EXHIBIT 10


                      [THE CHICAGO CORPORATION LETTERHEAD]






April 13, 1995




Confidential
- ------------

General Signal Corp.
One High Ridge Park
P. O. Box 10010
Stamford, Connecticut 06904-2010

Attention:  Mr. Philip A. Goodrich
            Vice President-Corporate Development

Gentlemen:

This confidentiality agreement is sent to you on behalf of Best Power
Technology, Incorporated ("Best" or the "Company").  We have been authorized to
enter into this agreement on behalf of the Company.

In connection with your considering the possibility of participating in a joint
venture or partnership, partial or other business combination, or investment or
other transaction with respect to Best, you have requested certain financial
information and projections and other information concerning the Company.  As a
condition to the Company furnishing to you and your Representatives (as defined
herein) the Evaluation Material (as defined herein) that has not heretofore
been made available to the public, you agree that for a period of two (2) years
from the receipt of any Evaluation Material hereunder, you will (i) treat the
Evaluation Material furnished to you by the Company, or the Company's
Representatives, at any time in connection with such transaction, in accordance
with the provisions of this letter agreement, and (ii) take or abstain from
taking certain other actions herein set forth.

As used herein, the term "Evaluation Material" refers to any and all data,
reports, analyses, compilations, studies, projections, forecasts, records and
all other financial, technical, commercial or other information concerning the
business and affairs of the Company (whether prepared by the Company, its
advisors or otherwise) that may be provided to you, irrespective of the form of
the communication, by or on behalf of the Company.   The term "Evaluation
Material" also includes all analyses, compilations, studies or other material
prepared by you or your partners, directors, employees, agents, advisory,
representatives of your advisors and any commercial or investment banks
participating in the  financing of any transaction  (collectively, your
"Representatives") containing or based on in whole or in part, any information
furnished by the Company or any of its representatives.  The term


















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"Evaluation Material" does not include information which (i) is already in your
or your Representative's possession, provided that such information is not
known by  you or your Representatives  to be the  subject of another
confidentiality agreement with, or other obligation of secrecy to, the Company,
(ii) becomes generally available to the public other than as a result of a
disclosure by you or your Representatives in violation of this Agreement, or
(iii) becomes available to you or your Representatives from a source other than
the Company or its Representatives, provided that such source is not known by
you or the party receiving such information to be bound by a confidentiality
agreement with, or other obligation of secrecy to, the Company which would
prohibit such source from making such information available to the party
receiving the same, or (iv) is independently developed by you without any use
of the Evaluation Material.

In connection with the Evaluation Material:

(1)  You hereby  recognize and  acknowledge the  competitive value  and
     confidential nature of the Evaluation Material and the damage that could
     result to Best if information contained therein is disclosed to any third
     party.

(2)  You hereby agree that the Evaluation Material will be used solely for the
     purpose of evaluating a possible transaction between you and Best as set
     forth on the first page of this letter agreement. You also hereby agree
     that you will not, without the prior written consent of Best or the
     Company's authorized representative, disclose any of the Evaluation
     Material now or hereafter received or obtained from Best or Best's
     representatives to any person unless otherwise permitted by this agreement
     or unless you are required to do so by applicable law or legal process;
     provided, however, that any such information may be disclosed to your
     Representatives who need to know such information for the purpose of
     evaluating your possible participation in a transaction with Best (it
     being understood that such persons shall be informed by you of the
     confidential nature of such information and shall agree to treat such
     information confidentially).  You agree to be responsible for any breach
     of this Agreement by any of your representatives. The term "person", as
     used in this confidentiality agreement, shall be broadly construed to
     include, without limitation, any corporation, limited liability company,
     partnership or individual.

(3)  In addition, without the prior written consent of Best or

































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General Signal Corp.
April 13, 1995
Page 3



     Best's authorized representative, you will not and you will direct your
     Representatives not to disclose to any person (i) either the fact that
     discussions or negotiations are taking place concerning such a possible
     transaction or any of the terms, conditions or other facts with respect to
     any such possible transaction, including the status thereof or the
     termination of discussions or negotiations with the Company or (ii) the
     fact that this Agreement exists or that Evaluation Material has been made
     available to you; provided, however, that the foregoing shall not apply to
     such disclosures as are required by law or legal process.

(4)  If you determine not to proceed with a transaction or any transaction
     contemplated by this confidentiality agreement is not consummated: (a)
     neither you nor your Representatives shall, without the prior written
     consent of Best or Best's authorized representatives, use any of the
     Evaluation Material now or hereafter received or obtained from Best or
     Best's representatives, for any purpose; and (b) you shall redeliver to
     the Company or destroy all tangible Evaluation Material and any other
     tangible material containing, prepared on the basis of, or reflecting any
     information in the Evaluation Material (whether prepared by the Company,
     its advisors or otherwise) and will not retain any copies, extracts or
     other reproductions in whole or in part of such tangible material.

(5)  You agree that Best shall be entitled to equitable relief, including
     injunction and specific performance, in the event of any breach of this
     agreement, in addition to all other remedies available to Best at law or
     in equity.

(6)  If you are advised by your counsel that facts (a) disclosed in the
     Evaluation Material or (b) not permitted to be disclosed pursuant to
     paragraphs (2) or (3) above (other than pursuant to the provisos in those
     paragraphs), must be disclosed in accordance with applicable law or legal
     process, including disclosures necessary for you to comply with the
     Securities Exchange Act of 1934, as amended, (the "Exchange Act") and the
     rules and regulations thereunder, including any disclosures required to be
     made in accordance with Schedule 13D of the Exchange Act, such disclosures
     shall contain only those disclosures which you are legally compelled to
     disclose and shall be made at the latest time practicable consistent, in
     the opinion of your counsel, with your obligations under the Exchange Act;
     and provided that


























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General Signal Corp.
April 13, 1995
Page 4



     any disclosure required to be made by law or legal process shall first be
     disclosed to the Company in the form proposed to be otherwise disclosed at
     least one business day prior to making such disclosure and you shall
     cooperate with the Company in order that the necessary disclosures may be
     made in a manner minimizing any risk to the Company and its business.

(7)  If you or anyone to whom you supply the Evaluation Material receives a
     request to disclose all or any part of the information contained in the
     Evaluation Material or the matters referred to in the preceding paragraphs
     under the terms of a subpoena, order, civil investigative demand or
     similar process issued by a court of competent jurisdiction or by a
     governmental body, you agree to (i) immediately notify Best of the
     existence, terms and circumstances surrounding such request; (ii) take
     reasonable steps to consult with Best on the advisability of taking
     legally available steps to resist or narrow such request; and (iii) if
     disclosure of such information is required, furnish only that portion of
     the Evaluation Material which, in the opinion of your counsel, you are
     legally compelled to disclose and exercise your efforts at the expense of
     the Company to obtain an  order or other reliable assurance that
     confidential treatment will be accorded to such portion of the disclosed
     information which the Company so designates.

(8)  You hereby acknowledge that you are aware, and that you will advise each
     of your Representatives who are aware of the matters which are the subject
     of this letter, that the United States securities laws prohibit any person
     who has received  from an issuer material,  non-public information
     concerning the matters which are the subject of this letter from
     purchasing or selling securities of such issuer or from communicating such
     information to any other person under circumstances in which it is
     reasonably foreseeable that such person is likely to purchase or sell such
     securities.

(9)  You understand and agree that neither we nor Best makes any representation
     or warranty as to the accuracy or completeness of the Evaluation Material.
     The Evaluation Material is not intended to provide the sole basis for any
     investment or other decision and you understand that you must determine
     the relevance of the Evaluation Material and any decision should be based
     on such investigation as you may conclude is appropriate.  In addition,
     you agree that


























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General Signal Corp.
April 13, 1995
Page 5



     neither we nor Best, nor Best's representatives, shall have any liability
     to you, your Representatives or any other third party resulting from the
     use of the Evaluation Material by you or your Representatives, except as
     may be hereinafter agreed to in a definitive agreement against which
     liability may be claimed.

(10) You agree that, for a period of two (2) years from the date of this
     Agreement, unless such action shall have been specifically requested in
     writing by the Board of Directors of the Company, neither you nor any of
     your Representatives, affiliates or associates (as such terms are defined
     under the Exchange Act) will in any manner, directly or indirectly, (a)
     effect or seek, offer or propose (whether publicly or otherwise) to
     effect, or cause or participate in (i) any acquisition of any securities
     (or beneficial ownership thereof) or assets of the Company or any of its
     subsidiaries; (ii) any tender or exchange offer or merger or other
     business combination involving the Company or any of its subsidiaries;
     (iii) any recapitalization, restructuring, liquidation, dissolution or
     other extraordinary transaction with respect to the Company or any of its
     subsidiaries; or (iv) any "solicitation" of "proxies" (as such terms are
     used in the proxy rules of the Securities and Exchange Commission) or
     consents to vote any voting securities of the Company, (b) form, join or
     in any participate in a "group" (as defined under the Exchange Act), (c)
     otherwise act, alone or in concert with others, to seek to control or
     influence the management, Board of Directors or policies of the Company,
     (d) take any action which might force the Company to make a public
     announcement regarding any of the types of matters set forth in (a) above,
     or (e) enter into any discussions or arrangements with any third party
     with respect to any of the foregoing.  You also agree during any such
     period not to request the Company (or its directors, officers, employees
     or agents), directly or indirectly, to amend or waive any  provision of
     this paragraph.  Nothing contained in this paragraph 10 shall restrict you
     from taking any action in the event the Company publicly announces that it
     is considering a specific transaction with respect to, or has entered into
     any arrangement or understanding with respect to, the sale of all or any
     substantial portion of the Company (other than any such arrangement or
     understanding with you), or from making a tender offer for all of the
     outstanding capital stock of the Company after such time as a third party
     has commenced,



























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General Signal Corp.
April 13, 1995
Page 6



     within the meaning of Rule 14d-2 of the Exchange Act, a tender offer for
     the company at a lower value.

(11) You hereby agree that prior to consummation of a transaction contemplated
     by the first paragraph of this letter, without the prior written consent
     of the Company, neither you nor your affiliates or associates shall
     directly or indirectly, initiate, or engage or participate in any
     discussions or negotiations or enter into any agreement or arrangements
     regarding the sale of any assets of the Company except with respect to
     agreements with lenders providing financing for such transaction and
     provided that a definitive agreement then exists.

(12) You agree that if the transaction contemplated by this Agreement is not
     consummated, without the prior express written consent of the Company,
     neither you nor your agents shall directly or indirectly initiate any
     discussions or negotiations regarding the hiring of any officer or
     employee of the Company or its subsidiaries so employed at the time.
     Nothing contained  herein  shall preclude  general solicitation  of
     employment, through advertisements or similar means.

(13) You hereby represent that, as of the date hereof, you and your Affiliates
     and Associates and any other person or entity with whom you are acting in
     concert in connection with this matter or have formed a "group" within the
     meaning of Section 13(d)(3) of the Exchange Act do not beneficially own
     any shares of Common Stock of the Company for which we have any Securities
     or Exchange Act reporting responsibilities.

(14) You understand that (i) the Company and The Chicago Corporation ("TCC")
     shall conduct the process for a possible transaction as they in their sole
     discretion shall determine, (ii) the Company shall have the right to
     reject or accept any potential buyer, proposal or offer, for any reason
     whatsoever, in its sole discretion, and (iii) neither you nor any of your
     Representatives shall have any claims whatsoever against the Company or
     TCC or any of their respective directors, officers, stockholders, owners,
     affiliates or agents arising out of or relating to the transaction (other
     than those against the parties to a definitive agreement with you in
     accordance with the terms thereof).




























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General Signal Corp.
April 13, 1995
Page 7



(15) It is further understood and agreed that TCC will arrange for appropriate
     contacts for due diligence purposes. It is also understood and agreed
     that all (i) communications regarding a possible transaction, (ii)
     requests for additional information, (iii) requests for facility tours or
     management meetings  and (iv)  discussions or  questions  regarding
     procedures, will be submitted or directed exclusively to TCC, and that
     none of you or your Representatives who are aware of the Evaluation
     Material and/or the possibility of a transaction will initiate or cause to
     be initiated any communication with any director, officer or employee of
     the Company concerning the Evaluation Material, a transaction or any other
     aspect of the business, governance or direction of the Company.

(16) You agree that unless and until a definitive agreement between the Company
     and you with respect to any transaction has been executed and delivered,
     neither the Company nor you will be under any legal obligation of any kind
     whatsoever with respect to such transaction, other than as specifically
     set forth therein.

(17) This agreement may be executed in two or more counterparts, each of which
     shall be deemed to be an original, but all of which shall constitute the
     same agreement. This agreement shall expire two (2) years from the date
     of signing at which time you shall return any Evaluation Materials in your
     possession.

(18) The agreement evidenced by this confidentiality agreement shall be
     governed by the laws of the State of New York.

Please indicate your agreement with the terms of this confidentiality agreement
by signing and returning to us the enclosed copy of this confidentiality
agreement.

                              Sincerely,

                              THE CHICAGO CORPORATION



                              By:  /s/ Frederic D. Floberg
                                  ----------------------------

ACCEPTED AND AGREED
This 13th day of April, 1995

























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General Signal Corp.
April 13, 1995
Page 8




GENERAL SIGNAL CORP.

By: /s/ Philip A. Goodrich
    -------------------------
Title: Vice President


























































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