TYLAN GENERAL INC
8-K, 1996-07-03
INDUSTRIAL INSTRUMENTS FOR MEASUREMENT, DISPLAY, AND CONTROL
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<PAGE>   1
                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT
                     PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

         Date of Report (Date of earliest event reported): JULY 2, 1996

                               TYLAN GENERAL, INC.
             (Exact name of registrant as specified in its charter)

                                    DELAWARE
                 (State or other jurisdiction of incorporation)

      0-25376                                          04-2659273
(Commission File No.)                        (IRS Employer Identification No.)

                             15330 AVENUE OF SCIENCE
                           SAN DIEGO, CALIFORNIA 92128
              (Address of principal executive offices and zip code)

       Registrant's telephone number, including area code: (619) 618-1990

<PAGE>   2
ITEM 5.  OTHER EVENTS.

         On July 2, 1996, the Board of Directors of Tylan General, Inc. (the
"CORPORATION") declared a dividend distribution of one preferred share purchase
right (a "RIGHT") for each outstanding share of Common Stock, par value $0.001
per share (the "COMMON SHARES"), of the Corporation. The dividend is payable to
the stockholders of record on July 15, 1996 (the "RECORD DATE"), and with
respect to Common Shares issued thereafter until the Distribution Date (as
defined below) and, in certain circumstances, with respect to Common Shares
issued after the Distribution Date. Except as set forth below, each Right, when
it becomes exercisable, entitles the registered holder to purchase from the
Corporation one one-hundredth of a share of Series A Junior Participating
Preferred Stock, without par value (the "PREFERRED SHARES"), of the Corporation
at a price of $70.00 per one one-hundredth of a Preferred Share (the "PURCHASE
PRICE"), subject to adjustment. The description and terms of the Rights are set
forth in a Rights Agreement (the "RIGHTS AGREEMENT") between the Corporation and
The First National Bank of Boston, as Rights Agent (the "RIGHTS AGENT"), dated
as of July 2, 1996.

         Initially, the Rights will be attached to all certificates representing
Common Shares then outstanding, and no separate Right Certificates will be
distributed. The Rights will separate from the Common Shares upon the earliest
to occur of (i) a person or group of affiliated or associated persons having
acquired beneficial ownership of 15% or more of the outstanding Common Shares
(except pursuant to a Permitted Offer, as hereinafter defined); or (ii) 10 days
(or such later date as the Board may determine) following the commencement of,
or announcement of an intention to make, a tender offer or exchange offer the
consummation of which would result in a person or group becoming an Acquiring
Person (as hereinafter defined) (the earliest of such dates being called the
"DISTRIBUTION DATE"). A person or group whose acquisition of Common Shares
causes a Distribution Date pursuant to clause (i) above is an "ACQUIRING
PERSON." The date that a person or group becomes an Acquiring Person is the
"SHARES ACQUISITION DATE."

         The Rights Agreement provides that, until the Distribution Date, the
Rights will be transferred with and only with the Common Shares. Until the
Distribution Date (or earlier redemption or expiration of the Rights) new Common
Share certificates issued after the Record Date upon transfer or new issuance of
Common Shares will contain a notation incorporating the Rights Agreement by
reference. Until the Distribution Date (or earlier redemption or expiration of
the Rights), the surrender for transfer of any certificates for Common Shares
outstanding as of the Record Date, even without such notation or a copy of this
Summary of Rights being attached thereto, will also constitute the transfer of
the Rights associated with the Common Shares represented by such certificate. As
soon as practicable following the Distribution Date, separate certificates
evidencing the Rights ("RIGHT CERTIFICATES") will be mailed to holders of record
of the Common Shares as of the close of business on the Distribution Date (and
to each initial 

                                       2.
<PAGE>   3
record holder of certain Common Shares issued after the Distribution Date), and
such separate Right Certificates alone will evidence the Rights.

         THE RIGHTS ARE NOT EXERCISABLE UNTIL THE DISTRIBUTION DATE and will
expire at the close of business on July 2, 2006, unless earlier redeemed by the
Corporation as described below.

         In the event that any person becomes an Acquiring Person (except
pursuant to a tender or exchange offer which is for all outstanding Common
Shares at a price and on terms which a majority of certain members of the Board
of Directors determines to be adequate and in the best interests of the
Corporation, its stockholders and other relevant constituencies, other than such
Acquiring Person, its affiliates and associates (a "PERMITTED OFFER")), each
holder of a Right will thereafter have the right (the "FLIP-IN RIGHT") to
receive upon exercise the number of Common Shares or of one-hundredths of a
share of Preferred Shares (or, in certain circumstances, other securities of the
Corporation) having a value (immediately prior to such triggering event) equal
to two times the exercise price of the Right. Notwithstanding the foregoing,
following the occurrence of the event described above, all Rights that are, or
(under certain circumstances specified in the Rights Agreement) were,
beneficially owned by any Acquiring Person or any affiliate or associate thereof
will be null and void.

         In the event that, at any time following the Shares Acquisition Date,
(i) the Corporation is acquired in a merger or other business combination
transaction in which the holders of all of the outstanding Common Shares
immediately prior to the consummation of the transaction are not the holders of
all of the surviving corporation's voting power, or (ii) more than 50% of the
Corporation's assets or earning power is sold or transferred, in either case
with or to an Acquiring Person or any affiliate or associate or any other person
in which such Acquiring Person, affiliate or associate has an interest or any
person acting on behalf of or in concert with such Acquiring Person, affiliate
or associate, or, if in such transaction all holders of Common Shares are not
treated alike, any other person, then each holder of a Right (except Rights
which previously have been voided as set forth above) shall thereafter have the
right (the "FLIP-OVER RIGHT") to receive, upon exercise, common shares of the
acquiring company having a value equal to two times the exercise price of the
Right. The holder of a Right will continue to have the Flip-Over Right whether
or not such holder exercises or surrenders the Flip-In Right.

         The Purchase Price payable, and the number of Preferred Shares, Common
Shares or other securities issuable, upon exercise of the Rights are subject to
adjustment from time to time to prevent dilution (i) in the event of a stock
dividend on, or a subdivision, combination or reclassification of, the Preferred
Shares, (ii) upon the grant to holders of the Preferred Shares of certain rights
or warrants to subscribe for or purchase Preferred Shares at a price, or
securities convertible into Preferred Shares with a conversion price, 

                                       3.
<PAGE>   4
less than the then current market price of the Preferred Shares or (iii) upon
the distribution to holders of the Preferred Shares of evidences of indebtedness
or assets (excluding regular quarterly cash dividends) or of subscription rights
or warrants (other than those referred to above).

         The number of outstanding Rights and the number of one one-hundredths
of a Preferred Share issuable upon exercise of each Right are also subject to
adjustment in the event of a stock split of the Common Shares or a stock
dividend on the Common Shares payable in Common Shares or subdivisions,
consolidations or combinations of the Common Shares occurring, in any such case,
prior to the Distribution Date.

         Preferred Shares purchasable upon exercise of the Rights will not be
redeemable. Each Preferred Share will be entitled to a minimum preferential
quarterly dividend payment of $1.00 per share but, if greater, will be entitled
to an aggregate dividend per share of 100 times the dividend declared per Common
Share. In the event of liquidation, the holders of the Preferred Shares will be
entitled to a minimum preferential liquidation payment of $100 per share;
thereafter, and after the holders of the Common Shares receive a liquidation
payment of $1.00 per share, the holders of the Preferred Shares and the holders
of the Common Shares will share the remaining assets in the ratio of 100 to 1
(as adjusted) for each Preferred Share and Capital Share so held, respectively.
Finally, in the event of any merger, consolidation or other transaction in which
Common Shares are exchanged, each Preferred Share will be entitled to receive
100 times the amount received per Common Share. These rights are protected by
customary antidilution provisions. In the event that the amount of accrued and
unpaid dividends on the Preferred Shares is equivalent to six full quarterly
dividends or more, the holders of the Preferred Shares shall have the right,
voting as a class, to elect two directors in addition to the directors elected
by the holders of the Common Shares until all cumulative dividends on the
Preferred Shares have been paid through the last quarterly dividend payment date
or until non-cumulative dividends have been paid regularly for at least one
year.

         With certain exceptions, no adjustment in the Purchase Price will be
required until cumulative adjustments require an adjustment of at least 1% in
such Purchase Price. No fractional Preferred Shares will be issued (other than
fractions which are one one-hundredth or integral multiples of one one-hundredth
of a Preferred Share, which may, at the election of the Corporation, be
evidenced by depositary receipts) and in lieu thereof, an adjustment in cash
will be made based on the market price of the Preferred Shares on the last
trading day prior to the date of exercise.

         At any time after a person becomes an Acquiring Person and prior to the
acquisition by such person or group of 50% or more of the Common Shares, the
Board of Directors of the Company may exchange the Rights (other than the Rights
owned by the 

                                       4.
<PAGE>   5
Acquiring Person or its Associates and Affiliates, which shall have become void)
at an exchange ratio of one Common Shares per Right (subject to Adjustment).

         At any time prior to the earlier to occur of (i) a person becoming an
Acquiring Person or (ii) the expiration of the Rights, and under certain other
circumstances, the Corporation may redeem the Rights in whole, but not in part,
at a price of $.01 per Right (the "REDEMPTION PRICE") which redemption shall be
effective upon the action of the Board of Directors. Additionally, following the
Shares Acquisition Date, the Corporation may redeem the then outstanding Rights
in whole, but not in part, at the Redemption Price, provided that such
redemption is in connection with a merger or other business combination
transaction or series of transactions involving the Corporation in which all
holders of Common Shares are treated alike but not involving an Acquiring Person
or its affiliates or associates and provided, further that this redemption right
shall not exist for 365 days following the Shares Acquisition Date under certain
circumstances.

         All of the provisions of the Rights Agreement may be amended by the
Board of Directors of the Corporation prior to the Distribution Date. After the
Distribution Date, the provisions of the Rights Agreement may be amended by the
Board in order 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, subject to certain limitations, to
shorten or lengthen any time period under the Rights Agreement.

         Until a Right is exercised, the holder thereof, as such, will have no
rights as a stockholder of the Corporation, including, without limitation, the
right to vote or to receive dividends. While the distribution of the Rights will
not be taxable to stockholders of the Corporation, stockholders may, depending
upon the circumstances, recognize taxable income should the Rights become
exercisable or upon the occurrence of certain events thereafter.

         A copy of the Rights Agreement is available free of charge from the
Corporation. This summary description of the Rights does not purport to be
complete and is qualified in its entirety by reference to the Rights Agreement.

                                       5.
<PAGE>   6
ITEM 7.  FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS.

         (c)      EXHIBITS.

                  99.1     Specimen Right Certificate.

                  99.2     Rights Agreement, dated as of July 2, 1996, between 
                           Tylan General, Inc. and The First National Bank of 
                           Boston, as Rights Agent.

                  99.3     Press release, dated July 3, 1996.

                                       6.
<PAGE>   7
                                   SIGNATURES

         Pursuant to the requirements of the Securities Exchange Act of 1934,
the Registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.

                                     TYLAN GENERAL, INC.

Dated:  July 2, 1996                 By:      DAVID J. FERRAN
                                        ---------------------
                                         David J. Ferran
                                         President and Chief Executive Officer

                                       7.
<PAGE>   8


                                INDEX TO EXHIBITS

                                                                        PAGE NO.

         99.1     Specimen Right Certificate.

         99.2     Rights Agreement, dated as of July 2, 1996, between Tylan 
                  General, Inc. and The First National Bank of Boston, as Rights
                  Agent.

         99.3     Press release, dated July 3, 1996.

                                       8.

<PAGE>   1
                                                                    EXHIBIT 99.1

                            Form of Right Certificate

Certificate No. R-                                          __________ Rights

        NOT EXERCISABLE AFTER JULY 2, 2006 OR EARLIER IF REDEEMED BY THE
        CORPORATION. THE RIGHTS ARE SUBJECT TO REDEMPTION AT $.01 PER RIGHT ON
        THE TERMS SET FORTH IN THE RIGHTS AGREEMENT.

                                Right Certificate

                               Tylan General, Inc.

        This certifies that ____________________, or registered assigns, is the
registered owner of the number of Rights set forth above, each of which entitles
the owner thereof, subject to the terms, provisions and conditions of the Rights
Agreement, dated as of July 2, 1996 (the "RIGHTS AGREEMENT"), between Tylan
General, Inc., a Delaware corporation (the "CORPORATION"), and The First
National Bank of Boston (the "RIGHTS AGENT"), to purchase from the Corporation
at any time after the Distribution Date (as such term is defined in the Rights
Agreement) and prior to 5:00 P.M., San Diego time, on July 2, 2006, unless the
Rights evidenced hereby shall have been previously redeemed or exchanged by the
Corporation, at the principal office or offices of the Rights Agent designated
for such purpose, or at the office of its successor as Rights Agent, one
one-hundredth of a fully paid non-assessable share of Series A Junior
Participating Preferred Stock, without par value (the "PREFERRED Shares"), of
the Corporation, at a purchase price of $70.00 per one one-hundredth of
Preferred Share (the "PURCHASE PRICE"), upon presentation and surrender of this
Right Certificate with the Form of Election to Purchase duly executed. The
number of Rights evidenced by this Right Certificate (and the number of one
one-hundredths of a Preferred Share which may be purchased upon exercise hereof)
set forth above, and the Purchase Price set forth above, are the number and
Purchase Price as of July 2, 1996, based on the Preferred Shares as constituted
at such date.

                                       -1
<PAGE>   2
         Upon the occurrence of a Section 11(a)(ii) Event (as such term is
defined in the Rights Agreement), if the Rights evidenced by this Right
Certificate are beneficially owned by (i) an Acquiring Person or an Affiliate or
Associate of any such Acquiring Person (as such terms are defined in the Rights
Agreement), (ii) a transferee of any such Acquiring Person, Associate or
Affiliate who becomes a transferee after the Acquiring Person becomes such, or
(iii) under certain circumstances specified in the Rights Agreement, a
transferee of any such Acquiring Person, Associate or Affiliate who becomes a
transferee prior to or concurrently with the Acquiring Person becoming such,
such Rights shall become null and void and no holder hereof shall have any right
with respect to such Rights from and after the occurrence of such Section
11(a)(ii) Event.

         As provided in the Rights Agreement, the Purchase Price and the number
of one one-hundredth of a Preferred Share or other securities which may be
purchased upon the exercise of the Rights evidenced by this Right Certificate
are subject to modification and adjustment upon the happening of certain events,
including Triggering Events (as such term is defined in the Rights Agreement).

         This Right Certificate is subject to all of the terms, provisions and
conditions of the Rights Agreement, which terms, provisions and conditions are
hereby incorporated herein by reference and made a part hereof and to which
Rights Agreement reference is hereby made for a full description of the rights,
limitations of rights, obligations, duties and immunities hereunder of the
Rights Agent, the Corporation and the holders of the Right Certificates, which
limitations of rights include the temporary suspension of the exercisability of
such Rights under the specific circumstances set forth in the Rights Agreement.
Copies of the Rights Agreement are on file at the principal executive offices of
the Corporation and the principal office or offices of the Rights Agent.

         This Right Certificate, with or without other Right Certificates, upon
surrender at the principal office of the Rights Agent, may be exchanged for
another Right Certificate or Right Certificates of like tenor and date
evidencing Rights entitling the holder to purchase a like aggregate number of
Preferred Shares or other securities as the Rights evidenced by the Right
Certificate or Right Certificates surrendered shall have entitled such holder to
purchase. If this Right Certificate shall be exercised in part, the holder shall
be entitled to receive upon surrender hereof another Right Certificate or Right
Certificates for the number of whole Rights not exercised.

         Subject to the provisions of the Rights Agreement, the Rights evidenced
by this Certificate may be redeemed by the Corporation at a redemption price of
$.01 per Right (subject to adjustment as provided in the Rights Agreement)
payable in cash.

                                       2
<PAGE>   3
         No fractional Preferred Shares will be issued upon the exercise of any
Right or Rights evidenced hereby (other than fractions which are one
one-hundredth or integral multiples of one one-hundredth of a Preferred Share,
which may, at the election of the Corporation, be evidenced by depositary
receipts), but in lieu thereof a cash payment will be made, as provided in the
Rights Agreement.

         No holder of this Right Certificate shall be entitled to vote or
receive dividends or be deemed for any purpose the holder of the Preferred
Shares or of any other securities of the Corporation which may at any time be
issuable on the exercise hereof, nor shall anything contained in the Rights
Agreement or herein be construed to confer upon the holder hereof, as such, any
of the rights of a stockholder of the Corporation or any right to vote for the
election of directors or upon any matter submitted to stockholders at any
meeting thereof, or to give or withhold consent to any corporate action, or to
receive notice of meetings or other actions affecting stockholders (except as
provided in the Rights Agreement), or to receive dividends or other
distributions or to exercise any preemptive or subscription rights, or
otherwise, until the Right or Rights evidenced by this Right Certificate shall
have been exercised as provided in the Rights Agreement.

         This Right Certificate shall not be valid or obligatory for any purpose
until it shall have been countersigned by the Rights Agent.

         WITNESS the facsimile signature of the proper officers of the
Corporation and its corporate seal. Dated as of __________.

[SEAL]
ATTEST:                                   TYLAN GENERAL, INC.

By                                        By
  ------------------------------------       ----------------------------------
  David L. Stone                             David J. Ferran
  Executive Vice President, Chief            Chairman of the Board, President
   Financial Officer and Secretary            and Chief Executive Officer

Countersigned:

THE FIRST NATIONAL BANK OF BOSTON,
  as Rights Agent



By:_________________________
    Authorized Signatory

                                       -3
<PAGE>   4

                    Form of Reverse Side of Right Certificate

                               FORM OF ASSIGNMENT

                (To be executed by the registered holder if such
               holder desires to transfer the Right Certificate.)

FOR VALUE RECEIVED _________________________ hereby sells, assigns and transfers
unto___________________________________________________________________________
                  (Please print name and address of transferee)

this Right Certificate, together with all right, title and interest therein, and
does hereby irrevocably constitute and appoint _______________ Attorney, to
transfer the within Right Certificate on the books of the within-named
Corporation, with full power of substitution.

Dated:________________, _____

                                                           ____________________
                                                           Signature

Signature Guaranteed:

         Signatures must be guaranteed by a member firm of a registered national
securities exchange, a member of the National Association of Securities Dealers,
Inc., or a commercial bank or trust company having an office or correspondent in
the United States.

_______________________________________________________________________________

         The undersigned hereby certifies that (1) the Rights evidenced by this
Right Certificate are not being sold, assigned or transferred by or on behalf of
a Person who is or was an Acquiring Person or an Affiliate or Associate thereof
(as such terms are defined in the Right Agreement) and (2) after due inquiry and
to the best knowledge of the undersigned, the undersigned did not acquire the
Rights evidenced by this Right Certificate from any Person who is or was an
Acquiring Person or an Affiliate or Associate thereof (as such terms are defined
in the Rights Agreement).

                                                           ____________________
                                                           Signature

                                       -4
<PAGE>   5
             Form of Reverse Side of Right Certificate -- continued

                          FORM OF ELECTION TO PURCHASE

                    (To be executed by the registered holder
                    if such holder desires to exercise Rights
                     represented by the Right Certificate.)

To the Rights Agent:

         The undersigned hereby irrevocably elects to exercise
__________________ Rights represented by this Right Certificate to purchase the
Preferred Shares, Common Shares or other securities issuable upon the exercise
of such Rights and requests that certificates for such Preferred Shares, Common
Shares or other securities be issued in the name of:

Please insert social security or other identifying number:_____________________


___________________________________________
(Please print name and address)

_______________________________________________________________________________

If such number of Rights shall not be all the Rights evidenced by this Right
Certificate, a new Right Certificate for the balance remaining of such Rights
shall be registered in the name of and delivered to:

Please insert social security or other identifying number:_____________________


___________________________________________ 
(Please print name and address)             

_______________________________________________________________________________

Dated:___________________, _____

                                                           ____________________
                                                           Signature

                                       -5
<PAGE>   6
                Form of Reverse Side of Right Certificate -- continued.

Signature Guaranteed:

         Signatures must be guaranteed by a member firm of a registered national
securities exchange, a member of the National Association of Securities Dealers,
Inc., or a commercial bank or trust company having an office or correspondent in
the United States.

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

The undersigned hereby certifies that (1) the Rights evidenced by this Right
Certificate are not being exercised by or on behalf of a Person who is or was an
Acquiring Person or an Affiliate or Associate thereof (as such terms are defined
in the Rights Agreement) and (2) after due inquiry and to the best knowledge of
the undersigned, the undersigned did not acquire the Rights evidenced by this
Rights Certificate from any Person who is or was an Acquiring Person or an
Affiliate or Associate thereof (as such terms are defined in the Rights
Agreement).

                                                           --------------------
                                                           Signature

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

                                     NOTICE

         The signature on the foregoing Forms of Assignment and Election and
certificates must conform to the name as written upon the face of this Right
Certificate in every particular, without alteration or enlargement or any change
whatsoever.

         In the event the certification set forth above in the Form of
Assignment or the Form of Election to Purchase, as the case may be, is not
completed, the Corporation and the Rights Agent will deem the Beneficial Owner
of the Rights evidenced by this Right Certificate to be an Acquiring Person or
an Affiliate or Associate thereof (as such terms are defined in the Rights
Agreement) and such Assignment or Election to Purchase will not be honored.

                                       6

<PAGE>   1
                                                                    EXHIBIT 99.2

                               TYLAN GENERAL, INC.

                                       AND

                        THE FIRST NATIONAL BANK OF BOSTON
                                 AS RIGHTS AGENT

                                RIGHTS AGREEMENT

                            DATED AS OF JULY 2, 1996
<PAGE>   2
                                TABLE OF CONTENTS

<TABLE>  
<CAPTION>
                                                                                                                  PAGE
<S>                        <C>                                                                                    <C>
         Section 1.        Certain Definitions .................................................................   1
         Section 2.        Appointment of Rights Agent .........................................................   5
         Section 3.        Issuance of Right Certificates ......................................................   6
         Section 4.        Form of Right Certificate ...........................................................   7
         Section 5.        Countersignature and Registration ...................................................   8
         Section 6.        Transfer, Split-Up, Combination and Exchange of Right Certificates;
                           Mutilated, Destroyed, Lost or Stolen Right Certificate...............................   9
         Section 7.        Exercise of Rights; Purchase Price; Expiration Date of Rights .......................  10
         Section 8.        Cancellation and Destruction of Right Certificates...................................  12
         Section 9.        Reservation and Availability of Preferred Shares.....................................  12
         Section 10.       Preferred Shares Record Date.........................................................  14
         Section 11.       Adjustment of Purchase Price, Number and Kind of Shares or Number of
                           Rights...............................................................................  14
         Section 12.       Certificate of Adjusted Purchase Price or Number of Shares...........................  21
         Section 13.       Consolidation, Merger or Sale or Transfer of Assets or Earning Power.................  22
         Section 14.       Fractional Rights and Fractional Shares..............................................  24
         Section 15.       Rights of Action.....................................................................  26
         Section 16.       Agreement of Right Holders...........................................................  26
         Section 17.       Right Certificate Holder Not Deemed a Stockholder....................................  27
         Section 18.       Concerning the Rights Agent..........................................................  27
         Section 19.       Merger or Consolidation or Change of Name of Rights Agent............................  28
         Section 20.       Duties of Rights Agent...............................................................  29
         Section 21.       Change of Rights Agent...............................................................  32
         Section 22.       Issuance of New Right Certificates...................................................  32
         Section 23.       Redemption and Termination...........................................................  33
         Section 24.       Exchange.............................................................................  35
         Section 25.       Notice of Certain Events.............................................................  36
         Section 26.       Notices..............................................................................  37
         Section 27.       Supplements and Amendments...........................................................  37
         Section 28.       Determination and Actions by the Board of Directors, etc.............................  38
         Section 29.       Successors...........................................................................  39
</TABLE>

                                       i.
<PAGE>   3
                               TABLE OF CONTENTS
                                  (CONTINUED)
<TABLE>
<CAPTION>
                                                                                                                 PAGE
<S>                        <C>                                                                                    <C>
         Section 30.       Benefits of this Agreement...........................................................  39
         Section 31.       Severability.........................................................................  39
         Section 32.       Governing Law........................................................................  39
         Section 33.       Counterparts.........................................................................  39
         Section 34.       Descriptive Headings.................................................................  40
</TABLE>

                                       ii.
<PAGE>   4
                       DEFINED TERM CROSS REFERENCE SHEET

<TABLE>
<S>                                                           <C>            
Acquiring Person...........................................   Section 1(a)           
Act........................................................   Section 1(b)
Adjustment Shares..........................................   Section 11(a)(ii)
Adjusted Number of Shares..................................   Section 11(a)(iii)
Adjusted Purchase Price....................................   Section 11(a)(iii)
Affiliate..................................................   Section 1(c)
Agreement..................................................   Preface
Appointment of Rights Agent................................   Section 2
Associate..................................................   Section 1(c)
Beneficial Owner...........................................   Section 1(d)
Beneficially Own...........................................   Section 1(d)
Business Day...............................................   Section 1(e)
Capital Stock Equivalent...................................   Section 11(a)(iii)
Close of Business..........................................   Section 1(f)
Common Shares..............................................   Section 1(g)
Corporation................................................   Preface
Current Per Market Price...................................   Section 11(d)
Current Per Share Market Price.............................   Section 11(d)(i)
Distribution Date..........................................   Section 3(a)
Equivalent Preferred Shares................................   Section 11(b)
Exchange Act...............................................   Section 1(c)
Exchange Ratio.............................................   Section 24(a)
Final Expiration Date......................................   Section 7(a)
Interested Stockholder.....................................   Section 1(j)
Permitted Offer............................................   Section 1(k)
Person.....................................................   Section 1(l)
Preferred Shares...........................................   Section 1(m)
Principal Party............................................   Section 13(b)
Proration Factor...........................................   Section 11(a)(iii)
Purchase Price.............................................   Section 4(a)
Record Date................................................   Preface
Redemption Date............................................   Section 7(a)
Redemption Price...........................................   Section 23
Right......................................................   Preface
Right Certificate..........................................   Section 3(a)
Rights Agent...............................................   Preface
Rights Agreement...........................................   Section 3
Section 11(a)(ii) Event....................................   Section 1(o)
</TABLE>
                                                              
                                                              
                                                              
                                       iii                    
<PAGE>   5
<TABLE>
<S>                                                           <C>            
Section 13 Event...........................................   Section 1(p)
Security...................................................   Section 11(d)(i)
Shares Acquisition Date....................................   Section 1(q)
Subsidiary.................................................   Section 1(r)
Summary of Rights..........................................   Section 3(b)
Then Outstanding...........................................   Section 1(d)(iii)
Trading Day................................................   Section 11(d)(i)
Transaction................................................   Section 1(s)
Transaction Person.........................................   Section 1(t)
Triggering Event...........................................   Section 1(u)
Voting Securities..........................................   Section 13(a)
</TABLE>

                                                                   

                                       iv
<PAGE>   6
                                RIGHTS AGREEMENT

         RIGHTS AGREEMENT, dated as of July 2, 1996 (the "AGREEMENT"), between
Tylan General, Inc., a Delaware corporation (the "CORPORATION"), and The First
National Bank of Boston (the "RIGHTS AGENT").

         The Board of Directors of the Corporation has authorized and declared a
dividend of one preferred share purchase right (a "RIGHT") for each Common Share
(as hereinafter defined) of the Corporation outstanding at the close of business
on July 15, 1996 (the "RECORD DATE"), each Right representing the right to
purchase one one-hundredth of a Preferred Share (as hereinafter defined), upon
the terms and subject to the conditions herein set forth, and has further
authorized and directed the issuance of one Right with respect to each Common
Share that shall become outstanding between the Record Date and the earliest of
the Distribution Date, the Redemption Date or the Final Expiration Date (as such
terms are hereinafter defined); provided, however, that Rights may be issued
with respect to Common Shares that shall become outstanding after the
Distribution Date and prior to the earlier of the Redemption Date and the Final
Expiration Date in accordance with the provisions of Section 22 of this
Agreement.

         Accordingly, in consideration of the premises and the mutual agreements
herein set forth, the parties hereby agree as follows:

         SECTION  1.  CERTAIN  DEFINITIONS.  For purposes of this  Agreement,  
the following  terms have the meanings indicated:

                  (a) "ACQUIRING PERSON" shall mean any Person who or which,
together with all Affiliates and Associates of such Person, shall be the
Beneficial Owner of 15% or more of the then outstanding Common Shares (other
than as a result of a Permitted Offer (as hereinafter defined)) or was such a
Beneficial Owner at any time after the date hereof, whether or not such person
continues to be the Beneficial Owner of 15% or more of the then outstanding
Common Shares. Notwithstanding the foregoing, (A) the term "ACQUIRING PERSON"
shall not include (i) the Corporation, (ii) any Subsidiary of the Corporation,
(iii) any employee benefit plan of the Corporation or of any Subsidiary of the
Corporation, (iv) any Person or entity organized, appointed or established by
the Corporation for or pursuant to the terms of any such plan, or (v) any
Person, who or which together with all Affiliates and Associates of such Person
becomes the Beneficial Owner of 15% or more of the then outstanding Common
Shares as a result of the acquisition of Common Shares directly from the
Corporation, and (B) no Person shall be deemed to be an "ACQUIRING PERSON"
either (X) as a result of the acquisition of Common Shares by the Corporation
which, by reducing the number of Common Shares outstanding, increases the
proportional number of shares beneficially owned by such 

                                       1
<PAGE>   7
Person together with all Affiliates and Associates of such Person; except that
if (i) a Person would become an Acquiring Person (but for the operation of this
subclause X) as a result of the acquisition of Common Shares by the Corporation,
and (ii) after such share acquisition by the Corporation, such Person, or an
Affiliate or Associate of such Person, becomes the Beneficial Owner of any
additional Common Shares, then such Person shall be deemed an Acquiring Person,
or (Y) if (i) within 5 business days after such Person would otherwise have
become an Acquiring Person (but for the operation of this subclause Y), such
Person notifies the Board of Directors that such Person did so inadvertently and
(ii) within 2 business days after such notification, such Person is the
Beneficial Owner of less than 15% of the outstanding Common Shares.

                  (b) "ACT"  shall mean the  Securities  Act of 1933,  as 
amended and as in effect on the date of this Agreement.

                  (c) "AFFILIATE" and "ASSOCIATE" shall have the respective
meanings ascribed to such terms in Rule 12b-2 of the General Rules and
Regulations under the Securities Exchange Act of 1934, as amended and in effect
on the date of this Agreement (the "EXCHANGE ACT") provided that the limited
partners of a limited partnership shall not be deemed to be Associates of such
limited partnership solely by virtue of their limited partnership interest.

                  (d) A  Person  shall  be  deemed  the   "BENEFICIAL   OWNER"  
of  and  shall  be  deemed  to "BENEFICIALLY OWN" any securities:

                           (i)      which  such  Person  or  any  of  such   
Person's   Affiliates   or  Associates beneficially owns, directly or 
indirectly;

                           (ii)     which such Person or any of such Person's  
Affiliates or Associates has (A) the right to acquire (whether such right is
exercisable immediately or only after the passage of time) pursuant to any
agreement, arrangement or understanding, or upon the exercise of conversion
rights, exchange rights, rights (other than the Rights), warrants or options, or
otherwise; provided, however, that a Person shall not be deemed the Beneficial
Owner of, or to beneficially own, securities tendered pursuant to a tender or
exchange offer made by or on behalf of such Person or any of such Person's
Affiliates or Associates until such tendered securities are accepted for
purchase or exchange; or (B) the right to vote pursuant to any agreement,
arrangement or understanding; provided, however, that a Person shall not be
deemed the Beneficial Owner of, or to beneficially own, any security if the
agreement, arrangement or understanding to vote such security (1) arises solely
from a revocable proxy or consent given to such Person in response to a public
proxy or consent solicitation made pursuant to, and in accordance with, the
applicable rules and regulations promulgated under the Exchange Act and (2) is
not also 

                                       2
<PAGE>   8
then reportable on Schedule 13D under the Exchange Act (or any comparable or
successor report); or

                           (iii)    which are beneficially owned,  directly or 
indirectly, by any other Person (or any Affiliate or Associate thereof) with
which such Person (or any of such Person's Affiliates or Associates) has any
agreement, arrangement or understanding (other than customary agreements with
and between underwriters and selling group members with respect to a bona fide
public offering of securities) relating to the acquisition, holding, voting
(except to the extent contemplated by the proviso to Section l(d)(ii)(B)) or
disposing of any securities of the Corporation, provided, however, an agreement,
arrangement or understanding shall not be deemed to include any actions,
including any agreement, arrangement or understanding, or statements by
directors of the Corporation (who are directors as of the date of this
agreement), any subsequent directors of the Corporation (the "Successor
Directors") who have been nominated by a majority of directors who are directors
as of the date of this agreement or who are Successor Directors, or by any
Person of whom such a director is an Affiliate or an Associate, provided,
however, that this exception shall not apply to a particular Person or Persons
if and to the extent that such Person or Persons, after the date of this
agreement, by purchase acquires Beneficial Ownership of more than an additional
5% of the then outstanding Common Shares of the Corporation unless (A) the
shares are acquired from the Corporation as part of an employee benefit or
compensation plan of the Corporation or of any subsidiary of the Corporation,
(B) the Person establishes to the satisfaction of the directors of the
Corporation that it is acting on its own behalf and not in concert with any
other Person and will not, upon completion of any purchases, be the Beneficial
Owner of 15% or more of the outstanding Common Shares, or (C) the person
acquires the Shares in connection with the Corporation's acquisition of Span
Instruments, Inc.

         Notwithstanding anything in this definition of Beneficial Ownership to
the contrary, the phrase "THEN OUTSTANDING," when used with reference to a
Person's Beneficial Ownership of securities of the Corporation, shall mean the
number of such securities then issued and outstanding together with the number
of such securities not then actually issued and outstanding which such Person
would be deemed to own beneficially hereunder.

                  (e) "BUSINESS  DAY"  shall  mean any day  other  than a  
Saturday,  Sunday  or U.S.  federal holiday.

                  (f) "CLOSE OF BUSINESS" on any given date shall mean 5:00
P.M., San Diego time, on such date; provided, however, that if such date is not
a Business Day it shall mean 5:00 P.M., San Diego time, on the next succeeding
Business Day.

                                       3
<PAGE>   9
                  (g) "COMMON SHARES" when used with reference to the
Corporation shall mean the shares of Common Stock, par value $0.001 per share,
of the Corporation or, in the event of a subdivision, combination or
consolidation with respect to such shares of Common Stock, the shares of Common
Stock resulting from such subdivision, combination or consolidation. "COMMON
SHARES" when used with reference to any Person other than the Corporation shall
mean the capital stock (or equity interest) with the greatest voting power of
such other Person or, if such other Person is a Subsidiary of another Person,
the Person or Persons which ultimately control such first-mentioned Person.

                  (h) "DISTRIBUTION DATE" shall have the meaning set forth in 
Section 3 hereof.

                  (i) "FINAL EXPIRATION DATE" shall have the meaning set forth 
in Section 7 hereof.

                  (j) "INTERESTED STOCKHOLDER" shall mean any Acquiring Person
or any Affiliate or Associate of an Acquiring Person or any other Person in
which any such Acquiring Person, Affiliate or Associate has an interest, or any
other Person acting directly or indirectly on behalf of or in concert with any
such Acquiring Person, Affiliate or Associate.

                  (k) "PERMITTED OFFER" shall mean a tender or exchange offer
which is for all outstanding Common Shares at a price and on terms determined,
prior to the purchase of shares under such tender or exchange offer, by at least
a majority of the members of the Board of Directors who are not officers of the
Corporation and who are not Acquiring Persons or Affiliates, Associates,
nominees or representatives of an Acquiring Person or a Transaction Person, to
be adequate (taking into account all factors that such Directors deem relevant
including, without limitation, prices that could reasonably be achieved if the
Corporation or its assets were sold on an orderly basis designed to realize
maximum value) and otherwise in the best interests of the Corporation and its
stockholders (other than the Person or any Affiliate or Associate thereof on
whose basis the offer is being made) taking into account all factors that such
directors may deem relevant.

                  (l) "PERSON" shall mean any individual, firm, partnership,
corporation, trust, association, joint venture or other entity, and shall
include any successor (by merger or otherwise) of such entity.

                                       4
<PAGE>   10
                  (m) "PREFERRED SHARES" shall mean shares of Series A Junior
Participating Preferred Stock, with a par value of $0.001 per share of the
Corporation having the relative rights, preferences and limitations set forth in
the Form of Certificate of Designation attached to this Agreement as Exhibit A.

                  (n) "REDEMPTION DATE" shall have the meaning set forth in 
Section 7 hereof.

                  (o) "SECTION 11(a)(ii) EVENT" shall mean any event described 
in Section 11(a)(ii) hereof.

                  (p) "SECTION 13 EVENT"  shall mean any event  described in 
clause (x), (y) or (z) of Section 13(a) hereof.

                  (q) "SHARES ACQUISITION DATE" shall mean the first date of
public announcement (which, for purposes of this definition, shall include,
without limitation, a report filed pursuant to the Exchange Act) by the
Corporation or an Acquiring Person that an Acquiring Person has become such;
provided, that, if such Person is determined not to have become an Acquiring
Person pursuant to Section 1(a)(Y) hereof, then no Shares Acquisition Date shall
be deemed to have occurred.

                  (r) "SUBSIDIARY" of any Person shall mean any corporation or
other Person of which a majority of the voting power of the voting equity
securities or equity interest is owned, directly or indirectly, by such Person.

                  (s) "TRANSACTION" shall mean any merger, consolidation or sale
of assets described in Section 13(a) hereof or any acquisition of shares of
Common Stock of the Company which would result in a Person becoming a
Transaction Person.

                  (t) "TRANSACTION PERSON" with respect to a Transaction shall
mean (x) any Person who (i) is or will become an Acquiring Person or a Principal
Party (as such term is defined in Section 13(b) hereof) if the Transaction were
to be consummated and (ii) directly or indirectly proposed or nominated a
director of the Company which director is in office at the time of consideration
of the Transaction, or (y) an Affiliate or Associate of such a Person.

                  (u) "TRIGGERING EVENT" shall mean any Section 11(a)(ii) Event
or any Section 13 Event.

         SECTION 2.   APPOINTMENT OF RIGHTS AGENT. The Corporation hereby 
appoints the Rights Agent to act as agent for the Corporation and the
holders of the Rights (who, in accordance with Section 3 hereof, shall prior to
the Distribution Date also be the holders of Common Shares) in accordance with
the terms and conditions hereof, and the Rights 

                                       5
<PAGE>   11
Agent hereby accepts such appointment. The Corporation may from time to time
appoint such co-Rights Agents as it may deem necessary or desirable.

         SECTION 3.   ISSUANCE OF RIGHT CERTIFICATES. (a) Until the earlier of 
(i) the Shares Acquisition Date, (ii) the close of business on the
tenth day (or such later date as may be determined by action of the
Corporation's Board of Directors) after the date of the commencement by any
Person (other than the Corporation, any Subsidiary of the Corporation, any
employee benefit plan of the Corporation or of any Subsidiary of the Corporation
or any Person or entity organized, appointed or established by the Corporation
for or pursuant to the terms of any such plan) of, or of the first public
announcement of the intention of any Person (other than the Corporation, any
Subsidiary of the Corporation, any employee benefit plan of the Corporation or
of any Subsidiary of the Corporation or any Person or entity organized,
appointed or established by the Corporation for or pursuant to the terms of any
such plan) to commence (which intention to commence remains in effect for five
Business Days after such announcement), a tender or exchange offer the
consummation of which would result in any Person becoming an Acquiring Person or
(iii) twenty days prior to the date on which a Transaction is reasonably
expected to become effective or be consummated (including, in the case of (i),
(ii) and (iii), any such date which is after the date of this Agreement and
prior to the issuance of the Rights), the earliest of such dates being herein
referred to as the "DISTRIBUTION DATE," (x) the Rights will be evidenced
(subject to the provisions of Section 3(b) hereof) by the certificates for
Common Shares registered in the names of the holders thereof (which certificates
shall also be deemed to be Right Certificates) and not by separate Right
Certificates, and (y) the right to receive Right Certificates will be
transferable only in connection with the transfer of the underlying Common
Shares (including a transfer to the Corporation); provided, however, that if a
tender offer is terminated prior to the occurrence of a Distribution Date, then
no Distribution Date shall occur as a result of such tender offer. As soon as
practicable after the Distribution Date, the Corporation will prepare and
execute, the Rights Agent will countersign, and the Corporation will send or
cause to be sent by first-class, postage-prepaid mail, to each record holder of
Common Shares as of the close of business on the Distribution Date, at the
address of such holder shown on the records of the Corporation, a Right
Certificate, substantially in the form of Exhibit B hereto (a "RIGHT
CERTIFICATE"), evidencing one Right for each Common Share so held. As of and
after the Distribution Date, the Rights will be evidenced solely by such Right
Certificates.

                  (b) As promptly as practicable following the Record Date, the
Corporation will send a copy of a Summary of Rights to Purchase Preferred
Shares, in substantially the form of Exhibit C hereto (the "SUMMARY OF RIGHTS"),
by first-class, postage-prepaid mail, to each record holder of Common Shares as
of the close of business on the Record Date, at the address of such holder shown
on the records of the Corporation. With respect to certificates for Common
Shares outstanding as of the 

                                       6
<PAGE>   12
Record Date, until the Distribution Date, the Rights will be evidenced by such
certificates registered in the names of the holders thereof together with a copy
of the Summary of Rights attached thereto. Until the Distribution Date (or the
earlier of the Redemption Date or the Final Expiration Date), the surrender for
transfer of any certificate for Common Shares outstanding on the Record Date,
with or without a copy of the Summary of Rights attached thereto, shall also
constitute the transfer of the Rights associated with such Common Shares.

                  (c) Certificates for Common Shares which become outstanding
(including, without limitation, reacquired Common Shares referred to in the last
sentence of this paragraph (c)) after the Record Date but prior to the earliest
of the Distribution Date, the Redemption Date or the Final Expiration Date,
shall be deemed also to be certificates for Rights, and shall bear the following
legend:

                This certificate also evidences and entitles the holder hereof
                to certain rights as set forth in a Rights Agreement between
                Tylan General, Inc. and The First National Bank of Boston, dated
                as of July 2, 1996 (the "RIGHTS AGREEMENT"), the terms of which
                are hereby incorporated herein by reference and a copy of which
                is on file at the principal executive offices of Tylan General,
                Inc. Under certain circumstances, as set forth in the Rights
                Agreement, such Rights will be evidenced by separate
                certificates and will no longer be evidenced by this
                certificate. Tylan General, Inc. will mail to the holder of this
                certificate a copy of the Rights Agreement without charge after
                receipt of a written request therefor. Under certain
                circumstances set forth in the Rights Agreement, Rights issued
                to, or held by, any Person who is, was or becomes an Acquiring
                Person or an Affiliate or Associate thereof (as defined in the
                Rights Agreement) and certain related persons, whether currently
                held by or on behalf of such Person or by any subsequent holder,
                may become null and void.

With respect to such certificates containing the foregoing legend, until the
Distribution Date, the Rights associated with the Common Shares represented by
such certificates shall be evidenced by such certificates alone, and the
surrender for transfer of any such certificate shall also constitute the
transfer of the Rights associated with the Common Shares represented thereby. In
the event that the Corporation purchases or acquires any Common Shares after the
Record Date but prior to the Distribution Date, any Rights associated with such
Common Shares shall be deemed cancelled and retired so that the Corporation
shall not be entitled to exercise any Rights associated with the Common Shares
which are no longer outstanding.

         SECTION 4.   FORM OF RIGHT CERTIFICATE. (a) The Right Certificates
(and the forms of election to purchase and of assignment to be printed on the
reverse thereof) shall 

                                       7
<PAGE>   13
be substantially in the form set forth in Exhibit B hereto and may have such
marks of identification or designation and such legends, summaries or
endorsements printed thereon as the Corporation may deem appropriate and as are
not inconsistent with the provisions of this Agreement, or as may be required to
comply with any applicable law or with any rule or regulation made pursuant
thereto or with any rule or regulation of any stock exchange on which the Rights
may from time to time be listed, or to conform to usage. Subject to the
provisions of Section 11 and Section 22 hereof, the Right Certificates shall
entitle the holders thereof to purchase such number of one-hundredths of a
Preferred Share as shall be set forth therein at the price per one one-hundredth
of a Preferred Share set forth therein (the "PURCHASE PRICE"), but the amount
and type of securities purchasable upon the exercise of each Right and the
Purchase Price thereof shall be subject to adjustment as provided herein.

                  (b) Any Right Certificate issued pursuant to Section 3(a) or
Section 22 hereof that represents Rights which are null and void pursuant to
Section 7(e) of this Agreement and any Right Certificate issued pursuant to
Section 6 or Section 11 hereof upon transfer, exchange, replacement or
adjustment of any other Right Certificate referred to in this sentence, shall
contain (to the extent feasible) the following legend:

                The Rights represented by this Right Certificate are or were
                beneficially owned by a Person who was or became an Acquiring
                Person or an Affiliate or Associate of an Acquiring Person (as
                such terms are defined in the Rights Agreement). Accordingly,
                this Right Certificate and the Rights represented hereby are
                null and void.

Provisions of Section 7(e) of this Rights Agreement shall be operative whether
or not the foregoing legend is contained on any such Right Certificate.

         SECTION 5.   COUNTERSIGNATURE AND REGISTRATION. The Right
Certificates shall be executed on behalf of the Corporation by its Chairman of
the Board, its Chief Executive Officer, its President, any of its Vice
Presidents, or its Treasurer, either manually or by facsimile signature, shall
have affixed thereto the Corporation's seal or a facsimile thereof, and shall be
attested by the Secretary or an Assistant Secretary of the Corporation, either
manually or by facsimile signature. The Right Certificates shall be
countersigned by the Rights Agent and shall not be valid for any purpose unless
so countersigned. In case any officer of the Corporation who shall have signed
any of the Right Certificates shall cease to be such officer of the Corporation
before countersignature by the Rights Agent and issuance and delivery by the
Corporation, such Right Certificates may nevertheless be countersigned by the
Rights Agent and issued and delivered by the Corporation with the same force and
effect as though the person who signed such Right Certificates had not ceased to
be such officer of the Corporation; and any Right Certificate may be signed on
behalf of the Corporation by any person who, at 

                                       8
<PAGE>   14
the actual date of the execution of such Right Certificate, shall be a proper
officer of the Corporation to sign such Right Certificate, although at the date
of the execution of this Rights Agreement any such person was not such an
officer.

         Following the Distribution Date, the Rights Agent will keep or cause to
be kept, at its principal office or offices designated as the appropriate place
for surrender of such Right Certificate or transfer, books for registration and
transfer of the Right Certificates issued hereunder. Such books shall show the
names and addresses of the respective holders of the Right Certificates, the
number of Rights evidenced on its face by each of the Right Certificates and the
certificate number and the date of each of the Right Certificates.

         SECTION 6. TRANSFER, SPLIT-UP, COMBINATION AND EXCHANGE OF RIGHT
CERTIFICATES; MUTILATED, DESTROYED LOST OR STOLEN RIGHT CERTIFICATE.  Subject 
to the provisions of Section 4(b), Section 7(e) and Section 14 hereof, at any
time after the close of business on the Distribution Date, and at or prior to
the close of business on the earlier of the Redemption Date or the Final
Expiration Date, any Right Certificate or Right Certificates may be
transferred, split up, combined or exchanged for another Right Certificate or
Right Certificates, entitling the registered holder to purchase a like number
of one one-hundredth of a Preferred Share (or, following a Triggering Event,
other securities, as the case may be) as the Right Certificate or Right
Certificates surrendered then entitled such holder (or former holder in the
case of a transfer) to purchase. Any registered holder desiring to transfer,
split up, combine or exchange any Right Certificate or Right Certificates shall
make such request in writing delivered to the Rights Agent, and shall surrender
the Right Certificate or Right Certificates to be transferred, split up,
combined or exchanged at the principal office or offices of the Rights Agent
designated for such purpose. Neither the Rights Agent nor the Corporation shall
be obligated to take any action whatsoever with respect to the transfer of any
such surrendered Right Certificate until the registered holder shall have
completed and signed the certificate contained in the form of assignment on the
reverse side of such Right Certificate and shall have provided such additional
evidence of the identity of the Beneficial Owner (or former Beneficial Owner)
or Affiliates or Associates thereof as the Corporation shall reasonably
request. Thereupon the Rights Agent shall, subject to Section 4(b), Section
7(e) and Section 14 hereof, countersign and deliver to the Person entitled
thereto a Right Certificate or Right Certificates, as the case may be, as so
requested. The Corporation may require payment of a sum sufficient to cover any
tax or governmental charge that may be imposed in connection with any transfer,
split up, combination or exchange of Right Certificates.
        
         Upon receipt by the Corporation and the Rights Agent of evidence
reasonably satisfactory to them of the loss, theft, destruction or mutilation of
a Right Certificate, and, in case of loss, theft or destruction, of indemnity or
security reasonably satisfactory to 

                                       9
<PAGE>   15
them, and, at the Corporation's request, reimbursement to the Corporation and
the Rights Agent of all reasonable expenses incidental thereto, and upon
surrender to the Rights Agent and cancellation of the Right Certificate if
mutilated, the Corporation will make and deliver a new Right Certificate of like
tenor to the Rights Agent for countersignature and delivery to the registered
holder in lieu of the Right Certificate so lost, stolen, destroyed or mutilated.

         SECTION 7.   EXERCISE OF RIGHTS; PURCHASE PRICE; EXPIRATION DATE OF 
RIGHTS. (a) Subject to Section 7(e) hereof, the registered holder of any Right
Certificate may exercise the Rights evidenced thereby (except as otherwise
provided herein) in whole or in part at any time after the Distribution Date
upon surrender of the Right Certificate, with the form of election to purchase
and the certificate on the reverse side thereof duly executed, to the Rights
Agent at the principal office or offices of the Rights Agent designated for such
purpose, together with payment of the aggregate Purchase Price for the total
number of one one-hundredth of a Preferred Share (or other securities, as the
case may be) as to which such surrendered Rights are exercised, at or prior to
the earliest of (i) the close of business on July 2, 2006 (the "FINAL EXPIRATION
DATE"), or (ii) the time at which the Rights are redeemed as provided in Section
23 hereof (the "REDEMPTION DATE") or (iii) the time at which the Rights are
exchanged pursuant to Section 24 hereof.

                  (b) The Purchase Price for each one one-hundredth of a
Preferred Share pursuant to the exercise of a Right shall initially be $70.00,
shall be subject to adjustment from time to time as provided in the next
sentence and in Sections 11 and 13(a) hereof and shall be payable in accordance
with paragraph (c) below. Anything in this Agreement to the contrary
notwithstanding, in the event that at any time after the date of this Agreement
and prior to the Distribution Date, the Corporation shall (i) declare or pay any
dividend on the Common Shares payable in Common Shares or (ii) effect a
subdivision, combination or consolidation of the Common Shares (by
reclassification or otherwise than by payment of dividends in Common Shares)
into a greater or lesser number of Common Shares, then in any such case, each
Common Share outstanding following such subdivision, combination or
consolidation shall continue to have a Right associated therewith and the
Purchase Price following any such event shall be proportionately adjusted to
equal the result obtained by multiplying the Purchase Price immediately prior to
such event by a fraction the numerator of which shall be the total number of
Common Shares outstanding immediately prior to the occurrence of the event and
the denominator of which shall be the total number of Common Shares outstanding
immediately following the occurrence of such event. The adjustment provided for
in the preceding sentence shall be made successively whenever such a dividend is
declared or paid or such a subdivision, combination or consolidation is
effected.

                  (c) Upon receipt of a Right Certificate representing
exercisable Rights, with the form of election to purchase and the certificate
duly executed, accompanied by 

                                       10
 
<PAGE>   16
payment of the Purchase Price for the Preferred Shares (or other securities, as
the case may be) to be purchased and an amount equal to any applicable transfer
tax required to be paid by the holder of such Right Certificate in accordance
with Section 6 hereof by certified check, cashier's check or money order payable
to the order of the Corporation, the Rights Agent shall thereupon promptly (i)
(A) requisition from any transfer agent of the Preferred Shares certificates for
the number of Preferred Shares to be purchased and the Corporation hereby
irrevocably authorizes its transfer agent to comply with all such requests, or
(B) if the Corporation, in its sole discretion, shall have elected to deposit
the Preferred Shares issuable upon exercise of the Rights hereunder into a
depositary, requisition from the depositary agent depositary receipts
representing such number of one one-hundredth of a Preferred Share as are to be
purchased (in which case certificates for the Preferred Shares represented by
such receipts shall be deposited by the transfer agent with the depositary
agent) and the Corporation will direct the depositary agent to comply with such
requests, (ii) when appropriate, requisition from the Corporation the amount of
cash to be paid in lieu of issuance of fractional shares in accordance with
Section 14 hereof, (iii) after receipt of such certificates or depositary
receipts, cause the same to be delivered to or upon the order of the registered
holder of such Right Certificate, registered in such name or names as may be
designated by such holder, and (iv) when appropriate, after receipt thereof,
deliver such cash to or upon the order of the registered holder of such Right
Certificate. In the event that the Corporation is obligated to issue other
securities (including Common Shares) of the Corporation pursuant to Section
11(a) hereof, the Corporation will make all arrangements necessary so that such
other securities are available for distribution by the Rights Agent, if and when
appropriate.

         In addition, in the case of an exercise of the Rights by a holder
pursuant to Section 11(a)(ii), the Rights Agent shall return such Right
Certificate to the registered holder thereof after imprinting, stamping or
otherwise indicating thereon that the rights represented by such Right
Certificate no longer include the rights provided by Section 11(a)(ii) of the
Rights Agreement and if less than all the Rights represented by such Right
Certificate were so exercised, the Rights Agent shall indicate on the Right
Certificate the number of Rights represented thereby which continue to include
the rights provided by Section 11(a)(ii).

                  (d) In case the registered holder of any Right Certificate
shall exercise less than all the Rights evidenced thereby, a new Right
Certificate evidencing Rights equivalent to the Rights remaining unexercised
shall be issued by the Rights Agent to the registered holder of such Right
Certificate or to his duly authorized assigns, subject to the provisions of
Section 14 hereof, or the Rights Agent shall place an appropriate notation on
the Right Certificate with respect to those Rights exercised.

                  (e) Notwithstanding anything in this Agreement to the
contrary, from and after the first occurrence of a Section 11(a)(ii) Event, any
Rights beneficially owned 

                                       11
<PAGE>   17
by (i) an Acquiring Person or an Affiliate or Associate of an Acquiring Person,
(ii) a transferee of an Acquiring Person (or of any Affiliate or Associate
thereof) who becomes a transferee after the Acquiring Person becomes such, or
(iii) a transferee of an Acquiring Person (or of any Affiliate or Associate
thereof) who becomes a transferee prior to or concurrently with the Acquiring
Person becoming such and receives such Rights pursuant to either (A) a transfer
(whether or not for consideration) from the Acquiring Person to holders of
equity interests in such Acquiring Person or to any Person with whom the
Acquiring Person has a continuing agreement, arrangement or understanding
regarding the transferred Rights or (B) a transfer which the Board of Directors
of the Corporation has determined is part of a plan, arrangement or
understanding which has as a primary purpose or effect the avoidance of this
Section 7(e), shall become null and void without any further action and no
holder of such Rights shall have any rights whatsoever with respect to such
Rights, whether under any provision of this Agreement or otherwise. The
Corporation shall use all reasonable efforts to insure that the provisions of
this Section 7(e) and Section 4(b) hereof are complied with, but shall have no
liability to any holder of Right Certificates or other Person as a result of its
failure to make any determinations with respect to an Acquiring Person or its
Affiliates, Associates or transferees hereunder.

                  (f) Notwithstanding anything in this Agreement to the
contrary, neither the Rights Agent nor the Corporation shall be obligated to
undertake any action with respect to a registered holder upon the occurrence of
any purported exercise as set forth in this Section 7 unless such registered
holder shall have (i) completed and signed the certificate contained in the form
of election to purchase set forth on the reverse side of the Right Certificate
surrendered for such exercise, and (ii) provided such additional evidence of the
identity of the Beneficial Owner (or former Beneficial owner) or Affiliates or
Associates thereof as the Corporation shall reasonably request.

         SECTION 8.   CANCELLATION AND DESTRUCTION OF RIGHT CERTIFICATES. All 
Right Certificates surrendered for the purpose of exercise, transfer, split up,
combination or exchange shall, if surrendered to the Corporation or to any of
its agents, be delivered to the Rights Agent for cancellation or in cancelled
form, or, if surrendered to the Rights Agent, shall be cancelled by it, and no
Right Certificates shall be issued in lieu thereof except as expressly permitted
by any of the provisions of this Rights Agreement. The Corporation shall deliver
to the Rights Agent for cancellation and retirement, and the Rights Agent shall
so cancel and retire, any other Right Certificate purchased or acquired by the
Corporation otherwise than upon the exercise thereof. The Rights Agent shall
deliver all cancelled Right Certificates to the Corporation, or shall, at the
written request of the Corporation, destroy such cancelled Right Certificates,
and in such case shall deliver a certificate of destruction thereof to the
Corporation.

         SECTION 9.   RESERVATION AND AVAILABILITY OF PREFERRED SHARES. The 
Corporation covenants and agrees that at all times prior to the occurrence of a

                                       12
<PAGE>   18
Section 11(a)(ii) Event it will cause to be reserved and kept available out of
its authorized and unissued Preferred Shares, or any authorized and issued
Preferred Shares held in its treasury, the number of Preferred Shares that will
be sufficient to permit the exercise in full of all outstanding Rights and,
after the occurrence of a Section 11(a)(ii) Event, shall, to the extent
reasonably practicable, so reserve and keep available a sufficient number of
Common Shares (and/or other securities) which may be required to permit the
exercise in full of the Rights pursuant to this Agreement.

         So long as the Preferred Shares (and, after the occurrence of a Section
11(a)(ii) Event, Common Shares or any other securities) issuable upon the
exercise of the Rights may be listed on any national securities exchange, the
Corporation shall use its best efforts to cause, from and after such time as the
Rights become exercisable, all shares reserved for such issuance to be listed on
such exchange upon official notice of issuance upon such exercise.

         The Corporation covenants and agrees that it will take all such action
as may be necessary to ensure that all Preferred Shares (or Common Shares and/or
other securities, as the case may be) delivered upon exercise of Rights shall,
at the time of delivery of the certificates for such shares or other securities
(subject to payment of the Purchase Price), be duly and validly authorized and
issued and fully paid and non-assessable shares or securities.

         The Corporation further covenants and agrees that it will pay when due
and payable any and all U.S. federal and state transfer taxes and charges which
may be payable in respect of the issuance or delivery of the Right Certificates
or of any Preferred Shares (or Common Shares and/or other securities, as the
case may be) upon the exercise of Rights. The Corporation shall not, however, be
required to pay any transfer tax which may be payable in respect of any transfer
or delivery of Right Certificates to a person other than, or the issuance or
delivery of certificates or depositary receipts for the Preferred Shares (or
Common Shares and/or other securities, as the case may be) in a name other than
that of, the registered holder of the Right Certificate evidencing Rights
surrendered for exercise, or to issue or to deliver any certificates or
depositary receipts for Preferred Shares (or Common Shares and/or other
securities, as the case may be) upon the exercise of any Rights, until any such
tax shall have been paid (any such tax being payable by the holder of such Right
Certificate at the time of surrender) or until it has been established to the
Corporation's reasonable satisfaction that no such tax is due.

         The Corporation shall use its best efforts to (i) file, as soon as
practicable following the Shares Acquisition Date, a registration statement
under the Act, with respect to the securities purchasable upon exercise of the
Rights on an appropriate form, (ii) cause such registration statement to become
effective as soon as practicable after such filing, and (iii) cause such
registration statement to remain effective (with a prospectus at 

                                       13
<PAGE>   19
all times meeting the requirements of the Act and the rules and regulations
thereunder) until the date of the expiration of the rights provided by Section
11(a)(ii). The Corporation will also take such action as may be appropriate
under the blue sky laws of the various states.

         SECTION 10.  PREFERRED SHARES RECORD DATE. Each person in
whose name any certificate for Preferred Shares (or Common Shares and/or other
securities, as the case may be) is issued upon the exercise of Rights shall for
all purposes be deemed to have become the holder of record of the Preferred
Shares (or Common Shares and/or other securities, as the case may be)
represented thereby on, and such certificate shall be dated, the date upon which
the Right Certificate evidencing such Rights was duly surrendered and payment of
the Purchase Price (and any applicable transfer taxes) was made; provided,
however, that, if the date of such surrender and payment is a date upon which
the Preferred Shares (or Common Shares and/or other securities, as the case may
be) transfer books of the Corporation are closed, such person shall be deemed to
have become the record holder of such shares on, and such certificate shall be
dated, the next succeeding Business Day on which the Preferred Shares (or Common
Shares and/or other securities, as the case may be) transfer books of the
Corporation are open.

         SECTION 11.  ADJUSTMENT OF PURCHASE PRICE, NUMBER AND KIND OF SHARES
OR NUMBER OF RIGHTS. The Purchase Price, the number and kind of shares
covered by each Right and the number of Rights outstanding are subject to
adjustment from time to time as provided in this Section 11.

                  (a) (i) In the event the Corporation shall at any time after
the date of this Agreement (A) declare a dividend on the Preferred Shares
payable in Preferred Shares, (B) subdivide the outstanding Preferred Shares, (C)
combine the outstanding Preferred Shares into a smaller number of Preferred
Shares or (D) issue any shares of its capital stock in a reclassification of the
Preferred Shares (including any such reclassification in connection with a
consolidation or merger in which the Corporation is the continuing or surviving
corporation), except as otherwise provided in this Section 11(a) and Section
7(e) hereof, the Purchase Price in effect at the time of the record date for
such dividend or of the effective date of such subdivision, combination or
reclassification, and the number and kind of shares of capital stock issuable on
such date, shall be proportionately adjusted so that the holder of any Right
exercised after such time shall be entitled to receive the aggregate number and
kind of shares of capital stock which, if such Right had been exercised
immediately prior to such date and at a time when the Preferred Shares transfer
books of the Corporation were open, such holder would have owned upon such
exercise and been entitled to receive by virtue of such dividend, subdivision,
combination or reclassification; provided, however, that in no event shall the
consideration to be paid upon the exercise of one Right be less than the
aggregate par value of the shares of capital stock of the Corporation issuable
upon 

                                       14
<PAGE>   20
exercise of one Right. If an event occurs which would require an adjustment
under both Section 11(a)(i) and Section 11(a)(ii), the adjustment provided for
in this Section 11(a)(i) shall be in addition to, and shall be made prior to,
any adjustment required pursuant to Section 11(a)(ii).

                           (ii)     In the event any Person,  alone or together 
with its Affiliates and Associates, shall become an Acquiring Person, then
proper provision shall be made so that each holder of a Right (except as
provided below and in Section 7(e) hereof) shall, for a period of 60 days after
the later of the occurrence of any such event or the effective date of an
appropriate registration statement under the Act pursuant to Section 9 hereof,
have a right to receive, upon exercise thereof at a price equal to the then
current Purchase Price, in accordance with the terms of this Agreement, such
number of Common Shares (or, in the discretion of the Board of Directors, one
one-hundredth of a Preferred Share) as shall equal the result obtained by (x)
multiplying the then current Purchase Price by the then number of one
one-hundredths of a Preferred Share for which a Right was exercisable
immediately prior to the first occurrence of a Section 11(a)(ii) Event, and
dividing that product by (y) 50% of the then current per share market price of
the Corporation's Common Shares (determined pursuant to Section 11(d) hereof) on
the date of such first occurrence (such number of shares being referred to as
the "ADJUSTMENT SHARES"); provided, however, that if the transaction that would
otherwise give rise to the foregoing adjustment is also subject to the
provisions of Section 13 hereof, then only the provisions of Section 13 hereof
shall apply and no adjustment shall be made pursuant to this Section 11(a)(ii);

                           (iii)    In the event that there shall not be 
sufficient treasury shares or authorized but unissued (and unreserved) Common
Shares to permit the exercise in full of the Rights in accordance with the
foregoing subparagraph (ii) and the Rights become so exercisable (and the Board
has determined to make the Rights exercisable into fractions of a Preferred
Share), notwithstanding any other provision of this Agreement, to the extent
necessary and permitted by applicable law, each Right shall thereafter represent
the right to receive, upon exercise thereof at the then current Purchase Price
in accordance with the terms of this Agreement, (x) a number of (or fractions
of) Common Shares (up to the maximum number of Common Shares which may
permissibly be issued) and (y) one-one-hundredth of a Preferred Share or a
number of, or fractions of other equity securities of the Corporation (or, in
the discretion of the Board of Directors, debt) which the Board of Directors of
the Corporation has determined to have the same aggregate current market value
(determined pursuant to Section 11(d)(i) and (ii) hereof, to the extent
applicable,) as one Common Share (such number of, or fractions of, Preferred
Shares, debt, or other equity securities or debt of the Corporation) being
referred to as a "CAPITAL STOCK EQUIVALENT"), equal in the aggregate to the
number of Adjustment Shares; provided, however, if sufficient Common Shares
and/or capital stock equivalents are unavailable, then the Corporation shall, to
the extent permitted by applicable law, take all such action 

                                       15
<PAGE>   21
as may be necessary to authorize additional Common Shares or capital stock
equivalents for issuance upon exercise of the Rights, including the calling of a
meeting of stockholders; and provided, further, that if the Corporation is
unable to cause sufficient Common Shares and/or capital stock equivalents to be
available for issuance upon exercise in full of the Rights, then each Right
shall thereafter represent the right to receive the Adjusted Number of Shares
upon exercise at the Adjusted Purchase Price (as such terms are hereinafter
defined). As used herein, the term "ADJUSTED NUMBER OF SHARES" shall be equal to
that number of (or fractions of) Common Shares (and/or capital stock
equivalents) equal to the product of (x) the number of Adjustment Shares and (y)
a fraction, the numerator of which is the number of Common Shares (and/or
capital stock equivalents) available for issuance upon exercise of the Rights
and the denominator of which is the aggregate number of Adjustment Shares
otherwise issuable upon exercise in full of all Rights (assuming there were a
sufficient number of Common Shares available) (such fraction being referred to
as the "PRORATION FACTOR"). The "ADJUSTED PURCHASE PRICE" shall mean the product
of the Purchase Price and the Proration Factor. The Board of Directors may, but
shall not be required to, establish procedures to allocate the right to receive
Common Shares and capital stock equivalents upon exercise of the Rights among
holders of Rights.

                  (b) In case the Corporation shall fix a record date for the
issuance of rights (other than the Rights), options or warrants to all holders
of Preferred Shares entitling them (for a period expiring within 45 calendar
days after such record date) to subscribe for or purchase Preferred Shares (or
shares having the same rights, privileges and preferences as the Preferred
Shares ("EQUIVALENT PREFERRED SHARES")) or securities convertible into Preferred
Shares or equivalent preferred shares at a price per Preferred Share or
equivalent preferred share (or having a conversion price per share, if a
security convertible into Preferred Shares or equivalent preferred shares) less
than the then current per share market price of the Preferred Shares (as
determined pursuant to Section 11(d) hereof) on such record date, the Purchase
Price to be in effect after such record date shall be determined by multiplying
the Purchase Price in effect immediately prior to such record date by a
fraction, the numerator of which shall be the number of Preferred Shares
outstanding on such record date plus the number of Preferred Shares which the
aggregate offering price of the total number of Preferred Shares and/or
equivalent preferred shares so to be offered (and/or the aggregate initial
conversion price of the convertible securities so to be offered) would purchase
at such current per share market price, and the denominator of which shall be
the number of Preferred Shares outstanding on such record date plus the number
of additional Preferred Shares and/or equivalent preferred shares to be offered
for subscription or purchase (or into which the convertible securities so to be
offered are initially convertible); provided, however, that in no event shall
the consideration to be paid upon the exercise of one Right be less than the
aggregate par value of the shares of capital stock of the Corporation issuable
upon exercise of one 

                                       16
<PAGE>   22
Right. In case such subscription price may be paid in a consideration part or
all of which shall be in a form other than cash, the value of such consideration
shall be determined in good faith by the Board of Directors of the Corporation,
whose determination shall be described in a statement filed with the Rights
Agent and shall be binding on the Rights Agent. Preferred Shares owned by or
held for the account of the Corporation shall not be deemed outstanding for the
purpose of any such computation. Such adjustment shall be made successively
whenever such a record date is fixed; and in the event that such rights, options
or warrants are not so issued, the Purchase Price shall be adjusted to be the
Purchase Price which would then be in effect if such record date had not been
fixed.

                  (c) In case the Corporation shall fix a record date for the
making of a distribution to all holders of the Preferred Shares (including any
such distribution made in connection with a consolidation or merger in which the
Corporation is the continuing or surviving corporation) of evidences of
indebtedness or assets (other than a regular quarterly cash dividend or a
dividend payable in Preferred Shares) or subscription rights or warrants
(excluding those referred to in Section 11(b) hereof), the Purchase Price to be
in effect after such record date shall be determined by multiplying the Purchase
Price in effect immediately prior to such record date by a fraction, the
numerator of which shall be the then current per share market price (as
determined pursuant to Section 11(d) hereof) of the Preferred Shares on such
record date, less the fair market value (as determined in good faith by the
Board of Directors of the Corporation, whose determination shall be described in
a statement filed with the Rights Agent and shall be binding on the Rights
Agent) of the portion of the assets or evidences of indebtedness so to be
distributed or of such subscription rights or warrants applicable to one
Preferred Share and the denominator of which shall be such current per share
market price of the Preferred Shares; provided, however, that in no event shall
the consideration to be paid upon the exercise of one Right be less than the
aggregate par value of the shares of capital stock of the Corporation to be
issued upon exercise of one Right. Such adjustments shall be made successively
whenever such a record date is fixed; and in the event that such distribution is
not so made, the Purchase Price shall again be adjusted to be the Purchase Price
which would then be in effect if such record date had not been fixed.

                  (d) (i) For the purpose of any computation hereunder, the
"CURRENT PER SHARE MARKET PRICE" of any security (a "SECURITY" for the purpose
of this Section 11(d)(i)) on any date shall be deemed to be the average of the
daily closing prices per share of such Security for the thirty (30) consecutive
Trading Days (as such term is hereinafter defined) immediately prior to such
date; provided, however, that in the event that the current per share market
price of the Security is determined during a period following the announcement
by the issuer of such Security of (A) a dividend or distribution on such
Security payable in shares of such Security or securities convertible into such
shares, or (B) any subdivision, combination or reclassification of such Security
and prior to the expiration of thirty (30) Trading Days after the ex-dividend
date for such 

                                       17
<PAGE>   23
dividend or distribution, or the record date for such subdivision, combination
or reclassification, then, and in each such case, the current per share market
price shall be appropriately adjusted to reflect the current market price per
share equivalent of such Security. The closing price for each day shall be the
last sale price, regular way, or, in case no such sale takes place on such day,
the average of the closing bid and asked prices, regular way, in either case as
reported in the principal consolidated transaction reporting system with respect
to securities listed or admitted to trading on the New York Stock Exchange or,
if the Security is not listed or admitted to trading on the New York Stock
Exchange, as reported in the principal consolidated transaction reporting system
with respect to securities listed on the principal national securities exchange
on which the Security is listed or admitted to trading or, if the Security is
not listed or admitted to trading on any national securities exchange, the last
quoted price or, if not so quoted, the average of the high bid and low asked
prices in the over-the-counter market, as reported by the National Association
of Securities Dealers, Inc. Automated Quotations System ("NASDAQ") or such other
system then in use, or, if on any such date the Security is not quoted by any
such organization, the average of the closing bid and asked prices as furnished
by a professional market maker making a market in the Security selected by the
Board of Directors of the Corporation. If on any such date no such market maker
is making a market in the Security, the fair value of the Security on such date
as determined in good faith by the Board of Directors of the Corporation shall
be used. The term "TRADING DAY" shall mean a day on which the principal national
securities exchange on which the Security is listed or admitted to trading is
open for the transaction of business or, if the Security is not listed or
admitted to trading on any national securities exchange, a Business Day.

                           (ii)     For the purpose of any  computation  
hereunder, the "CURRENT PER SHARE MARKET PRICE" of the Preferred Shares shall be
determined in accordance with the method set forth in Section 11(d)(i). If the
Preferred Shares are not publicly traded, the "CURRENT PER SHARE MARKET PRICE"
of the Preferred Shares shall be conclusively deemed to be the current per share
market price of the Common Shares as determined pursuant to Section 11(d)(i)
(appropriately adjusted to reflect any stock split, stock dividend or similar
transaction occurring after the date hereof), multiplied by one hundred. If
neither the Common Shares nor the Preferred Shares are publicly held or so
listed or traded, "CURRENT PER SHARE MARKET PRICE" shall mean the fair value per
share as determined in good faith by the Board of Directors of the Corporation,
whose determination shall be described in a statement filed with the Rights
Agent and shall be binding on the Rights Agent.

                  (e) Anything herein to the contrary notwithstanding, no
adjustment in the Purchase Price shall be required unless such adjustment would
require an increase or decrease of at least 1% in the Purchase Price; provided,
however, that any adjustments which by reason of this Section 11(e) are not
required to be made shall be carried forward 

                                       18
<PAGE>   24
and taken into account in any subsequent adjustment. All calculations under this
Section 11 shall be made to the nearest cent or to the nearest one one-hundredth
of a Preferred Share or one ten-thousandth of any other share or security as the
case may be. Notwithstanding the first sentence of this Section 11(e), any
adjustment required by this Section 11 shall be made no later than the earlier
of (i) three (3) years from the date of the transaction which mandates such
adjustment or (ii) the Final Expiration Date.

                  (f) If as a result of an adjustment made pursuant to Section
11(a)(ii) or Section 13(a) hereof, the holder of any Right thereafter exercised
shall become entitled to receive any shares of capital stock of the Corporation
other than Preferred Shares, thereafter the number of other shares so receivable
upon exercise of any Right shall be subject to adjustment from time to time in a
manner and on terms as nearly equivalent as practicable to the provisions with
respect to the Preferred Shares contained in Section 11(a) through (c),
inclusive, and the provisions of Sections 7, 9, 10, 13 and 14 with respect to
the Preferred Shares shall apply on like terms to any such other shares.

                  (g) All Rights originally issued by the Corporation subsequent
to any adjustment made to the Purchase Price hereunder shall evidence the right
to purchase, at the adjusted Purchase Price, the number of one one-hundredths of
a Preferred Share purchasable from time to time hereunder upon exercise of the
Rights, all subject to further adjustment as provided herein.

                  (h) The Corporation may elect on or after the date of any
adjustment of the Purchase Price to adjust the number of Rights, in lieu of any
adjustment in the number of one one-hundredths of a Preferred Share purchasable
upon the exercise of a Right. Each of the Rights outstanding after such
adjustment of the number of Rights shall be exercisable for the number of one
one-hundredths of a Preferred Share for which a Right was exercisable
immediately prior to such adjustment. Each Right held of record prior to such
adjustment of the number of Rights shall become that number of Rights
(calculated to the nearest one ten-thousandth) obtained by dividing the Purchase
Price in effect immediately prior to adjustment of the Purchase Price by the
Purchase Price in effect immediately after adjustment of the Purchase Price. The
Corporation shall make a public announcement of its election to adjust the
number of Rights, indicating the record date for the adjustment, and, if known
at the time, the amount of the adjustment to be made. This record date may be
the date on which the Purchase Price is adjusted or any day thereafter, but, if
the Right Certificates have been issued, shall be at least ten (10) days later
than the date of the public announcement. If Right Certificates have been
issued, upon each adjustment of the number of Rights pursuant to this Section
11(h), the Corporation shall, as promptly as practicable, cause to be
distributed to holders of record of Right Certificates on such record date Right
Certificates evidencing, subject to Section 14 hereof, the additional Rights to
which such holders shall be entitled as a result of such adjustment, or, at the
option of the Corporation, shall cause to be distributed to such 

                                       19
<PAGE>   25
holders of record in substitution and replacement for the Right Certificates
held by such holders prior to the date of adjustment, and upon surrender
thereof, if required by the Corporation, new Right Certificates evidencing all
the Rights to which such holders shall be entitled after such adjustment. Right
Certificates so to be distributed shall be issued, executed and countersigned in
the manner provided for herein and shall be registered in the names of the
holders of record of Right Certificates on the record date specified in the
public announcement.

                  (i) Irrespective of any adjustment or change in the Purchase
Price or the number of one one-hundredths of a Preferred Share issuable upon the
exercise of the Rights, the Right Certificates theretofore and thereafter issued
may continue to express the Purchase Price and the number of one one-hundredths
of a Preferred Share which were expressed in the initial Right Certificates
issued hereunder.

                  (j) Before taking any action that would cause an adjustment
reducing the Purchase Price below the then par value, if any, of the number of
one one-hundredths of a Preferred Share, Common Shares or other securities
issuable upon exercise of the Rights, the Corporation shall take any corporate
action which may, in the opinion of its counsel, be necessary in order that the
Corporation may validly and legally issue such number of fully paid and
non-assessable one one-hundredths of a Preferred Share, Common Shares or other
securities at such adjusted Purchase Price.

                  (k) In any case in which this Section 11 shall require that an
adjustment in the Purchase Price be made effective as of a record date for a
specified event, the Corporation may elect to defer until the occurrence of such
event the issuance to the holder of any Right exercised after such record date
the Preferred Shares, Common Shares or other securities of the Corporation, if
any, issuable upon such exercise over and above the Preferred Shares, Common
Shares or other securities of the Corporation, if any, issuable upon exercise on
the basis of the Purchase Price in effect prior to such adjustment; provided,
however, that the Corporation shall deliver to such holder a due bill or other
appropriate instrument evidencing such holder's right to receive such additional
shares upon the occurrence of the event requiring such adjustment.

                  (l) Anything in this Section 11 to the contrary
notwithstanding, the Corporation shall be entitled to make such reductions in
the Purchase Price, in addition to those adjustments expressly required by this
Section 11, as and to the extent that it in its sole discretion shall determine
to be advisable in order that (i) any consolidation or subdivision of the
Preferred Shares, (ii) issuance wholly for cash of Preferred Shares at less than
the current market price, (iii) issuance wholly for cash of Preferred Shares or
securities which by their terms are convertible into or exchangeable for
Preferred Shares, (iv) stock dividends or (v) issuance of rights, options or
warrants referred to in this 

                                       20
<PAGE>   26
Section 11, hereafter made by the Corporation to holders of its Preferred Shares
shall not be taxable to such stockholders.

                  (m) The Corporation covenants and agrees that it shall not, at
any time after the Distribution Date, (i) consolidate with any other Person
(other than a Subsidiary of the Corporation in a transaction which does not
violate Section 11(n) hereof), (ii) merge with or into any other Person (other
than a Subsidiary of the Corporation in a transaction which does not violate
Section 11(n) hereof), or (iii) sell or transfer (or permit any Subsidiary to
sell or transfer), in one transaction, or a series of related transactions,
assets or earning power aggregating more than 50% of the assets or earning power
of the Corporation and its Subsidiaries (taken as a whole) to any other Person
or Persons (other than the Corporation and/or any of its Subsidiaries in one or
more transactions each of which does not violate Section 11(n) hereof), if (x)
at the time of or immediately after such consolidation, merger, sale or transfer
there are any charter or by-law provisions or any rights, warrants or other
instruments or securities outstanding or agreements in effect or other actions
taken, which would materially diminish or otherwise eliminate the benefits
intended to be afforded by the Rights or (y) prior to, simultaneously with or
immediately after such consolidation, merger or sale, the stockholders of the
Person who constitutes, or would constitute, the "PRINCIPAL PARTY" for purposes
of Section 13(a) hereof shall have received a distribution of Rights previously
owned by such Person or any of its Affiliates and Associates. The Corporation
shall not consummate any such consolidation, merger, sale or transfer unless
prior thereto the Corporation and such other Person shall have executed and
delivered to the Rights Agent a supplemental agreement evidencing compliance
with this Section 11(m).

                  (n) The Corporation covenants and agrees that, after the
Distribution Date, it will not, except as permitted by Section 23 or Section 27
hereof, take (or permit any Subsidiary to take) any action the purpose of which
is to, or if at the time such action is taken it is reasonably foreseeable that
the effect of such action is to, materially diminish or otherwise eliminate the
benefits intended to be afforded by the Rights.

                  (o) The exercise of Rights under Section 11(a)(ii) shall only
result in the loss of rights under Section 11(a)(ii) to the extent so exercised
and shall not otherwise affect the rights represented by the Rights under this
Rights Agreement, including the rights represented by Section 13.

         SECTION 12.  CERTIFICATE OF ADJUSTED PURCHASE PRICE OR NUMBER OF 
SHARES. Whenever an adjustment is made as provided in Sections 11 or 13
hereof, the Corporation shall promptly (a) prepare a certificate setting forth
such adjustment, and a brief statement of the facts accounting for such
adjustment, (b) file with the Rights Agent and with each transfer agent for the
Common Shares and the Preferred Shares a copy of such certificate and (c) mail  
a brief summary thereof to each holder of a Right Certificate in accordance 

                                       21
<PAGE>   27
with Section 26 hereof. The Rights Agent shall be fully protected in relying on
any such certificate and on any adjustment therein contained and shall not be
deemed to have knowledge of such adjustment unless and until it shall have
received such certificate.

        SECTION 13.  CONSOLIDATION, MERGER OR SALE OR TRANSFER OF ASSETS OR
EARNING POWER. (a) In the event that, on or following the Shares Acquisition
Date or, if a Transaction is proposed, the Distribution Date, directly or
indirectly, (x) the Corporation shall consolidate with, or merge with and into,
any Interested Stockholder or, if in such merger or consolidation all holders
of Common Stock are not treated alike, any other Person, (y) the Corporation
shall consolidate with, or merge with, any Interested Stockholder or, if in
such merger or consolidation all holders of Common Stock are not treated alike,
any other Person, and the Corporation shall be the continuing or surviving
corporation of such consolidation or merger (other than, in a case of any
transaction described in (x) or (y), a merger or consolidation which would
result in all of the securities generally entitled to vote in the election of
directors ("VOTING SECURITIES") of the Corporation outstanding immediately
prior thereto continuing to represent (either by remaining outstanding or by
being converted into securities of the surviving entity) all of the voting
securities of the Corporation or such surviving entity outstanding immediately
after such merger or consolidation and the holders of such securities not
having changed as a result of such merger or consolidation), or (z) the
Corporation shall sell or otherwise transfer (or one or more of its
Subsidiaries shall sell or otherwise transfer), in one transaction or a series
of related transactions, assets or earning power aggregating more than 50% of
the assets or earning power of the Corporation and its Subsidiaries (taken as a
whole) to any Interested Stockholder or Stockholders or, if in such transaction
all holders of Common Stock are not treated alike, any other Person (other than
the Corporation or any Subsidiary of the Corporation in one or more
transactions each of which does not violate Sections 11(m) or 11(n) hereof),
then, and in each such case (except as provided in Section 13(d) hereof),
proper provision shall be made so that (i) each holder of a Right, except as
provided in Section 7(e) hereof, shall thereafter have the right to receive,
upon the exercise thereof at a price equal to the then current Purchase Price,
in accordance with the terms of this Agreement and in lieu of Preferred Shares,
such number of freely tradable Common Shares of the Principal Party (as
hereinafter defined), not subject to any liens, encumbrances, rights of first
refusal or other adverse claims, as shall equal the result obtained by (A)
multiplying the then current Purchase Price by the number of one one-hundredths
of a Preferred Share for which a Right is then exercisable (without taking into
account any adjustment previously made pursuant to Section 11(a)(ii)) and
dividing that product by (B) 50% of the then current per share market price of
the Common Shares of such Principal Party (determined pursuant to Section 11(d)
hereof) on the date of consummation of such Section 13 Event; (ii) such
Principal Party shall thereafter be liable for, and shall assume, by virtue of
such Section 13 Event, all the obligations and duties of the Corporation
pursuant to this

                                       22
<PAGE>   28
Agreement; (iii) the term "CORPORATION" shall thereafter be deemed to refer to
such Principal Party, it being specifically intended that the provisions of
Section 11 hereof shall apply only to such Principal Party following the first
occurrence of a Section 13 Event; and (iv) such Principal Party shall take such
steps (including, but not limited to, the reservation of a sufficient number of
its Common Shares) in connection with the consummation of any such transaction
as may be necessary to assure that the provisions hereof shall thereafter be
applicable, as nearly as reasonably may be, in relation to the Common Shares
thereafter deliverable upon the exercise of the Rights.

         (b)  "PRINCIPAL PARTY" shall mean

              (i)  in the case of any transaction described in clause (x) or (y)
of the first sentence of Section 13(a), the Person that is the issuer of any
securities into which Common Shares of the Corporation are converted in such
merger or consolidation, and if no securities are so issued, the Person that is
the other party to such merger or consolidation (including, if applicable, the
Corporation if it is the surviving corporation); and

              (ii) in the case of any transaction described in clause (z) of the
first sentence of Section 13(a), the Person that is the party receiving the
greatest portion of the assets or earning power transferred pursuant to such
transaction or transactions; provided, however, that in any of the foregoing
cases, (1) if the Common Shares of such Person are not at such time and have not
been continuously over the preceding twelve (12) month period registered under
Section 12 of the Exchange Act, and such Person is a direct or indirect
Subsidiary of another Person the Common Shares of which are and have been so
registered, "PRINCIPAL PARTY" shall refer to such other Person; (2) in case such
Person is a Subsidiary, directly or indirectly, of more than one Person, the
Common Shares of two or more of which are and have been so registered,
"PRINCIPAL PARTY" shall refer to whichever of such Persons is the issuer of the
Common Shares having the greatest aggregate market value; and (3) in case such
Person is owned, directly or indirectly, by a joint venture formed by two or
more Persons that are not owned, directly or indirectly, by the same Person, the
rules set forth in (1) and (2) above shall apply to each of the chains of
ownership having an interest in such joint venture as if such party were a
"SUBSIDIARY" of both or all of such joint venturers and the Principal Parties in
each such chain shall bear the obligations set forth in this Section 13 in the
same ratio as their direct or indirect interests in such Person bear to the
total of such interests.

         (c)  The Corporation shall not consummate any such consolidation,
merger, sale or transfer unless the Principal Party shall have a sufficient
number of its authorized Common Shares which have not been issued or reserved
for issuance to permit the exercise in full of the Rights in accordance with
this Section 13 and unless prior thereto the Corporation and such Principal
Party shall have executed and delivered to the 



                                       23
<PAGE>   29
Rights Agent a supplemental agreement providing for the terms set forth in
paragraphs (a) and (b) of this Section 13 and further providing that, as soon as
practicable after the date of any consolidation, merger, sale or transfer
mentioned in paragraph (a) of this Section 13, the Principal Party at its own
expense shall:

              (i)   prepare and file a registration statement under the Act with
respect to the Rights and the securities purchasable upon exercise of the Rights
on an appropriate form, and will use its best efforts to cause such registration
statement to (A) become effective as soon as practicable after such filing and
(B) remain effective (with a prospectus at all times meeting the requirements of
the Act) until the Final Expiration Date;

              (ii)  use its best efforts to qualify or register the Rights and
the securities purchasable upon exercise of the Rights under the blue sky laws
of such jurisdictions as may be necessary or appropriate; and

              (iii) deliver to holders of the Rights historical financial
statements for the Principal Party which comply in all respects with the
requirements for registration on Form 10 under the Exchange Act.

     The provisions of this Section 13 shall similarly apply to successive
mergers or consolidations or sales or other transfers. The rights under this
Section 13 shall be in addition to the rights to exercise Rights and adjustments
under Section 11(a)(ii) and shall survive any exercise thereof.

         (d)  Notwithstanding anything in this Agreement to the contrary, 
Section 13 shall not be applicable to a transaction described in subparagraphs
(x) and (y) of Section 13(a) if: (i) such transaction is consummated with a
Person or Persons who acquired Common Shares pursuant to a Permitted Offer (or a
wholly owned Subsidiary of any such Person or Persons); (ii) the price per
Common Share offered in such transaction is not less than the price per Common
Share paid to all holders of Common Shares whose shares were purchased pursuant
to such Permitted Offer; and (iii) the form of consideration offered in such
transaction is the same as the form of consideration paid pursuant to such
Permitted Offer. Upon consummation of any such transaction contemplated by this
Section 13(d), all Rights hereunder shall expire.

     SECTION 14.  FRACTIONAL RIGHTS AND FRACTIONAL SHARES. (a) The Corporation 
shall not be required to issue fractions of Rights or to distribute Right
Certificates which evidence fractional Rights. In lieu of such fractional
Rights, there shall be paid to the registered holders of the Right Certificates
with regard to which such fractional Rights would otherwise be issuable, an
amount in cash equal to the same fraction of the current market value of a whole
Right. For the purposes of this Section 14(a), the current market



                                       24
<PAGE>   30
value of a whole Right shall be the closing price of the Rights for the Trading
Day immediately prior to the date on which such fractional Rights would have
been otherwise issuable. The closing price for any day shall be the last sale
price, regular way, or, in case no such sale takes place on such day, the
average of the closing bid and asked prices, regular way, in either case as
reported in the principal consolidated transaction reporting system with respect
to securities listed or admitted to trading on the New York Stock Exchange or,
if the Rights are not listed or admitted to trading on the New York Stock
Exchange, as reported in the principal consolidated transaction reporting system
with respect to securities listed on the principal national securities exchange
on which the Rights are listed or admitted to trading or, if the Rights are not
listed or admitted to trading on any national securities exchange, the last
quoted price or, if not so quoted, the average of the high bid and low asked
prices in the over-the-counter market, as reported by NASDAQ or such other
system then in use or, if on any such date the Rights are not quoted by any such
organization, the average of the closing bid and asked prices as furnished by a
professional market maker making a market in the Rights selected by the Board of
Directors of the Corporation. If on any such date no such market maker is making
a market in the Rights, the fair value of the Rights on such date as determined
in good faith by the Board of Directors of the Corporation shall be used.

         (b)  The Corporation shall not be required to issue fractions of
Preferred Shares (other than fractions which are one one-hundredth or integral
multiples of one one-hundredth of a Preferred Share) upon exercise of the Rights
or to distribute certificates which evidence fractional Preferred Shares (other
than fractions which are one one-hundredth or integral multiples of one
one-hundredth of a Preferred Share). Fractions of Preferred Shares in integral
multiples of one one-hundredth of a Preferred Share may, at the election of the
Corporation, be evidenced by depositary receipts, pursuant to an appropriate
agreement between the Corporation and a depositary selected by it; provided that
such agreement shall provide that the holders of such depositary receipts shall
have the rights, privileges and preferences to which they are entitled as
beneficial owners of the Preferred Shares represented by such depositary
receipts. In lieu of fractional Preferred Shares that are not one one-hundredth
or integral multiples of one one-hundredth of a Preferred Share, the Corporation
shall pay to the registered holders of Right Certificates at the time such
Rights are exercised as herein provided an amount in cash equal to the same
fraction of the current market value of one Preferred Share. For the purposes of
this Section 14(b), the current market value of a Preferred Share shall be the
closing price of a Preferred Share (as determined pursuant to Section 11(d)(ii)
hereof) for the Trading Day immediately prior to the date of such exercise.

         (c)  Following the occurrence of one of the transactions or events
specified in Section 11 giving rise to the right to receive Common Shares,
capital stock equivalents (other than Preferred Shares) or other securities upon
the exercise of a Right, the Corporation shall not be required to issue
fractions of shares or units of such Common 



                                       25
<PAGE>   31
Shares, capital stock equivalents or other securities upon exercise of the
Rights or to distribute certificates which evidence fractions of such Common
Shares, capital stock equivalents or other securities. In lieu of fractional
shares or units of such Common Shares, capital stock equivalents or other
securities, the Corporation may pay to the registered holders of Right
Certificates at the time such Rights are exercised as herein provided an amount
in cash equal to the same fraction of the current market value of a share or
unit of such Common Shares, capital stock equivalents or other securities. For
purposes of this Section 14(c), the current market value shall be determined in
the manner set forth in Section 11(d) hereof for the Trading Day immediately
prior to the date of such exercise and, if such capital stock equivalent is not
traded, each such capital stock equivalent shall have the value of one
one-hundredth of a Preferred Share.

         (d)  The holder of a Right by the acceptance of the Right expressly
waives his right to receive any fractional Rights or any fractional share upon
exercise of a Right (except as provided above).

     SECTION 15.  RIGHTS OF ACTION. All rights of action in respect of this
Agreement, excepting the rights of action given to the Rights Agent under
Section 18 hereof, are vested in the respective registered holders of the Right
Certificates (and, prior to the Distribution Date, the registered holders of the
Common Shares); and any registered holder of any Right Certificate (or, prior to
the Distribution Date, of the Common Shares), without the consent of the Rights
Agent or of the holder of any other Right Certificate (or, prior to the
Distribution Date, of the Common Shares), may, in his own behalf and for his own
benefit, enforce, and may institute and maintain any suit, action or proceeding
against the Corporation to enforce, or otherwise act in respect of, his right to
exercise the Rights evidenced by such Right Certificate in the manner provided
in such Right Certificate and in this Agreement. Without limiting the foregoing
or any remedies available to the holders of Rights, it is specifically
acknowledged that the holders of Rights would not have an adequate remedy at law
for any breach of this Agreement and will be entitled to specific performance of
the obligations under, and injunctive relief against actual or threatened
violations of the obligations of any Person subject to, this Agreement.

     SECTION 16.  AGREEMENT OF RIGHT HOLDERS. Every holder of a Right, by
accepting the same, consents and agrees with the Corporation and the Rights
Agent and with every other holder of a Right that:

         (a)  prior to the Distribution Date, the Rights will be transferable
only in connection with the transfer of the Common Shares;

         (b)  after the Distribution Date, the Right Certificates are
transferable only on the registry books of the Rights Agent if surrendered at
the principal office or 



                                       26
<PAGE>   32
offices of the Rights Agent designated for such purpose, duly endorsed or
accompanied by a proper instrument of transfer and with the appropriate form
fully executed;

         (c)  subject to Section 6 and Section 7(f) hereof, the Corporation and
the Rights Agent may deem and treat the person in whose name the Right
Certificate (or, prior to the Distribution Date, the associated Common Shares
certificate) is registered as the absolute owner thereof and of the Rights
evidenced thereby (notwithstanding any notations of ownership or writing on the
Right Certificate or the associated Common Shares certificate made by anyone
other than the Corporation or the Rights Agent) for all purposes whatsoever, and
neither the Corporation nor the Rights Agent, subject to the last sentence of
Section 7(e) hereof, shall be required to be affected by any notice to the
contrary; and

         (d)  notwithstanding anything in this Agreement to the contrary,
neither the Corporation nor the Rights Agent shall have any liability to any
holder of a Right or a beneficial interest in a Right or other Person as a
result of its inability to perform any of its obligations under this Agreement
by reason of any preliminary or permanent injunction or other order, decree or
ruling issued by a court of competent jurisdiction or by a governmental,
regulatory or administrative agency or commission, or any statute, rule,
regulation or executive order promulgated or enacted by any governmental
authority, prohibiting or otherwise restraining performance of such obligation;
provided, however, the Corporation must use its best efforts to have any such
order, decree or ruling lifted or otherwise overturned as soon as possible.

     SECTION 17.  RIGHT CERTIFICATE HOLDER NOT DEEMED A STOCKHOLDER. No holder,
as such, of any Right Certificate shall be entitled to vote, receive dividends
or be deemed for any purpose the holder of the Preferred Shares or any other
securities of the Corporation which may at any time be issuable on the exercise
of the Rights represented thereby, nor shall anything contained herein or in any
Right Certificate be construed to confer upon the holder of any Right
Certificate, as such, any of the rights of a stockholder of the Corporation or
any right to vote for the election of directors or upon any matter submitted to
stockholders at any meeting thereof, or to give or withhold consent to any
corporate action, or to receive notice of meetings or other actions affecting
stockholders (except as provided in Section 25 hereof), or to receive dividends
or other distributions or to exercise any preemptive or subscription rights, or
otherwise, until the Right or Rights evidenced by such Right Certificate shall
have been exercised in accordance with the provisions hereof.

     SECTION 18.  CONCERNING THE RIGHTS AGENT. The Corporation agrees to pay to
the Rights Agent reasonable compensation for all services rendered by it
hereunder and, from time to time, on demand of the Rights Agent, its reasonable
expenses and counsel fees and other disbursements incurred in the administration
and execution of this 



                                       27
<PAGE>   33
Agreement and the exercise and performance of its duties hereunder. The
Corporation also agrees to indemnify the Rights Agent for, and to hold it
harmless against, any loss, liability, or expense, incurred without negligence,
bad faith or willful misconduct on the part of the Rights Agent, for anything
done or omitted by the Rights Agent in connection with the acceptance and
administration of this Agreement, including the costs and expenses of defending
against any claim of liability in the premises. The indemnity provided for
herein shall survive the expiration of the Rights and the termination of this
Agreement.

     The Rights Agent shall be protected and shall incur no liability for, or in
respect of, any action taken, suffered or omitted by it in connection with, its
administration of this Agreement in reliance upon any Right Certificate or
certificate for Common Shares or for other securities of the Corporation,
instrument of assignment or transfer, power of attorney, endorsement, affidavit,
letter, notice, direction, consent, certificate, statement, or other paper or
document believed by it to be genuine and to be signed, executed and, where
necessary, verified or acknowledged, by the proper Person or Persons.

     SECTION 19.  MERGER OR CONSOLIDATION OR CHANGE OF NAME OF RIGHTS AGENT. Any
corporation into which the Rights Agent or any successor Rights Agent may be
merged or with which it may be consolidated, or any corporation resulting from
any merger or consolidation to which the Rights Agent or any successor Rights
Agent shall be a party, or any corporation succeeding to the stock transfer or
all or substantially all of the corporate trust business of the Rights Agent or
any successor Rights Agent, shall be the successor to the Rights Agent under
this Agreement without the execution or filing of any paper or any further act
on the part of any of the parties hereto, provided that such corporation would
be eligible for appointment as a successor Rights Agent under the provisions of
Section 21 hereof. In case at the time such successor Rights Agent shall succeed
to the agency created by this Agreement, any of the Right Certificates shall
have been countersigned but not delivered, any such successor Rights Agent may
adopt the countersignature of a predecessor Rights Agent and deliver such Right
Certificates so countersigned; and in case at that time any of the Right
Certificates shall not have been countersigned, any successor Rights Agent may
countersign such Right Certificates either in the name of the predecessor or in
the name of the successor Rights Agent; and in all such cases such Right
Certificates shall have the full force provided in the Right Certificates and in
this Agreement.

     In case at any time the name of the Rights Agent shall be changed and at
such time any of the Right Certificates shall have been countersigned but not
delivered, the Rights Agent may adopt the countersignature under its prior name
and deliver Right Certificates so countersigned; and in case at that time any of
the Right Certificates shall not have been countersigned, the Rights Agent may
countersign such Right Certificates either in its 



                                       28
<PAGE>   34
prior name or in its changed name; and in all such cases such Right Certificates
shall have the full force provided in the Right Certificates and in this
Agreement.

     SECTION 20. DUTIES OF RIGHTS AGENT. The Rights Agent undertakes only those
duties and obligations imposed by this Agreement upon the following terms and
conditions, by all of which the Corporation and the holders of Right
Certificates, by their acceptance thereof, shall be bound:

         (a)  The Rights Agent may consult with legal counsel (who may be legal
counsel for the Corporation), and the opinion of such counsel shall be full and
complete authorization and protection to the Rights Agent as to any action taken
or omitted by it in good faith and in accordance with such opinion.

         (b)  Whenever in the performance of its duties under this Agreement the
Rights Agent shall deem it necessary or desirable that any fact or matter
(including, without limitation, the identity of an Acquiring Person and the
determination of the current market price of any Security) be proved or
established by the Corporation prior to taking or suffering any action
hereunder, such fact or matter (unless other evidence in respect thereof be
herein specifically prescribed) may be deemed to be conclusively proved and
established by a certificate signed by any one of the Chairman of the Board, the
Chief Executive Officer, the President, any Vice President, the Treasurer or the
Secretary of the Corporation and delivered to the Rights Agent; and such
certificate shall be full authorization to the Rights Agent for any action taken
or suffered in good faith by it under the provisions of this Agreement in
reliance upon such certificate.

         (c)  The Rights Agent shall be liable hereunder only for its own
negligence, bad faith or willful misconduct.

         (d)  The Rights Agent shall not be liable for or by reason of any of
the statements of fact or recitals contained in this Agreement or in the Right
Certificates (except its countersignature on such Right Certificates) or be
required to verify the same, but all such statements and recitals are and shall
be deemed to have been made by the Corporation only.

         (e)  The Rights Agent shall not be under any responsibility in respect
of the validity of this Agreement or the execution and delivery hereof (except
the due execution hereof by the Rights Agent) or in respect of the validity or
execution of any Right Certificate (except its countersignature thereof); nor
shall it be responsible for any breach by the Corporation of any covenant or
condition contained in this Agreement or in any Rights Certificate; nor shall it
be responsible for any change in the exercisability of the Rights (including the
Rights becoming void pursuant to Section 7(e) hereof) or any adjustment required
under the provisions of Section 11 or Section 13 hereof or 



                                       29
<PAGE>   35
responsible for the manner, method or amount of any such adjustment or the
ascertaining of the existence of facts that would require any such adjustment
(except with respect to the exercise of Rights evidenced by Right Certificates
after receipt of the certificate described in Section 12 hereof); nor shall it
by any act hereunder be deemed to make any representation or warranty as to the
authorization or reservation of any Preferred Shares or Common Shares to be
issued pursuant to this Agreement or any Right Certificate or as to whether any
Preferred Shares or Common Shares will, when issued, be validly authorized and
issued, fully paid and non-assessable.

         (f)  The Corporation agrees that it will perform, execute, acknowledge
and deliver or cause to be performed, executed, acknowledged and delivered all
such further and other acts, instruments and assurances as may reasonably be
required by the Rights Agent for the carrying out or performing by the Rights
Agent of the provisions of this Agreement.

         (g)  The Rights Agent is hereby authorized and directed to accept
instructions with respect to the performance of its duties hereunder from any
one of the Chairman of the Board, the Chief Executive Officer, the President,
any Vice President, the Treasurer or the Secretary of the Corporation, and to
apply to such officers for advice or instructions in connection with its duties,
and shall not be liable for any action taken or suffered by it in good faith or
lack of action in accordance with instructions of any such officer or for any
delay in acting while waiting for those instructions. Any application by the
Rights Agent for written instructions from the Corporation may, at the option of
the Rights Agent, set forth in writing any action proposed to be taken or
omitted by the Rights Agent under this Rights Agreement and the date on or after
which such action shall be taken or such omission shall be effective. The Rights
Agent shall not be liable for any action taken by, or omission of, the Rights
Agent in accordance with a proposal included in any such application on or after
the date specified in such application (which date shall not be less than five
Business Days after the date any officer of the Corporation actually receives
such application, unless any such officer shall have consented in writing to an
earlier date) unless, prior to taking any such action (or the effective date in
the case of an omission), the Rights Agent shall have received written
instruction in response to such application specifying the action to be taken or
omitted.

         (h)  The Rights Agent and any stockholder, director, officer or 
employee of the Rights Agent may buy, sell or deal in any of the Rights or other
securities of the Corporation or become pecuniarily interested in any
transaction in which the Corporation may be interested, or contract with or lend
money to the Corporation or otherwise act as fully and freely as though it were
not Rights Agent under this Agreement. Nothing herein shall preclude the Rights
Agent from acting in any other capacity for the Corporation or for any other
legal entity.



                                       30
<PAGE>   36
         (i)  The Rights Agent may execute and exercise any of the rights or
powers hereby vested in it or perform any duty hereunder either itself or by or
through its attorneys or agents, and the Rights Agent shall not be answerable or
accountable for any act, default, neglect or misconduct of any such attorneys or
agents or for any loss to the Corporation resulting from any such act, default,
neglect or misconduct, provided reasonable care was exercised in the selection
and continued employment thereof.

         (j)  No provision of this Agreement shall require the Rights Agent to
expend or risk its own funds or otherwise incur any financial liability in the
performance of any of its duties hereunder or in the exercise of its rights if
there shall be reasonable grounds for believing that repayment of such funds or
adequate indemnification against such risk or liability is not reasonably
assured to it.

         (xi) If, with respect to any Rights Certificate surrendered to the
Rights Agent for exercise or transfer, the certificate attached to the form of
assignment or form of election to purchase, as the case may be, has not been
completed, the Rights Agent shall not take any further action with respect to
such requested exercise of transfer without first consulting with the
Corporation.



                                       31
<PAGE>   37
     SECTION 21.  CHANGE OF RIGHTS AGENT. The Rights Agent or any successor
Rights Agent may resign and be discharged from its duties under this Agreement
upon thirty (30) days' notice in writing mailed to the Corporation and to each
transfer agent of the Common Shares or Preferred Shares by registered or
certified mail, and to the holders of the Right Certificates by first-class
mail. The Corporation may remove the Rights Agent or any successor Rights Agent
upon sixty (60) days' notice in writing, mailed to the Rights Agent or successor
Rights Agent, as the case may be, and to each transfer agent of the Common
Shares or Preferred Shares by registered or certified mail, and to holders of
the Right Certificates by first-class mail. If the Rights Agent shall resign or
be removed or shall otherwise become incapable of acting, the Corporation shall
appoint a successor to the Rights Agent. If the Corporation shall fail to make
such appointment within a period of sixty (60) days after giving notice of such
removal or after it has been notified in writing of such resignation or
incapacity by the resigning or incapacitated Rights Agent or by the holder of a
Right Certificate (who shall, with such notice, submit his Right Certificate for
inspection by the Corporation), then the registered holder of any Right
Certificate may apply to any court of competent jurisdiction for the appointment
of a new Rights Agent. Any successor Rights Agent, whether appointed by the
Corporation or by such a court, shall be a corporation organized and doing
business under the laws of the United States or of any state of the United
States in good standing which is authorized under such laws to exercise
corporate trust or stock transfer powers and is subject to supervision or
examination by federal or state authority and which has at the time of its
appointment as Rights Agent a combined capital and surplus of at least
$100,000,000. After appointment, the successor Rights Agent shall be vested with
the same powers, rights, duties and responsibilities as if it had been
originally named as Rights Agent without further act or deed; but the
predecessor Rights Agent shall deliver and transfer to the successor Rights
Agent any property at the time held by it hereunder, and execute and deliver any
further assurance, conveyance, act or deed necessary for the purpose. Not later
than the effective date of any such appointment the Corporation shall file
notice thereof in writing with the predecessor Rights Agent and each transfer
agent of the Common Shares or Preferred Shares, and mail a notice thereof in
writing to the registered holders of the Right Certificates. Failure to give any
notice provided for in this Section 21, however, or any defect therein, shall
not affect the legality or validity of the resignation or removal of the Rights
Agent or the appointment of the successor Rights Agent, as the case may be.

     SECTION 22.  ISSUANCE OF NEW RIGHT CERTIFICATES. Notwithstanding any of the
provisions of this Agreement or of the Rights to the contrary, the Corporation
may, at its option, issue new Right Certificates evidencing Rights in such form
as may be approved by its Board of Directors to reflect any adjustment or change
in the Purchase Price and the number or kind or class of shares or other
securities or property purchasable under the Right Certificates made in
accordance with the provisions of this Agreement.


                                       32
<PAGE>   38
     In addition, in connection with the issuance or sale of Common Shares
following the Distribution Date and prior to the earlier of the Redemption Date
and the Final Expiration Date, the Corporation (a) shall with respect to Common
Shares so issued or sold pursuant to the exercise of stock options or under any
employee plan or arrangement, or upon the exercise, conversion or exchange of
securities, notes or debentures issued by the Corporation, and (b) may, in any
other case, if deemed necessary or appropriate by the Board of Directors of the
Corporation, issue Right Certificates representing the appropriate number of
Rights in connection with such issuance or sale; provided, however, that (i) the
Corporation shall not be obligated to issue any such Right Certificates if, and
to the extent that, the Corporation shall be advised by counsel that such
issuance would create a significant risk of material adverse tax consequences to
the Corporation or the Person to whom such Right Certificate would be issued,
and (ii) no Right Certificate shall be issued if, and to the extent that,
appropriate adjustment shall otherwise have been made in lieu of the issuance
thereof.

     SECTION 23.  REDEMPTION AND TERMINATION.

         (a)  (i)   The Board of Directors of the Corporation may, at its
option, redeem all but not less than all the then outstanding Rights at a
redemption price of $.01 per Right, as such amount may be appropriately adjusted
to reflect any stock split, stock dividend or similar transaction occurring
after the date hereof (such redemption price being hereinafter referred to as
the "REDEMPTION PRICE"), at any time prior to the earlier of (x) the occurrence
of a Section 11(a)(ii) Event, or (y) the Final Expiration Date.

              (ii)  In addition, the Board of Directors of the Corporation may,
at its option, at any time following the occurrence of a Section 11(a)(ii) Event
and the expiration of any period during which the holder of Rights may exercise
the rights under Section 11(a)(ii) but prior to any Section 13 Event redeem all
but not less than all of the then outstanding Rights at the Redemption Price (x)
in connection with any merger, consolidation or sale or other transfer (in one
transaction or in a series of related transactions) of assets or earning power
aggregating 50% or more of the earning power of the Corporation and its
subsidiaries (taken as a whole) in which all holders of Common Shares are
treated alike and not involving (other than as a holder of Common Shares being
treated like all other such holders) an Interested Stockholder or a Transaction
Person or (y)(aa) if and for so long as the Acquiring Person is not thereafter
the Beneficial Owner of 15% of the Common Shares, and (bb) at the time of
redemption no other Persons are Acquiring Persons.

              (iii) Notwithstanding anything to the contrary in this Agreement,
including, without limitation, the provisions of Section 23(a)(i) and (ii), in
the event that a majority of the Board 



                                       33
<PAGE>   39
of Directors of the Corporation is comprised of (i) persons elected at a meeting
or by written consent of stockholders who were not nominated by the Board of
Directors in office immediately prior to such meeting or action by written
consent, and/or (ii) successors of such persons elected to the Board of
Directors for the purpose of either facilitating a Transaction with a
Transaction Person or circumventing directly or indirectly the provisions of
this Section 23(a)(iii), then (I) the Rights may not be redeemed for a period of
365 days following the effectiveness of such election if such redemption is
reasonably likely to have the purpose or effect of facilitating a Transaction
with a Transaction Person and (II) the Rights may not be redeemed following such
365-day period if (x) such redemption is reasonably likely to have the purpose
of facilitating a Transaction with a Transaction Person and (y) during such
365-day period, the Corporation enters into any agreement, arrangement or
understanding with any Transaction Person which is reasonably likely to have the
purpose or effect of facilitating a Transaction with any Transaction Person.

         (b)  In the case of a redemption permitted under Section 23(a)(i) and
not prohibited by Section 23(a)(iii), immediately upon the date for redemption
set forth (or determined in the manner specified in) in a resolution of the
Board of Directors of the Corporation ordering the redemption of the Rights,
evidence of which shall have been filed with the Rights Agent, and without any
further action and without any notice, the right to exercise the Rights will
terminate and the only right thereafter of the holders of Rights shall be to
receive the Redemption Price for each Right so held. In the case of a redemption
permitted only under Section 23(a)(ii) and not prohibited by Section 23(a)(iii),
evidence of which shall have been filed with the Rights Agent, the right to
exercise the Rights will terminate and represent only the right to receive the
Redemption Price upon the later of ten Business Days following the giving of
such notice or the expiration of any period during which the rights under
Section 11(a)(ii) may be exercised. The Corporation shall promptly give public
notice of any such redemption; provided, however, that the failure to give, or
any defect in, any such notice shall not affect the validity of such redemption.
Within ten (10) days after such date for redemption set forth in a resolution of
the Board of Directors ordering the redemption of the Rights, the Corporation
shall mail a notice of redemption to all the holders of the then outstanding
Rights at their last addresses as they appear upon the registry books of the
Rights Agent or, prior to the Distribution Date, on the registry books of the
transfer agent for the Common Shares. Any notice which is mailed in the manner
herein provided shall be deemed given, whether or not the holder receives the
notice. Each such notice of redemption will state the method by which the
payment of the Redemption Price will be made. Neither the Corporation nor any of
its Affiliates or Associates may redeem, acquire or purchase for value any
Rights at any time in any manner other than that specifically set forth in this
Section 23 and other than in connection with the purchase of Common Shares prior
to the Distribution Date.

         (c)  The Corporation may, at its option, discharge all of its
obligations with respect to the Rights by (i) issuing a press release announcing
the manner of 



                                       34
<PAGE>   40
redemption of the Rights in accordance with this Agreement and (ii) mailing
payment of the Redemption Price to the registered holders of the Rights at their
last addresses as they appear on the registry books of the Rights Agent or,
prior to the Distribution Date, on the registry books of the Transfer Agent of
the Common Shares, and upon such action, all outstanding Rights and Right
Certificates shall be null and void without any further action by the
Corporation.

     SECTION 24.  EXCHANGE. (a) The Board of Directors of the Corporation may,
at its option, at any time after any Person becomes an Acquiring Person,
exchange all or part of the then outstanding and exercisable Rights (which shall
not include Rights that have become void pursuant to the provisions of Section
11(a)(ii) hereof) for Common Shares of the Corporation at an exchange ratio of
one Common Share per Right, appropriately adjusted to reflect any stock split,
stock dividend or similar transaction occurring after the date hereof (such
exchange ratio being hereinafter referred to as the "Exchange Ratio").
Notwithstanding the foregoing, the Board of Directors shall not be empowered to
effect such exchange at any time after any Person (other than the Corporation,
any Subsidiary of the Corporation, any employee benefit plan of the Corporation
or any such Subsidiary, any entity holding Common Shares for or pursuant to the
terms of any such plan or any trustee, administrator or fiduciary of such a
plan), together with all Affiliates and Associates of such Person, becomes the
Beneficial Owner of 50% or more of the Common shares then outstanding.

         (b)  Immediately upon the action of the Board of Directors of the
Corporation ordering the exchange of any Rights pursuant to subsection (a) of
this Section 24 and without any further action and without any notice, the right
to exercise such rights shall terminate and the only right thereafter of a
holder of such Rights shall be to receive that number of Common Shares equal to
the number of such rights held by such holder multiplied by the Exchange Ratio.
The Corporation shall promptly give public notice of any such exchange;
provided, however, that the failure to give, or any defect in, such notice shall
not affect the validity of such exchange. The Corporation promptly shall mail a
notice of any such exchange to all of the holders of such Rights at their last
addresses as they appear upon the registry books of the Rights Agent. Any notice
which is mailed in the manner herein provided shall be deemed given, whether or
not the holder receives the notice. Each such notice of exchange will state the
method by which the exchange of the Common Shares for Rights will be effected
and, in the event of any partial exchange, the number of Rights which will be
exchanged. Any partial exchange shall be effected pro rata based on the number
of Rights (other than Rights which have become void pursuant to the provisions
of Section 11(a)(ii) hereof) held by each holder of Rights.

         (c)  In any exchange pursuant to this Section 24, the Corporation, at
its option, may substitute Preferred Shares (or equivalent preferred shares, as
such term is 



                                       35
<PAGE>   41
defined in Section 11(b) hereof) for some or all of the Common Shares
exchangeable for Rights, at the initial rate of one-hundredth of a Preferred
Share (or equivalent preferred share) for each Common Share, as appropriately
adjusted to reflect adjustments in the voting rights of the Preferred Shares
pursuant to the terms thereof, so that the fraction of a Preferred Share
delivered in lieu of each Common Share shall have the same voting rights as one
Common Share.

         (d)  In the event that there shall not be sufficient Common Shares or
Preferred Shares issued but not outstanding or authorized but unissued to permit
any exchange of Rights as contemplated in accordance with this Section 24, the
Corporation shall take such action as may be necessary to authorize additional
Common Shares or Preferred Shares for issuance upon exchange of the Rights.

     SECTION 25.  NOTICE OF CERTAIN EVENTS. (a) In case the Corporation shall 
propose (i) to pay any dividend payable in stock of any class to the holders of
its Preferred Shares or to make any other distribution to the holders of its
Preferred Shares (other than a regularly quarterly cash dividend), (ii) to offer
to the holders of its Preferred Shares rights or warrants to subscribe for or to
purchase any additional Preferred Shares or shares of stock of any class or any
other securities, rights or options, (iii) to effect any reclassification of its
Preferred Shares (other than a reclassification involving only the subdivision
of outstanding Preferred Shares), (iv) to effect any consolidation or merger
into or with any other Person (other than a Subsidiary of the Corporation in a
transaction which does not violate Section 11(n) hereof), or to effect any sale
or other transfer (or to permit one or more of its Subsidiaries to effect any
sale or other transfer) in one or more transactions, of 50% or more of the
assets or earning power of the Corporation and its Subsidiaries (taken as a
whole) to any other Person or Persons (other than the Corporation and/or any of
its Subsidiaries in one or more transactions each of which does not violate
Section 11(n) hereof), or (v) to effect the liquidation, dissolution or winding
up of the Corporation, then, in each such case, the Corporation shall give to
each holder of a Right Certificate, in accordance with Section 26 hereof, a
notice of such proposed action to the extent feasible and file a certificate
with the Rights Agent to that effect, which shall specify the record date for
the purposes of such stock dividend, or distribution of rights or warrants, or
the date on which such reclassification, consolidation, merger, sale, transfer,
liquidation, dissolution, or winding up is to take place and the date of
participation therein by the holders of the Preferred Shares, if any such date
is to be fixed, and such notice shall be so given in the case of any action
covered by clause (i) or (ii) above at least twenty (20) days prior to the
record date for determining holders of the Preferred Shares for purposes of such
action, and in the case of any such other action, at least twenty (20) days
prior to the date of the taking of such proposed action or the date of
participation therein by the holders of the Preferred Shares, whichever shall be
the earlier.



                                       36
<PAGE>   42
         (b)  In case of a Section 11(a)(ii) Event, then (i) the Corporation
shall as soon as practicable thereafter give to each holder of a Right
Certificate, in accordance with Section 26 hereof, a notice of the occurrence of
such event, which notice shall describe such event and the consequences of such
event to holders of Rights under Section 11(a)(ii) hereof, and (ii) all
references in the preceding paragraph (a) to Preferred Shares shall be deemed
thereafter to refer also to Common Shares and/or, if appropriate, other
securities of the Corporation.

         SECTION 26.  NOTICES. Notices or demands authorized by this Agreement
to be given or made by the Rights Agent or by the holder of any Right
Certificate to or on the Corporation shall be sufficiently given or made if sent
by first-class mail, postage prepaid, addressed (until another address is filed
in writing with the Rights Agent) as follows:

                         Tylan General, Inc.
                         15330 Avenue of Science
                         San Diego, California  92128
                         Attention:  Chief Financial Officer

Subject to the provisions of Section 21 hereof, any notice or demand authorized
by this Agreement to be given or made by the Corporation or by the holder of any
Right Certificate to or on the Rights Agent shall be sufficiently given or made
if sent by first-class mail, postage prepaid, addressed (until another address
is filed in writing with the Corporation) as follows:

                         The First National Bank of Boston
                         Mail Stop:  45-02-62
                         150 Royall Street
                         Canton, Massachusetts  02021
                         Attention:  Managers Administration

Notices or demands authorized by this Agreement to be given or made by the
Corporation or the Rights Agent to the holder of any Right Certificate or, if
prior to the Distribution Date, to the holder of certificates representing
Common Shares shall be sufficiently given or made if sent by first-class mail,
postage prepaid, addressed to such holder at the address of such holder as shown
on the registry books of the Corporation.

         SECTION 27.  SUPPLEMENTS AND AMENDMENTS. Prior to the Distribution 
Date, the Corporation and the Rights Agent shall, if the Corporation
so directs, supplement or amend any provision of this Agreement without the
approval of any holders of certificates representing Common Shares. From and
after the Distribution Date, the Corporation and the Rights Agent shall, if the
Corporation so directs, supplement or amend this 



                                       37
<PAGE>   43
Agreement without the approval of any holders of Right Certificates in order (i)
to cure any ambiguity, (ii) to correct or supplement any provision contained
herein which may be defective or inconsistent with any other provisions herein,
(iii) to shorten or lengthen any time period hereunder or (iv) to change or
supplement the provisions hereunder in any manner which the Corporation may deem
necessary or desirable and which shall not adversely affect the interests of the
holders of Right Certificates (other than an Acquiring Person or an Affiliate or
Associate of an Acquiring Person); provided, however, that this Agreement may
not be supplemented or amended to lengthen, pursuant to clause (iii) of this
sentence, (A) a time period relating to when the Rights may be redeemed at such
time as the Rights are not then redeemable, or (B) any other time period unless
such lengthening is for the purpose of protecting, enhancing or clarifying the
rights of, and/or the benefits to, the holders of Rights. Upon the delivery of a
certificate from an appropriate officer of the Corporation which states that the
proposed supplement or amendment is in compliance with the terms of this Section
27, the Rights Agent shall execute such supplement or amendment, provided that
such supplement or amendment does not adversely affect the rights or obligations
of the Rights Agent under Section 18 or Section 20 of this Agreement. Prior to
the Distribution Date, the interests of the holders of Rights shall be deemed
coincident with the interests of the holders of Common Shares. Notwithstanding
anything contained in this Rights Agreement to the contrary, in the event that a
majority of the Board of Directors of the Corporation is comprised of (i)
persons elected at a meeting or by written consent of stockholders who were not
nominated by the Board of Directors in office immediately prior to such meeting
or written consent, and/or (ii) successors of such persons elected to the Board
of Directors for the purpose of either facilitating a Transaction with a
Transaction Person or circumventing directly or indirectly the provisions of
this Section 27, then (I) for a period of 365 days following the effectiveness
of such action, this Rights Agreement shall not be amended or supplemented in
any manner reasonably likely to have the purpose or effect of facilitating a
Transaction with a Transaction Person and (II) no amendments or supplements may
be made following such 365-day period if (x) such amendment or supplement is
reasonably likely to have the purpose of facilitating a Transaction with a
Transaction Person and (y) during such 365-day period, the Corporation enters
into any agreement, arrangement or understanding with any Transaction Person
which is reasonably likely to have the purpose or effect of facilitating a
Transaction with any Transaction Person.

     SECTION 28.  DETERMINATION AND ACTIONS BY THE BOARD OF DIRECTORS, ETC. The
Board of Directors of the Corporation shall have the exclusive power and
authority to administer this Agreement and to exercise all rights and powers
specifically granted to the Board, or the Corporation, or as may be necessary or
advisable in the administration of this Agreement, including, without
limitation, the right and power to (i) interpret the provisions of this
Agreement, and (ii) make all determinations deemed necessary or advisable for
the administration of this Agreement (including, without limitation, a



                                       38
<PAGE>   44
determination to redeem or not redeem the Rights or to amend the Agreement and
whether any proposed amendment adversely affects the interests of the holders of
Right Certificates). For all purposes of this Agreement, any calculation of the
number of Common Shares or other securities outstanding at any particular time,
including for purposes of determining the particular percentage of such
outstanding Common Shares or any other securities of which any Person is the
Beneficial Owner, shall be made in accordance with the last sentence of Rule
13d-3(d)(1)(i) of the General Rules and Regulations under the Exchange Act as in
effect on the date of this Agreement. All such actions, calculations,
interpretations and determinations (including, for purposes of clause (y) below,
all omissions with respect to the foregoing) which are done or made by the Board
in good faith, shall (x) be final, conclusive and binding on the Corporation,
the Rights Agent, the holders of the Right Certificates and all other parties,
and (y) not subject the Board to any liability to the holders of the Right
Certificates.

     SECTION 29.  SUCCESSORS. All the covenants and provisions of this Agreement
by or for the benefit of the Corporation or the Rights Agent shall bind and
inure to the benefit of their respective successors and assigns hereunder.

     SECTION 30.  BENEFITS OF THIS AGREEMENT. Nothing in this Agreement shall be
construed to give to any person or corporation other than the Corporation, the
Rights Agent and the registered holders of the Right Certificates (and, prior to
the Distribution Date, the Common Shares) any legal or equitable right, remedy
or claim under this Agreement; but this Agreement shall be for the sole and
exclusive benefit of the Corporation, the Rights Agent and the registered
holders of the Right Certificates (and, prior to the Distribution Date, the
Common Shares).

     SECTION 31.  SEVERABILITY. If any term, provision, covenant or restriction
of this Agreement is held by a court of competent jurisdiction or other
authority to be invalid, void or unenforceable, the remainder of the terms,
provisions, covenants and restrictions of this Agreement shall remain in full
force and effect and shall in no way be affected, impaired or invalidated.

     SECTION 32.  GOVERNING LAW. This Agreement, each Right and each Right
Certificate issued hereunder shall be deemed to be a contract made under the
laws of the State of Delaware and for all purposes shall be governed by and
construed in accordance with the laws of such State applicable to contracts to
be made and performed entirely within such State.

     SECTION 33.  COUNTERPARTS. This Agreement may be executed in any number of
counterparts and each of such counterparts shall for all purposes be deemed to
be an original, and all such counterparts shall together constitute but one and
the same instrument.



                                       39
<PAGE>   45
     SECTION 34. DESCRIPTIVE HEADINGS. Descriptive headings of the several
Sections of this Agreement are inserted for convenience only and shall not
control or affect the meaning or construction of any of the provisions hereof.



                                       40
<PAGE>   46
         IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
duly executed and attested, all as of the date and year first above written.


                                       TYLAN GENERAL, INC.


Attest:



By /s/ David L. Stone                  By /s/ David J. Ferran
  -------------------------------        -------------------------------    
  David L. Stone                         David J. Ferran
  Executive Vice President, Chief        Chairman of the Board of Directors,
  Financial Officer and Secretary        President and Chief Executive Officer



                                       THE FIRST NATIONAL BANK OF BOSTON

Attest:



By                                     By /s/ Gordon C. Stevenson
  -------------------------------        -------------------------------    
  Name:                                  Gordon C. Stevenson
  Title:                                 Administration Manager



                                       41
<PAGE>   47
                                                                       Exhibit A

                                     Form of

                           Certificate of Designation

                                       of

                  Series A Junior Participating Preferred Stock

                                       of

                               Tylan General, Inc.



                         (Pursuant to Section 151 of the
                        Delaware General Corporation Law)

         Tylan General, Inc., a corporation organized and existing under the
General Corporation Law of the State of Delaware (the "Corporation") hereby
certifies that the following resolution was duly adopted by the Board of
Directors of the Corporation as required by Section 151 of the General
Corporation Law of the State of Delaware at a meeting duly called and held on
July 2, 1996.

         RESOLVED, that pursuant to the authority granted to and vested in the
Board of Directors of this Corporation in accordance with the provisions of the
Certificate of Incorporation, the Board of Directors hereby creates a series of
Series A Junior Participating Preferred Stock, with a par value of $0.001 per
share, of the Corporation and hereby states the designation and number of
shares, and fixes the relative rights, preferences and limitations thereof (in
addition to the provisions set forth in the Certificate of Incorporation which
are applicable to the Preferred Stock of all classes and series) as follows:

                  Series A Junior Participating Preferred Stock



                                      A-1
<PAGE>   48
     SECTION 1.  DESIGNATION, PAR VALUE AND AMOUNT. The shares of such series
shall be designated as "SERIES A JUNIOR PARTICIPATING PREFERRED STOCK"
(hereinafter referred to as "SERIES A PREFERRED STOCK"), the shares of such
series shall be with par value of $0.001 per share, and the number of shares
constituting such series shall be 500,000; provided, however, that, if more than
a total of 500,000 shares of Series A Preferred Stock shall be issuable upon the
exercise of Rights (the "RIGHTS") issued pursuant to the Rights Agreement, dated
as of July 2, 1996 between the Corporation and The First National Bank of
Boston, as Rights Agent (as amended from time to time) (the "RIGHTS AGREEMENT"),
the Board of Directors of the Corporation, pursuant to Section 151 of the
General Corporation Law of the State of Delaware, shall direct by resolution or
resolutions that a certificate be properly executed, acknowledged and filed
providing for the total number of shares of Series A Preferred Stock authorized
to be issued to be increased (to the extent that the Certificate of
Incorporation then permits) to the largest number of whole shares (rounded up to
the nearest whole number) issuable upon exercise of the Rights.

     SECTION 2.  DIVIDENDS AND DISTRIBUTIONS.

         (a)  Subject to the prior and superior rights of the holders of any
shares of any series of Preferred Stock ranking prior and superior to the shares
of Series A Preferred Stock with respect to dividends, the holders of shares of
Series A Preferred Stock shall be entitled to receive, when, as and if declared
by the Board of Directors out of assets legally available for the purpose,
quarterly dividends payable in cash on the first business day of November,
February, May and August in each year (each such date being referred to herein
as a "QUARTERLY DIVIDEND PAYMENT DATE"), commencing on the first Quarterly
Dividend Payment Date after the first issuance of a share or fraction of a share
of Series A Preferred Stock, in an amount per share (rounded to the nearest
cent) equal to the greater of (a) $1.00 or (b) subject to the provision for
adjustment hereinafter set forth, 100 times the aggregate per share amount of
all cash dividends, and 100 times the aggregate per share amount (payable in
kind) of all non-cash dividends or other distributions other than a dividend
payable in shares of Common Stock, par value $0.001 per share, of the
Corporation (the "COMMON STOCK") or a subdivision of the outstanding shares of
Common Stock (by reclassification or otherwise), declared on the Common Stock
since the immediately preceding Quarterly Dividend Payment Date, or, with
respect to the first Quarterly Dividend Payment Date, since the first issuance
of any share or fraction of a share of Series A Preferred Stock.

         (b)  The Corporation shall declare a dividend or distribution on the
Series A Preferred Stock as provided in paragraph (a) above immediately after it
declares a dividend or distribution on the Common Stock (other than a dividend
payable in shares of Common Stock); provided that, in the event no dividend or
distribution shall have been declared on the Common Stock during the period
between any Quarterly Dividend 



                                      A-2
<PAGE>   49
Payment Date and the next subsequent Quarterly Dividend Payment Date, a dividend
of $1.00 per share on the Series A Preferred Stock shall nevertheless be payable
on such subsequent Quarterly Dividend Payment Date.

         (c)  Dividends shall begin to accrue and be cumulative on outstanding
shares of Series A Preferred Stock from the Quarterly Dividend Payment Date next
preceding the date of issue of such shares of Series A Preferred Stock, unless
the date of issue of such shares is prior to the record date for the first
Quarterly Dividend Payment Date, in which case dividends on such shares shall
begin to accrue from the date of issue of such shares, or unless the date of
issue is a Quarterly Dividend Payment Date or is a date after the record date
for the determination of holders of shares of Series A Preferred Stock entitled
to receive a quarterly dividend and before such Quarterly Dividend Payment Date,
in either of which events such dividends shall begin to accrue and be cumulative
from such Quarterly Dividend Payment Date. Accrued but unpaid dividends shall
not bear interest. Dividends paid on the shares of Series A Preferred Stock in
an amount less than the total amount of such dividends at the time accrued and
payable on such shares shall be allocated pro rata on a share-by-share basis
among all such shares at the time outstanding. The Board of Directors may fix a
record date for the determination of holders of shares of Series A Preferred
Stock entitled to receive payment of a dividend or distribution declared
thereon, which record date shall be not more than 60 days prior to the date
fixed for the payment thereof.

     SECTION 3.  VOTING RIGHTS. The holders of shares of Series A Preferred
Stock shall have the following voting rights:

         (a)  Except as provided in paragraph C of this Section 3 and subject to
the provision for adjustment hereinafter set forth, each share of Series A
Preferred Stock shall entitle the holder thereof to 100 votes on all matters
submitted to a vote of the stockholders of the Corporation.

         (b)  Except as otherwise provided herein or by law, the holders of
shares of Series A Preferred Stock and the holders of shares of Common Stock
shall vote together as one class on all matters submitted to a vote of
stockholders of the Corporation.

         (c)  (i)  If, on the date used to determine stockholders of record for
any meeting of stockholders for the election of directors, a default in
preference dividends (as defined in subparagraph (v) below) on the Series A
Preferred Stock shall exist, the holders of the Series A Preferred Stock shall
have the right, voting as a class as described in subparagraph (ii) below, to
elect two directors (in addition to the directors elected by holders of Common
Stock of the Corporation). Such right may be exercised (a) at any meeting of
stockholders for the election of directors or (b) at a meeting of the holders of
shares of Voting Preferred Stock (as hereinafter defined), called for the
purpose in 



                                      A-3
<PAGE>   50
accordance with the By-laws of the Corporation, until all such cumulative
dividends (referred to above) shall have been paid in full or until
non-cumulative dividends have been paid regularly for at least one year.

              (ii)  The right of the holders of Series A Preferred Stock to 
elect two directors, as described above, shall be exercised as a class
concurrently with the rights of holders of any other series of Preferred Stock
upon which voting rights to elect such directors have been conferred and are
then exercisable. The Series A Preferred Stock and any additional series of
Preferred Stock which the Corporation may issue and which may provide for the
right to vote with the foregoing series of Preferred Stock are collectively
referred to herein as "VOTING PREFERRED STOCK."

              (iii) Each director elected by the holders of shares of Voting
Preferred Stock shall be referred to herein as a "PREFERRED DIRECTOR." A
Preferred Director so elected shall continue to serve as such director for a
term of one year, except that upon any termination of the right of all of such
holders to vote as a class for Preferred Directors, the term of office of such
directors shall terminate. Any Preferred Director may be removed by, and shall
not be removed except by, the vote of the holders of record of a majority of the
outstanding shares of Voting Preferred Stock then entitled to vote for the
election of directors, present (in person or by proxy) and voting together as a
single class (a) at a meeting of the stockholders, or (b) at a meeting of the
holders of shares of such Voting Preferred Stock, called for the purpose in
accordance with the By-laws of the Corporation, or (c) by written consent signed
by the holders of a majority of the then outstanding shares of Voting Preferred
Stock then entitled to vote for the election of directors, taken together as a
single class.

              (iv)  So long as a default in any preference dividends on the
Series A Preferred Stock shall exist or the holders of any other series of
Voting Preferred Stock shall be entitled to elect Preferred Directors, (a) any
vacancy in the office of a Preferred Director may be filled (except as provided
in the following clause (b)) by an instrument in writing signed by the remaining
Preferred Director and filed with the Corporation and (b) in the case of the
removal of any Preferred Director, the vacancy may be filled by the vote or
written consent of the holders of a majority of the outstanding shares of Voting
Preferred Stock then entitled to vote for the election of directors, present (in
person or by proxy) and voting together as a single class, at such time as the
removal shall be effected. Each director appointed as aforesaid by the remaining
Preferred Director shall be deemed, for all purposes hereof, to be a Preferred
Director. Whenever (x) no default in preference dividends on the Series A
Preferred Stock shall exist and (y) the holders of other series of Voting
Preferred Stock shall no longer be entitled to elect such Preferred Directors,
then the number of directors constituting the Board of Directors of the
Corporation shall be reduced by two.



                                      A-4
<PAGE>   51
              (v)   For purposes hereof, a "DEFAULT IN PREFERENCE DIVIDENDS" on
the Series A Preferred Stock shall be deemed to have occurred whenever the
amount of cumulative and unpaid dividends on the Series A Preferred Stock shall
be equivalent to six full quarterly dividends or more (whether or not
consecutive), and, having so occurred, such default shall be deemed to exist
thereafter until, but only until, all cumulative dividends on all shares of the
Series A Preferred Stock then outstanding shall have been paid through the last
Quarterly Dividend Payment Date or until, but only until, non-cumulative
dividends have been paid regularly for at least one year.

         (d)  Except as set forth herein (or as otherwise required by applicable
law), holders of Series A Preferred Stock shall have no general or special
voting rights and their consent shall not be required for taking any corporate
action.

     SECTION 4.  CERTAIN RESTRICTIONS.

         (a)  Whenever quarterly dividends or other dividends or distributions
payable on the Series A Preferred Stock as provided in Section 2 are in arrears,
thereafter and until all accrued and unpaid dividends and distributions, whether
or not declared, on shares of Series A Preferred Stock outstanding shall have
been paid in full, the Corporation shall not

              (i)   declare or pay dividends, or make any other distributions,
on any shares of stock ranking junior (either as to dividends or upon
liquidation, dissolution or winding up) to the Series A Preferred Stock;

              (ii)  declare or pay dividends, or make any other distributions, 
on any shares of stock ranking on a parity (either as to dividends or upon
liquidation, dissolution or winding up) with the Series A Preferred Stock,
except dividends paid ratably on the Series A Preferred Stock and all such
parity stock on which dividends are payable or in arrears in proportion to the
total amounts to which the holders of all such shares are then entitled;

              (iii) redeem or purchase or otherwise acquire for consideration
(except as provided in (iv) below) shares of any stock ranking junior (either as
to dividends or upon liquidation, dissolution or winding up) to the Series A
Preferred Stock, provided that the Corporation may at any time redeem, purchase
or otherwise acquire shares of any such junior stock in exchange for shares of
any stock of the Corporation ranking junior (either as to dividends or upon
dissolution, liquidation or winding up) to the Series A Preferred Stock;

              (iv)  redeem or purchase or otherwise acquire for consideration 
any shares of Series A Preferred Stock, or any shares of stock ranking on a
parity (either as to dividends or upon liquidation, dissolution or winding up)
with the Series A Preferred



                                      A-5
<PAGE>   52
Stock, except in accordance with a purchase offer made in writing or by
publication (as determined by the Board of Directors) to all holders of such
shares upon such terms as the Board of Directors, after consideration of the
respective annual dividend rates and other relative rights and preferences of
the respective series and classes, shall determine in good faith will result in
fair and equitable treatment among the respective series or classes.

         (b)  The Corporation shall not permit any subsidiary of the Corporation
to purchase or otherwise acquire for consideration any shares of stock of the
Corporation unless the Corporation could, under paragraph (a) of this Section 4,
purchase or otherwise acquire such shares at such time and in such manner.

     SECTION 5.  REACQUIRED SHARES. Any shares of Series A Preferred Stock
purchased or otherwise acquired by the Corporation in any manner whatsoever
shall be retired and cancelled promptly after the acquisition thereof. All such
shares shall upon their cancellation become authorized but unissued shares of
Preferred Stock and may be reissued as part of a new series of Preferred Stock
subject to the conditions and restrictions on issuance set forth herein, in the
Certificate of Incorporation, in any other Certificate of Amendment creating a
series of Preferred Stock or as otherwise required by law.

     SECTION 6.  LIQUIDATION, DISSOLUTION OR WINDING UP.

         (a)  Subject to the prior and superior rights of holders of any shares
of any series of Preferred Stock ranking prior and superior to the shares of
Series A Preferred Stock with respect to rights upon liquidation, dissolution or
winding up (voluntary or otherwise), no distribution shall be made to the
holders of shares of stock ranking junior (either as to dividends or upon
liquidation, dissolution or winding up) to the Series A Preferred Stock unless,
prior thereto, the holders of shares of Series A Preferred Stock shall have
received $100 per share, plus an amount equal to accrued and unpaid dividends
and distributions thereon, whether or not declared, to the date of such payment
(the "SERIES A LIQUIDATION PREFERENCE"). Following the payment of the full
amount of the Series A Liquidation Preference, no additional distributions shall
be made to the holders of shares of Series A Preferred Stock unless, prior
thereto, the holders of shares of Common Stock shall have received an amount per
share (the "CAPITAL ADJUSTMENT") equal to the quotient obtained by dividing (i)
the Series A Liquidation Preference by (ii) 100 (such number in clause (ii), the
"ADJUSTMENT NUMBER"). Following the payment of the full amount of the Series A
Liquidation Preference and the Capital Adjustment in respect of all outstanding
shares of Series A Preferred Stock and Common Stock, respectively, holders of
Series A Preferred Stock and holders of Common Stock shall receive their ratable
and proportionate share of the remaining assets to be distributed in the ratio
of the Adjustment Number to 1 with respect to such Preferred Stock and Common
Stock, on a per share basis, respectively.



                                      A-6
<PAGE>   53
         (b)  In the event, however, that there are not sufficient assets
available to permit payment in full of the Series A Liquidation Preference and
the liquidation preferences of all other series of preferred stock, if any,
which rank on a parity with the Series A Preferred Stock, then such remaining
assets shall be distributed ratably to the holders of Series A Preferred Stock
and the holders of such parity shares in proportion to their respective
liquidation preferences. In the event, however, that there are not sufficient
assets available to permit payment in full of the Capital Adjustment, then such
remaining assets shall be distributed ratably to the holders of Common Stock.

     SECTION 7.  CONSOLIDATION, MERGER, ETC. In case the Corporation shall
enter into any consolidation, merger, combination or other transaction in which
the shares of Common Stock are exchanged for or changed into other stock or
securities, cash and/or any other property, then in any such case the shares of
Series A Preferred Stock shall at the same time be similarly exchanged or
changed in an amount per share (subject to the provision for adjustment
hereinafter set forth) equal to 100 times the aggregate amount of stock,
securities, cash and/or any other property (payable in kind), as the case may
be, into which or for which each share of Common Stock is changed or exchanged.

     SECTION 8.  NO REDEMPTION.  The shares of Series A Preferred Stock shall
not be redeemable.

     SECTION 9.  RANKING. The Series A Preferred Stock shall rank junior to all
other series of the Corporation's Preferred Stock as to the payment of dividends
and the distribution of assets, unless the terms of any such series shall
provide otherwise.

     SECTION 10. AMENDMENT. The Certificate of Incorporation of the Corporation
shall not be further amended in any manner which would materially alter or
change the powers, preferences or special rights of the Series A Preferred Stock
so as to affect them adversely without the affirmative vote of the holders of a
majority or more of the outstanding shares of Series A Preferred Stock, voting
separately as a class.



                                      A-7
<PAGE>   54
         IN WITNESS WHEREOF, this Certificate of Designation is executed on
behalf of the Corporation by its Chairman of the Board and attested by its
Secretary as of the 2nd day of July, 1996.




                                     --------------------------------
                                     David J. Ferran
                                     Chairman of the Board, President and Chief
                                     Executive Officer


Attest:



- --------------------------------
David L. Stone
Secretary



                                      A-8
<PAGE>   55
                                                                       EXHIBIT B


                            Form of Right Certificate


Certificate No. R-              __________ Rights


           NOT EXERCISABLE AFTER JULY 2, 2006 OR EARLIER IF REDEEMED BY THE
           CORPORATION. THE RIGHTS ARE SUBJECT TO REDEMPTION AT $.01 PER RIGHT
           ON THE TERMS SET FORTH IN THE RIGHTS AGREEMENT.



                                Right Certificate

                               Tylan General, Inc.


       This certifies that ____________________, or registered assigns, is the
registered owner of the number of Rights set forth above, each of which entitles
the owner thereof, subject to the terms, provisions and conditions of the Rights
Agreement, dated as of July 2, 1996 (the "RIGHTS AGREEMENT"), between Tylan
General, Inc., a Delaware corporation (the "CORPORATION"), and The First
National Bank of Boston (the "RIGHTS AGENT"), to purchase from the Corporation
at any time after the Distribution Date (as such term is defined in the Rights
Agreement) and prior to 5:00 P.M., San Diego time, on July 2, 2006, unless the
Rights evidenced hereby shall have been previously redeemed or exchanged by the
Corporation, at the principal office or offices of the Rights Agent designated
for such purpose, or at the office of its successor as Rights Agent, one
one-hundredth of a fully paid non-assessable share of Series A Junior
Participating Preferred Stock, without par value (the "PREFERRED Shares"), of
the Corporation, at a purchase price of $70.00 per one one-hundredth of
Preferred Share (the "PURCHASE PRICE"), upon presentation and surrender of this
Right Certificate with the Form of Election to Purchase duly executed. The
number of Rights evidenced by this Right Certificate (and the number of one
one-hundredths of a Preferred Share which may be purchased upon exercise hereof)
set forth above, and the Purchase Price set forth above, are the number and
Purchase Price as of July 2, 1996, based on the Preferred Shares as constituted
at such date.



                                      B-1
<PAGE>   56
         Upon the occurrence of a Section 11(a)(ii) Event (as such term is
defined in the Rights Agreement), if the Rights evidenced by this Right
Certificate are beneficially owned by (i) an Acquiring Person or an Affiliate or
Associate of any such Acquiring Person (as such terms are defined in the Rights
Agreement), (ii) a transferee of any such Acquiring Person, Associate or
Affiliate who becomes a transferee after the Acquiring Person becomes such, or
(iii) under certain circumstances specified in the Rights Agreement, a
transferee of any such Acquiring Person, Associate or Affiliate who becomes a
transferee prior to or concurrently with the Acquiring Person becoming such,
such Rights shall become null and void and no holder hereof shall have any right
with respect to such Rights from and after the occurrence of such Section
11(a)(ii) Event.

         As provided in the Rights Agreement, the Purchase Price and the number
of one one-hundredth of a Preferred Share or other securities which may be
purchased upon the exercise of the Rights evidenced by this Right Certificate
are subject to modification and adjustment upon the happening of certain events,
including Triggering Events (as such term is defined in the Rights Agreement).

         This Right Certificate is subject to all of the terms, provisions and
conditions of the Rights Agreement, which terms, provisions and conditions are
hereby incorporated herein by reference and made a part hereof and to which
Rights Agreement reference is hereby made for a full description of the rights,
limitations of rights, obligations, duties and immunities hereunder of the
Rights Agent, the Corporation and the holders of the Right Certificates, which
limitations of rights include the temporary suspension of the exercisability of
such Rights under the specific circumstances set forth in the Rights Agreement.
Copies of the Rights Agreement are on file at the principal executive offices of
the Corporation and the principal office or offices of the Rights Agent.

         This Right Certificate, with or without other Right Certificates, upon
surrender at the principal office of the Rights Agent, may be exchanged for
another Right Certificate or Right Certificates of like tenor and date
evidencing Rights entitling the holder to purchase a like aggregate number of
Preferred Shares or other securities as the Rights evidenced by the Right
Certificate or Right Certificates surrendered shall have entitled such holder to
purchase. If this Right Certificate shall be exercised in part, the holder shall
be entitled to receive upon surrender hereof another Right Certificate or Right
Certificates for the number of whole Rights not exercised.

         Subject to the provisions of the Rights Agreement, the Rights evidenced
by this Certificate may be redeemed by the Corporation at a redemption price of
$.01 per Right (subject to adjustment as provided in the Rights Agreement)
payable in cash.



                                      B-2
<PAGE>   57
         No fractional Preferred Shares will be issued upon the exercise of any
Right or Rights evidenced hereby (other than fractions which are one
one-hundredth or integral multiples of one one-hundredth of a Preferred Share,
which may, at the election of the Corporation, be evidenced by depositary
receipts), but in lieu thereof a cash payment will be made, as provided in the
Rights Agreement.

         No holder of this Right Certificate shall be entitled to vote or
receive dividends or be deemed for any purpose the holder of the Preferred
Shares or of any other securities of the Corporation which may at any time be
issuable on the exercise hereof, nor shall anything contained in the Rights
Agreement or herein be construed to confer upon the holder hereof, as such, any
of the rights of a stockholder of the Corporation or any right to vote for the
election of directors or upon any matter submitted to stockholders at any
meeting thereof, or to give or withhold consent to any corporate action, or to
receive notice of meetings or other actions affecting stockholders (except as
provided in the Rights Agreement), or to receive dividends or other
distributions or to exercise any preemptive or subscription rights, or
otherwise, until the Right or Rights evidenced by this Right Certificate shall
have been exercised as provided in the Rights Agreement.

         This Right Certificate shall not be valid or obligatory for any purpose
until it shall have been countersigned by the Rights Agent.

         WITNESS the facsimile signature of the proper officers of the 
Corporation and its corporate seal. Dated as of _________________.

[SEAL]
ATTEST:                                     TYLAN GENERAL, INC.



By________________________________          By________________________________
  David L. Stone                            David J. Ferran
  Executive Vice President, Chief           Chairman of the Board, President
  Financial Officer and Secretary           and Chief Executive Officer

Countersigned:

THE FIRST NATIONAL BANK OF BOSTON,
  as Rights Agent


By________________________________
  Authorized Signatory



                                      B-3
<PAGE>   58
                    Form of Reverse Side of Right Certificate

                               FORM OF ASSIGNMENT

                (To be executed by the registered holder if such
               holder desires to transfer the Right Certificate.)


FOR VALUE RECEIVED _________________________ hereby sells, assigns and transfers
unto __________________________________________________________________________
                  (Please print name and address of transferee)

this Right Certificate, together with all right, title and interest therein, and
does hereby irrevocably constitute and appoint _______________ Attorney, to
transfer the within Right Certificate on the books of the within-named
Corporation, with full power of substitution.

Dated:________________, _____

                                            ______________________________
                                            Signature


Signature Guaranteed:

         Signatures must be guaranteed by a member firm of a registered national
securities exchange, a member of the National Association of Securities Dealers,
Inc., or a commercial bank or trust company having an office or correspondent in
the United States.


         The undersigned hereby certifies that (1) the Rights evidenced by this
Right Certificate are not being sold, assigned or transferred by or on behalf of
a Person who is or was an Acquiring Person or an Affiliate or Associate thereof
(as such terms are defined in the Right Agreement) and (2) after due inquiry and
to the best knowledge of the undersigned, the undersigned did not acquire the
Rights evidenced by this Right Certificate from any Person who is or was an
Acquiring Person or an Affiliate or Associate thereof (as such terms are defined
in the Rights Agreement).

                                            ______________________________
                                            Signature


                                      B-4
<PAGE>   59
             Form of Reverse Side of Right Certificate -- continued

                          FORM OF ELECTION TO PURCHASE


                    (To be executed by the registered holder
                    if such holder desires to exercise Rights
                     represented by the Right Certificate.)


To the Rights Agent:

         The undersigned hereby irrevocably elects to exercise _________________
Rights represented by this Right Certificate to purchase the Preferred Shares,
Common Shares or other securities issuable upon the exercise of such Rights and
requests that certificates for such Preferred Shares, Common Shares or other
securities be issued in the name of:

Please insert social security or other identifying number: _____________________


______________________________________________________
(Please print name and address)



If such number of Rights shall not be all the Rights evidenced by this Right
Certificate, a new Right Certificate for the balance remaining of such Rights
shall be registered in the name of and delivered to:

Please insert social security or other identifying number: _____________________


______________________________________________________
(Please print name and address)



Dated:___________________, _____


                                            ______________________________
                                            Signature



                                      B-5
<PAGE>   60
                Form of Reverse Side of Right Certificate -- continued.

Signature Guaranteed:

         Signatures must be guaranteed by a member firm of a registered national
securities exchange, a member of the National Association of Securities Dealers,
Inc., or a commercial bank or trust company having an office or correspondent in
the United States.



The undersigned hereby certifies that (1) the Rights evidenced by this Right
Certificate are not being exercised by or on behalf of a Person who is or was an
Acquiring Person or an Affiliate or Associate thereof (as such terms are defined
in the Rights Agreement) and (2) after due inquiry and to the best knowledge of
the undersigned, the undersigned did not acquire the Rights evidenced by this
Rights Certificate from any Person who is or was an Acquiring Person or an
Affiliate or Associate thereof (as such terms are defined in the Rights
Agreement).

                                            ______________________________
                                            Signature



                                     NOTICE

         The signature on the foregoing Forms of Assignment and Election and
certificates must conform to the name as written upon the face of this Right
Certificate in every particular, without alteration or enlargement or any change
whatsoever.

         In the event the certification set forth above in the Form of
Assignment or the Form of Election to Purchase, as the case may be, is not
completed, the Corporation and the Rights Agent will deem the Beneficial Owner
of the Rights evidenced by this Right Certificate to be an Acquiring Person or
an Affiliate or Associate thereof (as such terms are defined in the Rights
Agreement) and such Assignment or Election to Purchase will not be honored.



                                      B-6
<PAGE>   61
                                                                       EXHIBIT C


                          SUMMARY OF RIGHTS TO PURCHASE
                                PREFERRED SHARES

         On July 2, 1996, the Board of Directors of Tylan General, Inc. (the
"CORPORATION") declared a dividend distribution of one preferred share purchase
right (a "RIGHT") for each outstanding share of Common Stock, par value $0.001
per share (the "COMMON SHARES"), of the Corporation. The dividend is payable to
the stockholders of record on July 15, 1996 (the "RECORD DATE"), and with
respect to Common Shares issued thereafter until the Distribution Date (as
defined below) and, in certain circumstances, with respect to Common Shares
issued after the Distribution Date. Except as set forth below, each Right, when
it becomes exercisable, entitles the registered holder to purchase from the
Corporation one one-hundredth of a share of Series A Junior Participating
Preferred Stock, without par value (the "PREFERRED SHARES"), of the Corporation
at a price of $70.00 per one one-hundredth of a Preferred Share (the "PURCHASE
PRICE"), subject to adjustment. The description and terms of the Rights are set
forth in a Rights Agreement (the "RIGHTS AGREEMENT") between the Corporation and
The First National Bank of Boston, as Rights Agent (the "RIGHTS AGENT"), dated
as of July 2, 1996.

         Initially, the Rights will be attached to all certificates representing
Common Shares then outstanding, and no separate Right Certificates will be
distributed. The Rights will separate from the Common Shares upon the earliest
to occur of (i) a person or group of affiliated or associated persons having
acquired beneficial ownership of 15% or more of the outstanding Common Shares
(except pursuant to a Permitted Offer, as hereinafter defined); or (ii) 10 days
(or such later date as the Board may determine) following the commencement of,
or announcement of an intention to make, a tender offer or exchange offer the
consummation of which would result in a person or group becoming an Acquiring
Person (as hereinafter defined) (the earliest of such dates being called the
"DISTRIBUTION DATE"). A person or group whose acquisition of Common Shares
causes a Distribution Date pursuant to clause (i) above is an "ACQUIRING
PERSON." The date that a person or group becomes an Acquiring Person is the
"SHARES ACQUISITION DATE."

         The Rights Agreement provides that, until the Distribution Date, the
Rights will be transferred with and only with the Common Shares. Until the
Distribution Date (or earlier redemption or expiration of the Rights) new Common
Share certificates issued after the Record Date upon transfer or new issuance of
Common Shares will contain a notation incorporating the Rights Agreement by
reference. Until the Distribution Date (or earlier redemption or expiration of
the Rights), the surrender for transfer of any certificates for Common Shares
outstanding as of the Record Date, even without such 



                                      C-1
<PAGE>   62
notation or a copy of this Summary of Rights being attached thereto, will also
constitute the transfer of the Rights associated with the Common Shares
represented by such certificate. As soon as practicable following the
Distribution Date, separate certificates evidencing the Rights ("RIGHT
CERTIFICATES") will be mailed to holders of record of the Common Shares as of
the close of business on the Distribution Date (and to each initial record
holder of certain Common Shares issued after the Distribution Date), and such
separate Right Certificates alone will evidence the Rights.

         THE RIGHTS ARE NOT EXERCISABLE UNTIL THE DISTRIBUTION DATE and will
expire at the close of business on July 2, 2006, unless earlier redeemed by the
Corporation as described below.

         In the event that any person becomes an Acquiring Person (except
pursuant to a tender or exchange offer which is for all outstanding Common
Shares at a price and on terms which a majority of certain members of the Board
of Directors determines to be adequate and in the best interests of the
Corporation, its stockholders and other relevant constituencies, other than such
Acquiring Person, its affiliates and associates (a "PERMITTED OFFER")), each
holder of a Right will thereafter have the right (the "FLIP-IN RIGHT") to
receive upon exercise the number of Common Shares or of one-hundredths of a
share of Preferred Shares (or, in certain circumstances, other securities of the
Corporation) having a value (immediately prior to such triggering event) equal
to two times the exercise price of the Right. Notwithstanding the foregoing,
following the occurrence of the event described above, all Rights that are, or
(under certain circumstances specified in the Rights Agreement) were,
beneficially owned by any Acquiring Person or any affiliate or associate thereof
will be null and void.

         In the event that, at any time following the Shares Acquisition Date,
(i) the Corporation is acquired in a merger or other business combination
transaction in which the holders of all of the outstanding Common Shares
immediately prior to the consummation of the transaction are not the holders of
all of the surviving corporation's voting power, or (ii) more than 50% of the
Corporation's assets or earning power is sold or transferred, in either case
with or to an Acquiring Person or any affiliate or associate or any other person
in which such Acquiring Person, affiliate or associate has an interest or any
person acting on behalf of or in concert with such Acquiring Person, affiliate
or associate, or, if in such transaction all holders of Common Shares are not
treated alike, any other person, then each holder of a Right (except Rights
which previously have been voided as set forth above) shall thereafter have the
right (the "FLIP-OVER RIGHT") to receive, upon exercise, common shares of the
acquiring company having a value equal to two times the exercise price of the
Right. The holder of a Right will continue to have the Flip-Over Right whether
or not such holder exercises or surrenders the Flip-In Right.



                                      C-2
<PAGE>   63
         The Purchase Price payable, and the number of Preferred Shares, Common
Shares or other securities issuable, upon exercise of the Rights are subject to
adjustment from time to time to prevent dilution (i) in the event of a stock
dividend on, or a subdivision, combination or reclassification of, the Preferred
Shares, (ii) upon the grant to holders of the Preferred Shares of certain rights
or warrants to subscribe for or purchase Preferred Shares at a price, or
securities convertible into Preferred Shares with a conversion price, less than
the then current market price of the Preferred Shares or (iii) upon the
distribution to holders of the Preferred Shares of evidences of indebtedness or
assets (excluding regular quarterly cash dividends) or of subscription rights or
warrants (other than those referred to above).

         The number of outstanding Rights and the number of one one-hundredths
of a Preferred Share issuable upon exercise of each Right are also subject to
adjustment in the event of a stock split of the Common Shares or a stock
dividend on the Common Shares payable in Common Shares or subdivisions,
consolidations or combinations of the Common Shares occurring, in any such case,
prior to the Distribution Date.

         Preferred Shares purchasable upon exercise of the Rights will not be
redeemable. Each Preferred Share will be entitled to a minimum preferential
quarterly dividend payment of $1.00 per share but, if greater, will be entitled
to an aggregate dividend per share of 100 times the dividend declared per Common
Share. In the event of liquidation, the holders of the Preferred Shares will be
entitled to a minimum preferential liquidation payment of $100 per share;
thereafter, and after the holders of the Common Shares receive a liquidation
payment of $1.00 per share, the holders of the Preferred Shares and the holders
of the Common Shares will share the remaining assets in the ratio of 100 to 1
(as adjusted) for each Preferred Share and Capital Share so held, respectively.
Finally, in the event of any merger, consolidation or other transaction in which
Common Shares are exchanged, each Preferred Share will be entitled to receive
100 times the amount received per Common Share. These rights are protected by
customary antidilution provisions. In the event that the amount of accrued and
unpaid dividends on the Preferred Shares is equivalent to six full quarterly
dividends or more, the holders of the Preferred Shares shall have the right,
voting as a class, to elect two directors in addition to the directors elected
by the holders of the Common Shares until all cumulative dividends on the
Preferred Shares have been paid through the last quarterly dividend payment date
or until non-cumulative dividends have been paid regularly for at least one
year.

         With certain exceptions, no adjustment in the Purchase Price will be
required until cumulative adjustments require an adjustment of at least 1% in
such Purchase Price. No fractional Preferred Shares will be issued (other than
fractions which are one one-hundredth or integral multiples of one one-hundredth
of a Preferred Share, which may, at the election of the Corporation, be
evidenced by depositary receipts) and in lieu thereof, 



                                      C-3
<PAGE>   64
an adjustment in cash will be made based on the market price of the Preferred
Shares on the last trading day prior to the date of exercise.

         At any time after a person becomes an Acquiring Person and prior to the
acquisition by such person or group of 50% or more of the Common Shares, the
Board of Directors of the Company may exchange the Rights (other than the Rights
owned by the Acquiring Person or its Associates and Affiliates, which shall have
become void) at an exchange ratio of one Common Shares per Right (subject to
Adjustment).

         At any time prior to the earlier to occur of (i) a person becoming an
Acquiring Person or (ii) the expiration of the Rights, and under certain other
circumstances, the Corporation may redeem the Rights in whole, but not in part,
at a price of $.01 per Right (the "REDEMPTION PRICE") which redemption shall be
effective upon the action of the Board of Directors. Additionally, following the
Shares Acquisition Date, the Corporation may redeem the then outstanding Rights
in whole, but not in part, at the Redemption Price, provided that such
redemption is in connection with a merger or other business combination
transaction or series of transactions involving the Corporation in which all
holders of Common Shares are treated alike but not involving an Acquiring Person
or its affiliates or associates and provided, further that this redemption right
shall not exist for 365 days following the Shares Acquisition Date under certain
circumstances.

         All of the provisions of the Rights Agreement may be amended by the
Board of Directors of the Corporation prior to the Distribution Date. After the
Distribution Date, the provisions of the Rights Agreement may be amended by the
Board in order 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, subject to certain limitations, to
shorten or lengthen any time period under the Rights Agreement.

         Until a Right is exercised, the holder thereof, as such, will have no
rights as a stockholder of the Corporation, including, without limitation, the
right to vote or to receive dividends. While the distribution of the Rights will
not be taxable to stockholders of the Corporation, stockholders may, depending
upon the circumstances, recognize taxable income should the Rights become
exercisable or upon the occurrence of certain events thereafter.

         A copy of the Rights Agreement has been filed with the Securities and
Exchange Commission as an Exhibit to a Current Report on Form 8-K dated July 3,
1996. A copy of the Rights Agreement is available free of charge from the
Corporation. This summary description of the Rights does not purport to be
complete and is qualified in its entirety by reference to the Rights Agreement,
which is hereby incorporated herein by reference.



                                      C-4

<PAGE>   1
                                                                   EXHIBIT 99.3

                           [TYLAN GENERAL LETTERHEAD]


CONTACTS:       David Ferran or David Stone     Deborah Stapleton
                Tylan General                   Stapleton Communications Inc.
                (214) 461-2401 or 2402          (415) 988-9207

              TYLAN GENERAL ACCELERATES SPAN INSTRUMENTS AGREEMENT

                   TYGN BOARD ADOPTS SHAREHOLDER RIGHTS PLAN

                         Company Comments on Q3 Outlook

        SAN DIEGO -- July 3, 1996 -- Tylan General, Inc. (NASDAQ:TYGN) and Span
Instruments Inc. today announced they have entered into an amended definitive
agreement relating to Tylan General's acquisition of Span Instruments, a Plano,
Texas-based manufacturer of high purity pressure monitoring and control
instruments. The board of directors of both companies and the stockholders of
Span Instruments have approved the amended agreement, which is expected to
close later today. Under the amended agreement, Tylan General will acquire Span
Instruments for 1.3 million shares of Tylan General common stock, as compared
to the 1.47 million shares under the original agreement. As a result of this
amendment, the approval of Tylan General stockholders is no longer required.
The stock being issued to the Span Instruments stockholders will be restricted,
and the stockholders will have certain registration rights. Under the original
terms of the transaction, all of the shares would have been registered at the
time the acquisition closed.

        The company also announced that the board has adopted a shareholder
rights plan designed to protect shareholders from various abusive takeover
tactics, including attempts to acquire control of Tylan General at an
inadequate price.

                                   -- More --
<PAGE>   2
TYGN Accelerates Span Instruments Agreement/Board Adopts Shareholder Rights
Plan/Company Comments on Q3 Outlook
July 3, 1996
Page 2

        As a result of industry trends the company has previously identified,
Tylan General said that it expects revenues and net income for its third
quarter ending July 28, 1996, to be below second quarter levels, without taking
into account the Span Instruments acquisition. The company also believes its
third quarter earnings per share will be below the earnings per share reported
in the third quarter a year ago, also without taking into account the Span
Instruments transaction.

TYLAN GENERAL ACCELERATES ACQUISITION OF SPAN INSTRUMENTS

        "The Tylan General board of directors has today reaffirmed the
strategic importance of Span Instruments to the future success of Tylan
General," said David Ferran, chairman, president and chief executive officer of
Tylan General. "Management of both companies are very excited about the
prospects presented by the new combined entity. We believe it is in both
companies' best interest to accelerate the merger, thereby dispelling any
uncertainties that would have been created had we delayed until September, as
previously scheduled."

        Ferran said that the Span Instruments product line will further
strengthen Tylan General's position as a leading supplier of process management
equipment. He also said that Span Instruments' presence in the semiconductor
and the much larger industrial process control industries will help expand the
size of Tylan General's target market.

        The acquisition will be accounted for as a pooling of interest. At the
time of the close of the acquisition, Tylan General will assume Span
Instruments' debt of approximately $20.6 million. The company expects a
one-time charge of $3.5 to $4.0 million to be recorded in its third quarter.

                                   -- More --

<PAGE>   3
TYGN Accelerates Span Instruments Agreement/Board Adopts 
Shareholder Rights Plan/
Company Comments on Q3 Outlook
July 3, 1996
Page 3



        As part of the acquisition, Don Whitson, co-founder and chief executive
officer of Span Instruments, will join Tylan General as vice chairman, chief
administrative officer and a member of the company's board of directors. George
Yurch, president of Span Instruments, will become president of the Span
Instruments Division of Tylan General. David Ferran will remain chairman,
president and chief executive officer of Tylan General.

        Span Instruments had revenues of $42.4 million in its fiscal year ended
Aug. 31, 1995.


BOARD ADOPTS SHAREHOLDER RIGHTS PLAN

        Tylan General also announced that its board of directors has adopted a
shareholder rights plan designed to protect shareholders from various abusive
takeover tactics, including attempts to acquire control of the company at an
inadequate price. The plan is also intended to provide additional protection
from partial or two-tiered takeover attempts, coercive stock accumulation
programs, street sweeps and other tactics that may be used to gain control of
the company without offering an adequate price to all shareholders.

        Under the plan, each shareholder will receive a dividend of one Right
for each share of the company's outstanding common stock. Each Right will
entitle the holder to purchase one one-hundredth of a share of new Series A
Junior Participating Preferred Stock of the company at an initial exercise
price of $70.


                                    --More--

<PAGE>   4
TYGN Accelerates Span Instruments Agreement/Board Adopts 
Shareholder Rights Plan/
Company Comments on Q3 Outlook
July 3, 1996
Page 4


        Initially, the Rights are attached to the company's common stock and
are not exercisable. They become immediately exercisable after any person or
group acquires beneficial ownership of 15 percent or more of the company's
common stock, or 10 days after any person or group announces a tender or
exchange offer that would result in that same beneficial ownership level (other
than pursuant to certain "Permitted Offers").

        If a buyer acquires a 15 percent position in the company, all Rights
holders except that buyer will be entitled to purchase Tylan General common
stock at a discounted price. The effect will be to discourage acquisitions of
more than 15 percent without prior negotiations with the board.

        The distribution of Rights will be made to common shareholders of
record on July 15, 1996, and shares of common stock that are newly issued after
that date will also carry Rights. The Rights will expire 10 years later. The
company may redeem the Rights for one cent ($0.01) each at any time before a
buyer acquires a 15 percent position in the company, and under certain other
circumstances. The Rights distribution is not taxable to stockholders. Details
of the plan are included with a letter that will be mailed to all of the
company stockholders.

        "The board continues to believe that the company can best achieve its
goal of maximizing long-term shareholder values through its current strategy of
internal product development and carefully selected strategic transactions,
such as the merger with Span Instruments," said Ferran. "By protecting our
shareholders from inadequate takeover proposals and abusive takeover tactics,
the Rights will help the board ensure that all of the company's shareholders
realize the long-term value of their investment," he said.



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<PAGE>   5
TYGN Accelerates Span Instruments Agreement/Board Adopts Shareholder Rights
Plan/Company Comments on Q3 Outlook
July 3, 1996
Page 5

        In response to the recent announcement by Danaher Corporation that it
had acquired approximately 10.4 percent of Tylan General's outstanding common
stock, Ferran said, "Danaher has made no proposals to Tylan General regarding
any possible transaction involving the two companies. We have no plans for any
meetings with Danaher."

TYLAN GENERAL COMMENTS ON Q3 OUTLOOK

        Tylan General also announced that as a result of industry trends it has
previously identified, the company expects revenues and net income for its
third quarter ending July 28, 1996, to be below second quarter levels, without
taking into account the Span Instruments acquisition. The company also believes
its third quarter earnings per share will be below the earnings per share
reported in the third quarter a year ago, without the impact of the Span
Instruments acquisition. The company reiterated that its third quarter
financial results will also be adversely impacted by the charges resulting from
the Span Instruments acquisition.

        "As we stated in our recent SEC filings, we've seen indications that
the market for semiconductor capital equipment is slowing; in fact, we are
seeing rescheduling and pushouts of some significant orders," said Ferran.



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<PAGE>   6
TYGN Accelerates Span Instruments Agreement/Board Adopts Shareholder Rights 
Plan/Company Comments on Q3 Outlook
July 3, 1996
Page 6


This news release contains forward-looking statements that involve risks and
uncertainties, including the risks associated with the integration of the Span
Instruments operations and product offerings into Tylan General's and Span
Instruments' customers, a weakening demand for semiconductor capital equipment,
downturns or slowdowns in the IC market, the company's dependence on the
capital expenditures of IC manufactures and the highly cyclical nature of the
semiconductor industry. Certain of these factors as well as additional risks
and uncertainties are detailed from time to time in Tylan General's periodic
filings with the Securities and Exchange Commission, including its Annual
Report on Form 10-K for the year ended Oct. 31, 1995 and its most recent Form
10-Q for the quarterly period ended April 28, 1996, as well as in its recently
filed registration statement on Form S-4.

Tylan General, Inc. is a San Diego-based manufacturer of precision mass flow
controllers, ultraclean gas panels and pressure measurement and control
equipment. The company's products are used in the fabrication of integrated
circuits (ICs) in addition to other manufacturing processes such as flat panel
displays and fiber optic cable manufacturing. Tylan General's worldwide
operations are directed from its offices in the United States, the United
Kingdom, France, Germany, Japan and Korea. Its stock is traded on the NASDAQ
stock market under the symbol TYGN. Further information on Tylan General may be
obtained from the company's SEC filings or by contacting the company directly.

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