Patent US3170369A successfully refreshed from Google Patents.
US3170369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slide projector
Assignee: Individual
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Filing: 1962-07-18
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Granted: 1965-02-23
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Expires: 1982-07-18
Abstract
No abstract record available.
Inventors
- 👤 Gerald J Frey
- 👤 Clinton W Hough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:20
CPC Classifications
G; G03; G03B; G03B23/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
221 words
IN A PROJECTOR FOR USE WITH BOUND IMAGE BEARING TRANSPARENCY SLIDES, THE COMBINATION OF: A HOUSING INCLUDING A BASE PORTION, SUPPORTING STRUCTURE AND OUTER COVER; AN OPTICAL SYSTEM DISPOSED IN SAID HOUSING AND HAVING A SPACE BETWEEN ELEMENTS THEREOF TO DEFINE A PROJECTION GATE; AN ILLUMINATING SYSTEM DISPOSED IN SAID HOUSING AND POSITIONED FOR COOPERATING WITH SAID OPTICAL SYSTEM: A GENERALLY RECTANGULAR CARTRIDGE REMOVABLY POSITIONED IN SAID HOUSING AND EXTENDING PARTIALLY THEREFROM, SAID CARTRIDGE INCLUDING A PAIR OF SPACED SHAFTS; AN ENDLESS BELT POSITIONED ABOUT SAID SPACED SHAFTS, SAID BELT HAVING A PLURALITY OF ADJACENTLY DISPOSED CLIPS FOR INDIVIDUALLY SUPPORTING AND RETAINING INDIVIDUAL SLIDES, PLANE EXTENDING THROUGH AXES OF SAID SHAFTS BEING IN ALIGNMENT WITH SAID PROJECTION GATE; A DRIVING MECHANISM CARRIED BY SAID BASE AND REMOVABLY OPERATIVELY COUPLED TO AT LEAST ONE OF SAID SHAFTS TO IMPART ANGULAR MOVEMENT THERETO SUFFICIENT SEQUENTIALLY TO DISPOSE EACH OF SAID SLIDES INDIVIDUALLY IN SAID PROJECTION GATE; MEANS FORMING A PORTION OF SAID COUPLING OF SAID DRIVING MECHANISM FOR PERMITTING EACH OF SAID SLIDES TO REMAIN IN SAID PROJECTION GATE FOR A FINITE PREDETERMINED PERIOD OF TIME; MEANS ENGAGEABLE WITH EACH SLIDE IN SAID PROJECTION GATE FOR ALIGNING SAID SLIDE THERIN; AND CIRCUIT MEANS FOR ENERGIZING SAID ILLUMINATING SYSTEM AND SAID SLIDE ALIGNING MEANS ONLY WHEN A SLIDE IS POSITIONED WITHIN SAID PROJECTION GATE.
Claim 2
Dependent Claim
221 words
IN A PROJECTOR FOR USE WITH BOUND IMAGE BEARING TRANSPARENCY SLIDES, THE COMBINATION OF: A HOUSING INCLUDING A BASE PORTION, SUPPORTING STRUCTURE AND OUTER COVER; AN OPTICAL SYSTEM DISPOSED IN SAID HOUSING AND HAVING A SPACE BETWEEN ELEMENTS THEREOF TO DEFINE A PROJECTION GATE; AN ILLUMINATING SYSTEM DISPOSED IN SAID HOUSING AND POSITIONED FOR COOPERATING WITH SAID OPTICAL SYSTEM: A GENERALLY RECTANGULAR CARTRIDGE REMOVABLY POSITIONED IN SAID HOUSING AND EXTENDING PARTIALLY THEREFROM, SAID CARTRIDGE INCLUDING A PAIR OF SPACED SHAFTS; AN ENDLESS BELT POSITIONED ABOUT SAID SPACED SHAFTS, SAID BELT HAVING A PLURALITY OF ADJACENTLY DISPOSED CLIPS FOR INDIVIDUALLY SUPPORTING AND RETAINING INDIVIDUAL SLIDES, PLANE EXTENDING THROUGH AXES OF SAID SHAFTS BEING IN ALIGNMENT WITH SAID PROJECTION GATE; A DRIVING MECHANISM CARRIED BY SAID BASE AND REMOVABLY OPERATIVELY COUPLED TO AT LEAST ONE OF SAID SHAFTS TO IMPART ANGULAR MOVEMENT THERETO SUFFICIENT SEQUENTIALLY TO DISPOSE EACH OF SAID SLIDES INDIVIDUALLY IN SAID PROJECTION GATE; MEANS FORMING A PORTION OF SAID COUPLING OF SAID DRIVING MECHANISM FOR PERMITTING EACH OF SAID SLIDES TO REMAIN IN SAID PROJECTION GATE FOR A FINITE PREDETERMINED PERIOD OF TIME; MEANS ENGAGEABLE WITH EACH SLIDE IN SAID PROJECTION GATE FOR ALIGNING SAID SLIDE THERIN; AND CIRCUIT MEANS FOR ENERGIZING SAID ILLUMINATING SYSTEM AND SAID SLIDE ALIGNING MEANS ONLY WHEN A SLIDE IS POSITIONED WITHIN SAID PROJECTION GATE.
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 |