally recognize gain
or loss equal to the difference between the amount of cash received and such
shareholder's tax basis for the sold or exchanged Shares. For federal income
tax purposes, such gain or loss will be capital gain or loss (assuming the
Shares are held as a capital asset by such shareholder) and any such capital
gain or loss will be long term if, as of the date the Purchaser accepts the
Shares for payment pursuant to the Offer or the effective date of the Proposed
Merger, as the case may be, the Shares were held for more than one year or will
be short term if, as of such date, the Shares were held for one year or less.
 
  If a redemption of the Rights occurs prior to the Distribution Date, the
amount distributed should be treated as a dividend. The tax consequences of a
redemption occurring after the Distribution Date are unclear, and each holder
should consult his or her own tax adviser.
 
  If the sale of Shares and Rights occurs after the Distribution Date, the cash
received should be allocated between the Share and Rights based upon their
relative fair market values, and gain (or loss) should be computed separately
with respect to Shares and Rights as described above.
 
  The foregoing discussion may not be applicable to certain types of
shareholders, including, without limitation, shareholders who acquired Shares
pursuant to the exercise of employee stock options or otherwise as
compensation, individuals who are not citizens or residents of the United
States and foreign corporations, or entities that are otherwise subject to
special tax treatment under the Internal Revenue Code of 1986, as amended (such
as insurance companies, tax-exempt entities and regulated investment
companies).
 
  A bill recently passed the United States House of Representatives and is
pending before the United States Senate to reduce the effective tax rates
applicable to net long-term capital gains. These proposals would apply
generally to transactions effected after December 31, 1994. In addition, for
taxable years beginning after December 31, 1995, the proposals would further
limit the deduction for long-term capital losses. Therefore, if these proposals
were enacted into law, gains from the sale or conversion of Shares pursuant to
the Offer or the Proposed Merger which constituted long-term capital gains
would generally be taxed at reduced effective tax rates. However, there can be
no assurance that these or other proposals will be enacted and, if enacted, the
effective dates of the proposals or the particular type of transactions or
assets to which the proposals apply could be modified. If the proposals were
enacted with an effective date subsequent to the Expiration Date of the Offer,
the sale or conversion of Shares pursuant to the Offer or the Proposed Merger
which constituted long-term capital gains would be taxed at the higher rates
currently in effect. Shareholders of the Company should consult their tax
advisors about the impact of this proposed legislation.
 
  THE FEDERAL INCOME TAX DISCUSSION SET FORTH ABOVE IS INCLUDED FOR GENERAL
INFORMATION ONLY. EACH SHAREHOLDER IS URGED TO CONSULT SUCH SHAREHOLDER'S TAX
ADVISOR WITH RESPECT TO THE TAX CONSEQUENCES TO SUCH SHAREHOLDER OF THE OFFER
AND PROPOSED MERGER, INCLUDING, WITHOUT LIMITATION, THE APPLICABILITY AND
EFFECT OF FEDERAL, STATE, LOCAL AND FOREIGN TAX LAWS.
 
6. PRICE RANGE OF THE SHARES AND RIGHTS; DIVIDENDS
 
  According to the Company's 1994 10-K, the Shares are listed and traded on the
NASDAQ National Market System (the "NASDAQ-NMS") under the symbol "JOSL". The
following table sets forth, for fiscal
 
                                       14
<PAGE>
 
years 1993 and 1994, the high and low bid market price quotations for the
Shares as reported in the Company's 1994 10-K and the cash dividends per common
share, and for fiscal year 1995 the high and low sales prices for the Shares on
the NASDAQ-NMS as reported by published financed sources and the cash dividends
per common share.
 
                               JOSLYN CORPORATION
 
<TABLE>
<CAPTION>
                                                                         CASH
                                                       HIGH    LOW     DIVIDENDS
                                                       ----    ----    ---------
<S>                                                    <C>     <C>     <C>
FISCAL YEAR ENDED DECEMBER 31, 1993
  First Quarter....................................... $ 27     $23 1/4   $.29
  Second Quarter......................................   28      22 1/2    .29
  Third Quarter.......................................   27 1/2  24 3/4    .29
  Fourth Quarter......................................   25      23 1/2    .29
FISCAL YEAR ENDED DECEMBER 31, 1994
  First Quarter....................................... $ 25 1/4 $22 3/4   $.30
  Second Quarter......................................   25      23        .30
  Third Quarter.......................................   31      25        .30
  Fourth Quarter......................................   27      24 3/4    .30
FISCAL YEAR ENDED DECEMBER 31, 1995
  First Quarter....................................... $ 27 3/4 $24 1/2   $.30
  Second Quarter......................................   26 1/2  24 1/2    .30
  Third Quarter (through July 21, 1995)...............   35 1/4  24 3/4    .30
</TABLE>
 
  On July 7, 1995, the last full day of trading prior to the delivery of the
letter proposing the acquisition of the Company by Parent (as set forth in
Section 10), the closing sales price on the NASDAQ-NMS for the Shares was $24
3/4 per Share. On July 21, 1995, the last full day of trading prior to the
announcement of the Offer, the closing sales price on the NASDAQ-NMS for the
Shares was $35 per Share. SHAREHOLDERS ARE URGED TO OBTAIN A CURRENT MARKET
QUOTATION FOR THE SHARES.
 
  The Purchaser believes, based upon publicly available information, that as of
the date of the Offer, all Rights are attached to the associated Shares and are
not traded separately. Upon the occurrence of the Distribution Date, the Rights
are to detach, and may trade separately, from the Shares. See Section 11. As a
result of the announcement by the Purchaser of the Offer, the Purchaser
believes that the Distribution Date will be August 7, 1995 unless prior to such
date the Company's Board of Directors redeems the Rights or takes action to
delay the Distribution Date. The Distribution Date may also occur sooner. See
Section 11. IF THE DISTRIBUTION DATE OCCURS AND THE RIGHTS BEGIN TO TRADE
SEPARATELY FROM THE SHARES, SHAREHOLDERS ARE ALSO URGED TO OBTAIN A CURRENT
MARKET QUOTATION, IF ANY, FOR THE RIGHTS.
 
7. POSSIBLE EFFECTS OF THE OFFER ON THE MARKET FOR THE SHARES AND RIGHTS; STOCK
   EXCHANGE LISTING, EXCHANGE ACT REGISTRATION; MARGIN REGULATIONS
 
 Possible Effects of the Offer on the Market for the Shares and Rights
 
  The purchase of Shares pursuant to the Offer will reduce the number of Shares
that might otherwise trade publicly and could adversely affect the liquidity
and market value of the remaining Shares held by the public. The purchase of
Shares pursuant to the Offer can also be expected to reduce the number of
holders of Shares. The Purchaser cannot predict whether the reduction in the
number of Shares that might otherwise trade publicly would have an adverse or
beneficial effect on the market price for or marketability of the Shares or
whether it would cause future market prices to be greater or less than the
Offer price therefor.
 
                                       15
<PAGE>
 
 Stock Exchange Listing
 
  The Shares are currently listed and traded on the NASDAQ-NMS, which
constitutes the principal trading market for the Shares. Depending upon the
subsequent aggregate market value of Shares not purchased pursuant to the
Offer, the Shares may no longer meet the standards for continuing inclusion in
the NASDAQ-NMS, which requires that an issuer have at least 200,000 publicly
held shares, held by at least 400 shareholders or 300 shareholders of round
lots, with a market value of at least $1,000,000. If these standards were not
met, quotations might continue to be published by the National Association of
Securities Dealers, Inc. ("NASD") in the over-the-counter "additional list" or
in one of the "local lists," but if the number of holders of Shares falls below
300, the number of publicly held Shares falls below 100,000, or there are not
at least two market makers for the Shares, NASD rules provide that the Shares
may no longer be "authorized" for quotation by the National Association of
Securities Dealers Automated Quotation System ("NASDAQ"), and NASDAQ may cease
to provide any quotations on any such lists. Shares held directly or indirectly
by any officer or director of the Company or by a beneficial owner of more than
10% of the Shares will ordinarily not be considered as being publicly held for
purposes of calculating NASDAQ-NMS and NASDAQ minimum listing requirements.
 
  According to the Company's 1994 10-K, as of December 31, 1994, there were
3,075 holders of record of the Shares and, as of March 1, 1995, there were
7,160,819 Shares outstanding. If, as a result of the purchase of Shares
pursuant to the Offer or otherwise, the Shares no longer meet the requirements
of NASDAQ-NMS for continued listing and the listing of the Shares is
discontinued on NASDAQ-NMS, the market for and trading in the Shares could be
adversely affected.
 
  In the event the Shares are no longer eligible for NASDAQ quotation,
quotations might still be available from other sources. The extent of the
public market for the Shares and availability of such quotations would,
however, depend upon the number of holders of the Shares remaining at the time,
the interest in maintaining a market in the Shares on the part of securities
firms, the possible termination of registration of the Shares under the
Exchange Act, as described below, and other factors. The Purchaser cannot
predict whether the reduction in the number of Shares that might otherwise
trade, or the termination of registration of outstanding Shares under the
Exchange Act, would have an adverse effect on the market price for or the
marketability of the Shares.
 
 Exchange Act Registration
 
  The Shares are currently registered under the Exchange Act. Registration of
the Shares may be terminated upon application by the Company to the Commission
if the Shares are not listed on a "national securities exchange" or quoted on
NASDAQ and there are fewer than 300 record holders of Shares. According to the
Company's 1994 10-K, as of December 31, 1994, the number of record holders was
not below 300. The purchase of the Shares pursuant to the Offer may result in
the Shares becoming eligible for deregistration under the Exchange Act.
Termination of registration of the Shares under the Exchange Act would
substantially reduce the information required to be furnished by the Company to
its shareholders and the Commission and would make certain provisions of the
Exchange Act, such as the short-swing profit recovery provisions of Section
16(b) and the requirements of furnishing a proxy statement in connection with
shareholders' meetings pursuant to Section 14(a) or 14(c) and the related
requirement of an annual report, no longer applicable to the Company. If the
Shares are no longer registered under the Exchange Act, the requirements of
Rule 13e-3 under the Exchange Act with respect to "going private" transactions
would no longer be applicable to the Company. Furthermore, the ability of
"affiliates" of the Company and persons holding "restricted securities" of the
Company to dispose of such securities pursuant to Rule 144 promulgated under
the Securities Act of 1933, as amended, may be impaired or, with respect to
certain persons, eliminated. If registration of the Shares under the Exchange
Act were terminated, the Shares would no longer be "margin securities" or be
eligible for NASDAQ reporting. The Purchaser believes that the purchase of the
Shares pursuant to the Offer may result in the Shares becoming eligible for
deregistration under the Exchange Act.
 
                                       16
<PAGE>
 
It would be the intention of the Purchaser to cause the Company to make an
application for termination of registration of the Shares as soon as possible
after successful completion of the Offer, if the Shares are then eligible for
such termination.

  Based upon publicly available information, the Purchaser believes that, as of
the date of this Offer to Purchase, the Rights are registered under the
Exchange Act, but are attached to the Shares and are not separately
transferable. As a result of the announcement by the Purchaser of the Offer,
the Purchaser believes that the Distribution Date will be August 7, 1995
unless, prior to such date, the Company's Board of Directors redeems the Rights
or takes action to delay the Distribution Date. See Section 11. According to
the Rights Agreement, as soon as practicable following the Distribution Date,
Rights Certificates will be sent to all holders of Rights and thereafter the
Rights Certificates will alone evidence the Rights. See Section 11. If the
Distribution Date occurs and the Rights separate from the Shares, the foregoing
discussion with respect to the effect of the Offer on the market for the
Shares, stock exchange listing and Exchange Act registration would apply to the
Rights in a similar manner.
 
  If registration of the Shares and the Rights is not terminated prior to the
Proposed Merger, then the Shares and the Rights will cease to be eligible for
listing on the NASDAQ-NMS and the registration of the Shares and the Rights
under the Exchange Act will be terminated following the consummation of the
Proposed Merger.

 Margin Regulations
 
  The Shares are currently "margin securities" under the regulations of the
Board of Governors of the Federal Reserve System (the "Federal Reserve Board"),
which have the effect, among other things, of allowing brokers to extend credit
on the collateral of such Shares for the purpose of buying, carrying or trading
in securities ("Purpose Loans"). Depending upon factors such as the number of
record holders of the Shares and the number and market value of publicly held
Shares, following the purchase of Shares pursuant to the Offer, the Shares
might no longer constitute "margin securities" for purposes of the Federal
Reserve Board's margin regulations and, therefore, could no longer be used as
collateral for Purpose Loans made by brokers. In addition, if registration of
the Shares under the Exchange Act were terminated, the Shares would no longer
constitute "margin securities."

8. CERTAIN INFORMATION CONCERNING THE COMPANY
 
  The information concerning the Company contained in this Offer to Purchase,
including financial information, has been taken from or based upon publicly
available documents and records on file with the Commission and other public
sources. The summary information concerning the Company in this Section 8 and
elsewhere in this Offer to Purchase is derived from the Company's 1994 10-K and
other publicly available information. The summary information set forth below
is qualified in its entirety by reference to such reports (which may be
obtained and inspected as described below) and should be considered in
conjunction with the more comprehensive financial and other information in such
reports (including, without limitation, management's discussion and analysis of
results of operation and financial position) and other publicly available
reports and documents filed by the Company with the Commission and other
publicly available information. Although the Purchaser and Parent do not have
any knowledge that would indicate that any statements contained herein based
upon such reports are untrue in any material respect, neither the Purchaser nor
Parent assumes any responsibility for the accuracy or completeness of the
information contained therein, or for any failure by the Company to disclose
events that may have occurred and may affect the significance or accuracy of
any such information but which are unknown to the Purchaser and Parent.
 
  The Company is an Illinois corporation with its principal executive offices
located at 30 South Wacker Drive, Chicago, IL 60606. The following description
of the Company's business has been taken from the Company's 1994 10-K:
 
    The Company is a holding company for a number of subsidiaries which are
  engaged primarily in the manufacturing and supplying of electrical
  hardware, apparatus, protective equipment, air pressurization and
  dehydration products, and services used in the construction and maintenance
  of transmission and distribution facilities to electric power and telephone
  companies. The Company's
 
                                       17
<PAGE>
 
  subsidiaries also manufacture and supply vacuum switchgear and electrical
  controls to commercial and industrial markets as well as protective
  equipment, connector backshells, and air and gas dehydration systems to
  aerospace and defense companies.
 
  On July 5, 1995, the Company filed with the Commission a current report on
Form 8-K in which it described a press release issued by the Company on June
28, 1995 announcing its acquisition of all of the issued and outstanding common
shares of Cyberex, Inc., a privately held company which is a maker of, among
other things, uninterruptible power systems, static transfer switches, line
voltage regulators, inverter/static switches, regulated rectifiers, and related
power conditioning products. According to the press release, the total purchase
price for the shares was $22 million.
 
  The selected financial information of the Company and its consolidated
subsidiaries set forth below has been excerpted and derived from the Company's
1994 10-K, the Company's First Quarter 10-Q, the Company's Quarterly Report on
Form 10-Q for the quarter ended March 31, 1994 filed with the Commission
pursuant to the Exchange Act and other publicly available information. The
financial information set forth below is qualified in its entirety by reference
to such reports and documents filed with the Commission and all of the
financial statements and related notes contained therein. These reports and
other documents may be examined and copies thereof may be obtained in the
manner set forth herein.
 
                                       18
<PAGE>
 
                               JOSLYN CORPORATION
 
                         SELECTED FINANCIAL INFORMATION
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)
 
<TABLE>
<CAPTION>
                          3 MONTHS ENDED MAR. 31,    FISCAL YEAR ENDED DEC. 31,
                          -------------------------  -------------------------------
                              1995         1994
                          (UNAUDITED)   (UNAUDITED)    1994       1993(1)     1992
                          ------------  -----------  --------     --------  --------
<S>                       <C>           <C>          <C>          <C>       <C>
INCOME STATEMENT DATA
 Net Sales..............   $    56,523   $    53,919 $216,177     $217,707  $217,889
 Net Income (loss)......         3,494         3,746  (11,180)(2)   14,870    14,308
 Earnings (loss) per
  share.................           .49           .53    (1.57)       (2.10)     2.03
BALANCE SHEET DATA (at
 Period End)
 Total Assets...........   $   177,964   $   160,432 $177,504     $162,282  $158,159
 Working Capital........        77,211        74,721   75,959       73,041    64,928
 Total Shareholders' Eq-
  uity..................        82,245       101,008   80,626       99,235    92,097
</TABLE>
- --------
(1) The Company adopted SFAS No. 109, "Accounting for Income Taxes," in 1993
    and elected to apply it retroactively to 1990.
 
(2) Includes a charge of $35.0 million before taxes and $21.0 million after
    taxes for increased environmental reserves and a charge of $6.2 million
    before taxes and $4.1 million after taxes to write down two businesses and
    for costs related to the reduction of corporate expense (See Notes 6 and 10
    to the Company's financial statements contained in the Company's 1994 10-
    K).
 
  On July 19, 1995, the Company issued a press release including the following
information with respect to the quarter and the six month period ended June 30,
1995.
 
<TABLE>
<CAPTION>
                                                     SIX MONTHS ENDED JUN. 30,
                                                     ---------------------------
                                                         1995           1994
                                                      (UNAUDITED)    (UNAUDITED)
                                                     -------------  ------------
<S>                                                  <C>            <C>
INCOME STATEMENT DATA
 Net Sales.........................................   $    114,069   $    108,391
 Net Income........................................          7,714          7,102
 Earnings per share................................           1.08           1.00
</TABLE>
 
  The Company is subject to the information and reporting requirements of the
Exchange Act and, in accordance therewith, is required to file periodic
reports, proxy statements and other information with the Commission relating to
its business, financial condition and other matters. Certain information, as of
particular dates, concerning the Company's business, principal physical
properties, capital structure, material pending legal proceedings, operating
results, financial condition, directors and officers (including, without
limitation, their remuneration and the stock options granted to them), the
principal holders of the Company's securities, any material interests of such
persons in transactions with the Company and certain other matters is required
to be disclosed in proxy statements and annual reports distributed to the
Company's shareholders and filed with the Commission. Such reports, proxy
statements and other information may be inspected and copied at the
Commission's public reference facilities at Judiciary Plaza, 450 Fifth Street,
N.W., Washington, D.C. 20549, and should also be available for inspection at
the following regional offices of the Commission: 7 World Trade Center, New
York, New York 10048 and 500 West Madison Street, Chicago, Illinois 60661-2511;
and copies may be obtained by mail at prescribed rates from the principal
office of the Commission at 450 Fifth Street, N.W., Washington, D.C. 20549.
Such reports, proxy statements and other information should also be available
for inspection at the offices of NASD at 33 Whitehall Street, New York, New
York 10004.
 
9. CERTAIN INFORMATION CONCERNING THE PURCHASER AND PARENT
 
  The Purchaser is a newly incorporated Delaware corporation and an indirect
wholly owned subsidiary of Parent which to date has not conducted any business
other than in connection with the Offer and the Proposed Merger. The principal
executive offices of Parent and the Purchaser are located at 1250 24th Street,
N.W., Suite 800, Washington, D.C. 20037.
 
                                       19
<PAGE>
 
  Parent is a Delaware corporation which operates a variety of businesses
through its wholly owned subsidiaries. These businesses are conducted in three
business segments: Tools, Process/Environmental Controls and Transportation.
Parent is the principal manufacturer of Sears, Roebuck and Co.'s Craftsman line
and the National Automotive Parts Association line of mechanics' hand tools.
Parent also manufactures Allen wrenches and Jacobs drill chucks and is a
leading supplier of mechanics' hand tools through Matco Tools. In its
Process/Environmental Controls segment, Parent is a leading producer of leak
detection sensors for underground fuel storage tanks and motion, temperature,
pressure and flow control devices. Parent's Transportation business
manufactures wheel service equipment, diesel engine retarders and automotive
air conditioning components which are sold under such brand names as Coats,
Ammco and "Jake Brake."
 
  Parent has agreed to purchase 56% of the outstanding shares of Total
Containment, Inc., a Delaware corporation ("Total Containment") which serves
the environmental requirements of the retail petroleum industry. Subject to
approval from the Board of Directors and public shareholders of Total
Containment, Parent may also purchase the remaining 44% of such shares. If
completed, the total cost to Parent of such purchases will be approximately $49
million.
 
  Approximately 34.3% of the outstanding common stock of Parent is beneficially
owned by Equity Group Holdings ("EGH" and, together with Parent and the
Purchaser, the "Purchaser Entities"), a District of Columbia general
partnership of which Steven M. Rales and Mitchell P. Rales, each of whom is a
director and executive officer of Parent and a director of Purchaser, are the
general partners. Together with certain other shares of common stock which are
beneficially owned by such individuals, such individuals beneficially own
approximately 43.1% of the outstanding common stock of Parent. EGH is
principally engaged in the business of investing in manufacturing companies,
radio broadcasting, companies and publicly traded securities. The principal
executive offices of EGH are located at 1250 24th Street, N.W., Suite 800,
Washington, D.C. 20037.
 
  The name, citizenship, business address, present principal occupation or
employment and five-year employment history of each of the directors and
executive officers of the Purchaser and Parent are set forth in Schedule I
hereto.
 
  Until immediately prior to the time the Purchaser will purchase Shares
pursuant to the Offer, it is not anticipated that the Purchaser will have any
significant assets or liabilities or engage in activities other than those
incident to its formation and capitalization and the transactions contemplated
by the Offer and the Proposed Merger. Because the Purchaser is a newly formed
corporation and has minimal assets and capitalization, no meaningful financial
information regarding the Purchaser is available.
 
  Parent is subject to the informational filing requirements of the Exchange
Act and is required to file reports and other information with the Commission
relating to its business, financial condition and other matters. Information,
as of particular dates, concerning Parent's directors and officers, their
remuneration, options granted to them, the principal holders of Parent's
securities and any material interest of such persons in transactions with
Parent is required to be described in proxy statements distributed to Parent's
shareholders and filed with the Commission. Such reports, proxy statements and
other information may be inspected and copies may be obtained from the offices
of the Commission in the same manner as set forth with respect to information
concerning the Company in Section 8.
 
                                       20
<PAGE>
 
  Set forth below is a summary of certain consolidated financial information
with respect to Parent and its subsidiaries excerpted or derived from the
information contained in Parent's Annual Report on Form 10-K for the year ended
December 31, 1994 ("Parent's 1994 10-K"), Parent's Quarterly Report on Form 10-
Q for the quarter ended June 30, 1995 ("Parent's Second Quarter 10-Q") and from
certain other financial information regarding Parent. More comprehensive
financial information is included in the complete financial statements of
Parent contained in Parent's 1994 10-K and Parent's Second Quarter 10-Q on file
with the Commission, and such financial statements are incorporated herein by
reference.
 
                              DANAHER CORPORATION
 
                         SELECTED FINANCIAL INFORMATION
                    (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
 
<TABLE>
<CAPTION>
                         6 MONTHS ENDED JUNE 30,      FISCAL YEAR ENDED DEC. 31,
                         -------------------------  -------------------------------
                             1995         1994
                         (UNAUDITED)   (UNAUDITED)     1994        1993      1992
                         ------------  -----------  ----------  ---------- --------
<S>                      <C>           <C>          <C>         <C>        <C>
INCOME STATEMENT DATA
  Net Revenues.......... $    767,996   $  607,235  $1,288,684  $1,075,529 $955,518
  Income before change
   in accounting
   principle (1)........       49,068       33,794      81,650      53,749   31,601
  Net Income............       49,068       33,794      81,650      17,749   31,601
EARNINGS PER SHARE:
  Income before change
   in accounting
   principle (1)........ $       0.82   $     0.58  $     1.40  $      .93 $    .55
  Net Income............         0.82         0.58        1.40         .31      .55
BALANCE SHEET DATA (at
 end of period)
  Total Assets.......... $  1,221,294   $  944,831  $1,134,941  $  872,472 $769,815
  Working Capital.......       43,954       72,424      (7,548)     42,398   17,614
  Long-term debt........      116,547      140,946     116,515     131,350  137,305
  Total Shareholders'
   Equity...............      528,685      401,740     476,100     363,666  348,379
</TABLE>
- --------
(1) On January 1, 1993, Parent adopted SFAS No. 106 requiring use of the
    accrual method for post-retirement benefits other than pensions.
 
  Parent, through its wholly owned subsidiary DH Holdings Corp., currently
beneficially owns an aggregate of 613,550 Shares which it acquired on various
dates from May 29, 1994 to October 6, 1994, for an aggregate cash consideration
of $15,122,191.
 
  Except as set forth in this Offer to Purchase, none of the Purchaser
Entities, or, to the best knowledge of any of the Purchaser Entities, any of
the persons listed on Schedule I, has any contract, arrangement, understanding
or relationship with any other person with respect to any securities of the
Company, including, but not limited to, any contract, arrangement,
understanding or relationship concerning the transfer or the voting of any
securities of the Company, joint ventures, loan or option arrangements, puts or
calls, guarantees of loans, guarantees against loss or the giving or
withholding of proxies. Except as set forth in this Offer to Purchase, none of
the Purchaser Entities, or, to the best knowledge of the Purchaser Entities,
any of the persons listed on Schedule I, has had, since January 1, 1992, any
business relationships or transactions with the Company or any of its executive
officers, directors or affiliates that would require reporting under the rules
of the Commission. Except as set forth in this Offer to Purchase, since January
1, 1992, there have been no contacts, negotiations or transactions between the
Purchaser Entities, or their respective subsidiaries, or to the best knowledge
of the Purchaser Entities, any of the persons listed on Schedule I, and the
Company or its affiliates, concerning a merger, consolidation or acquisition,
tender offer or other acquisition of securities, election of directors or a
sale or other transfer of a material amount of assets. Except as set forth in
this Offer
 
                                       21
<PAGE>
 
to Purchase, none of the Purchaser Entities or, to the best knowledge of the
Purchaser Entities, any of the persons listed on Schedule I, beneficially owns
any Shares or has effected any transactions in the Shares in the past 60 days.
 
10. BACKGROUND OF THE OFFER; CONTACTS WITH THE COMPANY
 
  Between May 29, 1994 and August 1, 1994, Parent purchased an aggregate of
204,000 Shares at an average price per Share (excluding mark-ups or
commissions) of $25.57 in open market purchases. On August 2, 1994, Parent
purchased 329,500 Shares at a price per Share (excluding mark-ups or
commissions) of $25.6875. As a result of this purchase, Parent became the
beneficial owner of more than 5 percent of the outstanding shares of the
Company's common stock, requiring Parent to file a Schedule 13D with the
Commission to disclose its holdings in the Company's stock. On August 5, 1994,
Parent purchased an additional 10,000 Shares at a price per Share (excluding
mark-ups or commissions) of $25.8125. On August 12, 1994, Parent filed a
Schedule 13D with the Commission.
 
  On October 6, 1994, Parent purchased an additional 70,000 Shares at a price
per Share (excluding markups and commissions) of $26.
 
  In September, 1994 and March, 1995, Mr. Patrick W. Allender, Senior Vice
President and Chief Financial Officer of Parent, and Mr. George M. Sherman,
President and Chief Executive Officer of Parent, met with Mr. William E.
Bendix, currently Chairman of the Board of the Company, and Mr. Lawrence G.
Wolski, currently Acting Chief Executive Officer of the Company. The purpose of
these meetings was for Parent, as a new large shareholder of the Company, to
introduce itself to the Company's top management and to learn more about the
Company and management's plans for it. In June of 1995, Mr. Allender called Mr.
Wolski to discuss the Company's recent announcement of its planned acquisition
of Cyberex, Inc.
 
  On June 30, 1995, Mr. Sherman called Mr. Bendix to inquire whether the
Company might be receptive to an expression of interest by Parent in a business
transaction between Parent and the Company. Mr. Bendix indicated that the
Company viewed itself as an independent company in the future, but that he
would discuss the issue with the rest of the Board members. On July 6, 1995,
Mr. Bendix called Mr. Sherman and indicated that the Company would always be
agreeable to meet with the Company's large shareholders to discuss the
Company's future and the Company's reported results, but also that its
directors believed in the Company's future as an independent company. Mr.
Sherman, on behalf of Parent, asked for a meeting with the Company's officers
and to be provided access to non-public information concerning the Company upon
execution of a confidentiality agreement with the Company to assist Parent in
evaluating its alternatives with respect to its investment in the Company,
including a possible business combination. On July 7, 1995, Mr. Bendix
responded to Mr. Sherman's request by indicating that the request would be
considered by the Company's Board of Directors at its next meeting scheduled
for July 19, 1995.
 
  On July 7, 1995, Mr. Sherman telephoned Mr. Bendix to inform him that Parent
was interested in pursuing a business combination with the Company. In
addition, Mr. Sherman read and telecopied the following letter to Mr. Bendix.
 
                                       22
<PAGE>
 
                                                                  July 7, 1995
 
Mr. William E. Bendix
Chairman of the Board
Joslyn Corporation
30 South Wacker Drive
Chicago, IL 60606
 
Dear Bill:
 
  As you know, Danaher Corporation has been an investor in Joslyn Corporation
for over a year. We have been impressed with Joslyn's business, which
complements businesses we are engaged in.
 
  When we spoke initially on June 30, 1995 and most recently on July 6 and 7,
1995, I told you that Danaher's management was reviewing what the alternatives
might be with respect to our investment in Joslyn, and might consider
discussing with Danaher's Board of Directors whether to explore a business
combination with Joslyn. Danaher's management and Board of Directors has now
decided to propose a business combination, and we hereby propose a combination
of our companies' businesses in a transaction in which your stockholders would
receive cash for each share of their common stock. Based on our review of
publicly available information about Joslyn, we propose a price of $32 per
share. We think the offer is the appropriate price based on publicly available
information, but we would like to conduct a brief, highly focused due diligence
investigation in order to explore whether a higher price could be justified.
 
  We believe that the transaction we are proposing represents a very attractive
opportunity for your stockholders. The price we are offering represents a
significant premium over today's closing market price of the Company's common
stock--a price that, in our view, already reflects the fact that Danaher is a
substantial owner of Joslyn's shares.
 
  Our offer is not subject to financing, but is subject to the taking of all
necessary actions to eliminate the applicability of, or to satisfy, any anti-
takeover or other defensive provisions contained in the applicable corporate
statutes or in the Company's charter, by-laws and rights agreement.
 
  We are convinced that the combination of our companies will be of great
benefit to Joslyn and its stockholders. We also believe that Joslyn's
employees, customers and suppliers will benefit from the joining of the
complementary strengths of our two companies.
 
  Our financial strength and the complementary nature of the businesses of our
two companies enables us to move forward quickly to negotiate and to close an
agreement. We are prepared to enter into immediate discussions with you and
your directors, management and advisors to answer any questions you may have
about our offer.
 
  We hope that you and your fellow directors will view this offer as we do - -
 an excellent opportunity for the stockholders of the Company to realize full
value for their shares to an extent that is not available to them in the
marketplace.
 
  We trust that Joslyn's Board of Directors will give our offer prompt and
serious consideration and will not take any actions that would adversely affect
your stockholders' ability to receive the benefits of our proposed transaction.
 
  Our sincere desire is to work together with you to reach agreement on a
negotiated transaction which can be presented to your stockholders as the joint
effort of the directors and managements of both companies.
 
                                       23
<PAGE>
 
  As you can appreciate, it is important that we hear from you as promptly as
practicable with respect to our offer. We look forward to hearing from you and
to working together on this transaction.
 
                                          Sincerely,
 
                                          George M. Sherman
 
  On July 10, 1995, Mr. Bendix and Mr. Wolski telecopied the following letter
to Mr. Sherman.
 
                                                                   July 10, 1995
 
Mr. George M. Sherman
President and Chief Executive Officer
Danaher Corporation
1250 24th Street, N.W.--Suite 800
Washington, D.C. 20037
 
Dear George:
 
  We have received your letter dated July 7, 1995 and have forwarded it to our
board. Your proposal will be considered at our regularly scheduled meeting on
July 19, 1995. Promptly after that meeting, we will either inform you of our
board's response or give you an estimated date for such response.
 
  As you know, we have recently reconstituted our board. It is now comprised of
a majority of independent directors and led by a non-executive chairman. We
would not presume to pre-empt or predict their decision. It is not
presumptuous, however, to offer the following observations:
 
  . In considering your proposal, the board will be weighing it against the
   excellent prospects of the Company on an independent, stand-alone basis as
   we begin to see the benefits of new programs which are now being
   implemented. Anticipated strong second quarter results and the Cyberex
   acquisition are but two examples.
 
  . Even if the board were to determine to abandon the Company's independent
   status and pursue a business combination, it would first select between a
   strategic merger and, as you have proposed, a change-in-control
   transaction. The next decision would be how to pursue such a transaction.
   In the absence of an unquestionably pre-emptive offer from Danaher, an
   exclusive negotiation over a change-in control transaction is not likely
   to occur because of the fiduciary duties of our directors.
 
  . The guiding principle for our directors will be the best interests of our
   stockholders. If they determine to pursue a transaction, the Company will
   do so vigorously. If they determine to continue down our independent path,
   the Company will pursue all appropriate defenses.
 
  Our board will give your proposal a thorough, careful and good faith review
on the 19th. We will respond to you shortly after that meeting.
 
                                          Sincerely,
 
                                          William E. Bendix
 
                                          L.G. Wolski
 
cc: Board of Directors of Joslyn Corporation
 
 
                                       24
<PAGE>
 
  On July 19, 1995, Mr. Bendix and Mr. Wolski telecopied the following letter
to Mr. Sherman.
 
                                                                   July 19, 1995
 
Mr. George M. Sherman
President and Chief Executive Officer
Danaher Corporation
1250 24th Street, N.W. - Suite 800
Washington, D.C. 20037
 
Dear George:
 
  As promised, the Board of Directors of Joslyn Corporation and our financial
advisor, Goldman, Sachs & Co., have reviewed your company's proposal to acquire
Joslyn for $32 per share.
 
  The Board has unanimously concluded that entering into merger discussions
with you or providing confidential information to you is not in the best
interests of Joslyn's shareholders. In reaching this conclusion, the Board has
considered, among other things, Joslyn's prospects as an independent company
and the implications of its new growth strategy, its financial analysis and the
analysis presented by Goldman, Sachs & Co. as well as other alternatives
available to Joslyn.
 
                                          Sincerely,
 
                                          William E. Bendix
 
                                          Lawrence G. Wolski
 
cc: Board of Directors of Joslyn Corporation
 
  On July 23, 1995, George M. Sherman, the President and Chief Executive
Officer of Parent, telephoned Mr. Bendix to inform him that the Offer would
commence on July 24. On July 24, 1995, the Purchaser commenced the Offer and
Mr. Sherman called Mr. Wolski, the Acting Chief Executive Officer of the
Company, and summarized Parent's press release as to the commencement of the
Offer and the commencement of the litigation described below. Parent also, on
July 24, telecopied to the Company a copy of Parent's press release and of the
following letter from Mr. Sherman to Mr. Bendix.
 
                                                                   July 24, 1995
 
Mr. William E. Bendix
Chairman of the Board
Joslyn Corporation
30 South Wacker Drive
Chicago, IL 60606
 
Dear Bill:
 
  As you know, Danaher Corporation has expressed to you on several occasions
our interest in entering into a business combination with Joslyn Corporation
(the "Company"). On July 7, 1995, Danaher proposed to you a business
combination transaction in which the Company's shareholders would receive $32
in cash for each share of common stock. In the course of our conversations, we
requested access to non-public information concerning the Company, under an
appropriate confidentiality agreement, so that we could explore whether a
higher price would be justified. By your letter dated July 19, you informed us
that the Company's directors had concluded that entering into merger
discussions with Danaher or providing confidential information to Danaher is
not in the best interests of the Company's shareholders.
 
                                       25
<PAGE>
 
  We are disappointed by the Company's rejection of our proposal to negotiate a
business combination transaction and to our request for access to information.
We fail to see how it could be in the best interests of your shareholders to
reject any further discussion with us.
 
  While we would have preferred to negotiate a transaction with you, we feel
that you have left us no choice but to present a proposal directly to your
shareholders. Accordingly, Danaher and TK Acquisition Corporation, an indirect
wholly-owned subsidiary of Danaher, are today commencing a tender offer for all
of the outstanding shares (and the associated common stock purchase rights) of
the Company at a price of $32 net per share in cash. It is our intention to
acquire any shares not purchased in the tender offer in a subsequent merger for
the same cash consideration paid to shareholders in the tender offer. We would
expect customary conditions for a transaction of this type; however, we have
secured the financing necessary to fund our offer.
 
  We believe that an all cash price of $32 net per share for all shares
presents a very attractive opportunity for the Company's shareholders. For the
past three years, the Company's stock has generally traded in the low or mid-
20s. Our offer represents an approximately 30% premium over the closing price
on the last trading day before our July 7 letter proposing to acquire the
Company at $32 per share.
 
  In light of the attractive terms of our offer, we request that the Company's
Board of Directors make appropriate determinations so that the common stock
purchase rights and the restrictions provided in the Illinois Business
Combination Law are rendered inapplicable to our tender offer and subsequent
merger. We would expect that you will not take any other actions that would be
detrimental to the interests of the shareholders. It is our hope that we can
proceed to complete a transaction with a minimum of delay.
 
                                          Sincerely,
 
                                          George M. Sherman
 
  Also on July 24, 1995, the Purchaser commenced litigation against the Company
in the United States District Court for the Northern District of Illinois
seeking, among other things, a preliminary injunction (i) enjoining the
operation of the provisions of the Rights Agreement purporting to require
approval by the Continuing Directors for redeeming the Rights or taking certain
actions with respect to the Rights and the Rights Agreement and (ii) enjoining
the Company's Board of Directors from treating the tender of shares to
Purchaser prior to its acceptance of such shares for purchase, the receipt of
authorizations for the calling of a special meeting, and the obtaining of
revocable proxies or consents to vote shares as vesting beneficial ownership of
such shares in Purchaser for purposes of Section 7.85. In addition, Purchaser's
lawsuit seeks, among other things, to prohibit the Board of Directors of the
Company from breaching their fiduciary duties to the Company and its
shareholders, through issuance of an order (i) compelling the Board of
Directors of the Company to redeem the Rights or to make the Rights
inapplicable to the Offer and the Proposed Merger; (ii) enjoining the Board of
Directors of the Company from using Illinois' business combination statutes to
interfere with or prevent Purchaser's Offer and Proposed Merger; (iii)
compelling the Board of Directors of the Company to approve the Offer and the
Proposed Merger for purposes of the Business Combination Law; (iv) declaring
that no state laws other than those of Illinois that purport to regulate
business combinations of the Company apply to Purchaser's Offer and Proposed
Merger; (v) enjoining the Company from instituting proceedings in any other
court or forum concerning or related to Purchaser's Offer and Proposed Merger
and (vi) enjoining the Board of Directors of the Company from taking any other
steps to interfere with or prevent Purchaser's Offer and Proposed Merger.
 
  Except as described in this Offer to Purchase (including Schedule I hereto),
none of the Purchaser, Parent or, to the best knowledge of the Purchaser, any
of the persons listed in Schedule I hereto, or any associate or majority owned
subsidiary of the Purchaser, Parent or any of the persons so listed,
beneficially owns any equity security of the Company, and none of the
Purchaser, Parent or, to the best knowledge of the Purchaser,
 
                                       26
<PAGE>
 
any of the other persons referred to above, or any of the respective directors,
executive officers or subsidiaries of any of the foregoing, has effected any
transaction in any equity security of the Company during the past 60 days. The
Purchaser and Parent disclaim beneficial ownership of any Shares owned by any
pension plan of Parent or any affiliate thereof.
 
  Except as described in this Offer to Purchase, as of the date hereof, (a)
there have not been any contracts, transactions or negotiations between the
Purchaser or Parent, any of their respective subsidiaries or, to the best
knowledge of the Purchaser, any of the persons listed in Schedule I hereto, on
the one hand, and the Company or any of its directors, officers or affiliates,
on the other hand, that are required to be disclosed pursuant to the rules and
regulations of the Commission, and (b) none of the Purchaser, Parent or, to the
best knowledge of the Purchaser, any of the persons listed in Schedule I hereto
has any contract, arrangement, understanding or relationship with any person
with respect to any securities of the Company. During the Offer, the Purchaser
and Parent intend to have ongoing contacts and negotiations with the Company
and its directors, officers and shareholders.
 
  Parent filed on July 24, 1995 with the FTC and the Antitrust Division a
Premerger Notification and Report Form under the HSR Act with respect to the
Offer. Accordingly, the waiting period under the HSR Act applicable to the
Offer will expire at 11:59 P.M., New York City time, on August 8, 1995, unless
prior to the expiration or termination of the waiting period, the FTC or the
Antitrust Division extends the waiting period by requesting additional
information from the Parent. If such a request is made, the waiting period
applicable to the Offer will expire on the tenth calendar day after the date of
substantial compliance by the Parent with such request. Thereafter, the waiting
period may only be extended by court order.
 
11. PURPOSE OF THE OFFER; PLANS FOR THE COMPANY
 
 Purpose of the Offer
 
  The purpose of the Offer and the Proposed Merger is to acquire control of,
and the entire equity interest in, the Company. The Purchaser currently
intends, as soon as practicable following completion of the Offer, to propose
and seek to have the Company consummate the Proposed Merger. The purpose of the
Proposed Merger is to acquire all Shares not tendered and purchased pursuant to
the Offer or otherwise. Pursuant to the Proposed Merger, each then outstanding
Share (other than Shares owned by Parent or any of its wholly owned
subsidiaries, Shares held in the treasury of the Company, and Shares held by
shareholders who perfect appraisal rights under the Illinois Law) would be
converted into the right to receive cash in the same amount as received per
Share in the Offer, and the Company would become an indirect wholly owned
subsidiary of Parent.
 
  Although the Purchaser will seek to have the Company consummate the Proposed
Merger as soon as practicable after consummation of the Offer, if the Board of
Directors of the Company opposes the Offer and the Proposed Merger, certain
terms of the Rights, the Illinois Law, the Company's Certificate and the
Company's Bylaws may affect the ability of the Purchaser to consummate the
Offer, to obtain control of the Company and to effect the Proposed Merger.
Accordingly, the timing of the consummation of the Offer and the Proposed
Merger will depend on a variety of factors and legal requirements, the actions
of the Board of Directors of the Company, the number of Shares (if any)
acquired by the Purchaser pursuant to the Offer, and whether the Minimum
Condition, the Rights Condition and the Business Combination Condition are
satisfied or waived.
 
  Parent intends to continue to seek to negotiate with the Company with respect
to its acquisition proposal. The Purchaser reserves the right to amend or
terminate the Offer (including, without limitation, amending the purchase
price) if such negotiations result in an agreement with the Company for the
acquisition of the Company. See Section 14. Parent and the Purchaser reserve
the right to acquire additional Shares following expiration of the Offer in
open market purchases, through a tender offer, in privately negotiated
transactions or otherwise.
 
                                       27
<PAGE>
 
  THIS OFFER TO PURCHASE DOES NOT CONSTITUTE A SOLICITATION OF A PROXY, CONSENT
OR AUTHORIZATION FOR OR WITH RESPECT TO ANY SPECIAL MEETING OR OTHER MEETING OF
THE COMPANY'S SHAREHOLDERS OR ANY ACTION IN LIEU THEREOF. ANY SUCH SOLICITATION
WHICH PARENT OR THE PURCHASER MAY MAKE, WILL BE MADE ONLY PURSUANT TO SEPARATE
PROXY SOLICITATION MATERIALS COMPLYING WITH ALL APPLICABLE REQUIREMENTS OF
SECTION 14(A) OF THE EXCHANGE ACT, AND THE RULES AND REGULATIONS PROMULGATED
THEREUNDER.
 
 Plans for the Company
 
  Parent does not have any current plans to dispose of any businesses or other
assets of the Company or to effect any changes in its operations. If Parent
acquires control of the Company, it intends to conduct a further review of the
Company and its subsidiaries and their respective assets, businesses, corporate
structure, capitalization, operations, properties, policies, management and
personnel and to integrate the Company's principal subsidiaries into Parent's
Process/Environmental Controls Group. After such review, it is possible that
Parent might modify its current plans not to dispose of any businesses or other
assets of the Company and not to effect any changes in the Company's operations
other than as described above.
 
  The exact timing and details of the Proposed Merger will necessarily depend
upon a variety of factors. Although the Purchaser currently intends to propose
the Proposed Merger generally on the terms described in this Offer to Purchase,
it is possible that as a result of substantial delays in the Purchaser's
ability to effect such a transaction, information hereafter obtained by Parent
or the Purchaser, the terms of existing debt of the Company, changes in general
economic or market conditions or in the business of the Company or other
currently unforeseen factors, such a transaction may not be so proposed, may be
delayed or abandoned or may be proposed on different terms. In addition, if the
Rights Condition or the Business Combination Condition is not satisfied and the
Purchaser waives any such condition and consummates the Offer (which it is not
obligated to do), it may be impossible or impractical to consummate the
Proposed Merger, at least for a significant period of time. Accordingly, the
Purchaser expressly reserves the right not to propose the Proposed Merger or to
propose such a business combination on terms other than those described in this
Offer to Purchase. Specifically, but without limitation, the Purchaser reserves
the right to propose consideration in a merger or other business combination
consisting of securities or other consideration different from those described
in this Offer to Purchase and having a value more or less than the
consideration described in this Offer to Purchase.
 
  Except as described in this Offer to Purchase, neither Parent nor the
Purchaser has any current plans or proposals that would relate to or would
result in (i) an extraordinary corporate transaction, such as a merger,
reorganization or liquidation, involving the Company or any of its
subsidiaries, (ii) a sale or transfer of a material amount of assets of the
Company or any of its subsidiaries, (iii) any change in the present Board of
Directors or management of the Company, (iv) any material changes in the
present capitalization or dividend policy of the Company, (v) any other
material change in the Company's corporate structure or business, (vi) causing
a class of securities of the Company to be delisted from a national securities
exchange or to cease to be authorized to be quoted in an inter-dealer quotation
system of a registered national securities association or (vii) a class of
equity securities of the Company becoming eligible for termination of
registration pursuant to Section 12(g)(4) of the Exchange Act.
 
  If the Offer is consummated as contemplated, the Purchaser will hold a
majority of the Shares outstanding and will therefore hold sufficient Shares to
approve the Proposed Merger. However, in light of the restrictions described
below, there can be no assurance that the Proposed Merger will be proposed to
shareholders of the Company or be consummated or as to the timing thereof.
Nonetheless, if the Board of Directors of the Company redeems (or otherwise
makes inapplicable) the Rights and approves the Offer and the Proposed Merger
for purposes of the Business Combination Law, the Rights Condition and the
Business Combination Condition would be satisfied.
 
  Neither Parent nor the Purchaser can give any assurance as to whether, as a
result of information hereafter obtained by either Parent or the Purchaser,
changes in general economic or market conditions or in
 
                                       28
<PAGE>
 
the business of the Company, or other presently unforeseen factors, the
Proposed Merger will be submitted to the Company's shareholders or whether the
Proposed Merger will be delayed or abandoned. Whether or not the Proposed
Merger is consummated, Parent and the Purchaser reserve the right to acquire
additional Shares following the expiration of the Offer through private
purchases, market transactions, tender or exchange offers or otherwise on terms
and at prices that may be more or less favorable than those of the Offer or,
subject to any applicable legal restrictions, to dispose of any or all Shares
acquired by Parent and the Purchaser.
 
 Statutory Requirements
 
  Board Approval; Shareholder Approval. Under the Illinois Law, except in the
case of a short-form merger as described below, the Proposed Merger would
require the approval of a majority of the members of the Company's Board of
Directors prior to its submission to a vote of shareholders. However, the
Company's By-Laws require the approval of 75% of the Board members for such a
merger.
 
  In addition, Illinois Law requires the approval of the agreement of merger by
the shareholders of the acquired corporation by the affirmative vote of the
holders of at least two-thirds of the outstanding shares entitled to vote,
except in the case of a short-form merger as described below. According to the
Company's Certificate, the Shares are the only securities of the Company
entitling the holders thereof to voting rights. Assuming that the Offer is
consummated and that the Minimum Condition and the other conditions to the
Offer are satisfied, the Purchaser will hold at least two-thirds of the Shares
outstanding and will therefore hold sufficient Shares to ensure shareholder
approval of the Proposed Merger.
 
  Illinois Law also provides that if a parent company owns at least 90% of the
outstanding shares of each class of shares of a subsidiary, the parent company
can effect a short-form merger with that subsidiary without the action of the
Subsidiary's Board of Directors or the other shareholders of the subsidiary.
Accordingly, if, as a result of the Offer or otherwise, the Purchaser acquires
or controls the voting power of at least 90% of the Shares, the Purchaser could
effect the Proposed Merger without prior notice to, or any action by, the
Company's Board of Directors or any other shareholder of the Company.
 
  The Purchaser intends to take such action as may be necessary and lawful to
secure control of the Board of Directors of the Company following the
consummation of the Offer. In this connection, in the event that after the
Minimum Condition is satisfied and the Offer is consummated, the Purchaser will
control sufficient votes to replace the entire Board of Directors of the
Company. In the event the Purchaser obtains control of the Company's Board of
Directors, the Purchaser would expect to seek approval of the Proposed Merger
as soon as practicable thereafter, consistent with the fiduciary obligations of
the Board.
 
  As noted in the Introduction, in order to increase the likelihood that the
Company and the Purchaser enter into the Proposed Merger, Parent and the
Purchaser intend to commence a solicitation of appointments of Parent and the
Purchaser as designated agents for the purpose of calling the Special Meeting
at which, among other things, Parent and the Purchaser would propose that the
holders of Shares (i) remove all of the incumbent directors of the Company,
(ii) amend the Company's By-Laws to fix the number of directors of the Company
at three and (iii) elect the nominees of the Purchaser to serve as the
directors of the Company. The nominees of the Purchaser, if elected at the
Special Meeting, intend, among other things, and subject to fulfillment of the
fiduciary duties that they would have as directors of the Company, to approve
the Offer and the Proposed Merger under sections 7.85 and 11.75 of the Illinois
Law.
 
  THE OFFER IS CONDITIONED ON THE MINIMUM CONDITION BEING SATISFIED.
 
  Illinois Business Combination Law. The Proposed Merger, including, without
limitation, the timing and details thereof, is subject to, among other things,
the provisions of the Illinois Law, including, without limitation, the Business
Combination Law. The terms of the two relevant Sections of the Business
Combination Law are as follows:
 
                                       29
<PAGE>
 
SECTION 7.85
 
  Section 7.85 of the Illinois Law provides that an Illinois corporation, such
as the Company, may not engage in any "Business Combination" (defined to
include a variety of transactions, including, without limitation, a merger)
with any "Interested Shareholder" (defined for purposes of Section 7.85 as a
person that directly or indirectly beneficially owns 10% or more of the
corporation's outstanding voting stock), or any affiliate of an Interested
Shareholder, at any time unless (i) either before or after the date such
Interested Shareholder became an Interested Shareholder, two-thirds of the
"Disinterested Directors" of such corporation ("Disinterested Director" being
defined as a director who is (a) not an Interested Shareholder or an associate
or affiliate thereof; (b) was a director at the time that the Interested
Shareholder became an Interested Shareholder, or was recommended to the Board
by a majority of Disinterested Directors, and (c) was not nominated for
election as a director by an Interested Shareholder or an associate or
affiliate thereof) approved the Business Combination, (ii) the Business
Combination is approved by the holders of at least (a) 80% of the outstanding
voting stock of the corporation and (b) a majority of the combined voting power
of the corporation's voting stock which is not owned by the Interested
Shareholder or its affiliates or associates, or (iii) the Business Combination
meets certain "fair price" and "fair process" requirements, including the
following:
 
    (a) the corporation's shareholders will receive consideration (in cash or
  the form principally used by the Interested Shareholder to acquire its
  position), in exchange for the common shares of the corporation held by
  them, which is at least equal to the greater of (x) the highest per share
  price paid by the Interested Shareholder or any of its affiliates or
  associates for the corporation's shares during the two years prior to first
  public announcement of the proposal of the Business Combination (the
  "Announcement Date") or in the transaction in which the person became an
  Interested Shareholder, whichever is higher, and (y) the fair market value
  of the corporation's shares on the first trading date after the
  Announcement Date or the date on which it was publicly announced that the
  person had become an Interested Shareholder, whichever is higher;
 
    (b) after the date the person becomes an Interested Shareholder and prior
  to consummation of the Business Combination, there shall have been no
  reduction in the annual rate of dividends paid on the corporation's common
  shares (unless approved by two-thirds of the Disinterested Directors) and
  the Interested Shareholder shall not have acquired additional voting shares
  (except as part of the transaction which resulted in its becoming an
  Interested Shareholder) or received the benefit, directly or indirectly
  (except proportionately as a shareholder), of any loans, advances,
  guarantees, pledges or other financial assistance or any tax credits or
  other tax advantages provided by the Corporation; and
 
    (c) a proxy or information statement describing the Business Combination
  must be mailed to public shareholders of the corporation at least 30 days
  prior to the consummation of the Business Combination.
 
SECTION 11.75
 
  Section 11.75 of the Illinois Law provides that an Illinois corporation, such
as the Company, may not engage in any Business Combination with any "Interested
Shareholder" (defined for purposes of Section 11.75 as a person that directly
or indirectly, by itself or with or through any of the affiliates or
associates, beneficially owns 15% or more of the corporation's outstanding
voting stock) for three years after the date on which the Interested
Shareholder becomes an Interested Shareholder, unless (i) prior to the date
such Interested Shareholder became an Interested Shareholder, the board of
directors of such corporation approved either the Business Combination or the
transaction which resulted in the shareholder becoming an Interested
Shareholder, (ii) upon consummation of the transaction which resulted in the
shareholder becoming an Interested Shareholder, the Interested Shareholder
owned at least 85% of the voting stock of the corporation outstanding at the
time the transaction commenced (excluding, for purposes of determining the
number of shares outstanding, those shares held by (A) persons who are
directors and also officers of the corporation and (B) employee stock plans in
which employee participants do not have the right to determine confidentially
whether shares held subject to the plan will be tendered in a tender or
exchange offer) or (iii) on or subsequent
 
                                       30
<PAGE>
 
to the date the shareholder becomes an Interested Shareholder, the Business
Combination is (a) approved by the board of directors of the corporation and
(b) authorized at an annual or special meeting of shareholders by the
affirmative vote of the holders of at least 66% of the outstanding voting stock
of the Corporation which is not owned by the Interested Shareholder.
 
  The foregoing summary of the Business Combination Law does not purport to be
complete and is qualified in its entirety by reference to the provisions of the
Business Combination Law.
 
  THE OFFER IS CONDITIONED ON THE BUSINESS COMBINATION CONDITION BEING
SATISFIED.
 
 The Rights
 
  The following description is based upon the Company's 8-A/A. All statements
with respect to the Rights (as defined in the Introduction) and the Rights
Agreement (as defined in the Introduction) are based solely upon the
description of such Rights in the Company's 8-A/A. Although each of Parent and
the Purchaser has no knowledge that any such information is untrue, neither
Parent nor the Purchaser takes any responsibility for the accuracy or
completeness of the information contained in the Company's 8-A/A, or for any
failure by the Company to disclose events that may have occurred and may affect
the significance or accuracy of any such information but which are unknown to
Parent and the Purchaser. The summary of the Rights and Rights Agreement
contained in this Offer to Purchase does not purport to be complete, and is
qualified in its entirety by reference to the Company's 8-A/A and the exhibits
thereto.
 
  On February 10, 1988, the Board of Directors of the Company declared a
dividend distribution of one Right for each outstanding Share, to shareholders
of record at the close of business on March 4, 1988, pursuant to the Rights
Agreement. On September 2, 1994, the Rights Agreement was amended in certain
respects. The discussion of the Rights that follows reflects the amendments to
the Rights Agreement as originally adopted. Each Right entitles the registered
holder to purchase from the Company one Share, at a purchase price of $60.00,
subject to adjustment in certain circumstances (the "Purchase Price"), to be
paid in cash. The description and terms of the Rights are set forth in the
Rights Agreement.
 
  Initially, the Rights were attached to the certificates representing
outstanding Shares, and no separate Rights Certificates were distributed. The
Rights will separate from the Shares and a "Distribution Date" will occur upon
the earlier of (i) ten (10) days following a public announcement that a person
(an "Acquiring Person") (other than the Company, any subsidiary of the Company
or any employee benefit plan of the Company or of any subsidiary of the
Company), alone or together with affiliates and associates, has become the
beneficial owner of 15% or more of the outstanding Shares or (ii) ten (10)
business days (or such later date as may be determined by action of the
Company's Board of Directors prior to such time as any person becomes an
Acquiring Person) following the commencement of a tender offer or exchange
offer the consummation of which would result in the beneficial ownership by a
person or group (other than the Company, any subsidiary of the Company or any
employee benefit plan of the Company or of any subsidiary of the Company) of
15% or more of the outstanding Shares. The first date of public announcement
that an Acquiring Person has become such is referred to herein as the "Stock
Acquisition Date". Certain inadvertent acquisitions will not result in a
person's becoming an Acquiring Person if the person promptly divests itself of
sufficient Shares. Until the Distribution Date, (a) the Rights will be
evidenced by the Share certificates and will be transferred with and only with
such Share certificates, (b) new Share certificates issued after March 4, 1988
will contain a legend incorporating the Rights Agreement by reference and (c)
the surrender for transfer of any certificate for Shares will also constitute
the transfer of the Rights associated with the Shares represented by such
certificate.
 
  The Rights are not exercisable until the Distribution Date and will expire at
the close of business on March 3, 1998, unless earlier redeemed by the Company
as described below.
 
  As soon as practicable after the Distribution Date, Rights Certificates are
to be mailed to holders of record of Shares as of the close of business on the
Distribution Date and, thereafter, such separate Rights
 
                                       31
<PAGE>
 
Certificates alone will represent the Rights. All Shares issued prior to the
Distribution Date are to be issued with Rights. Shares issued after the
Distribution Date will be issued with Rights if such Shares are issued pursuant
to the exercise of stock options or under an employee benefit plan, or upon
conversion of securities issued after the adoption of the Rights Agreement.
Except as otherwise determined by the Board of Directors, no other Shares
issued after the Distribution Date will be issued with Rights.
 
  In the event (a "Flip-In Event") that a person becomes an Acquiring Person
(unless pursuant to a transaction described in the immediately succeeding
paragraph), each holder of a Right will thereafter have the right to receive,
upon exercise of such Right, the then number of Shares for which a Right is
exercisable upon the date on which a person has become an Acquiring Person at
an adjusted purchase price per share equal to the greater of (i) 20% of the
then current market price per share on the date on which a person became an
Acquiring Person and (ii) the par value per Share. Notwithstanding the
foregoing, following the occurrence of any Flip-In Event, all Rights held by
any Acquiring Person (and its associates, affiliates and certain transferees)
will be null and void. For example, assume that each Right not owned by an
Acquiring Person (or its associates, affiliates and certain transferees) on the
date of the Flip-In Event would entitle its holder to receive, upon exercise,
one Share. If the then current market price per Share is $25, the holder of
each valid Right would be entitled to purchase one Share for $5; i.e. at 20% of
the then current market price. However, Rights are not exercisable following
the occurrence of any Flip-In Event until such time as the Rights are no longer
redeemable by the Company as set forth below.
 
  In the event (a "Flip-Over Event") that following the Stock Acquisition Date,
(i) the Company is acquired in a share exchange or in a merger or consolidation
in which the Company is not the surviving corporation or in which all or part
of the outstanding Shares is changed into or exchanged for securities of any
other person, cash or any other property or (ii) more than 50% of the Company's
consolidated assets or earning power is sold or transferred to any person
(other than the Company, any subsidiary of the Company or any employee benefit
plan of the Company or of any subsidiary of the Company), each holder of a
Right (except Rights that previously have been voided as set forth above) shall
thereafter have the right to receive, upon exercise of the Right, such number
of shares of common stock of the acquiring company as shall have a value equal
to two times the exercise price of the Right. For this purpose, the exercise
price of the Right is the Purchase Price multiplied by the number of Shares
issuable upon exercise of a Right prior to the first occurrence of any Flip-
Over Event (initially one). For example, assume that each Right not owned by
the Acquiring Person (or its associates, affiliates and certain transferees)
immediately prior to a Flip-Over Event would entitle its holder to receive,
upon exercise, one Share at a Purchase Price of $60. If the then current market
price per share of the Acquiring Person's common stock is $60, the holder of
each valid Right would be entitled to receive two shares of the Acquiring
Person's common stock for $60, i.e. at a 50% discount.
 
  The Purchase Price payable, and the number of Shares or other securities
issuable, upon exercise of the Rights are subject to adjustment from time to
time (i) in the event of a stock dividend on, or a subdivision, combination or
reclassification of, the Shares, (ii) in the event of certain business
combinations prior to a Stock Acquisition Date, (iii) if holders of the Shares
are granted certain rights or warrants to subscribe for Shares or securities
convertible into Shares at less than the then current market price of the
Shares, or (iv) upon the distribution to holders of the Shares of evidences of
indebtedness or assets (excluding regular quarterly cash dividends) or of
subscription rights or warrants (other than those referred to above).
 
  With certain exceptions, no adjustment in the Purchase Price will be required
until cumulative adjustments amount to at least 1% of the Purchase Price. No
fractional shares of Shares will be issued upon exercise of the Rights and, in
lieu thereof, a cash payment will be made based on the market price of the
Shares on the last trading date prior to the date of exercise.
 
  At any time until fifteen days following the Stock Acquisition Date, the
Company may redeem the Rights in whole, but not in part, at a price of $0.03333
per Right, subject to adjustment (the "Redemption Price"), payable, at the
election of the Company, in cash or Shares. Under certain circumstances set
forth in the Rights
 
                                       32
<PAGE>
 
Agreement, the decision to redeem shall require the concurrence of a majority
of the Continuing Directors. After the redemption period has expired, the
Company's right of redemption may be reinstated if each Acquiring Person
reduces his beneficial ownership to 10% or less of the Shares in a transaction
or series of transactions not involving the Company. Immediately upon the
action of the Board of Directors ordering redemption of the Rights, with, where
required, the concurrence of the Continuing Directors, the Rights will
terminate and the only right of the holders of Rights will be to receive the
Redemption Price.
 
  The term "Continuing Director" means any member of the Board of Directors of
the Company who was a member of the Board prior to the date of the Rights
Agreement, and any person who is subsequently elected to the Board if such
person is recommended or approved by a majority of the Continuing Directors,
but shall not include an Acquiring Person, any affiliate or associate of an
Acquiring Person, or any representative of the foregoing entities.
 
  Until a Right is exercised, the holder thereof, as such, will have no rights
as a shareholder of the Company, including, without limitation, the right to
vote or to receive dividends. While the distribution of the Rights will not be
taxable to shareholders or to the Company, shareholders may, depending upon the
circumstances, recognize taxable income in the event that the Rights become
exercisable for Shares (or other consideration) of the Company or for common
stock of an acquiring company as set forth above.
 
  Any of the provisions of the Rights Agreement, other than the provisions
relating to the principal economic terms of the Rights, may be amended by the
Board of Directors of the Company prior to the Distribution Date. After the
Distribution Date, the provisions of the Rights Agreement may be amended by the
Board of Directors to cure any ambiguity, defect or inconsistency, to make
changes which do not adversely affect the interests of holders of Rights
(excluding the interests of any Acquiring Person), or to shorten or lengthen
any time period under the Rights Agreement (under certain circumstances, with
the concurrence of the Continuing Directors); provided that no amendment to
adjust the time period governing redemption shall be made at such time as the
Rights are not redeemable.
 
  The foregoing summary of the Rights Agreement does not purport to be complete
and is qualified in its entirety by reference to the Company's 8-A/A and the
text of the Rights Agreement as set forth as an exhibit thereto, filed with the
Commission, copies of which may be obtained in the manner set forth in Section
8.
 
  If the Rights Condition is not satisfied and the Purchaser elects, in its
sole discretion, to waive the Rights Condition and consummate the Offer, and if
there are outstanding Rights which have not been acquired by the Purchaser, the
Purchaser will evaluate its alternatives. Such alternatives could include
purchasing additional Rights in the open market, in privately negotiated
transactions, in another tender or exchange offer or otherwise. Any such
additional purchase of Rights could be for cash or other consideration. Under
such circumstances, the Proposed Merger might be delayed or abandoned as
impracticable. The form and amount of consideration to be received by the
holders of Shares in the Proposed Merger, if consummated, might be subject to
adjustment to compensate the Purchaser for, among other things, the costs of
acquiring Rights and a portion of the potential dilution cost to the Purchaser
of Rights not owned by the Purchaser and its wholly owned subsidiaries at the
time of the Proposed Merger. In such event, the consideration paid for Shares
in the Proposed Merger could be substantially less than the consideration paid
in the Offer. In addition, the Purchaser may elect under such circumstances not
to consummate the Proposed Merger.
 
  UNLESS AND UNTIL THE PURCHASER DECLARES THAT THE RIGHTS CONDITION IS
SATISFIED, SHAREHOLDERS WILL BE REQUIRED TO TENDER ONE ASSOCIATED RIGHT FOR
EACH SHARE TENDERED IN ORDER TO EFFECT A VALID TENDER OF SUCH SHARE. IF THE
DISTRIBUTION DATE DOES NOT OCCUR PRIOR TO THE EXPIRATION DATE, A TENDER OF
SHARES WILL ALSO CONSTITUTE A TENDER OF THE ASSOCIATED RIGHTS. SEE SECTIONS 1
AND 3.
 
  THE OFFER IS CONDITIONED UPON THE RIGHTS CONDITION BEING SATISFIED.
 
 Appraisal Rights
 
  No appraisal rights are available in connection with the Offer. However, if
the Proposed Merger is consummated, shareholders of the Company will have
certain rights under Section 11.65 of the Illinois Law
 
                                       33
<PAGE>
 
to dissent and demand appraisal of, and payment in cash of the fair value of,
their Shares. Such rights, if the statutory procedures were complied with,
could lead to a judicial determination of the fair value required to be paid in
cash to such dissenting holders for their Shares, plus any accrued interest.
Any such judicial determination of the fair value of Shares and interest could
be based upon considerations other than, or in addition to, the price paid in
the Offer and the market value of the Shares, including, without limitation,
asset values and the investment value of the Shares. The value so determined
could be more or less than the purchase price per Share pursuant to the Offer
or the consideration per Share to be paid in the Proposed Merger.
 
  In addition, although the Illinois courts have not addressed this issue
directly, several decisions by Delaware courts have held that, in certain
instances, a controlling shareholder of a corporation involved in a merger has
a fiduciary duty to the other shareholders that requires the merger to be fair
to such other shareholders. In determining whether a merger is fair to minority
shareholders, the Delaware courts have considered, among other things, the type
and amount of consideration to be received by the shareholders and whether
there were fair dealings among the parties. Although the remedies of rescission
or other damages are possible in an action challenging a merger as a breach of
fiduciary duty, decisions of the Delaware courts have indicated that in most
cases the remedy available in a merger that is found not to be "fair" to
minority shareholders is a damages remedy based on essentially the same
principles as an appraisal. While there can be no assurance that Illinois
courts would come to the same decision, many states follow the lead of the
Delaware courts in corporate matters.
 
  THE FOREGOING SUMMARY OF THE RIGHTS OF OBJECTING SHAREHOLDERS DOES NOT
PURPORT TO BE A COMPLETE STATEMENT OF THE PROCEDURES TO BE FOLLOWED BY
SHAREHOLDERS DESIRING TO EXERCISE ANY AVAILABLE DISSENTERS' RIGHTS. THE
PRESERVATION AND EXERCISE OF DISSENTERS' RIGHTS REQUIRE STRICT ADHERENCE TO THE
APPLICABLE PROVISIONS OF THE ILLINOIS LAW.
 
 "Going Private" Transactions
 
  The Commission has adopted Rule 13e-3 under the Exchange Act which is
applicable to certain "going private" transactions and which may under certain
circumstances be applicable to the Proposed Merger. However, Rule 13e-3 would
be inapplicable if (i) the Shares are deregistered under the Exchange Act prior
to the Proposed Merger or other business combination or (ii) the Proposed
Merger or other business combination is consummated within one year after the
purchase of the Shares pursuant to the Offer and the amount paid per Share in
the Proposed Merger or other business combination is at least equal to the
amount paid per Share in the Offer. If applicable, Rule 13e-3 requires, among
other things, that certain financial information concerning the fairness of the
proposed transaction and the consideration offered to minority shareholders in
such transaction be filed with the Commission and disclosed to shareholders
prior to the consummation of the transaction. The purchase of a substantial
number of Shares pursuant to the Offer may result in the termination of the
Company's registration under the Exchange Act. See Section 7. If such
registration were terminated, Rule 13e-3 would be inapplicable to the Proposed
Merger.
 
12. SOURCE AND AMOUNT OF FUNDS
 
  The total amount of funds required by the Purchaser to purchase all of the
Shares pursuant to the Offer and to pay fees and expenses related to the Offer
and the Proposed Merger is estimated to be approximately $230 million. The
Purchaser plans to obtain all funds needed for the Offer and the Proposed
Merger through a capital contribution from Parent. Parent plans to obtain funds
for such capital contribution through its existing Credit Agreement, dated as
of September 7, 1990, as amended, among Parent and the banks listed therein
(the "Credit Facility"), and through a committed credit line provided by Bank
of America Illinois (the "Committed Line"). The Credit Facility provides for
revolving credit of up to $200 million for general corporate purposes through
August 1, 1997. At present, there is no outstanding indebtedness under the
Credit Facility. Loans under the Credit Facility bear interest at one of the
following rates, as selected by Parent on the date of borrowing: (i) the Base
Rate (as defined in the Credit Facility); (ii) Adjusted CD Rate (as defined
 
                                       34
<PAGE>
 
in the Credit Facility); or (iii), the Eurodollar Rate (as defined in the
Credit Facility) plus, in the case of (ii) and (iii) a margin (ranging from 1/4
of one percent to 3/4 of one percent) based on the leverage ratio of Parent at
the end of the fiscal quarter most recently then ended. As of the date of this
Offer to Purchase, the applicable margin would be 1/4 of one percent, which
margin is expected to increase to 3/8 of one percent based on the pro forma
capitalization of Parent after the Offer and the Proposed Merger. The effective
interest rate as of the date of this Offer to Purchase would be approximately
6.25%. The Credit Facility contains covenants relating to, among other things,
the maintenance of working capital, net worth, debt levels and interest
coverage and restrictions on the payment of dividends. The members of the bank
group providing the Credit Facility are Bankers Trust Company, Bank of America
Illinois, First Chicago Corp., The Chase Manhattan Bank (National Association),
Toronto Dominion Bank, Credit Suisse, Bank of Nova Scotia, Industrial Bank of
Japan, Bank of Tokyo, Chemical Banking Corporation, Credit Lyonnais,
NationsBank Corporation and Dresdner Bank Aktiengesellschaft. The Committed
Line provides for credit of up to $50 million through a date 364 days following
execution of final credit documentation, but in no event later than August 31,
1996, under substantially the same terms and conditions as the Credit Facility.
 
  The foregoing summary of the Credit Facility and the Committed Line is
qualified in its entirety by reference to the text of the Credit Facility,
which was filed as an exhibit to the Purchaser's Tender Offer Statement on
Schedule 14D-1 dated March 22, 1994 and the Committed Line, which was filed as
an exhibit to the Purchaser's Tender Offer Statement on Schedule 14D-1 dated
July 24, 1995.
 
  Although no definitive plan or arrangement for repayment of borrowings under
the Credit Facility and the Committed Line has been made, Parent anticipates
such borrowings will be repaid with internally generated funds (including, if
the Proposed Merger is accomplished, those of the Company) and from other
sources which may include the proceeds of future bank refinancings or the
public or private sale of debt or equity securities. No decision has been made
concerning the method Parent will use to repay the borrowings under the Credit
Facility and the Committed Line. Such decision will be made based on Parent's
review from time to time of the advisability of particular actions, as well as
prevailing interest rates, financial and other economic conditions and such
other factors as Parent may deem appropriate.
 
13. DIVIDENDS AND DISTRIBUTIONS
 
  If, on or after July 21, 1995, the Company (i) splits, combines or otherwise
changes the Shares or its capitalization, (ii) acquires Shares or otherwise
causes a reduction in the number of Shares, (iii) issues or sells additional
Shares (other than the issuance of Shares reserved for issuance as of December
31, 1994 pursuant to the exercise of then outstanding stock options of the
Company or the Company's Stock Plan and Employee Stock Plan in accordance with
their terms as publicly disclosed in the Company's 1994 10-K) or any shares of
any other class of capital stock, other voting securities or any securities
convertible into or exchangeable for, or rights (other than the Rights),
warrants or options, conditional or otherwise, to acquire, any of the foregoing
or (iv) discloses that it has taken any such actions, then, without prejudice
to the Purchaser's rights under Section 14, the Purchaser, in its sole
discretion, may make such adjustments in the purchase price and other terms of
the Offer and the Proposed Merger as it deems appropriate to reflect such
split, combination or other change or action, including, without limitation,
the Minimum Condition or the number or type of securities offered to be
purchased. The Company's regular quarterly cash dividends may be terminated
after the consummation of the Offer.
 
  If on or after July 21, 1995, the Company declares or pays any dividend on
the Shares (other than regular quarterly cash dividends not in excess of $.30
per Share having a customary and usual record date) or any distribution
(including, without limitation, the issuance of additional Shares pursuant to a
stock dividend or stock split, the issuance of other securities or the issuance
of rights (other than the separation of the Rights from the Shares) for the
purchase of any securities) with respect to the Shares or Rights (other than
the redemption price for the Rights) that is payable or distributable to
shareholders of record on a date prior to the transfer into the name of the
Purchaser or its nominees or transferees on the Company's stock transfer
records of the Shares and Rights purchased pursuant to the Offer (except that
if the Rights are redeemed by the Company's Board of Directors, tendering
shareholders who are holders of record as of the applicable record date will be
entitled to receive and retain the Redemption Price for the Rights), and if
Shares are
 
                                       35
<PAGE>
 
purchased in the Offer, then, without prejudice to the Purchaser's rights under
Section 14, (i) the purchase price per Share payable by the Purchaser pursuant
to the Offer shall be reduced by the amount of any such cash dividend or cash
distribution and (ii) any such non-cash dividend, distribution (including,
without limitation, additional Shares), issuance, proceeds or rights to be
received by the tendering shareholders shall (a) be received and held by the
tendering shareholders for the account of the Purchaser and will be required to
be promptly remitted and transferred by each tendering shareholder to the
Depositary for the account of the Purchaser, accompanied by appropriate
documentation of transfer or (b) at the direction of the Purchaser, be
exercised for the benefit of the Purchaser, in which case the proceeds of such
exercise will promptly be remitted to the Purchaser. Pending such remittance or
appropriate assurance thereof and subject to applicable law, the Purchaser will
be entitled to all rights and privileges as owner of any such non-cash
dividend, distribution, issuance, proceeds or rights and may withhold the
entire purchase price or deduct from the purchase price the amount or value
thereof, as determined by the Purchaser in its sole discretion.
 
14. CERTAIN CONDITIONS OF THE OFFER
 
  Notwithstanding any other provision of the Offer, the Purchaser shall not be
required to accept for payment or, subject to any applicable rules and
regulations of the Commission, including, without limitation, Rule 14e-l(c)
under the Exchange Act (relating to the Purchaser's obligation to pay for or
return tendered Shares promptly after expiration or termination of the Offer),
to pay for any Shares tendered pursuant to the Offer, and may postpone the
acceptance for payment or, subject to the restriction referred to above,
payment for any Shares tendered pursuant to the Offer, and may extend, amend or
terminate the Offer (whether or not any Shares have theretofore been purchased
or paid for) if, in the sole judgment of the Purchaser, (i) any condition to
consummation of the Offer set forth in the Introduction to this Offer to
Purchase (the Minimum Condition, the Rights Condition and the Business
Combination Condition) has not been satisfied or (ii) at any time on or after
July 21, 1995 and before acceptance for payment of, or payment for, such
Shares, any of the following events shall occur or shall be deemed by the
Purchaser to have occurred, or Parent or the Purchaser shall have learned about
any such event applicable to or affecting the Company or any of its
subsidiaries:
 
    (a) there shall have been threatened, instituted or pending any action,
  proceeding, application, claim or counterclaim by or before any court or
  governmental, regulatory or administrative agency, authority or tribunal,
  domestic, foreign or supranational (whether brought by the Company, an
  affiliate of the Company or any other person or entity), which (i)
  challenges or seeks to challenge the acquisition by the Purchaser of the
  Shares or Rights (or any of them), restrains, prohibits or delays or seeks
  to restrain, prohibit or delay the making or consummation of the Offer or
  the Proposed Merger or any other merger or transaction involving the
  Purchaser or any of its affiliates and the Company or any of its
  subsidiaries, restrains, prohibits or delays or seeks to restrain, prohibit
  or delay the performance of any of the contracts or other agreements or
  arrangements entered into by Parent or any of its affiliates in connection
  with the acquisition of the Company or the Shares or Rights (or any of
  them), or seeks to obtain any damages in connection with any of the
  foregoing, (ii) makes or seeks to make the purchase of or payment for, some
  or all of the Shares or Rights pursuant to the Offer, the Proposed Merger
  or otherwise, illegal, or results in or may result in a delay in the
  ability of the Purchaser to accept for payment or pay for some or all of
  the Shares or Rights or to consummate the Proposed Merger, (iii) imposes or
  seeks to impose limitations on the ability of Parent, the Purchaser or the
  Company or any of their respective affiliates or subsidiaries effectively
  to acquire or hold, or requiring Parent, the Purchaser, the Company or any
  of their respective affiliates or subsidiaries to dispose of or hold
  separate, any portion of the assets or the business of Parent, the
  Purchaser, the Company or any of their respective affiliates or
  subsidiaries or imposes or seeks to impose limitations on the ability of
  Parent, the Purchaser, the Company or any of their respective affiliates or
  subsidiaries to continue to conduct, own or operate all or any portion of
  their businesses and assets as heretofore conducted, owned or operated,
  (iv) imposes or seeks to impose or results in or may result in material
  limitations on the ability of Parent, the Purchaser or any of their
  affiliates to exercise full rights of ownership of the Shares or Rights
  purchased by them, including, but not limited to, the right to vote the
  Shares purchased by them on all matters properly
 
                                       36
<PAGE>
 
  presented to the shareholders of the Company, or the right to vote any
  shares of capital stock of any subsidiary directly or indirectly owned by
  the Company, (v) results in or may result in a material limitation or
  diminution in the benefits expected to be derived by Parent and the
  Purchaser as a result of the transactions contemplated by the Offer and the
  Proposed Merger, (vi) imposes or seeks to impose voting, procedural, price
  or other requirements in addition to those under the Illinois Law and
  federal securities laws (each as in effect on the date of this Offer to
  Purchase) in connection with the transactions contemplated by the Offer and
  the Proposed Merger or any material condition to the Offer that is
  unacceptable to the Purchaser or (vii) otherwise directly or indirectly
  relates to the Offer, the Proposed Merger or any other business combination
  with the Company or which otherwise, in the sole judgment of the Purchaser,
  might adversely affect the Company or any of its subsidiaries or Parent,
  the Purchaser or any of their respective affiliates or the value of the
  Shares; or
 
    (b) other than the application of the waiting periods under the HSR Act
  and the necessity for the approvals and other actions by any domestic,
  foreign or supranational government or governmental, administrative or
  regulatory authority or agency described in Section 15, any statute, rule,
  regulation, judgment, decree, order or injunction shall have been proposed,
  sought, promulgated, enacted, entered, enforced or shall be, or shall be
  deemed to be, applicable to the Offer or the Proposed Merger or other
  business combination between Parent, the Purchaser or any of their
  respective affiliates and the Company, including, without limitation, any
  state takeover statute or other similar statute or regulation, or any other
  action shall have been taken, by any domestic, foreign or supranational
  government or any governmental, administrative or regulatory authority or
  agency or by any court or tribunal, in each case whether domestic, foreign
  or supranational, that might, directly or indirectly, result in any of the
  consequences referred to in clauses (i) through (vii), inclusive, of
  paragraph (a) above; or
 
    (c) any change (or any condition, event or development involving a
  prospective change) shall have occurred or be threatened in the business,
  properties, assets, liabilities, capitalization, shareholders' equity,
  condition (financial or otherwise), operations, management, key personnel,
  licenses, permits, franchises, results of operations or prospects of the
  Company or any of its subsidiaries, or in general political, market,
  economic or financial conditions in the United States or abroad, which, in
  the sole judgment of the Purchaser, is or may be materially adverse to the
  Company or any of its subsidiaries or its shareholders, or the market price
  of, or trading in, the Shares, or Parent or the Purchaser shall have become
  aware of any facts which, in the sole judgment of the Purchaser, are or may
  be materially adverse with respect to the value of the Company or any of
  its subsidiaries or affiliates or the value of the Shares to Parent or the
  Purchaser or any of their respective affiliates; or
 
    (d) there shall have occurred (i) any general suspension of trading in,
  or limitation on prices or the availability of quotations for, securities
  on any national securities exchange or in the over-the-counter securities
  market in the United States, (ii) the declaration of any banking moratorium
  or any suspension of payments in respect of banks in the United States,
  (iii) any material adverse change (or any existing or threatened condition,
  event or development involving a prospective material adverse change) in
  United States or any other currency exchange rates or a suspension of, or a
  limitation on, the markets therefor, (iv) the commencement of a war, armed
  hostilities or other international or national calamity directly or
  indirectly involving the United States, (v) any limitations (whether or not
  mandatory) imposed by any governmental authority on, or any event which, in
  the sole judgment of the Purchaser, might have material adverse
  significance with respect to, the nature or extension of credit or further
  extension of credit by banks or other lending institutions, (vi) any
  significant adverse change in the market price of the Shares or generally
  in securities or financial markets in the United States or abroad,
  including, without limitation, a decline of at least 15% in either the Dow
  Jones Average of Industrial Stocks or the Standard & Poor's 500 Index from
  that existing at the close of business on July 21, 1995 or (vii) in the
  case of any of the foregoing, a material acceleration or worsening thereof;
  or
 
    (e) the Company or any of its subsidiaries shall have (i) issued,
  distributed, pledged or sold, or authorized, proposed or announced the
  issuance, distribution, pledge or sale of (A) any shares of capital stock
  of any class (including, without limitation, the Shares), or securities
  convertible into or
 
                                       37
<PAGE>
 
  exchangeable for any such shares, or any rights (other than the Rights),
  warrants, or options to acquire
  any such shares or convertible or exchangeable securities (other than the
  issuance of Shares reserved for issuance upon the exercise of stock options
  outstanding on December 31, 1994 that were issued under the Company's Stock
  Plan or the Company's Employee Stock Plan in accordance with the publicly
  disclosed terms thereof on or prior to such date) or (B) any other
  securities or rights in respect of, in lieu of, or in substitution for,
  capital stock of the Company, (ii) purchased or otherwise acquired or
  caused a reduction in, or proposed or offered to purchase or otherwise
  acquire, any Shares or other securities of the Company (except for
  redemption of the Rights in accordance with the terms of the Rights
  Agreement), (iii) declared or paid, or proposed to be declared or paid, any
  dividend or distribution on any shares of capital stock (other than regular
  cash dividends on the Shares at a quarterly rate not in excess of $.30 per
  Share or a distribution of the Rights Certificates in accordance with the
  terms of the Rights Agreement and, in the event the Rights are redeemed,
  the redemption price of the Rights), or issued, or authorized, recommended
  or proposed the issuance of, any other distribution in respect of any
  shares of capital stock, whether payable in cash, securities or other
  property, or altered or proposed to alter any material term of any
  outstanding security, (iv) issued, distributed or sold, or authorized,
  announced or proposed the issuance, distribution or sale of, any debt
  securities or any securities convertible into or exchangeable for debt
  securities or any rights, warrants or options entitling the holder thereof
  to purchase or otherwise acquire any debt securities, or incurred, or
  authorized or proposed the incurrence of, any debt other than in the
  ordinary course of business and consistent with past practice, or any debt
  containing burdensome covenants, (v) entered into any agreement for, or
  authorized, recommended, proposed, effected or publicly announced its
  intention to authorize, recommend, propose, enter into or cause (A) any
  merger (other than the Proposed Merger), consolidation, liquidation,
  dissolution, business combination, joint venture, acquisition of assets or
  securities (other than a redemption of the Rights in accordance with the
  Rights Agreement) or disposition of assets or securities other than in the
  ordinary course of business, (B) any material change in its capitalization,
  (C) any release or relinquishment of any material contract rights or (D)
  any comparable event not in the ordinary course of business, (vi) entered
  into any agreement for, or authorized, recommended, proposed, effected or
  announced its intention to authorize, recommend, propose, enter into or
  cause, any transaction or arrangement which could adversely affect the
  value of the Shares, (vii) proposed, adopted or authorized or announced its
  intention to propose, adopt or authorize any amendment to the Company's
  Certificate or the Company's Bylaws or similar organizational documents or
  (other than any amendment which delays the Distribution Date) the Rights
  Agreement or (viii) agreed in writing or otherwise to take any of the
  foregoing actions; or
 
    (f) a tender or exchange offer for some portion or all of any outstanding
  securities of the Company or any of its subsidiaries or affiliates
  (including, without limitation, the Shares or Rights) shall have been
  publicly proposed to be made or shall have been made by another person
  (including, without limitation, the Company or any of its subsidiaries or
  affiliates), or it shall have been publicly disclosed or the Purchaser
  shall have learned that (i) any person (including, without limitation, the
  Company or any of its subsidiaries or affiliates), entity or "group" (as
  defined in Section 13(d)(3) of the Exchange Act) shall have acquired or
  proposed to acquire beneficial ownership of more than 5% of any class or
  series of capital stock of the Company (including, without limitation, the
  Shares or Rights) or its subsidiaries or shall have been granted any
  warrant, option or right, conditional or otherwise, to acquire beneficial
  ownership of more than 5% of any class or series of capital stock of the
  Company (including, without limitation, the Shares or Rights) or its
  subsidiaries, other than acquisitions of Shares for bona fide arbitrage
  positions, (ii) any such person, entity or group which has publicly
  disclosed any such beneficial ownership of or right to acquire beneficial
  ownership of more than 5% of any class or series of capital stock of the
  Company (including, without limitation, the Shares or Rights) or its
  subsidiaries prior to July 21, 1995 shall have acquired or proposed to
  acquire beneficial ownership of additional shares of any class or series of
  capital stock of the Company (including, without limitation, the Shares or
  Rights) or its subsidiaries constituting more than 1% of such class or
  series or shall have been granted any option or right to acquire beneficial
  ownership of more than 1% of such class or series of capital stock of the
 
                                       38
<PAGE>
 
  Company (including, without limitation, the Shares or Rights) or its
  subsidiaries, (iii) any group shall have been formed which beneficially
  owns more than 5% of any class or series of capital stock of the Company
  (including, without limitation, the Shares or Rights) or its subsidiaries,
  (iv) any person, entity or group shall have entered into a definitive
  agreement or an agreement in principle or made a proposal with respect to a
  tender offer or exchange offer for the Shares or Rights or a merger,
  consolidation or other business combination with or involving the Company
  or its subsidiaries or (v) any person, entity or group shall have filed a
  Premerger Notification and Report Form under the HSR Act in order to, or
  made a public announcement reflecting an intent to, acquire the Company or
  any of its subsidiaries or assets or securities of the Company or any of
  its subsidiaries; or
 
    (g) (i) the Company and Parent shall have reached an agreement or
  understanding that the Offer be terminated or amended or the purchase or
  payment for Shares be postponed pursuant thereto or (ii) Parent, the
  Purchaser or any of their respective affiliates shall have entered into a
  definitive agreement or announced an agreement in principle with respect to
  the Proposed Merger or any other business combination with the Company or
  any of its affiliates or the purchase of any material portion of the
  securities or assets of the Company or any of its subsidiaries; or
 
    (h) the Company or any of its subsidiaries shall have entered into any
  employment, severance or similar agreement, arrangement or plan with or for
  the benefit of any of its employees or entered into or amended any
  agreements, arrangements or plans so as to provide for increased or
  accelerated compensation or payment or funding of the benefits to any such
  employees as a result of or in connection with the transactions
  contemplated by the Offer or the Proposed Merger or any other business
  combination involving the Company or any of its subsidiaries or otherwise
  amended any such agreement, arrangement or plan to make the same more
  favorable to any such employee; or
 
    (i) the Purchaser shall become aware (i) that any material contractual
  right of the Company or any of its subsidiaries shall be impaired or
  otherwise adversely affected or that any material amount of indebtedness of
  the Company or any of its subsidiaries shall become accelerated or
  otherwise become due or become subject to acceleration prior to its stated
  due date, in any case with or without notice or the lapse of time or both
  as a result of or in connection with the transactions contemplated by the
  Offer or the Proposed Merger or any other business combination involving
  the Company, (ii) of any covenant, term or condition in any of the
  Company's or any of its subsidiaries' instruments or agreements that has or
  may have (whether considered alone or in the aggregate with other
  covenants, terms or conditions), a material adverse effect on (x) the
  business, properties, assets, liabilities, capitalization, shareholders'
  equity, condition (financial or otherwise), operations, management, key
  personnel, licenses, franchises, results of operations or prospects of the
  Company or any of its subsidiaries (including, but not limited to, any
  event of default that may result from the consummation of the Offer, the
  acquisition of control of the Company or any of its subsidiaries or the
  Proposed Merger or any other business combination involving the Company) or
  (y) the value of the Shares in the hands of Parent, the Purchaser or any of
  their respective affiliates or (z) the consummation by Parent, the
  Purchaser or any of their respective affiliates of the Offer and the
  Proposed Merger or any other business combination involving the Company or
  (iii) that any report, document, instrument, financial statement or
  schedule of the Company or any of its subsidiaries filed with the
  Commission contained, when filed, an untrue statement of a material fact or
  omitted to state a material fact required to be stated therein or necessary
  in order to make the statements made therein, in light of the circumstances
  under which they were made, not misleading; or
 
    (j) except as may be required by law, the Company or any of its
  subsidiaries shall have taken any action to adopt a new or terminate or
  amend any existing employee benefit plan (as defined in Section 3(2) of the
  Employee Retirement Income Security Act of 1974, as amended) of the Company
  or any of its subsidiaries, or agreed in writing or otherwise to take any
  such action; or
 
    (k) any waiting periods under the HSR Act applicable to the purchase of
  Shares pursuant to the Offer shall not have expired or been terminated, or
  any approval, permit, authorization, consent or other action of any
  domestic, foreign or supranational governmental, administrative or
  regulatory agency,
 
                                       39
<PAGE>
 
  authority or tribunal (including, without limitation, those described in
  Section 15) required in connection with the Offer and the Proposed Merger
  shall not have been obtained on terms satisfactory to the Purchaser in its
  sole discretion.
 
  The foregoing conditions are for the sole benefit of the Purchaser and its
affiliates and may be asserted by the Purchaser regardless of the circumstances
(including, without limitation, any action or inaction by the Purchaser or any
of its affiliates) giving rise to any such condition or may be waived by the
Purchaser, in whole or in part, from time to time in its sole discretion. The
failure by the Purchaser at any time to exercise any of the foregoing rights
shall not be deemed a waiver of any such rights and each such right shall be
deemed an ongoing right and may be asserted at any time and from time to time.
Any determination by the Purchaser concerning any of the events described in
this Section 14 shall be final, conclusive and binding upon all parties.
 
  A public announcement shall be made of a material change in, or waiver of,
such conditions, to the extent required by Rules 14d-4(c) and 14d-6(d) under
the Exchange Act and the Offer shall, in certain circumstances, be extended in
connection with any such change or waiver to the extent required by such rules.
 
  The Purchaser acknowledges that the Commission believes that (i) if the
Purchaser is delayed in accepting the Shares it must either extend the Offer or
terminate the Offer and promptly return the Shares and (ii) the circumstances
in which a delay in payment is permitted are limited and do not include
unsatisfied conditions of the Offer, except with respect to most regulatory
approvals.
 
15. CERTAIN LEGAL MATTERS; REQUIRED REGULATORY APPROVALS
 
  Except as set forth in this Offer to Purchase, based on its review of
publicly available filings by the Company with the Commission and other
publicly available information regarding the Company, neither Parent nor the
Purchaser is aware of any licenses or regulatory permits that appear to be
material to the business of the Company and its subsidiaries, taken as a whole,
and that might be adversely affected by the Purchaser's acquisition of Shares
(and the indirect acquisition of the stock of the Company's subsidiaries) as
contemplated herein, or any filings, approvals or other actions by or with any
domestic, foreign or supranational governmental authority or administrative or
regulatory agency that would be required for the acquisition or ownership of
the Shares (or the indirect acquisition of the stock of the Company's
subsidiaries) by the Purchaser pursuant to the Offer as contemplated herein.
Should any such approval or other action be required, it is presently
contemplated that such approval or action would be sought except as described
below under "State Takeover Laws." Should any such approval or other action be
required, there can be no assurance that any such approval or action, if
needed, would be obtained without substantial conditions or that adverse
consequences might not result to the Company's or its subsidiaries' businesses,
or that certain parts of the Company's, Parent's, the Purchaser's or any of
their respective subsidiaries' businesses might not have to be disposed of or
held separate or other substantial conditions complied with in order to obtain
such approval or action or in the event that such approvals were not obtained
or such actions were not taken, any of which could cause the Purchaser to elect
to terminate the Offer without the purchase of the Shares thereunder. The
Purchaser's obligation to purchase and pay for Shares is subject to certain
conditions, including, without limitation, conditions with respect to
litigation and governmental actions. See the Introduction and Section 14 for a
description thereof.
 
 State Takeover Laws
 
  A number of states (including Illinois, where the Company is incorporated)
have adopted takeover laws and regulations which purport, to varying degrees,
to be applicable to attempts to acquire securities of corporations which are
incorporated in such states or which have or whose business operations have
 
                                       40
<PAGE>
 
substantial economic effects in such states, or which have substantial assets,
shareholders, principal executive offices or principal places of business
therein. To the extent that certain provisions of certain of these state
takeover statutes purport to apply to the Offer or the Proposed Merger, the
Purchaser believes that such laws conflict with federal law and constitute an
unconstitutional burden on interstate commerce. In 1982, the Supreme Court of
the United States, in Edgar v. Mite Corp., invalidated on constitutional
grounds the Illinois Business Takeovers Act which, as a matter of state
securities law, made takeovers of corporations meeting certain requirements
more difficult, and the reasoning in such decision is likely to apply to
certain other state takeover statutes. In 1987, however, in CTS Corp. v.
Dynamics Corp. of America, the Supreme Court of the United States held that the
State of Indiana could, as a matter of corporate law and, in particular, those
aspects of corporate law concerning corporate governance, constitutionally
disqualify a potential acquiror from voting on the affairs of a target
corporation without the prior approval of the remaining shareholders, provided
that such laws were applicable only under certain conditions. Subsequently, in
TLX Acquisition Corp. v. Telex Corp., a federal district court in Oklahoma
ruled that the Oklahoma statutes were unconstitutional insofar as they apply to
corporations incorporated outside Oklahoma in that they would subject such
corporations to inconsistent regulations. Similarly, in Tyson Foods, Inc. v.
McReynolds, a federal district court in Tennessee ruled that four Tennessee
takeover statutes were unconstitutional as applied to corporations incorporated
outside Tennessee. This decision was affirmed by the United States Court of
Appeals for the Sixth Circuit. In December 1988, a federal district court in
Florida held in Grand Metropolitan PLC v. Butterworth that the provisions of
the Florida Affiliated Transactions Act and Florida Control Share Acquisition
Act were unconstitutional as applied to corporations incorporated outside of
Florida.
 
  For a discussion of the relevant Illinois takeover statutes, see the
Introduction and Section 11.
 
  Except as described in the Introduction and Section 11 with respect to the
Business Combination Law, the Purchaser has not attempted to comply with any
state takeover statutes in connection with the Offer or the Proposed Merger.
The Purchaser reserves the right to challenge the validity or applicability of
any state law allegedly applicable to the Offer or the Proposed Merger and
nothing in this Offer to Purchase nor any action taken in connection herewith
is intended as a waiver of that right. In the event that it is asserted that
one or more takeover statutes apply to the Offer or the Proposed Merger, and it
is not determined by an appropriate court that such statute or statutes do not
apply or are invalid as applied to the Offer or the Proposed Merger, as
applicable, the Purchaser may be required to file certain documents with, or
receive approvals from, the relevant state authorities, and the Purchaser might
be unable to accept for payment or purchase Shares tendered pursuant to the
Offer or be delayed in continuing or consummating the Offer. In such case, the
Purchaser may not be obligated to accept for purchase, or pay for, any Shares
tendered. See Section 14.
 
 Antitrust
 
  Under the HSR Act, and the rules and regulations that have been promulgated
thereunder by the FTC, certain acquisition transactions may not be consummated
until certain information and documentary material has been furnished for
review by the Antitrust Division and the FTC and certain waiting period
requirements have been satisfied. The acquisition of Shares pursuant to the
Offer is subject to such requirements. Parent intends to file on July 24, 1995,
with the FTC and the Antitrust Division a Premerger Notification and Report
Form in connection with the purchase of Shares pursuant to the Offer. Under the
provisions of the HSR Act applicable to the Offer, the purchase of Shares
pursuant to the offer may not be consummated until the expiration of a 15-
calendar day waiting period following the filing by Parent. Accordingly, the
waiting period under the HSR Act applicable to such purchases of Shares
pursuant to the Offer should expire at 11:59 p.m., New York City time, on
August 8, 1995, unless such waiting period is earlier terminated by the FTC and
the Antitrust Division or extended by a request from the FTC or the Antitrust
Division for additional information or documentary material prior to the
expiration of the waiting period. If, however, either the FTC or the Antitrust
Division were to request additional information or documentary material from
Parent,
 
                                       41
<PAGE>
 
the waiting period would expire at 11:59 p.m., New York City time, on the tenth
calendar day after the date of substantial compliance by Parent with such
request. Thereafter, the waiting period could be extended only by court order
or by agreement. If the acquisition of Shares is delayed pursuant to a request
by the FTC or the Antitrust Division for additional information or documentary
material pursuant to the HSR Act, the Offer may, but need not, be extended and,
in any event, the purchase of and payment for Shares will be deferred until 10
days after the request is substantially complied with, unless the 10-day
extended period expires on or before the date when the initial 15-day period
would otherwise have expired or unless the waiting period is sooner terminated
by the FTC and the Antitrust Division. See Section 2. Only one extension of
such waiting period pursuant to a request for additional information is
authorized by the HSR Act and the rules promulgated thereunder, except by court
order. Any such extension of the waiting period will not give rise to any
withdrawal rights not otherwise provided for by applicable law. See Section 4.
Although the Company is required to file certain information and documentary
material with the Antitrust Division and the FTC in connection with the Offer,
neither the Company's failure to make such filings nor a request from the
Antitrust Division or the FTC for additional information or documentary
material made to the Company will extend the waiting period.
 
  The FTC and the Antitrust Division may scrutinize the legality under the
antitrust laws of transactions such as the proposed acquisition of Shares by
the Purchaser pursuant to the Offer. At any time before or after the purchase
by the Purchaser of Shares pursuant to the offer, the FTC and the Antitrust
Division could take such action under the antitrust laws as it deems necessary
or desirable, including, without limitation, seeking to enjoin the purchase of
Shares pursuant to the offer or seeking the divestiture of Shares purchased by
the Purchaser or the divestiture of substantial assets of Parent, its
subsidiaries or the Company. Private parties and state attorneys general may
also bring legal action under federal or state antitrust laws under certain
circumstances. Based upon an examination of publicly available information
relating to the businesses in which Parent and its subsidiaries and the Company
and its subsidiaries are engaged, Parent and the Purchaser believe that the
Offer will not violate the antitrust laws. Nevertheless, there can be no
assurance that a challenge to the Offer on antitrust grounds will not be made
or, if such a challenge is made, of the result. See Section 14.
 
  Foreign Approvals. According to the Company's 1994 10-K, the Company owns and
operates one Canadian subsidiary. The Purchaser believes no filings are
required to be made under the Investment Canada Act, which regulates
acquisition of control of Canadian businesses by non-Canadians, because the
value of the assets of all of the acquired entities carrying on a Canadian
business is not more than 50% of the value of the assets of all entities
control of which is to be acquired pursuant to the Offer. Premerger
notification will also likely not be required under the Canadian Competition
Act, which requires such notification with respect to transactions in which
parties to the transaction and their affiliates have assets in Canada, or
annual gross revenues from sales in, from or into Canada in excess of Cdn $400
million (approximately US $300 million as of July 21, 1995). In connection with
the acquisition of the Shares pursuant to the Offer, the laws of Canada and/or
certain other foreign countries and jurisdictions may require the filing of
information with, or the obtaining of the approval of, governmental authorities
in such countries and jurisdictions. The governments in such countries and
jurisdictions might attempt to impose additional conditions on the Company's
operations conducted in such countries and jurisdictions as a result of the
acquisition of the Shares pursuant to the Offer or the Proposed Merger. There
can be no assurance that the Purchaser will be able to cause the Company or its
subsidiaries to satisfy or comply with such laws or that compliance or
noncompliance will not have adverse consequences for the Company or any
subsidiary after purchase of the Shares pursuant to the Offer or the Proposed
Merger.
 
  Margin Credit Regulations. Federal Reserve Board Regulations G, T, U and X
(the "Margin Credit Regulations") restrict the extension or maintenance of
credit for the purpose of buying or maintaining margin stock, if the credit is
secured directly or indirectly thereby. The borrowings under the Credit
Facility will not be directly secured by a pledge of the Shares. In addition,
Parent and the Purchaser believe that such borrowings will not be "indirectly
secured" within the meaning of the Margin Credit Regulations, as interpreted.
Accordingly, Parent and the Purchaser believe that the Margin Credit
Regulations are not applicable to the borrowings under the Credit Facility.
 
                                       42
<PAGE>
 
16. CERTAIN FEES AND EXPENSES
 
  Merrill Lynch is acting as Dealer Manager in connection with the Offer and
serving as financial advisor to the Purchaser and Parent in connection with the
Proposed Merger. As compensation for such services, Parent has agreed to pay
Merrill Lynch a fee of $500,000, $400,000 of which fee is payable upon
commencement by Parent or one of its affiliates of a tender offer or exchange
offer for securities of the Company. Parent has also agreed to pay Merrill
Lynch a fee of up to $2,000,000 (less any fees theretofore paid) contingent
upon consummation of an Acquisition Transaction. "Acquisition Transaction" has
been defined to include (i) any merger, consolidation, reorganization or other
business combination pursuant to which the business of the Company is combined
with that of Parent or one of its affiliates; (ii) the acquisition, directly or
indirectly, by Parent or one of its affiliates by tender or exchange offer,
negotiated purchase or other means of at least 50% of the then outstanding
capital stock of the Company; (iii) the acquisition, directly or indirectly, by
Parent or one of its affiliates of at least 50% of the assets of, or of any
right to all or a substantial portion of the revenues or income of the Company;
or (iv) the acquisition, directly or indirectly, by Parent or one of its
affiliates of control of the Company through a proxy contest or otherwise than
through the acquisition of the Company's voting capital stock. In addition,
Parent has agreed to reimburse Merrill Lynch for its reasonable out-of-pocket
expenses, including, without limitation, reasonable fees and disbursements of
its counsel, incurred in connection with the Offer and the Proposed Merger or
otherwise arising out of Merrill Lynch's engagement, and has also agreed to
indemnify Merrill Lynch (and certain affiliated persons) against certain
liabilities and expenses, including, without limitation, certain liabilities
under the federal securities laws. Merrill Lynch may from time to time in the
future render various investment banking services to Parent and its affiliates,
for which it is expected it would be paid customary fees.
 
  D.F. King & Co., Inc. has been retained by the Purchaser as Information Agent
in connection with the Offer. The Information Agent may contact holders of
Shares and Rights by mail, telephone, telex, telegraph and personal interview
and may request brokers, dealers and other nominee shareholders to forward
material relating to the Offer to beneficial owners of Shares and Rights. The
Purchaser will pay the Information Agent reasonable and customary compensation
for all such services in addition to reimbursing the Information Agent for
reasonable out-of-pocket expenses in connection therewith. The Purchaser has
agreed to indemnify the Information Agent against certain liabilities and
expenses in connection with the Offer, including, without limitation, certain
liabilities under the federal securities laws.
 
  In addition, Bank of America Illinois has been retained as the Depositary.
The Purchaser will pay the Depositary reasonable and customary compensation for
its services in connection with the Offer, will reimburse the Depositary for
its reasonable out-of-pocket expenses in connection therewith and will
indemnify the Depositary against certain liabilities and expenses in connection
therewith, including, without limitation, certain liabilities under the federal
securities laws.
 
  Except as set forth above, neither Parent nor the Purchaser will pay any fees
or commissions to any broker, dealer or other person for soliciting tenders of
Shares and Rights pursuant to the Offer. Brokers, dealers, commercial banks and
trust companies and other nominees will, upon request, be reimbursed by Parent
or the Purchaser for customary clerical and mailing expenses incurred by them
in forwarding offering materials to their customers.
 
17. MISCELLANEOUS
 
  The Offer is being made solely by this Offer to Purchase and the related
Letter of Transmittal. The Offer is not being made to (nor will tenders be
accepted from or on behalf of) holders of Shares or Rights residing in any
jurisdiction in which the making of the Offer or the acceptance thereof would
not be in compliance with the securities, blue sky or other laws of such
jurisdiction. However, the Purchaser may, in its discretion, take such action
as it may deem necessary to make the Offer in any jurisdiction and extend the
Offer to holders of Shares in such jurisdiction.
 
                                       43
<PAGE>
 
  In any jurisdiction where the securities, blue sky or other laws require the
Offer to be made by a licensed broker or dealer, the Offer will be deemed to be
made on behalf of the Purchaser by the Dealer Manager or one or more registered
brokers or dealers that are licensed under the laws of such jurisdiction.
 
  Parent and the Purchaser have filed with the Commission a Schedule 14D-1,
together with exhibits, pursuant to Rule 14d-3 of the General Rules and
Regulations under the Exchange Act, furnishing certain additional information
with respect to the Offer, and may file amendments thereto. Such Schedule 14D-1
and any amendments thereto, including exhibits, may be examined and copies may
be obtained from the office of the Commission in the same manner as described
in Section 8 with respect to information concerning the Company, except that
they will not be available at the regional offices of the Commission.
 
  NO PERSON HAS BEEN AUTHORIZED TO GIVE ANY INFORMATION OR TO MAKE ANY
REPRESENTATION ON BEHALF OF PARENT OR THE PURCHASER NOT CONTAINED IN THIS OFFER
TO PURCHASE OR IN THE LETTER OF TRANSMITTAL AND, IF GIVEN OR MADE, ANY SUCH
INFORMATION OR REPRESENTATION MUST NOT BE RELIED UPON AS HAVING BEEN
AUTHORIZED. Neither the delivery of the Offer to Purchase nor any purchase
pursuant to the Offer shall, under any circumstances, create any implication
that there has been no change in the affairs of Parent, the Purchaser, the
Company or any of their respective subsidiaries since the date as of which
information is furnished or the date of this Offer to Purchase.
 
                                          TK ACQUISITION CORPORATION
 
July 24, 1995
 
                                       44
<PAGE>
 
                                   SCHEDULE I
 
                        DIRECTORS AND EXECUTIVE OFFICERS
                          OF PARENT AND THE PURCHASER
 
                                     PARENT
 
  Set forth below are the name, business address and present principal
occupation or employment, and material occupations, positions, offices or
employments for the past five years of each director and executive officer of
Parent. Except as otherwise noted, the business address of each such person is
1250 24th Street N.W., Washington, D.C. 20037, and each such person is a United
States citizen. In addition, except as otherwise noted, each director and
executive officer of Parent has been employed in his or her present principal
occupation listed below during the last five years. Directors of Parent are
indicated by an asterisk.
 
<TABLE>
<CAPTION>
                                       POSITIONS, OFFICES OR EMPLOYMENTS FOR PAST FIVE
NAME AND BUSINESS ADDRESS              YEARS
- -------------------------              --------------------------------------------------
<S>                                    <C>
Patrick W. Allender................... Mr. Allender is Senior Vice President, Chief
                                       Financial Officer and Secretary of Parent. He has
                                       held such position since 1987.
C. Scott Brannan...................... Mr. Brannan is Vice President Administration and
                                       Controller of Parent. He has held such position
                                       since 1987.
Mortimer M. Caplin*................... Mr. Caplin has been Senior member of Caplin &
Caplin & Drysdale                      Drysdale, a law firm in Washington, D.C. for more
One Thomas Circle, N.W.                than five years. He is a Director of Fairchild
Suite 1100                             Industries, Inc., Fairchild Corporation,
Washington, D.C. 20005                 Presidential Realty Corporation and Unigene
                                       Laboratories, Inc.
Dennis D. Claramunt................... Mr. Claramunt was appointed Vice President and
                                       Group Executive of Parent in 1994. He has served
                                       as President of Jacobs Chuck Manufacturing Company
                                       for more than five years.
James H. Ditkoff...................... Mr. Ditkoff was appointed Vice President-
                                       Finance/Tax of Parent in January, 1991. He has
                                       served in an executive capacity in finance/tax for
                                       Parent since 1988.
Donald J. Ehrlich*.................... Mr. Ehrlich has been President, Chief Executive
Wabash National Corporation            Officer and Director of Wabash National
1000 Sagamore Parkway South            Corporation since its inception in 1985. He is a
Lafayette, IN 47905                    Director of Indiana Secondary Market for
                                       Educational Loans, Inc. and NBD Bank, N.A.,
                                       Northwest.
Walter G. Lohr, Jr.*.................. Mr. Lohr has been a Partner of Hogan & Hartson, a
Hogan & Hartson                        law firm in Baltimore, Maryland since 1992. He was
111 South Calvert Street               an attorney in private practice from 1987 to 1992.
Suite 1600
Baltimore, MD 21202-6191
Mitchell P. Rales*.................... Mr. Rales is Chairman of the Executive Committee
                                       of Parent. He has held such position since
                                       February 1990. He has been a General Partner of
                                       Equity Group Holdings, a general partnership
                                       located in Washington, D.C., with interests in
                                       manufacturing companies, media operations, and
                                       publicly traded securities, since 1979.
</TABLE>
 
 
                                      S-1
<PAGE>
 
<TABLE>
<CAPTION>
                                       POSITIONS, OFFICES OR EMPLOYMENTS FOR PAST FIVE
NAME AND BUSINESS ADDRESS              YEARS
- -------------------------              --------------------------------------------------
<S>                                    <C>
Steven M. Rales*...................... Mr. Rales is Chairman of the Board of Parent, a
                                       position he has held since 1984. He was Chief
                                       Executive Officer of Parent until February 1990.
                                       He has been a General Partner of Equity Group
                                       Holdings, a general partnership located in
                                       Washington, D.C., with interests in manufacturing
                                       companies, media operations, and publicly traded
                                       securities, since 1979.
George M. Sherman*.................... Mr. Sherman is President, Chief Executive Officer
                                       and Director of Parent. He has held such positions
                                       since February 1990.
A. Emmet Stephenson, Jr.*............. Mr. Stephenson has been President of Stephenson
Stephenson & Company                   and Co., a private investment management firm in
100 Garfield Street                    Denver, Colorado and Senior Partner of Stephenson
Denver, CO 80206                       Merchant Banking for more than five years.
John P. Watson........................ Mr.Watson was appointed Vice President and Group
                                       Executive of Parent in 1993. He has served Parent
                                       in an executive capacity in its Tool Group since
                                       September, 1990. He was Executive Vice President
                                       for the Sterling Group, a division of the Kohler
                                       Company, prior thereto.
</TABLE>
 
                                      S-2
<PAGE>
 
                                 THE PURCHASER
 
  Set forth below are the name and position with the Purchaser of each director
and executive officer of the Purchaser. The principal business address of each
such person is 1250 24th Street N.W., Washington, D.C. 20037. Each such person
is a United States citizen. No such person owns, beneficially or otherwise, any
Shares. For further information regarding such persons, see pages S-1 and S-2
above.
 
<TABLE>
<CAPTION>
                                                    PRESENT OFFICE OR OTHER
               NAME                           PRINCIPAL OCCUPATION OR EMPLOYMENT
               ----                           ----------------------------------
 <S>                                <C>
 Mitchell P. Rales................  Director.
 Steven M. Rales..................  Director.
 George M. Sherman................  President and Director.
 Patrick W. Allender..............  Vice President and Treasurer.
 C. Scott Brannan.................  Vice President and Secretary.
</TABLE>
 
 
                                      S-3
<PAGE>
 
  Facsimile copies of the Letter of Transmittal, properly completed and duly
executed, will be accepted. The Letter of Transmittal, certificates for Shares
and Rights and any other required documents should be sent or delivered by each
shareholder of the Company or by such shareholder's broker, dealer, commercial
bank, trust company or other nominee to the Depositary at one of its addresses
set forth below:
 
                       THE DEPOSITARY FOR THE OFFER IS:
                           BANK OF AMERICA ILLINOIS
 
       By Mail:        By Facsimile Transmission:         By Hand or Overnight 
                            (312) 923-0271                      Delivery: 

 Bank of America Illinois                               Bank of America Illinois
Corporate Trust Depositary                                  231 LaSalle Street 
    P.O. Box 805857        Information and Confirm by        19 Floor Window 
 Chicago, IL 60680-4120            Telephone:              (Clark Street Side) 
                                 (800) 962-9324             Chicago, IL 60697 
                                                          Attn: Corporate Trust
                                                            Operations Window

  Questions and requests for assistance may be directed to the Information
Agent or the Dealer Manager at their respective addresses and telephone numbers
set forth below. Additional copies of this Offer to Purchase, the Letter of
Transmittal and other tender offer materials may be obtained from the
Information Agent as set forth below, and will be furnished promptly at the
Purchaser's expense. You may also contact your broker, dealer, commercial bank,
trust company or other nominee for assistance concerning the Offer.
 
                    The Information Agent for the Offer is:
 
                             D.F. KING & CO., INC.
 
                                77 Water Street
                            New York, New York 10005
                         (212) 269-5550 (Call Collect)
                                       or
                                 (800) 758-7358
 
                      The Dealer Manager for the Offer is:
 
                              MERRILL LYNCH & CO.
 
                             World Financial Center
                                  North Tower
                         New York, New York 10281-1305
                         (212) 236-4565 (Call Collect)

<PAGE>
                                                                EXHIBIT 11(a)(2)

                             LETTER OF TRANSMITTAL
                        TO TENDER SHARES OF COMMON STOCK
            (INCLUDING THE ASSOCIATED COMMON STOCK PURCHASE RIGHTS)
                                       OF
 
                               JOSLYN CORPORATION
 
                       PURSUANT TO THE OFFER TO PURCHASE
                              DATED JULY 24, 1995
                                       BY
 
                           TK ACQUISITION CORPORATION
 
                     AN INDIRECT WHOLLY OWNED SUBSIDIARY OF
                              DANAHER CORPORATION
 
 THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK CITY
 TIME, ON FRIDAY, AUGUST 18, 1995, UNLESS THE OFFER IS EXTENDED.
 
                        The Depositary for the Offer is:
 
                            BANK OF AMERICA ILLINOIS
 
        By Mail:           By Facsimile Transmission:   By Hand or Overnight
                                 (312) 923-0271               Courier:
 
                                 
 

Bank of America Illinois                              Bank of America Illinois
     Corporate Trust        Confirm by Telephone:        231 La Salle Street
       Depositary               (800) 962-9324            19th Floor Window
     P.O. Box 805857                                     (Clark Street Side)
 Chicago, IL 60680-4120                                 Attn: Corporate Trust
                                                          Operations Window    
                                                        
 
  DELIVERY OF THIS LETTER OF TRANSMITTAL TO AN ADDRESS OTHER THAN AS SET FORTH
ABOVE, OR TRANSMISSIONS OF INSTRUCTIONS VIA A FACSIMILE NUMBER OTHER THAN AS
SET FORTH ABOVE WILL NOT CONSTITUTE A VALID DELIVERY.
 
  SIGNATURES MUST BE PROVIDED ON THE INSIDE AND REVERSE BACK COVER. PLEASE READ
THE ACCOMPANYING INSTRUCTIONS CAREFULLY.
 
  This Letter of Transmittal is to be completed by holders of Shares (as
defined below) either if certificates are to be forwarded herewith or, unless
an Agent's Message (as defined in Section 2 of the Offer to Purchase (as
defined below)) is utilized, if a tender of Shares (and, if applicable, the
associated Rights) are to be made by book-entry transfer into the account of
Bank of America Illinois as Depositary (the "Depositary"), at The Depository
Trust Company ("DTC"), the Midwest Securities Trust Company ("MSTC") or the
Philadelphia Depository Trust Company ("PDTC") (each a "Book-Entry Transfer
Facility" and collectively the "Book-Entry Transfer Facilities") pursuant to
the procedures set forth in Section 3 of the Offer to Purchase (as defined
below). UNLESS AND UNTIL TK ACQUISITION CORPORATION DECLARES THAT THE RIGHTS
CONDITION (AS DEFINED IN THE OFFER TO PURCHASE) IS SATISFIED, HOLDERS OF SHARES
WILL BE REQUIRED TO TENDER ONE RIGHT FOR EACH SHARE TENDERED IN ORDER TO EFFECT
A VALID TENDER OF SUCH SHARE. If the Distribution Date (as defined in the Offer
to Purchase) has not occurred prior to the time Shares are tendered pursuant to
the Offer, a tender of
<PAGE>
 
Shares will also constitute a tender of the associated Rights. See Section 3 of
the Offer to Purchase. If the Distribution Date has occurred, and certificates
representing Rights (the "Rights Certificates") have been distributed to
holders of Shares, such holders of Shares will be required to tender Rights
Certificates representing a number of Rights equal to the number of Shares
being tendered in order to effect a valid tender of such Shares.
 
  Holders of Shares whose certificates for such Shares (the "Share
Certificates") and, if applicable, Rights Certificates are not immediately
available or who cannot deliver their Share Certificates or, if applicable,
Rights Certificates and all other required documents to the Depositary prior to
the Expiration Date (as defined in Section 1 of the Offer to Purchase), or who
cannot complete the procedure for book-entry transfer on a timely basis, must
tender their Shares and, if applicable, Rights according to the guaranteed
delivery procedure set forth in Section 3 of the Offer to Purchase. See
Instruction 2. Delivery of documents to a Book-Entry Transfer Facility does not
constitute delivery to the Depositary.
 
[_]CHECK HERE IF SHARES ARE BEING DELIVERED BY BOOK-ENTRY TRANSFER MADE TO AN
   ACCOUNT MAINTAINED BY THE DEPOSITARY WITH A BOOK-ENTRY TRANSFER FACILITY AND
   COMPLETE THE FOLLOWING:
 
  Name of Tendering Institution: ____________________________________________
 
  Check Box of Book-Entry Transfer Facility:
 
      [_] DTC                           [_] MSTC                 [_] PDTC
 
  Account Number: ________________  Transaction Code Number: ________________
 
[_]CHECK HERE IF SHARES ARE BEING DELIVERED PURSUANT TO A NOTICE OF GUARANTEED
   DELIVERY PREVIOUSLY SENT TO THE DEPOSITARY AND COMPLETE THE FOLLOWING.
   PLEASE ENCLOSE A PHOTOCOPY OF SUCH NOTICE OF GUARANTEED DELIVERY.
 
  Name(s) of Registered Holder(s): __________________________________________
 
  Window Ticket Number (if any): ____________________________________________
 
  Date of Execution of Notice of Guaranteed Delivery: _______________________
 
  Name of Institution which Guaranteed Delivery: ____________________________
 
[_]CHECK HERE IF RIGHTS ARE BEING DELIVERED BY BOOK-ENTRY TRANSFER (IF
   AVAILABLE) MADE TO AN ACCOUNT MAINTAINED BY THE DEPOSITARY WITH A BOOK-ENTRY
   TRANSFER FACILITY AND COMPLETE THE FOLLOWING:
 
  Name of Tendering Institution: ____________________________________________
 
  Check Box of Book-Entry Transfer Facility:
 
      [_] DTC                           [_] MSTC                 [_] PDTC
 
  Account Number: ________________  Transaction Code Number: ________________
 
                                       2
<PAGE>
 
[_]CHECK HERE IF RIGHTS ARE BEING DELIVERED PURSUANT TO A NOTICE OF GUARANTEED
   DELIVERY PREVIOUSLY SENT TO THE DEPOSITARY AND COMPLETE THE FOLLOWING.
   PLEASE ENCLOSE A PHOTOCOPY OF SUCH NOTICE OF GUARANTEED DELIVERY.
 
  Name(s) of Registered Holder(s): __________________________________________
 
  Window Ticket Number (if any): ____________________________________________
 
  Date of Execution of Notice of Guaranteed Delivery: _______________________
 
  Name of Institution which Guaranteed Delivery: ____________________________
 
                                       3
<PAGE>
 
                         DESCRIPTION OF SHARES TENDERED
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
NAME(S) AND ADDRESS(ES) OF REGISTERED HOLDER(S)            SHARE CERTIFICATE(S) AND
 (PLEASE FILL IN, IF BLANK, EXACTLY AS NAME(S)                SHARE(S) TENDERED
      APPEAR(S) ON SHARE CERTIFICATE(S))            (ATTACH ADDITIONAL LIST, IF NECESSARY)
- ---------------------------------------------------------------------------------------------
                                                              TOTAL NUMBER
                                                                OF SHARES
                                                    SHARE    REPRESENTED BY
                                                 CERTIFICATE      SHARE      NUMBER OF SHARES
                                                 NUMBER(S)*  CERTIFICATE(S)*    TENDERED**
<S>                                              <C>         <C>             <C> 
- ---------------------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------------------
                                                 TOTAL SHARES
</TABLE>
 
 
- --------------------------------------------------------------------------------
  * Need not be completed by Book-Entry Shareholders.
 ** Unless otherwise indicated, it will be assumed that all Shares
    represented by certificates delivered to the Depositary are being
    tendered. See Instruction 4.
 
                        DESCRIPTION OF RIGHTS TENDERED*
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
NAME(S) AND ADDRESS(ES) OF REGISTERED HOLDER(S)            RIGHTS CERTIFICATE(S) AND
 (PLEASE FILL IN, IF BLANK, EXACTLY AS NAME(S)                 RIGHT(S) TENDERED
      APPEAR(S) ON RIGHTS CERTIFICATE(S))           (ATTACH ADDITIONAL LIST, IF NECESSARY)
- -----------------------------------------------------------------------------------------------
                                                              TOTAL NUMBER
                                                                OF RIGHTS
                                                   RIGHTS    REPRESENTED BY
                                                 CERTIFICATE     RIGHTS        NUMBER OF RIGHTS
                                                 NUMBER(S)*  CERTIFICATE(S)**    TENDERED***
<S>                                              <C>         <C>               <C> 
- -----------------------------------------------------------------------------------------------
- -----------------------------------------------------------------------------------------------
- -----------------------------------------------------------------------------------------------
- -----------------------------------------------------------------------------------------------
- -----------------------------------------------------------------------------------------------
- -----------------------------------------------------------------------------------------------
                                                 TOTAL RIGHTS
</TABLE>
- --------------------------------------------------------------------------------
  * If the tendered Rights are represented by separate certificates,
    complete the certificate numbers of such Rights Certificates.
 ** Need not be completed by Book-Entry Shareholders.
 *** Unless otherwise indicated, it will be assumed that all Rights
     represented by certificates delivered to the Depositary are being
     tendered. See Instruction 4.
 
                                       4
<PAGE>
 
Ladies and Gentlemen:
 
  The undersigned hereby tenders to TK Acquisition Corporation, a Delaware
corporation ("Purchaser") and an indirect wholly owned subsidiary of Danaher
Corporation, a Delaware corporation ("Danaher"), the above-described shares of
Common Stock, $1.25 par value per share (the "Shares"), of Joslyn Corporation,
an Illinois corporation (the "Company"), and (unless and until the Purchaser
declares that the Rights Condition (as defined in the Offer to Purchase
described below) is satisfied), the associated Common Stock Purchase Rights,
(the "Rights") issued pursuant to the Rights Agreement, dated as of February
10, 1988, as amended as of September 2, 1994 (the "Rights Agreement"), between
the Company and The First National Bank of Chicago, an Illinois banking
corporation, as Rights Agent (the "Rights Agent"), at a purchase price of $32
per Share (and associated Right), net to the seller in cash without interest
thereon, upon the terms and subject to the conditions set forth in the Offer to
Purchase, dated July 24, 1995 (the "Offer to Purchase"), and in this Letter of
Transmittal (which together constitute the "Offer"). Unless the context
otherwise requires, all references to Shares shall include the associated
Rights, and all references to Rights shall include all benefits that may inure
to the shareholders of the Company or to holders of the Rights pursuant to the
Rights Agreement. The undersigned understands that Purchaser reserves the right
to transfer or assign, in whole or from time to time in part, to one or more of
its affiliates, the right to purchase all or any portion of the Shares and
Rights tendered pursuant to the Offer, receipt of which is hereby acknowledged.
 
  The undersigned understands that if the Distribution Date (as defined in the
Offer to Purchase) has occurred and certificates representing Rights (the
"Rights Certificates") have been distributed to holders of Shares prior to the
date of tender of the Shares tendered herewith, Rights Certificates
representing a number of Rights equal to the number of Shares being tendered
herewith must be delivered to the Depositary (as defined below) or, if
available, a Book-Entry Confirmation (as defined herein) received with respect
thereto, in order for the Shares tendered herewith to be validly tendered. If
the Distribution Date has occurred and Rights Certificates have not been
distributed prior to the time Shares and Rights are tendered herewith, the
undersigned agrees to deliver Rights Certificates representing a number of
Rights equal to the number of Shares tendered herewith to Bank of America
Illinois (the "Depositary") within five business days after the date such
Rights Certificates are distributed. A tender of Shares without Rights
Certificates constitutes an agreement by the tendering shareholder to deliver
Rights Certificates representing a number of Rights equal to the number of
Shares tendered pursuant to the Offer to the Depositary within five business
days after the date such Rights Certificates are distributed. The undersigned
understands that if the Rights Condition is not satisfied Purchaser reserves
the right to require that the Depositary receive such Rights Certificates prior
to accepting Shares for payment. In that event, payment for Shares tendered and
accepted for payment pursuant to the Offer will be made only after timely
receipt by the Depositary of, among other things, Rights Certificates, if
Rights Certificates have been distributed to holders of Shares.
 
  Subject to, and effective upon, acceptance for payment of the Shares tendered
herewith in accordance with the terms and subject to the conditions of the
Offer, the undersigned hereby sells, assigns and transfers to, or upon the
order of, Purchaser all right, title and interest in and to all of the Shares
that are being tendered hereby and any and all dividends, distributions
(including additional Shares) and rights (including the associated Rights)
declared, paid or issued with respect to the tendered Shares on or after July
21, 1995 and payable or distributable to the undersigned on a date prior to the
transfer to the name of Purchaser (or nominee or transferee of Purchaser) on
the Company's stock transfer records of the Shares tendered herewith (except
that if the Rights are redeemed by the Company's Board of Directors in
accordance with the terms of the Rights Agreement, tendering shareholders who
are holders of record as of the applicable record date will be entitled to
receive and retain the redemption price of $0.03333 per Right in accordance
with the Rights Agreement) (collectively, a "Distribution"), and irrevocably
constitutes and appoints the Depositary the true and lawful agent and attorney-
in-fact of the undersigned with respect to such Shares (and any Distributions)
with full power of substitution (such power of attorney being deemed to be an
irrevocable power coupled with an interest) to (a) deliver certificates for
such Shares (and any Distributions) or transfer ownership of such Shares (and
any Distributions) on the account books maintained by a Book-Entry Transfer
Facility, together in either case with appropriate evidences of transfer, to
the Depositary for the account of the
 
                                       5
<PAGE>
 
Purchaser, (b) present such Shares (and any Distributions) for transfer on the
books of the Company and (c) receive all benefits and otherwise exercise all
rights of beneficial ownership of such Shares (and any Distributions), all in
accordance with the terms and subject to the conditions of the Offer.
 
  The undersigned irrevocably appoints Steven M. Rales, Mitchell P. Rales and
Patrick W. Allender, and each of them, or any other designees of Purchaser, as
such shareholder's attorneys-in-fact and proxies, each with full power of
substitution, to the full extent of such shareholder's rights with respect to
the Shares tendered by such shareholder and accepted for payment by Purchaser
and with respect to any and all other Shares or other securities (including, if
applicable, the Rights) issued or issuable in respect of such Shares on or
after July 24, 1995. Such appointment will be effective upon the acceptance for
payment of such Shares by Purchaser in accordance with the terms of the Offer.
Upon such acceptance for payment, all prior powers of attorney and proxies
given by such shareholder with respect to such Shares (and such other shares
and securities) will be revoked without further action, and no subsequent
proxies may be given nor any subsequent written consents executed (and, if
given or executed, will not be deemed effective). The proxies (or other
designees of Purchaser) will be empowered to exercise all voting and other
rights of such shareholder as they in their sole discretion may deem proper at
any annual or special meeting of the Company's shareholders or any adjournment
or postponement thereof, by consent in lieu of any such meeting or otherwise.
Purchaser reserves the right to require that, in order for Shares and Rights to
be deemed validly tendered, immediately upon Purchaser's payment for such
Shares Purchaser must be able to exercise full voting rights with respect to
such Shares and Rights.
 
  The undersigned hereby represents and warrants that (a) the undersigned has
full power and authority to tender, sell, assign and transfer the Shares (and
any Distributions) tendered hereby and (b) when the Shares are accepted for
payment by Purchaser, Purchaser will acquire good, marketable and unencumbered
title to the Shares (and any Distributions), free and clear of all liens,
restrictions, charges and encumbrances, and the same will not be subject to any
adverse claim. The undersigned, upon request, shall execute and deliver any
signature guarantee or additional documents deemed by the Depositary or
Purchaser to be necessary or desirable to complete the sale, assignment and
transfer of the Shares (and any Distributions) tendered hereby. In addition,
the undersigned shall promptly remit and transfer to the Depositary for the
account of Purchaser any and all Distributions in respect of the Shares
tendered hereby, accompanied by appropriate documentation of transfer, and
pending such remittance or appropriate assurance thereof, Purchaser will be,
subject to applicable law, entitled to all rights and privileges as owner of
any such Distribution and may withhold the entire purchase price or deduct from
the purchase price the amount or value thereof, as determined by the Purchaser
in its sole discretion.
 
  No authority herein conferred or agreed to be conferred by this Letter of
Transmittal shall be affected by, and all such authority shall survive the
death or incapacity of, the undersigned. All obligations of the undersigned
hereunder shall be binding upon the heirs, executors, administrators, trustees
in bankruptcy, personal and legal representatives, successors and assigns of
the undersigned.
 
  Tenders of Shares (and the associated Rights) made pursuant to the Offer are
irrevocable, except that Shares (and the associated Rights) tendered pursuant
to the Offer may be withdrawn at any time prior to the Expiration Date (as
defined in the Offer to Purchase) and, unless theretofore accepted for payment
by the Purchaser pursuant to the Offer, may also be withdrawn at any time after
September 21, 1995. See Section 4 of the Offer to Purchase.
 
  The undersigned understands that tenders of Shares and Rights pursuant to any
of the procedures described in Section 3 of the Offer to Purchase and in the
instructions hereto will constitute a binding agreement between the undersigned
and the Purchaser upon the terms and subject to the conditions set forth in the
Offer, including the undersigned's representation and warranty that the
undersigned owns the Shares and Rights being tendered.
 
  Unless otherwise indicated herein under "Special Payment Instructions,"
please issue the check for the purchase price and/or return any certificate(s)
for Shares and Rights not tendered or not accepted for
 
                                       6
<PAGE>
 
payment in the name(s) of the registered holder(s) appearing under "Description
of Shares Tendered" and "Description of Rights Tendered", respectively.
Similarly, unless otherwise indicated herein under "Special Delivery
Instructions," please mail the check for the purchase price and/or any
certificate(s) for Shares and Rights not tendered or not accepted for payment
(and accompanying documents, as appropriate) to the address(es) of the
registered holder(s) appearing under "Description of Shares Tendered" and
"Description of Rights Tendered", respectively. In the event that both the
Special Delivery Instructions and the Special Payment Instructions are
completed, please issue the check for the purchase price and/or any
certificate(s) for Shares and Rights not tendered or accepted for payment in
the name of, and deliver such check and/or such certificates to, the person or
persons so indicated. Unless otherwise indicated herein under "Special Payment
Instructions," please credit any Shares and Rights tendered herewith by book-
entry transfer that are not accepted for payment by crediting the account at
the Book-Entry Transfer Facility designated above. The undersigned recognizes
that Purchaser has no obligation, pursuant to the Special Payment Instructions,
to transfer any Shares or Rights from the name(s) of the registered holder(s)
thereof if the Purchaser does not accept for payment any of the Shares or
Rights so tendered.
 
                                       7
<PAGE>
 
[_]CHECK HERE IF ANY OF THE CERTIFICATES REPRESENTING THE SHARES THAT YOU OWN
   HAVE BEEN LOST OR DESTROYED AND SEE INSTRUCTION 11.
 
  Number of shares represented by the lost or destroyed
  certificates: ___________________________________________
 
  Please fill in the remainder of this Letter of Transmittal.
 
 
   SPECIAL PAYMENT INSTRUCTIONS               SPECIAL DELIVERY INSTRUCTIONS
 (SEE INSTRUCTIONS 1, 5, 6 AND 7)           (SEE INSTRUCTIONS 1, 5, 6 AND 7)
 
 
  To be completed ONLY if certif-            To be completed ONLY if certif-
 icate(s) for Shares and Rights             icate(s) for Shares and Rights
 not tendered or not accepted for           not tendered or not accepted for
 payment and/or the check for the           payment and/or the check for the
 purchase price of Shares and               purchase price of Shares and
 Rights accepted for payment are            Rights accepted for payment are
 to be issued in the name of                to be sent to someone other than
 someone other than the under-              the undersigned or to the under-
 signed or if Shares or Rights              signed at an address other than
 tendered by book-entry transfer            that shown above.
 which are not accepted for pay-
 ment are to be returned by
 credit to an account maintained
 at a Book-Entry Transfer Facili-
 ty.
 
 Issue  [_] Check and/or [_] Certificates   Mail  [_] Check and/or  
 to:                                              [_] Certificates to:

 Name ____________________________          Name_____________________________
          (PLEASE PRINT)                             (PLEASE PRINT)
 Address _________________________        
 _________________________________          Address _________________________
                                            _________________________________
 _________________________________          _________________________________
        (INCLUDE ZIP CODE)                
                                                   (INCLUDE ZIP CODE)
    (TAXPAYER IDENTIFICATION OR           
     SOCIAL SECURITY NO.) (SEE                 (TAXPAYER IDENTIFICATION OR
    SUBSTITUTE FORM W-9 ON BACK                 SOCIAL SECURITY NO.) (SEE
              COVER)                           SUBSTITUTE FORM W-9 ON BACK
                                                         COVER)
                                          
                                          
                                         
                                         
                                         
                                         
                                         
                                         
 
 
                                       8
<PAGE>
 
 
                                   IMPORTANT:
                             SHAREHOLDERS SIGN HERE
              (ALSO COMPLETE SUBSTITUTE FORM W-9 ON REVERSE SIDE)
 
X__________________________________________________________________________Sign
X__________________________________________________________________________Here.
                           SIGNATURE(S) OF HOLDER(S)
 
Dated: ________________________________________________________________________
 
(Must be signed by the registered holder(s) exactly as name(s) appear(s) on
Share Certificate(s) or on a security position listing or by person(s)
authorized to become registered holders(s) by certificates and document
transmitted herewith. If signature is by trustees, executors, administrators,
guardians, attorneys-in-fact, officers of corporations or others acting in a
fiduciary or representative capacity, please provide the following information
and see Instruction 5.)
 
Name(s): ______________________________________________________________________
     _______________________________________________________________________
                                 (PLEASE PRINT)
 
Capacity (Full Title): ________________________________________________________
 
Address: ______________________________________________________________________
     _______________________________________________________________________
     _______________________________________________________________________
                               (INCLUDE ZIP CODE)
 
Daytime Telephone Number: (         )_________________________________________
                          (AREA CODE)
 
                                  (SEE SUBSTITUTE FORM W-9 ON REVERSE SIDE)
Tax Identification or Social Security No.:
 
                           GUARANTEE OF SIGNATURE(S)
                   (IF REQUIRED -- SEE INSTRUCTIONS 1 AND 5)
 
Authorized Signature: _________________________________________________________
 
Name: _________________________________________________________________________
 
Name of Firm: _________________________________________________________________
 
Address: ______________________________________________________________________
     _______________________________________________________________________
     _______________________________________________________________________
                               (INCLUDE ZIP CODE)
 
Daytime Telephone Number: (         )__________________________________________
                          (AREA CODE)
 
Dated: _________________ , 1995
 
 
                                       9
<PAGE>
 
                                  INSTRUCTIONS
 
             FORMING PART OF THE TERMS AND CONDITIONS OF THE OFFER
 
  1. GUARANTEE OF SIGNATURES. No signature guarantee is required on this Letter
of Transmittal (a) if this Letter of Transmittal is signed by the registered
holder(s) of Shares (which term, for purposes of this document, shall include
any participant in a Book-Entry Transfer Facility whose name appears on a
security position listing as the owner of Shares) tendered herewith, unless
such holder(s) has completed either the box entitled "Special Payment
Instructions" or the box entitled "Special Delivery Instructions" above, or (b)
if such Shares and/or Rights are tendered for the account of a firm which is a
bank, broker, dealer, credit union, savings association or other entity which
is a member in good standing of a recognized Medallion Program approved by the
Securities Transfer Association (each of the foregoing being referred to as an
"Eligible Institution"). In all other cases, all signatures on this Letter of
Transmittal must be guaranteed by an Eligible Institution. See Instruction 5 of
this Letter of Transmittal.
 
  2. REQUIREMENTS OF TENDER. This Letter of Transmittal is to be completed by
shareholders either if certificates are to be forwarded herewith or, unless an
Agent's Message is utilized, if tenders are to be made pursuant to the
procedure for tender by book-entry transfer set forth in Section 3 of the Offer
to Purchase. Certificates for all physically tendered Shares or timely
confirmation (a "Book-Entry Confirmation") of a book-entry transfer of such
Shares into the Depositary's account at a Book-Entry Transfer Facility, as well
as a properly completed and duly executed Letter of Transmittal (or a facsimile
hereof), with any required signature guarantees, or an Agent's Message in
connection with a book-entry transfer, and any other documents required by this
Letter of Transmittal, must be received by the Depositary at one of its
addresses set forth herein prior to the Expiration Date (as defined in Section
1 of the Offer to Purchase) and, unless and until the Purchaser declares that
the Rights Condition (as defined in the Offer to Purchase) is satisfied, Rights
Certificates or timely confirmation of a book-entry transfer of Rights into the
Depositary's account at a Book-Entry Transfer Facility, if available (together
with, if Rights are forwarded separately from Shares, any required signature
guarantees, or an Agent's Message in the case of a book-entry delivery, and any
other documents required by this Letter of Transmittal), must be received by
the Depositary at one of its addresses set forth herein prior to the Expiration
Date or, if later, within five business days after the date such Rights
Certificates are distributed.
 
  Shareholders whose certificates for Shares or Rights are not immediately
available (including Rights Certificates that have not yet been distributed by
the Company) or who cannot deliver their certificates for Shares or Rights and
all other required documents to the Depositary prior to the Expiration Date or
who cannot complete the procedure for delivery by book-entry transfer on a
timely basis may tender their Shares and Rights by properly completing and duly
executing a Notice of Guaranteed Delivery pursuant to the guaranteed delivery
procedure set forth in Section 3 of the Offer to Purchase. Pursuant to such
procedure: (i) such tender must be made by or through an Eligible Institution;
(ii) a properly completed and duly executed Notice of Guaranteed Delivery,
substantially in the form made available by the Purchaser, must be received by
the Depositary on or prior to the Expiration Date; (iii) the certificates (or a
Book-Entry Confirmation) representing all tendered Shares, in proper form for
transfer, in each case together with the Letter of Transmittal (or a facsimile
thereof), properly completed and duly executed, with any required signature
guarantees (or, in the case of a book-entry delivery, an Agent's Message) and
any other documents required by this Letter of Transmittal, must be received by
the Depositary within five New York Stock Exchange, Inc. ("NYSE") trading days
after the date of execution of such Notice of Guaranteed Delivery; and (iv)
unless and until the Purchaser declares that the Rights Condition is satisfied,
the Rights Certificates, if issued, representing the appropriate number of
Rights or a Book Entry-Confirmation, if available, in each case together with
any required signature guarantees (or, in the case of a book-entry delivery, an
Agent's Message) and any other documents required by this Letter of
Transmittal, must be received by the Depositary within five NYSE trading days
after the date of execution of such Notice of Guaranteed Delivery or, if later,
five NYSE trading days after Rights Certificates are distributed to
shareholders, all as provided in Section 3 of the Offer to Purchase. If Share
Certificates and Rights Certificates are forwarded separately to the
Depositary,
 
                                       10
<PAGE>
 
a properly completed and duly executed Letter of Transmittal must accompany the
Share Certificates only; the Rights Certificates may be mailed to the
Depositary without including a Letter of Transmittal. For your convenience, a
second return envelope has been enclosed for return of Rights Certificates in
the event Rights Certificates have been distributed.
 
  THE METHOD OF DELIVERY OF SHARE CERTIFICATES OR OF RIGHTS CERTIFICATES AND
ALL OTHER REQUIRED DOCUMENTS, INCLUDING DELIVERY THROUGH ANY BOOK-ENTRY
TRANSFER FACILITY, IS AT THE OPTION AND RISK OF THE TENDERING SHAREHOLDER. IF
DELIVERY IS BY MAIL, REGISTERED MAIL WITH RETURN RECEIPT REQUESTED, PROPERLY
INSURED, IS RECOMMENDED. IN ALL CASES, SUFFICIENT TIME SHOULD BE ALLOWED TO
ENSURE TIMELY DELIVERY.
 
  No alternative, conditional or contingent tenders will be accepted and no
fractional Shares and Rights will be purchased. All tendering shareholders, by
execution of this Letter of Transmittal (or a facsimile hereof), waive any
right to receive any notice of the acceptance of their Shares and Rights for
payment.
 
  3. INADEQUATE SPACE. If the space provided herein is inadequate, the
certificate numbers and/or the number of Shares and Rights and any other
required information should be listed on a separate signed schedule attached
hereto.
 
  4. PARTIAL TENDERS. (Not Applicable to shareholders who tender by book-entry
transfer) If fewer than all the Shares evidenced by any certificate submitted
are to be tendered, fill in the number of Shares which are to be tendered in
the box entitled "Number of Shares Tendered." If fewer than all the Rights
evidenced by any Rights Certificates submitted are to be tendered, fill in the
number of Rights which are to be tendered in the box entitled "Number of Rights
Tendered." In such cases, new certificates for the Shares or Rights that were
evidenced by your old certificates, but which were not tendered by you, will be
sent to you, unless otherwise provided in the appropriate box on this Letter of
Transmittal, as soon as practicable after the Expiration Date. All Shares and
Rights represented by certificates delivered to the Depositary will be deemed
to have been tendered unless otherwise indicated.
 
  5. SIGNATURES ON LETTER OF TRANSMITTAL, STOCK POWERS AND ENDORSEMENTS. If
this Letter of Transmittal is signed by the registered holder(s) of the Shares
and Rights tendered hereby, the signature(s) must correspond with the name(s)
as written on the face of the certificate(s) without alteration, enlargement or
any change whatsoever.
 
  If any of the Shares and Rights tendered hereby are owned of record by two or
more joint owners, all such owners must sign this Letter of Transmittal.
 
  If any of the tendered Shares and Rights are registered in different names on
several certificates, it will be necessary to complete, sign and submit as many
separate Letters of Transmittal as there are different registrations of
certificates.
 
  If this Letter of Transmittal or any certificates or stock powers are signed
by trustees, executors, administrators, guardians, attorneys-in-fact, officers
of corporations or others acting in a fiduciary or representative capacity,
such persons should so indicate when signing, and proper evidence satisfactory
to the Purchaser of their authority to so act must be submitted.
 
  When this Letter of Transmittal is signed by the registered owner(s) of the
Shares and Rights listed and transmitted hereby, no endorsements of
certificates or separate stock powers are required unless payment is to be made
to, or certificates for Shares or Rights not tendered or not purchased are to
be issued in the name of, a person other than the registered holder(s).
Signatures on such certificates or stock powers must be guaranteed by an
Eligible Institution.
 
                                       11
<PAGE>
 
  If this Letter of Transmittal is signed by a person other than the registered
owner(s) of the certificate(s) listed, the certificate(s) must be endorsed or
accompanied by appropriate stock powers, in either case signed exactly as the
name(s) of the registered holder(s) appear on the certificate(s). Signatures on
such certificates and stock powers must be guaranteed by an Eligible
Institution, unless the signature is that of an Eligible Institution.
 
  Unless and until the Purchaser declares the Rights Condition to be satisfied,
if Rights Certificates have been distributed to holders of Shares, such holders
are required to tender Rights Certificate(s) representing a number of Rights
equal to the number of Shares tendered in order to effect a valid tender of
such Shares. It is necessary that shareholders follow all signature
requirements of this Instruction 5 with respect to the Rights in order to
tender such Rights. For your convenience, a second return envelope is enclosed
for return of Rights Certificates in the event Rights Certificates have been
distributed.
 
  6. STOCK TRANSFER TAXES. Except as otherwise provided in this Instruction 6,
Purchaser will pay any stock transfer taxes with respect to the purchase of
Shares and Rights pursuant to the Offer. If, however, payment of the purchase
price is to be made to, or if certificate(s) for Shares and Rights not tendered
or accepted for payment are to be registered in the name of, any person other
than the registered owner(s), or if tendered certificate(s) are registered in
the name of any person other than the person(s) signing this Letter of
Transmittal, the amount of any stock transfer taxes (whether imposed on the
registered owner(s) or such person) payable on account of the transfer to such
person will be deducted from the purchase price unless satisfactory evidence of
the payment of such taxes, or an exemption therefrom, is submitted.
 
  7. SPECIAL PAYMENT AND DELIVERY INSTRUCTIONS. If a check is to be issued in
the name of, and/or certificates for Shares and Rights not tendered or not
accepted for payment are to be issued or returned to, a person other than the
signer of this Letter of Transmittal or if a check and/or such certificates are
to be returned to a person other than the person(s) signing this Letter of
Transmittal or to an address other than that shown in this Letter of
Transmittal, the appropriate boxes on this Letter of Transmittal must be
completed. A shareholder who tenders by book-entry transfer may request that
Shares and/or Rights not accepted for payment be credited to such account
maintained at a Book-Entry Transfer Facility as such shareholder may designate
under "Special Payment Instructions." If no such instructions are given, such
Shares or Rights not accepted for payment will be returned by crediting the
account at the Book-Entry Transfer Facility designated above.
 
  8. WAIVER OF CONDITIONS. The conditions of the Offer may be waived by
Purchaser in whole or in part at any time and from time to time in its sole
discretion.
 
  9. BACKUP WITHHOLDING; SUBSTITUTE FORM W-9. Under U.S. Federal income tax
law, a shareholder whose tendered Shares or Rights are accepted for payment is
required to provide the Depositary with such shareholder's correct taxpayer
identification number ("TIN"), generally the shareholder's social security or
federal employer identification number, and certain other information, on
Substitute Form W-9 below. If the Depositary is not provided with the correct
TIN, the Internal Revenue Service may subject the shareholder or other payee to
a $50 penalty. In addition, payments that are made to such shareholder or other
payee with respect to Shares or Rights purchased pursuant to the Offer may be
subject to 31% backup withholding.
 
  Certain shareholders (including, among others, all corporations and certain
foreign individuals) are not subject to these backup withholding and reporting
requirements. In order for a foreign individual to qualify as an exempt
recipient, the shareholder must submit a Form W-8, signed under penalties of
perjury, attesting to that individual's exempt status. A Form W-8 can be
obtained from the Depositary. See the enclosed "Guidelines for Certification of
Taxpayer Identification Number on Substitute Form W-9" for more instructions.
 
                                       12
<PAGE>
 
  If backup withholding applies, the Depositary is required to withhold 31% of
any such payments made to the shareholder or other payee. Backup withholding is
not an additional tax. Rather, the tax liability of persons subject to backup
withholding will be reduced by the amount of tax withheld. If withholding
results in an overpayment of taxes, a refund may be obtained from the Internal
Revenue Service.
 
  The box in Part 3 of the Substitute Form W-9 may be checked if the tendering
shareholder 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, the
shareholder or other payee must also complete the Certificate of Awaiting
Taxpayer Identification Number below in order to avoid backup withholding.
Notwithstanding that the box in Part 3 is checked and the Certificate of
Awaiting Taxpayer Identification Number is completed, the Depositary will
withhold 31% of all payments made prior to the time a properly certified TIN is
provided to the Depositary.
 
  The shareholder is required to give the Depositary the TIN (e.g., social
security number or employer identification number) of the record owner of the
Shares and Rights or of the last transferee appearing on the transfers attached
to, or endorsed on, the Shares and Rights. If the Shares or Rights are in more
than one name or are not in the name of the actual owner, consult the enclosed
"Guidelines for Certification of Taxpayer Identification Number on Substitute
Form W-9" for additional guidance on which number to report.
 
  10. REQUESTS FOR ASSISTANCE OR ADDITIONAL COPIES. Questions or requests for
assistance may be directed to the Dealer Manager or the Information Agent at
their respective addresses and telephone numbers set forth below. Additional
copies of the Offer to Purchase, this Letter of Transmittal and the Notice of
Guaranteed Delivery may also be obtained from the Information Agent or from
brokers, dealers, commercial banks or trust companies.
 
  11. LOST, DESTROYED OR STOLEN CERTIFICATES. If any certificate representing
Shares or Rights has been lost, destroyed or stolen, the shareholder should
promptly notify the Depositary by checking the box immediately preceding
special payment/special delivery instructions and indicating the number of
Shares lost. The shareholder will then be instructed as to the steps that must
be taken in order to replace the certificate. This Letter of Transmittal and
related documents cannot be processed until the procedures for replacing lost
or destroyed certificates have been followed.
 
  IMPORTANT: THIS LETTER OF TRANSMITTAL (OR A FACSIMILE HEREOF), TOGETHER WITH
CERTIFICATES OR CONFIRMATION OF BOOK-ENTRY TRANSFER OR THE NOTICE OF GUARANTEED
DELIVERY, AND ALL OTHER REQUIRED DOCUMENTS, MUST BE RECEIVED BY THE DEPOSITARY
PRIOR TO THE EXPIRATION DATE (AS DEFINED IN THE OFFER TO PURCHASE).
 
                                       13
<PAGE>
 
                 TO BE COMPLETED BY ALL TENDERING SHAREHOLDERS
                              (SEE INSTRUCTION 9)
 
 
                     PAYER'S NAME: BANK OF AMERICA ILLINOIS
 
- --------------------------------------------------------------------------------
 SUBSTITUTE
 
 
 
 FORM W-9                    PART 1 -- PLEASE           _____________________
                             PROVIDE YOUR TIN IN           SOCIAL SECURITY
                             THE BOX AT RIGHT AND               NUMBER
                             CERTIFY BY SIGNING AND
 DEPARTMENT OF THE TREASURY  DATING BELOW
 INTERNAL REVENUE SERVICE                               OR                      
                                                                              
                                                        
 PAYER'S REQUEST FOR                                    _____________________  
 TAXPAYER IDENTIFICATION                                  EMPLOYER ID NUMBER
 NUMBER ("TIN")                                         
                                                        
                                                       
                                                       
                                                       
                            
                            
 
- --------------------------------------------------------------------------------
 
 PART 2--CERTIFICATION--Under penalties of perjury, I certify that:
 (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
 (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 interest or dividends, or (c) the
     IRS has notified me that I am no longer subject to backup withholding.
 
 CERTIFICATION INSTRUCTIONS--You must cross out item (2) above if you have
 been notified by the IRS that you are currently subject to backup
 withholding because of under-reporting 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 that
 you are no longer subject to backup withholding, do not cross out such
 Item (2).
 
- --------------------------------------------------------------------------------
 SIGNATURE ________________  DATE ________________      PART 3--AWAITING
                                                        TIN [_]
 
 
NOTE:   FAILURE TO COMPLETE AND RETURN THIS FORM MAY RESULT IN BACKUP
        WITHHOLDING OF 31% OF ANY PAYMENTS MADE TO YOU PURSUANT TO THE OFFER.
        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 SUBSTITUTE FORM W-9.
 
                                       14
<PAGE>
 
 
             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 (1) 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 (2) I intend to mail or deliver an application
 in the near future. I understand that if I do not provide a taxpayer
 identification number by the time of payment, 31% of all reportable
 payments made to me will be withheld but that such amounts will be
 refunded to me if I then provide a Taxpayer Identification Number within
 sixty (60) days.
 
 Signature: ___________________________  Date:  ___________________________
 
 
  Questions and requests for assistance may be directed to the Information
Agent or the Dealer Manager at their respective addresses and telephone numbers
listed below. Additional copies of the Offer to Purchase, the Letter of
Transmittal and other tender offer materials may be obtained from the
Information Agent as set forth below, and will be furnished promptly at the
Purchaser's expense. You may also contact your broker, dealer, commercial bank,
trust company or other nominee for assistance concerning the Offer.
 
                    The Information Agent for the Offer is:
 
                             D.F. KING & CO., INC.
                                77 Water Street
                            New York, New York 10005
                         (212) 269-5550 (Call Collect)
                               or (800) 758-7358
 
                      The Dealer Manager for the Offer is:
 
                              MERRILL LYNCH & CO.
                             World Financial Center
                                  North Tower
                         New York, New York 10281-1305
                         (212) 236-4565 (Call Collect)
 
 
                                       15

<PAGE>
                                                                EXHIBIT 11(a)(3)
 
                         NOTICE OF GUARANTEED DELIVERY
 
                                      FOR
 
                        TENDER OF SHARES OF COMMON STOCK
            (INCLUDING THE ASSOCIATED COMMON STOCK PURCHASE RIGHTS)
 
                                       OF
 
                               JOSLYN CORPORATION
 
  This notice of Guaranteed Delivery or one substantially equivalent hereto
must be used to accept the Offer (as defined below) if certificates
representing shares of Common Stock, par value $1.25 per share (the "Shares"),
of Joslyn Corporation, an Illinois corporation (the "Company"), and/or if
applicable, certificates for the associated Common Stock Purchase Rights (the
"Rights") issued pursuant to the Rights Agreement, dated as of February 10,
1988, as amended as of September 2, 1994, between the Company and The First
National Bank of Chicago, an Illinois banking corporation, as Rights Agent (as
amended, the "Rights Agreement") are not immediately available (including, if
the Distribution Date (as defined in the Offer to Purchase (as defined below)
has occurred), because certificates for Rights have not yet been distributed)
or time will not permit all required documents to reach Bank of America
Illinois (the "Depositary") on or prior to the Expiration Date (as defined in
the Offer to Purchase), or, in the case of Shares and, if available, Rights,
the procedures for delivery by book-entry transfer cannot be completed on a
timely basis. This Notice of Guaranteed Delivery may be delivered by hand or
sent by facsimile transmission or mail to the Depositary. See Section 3 of the
Offer to Purchase.
 
                        THE DEPOSITARY FOR THE OFFER IS:
                            BANK OF AMERICA ILLINOIS
 
         By Mail:                By Facsimile          By Hand or Overnight
 Bank of America Illinois       Transmission:                 Courier:
Corporate Trust Depositary     (312) 923-0271         Bank of America Illinois
 P.O. Box 805857 Chicago,                              231 LaSalle Street 19
       IL 60680-4120             To Confirm:         Floor Window(Clark Street
                               (800) 962-9324         Side) Chicago, IL 60697
                                                          Attn: Corporate
                                                      Trust Operations Window
 
                                               
                                               
 
  DELIVERY OF THIS NOTICE OF GUARANTEED DELIVERY TO AN ADDRESS OTHER THAN AS
SET FORTH ABOVE OR TRANSMISSION OF INSTRUCTIONS VIA A FACSIMILE TRANSMISSION TO
A NUMBER OTHER THAN AS SET FORTH ABOVE WILL NOT CONSTITUTE A VALID DELIVERY.
 
  THIS NOTICE OF GUARANTEED DELIVERY IS NOT TO BE USED TO GUARANTEE SIGNATURES.
IF A SIGNATURE ON A LETTER OF TRANSMITTAL IS REQUIRED TO BE GUARANTEED BY AN
"ELIGIBLE INSTITUTION" UNDER THE INSTRUCTIONS THERETO, SUCH SIGNATURE GUARANTEE
MUST APPEAR IN THE APPLICABLE SPACE PROVIDED IN THE SIGNATURE BOX ON THE LETTER
OF TRANSMITTAL.
<PAGE>
 
Ladies and Gentlemen:
 
  The undersigned hereby tenders to TK Acquisition Corporation, a Delaware
corporation ("Purchaser") and an indirect wholly owned subsidiary of Danaher
Corporation, upon the terms and subject to the conditions set forth in the
Offer to Purchase, dated July 24, 1995 (the "Offer to Purchase"), and in the
related Letter of Transmittal (which together constitute the "Offer"), receipt
of each of which is hereby acknowledged, the number of Shares and the number of
Rights indicated below pursuant to the guaranteed delivery procedures set forth
in Section 3 of the Offer to Purchase.
                                                                                
                                                                                
Number of Shares: _____________Shares     Names(s) of Record Holder(s): _______ 
                                          _____________________________________ 
Number of Rights: _____________Rights     Address(es): ________________________ 
                                          _____________________________________ 
Certificate No(s). (if available): __     _____________________________________ 
_____________________________________                                           
_____________________________________     Daytime Area Code and Telephone       
                                          Number(s):                            
                                          _____________________________________ 
If Share(s) and Right(s) will be          Signature(s): _______________________ 
tendered by book-entry transfer,          _____________________________________ 
check one box.                            _____________________________________
[_] ________________________
[_] ________________________
[_] ________________________
Account No.  _______________
                                      
 
                     THE GUARANTEE BELOW MUST BE COMPLETED
 
                                   GUARANTEE
                    (NOT TO BE USED FOR SIGNATURE GUARANTEE)
 
  The undersigned, a firm that is a bank, broker, dealer, credit union, savings
association or other entity which is a member in good standing of the
Securities Transfer Agents Medallion Program, hereby (1) represents that the
tender of Shares and/or Rights effected hereby complies with Rule 14e-4 under
the Securities and Exchange Act of 1934, as amended, and (2) guarantees to
deliver to the Depositary, at one of its addresses set forth above, the
certificates representing all tendered Shares and/or Rights, in proper form for
transfer, or, in the case of Shares and, if available, Rights, a Book-Entry
Confirmation (as defined in the Offer to Purchase), together with a properly
completed and duly executed Letter of Transmittal (or facsimile thereof), with
any required signature guarantees, or, in the case of book-entry transfer of
Shares and, if available, Rights, an Agent's Message (as defined in the Offer
to Purchase), and any other documents required by the Letter of Transmittal
within (a) in the case of Shares, five New York Stock Exchange, Inc. ("NYSE")
trading days after the date of execution to this Notice of Guaranteed Delivery
or (b) in the case of Rights, a period ending on the later of (i) five NYSE
trading days after the date of execution of this Notice of Guaranteed Delivery
and (ii) five business days after the date certificates for Rights are
distributed to holders of Shares.
 
Name of Firm: _______________________     _____________________________________
                                                 (AUTHORIZED SIGNATURE)
Address: ____________________________
_____________________________________     Title: ______________________________
Area Code and                             Name: _______________________________
Telephone Number: ___________________
                                          _____________________________________
                                                 (PLEASE TYPE OR PRINT)
Date: _______________________________
 
         NOTE: DO NOT SEND CERTIFICATES FOR SHARES OR RIGHTS WITH THIS
             NOTICE OF GUARANTEED DELIVERY. CERTIFICATES FOR SHARES
           OR RIGHTS SHOULD BE SENT WITH YOUR LETTER OF TRANSMITTAL.
 
                                       2

<PAGE>
                                                                EXHIBIT 11(a)(4)

 
                           OFFER TO PURCHASE FOR CASH
                     ALL OUTSTANDING SHARES OF COMMON STOCK
            (INCLUDING THE ASSOCIATED COMMON STOCK PURCHASE RIGHTS)
 
                                       OF
 
                               JOSLYN CORPORATION
 
                                       AT
 
                               $32 NET PER SHARE
 
                                       BY
 
                           TK ACQUISITION CORPORATION
                     AN INDIRECT WHOLLY OWNED SUBSIDIARY OF
 
                              DANAHER CORPORATION
 
   THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK
 CITY TIME, ON FRIDAY, AUGUST 18, 1995, UNLESS THE OFFER IS EXTENDED.
 
 
                                                                   July 24, 1995
 
To Brokers, Dealers, Commercial Banks, 
  Trust Companies and Other Nominees:
 
  We have been appointed by TK Acquisition Corporation, a Delaware corporation
(the "Purchaser") and an indirect wholly owned subsidiary of Danaher
Corporation, a Delaware corporation ("Parent"), to act as Dealer Manager in
connection with the Purchaser's offer to purchase for cash all the outstanding
shares of Common Stock, par value $1.25 per share (the "Shares"), of Joslyn
Corporation, an Illinois corporation (the "Company"), and (unless and until the
Purchaser declares the Rights Condition (as defined in the Offer to Purchase)
is satisfied) the associated Common Stock Purchase Rights (the "Rights") issued
pursuant to the Rights Agreement, dated as of February 10, 1988, as amended as
of September 2, 1994 (the "Rights Agreement"), between the Company and The
First National Bank of Chicago, an Illinois banking corporation, as Rights
Agent, at a purchase price of $32 per Share (and associated Right), net to the
seller in cash without interest thereon, upon the terms and subject to the
conditions set forth in the Offer to Purchase, dated July 24, 1995 (the "Offer
to Purchase"), and in the related Letter of Transmittal (which together
constitute the "Offer") enclosed herewith. Unless and until the Purchaser
declares that the Rights Condition is satisfied, holders of Shares will be
required to tender one Right for each Share tendered in order to effect a valid
tender of such Share. If the Distribution Date (as defined in the Offer to
Purchase) has not occurred prior to the time Shares are tendered pursuant to
the Offer, a tender of Shares will constitute a tender of the associated
Rights. If the Distribution Date has occurred and certificates representing
Rights ("Rights Certificates") have been distributed by the Company to holders
of Shares, such holders of Shares shall be required to tender Rights
Certificates representing a number of Rights equal to the number of Shares
being tendered in order to effect valid tender of such Shares. Holders of
Shares and Rights whose certificates for such Shares (the "Share Certificates")
and, if applicable, Rights Certificates are not immediately available or who
cannot deliver their Share Certificates or, if applicable, their Rights
Certificates, and all other required documents to the Depositary (as defined
below) prior to the Expiration Date (as defined in the Offer to Purchase), or
who cannot complete the procedures for book-entry transfer on a timely basis,
must tender their Shares and Rights according to the guaranteed delivery
procedures set forth in Section 3 of the Offer to Purchase. Unless the context
otherwise requires, all references to Shares shall include the associated
Rights. All references to the Rights shall include all benefits that may inure
to shareholders of the Company or to holders of Rights pursuant to the Rights
Agreement.
<PAGE>
 
  Please furnish copies of the enclosed materials to those of your clients for
whose accounts you hold Shares registered in your name or in the name of your
nominee.
 
  The Offer is conditioned upon, among other things: (1) there being validly
tendered and not properly withdrawn prior to the expiration of the Offer that
number of Shares which, when aggregated with the 613,550 Shares currently owned
by Parent, represent at least two-thirds of the total number of outstanding
Shares determined on a fully diluted basis on the date of purchase; (2) the
Rights having been redeemed by the Company's Board of Directors or Purchaser
being satisfied, in its sole discretion, that the Rights have been invalidated
or are otherwise inapplicable to the Offer and the Proposed Merger; and (3)
Purchaser being satisfied, in its sole discretion, that after consummation of
the Offer, the restrictions on business combinations as defined and contained
in Sections 7.85 and 11.75 of the Illinois Business Corporation Act will not
apply to the Proposed Merger. The Offer is also subject to other terms and
conditions, including the expiration or termination of the applicable antitrust
waiting period. See the Introduction and Sections 1, 14 and 15 of the Offer to
Purchase.
 
  Enclosed herewith for your information and forwarding to your clients are
copies of the following documents:
 
    1.The Offer to Purchase, dated July 24, 1995.
 
    2.The blue Letter of Transmittal to tender Shares for your use and for
  the information of your clients. Facsimile copies of the Letter of
  Transmittal may be used to tender Shares.
 
    3.The gray Notice of Guaranteed Delivery for Shares and Rights to be used
  to accept the Offer if Share Certificates or Rights Certificates are not
  immediately available or if such certificates and all other required
  documents cannot be delivered to Bank of America Illinois (the
  "Depositary") by the Expiration Date or if the procedures for book-entry
  transfer cannot be completed by the Expiration Date.
 
    4.A green printed form of letter which may be sent to your clients for
  whose accounts you hold Shares registered in your name or in the name of
  your nominee, with space provided for obtaining such clients' instructions
  with regard to the Offer.
 
    5.Guidelines of the Internal Revenue Service for Certification of
  Taxpayer Identification Number on Substitute Form W-9.
 
    6.A return envelope addressed to Bank of America Illinois, the
  Depositary.
 
  YOUR PROMPT ACTION IS REQUESTED. WE URGE YOU TO CONTACT YOUR CLIENTS AS
PROMPTLY AS POSSIBLE. PLEASE NOTE THAT THE OFFER AND WITHDRAWAL RIGHTS EXPIRE
AT 12:00 MIDNIGHT, NEW YORK CITY TIME, ON AUGUST 18, 1995 UNLESS THE OFFER IS
EXTENDED.
 
  In order to take advantage of the Offer, (i) a duly executed and properly
completed Letter of Transmittal and any required signature guarantees, or an
Agent's Message (as defined in the Offer to Purchase) in connection with a
book-entry delivery of Shares or Rights, and other required documents should be
sent to the Depositary, and (ii) either Share Certificates (and if applicable,
Rights Certificates) representing the tendered Shares (and, if applicable,
tendered Rights) should be delivered to the Depositary, or such Shares (and, if
applicable, tendered Rights) should be tendered by book-entry transfer into the
Depositary's account maintained at one of the Book-Entry Transfer Facilities
(as described in the Offer to Purchase), all in accordance with the
instructions set forth in the Letter of Transmittal and the Offer to Purchase.
 
  If holders of Shares wish to tender, but it is impracticable for them to
forward their Share Certificates or, if applicable, Rights Certificates or
other required documents on or prior to the Expiration Date or to comply with
the book-entry transfer procedures on a timely basis, a tender may be effected
by following the guaranteed delivery procedures specified in Section 3 of the
Offer to Purchase.
 
                                       2
<PAGE>
 
  The Purchaser will not pay any commissions or fees to any broker, dealer or
other person (other than the Dealer Manager, the Depositary and D.F. King &
Co., Inc. (the "Information Agent") (as described in the Offer to Purchase))
for soliciting tenders of Shares pursuant to the Offer. The Purchaser will,
however, upon request, reimburse you for customary clerical and mailing
expenses incurred by you in forwarding any of the enclosed materials to your
clients. The Purchaser will pay or cause to be paid any stock transfer taxes
payable on the transfer of Shares to it, except as otherwise provided in
Instruction 6 of the Letter of Transmittal.
 
  Any inquiries you may have with respect to the Offer should be addressed to
Merrill Lynch, Pierce, Fenner & Smith Incorporated, the Dealer Manager, or the
Information Agent, at their respective addresses and telephone numbers set
forth on the back cover of the Offer to Purchase. Additional copies of the
enclosed materials may be obtained from the Information Agent.
 
                                          Very truly yours,
 
                                          Merrill Lynch, Pierce, Fenner &
                                          Smith
                                                  Incorporated
 
  NOTHING CONTAINED HEREIN OR IN THE ENCLOSED DOCUMENTS SHALL CONSTITUTE YOU OR
ANY OTHER PERSON THE AGENT OF THE PURCHASER, THE PARENT, THE DEALER MANAGER,
THE COMPANY, THE DEPOSITARY OR THE INFORMATION AGENT, OR ANY AFFILIATE OF ANY
OF THEM, OR AUTHORIZE YOU OR ANY OTHER PERSON TO MAKE ANY STATEMENT OR USE ANY
DOCUMENT ON BEHALF OF ANY OF THEM IN CONNECTION WITH THE OFFER OTHER THAN THE
ENCLOSED DOCUMENTS AND THE STATEMENTS CONTAINED THEREIN.
 
                                       3

<PAGE>
                                                                EXHIBIT 11(a)(5)

 
                           OFFER TO PURCHASE FOR CASH
                     ALL OUTSTANDING SHARES OF COMMON STOCK
            (INCLUDING THE ASSOCIATED COMMON STOCK PURCHASE RIGHTS)
 
                                       OF
 
                               JOSLYN CORPORATION
 
                                       AT
 
                               $32 NET PER SHARE
 
                                       BY
 
                           TK ACQUISITION CORPORATION
                     AN INDIRECT WHOLLY OWNED SUBSIDIARY OF
 
                              DANAHER CORPORATION
 
 
         THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT,
 NEW YORK CITY TIME, ON FRIDAY, AUGUST 18, 1995, UNLESS THE OFFER IS EXTENDED.
 
 
                                                                   July 24, 1995
To Our Clients:
 
  Enclosed for your consideration is an Offer to Purchase dated July 24, 1995
(the "Offer to Purchase"), and the related Letter of Transmittal relating to an
offer by TK Acquisition Corporation, a Delaware corporation ("Purchaser") and
an indirect wholly owned subsidiary of Danaher Corporation, a Delaware
corporation ("Danaher"), to purchase all of the outstanding shares of Common
Stock, $1.25 par value per share (the "Shares"), of Joslyn Corporation, an
Illinois corporation (the "Company"), and (unless and until the Purchaser
declares that the Rights Condition (as defined in the Offer to Purchase) is
satisfied) the associated Common Stock Purchase Rights (the "Rights") issued
pursuant to the Rights Agreement, dated as of February 10, 1988, as amended as
of September 2, 1994, (the "Rights Agreement"), between the Company and The
First National Bank of Chicago, an Illinois banking corporation, as Rights
Agent, at a purchase price of $32 per Share (and associated Right), net to the
seller in cash without interest thereon, upon the terms and subject to the
conditions set forth in the Offer to Purchase and in the related Letter of
Transmittal (which together constitute the "Offer"). Unless the context
requires otherwise, all references to "Shares" shall be deemed to refer also to
the associated Rights. We are the holder of record of Shares held by us for
your account. A tender of such Shares can be made only by us as the holder of
record and pursuant to your instructions. The Letter of Transmittal is
furnished to you for your information only and cannot be used by you to tender
Shares held by us for your account.
 
  Unless and until the Purchaser declares that the Rights Condition (as defined
below) is satisfied, if certificates representing Rights (the "Rights
Certificates") have been distributed to holders of Shares, such holders are
required to tender Rights Certificate(s) representing a number of Rights equal
to the number of Shares being tendered in order to effect a valid tender of
such Shares. Based on the Company's filings with the Securities and Exchange
Commission (the "Commission"), until the Distribution Date (as defined in the
Offer to Purchase), the surrender for transfer of any of the certificates
representing Shares (the "Share Certificates") will also constitute the
surrender for transfer of the Rights associated with the Shares represented by
such Share Certificates. Based on the Company's filings with the Commission, as
soon as practicable following the Distribution Date, the Rights Certificates
will be mailed to holders of record of Shares as of the close of business on
the Distribution Date; after the Distribution Date, such separate Rights
Certificates alone will evidence the Rights. See Section 3 of the Offer to
Purchase.
<PAGE>
 
  We request instructions as to whether you wish to have us tender on your
behalf any or all of such Shares held by us for your account, pursuant to the
terms and subject to the conditions set forth in the Offer to Purchase. Your
instructions to tender Shares held by us for your account will also constitute
a direction to us to tender a number of Rights held by us for your account
equal to the number of Shares tendered.
 
  Your attention is directed to the following:
 
    1.The tender price is $32 per Share, net to the seller in cash without
  interest thereon.
 
    2.The Offer is made for all of the outstanding Shares.
 
    3.The Offer and withdrawal rights will expire at 12:00 Midnight, New York
  City time, on August 18, 1995 unless the Offer is extended.
 
    4.The Offer is conditioned upon, among other things: (1) there being
  validly tendered and not properly withdrawn prior to the expiration of the
  Offer that number of Shares which, when aggregated with the 613,550 Shares
  currently owned by Danaher, represents at least two-thirds of the total
  number of outstanding Shares determined on a fully diluted basis on the
  date of purchase; (2) the Rights having been redeemed by the Company's
  Board of Directors or Purchaser being satisfied, in its sole discretion,
  that the Rights have been invalidated or are otherwise inapplicable to the
  Offer and the Proposed Merger; and (3) Purchaser being satisfied, in its
  sole discretion, that after consummation of the Offer, the restrictions on
  business combinations as defined and contained in Sections 7.85 and 11.75
  of the Illinois Business Corporation Act will not apply to the Proposed
  Merger. The Offer is also subject to other terms and conditions, including
  the expiration or termination of the applicable antitrust waiting period.
  See the Introduction and Sections 1, 14 and 15 of the Offer to Purchase.
 
    5.Tendering shareholders will not be obligated to pay brokerage fees or
  commissions or, except as set forth in Instruction 6 of the Letter of
  Transmittal, stock transfer taxes on the purchase of Shares pursuant to the
  Offer.
 
  The Offer is being made solely by the Offer to Purchase and the related
Letter of Transmittal. The Offer is not being made to (nor will tenders be
accepted from or on behalf of) holders of Shares residing in any jurisdiction
in which the making of the Offer or the acceptance thereof would not be in
compliance with the securities, blue sky or other laws of such jurisdiction.
However, the Purchaser may, in its discretion, take such action as it may deem
necessary to make the Offer in any jurisdiction and extend the Offer to holders
of Shares in such jurisdiction. In any jurisdiction where the securities, blue
sky or other laws require the Offer to be made by a licensed broker or dealer,
the Offer will be deemed to be made on behalf of the Purchaser by the Dealer
Manager or one or more registered brokers or dealers that are licensed under
the laws of such jurisdiction.
 
  If you wish to have us tender any or all of the Shares held by us for your
account, please instruct us by completing, executing and returning to us the
instruction form contained in this letter. If you authorize a tender of your
Shares, all such Shares will be tendered unless otherwise specified in such
instruction form. Your instructions should be forwarded to us in ample time to
permit us to submit a tender on your behalf prior to the expiration of the
Offer.
 
                                       2
<PAGE>
 
          INSTRUCTIONS WITH RESPECT TO THE OFFER TO PURCHASE FOR CASH
                     ALL OUTSTANDING SHARES OF COMMON STOCK
            (INCLUDING THE ASSOCIATED COMMON STOCK PURCHASE RIGHTS)
                                       OF
 
                               JOSLYN CORPORATION
 
  The undersigned acknowledge(s) receipt of your letter enclosing the Offer to
Purchase, dated July 24, 1995 (the "Offer to Purchase"), and the related Letter
of Transmittal pursuant to an offer by TK Acquisition Corporation, a Delaware
corporation and an indirect wholly owned subsidiary of Danaher Corporation, a
Delaware corporation, to purchase all outstanding shares of Common Stock, $1.25
par value per share (the "Shares"), of Joslyn Corporation, an Illinois
corporation, and (unless and until the Purchaser declares that the Rights
Condition (as defined in the Offer to Purchase) is satisfied) the associated
common stock purchase rights (the "Rights").
 
  This will instruct you to tender the number of Shares and Rights indicated
below (or, if no number is indicated below, all Shares and Rights) which are
held by you for the account of the undersigned, upon the terms and subject to
the conditions set forth in the Offer to Purchase and in the related Letter of
Transmittal furnished to the undersigned.
 
 
 
NUMBER OF SHARES (AND RIGHTS) TO             SIGN HERE
BE TENDERED*                                 
                                             __________________________________
                                             Signature(s)

_____________ Shares (and Rights)            __________________________________

Dated _____________________, 1995            Please print name(s)

                                             __________________________________
                                             Address

                                             __________________________________
                                             Area Code and Telephone Number

                                             __________________________________
                                             Tax Identification or Social Secu-
                                             rity Number



- --------
* Unless otherwise indicated, it will be assumed that all of your Shares (and
 Rights) held by us for your account are to be tendered.
 
                                       3

<PAGE>
                                                                EXHIBIT 11(a)(6)

            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                                                      GIVE THE EMPLOYER   
FOR THIS TYPE OF ACCOUNT:      SOCIAL SECURITY                  FOR THIS TYPE OF ACCOUNT:    IDENTIFICATION      
                               NUMBER OF--                                                   NUMBER OF--         
- --------------------------------------------------              -----------------------------------------------   
<S>                            <C>                              <C>                          <C>                 
1. An individual's account     The individual                    9. A valid trust, estate,   The legal entity    
                                                                    or pension trust         (Do not furnish     
2. Two or more individuals     The actual owner                                              the identifying     
   (joint account)             of the account                                                number of the       
                               or, if combined                                               personal            
                               funds, any one                                                representative      
                               of the                                                        or trustee          
                               individuals/1/                                                unless the legal    
                                                                                             entity itself is    
3. Husband and wife (joint     The actual owner                                              not designated      
   account)                    of the account                                                in the account      
                               or, if joint                                                  title.)/5/          
                               funds, either                                                                     
                               person/1/                        10. Corporate account        The corporation     
                                                                                                                 
4. Custodian account of a      The minor/2/                     11. Religious, charitable,   The organization    
   minor (Uniform Gift to                                           or educational                               
   Minors Act)                                                      organization account                         
                                                                                                                 
5. Adult and minor (joint      The adult or, if                 12. Partnership account      The partnership     
   account)                    the minor is the                     held in the name of the                      
                               only                                 business                                     
                               contributor, the                                                                  
                               minor/1/                         13. Association, club, or    The organization    
6. Account in the name of      The ward, minor,                     other tax-exempt                             
   guardian or committee       or incompetent                       organization                                 
   for a designated ward,      person/3/                                                                         
   minor, or incompetent                                        14. A broker or registered   The broker or       
   person                                                           nominee                  nominee             
                                                                                                                 
7. a. The usual revocable      The grantor-                     15. Account with the         The public          
      savings trust account      trustee/1/                         Department of            entity              
      (grantor is also                                              Agriculture in the name                      
      trustee)                                                      of a public entity                           
   b. So-called trust account  The actual                           (such as a State or                          
      that is not a legal or   owner/1/                             local government,                            
      valid trust under State                                       school district, or                          
      law                                                           prison) that receives                        
8. Sole proprietorship         The owner/4/                         agricultural program                         
   account                                                          payments                                      
- --------------------------------------------------              -----------------------------------------------   
</TABLE> 
 
(1) List first and circle the name of the person whose number you furnish.
(2) Circle the minor's name and furnish the minor's social security number.
(3) Circle the ward's, minor's or incompetent person's name and furnish such
    person's social security number.
(4) Show the name of the owner.
(5) List first and circle the name of the legal trust, estate, or pension
    trust.
 
NOTE: If no name is circled when there is more than one name, the number will
      be considered to be that of the first name listed.
<PAGE>
 
           GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION 
                        NUMBER ON SUBSTITUTE FORM W-9 
                                    PAGE 2

OBTAINING A NUMBER

If you don't have a taxpayer identification number or you don't know your
number, obtain Form SS-5, Application for a Social Security Number 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.
 
PAYEES EXEMPT FROM BACKUP WITHHOLDING

Payees specifically exempted from backup withholding on ALL payments include
the following:
  . A corporation.
  . A financial institution.
  . An organization exempt from tax under section 501(a), or an individual re-
    tirement plan.
  . The United States or any agency or instrumentality thereof.
  . A State, the District of Columbia, a possession of the United States, or
    any subdivision or instrumentality thereof.
  . A foreign government, a political subdivision of a foreign government, or
    any agency or instrumentality thereof.
  . An international organization or any agency, or instrumentality thereof.
  . A registered dealer in securities or commodities registered 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 exempt charitable remainder trust, or a non-exempt trust described in
    section 4947(a)(1).
  . An entity registered at all times 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 which have at least one nonresident partner.
  . Payments of patronage dividends where the amount received is not paid in
    money.
  . Payments made by certain foreign organizations.
  . Payments made to a nominee.

 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 pro-
    vided 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.
  . Payments made to a nominee.

Exempt payees described above should file Form W-9 to avoid possible erroneous
backup withholding. FILE THIS FORM WITH THE PAYER, FURNISH YOUR TAXPAYER IDEN-
TIFICATION NUMBER, WRITE "EXEMPT" ON THE FACE OF THE FORM, AND RETURN IT TO
THE PAYER. IF THE PAYMENTS ARE INTEREST, DIVIDENDS, OR PATRONAGE DIVIDENDS,
ALSO SIGN AND DATE THE FORM.

 Certain payments other than interest, dividends, and patronage dividends,
that are not subject to information reporting are also not subject to backup
withholding. For details, see the regulations under sections 6041, 6041(a),
6045, and 6050A.

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. Payers must be given the numbers whether or not
recipients are required to file a tax return. 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) FAILURE TO REPORT CERTAIN DIVIDEND AND INTEREST PAYMENTS.--If you fail to
include any portion of an includible payment for interest, dividends, or
patronage dividends in gross income, such failure will be treated as being due
to negligence and will be subject to a penalty of 5% on any portion of an
under-payment attributable to that failure unless there is clear and
convincing evidence to the contrary.
(3) CIVIL PENALTY FOR FALSE INFORMATION WITH RESPECT TO WITHHOLDING.--If you
make a false statement with no reasonable basis which results in no imposition
of backup withholding, you are subject to a penalty of $500.
(4) CRIMINAL PENALTY FOR FALSIFYING INFORMATION.--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>
 
                                                                EXHIBIT 11(a)(7)


This announcement is neither an offer to purchase nor a solicitation of an 
offer to sell Shares. The Offer is made solely by the Offer to Purchase dated 
July 24, 1995 and the related Letter of Transmittal, and is not being made to 
(nor will tenders be accepted from or on behalf of) holders of Shares or 
Rights residing in any jurisdiction in which the making of the Offer or the 
acceptance thereof would not be in compliance with the securities, blue sky 
or other laws of such jurisdiction. However, the Purchaser may, in its 
discretion, take such action as it may deem necessary to make the Offer in 
any jurisdiction and extend the Offer to holders of Shares in such 
jurisdiction. In any jurisdiction where the securities, blue sky or other 
laws require the Offer to be made by a licensed broker or dealer, the Offer 
shall be deemed to be made on behalf of the Purchaser by Merrill Lynch, Pierce, 
Fenner & Smith Incorporated or one or more registered brokers or dealers that 
are licensed under the laws of such jurisdiction.
Notice of Offer to Purchase For Cash
All Outstanding Shares of Common Stock 
(Including the Associated Common Stock Purchase Rights)
of 
Joslyn Corporation
at
$32 Net Per Share
by
TK Acquisition Corporation
an indirect wholly owned subsidiary of
Danaher Corporation
        TK Acquisition Corporation, a Delaware corporation (the "Purchaser") 
and an indirect wholly owned subsidiary of Danaher Corporation, a Delaware 
corporation ("Parent"), is offering to purchase all outstanding shares of 
Common Stock, par value $1.25 per share (the "Shares"), of Joslyn 
Corporation, an Illinois corporation (the "Company"), and (unless and until 
the Purchaser declares that the Rights Condition (as defined in the Offer to 
Purchase described below) is satisfied), the associated Common Stock Purchase 
Rights (the "Rights") issued pursuant to the Rights Agreement, dated as of 
February 10, 1988, as amended as of September 2, 1994 (the "Rights 
Agreement"), between the Company and The First National Bank of Chicago, an 
Illinois banking corporation, at a price of $32.00 per Share (and associated 
Right), net to the seller in cash, upon the terms and subject to the 
conditions set forth in the Offer to Purchase, dated July 24, 1995 (the 
"Offer to Purchase"), and in the related Letter of Transmittal (which 
together constitute the "Offer"). Unless the context otherwise requires, all 
references to Shares shall include the associated Rights, and all references 
to Rights shall include all benefits that may inure to the shareholders of 
the Company or to holders of the Rights pursuant to the Rights Agreement.
      THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, 
      NEW YORK CITY TIME, ON FRIDAY, AUGUST 18, 1995, UNLESS THE OFFER IS 
      EXTENDED. 

          The Offer is conditioned upon, among other things: (1) there being 
validly tendered and not properly withdrawn prior to the expiration of the 

                                     - 1 -
<PAGE>
 
Offer that number of Shares which, when aggregated with the Shares currently 
owned by Parent, represent at least two-thirds of the total number of 
outstanding Shares determined on a fully diluted basis on the date of 
purchase, (2) the Rights having been redeemed by the Company's Board of 
Directors or the Purchaser being satisfied, in its sole discretion, that such 
Rights have been invalidated or are otherwise inapplicable to the Offer and 
the Proposed Merger (as defined below) (the "Rights Condition") and (3) the 
Purchaser being satisfied, in its sole discretion, that after consummation of 
the Offer, the restrictions on business combinations as defined and contained 
in Section 7.85 and 11.75 of the Illinois Business Corporation Act will not 
apply to the Proposed Merger. The Offer is also subject to other terms and 
conditions contained in the Offer to Purchase. See the Introduction and 
Sections 1, 14 and 15 of the Offer to Purchase.
          The purpose of the Offer is to acquire control of, and the entire 
equity interest in, the Company. The Purchaser currently intends to propose 
and seek to have the Company consummate, as soon as practicable following the 
completion of the Offer, a merger or similar business combination with the 
Purchaser (the "Proposed Merger"), pursuant to which each then outstanding 
Share (other than Shares owned by Parent or any of its wholly owned 
subsidiaries, Shares held in the treasury of the Company and Shares held by 
shareholders who perfect appraisal rights under the Illinois Business 
Corporation Act) would be converted into the right to receive cash in the 
same amount as received per Share in the Offer, and the Company would become 
an indirect wholly owned subsidiary of Parent. The consummation of the 
Proposed Merger would be subject to a number of factors (including 
satisfaction of various conditions) discussed in the Introduction and in 
Sections 1, 14 and 15 of the Offer to Purchase.
          Unless and until the Purchaser declares that the Rights Condition 
is satisfied, holders of Shares will be required to tender one associated 
Right for each Share tendered in order to effect a valid tender of such 
Share. According to the Rights Agreement, Rights will become exercisable 
after the Distribution Date (as defined in the Offer to Purchase) and, as 
soon as practicable following the Distribution Date, separate certificates 
representing the Rights ("Rights Certificates") will be mailed to holders of 
record of Shares as of the Distribution Date. If the Distribution Date does 
not occur prior to the Expiration Date (as defined in the Offer to Purchase), 
a tender of Shares will also constitute a tender of the associated Rights. If 
the Distribution Date occurs and Rights Certificates are distributed to 
holders of Shares prior to the time a holder's Shares are purchased pursuant 
to the Offer, in order for Rights (and corresponding Shares) to be validly 
tendered, Rights Certificates representing a number of Rights equal to the 
number of Shares tendered must be delivered to the Depositary (as defined 
below) or, if available, a confirmation of book-entry transfer received by 
the Depositary with respect thereto. If the Distribution Date occurs and 
Rights Certificates are not distributed prior to the time the Shares are 
purchased pursuant to the Offer, a tender of Shares constitutes an agreement 
by the tendering shareholder to deliver Rights Certificates representing a 
number of Rights equal to the number of Shares tendered pursuant to the Offer 
to the Depositary within five business days after the date Rights 
Certificates are distributed. The Purchaser reserves the right to require 
that the Depositary receive Rights Certificates, or a confirmation of 
book-entry transfer, if available, with respect to such Rights, prior to 
accepting 

                                     - 2 -
<PAGE>
 
the related Shares for payment pursuant to the Offer if the Distribution Date 
occurs prior to the Expiration Date. In all cases, payment for Shares 
tendered and purchased pursuant to the Offer will be made only after timely 
receipt by the Depositary of, among other things, Rights Certificates, if 
such Rights Certificates have been distributed to holders of Shares. If the 
Purchaser declares that the Rights Condition is satisfied, the Purchaser will 
not require delivery of Rights Certificates.
          For purposes of the Offer, the Purchaser will be deemed to have 
accepted for payment, and thereby purchased, Shares validly tendered and not 
properly withdrawn as, if and when the Purchaser gives oral or written notice 
to Bank of America Illinois (the "Depositary") of the Purchaser's acceptance 
of such Shares for payment pursuant to the Offer. In all cases, upon the 
terms and subject to the conditions of the Offer, payment for Shares 
purchased pursuant to the Offer will be made by deposit of the purchase price 
therefor with the Depositary, which will act as agent for tendering 
shareholders for the purpose of receiving payment from the Purchaser and 
transmitting such payment to validly tendering shareholders. Under no 
circumstances will interest on the purchase price for Shares and Rights be 
paid by the Purchaser, regardless of any delay in making such payment. In all 
cases, payment for Shares tendered and purchased pursuant to the Offer will 
be made only after timely receipt by the Depositary of (i) the certificates 
evidencing such Shares (the "Share Certificates") and Rights Certificates (if 
required) or timely confirmation of a book-entry transfer of such Shares or 
Rights into the Depositary's account at one of the Book-Entry Transfer 
Facilities (as defined in Section 2 of the Offer to Purchase) pursuant to the 
procedure set forth in Section 3 of the Offer to Purchase, (ii) the Letter of 
Transmittal (or a facsimile thereof), properly completed and duly executed, 
with any required signature guarantees and (iii) any other documents required 
under the Letter of Transmittal.
          The Purchaser expressly reserves the right, in its sole discretion, 
at any time and from time to time, to extend for any reason the period of 
time during which the Offer is open, including the occurrence of any 
condition specified in Section 14 of the Offer to Purchase, by giving oral or 
written notice of such extension to the Depositary. Any such extension will 
be followed as promptly as practicable by public announcement thereof, such 
announcement to be made no later than 9:00 a.m., New York City time, on the 
next business day after the previously scheduled expiration date of the 
Offer. During any such extension, all Shares previously tendered and not 
withdrawn will remain subject to the Offer, subject to the rights of a 
tendering shareholder to withdraw his Shares.
          Tenders of Shares made pursuant to the Offer are irrevocable except 
that such Shares may be withdrawn at any time prior to 12:00 Midnight, New 
York City time, on Friday, August 18, 1995 (or the latest time and date at 
which the Offer, if extended by the Purchaser, shall expire) and, unless 
theretofore accepted for payment by the Purchaser pursuant to the Offer, may 
also be withdrawn at any time after September 21, 1995. For a withdrawal to 
be effective, a written, telegraphic, telex or facsimile transmission notice 
of withdrawal must be timely received by the Depositary at one of its 
addresses set forth on the back cover page of the Offer to Purchase. Any such 
notice of withdrawal must specify the name of the person who tendered the 
Shares to be withdrawn, the number of Shares to be withdrawn and the name of 
the registered holder of such Shares, if different from that of the person 

