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US3671113A
Expired / Lapsed
US
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Film feeding mechanism for motion picture projectors
Assignee: Eastman Kodak Co
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Filing: 1971-03-15
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Granted: 1972-06-20
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Expires: 1991-03-15
Abstract
Abstract IN A FILM FEEDING MECHANISM OF THE TYPE WHEREIN THE ENGAGEMENT OF THE FILM CLAW IS EFFECTED BY A CAM FOLLOWING COOPERATING WITH A CONSTANT SPEED CAM, THE CAM IS FORMED WITH A "STILL" PROJECTION SURFACE AND A "MOTION" PROJECTION SURFACE. THE FOLLOWER IS LOCATABLE IN EITHER SURFACE TO ESTABLISH STILL PROJECTION AND MOTION PROJECTION AT A SET RATE, AND SLOWER PROJECTION RATES ARE ACHIEVED BY AN ELECTRICALLY ACTUABLE DEVICE WHICH MOVES THE FOLLOWER FROM THE "STILL" PROJECTION SURFACE TO THE "MOTION" PROJECTION SURFACE AT SELECTED FREQUENCIES.
Inventors
- 👤 Robert B Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:51
CPC Classifications
G; G03; G03B; G03B1/00; G03B1/18; G03B1/20; G03B1/22; G03B21/00; G03B21/14; G03B21/32; G03B21/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |