Impact shutter having the tripping and shutter members in the flash circuit
Abstract
Abstract A PHOTOGRAPHIC CAMERA HAVING AN IMPACT SHUTTER MECHANISM INCLUDING A TRIPPING MEMBER, A SHUTTER AND A FLASH CIRCUIT IN WHICH BOTH THE TRIPPING MEMBER AND THE SHUTTER COMPRISE FLASH CONTACTS FOR CLOSING THE CIRCUIT A PREDETERMINED TIME PRIOR TO MAXIMUM SHUTTER OPENING. THE SPRINGS FOR OPERATING BOTH THE TRIPPING MEMBER AND THE SHUTTER COMPRISE ELECTRICAL CONDUCTORS IN THE FLASH CIRCUIT, AND THE CIRCUIT IS CLOSED WHEN THE TRIPPING MEMBER IS IN CONTACT WITH THE SHUTTER. BOTH MEMBERS ARE COATED WITH SILVER TO INSURE GOOD ELECTRICAL CONDUCTIVITY. ADDI- TIONAL CONDUCTORS ARE ALSO PROVIDED IN CERTAIN PORTIONS OF THE CIRCUIT. THE IMPACT SHUTTER MECHANISM ALSO INCLUDES A SHUTTER RELEASE MEMBER WHICH COACTS WITH A METERING PAWL TO PREVENT DOUBLE EXPOSURES AND LOCK THE FILM AGAINST FURTHER WINDING BEFORE EACH PICTURE IS TAKEN AFTER A PREDETERMINED AMOUNT OF UNEXPOSED FILM HAS BEEN SUITABLY FRAMED FOR THE NEXT PICTURE.
Inventors
- 👤 Venerio J Rigolini
- 👤 Dino A Liverano
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |