US3171006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reversible control switch for a slide projector having a slide position indicator
Assignee: Ernst Leitz Wetzlar GmbH
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Filing: 1961-09-21
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Granted: 1965-02-23
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Expires: 1981-09-21
Abstract
No abstract record available.
Inventors
- 👤 Mulch Hans
- 👤 Jung Walter
- 👤 Lussem Heribert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:47
CPC Classifications
G; G03; G03B; G03B23/00; G06; G06M; G06M1/00; G06M1/04; G06M1/041; H; H01; H01H; H01H19/00; H01H19/001; H01H19/54; H01H19/60; H01H19/62; H01H9/00; H01H9/02; H01H9/0214; H01H9/16; H01H9/165
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A REMOTELY LOCATED CONTROL SWITCH FOR SLIDE PROJECTORS COMPRISING: A CASING, A GEARED COUNTER HAVING A SCALE DISC IN SAID CASING, SWITCHING MEANS MOUNTED IN SAID CASING AND OPERABLE FROM THE EXTERIOR THEREOF TO ENERGIZE A CIRCUIT FOR ACTUACTING A SLIDE CHANGING MECHANISM, SAID SWITCHING MEANS HAVING A FIRST AND SECOND SPRING BIASED PAWL ENGAGING SAID GEARED COUNTED AND A CAM SURFACE IN SAID CASING ENGAGING SAID PAWLS SO THAT SAID GEARED COUNTER IS ROTATED ONE STEP FOR EACH ACUATATION OF SAID SWITCH MEMBER, SAID SCALE DISC HAVING A SERIES OF NUMERALS CORRESPONDING TO A SERIES OF SLIDES TO BE PROJECTED, AND A VIEWING ONE OF SAID CASING OPPOSITE SAID SCALE DISC VIEWING ONE OF SAID NUMERALS TO DETERMINED HOW MANY STEPS SAID COUNTER IS SEPARATED FROM A REFERENCE POSITION.
Claim 2
Dependent Claim
130 words
A REMOTELY LOCATED CONTROL SWITCH FOR SLIDE PROJECTORS COMPRISING: A CASING, A GEARED COUNTER HAVING A SCALE DISC IN SAID CASING, SWITCHING MEANS MOUNTED IN SAID CASING AND OPERABLE FROM THE EXTERIOR THEREOF TO ENERGIZE A CIRCUIT FOR ACTUACTING A SLIDE CHANGING MECHANISM, SAID SWITCHING MEANS HAVING A FIRST AND SECOND SPRING BIASED PAWL ENGAGING SAID GEARED COUNTED AND A CAM SURFACE IN SAID CASING ENGAGING SAID PAWLS SO THAT SAID GEARED COUNTER IS ROTATED ONE STEP FOR EACH ACUATATION OF SAID SWITCH MEMBER, SAID SCALE DISC HAVING A SERIES OF NUMERALS CORRESPONDING TO A SERIES OF SLIDES TO BE PROJECTED, AND A VIEWING ONE OF SAID CASING OPPOSITE SAID SCALE DISC VIEWING ONE OF SAID NUMERALS TO DETERMINED HOW MANY STEPS SAID COUNTER IS SEPARATED FROM A REFERENCE POSITION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |