SCHEDULE 13G
INFORMATION STATEMENT PURSUANT TO RULES 13d-1 AND 13d-2
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(Amendment No. )*
Tylan General, Inc.
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(Name of Issuer)
Common Stock
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(Title of Class of Securities)
902169 10 1
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(CUSIP Number)
*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)
Page 1 of 11
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CUSIP No. 902169101 13G Page 2 of 11 Pages
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1 NAME OF REPORTING PERSONS
S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS
Sigma Partners, a California Limited Partnership 77-0046357
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2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ]
(b) [X}
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3 SEC USE ONLY
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4 CITIZENSHIP OR PLACE OF ORGANIZATION
California
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NUMBER OF 5 SOLE VOTING POWER
SHARES 179,735
BENEFICIALLY ------- -------------------------------------------------------
OWNED BY EACH 6 SHARED VOTING POWER
REPORTING 0
PERSON ------- -------------------------------------------------------
WITH 7 SOLE DISPOSITIVE POWER
179,735
------- -------------------------------------------------------
8 SHARED DISPOSITIVE POWER
0
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9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
179,735
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10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
[ ]
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11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
2.283%
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12 TYPE OF REPORTING PERSON*
PN
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*SEE INSTRUCTIONS BEFORE FILLING OUT!
Page 2 of 11
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CUSIP No. 902169101 13G Page 3 of 11 Pages
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1 NAME OF REPORTING PERSONS
S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS
Sigma Associates, A California Limited Partnership 77-0093623
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2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ]
(b) [X}
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3 SEC USE ONLY
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4 CITIZENSHIP OR PLACE OF ORGANIZATION
California
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NUMBER OF 5 SOLE VOTING POWER
SHARES 13,365
BENEFICIALLY ------- -------------------------------------------------------
OWNED BY EACH 6 SHARED VOTING POWER
REPORTING 0
PERSON ------- -------------------------------------------------------
WITH 7 SOLE DISPOSITIVE POWER
13,365
------- -------------------------------------------------------
8 SHARED DISPOSITIVE POWER
0
- -------- -----------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
13,365
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10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
[ ]
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11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
.170%
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12 TYPE OF REPORTING PERSON*
PN
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*SEE INSTRUCTIONS BEFORE FILLING OUT!
Page 3 of 11
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CUSIP No. 902169101 13G Page 4 of 11 Pages
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1 NAME OF REPORTING PERSONS
S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS
Sigma Management, A California Limited Partnership 77-0042122
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2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ]
(b) [X}
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3 SEC USE ONLY
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4 CITIZENSHIP OR PLACE OF ORGANIZATION
California
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NUMBER OF 5 SOLE VOTING POWER
SHARES 193,100
BENEFICIALLY ------- -------------------------------------------------------
OWNED BY EACH 6 SHARED VOTING POWER
REPORTING 0
PERSON ------- -------------------------------------------------------
WITH 7 SOLE DISPOSITIVE POWER
193,100
------- -------------------------------------------------------
8 SHARED DISPOSITIVE POWER
0
- -------- -----------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
193,100
- -------- -----------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
[ ]
- -------- -----------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
2.453%
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12 TYPE OF REPORTING PERSON*
PN
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*SEE INSTRUCTIONS BEFORE FILLING OUT!
Page 4 of 11
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CUSIP No. 902169101 13G Page 5 of 11 Pages
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1 NAME OF REPORTING PERSONS
S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS
Sigma Partners II, L.P. 77-0211702
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2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ]
(b) [X}
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3 SEC USE ONLY
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4 CITIZENSHIP OR PLACE OF ORGANIZATION
California
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NUMBER OF 5 SOLE VOTING POWER
SHARES 319,337
BENEFICIALLY ------- -------------------------------------------------------
OWNED BY EACH 6 SHARED VOTING POWER
REPORTING 0
PERSON ------- -------------------------------------------------------
WITH 7 SOLE DISPOSITIVE POWER
319,337
------- -------------------------------------------------------
8 SHARED DISPOSITIVE POWER
0
- -------- -----------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
319,337
- -------- -----------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
[ ]
- -------- -----------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
4.05%
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12 TYPE OF REPORTING PERSON*
PN
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*SEE INSTRUCTIONS BEFORE FILLING OUT!
Page 5 of 11
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CUSIP No. 902169101 13G Page 6 of 11 Pages
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1 NAME OF REPORTING PERSONS
S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS
Sigma Associates II, L.P. 77-0211704
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2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ]
(b) [X}
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3 SEC USE ONLY
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4 CITIZENSHIP OR PLACE OF ORGANIZATION
California
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NUMBER OF 5 SOLE VOTING POWER
SHARES 19,304
BENEFICIALLY ------- -------------------------------------------------------
OWNED BY EACH 6 SHARED VOTING POWER
REPORTING 0
PERSON ------- -------------------------------------------------------
WITH 7 SOLE DISPOSITIVE POWER
19,304
------- -------------------------------------------------------
8 SHARED DISPOSITIVE POWER
0
- -------- -----------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
19,304
- -------- -----------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
[ ]
- -------- -----------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
.245%
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12 TYPE OF REPORTING PERSON*
PN
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*SEE INSTRUCTIONS BEFORE FILLING OUT!
Page 6 of 11
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CUSIP No. 902169101 13G Page 7 of 11 Pages
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1 NAME OF REPORTING PERSONS
S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS
Sigma Management II, L.P. 77-0211701
- -------- -----------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ]
(b) [X}
- -------- -----------------------------------------------------------------------
3 SEC USE ONLY
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4 CITIZENSHIP OR PLACE OF ORGANIZATION
California
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NUMBER OF 5 SOLE VOTING POWER
SHARES 338,641
BENEFICIALLY ------- -------------------------------------------------------
OWNED BY EACH 6 SHARED VOTING POWER
REPORTING 0
PERSON ------- -------------------------------------------------------
WITH 7 SOLE DISPOSITIVE POWER
338,641
------- -------------------------------------------------------
8 SHARED DISPOSITIVE POWER
0
- -------- -----------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
338,641
- -------- -----------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
[ ]
- -------- -----------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
4.30%
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12 TYPE OF REPORTING PERSON*
PN
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*SEE INSTRUCTIONS BEFORE FILLING OUT!
Page 7 of 11
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Item 1: Issuer
(a) Issuer: Tylan General, Inc.
(b) Address of Principal Office:
9577 Chesapeake Drive
San Diego, CA 92123
(c) Place of Organization:
Menlo Park, California
(d) Title of Class of Securities: Common Stock
(e) CUSIP No.: 98155G 10 1
Item 2: Filing Persons
Sigma Partners, A California Limited Partnership (SP)
Sigma Associates, A California Limited Partnership (SA)
Sigma Management, A California Limited Partnership (SM)
Sigma Partners II, L.P. (SP II)
Sigma Associates II, L.P. (SA II)
Sigma Management II, L.P. (SM II)
Page 8 of 11
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Item 3: N/A
<TABLE>
<CAPTION>
Item 4: Ownership SP SA SM SP II SA II SM II
<S> <C> <C> <C> <C> <C> <C>
(a) Beneficial Ownership 179,735 13,365 193,100 319,337 19,304 338,641
(b) Percentage of Class 2.283 .170 2.453 4.05 .245 4.30
(c) Sole Voting Power: 179,735 13,365 193,100 319,337 19,304 338,641
Shared Voting Power: 0 0 0 0 0 0
Sole Dispositive Power: 179,735 13,365 193,100 319,337 19,304 338,641
Shared Dispositive Power: 0 0 0 0 0 0
</TABLE>
In addition to the above, each of J. Burgess Jamieson, Gardner C.
Hendrie, Clifford L. Haas, C. Bradford Jeffries and Lawrence G. Finch, the five
general partners of Sigma Management, and each of Lawrence G. Finch, Clifford L.
Haas, Gardner C. Hendries, J. Burgess Jamieson, C. Bradford Jeffries and Wade
Woodson, the six general partners of Sigma Management II, L.P., may be deemed to
share voting and dispositive power over the 193,100 shares of Worldtalk
Corporation owned by Sigma Management and the 974,666 shares of Worldtalk
Corporation owned by Sigma Management II, L.P., respectively.
Item 5: Not Applicable
Item 6:
Under certain circumstances set forth in SP's, SM's, SA's, SP II's, SM II's, and
SA II's limited partnership agreements, the general partners and limited
partners of each of such funds have the right to receive dividends from, or the
proceeds from the sale of the common stock of Issuer owned by each such fund.
Item 7: Not Applicable
Item 8: Not Applicable
Item 9: Not Applicable
Item 10: Not Applicable
Exhibit A: Joint Filing Statement
Page 9 of 11
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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.
Date: February 10, 1997
SIGMA PARTNERS, A CALIFORNIA SIGMA PARTNERS II, L.P.
LIMITED PARTNERSHIP
By its General Partner, By its General Partner,
Sigma Management, A California Limited Sigma Management II, L.P.
Partnership
By:___________________________________ By:_________________________________
Clifford L. Haas, General Partner Clifford L. Haas, General Partner
SIGMA MANAGEMENT, A CALIFORNIA LIMITED SIGMA MANAGEMENT II, L.P.
PARTNERSHIP
By:___________________________________ By:_________________________________
Clifford L. Haas, General Partner Clifford L. Haas, General Partner
SIGMA ASSOCIATES, A CALIFORNIA LIMITED SIGMA ASSOCIATES II, L.P.
PARTNERSHIP
By:___________________________________ By:_________________________________
Clifford L. Haas, General Partner Clifford L. Haas, General Partner
Page 10 of 11
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EXHIBIT A
We, the undersigned, hereby express our agreement that the attached Schedule 13G
is filed on behalf of each of us.
DATE: February 10, 1997
SIGMA PARTNERS, A CALIFORNIA SIGMA PARTNERS II, L.P.
LIMITED PARTNERSHIP
By its General Partner, By its General Partner,
Sigma Management, A California Limited Sigma Management II, L.P.
Partnership
By:___________________________________ By:_________________________________
Clifford L. Haas, General Partner Clifford L. Haas, General Partner
SIGMA MANAGEMENT, A CALIFORNIA LIMITED SIGMA MANAGEMENT II, L.P.
PARTNERSHIP
By:___________________________________ By:_________________________________
Clifford L. Haas, General Partner Clifford L. Haas, General Partner
SIGMA ASSOCIATES, A CALIFORNIA LIMITED SIGMA ASSOCIATES II, L.P.
PARTNERSHIP
By:___________________________________ By:_________________________________
Clifford L. Haas, General Partner Clifford L. Haas, General Partner
Page 11 of 11
