Shutter for photographic camera
Abstract
Abstract A SHUTTER MECHANISM FOR A PHOTOGRAPHIC CAMERA INCLUDES A PIVOTABLE IMPACT SHUTTER BLADE AND AN INERTIAL MASS PIVOTALLY MOUNTED ON THE SHUTTER BLADE FOR MOVEMENT THEREWITH AND FOR PIVOTAL MOVEMENT RELATIVE THERETO. FOR FAST SHUTTER SPEEDS BOTH THE SHUTTER BLADE AND THE INERTIAL MASS MOVE A CERTAIN DISTANCE LIMITED BY A STOP TO OPEN THE APERTURE AND THEN RETURN BY A SPRING BIAS TO THEIR CLOSING POSITIONS. FOR A SLOW SHUTTER SPEED THE SHUTTER BLADE OPENS THE SAME LIMITED DISTANCE BUT THE INERTIAL MASS IS PERMITTED TO CONTINUE ITS MOVEMENT ABOUT ITS PIVOT CONNECTION TO THE SHUTTER BLADE, HOLDING THE SHUTTER BLADE OPEN UNTIL THE INERTIAL MASS IS RETURNED TO ITS CLOSED POSITION BY THE SPRING BIAS.
Inventors
- 👤 Wolfgang Ort
Bibliographic Details
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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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |