US3143046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Camera exposure control
Assignee: FLIGHT RES Inc
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Filing: 1962-05-08
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Granted: 1964-08-04
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Expires: 1982-05-08
Abstract
No abstract record available.
Inventors
- 👤 John C Pennock
- 👤 Jr Charles A Gregory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:00
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/08; G03B7/081; G03B7/087
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
IN A CAMERA, THE METHOD OF REGULATING AN EXPOSURE CONTROL DEVICE SO THAT THE INTENSITY OF LIGHT INCIDENT UPON THE FILM TENDS TO REMAIN CONSTANT, COMPRISING: (A) CAUSING THE ENTRANT LIGHT TO BE REFLECTED FROM THE CAMERA SHUTTER WHEN THE SHUTTER IS CLOSED; (B) COMPARING SAID REFLECTED ENTRANT LIGHT WITH A REFERENCE RADIATION OF PRESELECTED CONSTANT VALUE; (C) DEVELOPING FROM SAID COMPARISON A SIGNAL WHICH IS A FUNCTION OF THE VARIATION OF THE INTENSITY OF SAID REFLECTED ENTRANT LIGHT FROM THAT OF SAID REFERENCE RADIATION; AND (D) USING SAID SIGNAL TO ADJUST THE EXPOSURE TIME CONTROL DEVICE OF THE CAMERA IN THE DIRECTION INDICATED
Claim 2
Dependent Claim
104 words
IN A CAMERA, THE METHOD OF REGULATING AN EXPOSURE CONTROL DEVICE SO THAT THE INTENSITY OF LIGHT INCIDENT UPON THE FILM TENDS TO REMAIN CONSTANT, COMPRISING: (A) CAUSING THE ENTRANT LIGHT TO BE REFLECTED FROM THE CAMERA SHUTTER WHEN THE SHUTTER IS CLOSED; (B) COMPARING SAID REFLECTED ENTRANT LIGHT WITH A REFERENCE RADIATION OF PRESELECTED CONSTANT VALUE; (C) DEVELOPING FROM SAID COMPARISON A SIGNAL WHICH IS A FUNCTION OF THE VARIATION OF THE INTENSITY OF SAID REFLECTED ENTRANT LIGHT FROM THAT OF SAID REFERENCE RADIATION; AND (D) USING SAID SIGNAL TO ADJUST THE EXPOSURE TIME CONTROL DEVICE OF THE CAMERA IN THE DIRECTION INDICATED
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-04 | 1968-02-03 | 1968-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-04 | 1972-02-03 | 1972-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-04 | 1976-02-03 | 1976-08-04 | $7700.00 | Window Closed / Lapsed |