US3277803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic exposure adjusting device for cine cameras
Assignee: Nikon Corp
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Filing: 1964-03-04
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Granted: 1966-10-11
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Expires: 1984-03-04
Abstract
No abstract record available.
Inventors
- 👤 Fukuoka Shigetada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:01
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/08; G03B7/081; G03B7/085
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
AN AUTOMATIC EXPOSURE ADJUSTING DEVICE FOR MOTION PICTURE CAMERAS HAVING A SHUTTER MECHANISM AND FILM TRANSPORT MECHANISM INCLUDING A GALVANOMETER HAVING A MOVING ROTATABLE COIL, A PHOTOELECTRIC RESISTOR ON WHICH INCIDENT LIGHT RAYS ARE ADAPTED TO IMPINGE, A PRIME MOVER FOR DRIVING THE SHUTTER MECHANISM AND THE FILM TRANSPORT MECHANISM, AND AN AUTOMATIC EXPOSURE ADJUSTING CIRCUIT, IN WHICH AN A.C. GENERATOR IS CONNECTED TO AND DRIVEN BY THE PRIME MOVER, A PORTION OF THE OUTPUT OF THE A.C. GENERATOR BEING RECTIFIED AND APPLIED TO ACTUATE THE GALVANOMETER COIL, THE REMAINING PORTION OF THE A.C. OUTPUT OF THE GENERATOR BEING OVERLAPPINGLY APPLIED TO THE GALVANOMETER CIRCUIT TO SUBJECT THE GALVANOMETER TO A VIBRATING TORQUE.
Claim 2
Dependent Claim
113 words
AN AUTOMATIC EXPOSURE ADJUSTING DEVICE FOR MOTION PICTURE CAMERAS HAVING A SHUTTER MECHANISM AND FILM TRANSPORT MECHANISM INCLUDING A GALVANOMETER HAVING A MOVING ROTATABLE COIL, A PHOTOELECTRIC RESISTOR ON WHICH INCIDENT LIGHT RAYS ARE ADAPTED TO IMPINGE, A PRIME MOVER FOR DRIVING THE SHUTTER MECHANISM AND THE FILM TRANSPORT MECHANISM, AND AN AUTOMATIC EXPOSURE ADJUSTING CIRCUIT, IN WHICH AN A.C. GENERATOR IS CONNECTED TO AND DRIVEN BY THE PRIME MOVER, A PORTION OF THE OUTPUT OF THE A.C. GENERATOR BEING RECTIFIED AND APPLIED TO ACTUATE THE GALVANOMETER COIL, THE REMAINING PORTION OF THE A.C. OUTPUT OF THE GENERATOR BEING OVERLAPPINGLY APPLIED TO THE GALVANOMETER CIRCUIT TO SUBJECT THE GALVANOMETER TO A VIBRATING TORQUE.
References Cited (Backward Citations)
US2914712A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |