HEALTHDYNE TECHNOLOGIES INC
SC 13D/A, 1997-08-06
SURGICAL & MEDICAL INSTRUMENTS & APPARATUS
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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                             AMENDMENT NO. 2 (FINAL)
                                       to
                                  SCHEDULE 13D

                    Under the Securities Exchange Act of 1934

                          Healthdyne Technologies, Inc.
                                (Name of Issuer)

                          Common Stock, $.01 par value
                         (Title of Class of Securities)

                                    422206102
                                 (CUSIP Number)


                             Abbe L. Dienstag, Esq.
                        Kramer, Levin, Naftalis & Frankel
                                919 Third Avenue
                            New York, New York 10022
                                 (212) 715-9100
                     (Name, Address and Telephone Number of
                      Person Authorized to Receive Notices
                               and Communications)

                                  August 5, 1997 
                      (Date of Event which Requires Filing
                               of this Statement)

If the filing person has previously  filed a statement on Schedule 13G to report
the  acquisition  which is the subject of this  Schedule 13D, and is filing this
schedule because of Rule 13d-1(b)(3) or (4), check the following box: |_|


                               Page 1 of 12 pages


<PAGE>

                                  SCHEDULE 13D

CUSIP No. 422206102                                           Page 2 of 12 Pages
- --------------------------------------------------------------------------------
1)      NAME OF REPORTING PERSON
        S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                  DICKSTEIN & CO., L.P.                               13-3321472

- --------------------------------------------------------------------------------
2)      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP   (a) |_|

                                                           (b) SEE ITEM 5

- --------------------------------------------------------------------------------
3)      SEC USE ONLY

- --------------------------------------------------------------------------------
4)      SOURCE OF FUNDS

                  WC

- --------------------------------------------------------------------------------
5)      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
        PURSUANT TO ITEMS 2(d) OR 2(e)                                |_|

- --------------------------------------------------------------------------------
6)      CITIZENSHIP OR PLACE OF ORGANIZATION

                  DELAWARE

- --------------------------------------------------------------------------------
                               7)     SOLE VOTING POWER
                                      Not Applicable
        NUMBER
        OF                     8)     SHARED VOTING POWER
        SHARES                        465,000 (See Item 5)
        BENEFICIALLY
        OWNED BY               9)     SOLE DISPOSITIVE POWER
        EACH                          Not Applicable
        REPORTING
        PERSON                 10)    SHARED DISPOSITIVE POWER
        WITH                          465,000 (See Item 5)

- --------------------------------------------------------------------------------
11)     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
        PERSON 465,000 (See Item 5)

- --------------------------------------------------------------------------------
12)     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
        CERTAIN SHARES                                                |_|

- --------------------------------------------------------------------------------
13)     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
        3.6% (See Item 5)

- --------------------------------------------------------------------------------
14)     TYPE OF REPORTING PERSON
                  PN


                                      - 2 -


<PAGE>

                                  SCHEDULE 13D

CUSIP No. 422206102                                           Page 3 of 12 Pages
- --------------------------------------------------------------------------------
1)      NAME OF REPORTING PERSON
        S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                  DICKSTEIN FOCUS FUND L.P.                           13-3746015

- --------------------------------------------------------------------------------
2)      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP          (a) |_|

                                                                  (b) SEE ITEM 5

- --------------------------------------------------------------------------------
3)      SEC USE ONLY

- --------------------------------------------------------------------------------
4)      SOURCE OF FUNDS

                  WC

- --------------------------------------------------------------------------------
5)      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
        PURSUANT TO ITEMS 2(d) OR 2(e)                                |_|

- --------------------------------------------------------------------------------
6)      CITIZENSHIP OR PLACE OF ORGANIZATION

                  DELAWARE

- --------------------------------------------------------------------------------
                               7)     SOLE VOTING POWER
                                      Not Applicable
        NUMBER
        OF                     8)     SHARED VOTING POWER
        SHARES                        92,500 (See Item 5)
        BENEFICIALLY
        OWNED BY               9)     SOLE DISPOSITIVE POWER
        EACH                          Not Applicable
        REPORTING
        PERSON                 10)    SHARED DISPOSITIVE POWER
        WITH                          92,500 (See Item 5)

- --------------------------------------------------------------------------------
11)     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
        PERSON 92,500 (See Item 5)

- --------------------------------------------------------------------------------
12)     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
        CERTAIN SHARES                                                |_|

- --------------------------------------------------------------------------------
13)     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
        .7% (See Item 5)

- --------------------------------------------------------------------------------
14)     TYPE OF REPORTING PERSON
                  PN


                                      - 3 -

<PAGE>

                                  SCHEDULE 13D

CUSIP No. 422206102                                           Page 4 of 12 Pages
- --------------------------------------------------------------------------------
1)      NAME OF REPORTING PERSON
        S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                  DICKSTEIN INTERNATIONAL LIMITED

- --------------------------------------------------------------------------------
2)      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP       (a) |_|

                                                               (b) SEE ITEM 5

- --------------------------------------------------------------------------------
3)      SEC USE ONLY

- --------------------------------------------------------------------------------
4)      SOURCE OF FUNDS

                  WC

- --------------------------------------------------------------------------------
5)      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
        PURSUANT TO ITEMS 2(d) OR 2(e)                                |_|

- --------------------------------------------------------------------------------
6)      CITIZENSHIP OR PLACE OF ORGANIZATION

                  BRITISH VIRGIN ISLANDS

- --------------------------------------------------------------------------------
                               7)     SOLE VOTING POWER
                                      Not Applicable
        NUMBER
        OF                     8)     SHARED VOTING POWER
        SHARES                        79,000 (See Item 5)
        BENEFICIALLY
        OWNED BY               9)     SOLE DISPOSITIVE POWER
        EACH                          Not Applicable
        REPORTING
        PERSON                 10)    SHARED DISPOSITIVE POWER
        WITH                          79,000 (See Item 5)

- --------------------------------------------------------------------------------
11)     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
        PERSON 79,000 (See Item 5)

- --------------------------------------------------------------------------------
12)     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
        CERTAIN SHARES                                                |_|

- --------------------------------------------------------------------------------
13)     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
        .6% (See Item 5)

- --------------------------------------------------------------------------------
14)     TYPE OF REPORTING PERSON
                  CO


                                      - 4 -


<PAGE>

                                  SCHEDULE 13D

CUSIP No. 422206102                                           Page 5 of 12 Pages
- --------------------------------------------------------------------------------
1)      NAME OF REPORTING PERSON
        S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                  DICKSTEIN PARTNERS, L.P.                            13-3544838

- --------------------------------------------------------------------------------
2)      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP          (a) |_|

                                                                  (b) SEE ITEM 5

- --------------------------------------------------------------------------------
3)      SEC USE ONLY

- --------------------------------------------------------------------------------
4)      SOURCE OF FUNDS

                  AF

- --------------------------------------------------------------------------------
5)      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
        PURSUANT TO ITEMS 2(d) OR 2(e)                                |_|

- --------------------------------------------------------------------------------
6)      CITIZENSHIP OR PLACE OF ORGANIZATION

                  DELAWARE

- --------------------------------------------------------------------------------
                               7)     SOLE VOTING POWER
                                      Not Applicable
        NUMBER
        OF                     8)     SHARED VOTING POWER
        SHARES                        557,500 (See Item 5)
        BENEFICIALLY
        OWNED BY               9)     SOLE DISPOSITIVE POWER
        EACH                          Not Applicable
        REPORTING
        PERSON                 10)    SHARED DISPOSITIVE POWER
        WITH                          557,500 (See Item 5)

- --------------------------------------------------------------------------------
11)     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
        PERSON 557,500 (See Item 5)

- --------------------------------------------------------------------------------
12)     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
        CERTAIN SHARES                                                |_|

13)     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
        4.4% (See Item 5)

14)     TYPE OF REPORTING PERSON
                  PN


                                      - 5 -


<PAGE>

                                  SCHEDULE 13D

CUSIP No. 422206102                                           Page 6 of 12 Pages
- --------------------------------------------------------------------------------
1)      NAME OF REPORTING PERSON
        S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                  DICKSTEIN PARTNERS INC.                             13-3537972

- --------------------------------------------------------------------------------
2)      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP      (a) |_|

                                                              (b) SEE ITEM 5

- --------------------------------------------------------------------------------
3)      SEC USE ONLY

4)      SOURCE OF FUNDS

                  AF

5)      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
        PURSUANT TO ITEMS 2(d) OR 2(e)                                |_|

- --------------------------------------------------------------------------------
6)      CITIZENSHIP OR PLACE OF ORGANIZATION

                  DELAWARE

- --------------------------------------------------------------------------------
                               7)     SOLE VOTING POWER
                                      Not Applicable
        NUMBER
        OF                     8)     SHARED VOTING POWER
        SHARES                        636,500 (See Item 5)
        BENEFICIALLY
        OWNED BY               9)     SOLE DISPOSITIVE POWER
        EACH                          Not Applicable
        REPORTING
        PERSON                 10)    SHARED DISPOSITIVE POWER
        WITH                          636,500 (See Item 5)

- --------------------------------------------------------------------------------
11)     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
        PERSON 636,500 (See Item 5)

- --------------------------------------------------------------------------------
12)     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
        CERTAIN SHARES                                                |_|

- --------------------------------------------------------------------------------
13)     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
        4.99% (See Item 5)

- --------------------------------------------------------------------------------
14)     TYPE OF REPORTING PERSON
                  CO


                                      - 6 -


<PAGE>

                                  SCHEDULE 13D

CUSIP No. 422206102                                           Page 7 of 12 Pages
- --------------------------------------------------------------------------------
1)      NAME OF REPORTING PERSON
        S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                  MARK DICKSTEIN

- --------------------------------------------------------------------------------
2)      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP     (a) |_|

                                                             (b) SEE ITEM 5

- --------------------------------------------------------------------------------
3)      SEC USE ONLY

- --------------------------------------------------------------------------------
4)      SOURCE OF FUNDS

                  AF

- --------------------------------------------------------------------------------
5)      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
        PURSUANT TO ITEMS 2(d) OR 2(e)                                |_|

- --------------------------------------------------------------------------------
6)      CITIZENSHIP OR PLACE OF ORGANIZATION

                  UNITED STATES

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

- --------------------------------------------------------------------------------
                               7)     SOLE VOTING POWER
                                      Not Applicable
        NUMBER
        OF                     8)     SHARED VOTING POWER
        SHARES                        636,500 (See Item 5)
        BENEFICIALLY
        OWNED BY               9)     SOLE DISPOSITIVE POWER
        EACH                          Not Applicable
        REPORTING
        PERSON                 10)    SHARED DISPOSITIVE POWER
        WITH                          636,500 (See Item 5)

- --------------------------------------------------------------------------------
11)     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
        PERSON 636,500 (See Item 5)

- --------------------------------------------------------------------------------
12)     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
        CERTAIN SHARES                                                |_|

- --------------------------------------------------------------------------------
13)     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
        4.99% (See Item 5)

- --------------------------------------------------------------------------------
14)     TYPE OF REPORTING PERSON
                  IN


                                      - 7 -


<PAGE>

                     Amendment No. 2 (Final) to Schedule 13D


         This  statement  amends the Schedule  13D,  dated June 26,  1997,  (the
"Schedule  13D") as amended  by  Amendment  No. 1 dated  July 28,  1997 filed by
Dickstein & Co., L.P. ("Dickstein & Co."), Dickstein Focus Fund L.P. ("Dickstein
Focus"), Dickstein International Limited ("Dickstein International"),  Dickstein
Partners,  L.P.  ("Dickstein  Partners"),  Dickstein  Partners Inc.  ("Dickstein
Inc.") and Mark Dickstein with respect to the Common Stock,  $.01 par value (the
"Common Stock") of Healthdyne  Technologies,  Inc., a Georgia  corporation  (the
"Company").  Notwithstanding this Amendment No. 2, the Schedule 13D speaks as of
its date.  Capitalized terms used without  definition have the meanings ascribed
to them in the Schedule 13D.

I.   ITEM  3 OF  THE  SCHEDULE  13D,  "SOURCE  AND  AMOUNT  OF  FUNDS  OR  OTHER
     CONSIDERATION" IS AMENDED AND RESTATED IN ITS ENTIRETY AS FOLLOWS:

         "The shares of Common  Stock  reported to be owned by  Dickstein & Co.,
Dickstein  Focus and Dickstein  International  were acquired in the open market.
Giving  effect to certain  purchases  and sales of the Common Stock made by each
such entity, the total cost of the reported shares by Dickstein & Co., Dickstein
Focus and Dickstein  International  was  $6,487,838,  $1,413,573 and $1,100,561,
respectively.  Such costs were funded out of working capital,  which may, at any
given time,  include margin loans made by brokerage firms in the ordinary course
of business."

II.  ITEMS 5(A),  5(C) AND 5(E) OF THE SCHEDULE 13D,  "INTEREST IN SECURITIES OF
     THE ISSUER," IS AMENDED AND RESTATED AS FOLLOWS:

         "(a) The  Reporting  Persons  beneficially  own an aggregate of 636,500
shares of Common  Stock,  representing  approximately  4.99% of the Common Stock
outstanding.   Dickstein  &  Co.  owns  465,000  of  such  shares,  representing
approximately 3.6% of the Common Stock outstanding,  Dickstein Focus owns 92,500
of such shares,  representing  approximately .7% of the Common Stock outstanding
and   Dickstein   International   beneficially   owns  79,000  of  such  shares,
representing approximately .6% of the Common Stock outstanding.(1)

(1)  Percentages  are based  upon  12,741,408  shares of Common  Stock  reported
     outstanding  as of May 1, 1997 in the  Company's  Quarterly  Report on Form
     10-Q for the quarter ended March 31, 1997.

         (c)  Except  for the  transactions  set forth on  Schedule  II  annexed
hereto,  Schedule II to Amendment  No. 1 to Schedule 13D dated July 28, 1997 and
on Schedule II to the Schedule 13D, none of the persons identified in Item 2 has
effected any  transactions in the Common Stock during the past 60 days. All such
transactions were effected in the open market.


                                      - 8 -

<PAGE>

         (e) The Reporting  Persons  ceased to be the  beneficial  owner of more
than 5% of the  Common  Stock on  August 5,  1997.  Accordingly,  the  Reporting
Persons  no  longer  have a  reporting  obligation  under  Section  13(d) of the
Exchange Act with respect to the Common Stock, and the Reporting  Persons intend
not to further  amend  their  report on Schedule  13D to reflect  changes in the
facts set forth herein which may occur after the date hereof."




                                      - 9 -


<PAGE>
xxx


                                    SIGNATURE


         After  reasonable  inquiry and to the best  knowledge and belief of the
undersigned,  the  undersigned  certifies that the information set forth in this
Statement is true, complete and correct.

Date:  August 6, 1997

                                      DICKSTEIN & CO., L.P.

                                      By:      Alan Cooper, as Vice President
                                               of Dickstein Partners Inc.,
                                               the general partner of
                                               Dickstein Partners, L.P., the
                                               general partner of Dickstein &
                                               Co., L.P.

                                      /s/ Alan Cooper
                                      ---------------
                                      Name:  Alan Cooper

                                      DICKSTEIN FOCUS FUND L.P.

                                      By:      Alan Cooper, as Vice President
                                               of Dickstein Partners Inc.,
                                               the general partner of
                                               Partners, L.P., the general
                                               partner of Dickstein Focus
                                               Fund L.P.

                                      /s/ Alan Cooper
                                      ---------------
                                      Name:  Alan Cooper

                                      DICKSTEIN INTERNATIONAL LIMITED

                                      By:      Alan Cooper, as Vice President
                                               of Dickstein Partners Inc.,
                                               the agent of Dickstein
                                               International Limited

                                      /s/ Alan Cooper
                                      ---------------
                                      Name:  Alan Cooper

                                      DICKSTEIN PARTNERS, L.P.

                                      By:      Alan Cooper, as Vice President
                                               of Dickstein Partners Inc.,
                                               the general partner of
                                               Dickstein Partners, L.P.

                                      /s/ Alan Cooper
                                      ---------------
                                      Name:  Alan Cooper


                                     - 12 -


<PAGE>

                                       DICKSTEIN PARTNERS INC.

                                       By:      Alan Cooper, as Vice President

                                       /s/ Alan Cooper
                                       ---------------
                                       Name:  Alan Cooper

                                       /s/ Mark Dickstein
                                       ------------------
                                       Mark Dickstein
                                       Vice President of Dickstein Inc.


                                     - 11 -

<PAGE>



                                   SCHEDULE II

                             TRANSACTIONS IN COMMON
                                    STOCK OF
                          HEALTHDYNE TECHNOLOGIES, INC.



Shares Sold by Dickstein & Co., L.P.
- ------------------------------------
<TABLE>
<CAPTION>
                         Number of
                          Shares              Price per                                                 Total
Date                       Sold                 share                Commission                       Proceeds
- ----                       ----                 -----                ----------                       --------

<C>  <C>                   <C>                <C>                      <C>                           <C>       
7/29/97                    15,200             16.500                   15.00                         250,776.64
7/30/97                    16,000             16.625                   15.00                         265,976.13
7/31/97                    20,000             16.965                   15.00                         339,273.69
8/5/97                     15,000             16.750                  135.00                         251,106.63



Shares Sold by Dickstein International Limited
- ----------------------------------------------

                         Number of
                          Shares              Price per                                                 Total
Date                       Sold                 share                Commission                       Proceeds
- ----                       ----                 -----                ----------                       --------

7/29/97                     2,600             16.500                   15.00                          42,883.57
7/30/97                     1,400             16.625                   15.00                          23,259.22
7/31/97                     3,500             16.965                   15.00                          59,360.52
8/5/97                      2,500             16.750                   90.00                          41,783.60



Shares Sold by Dickstein Focus Fund L.P.
- ----------------------------------------

                         Number of
                          Shares              Price per                                                 Total
Date                       Sold                 share                Commission                       Proceeds
- ----                       ----                 -----                ----------                       --------

7/29/97                     3,100             16.500                   15.00                          51,133.30
7/30/97                     2,400             16.625                   15.00                          39,883.67
7/31/97                     4,000             16.965                   15.00                          67,842.74
8/5/97                      3,500             16.750                  120.00                          58,503.05
</TABLE>


                                     - 10 -



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