Switch apparatus for a film projector
Abstract
Abstract A FILM PROJECTOR, PARTICULARLY ONE PROVIDED WITH A FILM CARTRIDGE INSERTABLE IN THE PROJECTOR HOUSING IS EQUIPPED WITH A SWITCH APPARATUS HAVING A SINGLE CENTRAL ROTATABLE CONTROL MEMBER FOR CONTROLLING ALL OF THE OPERATIVE FUNCTIONS OF THE PROJECTOR, SUCH AS DRIVING THE FILM FEED REEL, THE FILM TAKE-UP REEL, CONTROLLING THE DRIVE MOTOR, THE FILM THREADING MECHANISM, THE FILM ADVANCING MECHANISM, THE SHUTTER MECHANISM AND THE FORWARD AND RETURN MOVEMENT OF THE FILM. THIS IS ACCOMPLISHED BY A CAM DISC HAVING SEVERAL CAMS MOUNTED ON THE CENTRAL ROTABLE CONTROL MEMBER. EACH CAM CONTROLS A PARTICULAR LEVER MECHANISM, EACH OF WHICH PERFORMS IN THE REQUIRED SEQUENCE ONE PARTICULAR OPERATIVE FUNCTION OF THE PROJECTOR.
Inventors
- 👤 Fritz Krumbein
- 👤 Dietrich Becker
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |