Film transporting mechanism for cinematographic apparatus
Abstract
Abstract A FILM TRANSPORTING MECHANISM FOR USE IN A MOTION PICTURE PROJECTOR COMPRISES A SHAFT WHICH ROTATES THE SHUTTER AND FIRST AND SECOND AXIALLY MOVABLE ADVANCING CAMS WHICH RESPECTIVELY IMPART TO THE PULL-DOWN MOVEMENTS NECESSARY TO EFFECT FORWARD AND REARWARD TRANSPORT OF MOTION PICTURE FILM. THE CAMS ARE MOVABLE AXIALLY OF THE SHAFT BY A SHIFTER DEVICE SO THAT ONE THERE OF IMPARTS TO THE PULL DOWN MOVEMENT BY THE WAY OF A SUITABLE FOLLOWER. THE FACE OF THE SECOND CAM DIFFERS FROM THE FACE OF THE FIRST CAM TO THE EXTENT NECESSARY TO COMPENSATE FOR THE CLEARANCE WITH WHICH THE CLAW OF THE PULL-DOWN EXTENDS INTO THE PERFORATION OF MOTION PICTURE FILM. THIS INSURES THAT THE FRAMES OF SUCH FILM REGISTER ACCURATELY WITH THE GATE AND WITH THE OPTICAL SYSTEM NOT ONLY DURING FORWARD BUT ALSO DURING REARWARD TRANSPORT OF THE FILM.
Inventors
- 👤 Herbert Wilsch
- 👤 Hermann Muller
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |