Patent US5172243A successfully refreshed from Google Patents.
Patent US3701595A successfully refreshed from Google Patents.
US3701595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motion picture projector
Assignee: Bell and Howell Co
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Filing: 1971-01-28
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Granted: 1972-10-31
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Expires: 1991-01-28
Abstract
Abstract POSITIONS TO ITS ACTIVE POSITIONS DURING THREADING AND REWIND. THE SOLENOID COIL IS SLIDABLY MOUNTED SO THAT WHEN ENERGIZED IT ACTIVATES ANOTHER LINKAGE TO OPEN UP THE FILM PATH DURING THREADING AND REWIND. A MOTION PICTURE PROJECTOR WITH MEANS FOR AUTOMATICALLY THREADING A FILMSTRIP THROUGH THE GATE TO A TAKE-UP REEL AND FOR REWINDING THE FILMSTRIP AFTER PROJECTION. A ROLLER ACTS AGAINST THE OUTSIDE CONVOLUTION OF THE FILM UPON THE REEL DURING THE THREADING PHASE AND UPON THE REEL ITSELF DURING THE REWINDING PHASE. A SOLENOID THROUH ITS PLUMGER AND A LINKAGE SHIFTS THE ROLLER FROM ITS INACTIVE
Inventors
- 👤 Jack W Thomsen
- 👤 Arthur E Nupnau
- 👤 Raymond W H Kim
- 👤 Jaroslav Cherniavskyj
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:37
CPC Classifications
G; G03; G03B; G03B1/00; G03B1/42; G03B1/48; G03B1/50; G03B19/00; G03B19/18
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) | 1975-10-31 | 1976-05-01 | 1976-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-31 | 1980-05-01 | 1980-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-31 | 1984-05-01 | 1984-10-31 | $7700.00 | Window Closed / Lapsed |