                                     - 3 -
<PAGE>
 
who tendered such Shares. If Share Certificates evidencing Shares to be 
withdrawn have been delivered or otherwise identified to the Depositary, 
then, prior to the physical release of such Share Certificates, the serial 
numbers shown on such Share Certificates must be submitted to the Depositary 
and the signature(s) on the notice of withdrawal must be guaranteed by an 
Eligible Institution (as defined in Section 3 of the Offer to Purchase), 
unless such Shares have been tendered for the account of an Eligible 
Institution. If Shares have been tendered pursuant to the procedure for 
book-entry transfer as set forth in Section 3 of the Offer to Purchase, any 
notice of withdrawal must specify the name and number of the account at the 
Book-Entry Transfer Facility to be credited with the withdrawn Shares. A 
withdrawal of Shares shall also constitute a withdrawal of the associated 
Rights. Rights may not be withdrawn unless the associated Shares are also 
withdrawn. All questions as to the form and validity (including the time of 
receipt) of any notice of withdrawal will be determined by the Purchaser, in 
its sole discretion, whose determination will be final and binding.
          The information required to be disclosed by Rule 14d-6(e)(1)(vii) 
of the General Rules and Regulations under the Securities Exchange Act of 
1934, as amended, is contained in the Offer to Purchase and is incorporated 
herein by reference.
          A request is being made to the Company for the use of its 
shareholder list and security position listings for the purpose of 
disseminating the Offer to holders of Shares and communicating with 
shareholders regarding proxy solicitations in connection with the meeting of 
shareholders. Upon compliance by the Company with such request, the Offer to 
Purchase and the related Letter of Transmittal and, if required, other 
relevant materials will be mailed to record holders of Shares whose names 
appear on the Company's shareholder list and will be furnished to brokers, 
dealers, commercial banks, trust companies and similar persons whose names, 
or the names of whose nominees, appear on the shareholder list and the list 
of holders of Rights, if applicable, or who are listed as participants in a 
clearing agency's security position listing for subsequent transmittal to 
beneficial owners of Shares and Rights.
          The Offer to Purchase and the related Letter of Transmittal contain 
important information which should be read before any decision is made with 
respect to the Offer.
          Questions and requests for assistance or for additional copies of 
the Offer to Purchase and the related Letter of Transmittal and other tender 
offer materials may be directed to the Information Agent or the Dealer 
Manager as set forth below, and copies will be furnished promptly at the 
Purchaser's expense. No fees or commissions will be paid to brokers, dealers 
or other persons (other than the Information Agent and the Dealer Manager) 
for soliciting tenders of Shares pursuant to the Offer.
The Information Agent for the Offer is:
D.F. King & Co., Inc.
77 Water Street
New York, New York 10005
Banks and Brokers Call Collect (212) 269-5550
All Others Call Toll Free (800) 758-7358
The Dealer Manager for the Offer is:
Merrill Lynch & Co.
World Financial Center

                                     - 4 -
<PAGE>
 
North Tower
New York, New York 10281-1305
    (212) 236-4565 (Call Collect)
July 24, 1995


                                     - 5 -

<PAGE>
 
                                                                EXHIBIT 11(a)(8)

 
FOR IMMEDIATE RELEASE
                                                       CONTACT: Patrick Allender
                                                         Chief Financial Officer
                                                                  (202) 828-0850


                   DANAHER ANNOUNCES TENDER OFFER TO ACQUIRE
                 JOSLYN CORPORATION FOR $32 PER SHARE IN CASH
              ---------------------------------------------------

        WASHINGTON, D.C., July 24, 1995 -- Danaher Corporation (NYSE:DHR) 
announced today that it is commencing a cash tender offer for all outstanding 
shares of common stock of Joslyn Corporation (OTC:JOSL) at a price of $32 per 
common share. The tender offer will be initiated by a subsidiary of Danaher, TK 
Acquisition Corporation.
        Joslyn has approximately 7.2 million shares outstanding, giving the 
transaction a total equity value, including the approximately 8.6% of Joslyn's 
common stock currently owned by Danaher, of approximately $229 million. The 
offer is not subject to a financing condition.
        Danaher has informed Joslyn's management of its offer. A copy of a 
letter to William E. Bendix, Chairman of the Board of Joslyn, is attached. In 
the letter, George M. Sherman, President, Chief Executive Officer and Director 
of Danaher, stated, "We believe that an all cash price of $32 net per share for 
all shares presents a very attractive opportunity for Joslyn's shareholders." 
Mr. Sherman's letter noted that Joslyn's stock has generally traded in the low 
to mid-twenties, and that the tender offer price represents a premium of 
approximately 30% over the closing price before Danaher's July 7 proposal to 
acquire Joslyn at $32 per share.
        The terms and conditions of the offer will be set forth in offering 
documents being filed with the Securities and Exchange Commission today. The 
offer is conditioned, among other things, upon the acquisition of at least 
two-thirds of Joslyn's common stock on a fully diluted basis, and the 
elimination of Joslyn's "poison pill" and certain other anti-takeover 
provisions.
        In addition, Danaher announced that it is commencing legal action 
seeking, among other things, an order striking down provisions in Joslyn's 
poison pill that purport to require the approval of Joslyn's current directors
or their designees to dismantle the poison pill. The litigation also seeks to
require Joslyn's directors to render other anti-takeover provisions inapplicable
to Danaher's offer.
        Danaher also announced that it expects its subsidiary to file with the 
Securities and Exchange Commission preliminary solicitation materials relating 
to the calling of a special meeting of Joslyn's shareholders in order to 
expedite the tender offer.
        Joslyn Corporation provides electric power quality, protection, switch, 
control and distribution support products to the electric utility, 
telecommunications and industrial markets.
        Danaher Corporation is a leading manufacturer of Tools, 
Process/Environmental Controls and Transportation Products.


<PAGE>
 
                                                             EXHIBIT 11(b)(1)(b)

 
                        [LETTERHEAD OF BANK OF AMERICA]

July 20, 1995

Via facsimile:  (202) 828-0860
                2 pages.


Mr. C. Scott Brannan
Vice President & Controller
Danaher Corporation
1250 24th Street, N.W.
Washington, DC  20037

Dear Scott:

Bank of America is please to extend to Danaher Corporation a commitment to 
provide a $50 million 364-day revolving credit facility, the terms and 
conditions which are summarized on the attached indicative term sheet and 
subject to execution of final credit documentation.

Scott, Bank of America highly values the relationship with Danaher and looks 
forward to further enhancing it in mutually beneficial ways.

Unless accepted, this commitment terminates on August 31, 1995


                                        Sincerely,

                                        /s/ Donald J. Chin



Accepted and agreed:
DANAHER CORPORATION

By: /s/ PWA

Title: CFO

Date: July 23, 1995


<PAGE>
 
                                                                      ATTACHMENT

                              DANAHER CORPORATION
                        INDICATIVE TERMS AND CONDITIONS

Borrower:            Danaher Corporation

Bank:                Bank of America National Trust and Savings Association
                     and/or its affiliated banks.

Facility:            364-day revolving credit facility.

Purpose:             General corporate.

Amount:              Up to US$50,000,000.

Maturity:            364 days from closing of credit documentation but no later
                     than August 31, 1996.

Pricing:             Facility fee - 0.10% per annum, payable on the calendar
                     quarter-end in arrears based upon a 360 day-year. Subject
                     to adjustment based upon increasing leverage similar to the
                     Borrower's existing credit agreement.

                     LIBOR Interest Rate - LIBOR plus 0.375% for interest
                     periods of 1, 2 or 3 months, payable at the end of each
                     interest period based upon a 360 day-year. Subject to
                     adjustment based upon increasing leverage similar to the
                     Borrower's existing credit agreement.

                     Money Market Interest Rate - an absolute rate of interest
                     for a specified interest period as mutually agreed upon
                     between Borrower and Bank, payable at the end of interest
                     period or as agreed upon based upon a 360 day-year.

Financial
  Covenants:         Identical to those found in the Borrower's existing $200 mm
                     syndicated revolver credit facility dated September 7,
                     1990, as amended from time to time.

Representations
  and Warranties:    Similar to those found in Borrower's existing credit 
                     agreement.

Covenants:           Similar to those found in Borrower's existing credit 
                     agreement.

Events of
  Default:           Similar to those found in Borrower's existing credit 
                     agreement.


Miscellaneous:       Similar provisions to those found in Borrower's existing
                     credit agreement.



                                                                   July 20, 1995

<PAGE>
                                                                EXHIBIT 11(g)(1)



                      IN THE UNITED STATES DISTRICT COURT
                     FOR THE NORTHERN DISTRICT OF ILLINOIS
                               EASTERN DIVISION
 
DANAHER CORPORATION and      )
TK ACQUISITION CORPORATION,  )
                             )
Plaintiffs,                  )
                             )
v.                           ) Civil Action No.
                             )
JOSLYN CORPORATION,          )
WILLIAM E. BENDIX,           )
LAWRENCE G. WOLSKI,          )
JAMES M. REED,               )
LAWRENCE A. REED,            )
JOHN H. DEININGER and        )
RICHARD C. OSBORNE,          )
                             )
Defendants.                  )
 
                                   COMPLAINT
                                   ---------

      Plaintiffs Danaher Corporation ("Danaher") and TK Acquisition Corporation
("Purchaser"), by their attorneys, as and for their Complaint, allege as
follows:

                              Nature of the Action
                              --------------------

      1.  On July 24, 1995, plaintiffs announced their intention to commence a
non-coercive, fully-financed, all-cash tender offer for all outstanding shares
of common stock of Joslyn Corporation ("Joslyn") at a price of $32 per share
(the "Offer").
<PAGE>
Danaher intends, as soon as practicable following consummation
of the Offer, to cause Joslyn to merge with Purchaser or another Danaher
subsidiary (the "Proposed Merger") at the same price per share.
 
      2.  Two weeks earlier, on July 10, 1995, Danaher announced its interest
in negotiating the acquisition of Joslyn by Danaher for a price of $32 per share
(the "Proposal").  The Proposal and the Offer represent a premium of
approximately 30 percent over the $24.75 closing market price on the last
trading day before Danaher's public announcement on July 10, 1995 of its
interest in acquiring Joslyn.  Despite this generous premium, Joslyn and its
Board of Directors rejected Danaher's Proposal, refused to enter into
negotiations with Danaher, and have indicated their intention to invoke a number
of anti-takeover measures to prevent Joslyn's shareholders from reaping the
benefits of the Proposal.  Accordingly, and as part of their efforts to acquire
Joslyn, plaintiffs intend to solicit authorization from other shareholders of
Joslyn for the calling of a special meeting of the shareholders of Joslyn.  If
such a special meeting is called, plaintiffs would solicit proxies to replace
Joslyn's current Board of Directors with other nominees and to take certain
other actions to facilitate consummation of the Offer and the Proposed Merger
(the "Proxy Solicitation").  The purpose of such a Proxy Solicitation would be
to permit the shareholder-owners of Joslyn to decide for themselves whether they
wish the Proposed Merger to proceed.

      3.  Two of the anti-takeover measures available to Joslyn (hereinafter,
the "Ultra Vires Acts") are unauthorized under and directly contrary to Illinois
law:  (a) a unique "continuing directors" provision in Joslyn's "poison pill"
that, unlike any anti-

                                       2
<PAGE>
 
takeover device ever upheld by a court, purports to prohibit any new directors
whom Joslyn's shareholders may elect from exercising their fiduciary duties in
determining whether to redeem or otherwise eliminate Joslyn's poison pill (the
"Continuing Directors Provision"); and (b) a possible determination by the
Joslyn Board that the restrictions of Section 7.85 of the Illinois Business
Corporation Act, 805 ILCS 5/7.85(C)(11) -- which permanently prohibit a business
combination with an "Interested Shareholder" except in limited circumstances --
are applicable to plaintiffs by virtue of the tender of shares to plaintiffs
prior to acceptance, plaintiffs' receipt of authorizations for calling a special
meeting, or plaintiffs' receipt of revocable proxies. Unless the Ultra Vires
Acts are preliminarily and permanently enjoined, they will make it impossible
for plaintiffs to proceed with their Offer, the Proposed Merger and the Proxy
Solicitation.

      4.  In addition to the Ultra Vires Acts, defendants have taken and may
take certain defensive measures that, given the all-cash, non-coercive, and
highly valuable nature of this Offer, constitute an unreasonable response to the
Offer, the Proposed Merger and the Proxy Solicitation, in violation of the
fiduciary duties that Joslyn's directors owe to Joslyn's share holders.  These
include, but are not limited to, use of the following to defeat or impede the
Offer, the Proposed Merger and the Proxy Solicitation:  (a) a poison pill
enacted in 1988 and amended in September 1994 in specific response to Danaher's
acquisition of an interest in Joslyn (the "Poison Pill"); (b) the restrictions
set forth in Section 7.85 of the Illinois Business Corporation Act, 805 ILCS
5/7.85 ("Section 7.85"); and (c) the restrictions in Section 11.75 of the
Illinois Business Corporation Act, 

                                       3
<PAGE>
 
805 ILCS 5/11.75 ("Section 11.75"). Plaintiffs and Joslyn's shareholders will
suffer irreparable injury if defendants are not enjoined from utilizing the
aforementioned defenses, in breach of their fiduciary duties, to interfere with
or impede the Offer, the Proposed Merger and the Proxy Solicitation.


      5.  Plaintiffs bring this action to obtain the judicial relief necessary
to allow the shareholders of Joslyn to decide for themselves whether to accept
plaintiffs' Offer.  Given the all-cash, all-shares nature of the Offer and its
substantial value to Joslyn's stockholders, Joslyn's Board of Directors should
not be allowed to deprive the stockholders of the opportunity to decide for
themselves on the merits of the Offer.  Unless enjoined, the Ultra Vires Acts
make it impossible for plaintiffs to proceed with this Offer, the Proposed
Merger and the Proxy Solicitation.  Therefore, plaintiffs, through their
contemporaneous motion for a preliminary injunction, seek the following
immediate relief against the Ultra Vires Acts:

          (i)  an immediate injunction preliminarily and permanently prohibiting
application of the Continuing Directors Provision of Joslyn's Poison Pill, which
disenfranchises stockholders by making it impossible for them to elect directors
to redeem the Poison Pill or to approve the Offer; and

          (ii)  an immediate injunction preliminarily and permanently preventing
Joslyn's Board of Directors from treating (a) the tender of shares to
plaintiffs, prior to plaintiffs' acceptance of such shares for purchase, (b)
plaintiffs' obtaining of authorization for the calling of a special meeting of
Joslyn's shareholders, or (c) the 

                                       4
<PAGE>
 
giving of revocable proxies or consents to vote shares, as vesting beneficial
ownership of such shares in plaintiffs, thus making plaintiffs "Interested
Shareholders" for purposes of Section 7.85.

      6.  In addition, although not part of the contemporaneous motion for a
preliminary injunction, plaintiffs seek the following relief:

          (i)  a preliminary and permanent injunction preventing the application
of Joslyn's Poison Pill to plaintiffs' Offer and ordering Joslyn's Board of
Directors, consistent with their fiduciary duties, to redeem the Poison Pill or
amend it to make it inapplicable to plaintiffs' Offer;

          (ii)  a preliminary and permanent injunction preventing Joslyn's Board
of Directors from using Section 7.85 or Section 11.75 to interfere with or
prevent plaintiffs' Offer and the Proposed Merger, and ordering Joslyn's Board
of Directors, consistent with their fiduciary duties, to approve the Proposed
Merger pursuant to such statutes to allow Joslyn's shareholders to accept the
Offer;

          (iii)  a declaration that any state's laws other than Illinois' that
purport to regulate business combinations of Joslyn are inapplicable to
plaintiffs' Offer, the Proposed Merger and the Proxy Solicitation;

          (iv)  a preliminary and permanent injunction preventing defendants
from insti tuting proceedings in any other court or forum concerning or related
to plaintiffs' Offer, the Proposed Merger and the Proxy Solicitation; and

                                       5
<PAGE>
 
          (v)  a preliminary and permanent injunction preventing defendants from
otherwise impeding plaintiffs' Offer, the Proposed Merger and the Proxy
Solicitation.

                             Jurisdiction and Venue
                             ----------------------

      7.  The Court has original jurisdiction of the subject matter of this
action pursuant to 28 U.S.C. (S)(S) 1331, 1332(a), 1337, 1343(a) and 2201 and 15
U.S.C. (S) 78aa, and supplemental jurisdiction pursuant to 28 U.S.C. (S)
1367(a).  On information and belief, the plaintiffs and defendants are citizens
of different states.  The matter in controversy exceeds the sum of $50,000,
exclusive of interest and costs.

      8.  Venue is proper in this district pursuant to 28 U.S.C. (S) 1391(b) and
(c) and 15 U.S.C. (S) 78aa.

                                  The Parties
                                  -----------

      9.  Plaintiff Danaher is a Delaware corporation with its principal place
of business in Washington, D.C. Danaher's principal businesses include
manufacture and sale of general purpose mechanics' hand tools and automotive
specialty tools (including the Craftsman and NAPA lines), process and
environmental controls, and automotive and transportation products (including
products sold under such brand names as Coats, Ammco and "Jake Brake"). Danaher
has grown, through a series of strategic acquisitions 

                                       6
<PAGE>
 
as well as internal growth, to have total revenues of approximately $1.3 billion
in 1994. Danaher owns approximately 8.6 percent of Joslyn's common stock.

      10. Plaintiff Purchaser is a newly-incorporated Delaware corporation with
its principal place of business in Washington, D.C.  It is a wholly-owned
indirect subsidiary of Danaher and was incorporated for the purpose of making
the Offer and acquiring all the stock of Joslyn.

      11. On information and belief, defendant Joslyn is an Illinois corporation
with its principal place of business in Illinois.  Joslyn has described itself
in its 1994 Form 10-K (a copy of which is attached as an exhibit to the
separately-filed Motion for Preliminary Injunction ("Preliminary Injunction
Motion")) as a holding company for a number of subsidiaries that are engaged
primarily in the manufacturing and supplying of electrical hardware, apparatus,
protective equipment, air pressurization and dehydration products, and services
used in the construction and maintenance of transmission and distribution
facilities to electric power and telephone companies. Joslyn's subsidiaries also
manufacture and supply vacuum switchgear and electrical controls to commercial
and industrial markets as well as protective equipment, connector backshells,
and air and gas dehydration systems to aerospace and defense companies. These
businesses complement Danaher's businesses. Joslyn's stock is listed and
actively traded on the NASDAQ National Market System. For the fiscal year 1994,
Joslyn had sales of approximately $216 million and a net loss of approximately
$11 million. Including outstanding shares, shares issuable under outstanding
options, and shares available for grant under Joslyn's 

                                       7
<PAGE>
 
Employee Stock Benefit Plan, there are approximately 7.5 million shares of
Joslyn's common stock outstanding on a fully-diluted basis.

      12. On information and belief, defendant Bendix, a resident of Illinois,
is Chairman of the Board of Joslyn.  He owns approximately 2,000 shares of
Joslyn's common stock.

      13. On information and belief, defendant Wolski, a resident of Illinois,
is Acting Chief Executive Officer and a Director of Joslyn. He owns
approximately 42,717 shares of Joslyn's common stock, and has voting power as to
an additional approximately 1,555 shares through Joslyn's Profit Sharing Plan.

      14. On information and belief, the remaining members of Joslyn's Board of
Directors (the "Board") are defendant James Reed, a resident of New Jersey,
defendant Lawrence Reed, a resident of Michigan, defendant Deininger, a resident
of Indiana, and defendant Osborne, a resident of Illinois (together with
defendants Bendix and Wolski, the "Director Defendants").

           The Offer, The Proposed Merger and The Proxy Solicitation
           ---------------------------------------------------------

      15. Beginning on May 29, 1994, Danaher began to purchase stock of Joslyn
in the marketplace.  By August 5, 1994, Danaher had purchased approximately
543,550 shares, equal to approximately 7.6 percent of Joslyn's common stock.  On
August 12, 1994, Danaher filed a Schedule 13D with the Securities and Exchange
Commission disclosing its purchases.  Danaher also filed a notification pursuant
to the Hart-Scott-

                                       8
<PAGE>
 
Rodino Antitrust Improvements Act of 1976 (the "HSR Act") with
the Federal Trade Commission seeking approval to acquire more than $15 million
of Joslyn's stock.

      16. In immediate response to Danaher's August 1994 purchases, Joslyn
amended the Poison Pill on September 2, 1994 to make it more stringent and to
eliminate the exception in the Continuing Directors Provision for all-cash-for-
all-shares tender offers.  A copy of Joslyn's Poison Pill, adopted on February
10, 1988, and the September 2, 1994 amendment, are attached as exhibits to
Preliminary Injunction Motion and are incorporated herein by reference.

      17. On October 6, 1994, Danaher purchased an additional 70,000 shares,
bringing the total number of Joslyn shares it owns to approximately 613,550,
representing about 8.6 percent of Joslyn's common stock.

      18. On June 30, 1995, a representative of Danaher called defendant Bendix
to inquire whether Joslyn might be receptive to an expression of interest by
Danaher in a business transaction between Danaher and Joslyn. Following several
additional telephone conversations, Danaher informed Joslyn on Friday, July 7,
1995 of its interest in negotiating the acquisition of Joslyn by Danaher for a
price of $32 per share.

      19. This Proposal was publicly announced before the opening of market
trading on Monday, July 10, 1995, at which time Joslyn informed Danaher, and
publicly announced, that the Board would consider the proposal at its regularly
scheduled meeting on July 19, 1995.  Despite the substantial 30 percent premium
that the $32 price represented over the prior market price of Joslyn's stock and
Danaher's expressed 

                                       9
<PAGE>
 
willingness to consider a higher price, Joslyn's Board on July 19, 1995 rejected
the proposal and refused to enter into merger discussions with Danaher on the
ground that it was "not in the best interests of Joslyn's shareholders."

      20. On July 24, 1995, plaintiffs announced their intention to commence a
tender offer for all outstanding shares of Joslyn common stock (together with
the associated common stock purchase rights issued in connection with Joslyn's
Poison Pill) at the price of $32 per share (and associated right). Plaintiffs
also announced their intention, as soon as practicable following consummation of
the Offer, to propose and seek to consummate a merger or similar business
combination of Joslyn with Purchaser or another direct or indirect wholly-owned
subsidiary of Danaher. The purpose of the Proposed Merger is to acquire all
shares not tendered and purchased pursuant to the Offer or otherwise. Pursuant
to the Proposed Merger, each such share (other than those held by stockholders
who perfect appraisal rights) would be converted into the right to receive the
same $32 per share in cash paid pursuant to the Offer. A copy of plaintiffs'
Offer to Purchase is attached as an exhibit to the Preliminary Injunction
Motion.

      21. The Offer is conditioned upon, among other events:
          (i)  the valid tender of at least two-thirds of the outstanding shares
of Joslyn's common stock on a fully-diluted basis; and
          (ii)  redemption, invalidation or inapplicability of the share
purchase rights issued in connection with the Poison Pill.

                                       10
<PAGE>
 
The Offer is not subject to any condition relating to plaintiffs' ability to
finance the Offer or the Proposed Merger.

      22.  The Offer and the Proposed Merger present Joslyn's shareholders with
an out standing opportunity to maximize the value of their Joslyn shares. The
price of Joslyn's common stock, which closed at $24.75 on the last trading day
before Danaher's public announcement of its interest in acquiring Joslyn, has
languished for a number of years despite a bull market.  The low bid and high
ask prices listed in Joslyn's 1994 10-K were $22.50 and $28 in 1993, and $22.75
and $31 in 1994. (The $31 high ask in the third quarter of 1994 undoubtedly
reflected market speculation about a possible acquisition of Joslyn in light of
Danaher's public announcement in August 1994 that it had acquired more than 5
percent of Joslyn's common stock.) Similarly, for the first half of 1995, the
low bid was $24.50 and the high ask was $27.75.

      23. Plaintiffs' Offer is in the best interests of Joslyn's stockholders.
It is a fully-financed, all cash-offer, available to all Joslyn stockholders,
for all outstanding shares.  It is not "front-end loaded" -- that is, the
consideration that it offers is not part cash and part stock and it does not
offer a higher price than non-tendering shareholders would receive in the
Proposed Merger.  Nor is it coercive in nature, as it offers all cash
consideration for all shares and treats all Joslyn shareholders equally.  It
provides Joslyn's stockholders with the opportunity to realize a substantial
premium of $7.25 per share (or 30 percent) over the market price of the shares
immediately prior to the announcement of Danaher's interest in acquiring Joslyn.

                                       11
<PAGE>
 
      24. The Offer, the Proposed Merger and the Proxy Solicitation do not pose
any threat to the interests of Joslyn's stockholders or to Joslyn's corporate
policy and effectiveness.  Danaher has grown to its present size through a
strategy of acquiring companies and managing them successfully.

      25. The Offer, the Proposed Merger and the Proxy Solicitation comply or
will comply with all applicable laws, obligations and agreements, including,
without limitation, the securities laws, the antitrust laws, and all other legal
obligations to which plaintiffs are subject, including any contractual and
common law obligations that may be owed by plaintiffs to Joslyn. The offering
documents are being filed with the SEC and NASD and delivered to Joslyn upon
commencement of the Offer. The offering documents fairly disclose all
information material to the decision of Joslyn's stockholders on whether to
accept or reject the Offer in compliance with plaintiffs' obligations under the
securities laws. Plaintiffs will also make the filings required by the HSR Act.
The Offer, the Proposed Merger and the Proxy Solicitation are lawful under the
antitrust laws.

      26. As set forth in paragraphs 27 to 36 below, Joslyn's Board has no
lawful authority to use the Continuing Directors Provision or its power to
determine whether a person is an "Interested Shareholder" under Section
7.85(C)(11) of the Illinois Business Corporation Act (the "Determination
Authority") to interfere with the Offer, the Proposed Merger or the Proxy
Solicitation.  Use of the Continuing Directors Provision or the Determination
Authority to interfere with this Offer, the Proposed Merger or the Proxy

                                       12
<PAGE>
 
Solicitation would violate Illinois law, breach the Directors Defendants'
fiduciary duties and cause irreparable injury to plaintiffs and Joslyn's
shareholders.

                              The Ultra Vires Acts
                              --------------------

The "Continuing Directors" Provision
- ------------------------------------

      27. Joslyn's Continuing Directors Provision, unlike any anti-takeover
device upheld by a court, precludes a bidder from taking its case directly to
the shareholders -- who own Joslyn -- by preventing Joslyn's shareholders from
electing directors who have authority to redeem the Poison Pill (or otherwise
make it inapplicable to the Offer).

      28. To implement Joslyn's Poison Pill, the Board in early 1988 declared a
dividend of one common stock share purchase right (a "Right") per share of
common stock, pay able to each of Joslyn's stockholders of record as of March 4,
1988.  Each Right ostensibly entitles the holder to purchase a share of Joslyn's
common stock at a price of $60 per share.  Given that, before the public
announcement of the Proposal, Joslyn's stock never has traded above $31 per
share, the prohibitive $60 per share exercise price makes it clear that the
Rights never were intended to provide the holders thereof with a meaningful
opportunity to purchase the common stock authorized under the Poison Pill.
Instead, Joslyn's Board instituted the Poison Pill solely so that its "flip-in"
and "flip-over" provisions (as described below) could be deployed when necessary
to make any offer not approved by the continuing directors prohibitively
expensive by drastically 

                                       13
<PAGE>
 
diluting Joslyn's outstanding shares or ravaging the capital structure of the
potential acquirer.

      29. The "flip-in" rights are triggered when a person or entity becomes the
beneficial owner of 15 percent or more of Joslyn's outstanding shares.  Once
the Rights flip in, all Rights holders, except the potential acquirer, may
exercise each Right to receive one share of Joslyn common stock at an immense
discount -- namely for 20 percent of the then-market price of the stock.  Any
Rights held by the potential acquirer, however, become void.  Thus, all Rights
holders other than the acquirer would be entitled to purchase Joslyn's common
stock for one-fifth of its then-market price.  In this way, the "flip-in"
feature flagrantly discriminates against an acquirer by diluting its stock
holdings and increasing exponentially the number of shares the acquirer would
have to purchase in order to consummate a merger.

      30. The "flip-over" rights are triggered if:
          (i)  Joslyn engages in a merger or other business combination in which
it is not the surviving corporation;
          (ii)  Joslyn engages in a merger or other business combination in
which it is the surviving corporation, but in which its common stock is changed
or exchanged; or
          (iii)  more than 50 percent of Joslyn's assets or earning power is
sold or transferred.

                                       14
<PAGE>
 
      31. Upon the occurrence of any of these "flip-over" events, all Rights
holders, except the acquirer, may exercise each Right to purchase shares of
common stock of the acquiring company at 50% of its value.  In this way, the
"flip-over" feature subjects the acquiring company to a massive half-price sale
of its own stock, drastically impairing its capital structure.  The obvious
purpose of the Poison Pill is to render an attempted acquisition of Joslyn
financially impossible without the blessing of the incumbent directors.

      32. Under the Continuing Directors Provision, there are two crucial
circumstances, both presented here, when the Rights may be redeemed (or the
Poison Pill amended in certain ways) only by a majority of Joslyn's "Continuing
Directors."  The Continuing Directors consist of members of the Board at the
time the Poison Pill was adopted (in 1988) and directors elected since then
whose election was recommended or approved by a majority of the Continuing
Directors (but in all circumstances excluding the potential acquirer and its
affiliates, associates and representatives). The "Continuing Directors"
limitation applies whenever: (1) someone has become the beneficial owner of 15
percent or more of Joslyn's stock (an "Acquiring Person"), or (2) even if there
is no Acquiring Person, if a majority of the directors change as the result of a
proxy or consent solicitation by anyone who has stated that he (or who the Board
decides) intends to take, or even "may consider taking," any action which would
result in his becoming an Acquiring Person.

                                       15
<PAGE>
 
      33. When the Poison Pill first was adopted in 1988, it provided that this
Continuing Directors Provision would not apply in the second of the two
circumstances described in the preceding paragraph if the proxy or consent
solicitation were concurrent with a cash tender offer for all outstanding shares
of Joslyn's common stock.  Moreover, in a letter to shareholders at the time
Joslyn adopted the Poison Pill, Joslyn expressly stated that the Pill "is not
intended to prevent a takeover of the Corporation."  Instead, Joslyn
characterized the Pill as being intended only to protect against "coercive or
unfair takeover tactics" such as a "two-tiered tender offer that does not treat
all shareholders equally," which could "pressure shareholders, forcing them out
of their investment without giving them any real choice."

      34. Despite Joslyn's professed initial intention to preclude only coercive
offers, Joslyn amended its Poison Pill on September 2, 1994 to make the
Continuing Directors Provisions applicable even to fully-financed, all-cash-for-
all-shares offers.  The amendment, adopted in immediate response to Danaher's
purchase of 7.6 percent of Joslyn's stock, deleted the exception to the
Continuing Directors Provision described in the preceding paragraph, leaving no
way to eliminate the Poison Pill absent approval by Continuing Directors, even
in the event of an all-cash offer for all shares like Danaher's. (The Board in
1994 also lowered the threshold for becoming an Acquiring Person from 20 to 15
percent and made certain other changes to the Poison Pill.)

      35. Thus, as amended, this Continuing Directors Provision would prevent
Joslyn's shareholders from exercising their control over the management of the

                                       16
<PAGE>
 
corporation by electing a Board comprised of new members with authority to
redeem the Rights. Only if at least two Continuing Directors remained on the
Board, and only if a majority of those Continuing Directors approved, could a
new Board eliminate the Poison Pill as a barrier to the Offer and the Proposed
Merger. This draconian, disenfranchising self-entrenchment device, adopted
without any shareholder vote or amendment of Joslyn's Articles of Incorporation
(a copy of which is attached as an exhibit to the Preliminary Injunction
Motion), strips shareholders of their fundamental ability to elect directors to
manage the company, and violates three separate provisions of the Illinois
Business Corporation Act:

          (i)  Section 8.05, 805 ILCS 5/8.05, which provides that the business
and affairs of the corporation shall be managed by or under the direction of its
board of directors;
          (ii)  Section 6.05, 805 ILCS 5/6.05, which requires that all directors
act as fiduciaries in connection with poison pills; and
          (iii)  Section 7.40, 805 ILCS 5/7.40, which gives the shareholders the
right to elect directors, except as provided in the Articles of Incorporation.

      36. The September 1994 Amendment to the Continuing Directors Provision,
making it applicable to all-cash tender offers, was, as a matter of law, an
unreasonable response to Danaher's August 1994 acquisition of shares and filing
of its Schedule 13D, and constituted a breach of fiduciary duties to the
shareholders of Joslyn.  Any further reliance upon the Continuing Directors
Provision is an unreasonable response to this 

                                       17
<PAGE>
 
Offer and the Proxy Solicitation and constitutes a breach of the Director
Defendants' fiduciary duties to the shareholders of Joslyn.

Section 7.85(C)(11) -- Determination Authority
- ----------------------------------------------

      37. Section 7.85 of the Business Corporation Act, 805 ILCS 5/7.85, which
was adopted in 1985 and is entitled "Vote Required for Certain Business
Combinations," was designed to impede coercive tender offers -- particularly so-
called "two-tier front-end loaded" offers in which an acquirer seeks to obtain a
controlling interest at a higher price, merger or other transaction.  Section
7.85 provides that, if a person beneficially owns 10 percent or more of a
corporation's voting stock (thereby becoming an "Interested Shareholder"), such
Interested Shareholder may NEVER engage in a "business combination" with the
corporation (broadly defined to include a merger or consolidation, and also
virtually any disposition of 10 percent or more of the corporation's assets)
unless:

          (i)  two-thirds of the "Disinterested Directors" (directors not
affiliated with or nominated for election by the Interested Shareholder) approve
the combination;

          (ii)  the combination is approved by the holders of at least 80
percent of the voting stock and a majority of the stock not owned by the
Interested Shareholder; or

                                       18
<PAGE>
 
          (iii)  the combination meets certain so-called "fair price" and "fair
process" requirements.

      38. Section 7.85 states that a person shall be considered the "beneficial
owner" of shares that, inter alia, "such person or any of its Affiliates or
Associates has (1) the right to acquire . . . pursuant to any agreement,
arrangement or understanding or upon the exercise of conversion rights, exchange
rights, warrants or options, or otherwise, or (2) the right to vote or direct
the vote pursuant to any agreement, arrangement or understanding."  805 ILCS
5/7.85(C)(3)(b).  Section 7.85(C)(11) provides that a "majority of the
Disinterested Directors shall have the power to determine, for the purposes of
this Section 7.85, (a) whether a person is an Interested Shareholder, [and] (b)
the number of Voting Shares beneficially owned by any person" (the
"Determination Authority").

      39. Section 7.85 contemplates that, as expressly provided in Section 11.75
(see paragraph 49 below), beneficial ownership cannot arise from the mere
unaccepted tender of shares or giving of revocable proxies.  The Disinterested
Directors do not possess statutory authority pursuant to the Determination
Authority to declare that shares are beneficially owned by a potential acquirer
merely because of an unaccepted tender of shares, the grant of a revocable
proxy, or the receipt of authorizations for the calling of a special meeting.
Were the statute to grant that Determination Authority to the Disinterested
Directors, it would constitute an unlawful and unconstitutional delegation of

                                       19
<PAGE>
 
legislative and judicial authority in violation of Article IV, Section 1 of the
Illinois Constitution and the Due Process Clause of the United States
Constitution.

      40. Any use by the Director Defendants of the Determination Authority
pursuant to Section 7.85(C)(11) to interfere with plaintiffs' Offer or the Proxy
Solicitation would constitute an unreasonable response to the Offer and the
Proxy Solicitation and a breach of the Director Defendants' fiduciary duties to
the shareholders.

                    Irreparable Injury From Ultra Vires Acts
                    ----------------------------------------

      41. Only through the exercise of the Court's equitable powers will
plaintiffs and Joslyn's other stockholders be protected from immediate and
irreparable injury. Unless enjoined, the Ultra Vires Acts purport to give the
Board authority to prevent the Offer and the Proxy Solicitation, an authority
they do not lawfully possess.  The shareholders cannot make an informed response
to the Offer and the Proxy Solicitation unless this Court declares immediately
that these Ultra Vires Acts are not available to the Joslyn Board.  Plaintiffs
will be precluded from proceeding with the Offer, the Proposed Merger and the
Proxy Solicitation, plaintiffs will lose the unique and irreplacable opportunity
to acquire Joslyn, and Joslyn stockholders will be deprived of the opportunity
to decide for themselves whether or not to accept the Offer, unless the Court:
      (i) declares the Continuing Directors Provision null and void and
preliminarily and permanently enjoins the operation of the same; and

                                       20
<PAGE>
 
          (ii) preliminarily and permanently enjoins the Director Defendants
from treating the tender of shares prior to acceptance, receipt of
authorizations to call a special meeting, or giving of revocable proxies as
vesting beneficial ownership in plaintiffs under Section 7.85.

                           Breaches of Fiduciary Duty
                           --------------------------

      42. In addition to the foregoing Ultra Vires Acts, Joslyn's Board may use
certain other anti-takeover measures to defeat the Offer, the Proposed Merger
and the Proxy Solicitation in breach of their fiduciary duties.  These devices
include the Poison Pill, the other provisions of Section 7.85 and the provisions
of Section 11.75, the institution of litigation in other forums, and/or invoking
state anti-takeover laws other than the laws of Illinois.

      43. As set forth in paragraphs 44 to 53 below, given the all-cash, non-
coercive nature of the Offer and the favorable opportunity it presents to Joslyn
shareholders, any use by Joslyn of its Poison Pill, Section 11.75, the other
provisions of Section 7.85, the provisions of any foreign business corporation
acts, or litigation in other forums, to interfere with or impede this Offer, the
Proposed Merger or the Proxy Solicitation would constitute a breach of the
Director Defendants' fiduciary duties and should therefore be enjoined.

                                       21
<PAGE>
 
The Poison Pill As A Breach Of Fiduciary Duties
- -----------------------------------------------

      44. Joslyn's Poison Pill gives the Board the effective power unilaterally
to block all acquisition offers, even non-coercive, all-cash, all-shares offers
that provide substantial benefits to Joslyn's shareholders.  The Poison Pill is
designed to make any acquisition of Joslyn that is not approved by the Board
prohibitively expensive by causing substantial dilution to, and inflicting
massive economic penalties on, any person or company that attempts to acquire
Joslyn without approval of Joslyn's current directors.

      45. Given the prohibitively expensive effect of triggering the Poison
Pill, the practical effect of the Poison Pill is to prevent plaintiffs from
consummating their Offer to purchase Joslyn's shares at a substantial premium
for Joslyn's shareholders. Recognizing the insurmountable barrier posed by the
Poison Pill, plaintiffs have made their Offer conditional upon the voluntary or
court-ordered redemption, invalidity or removal of the Rights.  Thus, unless the
Rights are redeemed (or the Poison Pill amended to make it inapplicable to the
Offer and the Proposed Merger), Joslyn's shareholders will be deprived of the
opportunity to decide whether they want to accept plaintiffs' non-coercive, all-
cash, all-shares, equal-treatment tender offer.

      46. As set forth above, the ability to remove the draconian effects of the
Poison Pill and to provide Joslyn's shareholders with an opportunity to accept
plaintiffs' Offer rests solely in the hands of the Director Defendants, who have
the authority to

                                       22
<PAGE>
 
redeem the Rights at 3 1/3 cents per Right until fifteen days after the
acquisition by any person or entity of at least 15 percent of Joslyn's
outstanding shares. Alternatively, the Board can amend the Poison Pill to make
the Rights inapplicable to the Offer and the Proposed Merger. Any failure to
redeem the Rights or to amend the Poison Pill to make it inapplicable to the
Offer and the Proposed Merger constitutes an unreasonable response to this Offer
and a breach of the Defendant Directors' fiduciary duties to Joslyn's share
holders.

Section 11.75
- -------------

      47. Section 11.75 of the Business Corporation Act, 805 ILCS 5/11.75, which
was adopted in 1989 and is entitled "Business Combinations with Interested
Stockholders," applies to any Illinois corporation that has not opted out of the
statute's coverage.  Joslyn has not opted out of the statute's coverage.

      48. Like Section 7.85, Section 11.75 was designed to impede coercive and
inadequate tender offers.  It provides that if a person beneficially owns 15
percent or more of a corporation's voting stock (thereby becoming an "Interested
Shareholder"), such Interested Shareholder may not engage in a "business
combination" with the corporation (broadly defined as in Section 7.85) for three
years after the Interested Shareholder became an Interested Shareholder, unless:
      (i) prior to the 15 percent acquisition, the Board of Directors has
approved either the acquisition or the business combination;

                                       23
<PAGE>
 
      (ii) the Interested Shareholder acquires at least 85 percent of the
corporation's voting stock in the same transaction in which it crosses the 15
percent threshold (excluding certain stock such as that held by officer
directors); or
      (iii)  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 Shareholder.

      49. Section 11.75 further provides that a person shall not be considered
the beneficial owner of shares tendered pursuant to a tender or exchange offer
until such tendered shares are accepted for purchase or exchange, nor shall a
person be considered the beneficial owner of shares on account of being given
the right to vote such shares solely pursuant to a revocable proxy or consent
given in response to a proxy solicitation made to ten or more persons.  These
provisions confirm that the 15 percent trigger is not tripped merely on account
of the unaccepted tender of shares pursuant to a tender offer or the obtaining
of proxies for a limited purpose in a Proxy Solicitation.

      50. Any use by the Joslyn Board of Section 11.75 to obstruct the Offer,
which is all-cash and non-coercive, offers Joslyn's stockholders a substantial
premium for their shares, and poses no threat to the interests of Joslyn's
stockholders or to Joslyn's

                                       24
<PAGE>
 
corporate policy and effectiveness, including any failure to approve the Offer
pursuant to Section 11.75, would constitute an unreasonable response to the
Offer and a breach of the Director Defendants' fiduciary duties.

Section 7.85 -- Breach of Fiduciary Duties
- ------------------------------------------

      51. Any use of Section 7.85 by the Joslyn Board to obstruct the Offer,
which is all-cash and non-coercive, offers Joslyn's stockholders a substantial
premium for their shares, and poses no threat to the interests of Joslyn's
stockholders or to Joslyn's corporate policy and effectiveness, including any
failure to approve the Offer pursuant to Section 7.85, would constitute an
unreasonable response to the Offer and a breach of the Director Defendants'
fiduciary duties.

Foreign State Business Combination Statutes
- -------------------------------------------

      52. A number of foreign states have enacted business combination statutes
that purport to regulate the internal affairs of out-of-state corporations (the
"Foreign State Business Combination Acts"). Defendants may seek to invoke these
other statutes in order to block plaintiffs' Offer, the Proposed Merger and the
Proxy Solicitation. Application of any use of these Foreign State Business
Combination Acts would violate the Commerce Clause and would conflict with the
Williams Act (Pub. L. 90-439, Sections 2, 3, 82 Stat. 454, 455 (July 29, 1968)
amending 15 U.S.C. Sections 78l through 78n) in violation of the Supremacy
Clause of the United States Constitution. Any action to use these foreign state
business combination acts to obstruct the Offer would constitute an

                                       25
<PAGE>
 
unreasonable response to the Offer and a breach of the Director Defendants'
fiduciary duties.

Foreign Litigation
- ------------------

      53. This forum provides defendants with a full opportunity to raise any
lawful defenses to the Offer, the Proposed Merger and the Proxy Solicitation.
Institution of litigation against plaintiffs in any other forum would constitute
an unreasonable response to the Offer and a breach of the Director Defendants'
fiduciary duties.

                               Irreparable Injury
                               ------------------

      54. Plaintiffs will be precluded from consummating the Offer (which is
conditioned on removal or inapplicability of Joslyn's anti-takeover devices),
plaintiffs will lose the unique and irreplaceable opportunity to acquire Joslyn,
and Joslyn's shareholders will lose the unique opportunity to sell their shares
for a substantial premium, unless the Court:
      (i) declares the September 1994 amendment to the Poison Pill invalid as a
breach of the Director Defendants' fiduciary duties;
      (ii) enjoins the application of Joslyn's Poison Pill to plaintiffs' Offer
and Proposed Merger;
      (iii)  orders the Director Defendants to approve the Offer pursuant to
Sections 7.85 and 11.75;
      (iv) enjoins the defendants from instigating litigation in any other
forum;

                                       26
<PAGE>
 
      (v) enjoins the application of any foreign state business combination
statute; and
      (vi) otherwise enjoins the application of any anti-takeover devices to
plaintiffs' Offer and enjoins Joslyn from impeding the Offer, the Proposed
Merger and the Proxy Solicitation by any other measures.

      55. Damages for these losses cannot readily be calculated and, in any
event, could not compensate for the unique loss that would have been suffered by
plaintiffs. Accordingly, plaintiffs have no adequate remedy at law.

                                   COUNT ONE
                                   ---------
                     (Unlawfulness of Continuing Directors
                           Provision of Poison Pill)

      56. Plaintiffs repeat, reallege and incorporate each allegation contained
in Paragraphs 1 through 55 of this Complaint as if fully set forth herein.

      57. The Continuing Directors Provision denies the shareholders, including
plaintiffs, of their statutory right to vote for and elect a Board comprised of
directors who can exercise their fiduciary duties to the shareholders.  The
lawfulness of a poison pill depends, among other things, upon the shareholders
retaining the ability to cause the poison pill to be redeemed or otherwise to
remove the poison pill as an obstacle to a desirable offer by replacing the
incumbent directors.  Joslyn's Continuing Directors Provision disenfranchises
Joslyn's shareholders and violates Section 7.40 of the Illinois

                                       27
<PAGE>
 
Business Corporation Act, 805 ILCS 5/7.40, which gives the shareholders the
right to elect directors, except as the Articles of Incorporation otherwise
provide.

      58. The Continuing Directors Provision further interferes with the
exercise of shareholders' voting rights, in violation of the Illinois Business
Corporation Act, by inducing votes for incumbents.  Shareholders who favor the
Offer will nevertheless be compelled to vote for the Continuing Directors if
only the Continuing Directors, and not any other nominees, will have the power
(however unlikely they are to use it) to take such basic, and critical steps as
redeeming the Rights or amending the Poison Pill.

      59. The Continuing Directors Provision selectively and unlawfully denies a
future Board powers that the current Board possesses including the powers and
authority expressly provided by Section 8.05 of the Illinois Business
Corporation Act, 805 ILCS 5/8.05.  By exclusively retaining the power to redeem
the Rights for itself and its hand-picked successors, and denying that very same
power to future boards duly elected by the shareholders, the Board exceeded its
statutory power, created an invidious distinction among classes of directors,
and deprived future non-Continuing Directors of the authority to carry out their
fiduciary duties and manage the corporation.  This creation of two classes of
directors with different powers, without any amendment to Joslyn's articles of
incorporation or express shareholder approval, is beyond the powers of the
Board.

      60. The Continuing Directors Provision also violates Section 6.05 of the
Illinois Business Corporation Act, 805 ILCS 5/6.05.  In authorizing poison
pills, Section 6.05 requires that the Board of Directors continue to exercise
their fiduciary

                                       28
<PAGE>
 
duties in connection with any poison pill.  Joslyn's Continuing Directors
Provision precludes an independent board of directors from fulfilling its
fiduciary duties in connection with poison pills and thereby violates Section
6.05.

      61. The September 1994 Amendment to the Poison Pill was taken in specific
response to Danaher's August 1994 purchase of shares in Joslyn and filing of a
Schedule 13D.  The Amendment was not proportionate to any threat posed nor in
the range of reasonable responses to Danaher's action, and was a breach of the
Director Defendants' fiduciary duties.

      62. Plaintiffs seek preliminary and permanent injunctive relief against
the application or enforcement of the Continuing Directors Provision, as well as
a declaratory judgment that this provision is invalid as contrary to Illinois
law.

      63. Plaintiffs have no adequate remedy at law.

                                   COUNT TWO
                                   ---------
                        (Declaratory Judgment Concerning
                          Application of Section 7.85)

      64. Plaintiffs repeat, reallege and incorporate each allegation contained
in Paragraphs 1 through 63 of this Complaint as if fully set forth herein.

      65. Directors must exercise their authority to determine beneficial
ownership of shares for purposes of Section 7.85 consistent with the limits of
their statutory authority and in conformity with their fiduciary duties and
other principles of Illinois corporate

                                       29
<PAGE>
 
law.  If plaintiffs are deemed beneficial owners within the meaning of Section
7.85, they will be subject to the permanent merger bar provisions of Section
7.85.

      66. The mere tendering of shares, which may be withdrawn pursuant to the
terms of the Offer and which will not be accepted and purchased in the event
that the Offer's conditions are not satisfied, does not constitute the transfer
of any of the incidents of ownership, and thus does not transfer "beneficial
ownership" of the shares within the meaning of Section 7.85.  Until the shares
are accepted for purchase, beneficial ownership remains solely in the tenderer.
As a matter of law, therefore, the Director Defendants do not have authority to,
and should be enjoined from, attributing beneficial ownership of tendered but
unaccepted shares to plaintiffs.

      67. Similarly, an entity does not acquire beneficial ownership of shares
within the meaning of Section 7.85 merely by reason of obtaining revocable
proxies (or authorizations to call a special meeting) with respect to 10 percent
or more of Joslyn's outstanding shares.  A revocable proxy is not "the right to
vote" stock within the meaning of Section 7.85.  The holder of a revocable proxy
is merely an agent with defeasible power to vote the shares in accordance with
the directions of the shareholder granting the proxy; that shareholder continues
to possess the exclusive right to vote those shares and may revoke the proxy at
any time.  A fortiori, obtaining shareholder authorization for calling a special
meeting (which must be held if requested by 20 percent or more of the
shareholders as required by Section 7.05 of the Illinois Business Corporation
Act, 805 ILCS 5/7.05) does not in any way constitute the transfer of any of the
incidents of

                                       30
<PAGE>
 
ownership, nor does it even affect how shares will be voted at the meeting.  As
a matter of law, the Director Defendants do not have authority to, and should be
enjoined from, attributing to plaintiffs beneficial ownership of shares based on
plaintiffs' obtaining authorization for the calling of a special meeting or
revocable proxies with respect to those shares.

      68. Section 7.85, like its counterpart provision Section 11.75, does not
contemplate that any of the events set forth in paragraphs 66 and 67 can vest
beneficial ownership.  Any legislative delegation of authority to the Board of
Directors to determine that such events vest beneficial ownership would
constitute an unconstitutional delegation of legislative and judicial authority
to a private party and would deprive plaintiffs of valuable property rights in
violation of Article IV, Section 1 of the Illinois Constitution and the Due
Process Clause of the United States Constitution.

      69. The foregoing uses of the Determination Authority would also
constitute an unreasonable response to Danaher's Offer in breach of the Director
Defendants' fiduciary duties.

      70. Plaintiffs seek preliminary and permanent injunctive relief against
any use of the Determination Authority to determine that the tender of shares
prior to acceptance, the receipt of authorizations to call a special meeting, or
the grant of revocable proxies make plaintiffs an "Interested Shareholder," as
well as a declaratory judgment that such a determination would be inconsistent
with the Illinois Business Corporation Act, the Director Defendants' fiduciary
duties, and the limit of the Director Defendants' authority.

                                       31
<PAGE>
 
      71.  Plaintiffs have no adequate remedy at law.

                                  COUNT THREE
                                  -----------
                          (Breach of Fiduciary Duties)

      72. Plaintiffs repeat, reallege and incorporate each allegation contained
in Paragraphs 1 through 71 of this Complaint as if fully set forth herein.

      73. The Director Defendants, who vested themselves with the preclusive
power of the Poison Pill, are bound by their fiduciary obligations to observe
the highest and most stringent duties of loyalty, care, candor and good faith in
determining how and when that power should be used.  Section 6.05 of the
Illinois Business Corporation Act, 805 ILCS 5/6.05, which authorizes flip-in
poison pill rights plans, provides that nothing therein shall affect the
"fiduciary obligations of the board of directors of a corporation . . . in the
taking or failing to take any action with respect to such rights."  The Director
Defendants' obligation to properly exercise their fiduciary duties is
particularly important in the context of a proposed change-of-control
transaction, which raises the specter that the Director Defendants may be acting
primarily in their own interests (to preserve their directorships), rather than
in the best interests of the corporation and its shareholders.

      74. The Director Defendants are obligated by reason of their fiduciary
duties, not to use the Poison Pill to block acquisition proposals unless, after
a good faith and reasonable investigation, the Board has reasonable grounds for
believing that the proposal poses a real and substantial threat to the
corporation and its shareholders.

                                       32
<PAGE>
 
      75.  Similarly, the Director Defendants are obligated not to use Sections
7.85 and 11.75 of the Illinois Business Corporations Act to rebuff acquisition
proposals unless, after a good faith and reasonable investigation, the Board has
reasonable grounds for believing that the proposal poses a real and substantial
threat to the shareholders.

      76. Plaintiffs' Offer is non-coercive and non-discriminatory; it is fair
to Joslyn stockholders; and it represents a substantial premium over the market
price of Joslyn shares prior to announcement of the Proposal.  The Offer, the
Proposed Merger and the Proxy Solicitation comply with all applicable laws,
obligations and agreements and pose no threat to the interests of Joslyn's
stockholders or to Joslyn's corporate policy or effectiveness.

      77. Use of Joslyn's anti-takeover devices or any other defensive measures,
including the Poison Pill and Sections 7.85 and 11.75, to prevent Joslyn
stockholders from deciding for themselves whether or not to accept the Offer is
not proportionate to any threat posed, nor within the range of reasonable
responses to the Offer, the Proposed Merger or the Proxy Solicitation and would
constitute a breach of the Director Defendants' fiduciary duties.

      78. Defendants have indicated that they will employ all appropriate
measures to rebuff plaintiffs' Offer and thus are likely to refuse to redeem the
Rights (or to amend the Poison Pill to make it inapplicable to the Offer and the
Proposed Merger) or approve the Offer and the Proposed Merger to satisfy the
provisions of Sections 11.75 and 7.85.

                                       33
<PAGE>
 
      79.  The refusal to redeem the Rights (or to amend the Poison Pill) and
the refusal to approve the Offer and the Proposed Merger under these
circumstances serves an improper purpose -- entrenchment of the defendants and
Joslyn's management -- at the direct expense of Joslyn's shareholders, and
constitutes a breach by the Director Defendants of their fiduciary duties.

      80. Plaintiffs seek preliminary and permanent injunctive relief against
these breaches of fiduciary duties, including but not limited to any breaches
caused by the Director Defendants':

      (i) failure to redeem the Rights;
      (ii) failure to amend the Poison Pill to make it inapplicable to the Offer
and Proposed Merger;
      (iii)  failure to approve the Offer and Proposed Merger; or
      (iv) adoption of any new defensive measures designed to thwart or block
the Offer.
      81. Plaintiffs have no adequate remedy at law.

                                   COUNT FOUR
                                   ----------
                     (No Commencement of Other Proceedings)

      82. Plaintiffs repeat, reallege and incorporate each allegation contained
in Paragraphs 1 through 81 of this Complaint as if fully set forth herein.

      83. Illinois is both the state of incorporation and the headquarters of
Joslyn. This Court is therefore a proper and convenient forum for the litigation
of any claims

                                       34
<PAGE>
 
between the parties relating to the Offer, the Proposed Merger or the Proxy
Solicitation. To prevent any unnecessary impediment to consummation of the
Offer, the Proposed Merger and the Proxy Solicitation, plaintiffs seek
declaratory and injunctive relief against Joslyn's commencement of proceedings
in any forum other than this Court which would impede the commencement,
continuation or consummation of these transactions.

      84. Plaintiffs have no adequate remedy at law.

                                   COUNT FIVE
                                   ----------
           (Inapplicability of Foreign State Anti-Takeover Statutes)

      85. Plaintiffs repeat, reallege and incorporate each allegation contained
in Paragraphs 1 through 84 of this Complaint as if fully set forth herein.

      86. Subject to the constitutional constraints set forth below, Illinois is
the only state possessing authority to regulate Joslyn's internal corporate
affairs.  Nevertheless, a number of states have adopted anti-takeover
legislation purporting to control the internal affairs of out-of-state companies
such as Joslyn by, among other things, purporting to control the ability of a
tender offeror to make a tender offer, the ability of such a tender offeror to
vote shares sold to it during a tender offer, and the ability of such a tender
offeror to merge or otherwise combine with the corporation after a tender offer.
Defendants may seek to invoke these other statutes in order to block plaintiffs'
Offer, the Proposed Merger and the Proxy Solicitation.

      87. Because Joslyn is an Illinois corporation, any attempt by defendants
to invoke a Foreign State Business Combination Act in connection with the Offer
or the

                                       35
<PAGE>
 
Proposed Merger would create an unconstitutional burden on interstate commerce.
If applied to the Offer, the Proposed Merger or the Proxy Solicitation, Foreign
State Business Combination Acts would impose substantial and adverse burdens
upon interstate commerce, including, but not limited to, the following:
      (i) inhibiting plaintiffs from making a nationwide tender offer, as well
as from engaging in the Proposed Merger with Joslyn;
      (ii) depriving Joslyn's stockholders throughout the United States of the
opportunity to sell their shares at a premium above the unaffected market price
in a transaction wholly in compliance with United States law; and
      (iii)  creating unnecessary, burdensome, and wasteful expenses for
companies engaged in interstate commerce and for persons wishing to use
interstate or national facilities as instrumentalities for the purchase and sale
of securities.

      88. The rights of Joslyn's stockholders (including plaintiffs) are created
and guaranteed by Illinois law.  Application of Foreign State Business
Combination Acts to the Offer, the Proposed Merger or the Proxy Solicitation
would alter those rights or restrict them in ways that Illinois law does not
and, as such, fail to give full faith and credit to Illinois law.

      89. The threat of inconsistent regulation created by Foreign State
Business Combination Acts and the burden of complying with those inconsistent
regulations will impermissibly impede the Offer in a manner inconsistent with
the Williams Act (Pub. L. 90-439, Sections 2, 3, 82 Stat. 454, 455 (July 29,
1968), amending 15 U.S.C. Sections 78l through

                                       36
<PAGE>
 
78n).  As a result, any attempt to apply any Foreign State Business Combination
Act to the Offer, the Proposed Merger or the Proxy Solicitation would conflict
with the Williams Act and would thus violate the Supremacy Clause of the United
States Constitution.

      90. In order to avoid the unconstitutional application of inconsistent
statutes to the Offer and to eliminate the uncertainty concerning the laws with
which plaintiffs must comply to complete the Offer, the Proposed Merger and the
Proxy Solicitation, plaintiffs seek a judgment:
      (i) declaring that any purported application of any Foreign State Business
Combination Act to the Offer violates the United States Constitution and the
Williams Act; and
      (ii) preliminarily and permanently enjoining defendants from commencing
any action, claim or proceeding in any forum in order to invoke any Foreign
State Business Combination Act with respect to the Offer.

      91. Plaintiffs have no adequate remedy at law.

                               PRAYER FOR RELIEF
                               -----------------

      WHEREFORE, plaintiffs respectfully request that this Court enter an order:
      (i) declaring and adjudging that the Continuing Directors provision is
invalid, null and void and preliminarily and permanently enjoining the operation
thereof;

                                       37
<PAGE>
 
      (ii) declaring that the Director Defendants have no authority under
Section 7.85 to determine that the tender of shares to plaintiffs prior to the
actual acceptance of such shares for purchase, the receipt of authorizations to
call a special meeting or the grant of revocable proxies pursuant to the Proxy
Solicitation vest beneficial ownership of the underlying stock in plaintiffs or
render them "Interested Shareholders" for purposes of that provision, and
preliminarily and permanently enjoining the Director Defendants from making that
purported determination;
      (iii)  preliminarily and permanently enjoining defendants, their officers,
successors, agents, servants, subsidiaries, employees and attorneys, and all
persons acting in concert or participating with them or any of them, from taking
any steps to impede or frustrate the ability of Joslyn's stockholders to
consider and make their own determination as to whether to accept the terms of
the Offer or give or withhold consent to the terms of the Proxy Solicitation, or
taking any other action to thwart or interfere with the Offer, the Proposed
Merger or the Proxy Solicitation;
      (iv) compelling the Director Defendants to redeem the Rights associated
with the Poison Pill or to amend the Poison Pill so as to make the Rights
inapplicable to the Offer and the Proposed Merger, and preliminarily and
permanently enjoining defendants, their officers, successors, agents, servants,
subsidiaries, employees and attorneys, and all persons acting in concert or
participation with them or any of them, from taking any action to implement, 
distribute or recognize any rights or powers with respect to said Rights (other
than to

                                       38
<PAGE>
 
redeem the Rights or amend the Poison Pill to make it inapplicable), and from
taking any actions pursuant to the Poison Pill that would dilute or interfere
with plaintiffs' voting rights or in any other way discriminate against
plaintiffs in the exercise of their rights with respect to their Joslyn stock;
      (v) compelling the Director Defendants to approve the Offer and the
Proposed Merger for the purposes of Sections 7.85 and 11.75, and preliminarily
and permanently enjoining defendants, their officers, successors, agents,
servants, subsidiaries, employees and attorneys, and all persons acting in
concert or participation with them or any of them, from taking any actions to
enforce or apply Sections 7.85 or 11.75 that would interfere with the
commencement, continuation or consummation of plaintiffs' Offer;
      (vi) declaring and adjudging that the Offer, the Proposed Merger and the
Proxy Solicitation comply with all applicable laws, obligations and agreements,
including, without limitation, the securities laws, the antitrust laws, and all
other legal obligations to which plaintiffs are subject, including any
contractual and common law obligations that may be owed by plaintiffs to Joslyn;
      (vii) declaring and adjudging that Joslyn, its directors, officers,
successors, agents, servants, subsidiaries, employees and attorneys, and all
persons acting in concert or participation with them, may not commence, and
preliminarily and permanently enjoining them from commencing, in any forum other
than this Court, any judicial proceedings that would require litigation, by way
of claim, defense or

                                       39
<PAGE>
 
counterclaim, or any of the claims, defenses or counterclaims which may be
asserted in this lawsuit and that would delay or impede commencement,
continuation or consummation of the Offer, the Proposed Merger or the Proxy
Solicitation, including, without limitation, any proceedings challenging the
Offer, the Proposed Merger or the Proxy Solicitation or seeking to enforce or
apply any of Joslyn's anti-takeover devices;
      (viii) declaring and adjudging that the application of any Foreign State
Business Combination Act to the Offer, Proposed Merger or Proxy Solicitation is
unconstitutional, and preliminarily and permanently enjoining defendants, their
officers, successors, agents, servants, subsidiaries, employees and attorneys,
and all persons acting in concert or participation with them or any of them,
from taking any actions to make, apply or enforce the provisions of any such
Foreign State Business Combination Act;
      (ix) awarding plaintiffs their costs and disbursements in this action,
including reasonable attorneys' fees; and

                                       40
<PAGE>
 
      (x) granting such other and further relief as to the Court seems just and
proper.

Dated:  Chicago, Illinois
        July 24, 1995

                                 DANAHER CORPORATION
                                 and TK ACQUISITION
                                 CORPORATION


                                 By:_______________________________________
                                      One of Their Attorneys
                                 Theodore R. Tetzlaff (02812177)
                                 Rodney D. Joslin (01370502)
                                 David J. Bradford (00272094)
                                 Norman M. Hirsch (06184003)
                                 JENNER & BLOCK
                                 One IBM Plaza
                                 Chicago, IL  60611
                                 (312) 222-9350

Of Counsel:
   John H. Hall
   Gary W. Kubek
   David H. Bernstein
   Angela O. Burton
   DEBEVOISE & PLIMPTON
   875 Third Avenue
   New York, NY  10022
   (212) 909-6000

                                       41


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