Patent US1877388A successfully refreshed from Google Patents.
Patent US3270650A successfully refreshed from Google Patents.
US3270650A
Expired / Lapsed
US
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Automatic exposure control system
Assignee: Eastman Kodak Co
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Filing: 1963-08-20
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Granted: 1966-09-06
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Expires: 1983-08-20
Abstract
No abstract record available.
Inventors
- 👤 Paul J Ernisse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:01
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/08; G03B7/081; G03B7/085; G03B7/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
IN A CAMERA HAVING A FILM-EXPOSING APERTURE, A MANUALLY OPERABLE CAMERA ACTUATING DEVICE, AND LIGHTSENSITIVE MEANS INCLUDING A PHOTO-RESPONSIVE CELL FOR PRODUCING AN OUTPUT VARYING IN ACCORDANCE WITH SCENE BRIGHTNESS, THE IMPROVEMENT COMPRISING: A DIAPHRAGM BLADE MEANS NORMALLY MAINTAINED IN A FIRST POSITION AND RELEASED FOR MOVEMENT IN ONE DIRECTION ONLY TOWARD A SECOND POSITION BY THE OPERATION OF SAID ACTUATING DEVICE, SAID BLADE MEANS HAVING THEREIN A PAIR OF ELONGATED SLITS OF CONTINUOUSLY VARYING WIDTH, SAID SLITS BEING POSITIONED, RESPECTIVELY, IN COVERING RELATION TO SAID APERTURE AND SAID PHOTO-RESPONSIVE CELL TO FORM PROPORTIONALLY VARY-
Claim 2
Dependent Claim
95 words
IN A CAMERA HAVING A FILM-EXPOSING APERTURE, A MANUALLY OPERABLE CAMERA ACTUATING DEVICE, AND LIGHTSENSITIVE MEANS INCLUDING A PHOTO-RESPONSIVE CELL FOR PRODUCING AN OUTPUT VARYING IN ACCORDANCE WITH SCENE BRIGHTNESS, THE IMPROVEMENT COMPRISING: A DIAPHRAGM BLADE MEANS NORMALLY MAINTAINED IN A FIRST POSITION AND RELEASED FOR MOVEMENT IN ONE DIRECTION ONLY TOWARD A SECOND POSITION BY THE OPERATION OF SAID ACTUATING DEVICE, SAID BLADE MEANS HAVING THEREIN A PAIR OF ELONGATED SLITS OF CONTINUOUSLY VARYING WIDTH, SAID SLITS BEING POSITIONED, RESPECTIVELY, IN COVERING RELATION TO SAID APERTURE AND SAID PHOTO-RESPONSIVE CELL TO FORM PROPORTIONALLY VARY-
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) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |