US3296727A
Expired / Lapsed
US
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Assignee: Decision Systems Inc
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Filing: 1964-10-09
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Granted: 1967-01-10
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Expires: 1984-10-09
Abstract
No abstract record available.
Inventors
- 👤 Stephen A Liguori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:38
CPC Classifications
G; G03; G03B; G03B23/00; G03B23/02; G03B23/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
IN A SLIDE PROJECTOR HAVING A MOVABLE SLIDE TRAY WITH SLOTS FOR SLIDES AND AN AUTOMATIC SLIDE CHANGING MECHANISM, THE IMPROVEMENT COMPRISING: MEANS TO MOVE SAID TRAY, PULSE MEANS TO GENERATE A PULSE SIGNAL EACH TIME ONE OF SAID SLOTS MOVES PAST A PREDETERMINED POSITION, COUNTING MEANS RESPONSIVE TO SAID PULSE SIGNAL TO PROVIDE AN INDICATION OF THE POSITION OF SAID TRAY, MANUALLY OPERABLE SELECTION MEANS TO PROVIDE THE DESIGNATION OF A DESIRED POSITION OF SAID TRAY, CONTROL MEANS RESPONSIVE TO SAID INDICATION OF SAID COUNTING MEANS AND RESPONSIVE TO SAID DESIGNATION OF SAID SELECTION MEANS TO BRAKE SAID TRAY AND ACTUATE SAID AUTOMATIC SLIDE CHANGING MECHANISM WHEN SAID INDICATION OF SAID COUNTING MEANS COINCIDES WITH SAID DESIGNATION OF SAID SELECTION MEANS.
Claim 2
Dependent Claim
122 words
IN A SLIDE PROJECTOR HAVING A MOVABLE SLIDE TRAY WITH SLOTS FOR SLIDES AND AN AUTOMATIC SLIDE CHANGING MECHANISM, THE IMPROVEMENT COMPRISING: MEANS TO MOVE SAID TRAY, PULSE MEANS TO GENERATE A PULSE SIGNAL EACH TIME ONE OF SAID SLOTS MOVES PAST A PREDETERMINED POSITION, COUNTING MEANS RESPONSIVE TO SAID PULSE SIGNAL TO PROVIDE AN INDICATION OF THE POSITION OF SAID TRAY, MANUALLY OPERABLE SELECTION MEANS TO PROVIDE THE DESIGNATION OF A DESIRED POSITION OF SAID TRAY, CONTROL MEANS RESPONSIVE TO SAID INDICATION OF SAID COUNTING MEANS AND RESPONSIVE TO SAID DESIGNATION OF SAID SELECTION MEANS TO BRAKE SAID TRAY AND ACTUATE SAID AUTOMATIC SLIDE CHANGING MECHANISM WHEN SAID INDICATION OF SAID COUNTING MEANS COINCIDES WITH SAID DESIGNATION OF SAID SELECTION MEANS.
References Cited (Backward Citations)
US3225652A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |