<PAGE>
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13D
Under the Securities Exchange Act of 1934
Amendment No. 17
GENCOR INDUSTRIES, INC.
--------------------------------------------------------------
(Name of Issuer)
Common Stock
--------------------------------------------------------------
(Title of Class of Securities)
368-678-108
--------------------------------------------------------------
(CUSIP Number)
Harvey Houtkin, c/o All-Tech Investment Group, Inc.
160 Summit Avenue, Montvale, New Jersey 07645/(201) 782-0200
--------------------------------------------------------------
(Name, Address and Telephone Number of Person Authorized
to Receive Notices and Communications)
June 30, 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 /X/.
Check the following box if a fee is being paid with this statement / /. (A
fee is not required only if the reporting 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.)
NOTE: Six copies of this statement, including all exhibits, should be filed
with the Commission. See Rule 13d-1(a) for other parties to whom copies are
to be sent.
*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 disclosures provided in a prior cover page.
The information required on 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).
Page 1 of 11
<PAGE>
CUSIP No. 368-678-108 13D Page 2 of 11 Pages
- -------------------------------------------------------------------------------
(1) Names of Reporting Persons. S.S. or I.R.S. Identification Nos. of Above
Persons
All-Tech Investement Group, Inc.
- -------------------------------------------------------------------------------
(2) Check the Appropriate Box if a Member (a) /X/
of a Group* (b) / /
- -------------------------------------------------------------------------------
(3) SEC Use Only
- -------------------------------------------------------------------------------
(4) Source of Funds*
WC OO
- -------------------------------------------------------------------------------
(5) Check if Disclosure of Legal Proceedings is Required Pursuant to
Items 2(d) or 2(e)
- -------------------------------------------------------------------------------
(6) Citizenship or Place of Organization
New York
- -------------------------------------------------------------------------------
Number of Shares (7) Sole Voting
Beneficially Owned Power -0-
by Each Reporting --------------------------------------------------
Person With (8) Shared Voting
Power -0-
--------------------------------------------------
(9) Sole Dispositive
Power -0-
--------------------------------------------------
(10) Shared Dispositive
Power -0-
- -------------------------------------------------------------------------------
(11) Aggregate Amount Beneficially Owned by Each Reporting Person
-0-
- -------------------------------------------------------------------------------
(12) Check if the Aggregate Amount in Row (11) Excludes Certain Shares*
- -------------------------------------------------------------------------------
(13) Percent of Class Represented by Amount in Row (11)
0.0%
- -------------------------------------------------------------------------------
(14) Type of Reporting Person*
BD
- -------------------------------------------------------------------------------
<PAGE>
CUSIP No. 368-678-108 13D Page 3 of 11 Pages
- -------------------------------------------------------------------------------
(1) Names of Reporting Persons. S.S. or I.R.S. Identification Nos. of Above
Persons
Rushmore Financial Services, Inc.
- -------------------------------------------------------------------------------
(2) Check the Appropriate Box if a Member (a) /X/
of a Group* (b) / /
- -------------------------------------------------------------------------------
(3) SEC Use Only
- -------------------------------------------------------------------------------
(4) Source of Funds*
WC OO
- -------------------------------------------------------------------------------
(5) Check if Disclosure of Legal Proceedings is Required Pursuant to
Items 2(d) or 2(e)
- -------------------------------------------------------------------------------
(6) Citizenship or Place of Organization
New Jersey
- -------------------------------------------------------------------------------
Number of Shares (7) Sole Voting
Beneficially Owned Power -0-
by Each Reporting --------------------------------------------------
Person With (8) Shared Voting
Power -0-
--------------------------------------------------
(9) Sole Dispositive
Power -0-
--------------------------------------------------
(10) Shared Dispositive
Power -0-
- -------------------------------------------------------------------------------
(11) Aggregate Amount Beneficially Owned by Each Reporting Person
-0-
- -------------------------------------------------------------------------------
(12) Check if the Aggregate Amount in Row (11) Excludes Certain Shares*
- -------------------------------------------------------------------------------
(13) Percent of Class Represented by Amount in Row (11)
0.0%
- -------------------------------------------------------------------------------
(14) Type of Reporting Person*
CO
- -------------------------------------------------------------------------------
<PAGE>
CUSIP No. 368-678-108 13D Page 4 of 11 Pages
- -------------------------------------------------------------------------------
(1) Names of Reporting Persons. S.S. or I.R.S. Identification Nos. of Above
Persons
Harvey Houtkin
- -------------------------------------------------------------------------------
(2) Check the Appropriate Box if a Member (a) /X/
of a Group* (b) / /
- -------------------------------------------------------------------------------
(3) SEC Use Only
- -------------------------------------------------------------------------------
(4) Source of Funds*
PF WC OO
- -------------------------------------------------------------------------------
(5) Check if Disclosure of Legal Proceedings is Required Pursuant to
Items 2(d) or 2(e) /X/
- -------------------------------------------------------------------------------
(6) Citizenship or Place of Organization
United States
- -------------------------------------------------------------------------------
Number of Shares (7) Sole Voting
Beneficially Owned Power 115,139
by Each Reporting --------------------------------------------------
Person With (8) Shared Voting
Power 518
--------------------------------------------------
(9) Sole Dispositive
Power 115,139
--------------------------------------------------
(10) Shared Dispositive
Power 518
- -------------------------------------------------------------------------------
(11) Aggregate Amount Beneficially Owned by Each Reporting Person
115,657
- -------------------------------------------------------------------------------
(12) Check if the Aggregate Amount in Row (11) Excludes Certain Shares*
/X/
- -------------------------------------------------------------------------------
(13) Percent of Class Represented by Amount in Row (11)
6.1%
- -------------------------------------------------------------------------------
(14) Type of Reporting Person*
IN
- -------------------------------------------------------------------------------
<PAGE>
CUSIP No. 368-678-108 13D Page 5 of 11 Pages
- -------------------------------------------------------------------------------
(1) Names of Reporting Persons. S.S. or I.R.S. Identification Nos. of Above
Persons
Sherry Houtkin
- -------------------------------------------------------------------------------
(2) Check the Appropriate Box if a Member (a) /X/
of a Group* (b) / /
- -------------------------------------------------------------------------------
(3) SEC Use Only
- -------------------------------------------------------------------------------
(4) Source of Funds*
PF
- -------------------------------------------------------------------------------
(5) Check if Disclosure of Legal Proceedings is Required Pursuant to
Items 2(d) or 2(e)
- -------------------------------------------------------------------------------
(6) Citizenship or Place of Organization
United States
- -------------------------------------------------------------------------------
Number of Shares (7) Sole Voting
Beneficially Owned Power 128,489
by Each Reporting --------------------------------------------------
Person With (8) Shared Voting
Power -0-
--------------------------------------------------
(9) Sole Dispositive
Power 128,489
--------------------------------------------------
(10) Shared Dispositive
Power -0-
- -------------------------------------------------------------------------------
(11) Aggregate Amount Beneficially Owned by Each Reporting Person
128,489
- -------------------------------------------------------------------------------
(12) Check if the Aggregate Amount in Row (11) Excludes Certain Shares*
/X/
- -------------------------------------------------------------------------------
(13) Percent of Class Represented by Amount in Row (11)
6.8%
- -------------------------------------------------------------------------------
(14) Type of Reporting Person*
IN
- -------------------------------------------------------------------------------
<PAGE>
CUSIP No. 368-678-108 13D Page 6 of 11 Pages
- -------------------------------------------------------------------------------
(1) Names of Reporting Persons. S.S. or I.R.S. Identification Nos. of Above
Persons
Mark Shefts
- -------------------------------------------------------------------------------
(2) Check the Appropriate Box if a Member (a) /X/
of a Group* (b) / /
- -------------------------------------------------------------------------------
(3) SEC Use Only
- -------------------------------------------------------------------------------
(4) Source of Funds*
WC
- -------------------------------------------------------------------------------
(5) Check if Disclosure of Legal Proceedings is Required Pursuant to
Items 2(d) or 2(e)
- -------------------------------------------------------------------------------
(6) Citizenship or Place of Organization
United States
- -------------------------------------------------------------------------------
Number of Shares (7) Sole Voting
Beneficially Owned Power -0-
by Each Reporting --------------------------------------------------
Person With (8) Shared Voting
Power 518
--------------------------------------------------
(9) Sole Dispositive
Power -0-
--------------------------------------------------
(10) Shared Dispositive
Power 518
- -------------------------------------------------------------------------------
(11) Aggregate Amount Beneficially Owned by Each Reporting Person
518
- -------------------------------------------------------------------------------
(12) Check if the Aggregate Amount in Row (11) Excludes Certain Shares*
/X/
- -------------------------------------------------------------------------------
(13) Percent of Class Represented by Amount in Row (11)
0.0%
- -------------------------------------------------------------------------------
(14) Type of Reporting Person*
IN
- -------------------------------------------------------------------------------
<PAGE>
Item 1. Security and Issuer
Common Stock
Gencor Industries, Inc.
5201 North Orange Blossom Trail
Orlando, FL 32810
Item 2. Identity and Background
(a) All-Tech Investment Group, Inc.
(b) 160 Summit Avenue
Montvale, New Jersey 07645
(c) Registered broker/dealer, 160 Summit Avenue, Montvale, NJ 07645
(d) No
(e) No
(f) New York
90.5% of the shares of All-Tech Investment Group, Inc. ("All-Tech"), a
registered broker/dealer which makes a market in the issuer's stock,
are owned by Rushmore Financial Services, Inc. ("Rushmore"). All-Tech
previously filed a Report on Schedule 13D with respect to the issuer;
this joint filing constitutes Amendment No. 17 thereto. Information
with respect to Rushmore is as follows:
(a) Rushmore Financial Services, Inc.
(b) 160 Summit Avenue
Montvale, New Jersey 07645
(c) Holding company of All-Tech Investment Group, Inc. and Domestic
Securities, Inc.
(d) No
(e) No
(f) New Jersey
Information with respect to Mr. Houtkin is set forth
below. Mr. Houtkin has previously filed a Report on Schedule 13D with
respect to the issuer; this joint filing constitutes Amendment No. 17
thereto.
Page 7 of 11
<PAGE>
(a) Harvey Houtkin
(b) c/o All-Tech Investment Group, Inc.
160 Summit Avenue
Montvale, New Jersey 07645
(c) Chairman of the Board and Chief Executive Officer, All-Tech
Investment Group, Inc. and President, Domestic Securities, Inc.,
registered broker-dealers, and Rushmore Financial Services, Inc.,
each located at 160 Summit Avenue, Montvale, NJ 07645
(d) No
(e) In 1990 a consent order was issued by the New Jersey Bureau of
Securities pursuant to a negotiated amicable resolution of the
application for registration of Domestic Securities, Inc.
("Domestic"), a registered broker-dealer, in the State of New
Jersey. The order provided that neither Domestic nor Mr. Houtkin
would reapply for registration for three years and the New Jersey
Bureau of Securities would be reimbursed $50,000 in respect of
its costs of investigation of the application. Mr. Houtkin and
Domestic are now registered in the State of New Jersey.
(f) United States
Information with respect to Sherry Houtkin is set forth below.
(a) Sherry Houtkin
(b) c/o All-Tech Investment Group, Inc.
160 Summit Avenue
Montvale, New Jersey 07645
(c) Unemployed
(d) No
(e) No
(f) United States
Information with respect to Mr. Shefts is set forth below. Mr. Shefts
has previously filed a Report on Schedule 13D with respect to the issuer; this
joint filing constitutes Amendment No. 17 thereto.
(a) Mark Shefts
(b) c/o All-Tech Investment Group, Inc.
160 Summit Avenue
Montvale, New Jersey 07645
(c) President/Treasurer All-Tech Investment Group, Inc., Vice
President/Secretary, Domestic Securities, Inc. and Rushmore
Financial Services, Inc., 160 Summit Avenue, Montvale, NJ 07645
(d) No
(e) No
(f) United States
Page 8 of 11
<PAGE>
Item 3. Source and Amount of Funds or Other Consideration.
Amounts set forth below are for shares owned directly by a reporting
person.
WC/OO All-Tech Investment Group, Inc., a registered broker/dealer
which makes a market in the issuer's stock,
was short 1,500 shares as of June 30, 1997. 90.5% of the stock of
All-Tech is owned by Rushmore.
Rushmore owns no shares of the issuer.
PF/WC/OO All 115,657 of the shares directly beneficially owned by Mr.
Houtkin individually were purchased for cash. Mr. Houtkin's adult son
Stuart Houtkin is the beneficial owner of 360 shares (0.0%) which were
purchased for cash. Mr. Houtkin's adult son Brad is the beneficial
owner of 13,430 shares (0.7%), 12,000 of which were purchased for cash
and 1,430 of which were purchased on margin. Mr. Houtkin's adult son
Michael is the beneficial owner of 2,200 shares, all of which were
purchased for cash. Mr. Houtkin's wife Sherry is the beneficial owner
of 128,489 shares (6.8%), all of which were purchased for cash. Mr.
Houtkin disclaims beneficial ownership of the shares owned by his wife
and his sons. Mr. Houtkin exercises control over 518 shares (0.0%)
owned by Solar Products, Sun-Tank, Inc., of which he is an officer and
director.
PF Mrs. Houtkin purchased 128,489 shares (6.8%) of the issuer for
cash. Mrs. Houtkin's husband, Harvey Houtkin, is the beneficial owner
of 116,175 shares of the issuer; her adult son Stuart is the
beneficial owner of 13,430 shares; her adult son Brad is the
beneficial owner of 13,430 shares; and her adult son Michael is the
beneficial owner of 2,200 shares, as described above. Mrs. Houtkin
disclaims beneficial ownership of all of the shares owned by her
husband and sons.
WC/OO Mr. Shefts exercises control over 518 shares owned by Solar
Products, Sun-Tank, Inc., of which he is an officer and director. Mr.
Shefts' wife, Wanda Shefts, owns 73,330 shares (3.9%); Mr. Shefts
disclaims beneficial ownership of the shares owned by his wife. All
of such shares were purchased for cash.
Page 9 of 11
<PAGE>
Item 4. Purpose of Transaction
The shares were purchased for investment purposes only, except for the
shares owned by All-Tech, which were purchased as inventory for its
market-making activity.
Except for All-Tech's continuing to make a market in the issuer's stock,
there are no current plans or proposals to acquire or dispose of the
issuer's securities or to seek any change in the issuer's business or
corporate structure.
Item 5. Interest in Securities of the Issuer
(a) The aggregate number of the issuer's common shares beneficially owned
at the close of business on June 30, 1997, by all reporting persons
submitting this joint filing (excluding the 218,327 shares (11.5%) as to
which beneficial ownership is disclaimed) equalled approximately 6.1% of
the common stock outstanding on such date.
All shares held in corporate name as set forth below are subject to shared
voting and dispositive power; shares owned by Mr. Houtkin individually are
subject to sole voting and dispositive power
(b) Shares beneficially owned by each reporting person:
All-Tech Investment Group, Inc. TOTAL: -1,500
PERCENTAGE: 0.0%
Rushmore Financial Services, Inc.
(excluding shares TOTAL: -1,500
of All-Tech) PERCENTAGE: 0.0%
Harvey Houtkin, individually 115,657
Harvey Houtkin as a control person of
Rushmore (excluding shares owned
by All-Tech) -0-
Harvey Houtkin as a control person of
All-Tech -0-
-------
TOTAL: 115,657
PERCENTAGE: 6.1%
Sherry Houtkin, individually TOTAL: 128,489
PERCENTAGE: 6.8%
Mark Shefts as a control person
of Rushmore -0-
Mark Shefts as a control person
of All-Tech -0-
-------
TOTAL: -0-
PERCENTAGE: -0-
Mr. Shefts disclaims beneficial ownership of 73,330 shares (3.9%)
owned by his wife, Wanda Shefts.
Page 10 of 11
<PAGE>
Mr. Houtkin disclaims beneficial ownership of 360 shares (0.0%) owned
by his adult son Stuart Houtkin; 2,200 shares (0.1%) owned by his
adult son Michael Houtkin, 13,430 shares (0.7%) owned by his adult son
Brad Houtkin; and 128,489 shares (6.8%) owned by his wife Sherry
Houtkin. The aggregate amount as to which beneficial ownership is
disclaimed is 218,327 shares (11.5%).
Mrs. Houtkin disclaims beneficial ownership of 360 shares (0.0%) owned
by her adult son Stuart Houtkin; 2,200 shares (0.1%) owned by her
adult son Michael Houtkin, 13,430 shares (0.7%) owned by her adult son
Brad Houtkin; and 116,175 shares (6.1%) owned by her husband Harvey
Houtkin. The aggregate amount as to which beneficial ownership is
disclaimed is 218,327 shares (6.9%).
(c) All-Tech, a market-maker in the issuer's stock, effects transactions
in the issuer's stock continually.
(d) N/A
(e) N/A
Item 6. Contracts, Arrangements, Understandings or Relationships with Respect
to Securities of the Issuer
The parties filing this Report on Form 13D have orally agreed to make
this joint filing.
Item 7. Material to be Filed as Exhibits
None
Page 10 of 11
<PAGE>
Signature
After reasonable inquiry and to the best of our knowledge and belief, we
certify that the information set forth in this statement is true, complete
and correct.
July 16, 1997 ALL-TECH INVESTMENT GROUP, INC.
By /s/Harvey Houtkin
-----------------------------
Harvey Houtkin, President
RUSHMORE FINANCIAL SERVICES, INC.
By /s/Harvey Houtkin
-----------------------------
Harvey Houtkin, President
/s/Harvey Houtkin
-------------------------------
Harvey Houtkin
/s/Mark Shefts
-------------------------------
Mark Shefts
/s/Sherry Houtkin
-------------------------------
Sherry Houtkin
Page 11 of 11
