UNIT INSTRUMENTS INC
SC 13G, 1996-02-13
LABORATORY APPARATUS & FURNITURE
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                  SCHEDULE 13G


                    Under the Securities Exchange Act of 1934
                                (Amendment No. )*

                             Unit Instruments, Inc.
                                (Name of Issuer)

                     Common Stock, $.15 par value per share
                         (Title of Class of Securities)

                                   90921 C100
                                 (CUSIP Number)


Check the following box if a fee is being paid with this  statement  [X]. (A fee
is not required only if the filing person:  (1) has a previous statement on file
reporting  beneficial  ownership  of more  than  five  percent  of the  class of
securities  described  in Item 1;  and (2) has  filed  no  amendment  subsequent
thereto reporting beneficial ownership of five percent or less of such class.)
(See Rule 13d-7).

*The  remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for any  subsequent  amendment  containing  information  which  would  alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).



SEC 1745 (2/92)                              Page 1 of 9 pages

<PAGE>


- --------------------                                          -----------------
CUSIP No. 90921 C100             13G                          Page 2 of 9 Pages
- --------------------                                          -----------------

- ------ ------------------------------------------------------------------------
  1    NAME OF REPORTING PERSON
       S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

       James C. Levinson

- ------ ------------------------------------------------------------------------
- ------ ------------------------------------------------------------------------
  2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                (a) [ ]
                                                                (b) [ ]

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

- ------ ------------------------------------------------------------------------
- ------ ------------------------------------------------------------------------
  4    CITIZENSHIP OR PLACE OF ORGANIZATION


       USA
- ------ ------------------------------------------------------------------------
- ----------------------- ----- -------------------------------------------------
                         5    SOLE VOTING POWER

                              0
      NUMBER OF
                        ----- -------------------------------------------------
                        ----- -------------------------------------------------
        SHARES           6    SHARED VOTING POWER
     BENEFICIALLY
       OWNED BY               543,179
                        ----- -------------------------------------------------
                        ----- -------------------------------------------------
         EACH            7    SOLE DISPOSITIVE POWER
      REPORTING
        PERSON                0
                        ----- -------------------------------------------------
                        ----- -------------------------------------------------
         WITH            8    SHARED DISPOSITIVE POWER

                              543,179
- ----------------------- ----- -------------------------------------------------
- ------ ------------------------------------------------------------------------
  9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON


       543,179
- ------ ------------------------------------------------------------------------
- ------ ------------------------------------------------------------------------
10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*


- ------ ------------------------------------------------------------------------
- ------ ------------------------------------------------------------------------
  11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9


       13.2%
- ------ ------------------------------------------------------------------------
- ------ ------------------------------------------------------------------------
  12   TYPE OF REPORTING PERSON *

       IN

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

                                Page 2 of 9 pages

<PAGE>
- --------------------                                          -----------------
CUSIP No. 90921 C100             13G                          Page 3 of 9 Pages
- --------------------                                          -----------------


- ------ ------------------------------------------------------------------------
  1    NAME OF REPORTING PERSON
       S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON


       Marilyn G. Levinson
- ------ ------------------------------------------------------------------------
- ------ ------------------------------------------------------------------------
  2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                (a) [ ]
                                                                (b) [ ]

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

- ------ ------------------------------------------------------------------------
- ------ ------------------------------------------------------------------------
  4    CITIZENSHIP OR PLACE OF ORGANIZATION


       USA
- ------ ------------------------------------------------------------------------
- ----------------------- ----- -------------------------------------------------
                         5    SOLE VOTING POWER

                              0
      NUMBER OF
                        ----- -------------------------------------------------
                        ----- -------------------------------------------------
        SHARES           6    SHARED VOTING POWER
     BENEFICIALLY
       OWNED BY               543,179
                        ----- -------------------------------------------------
                        ----- -------------------------------------------------
         EACH            7    SOLE DISPOSITIVE POWER
      REPORTING
        PERSON                0
                        ----- -------------------------------------------------
                        ----- -------------------------------------------------
         WITH            8    SHARED DISPOSITIVE POWER

                              543,179
- ----------------------- ----- -------------------------------------------------
- ------ ------------------------------------------------------------------------
  9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

       543,179

- ------ ------------------------------------------------------------------------
- ------ ------------------------------------------------------------------------
10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

- ------ ------------------------------------------------------------------------
- ------ ------------------------------------------------------------------------
  11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9


       13.2%
- ------ ------------------------------------------------------------------------
- ------ ------------------------------------------------------------------------
  12   TYPE OF REPORTING PERSON *

       IN

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


                                Page 3 of 9 pages

<PAGE>

- --------------------                                          -----------------
CUSIP No. 90921 C100             13G                          Page 4 of 9 Pages
- --------------------                                          -----------------

- ------ ------------------------------------------------------------------------
  1    NAME OF REPORTING PERSON
       S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON


       J & L Levinson Partnership
- ------ ------------------------------------------------------------------------
- ------ ------------------------------------------------------------------------
  2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                (a) [ ]
                                                                (b) [ ]

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

- ------ ------------------------------------------------------------------------
- ------ ------------------------------------------------------------------------
  4    CITIZENSHIP OR PLACE OF ORGANIZATION


       Organized under the laws of Texas
- ------ ------------------------------------------------------------------------
- ----------------------- ----- -------------------------------------------------
                         5    SOLE VOTING POWER

                              0
      NUMBER OF
                        ----- -------------------------------------------------
                        ----- -------------------------------------------------
        SHARES           6    SHARED VOTING POWER
     BENEFICIALLY
       OWNED BY               505,907
                        ----- -------------------------------------------------
                        ----- -------------------------------------------------
         EACH            7    SOLE DISPOSITIVE POWER
      REPORTING
        PERSON                0
                        ----- -------------------------------------------------
                        ----- -------------------------------------------------
         WITH            8    SHARED DISPOSITIVE POWER

                              505,907
- ----------------------- ----- -------------------------------------------------
- ------ ------------------------------------------------------------------------
  9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

       505,907

- ------ ------------------------------------------------------------------------
- ------ ------------------------------------------------------------------------
10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

- ------ ------------------------------------------------------------------------
- ------ ------------------------------------------------------------------------
  11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9


       12.4%
- ------ ------------------------------------------------------------------------
- ------ ------------------------------------------------------------------------
  12   TYPE OF REPORTING PERSON *

       PN

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

                                Page 4 of 9 pages

<PAGE>




Item 1(a).        Name of Issuer:  Unit Instruments, Inc.
                  --------------

Item 1(b).        Address of Issuer's Principal Executive Offices:
                  -----------------------------------------------
                  22600 Savi Ranch Parkway
                  Yorba Linda, CA 92687

Item 2(a).        Name of Person Filing:  James C. Levinson, Marilyn G. Levinson
                  ---------------------
                  and J & Levinson Partnership (the "Reporting Persons").

Item 2(b).        Address of Principal Business Office or, if None, Residence:
                  -----------------------------------------------------------
                  The principal business office of each of the Reporting Persons
                  is  c/o J & L  Levinson  Partnership,  700  Louisiana  Street,
                  Houston, TX 77002

Item 2(c).        Citizenship: James C. Levinson and Marilyn G. Levinson are
                  -----------
                  United States citizens. The J & L Levinson Partnership is
                  organized under the laws of Texas.

Item 2(d).        Title of Class of Securities: Common Stock, $.15 par value per
                  ----------------------------
                  share ("Common Stock").

Item 2(e).        CUSIP Number:  90921 C100
                  ------------

Item 3.           If this statement is filed pursuant to Rules 13d-1(b), or
                  ---------------------------------------------------------
                  13d-2(b), check whether the person filing is a:
                  ----------------------------------------------

                  (a) [ ] Broker or Dealer  registered  under  Section 15 of the
                  Securities Exchange Act of 1934 (the "Act").

                  (b)  [ ]     Bank as defined in Section 3(a)(6) of the Act.

                  (c)  [ ]     Insurance Company as defined in Section 3(a)(19)
                  of the Act.

                  (d)  [ ]     Investment Company registered under Section 8 of
                  the Investment Company Act of 1940.

                  (e)  [ ]     Investment Advisor registered under Section 203
                  of the Investment Advisers Act of 1940.

                  (f) [ ] Employee  Benefit Plan,  Pension Fund which is subject
                  to the provisions of the Employee  Retirement  Income Security
                  Act of 1974 or Endowment Fund; see Rule 13d-1(b)(1) (ii)(F) of
                  the Act.

                  (g)  [ ]     Parent Holding Company, in accordance with Rule
                  13d-1(b)(ii)(G) of the Act.

                  (h)  [ ]     Group, in accordance with Rule 13a-1(b)(1)(ii)(H)
                  of the Act.

                  Not applicable

                                Page 5 of 9 pages


<PAGE>


Item 4.           Ownership.
                  ---------

                  (a)      Amount Beneficially Owned:

                  By virtue of his status as a general partner of J & L
                  Levisnson Partnership (the "Partnership") James C. Levinson
                  may be deemed to beneficially own 505,907 shares held of
                  record by the Partnership. Mr. Levinson is the beneficial
                  owner of 34,007 shares through options that are currently
                  exercisable. By virtue of his status as the spouse of Marilyn
                  G. Levinson, Mr. Levinson may be deemed to beneficially own
                  3,265 shares which are beneficially owned by Mrs. Levinson
                  through options that are currently exercisable. Therefore, Mr.
                  Levinson may be deemed to be the beneficial owner of 543,179
                  shares of Common Stock.

                  By virtue of her status as a general partner of J & L
                  Levisnson Partnership (the "Partnership") Marilynn G. Levinson
                  may be deemed to beneficially own 505,907 shares held of
                  record by the Partnership. Mrs. Levinson is the beneficial
                  owner of 3,265 shares through options that are currently
                  exercisable. By virtue of her status as the spouse of James C.
                  Levinson, Mrs. Levinson may be deemed to beneficially own
                  34,007 shares which are beneficially owned by Mr. Levinson
                  through options that are currently exercisable. Therefore,
                  Mrs. Levinson may be deemed to be the beneficial owner of
                  543,179 shares of Common Stock.

                  J & L  Levinson  Partnership  is the  record  owner of 505,907
                  shares of common stock.


                  (b)      Percent of Class:

                  James C.  Levinson  and Marilyn G.  Levinson  may be deemed to
                  beneficially  own  13.2%  and  J  &  L  Levinson   Partnership
                  beneficially  owns 12.4%,  (based on the  4,079,497  shares of
                  Common Stock  reported to be  outstanding on December 31, 1995
                  in the Unit  Instruments,  Inc.  Quarterly Report on Form 10-Q
                  for the fiscal quarter ended 12/2/95).

                  (c)      Number of shares as to which such person has:

                           (i)      sole power to vote or to direct the vote:

                                    James C. Levinson:                        0
                                    Marilyn G. Levinson:                      0
                                    J & L Levinson Partnership                0

                           (ii)     shared power to vote or to direct the vote:

                                    James C. Levinson:                  543,179
                                    Marilyn G. Levinson:                543,179
                                    J & L Levinson Partnership          505,907

                                Page 6 of 9 pages

<PAGE>


                           (iii)    sole power to dispose or to direct the
                                    disposition of:

                                    James C. Levinson:                        0
                                    Marilyn G. Levinson:                      0
                                    J & L Levinson Partnership                0

                           (iv)     shared power to dispose or to direct the
                                    disposition of:

                                    James C. Levinson:                  543,179
                                    Marilyn G. Levinson:                543,179
                                    J & L Levinson Partnership          505,907

Item 5.           Ownership of Five Percent or Less of a Class.
                  --------------------------------------------

                  If this statement is being filed to report the fact that as of
                  the date  hereof  the  reporting  person  has ceased to be the
                  beneficial  owner of more  than five  percent  of the class of
                  securities, check the following [ ].

Item 6.           Ownership of More than Five Percent on Behalf of Another
                  --------------------------------------------------------
                  Person.
                  ------

                  Not applicable.

Item 7.           Identification and Classification of the Subsidiary Which
                  ---------------------------------------------------------
                  Acquired the Security Being Reported on by the Parent Holding
                  -------------------------------------------------------------
                  Company.
                  -------

                  Not  applicable.  This statement is not filed pursuant to Rule
                  13d-1(b)(ii)(G).

Item 8.           Identification and Classification of Members of the Group.
                  ---------------------------------------------------------
                  Not  applicable.  This statement is not filed pursuant to Rule
                  13d-1(b)(ii)(H).

Item 9.           Notice of Dissolution of Group.
                  ------------------------------
                  Not applicable.

Item 10.          Certification.
                  -------------

                  Not  applicable.  This statement is not filed pursuant to Rule
                  13d-1(b).



                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

                                Page 7 of 9 pages

<PAGE>


                                   SIGNATURES

         After reasonable  inquiry and to the best of my knowledge and belief, I
certify that the information  set forth in this statement is true,  complete and
correct.


Dated:  February __, 1996
                                        ---------------------------------------
                                        James C. Levinson


                                        ---------------------------------------
                                        Marilyn G. Levinson


                                        J & L LEVINSON PARTNERSHIP

                                       By:
                                           ------------------------------------
                                           James C. Levinson, General Partner


                                       By:
                                           ------------------------------------
                                           Marilyn G. Levinson, General Partner


                                Page 8 of 9 pages




                                    EXHIBIT I

         Pursuant to Rule 13d-1(f)(1) under the Securities Exchange Act of 1934,
the undersigned hereby agree that only one statement  containing the information
required  on  Amendment  No. 3 to  Schedule  13G need be filed  with  respect to
ownership  by  each  of the  undersigned  of  shares  of  Common  Stock  of Unit
Instruments, Inc.

         This Agreement may be executed in any number of  counterparts,  each of
which shall be deemed an original.


Dated:  February __, 1996
                                        ---------------------------------------
                                        James C. Levinson


                                        ---------------------------------------
                                        Marilyn G. Levinson


                                        J & L LEVINSON PARTNERSHIP

                                       By:
                                           ------------------------------------
                                           James C. Levinson, General Partner


                                       By:
                                           ------------------------------------
                                           Marilyn G. Levinson, General Partner


para564/1.181545-1

                                Page 9 of 9 pages


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