US3085486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic camera having an automatic exposure control device
Assignee: Bell and Howell Co
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Filing: 1959-03-02
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Granted: 1963-04-16
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Expires: 1979-03-02
Abstract
No abstract record available.
Inventors
- 👤 Stephen F Bushman
- 👤 Suigussaar Vello
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:44
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/08; G03B7/081; G03B7/085
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
IN A PHOTOGRAPHIC CAMERA, ADJUSTABLE EXPOSURE CONTROL MEANS, A GALVANOMETER FOR ADJUSTING THE EXPOSURE CONTROL MEANS, A PHOTOELECTRIC CELL RESPONSIVE TO LIGHT EXTERIOR OF THE CAMERA AND SERIALLY CONNECTED TO THE GALVANOMETER FOR ENERGIZING THE GALVANOMETER, TEMPERATURE-COMPENSATING RESISTANCE MEANS IN CIRCUIT WITH THE GALVANOMETER, SECOND RESISTANCE MEANS SHUNTING THE GALVANOMETER, THIRD RESISTANCE MEANS SERIALLY CONNECTING THE PHOTOELECTRIC CELL TO THE SECOND RESISTANCE MEANS AND THE GALVANOMETER, AND MANUALLY OPERABLE MEANS FOR SIMULTANEOUSLY VARYING THE RESISTANCE OF THE SECOND AND THIRD RESISTANCE MEANS TO SHIFT THE RANGE OF THE GALVANOMETER.
Claim 2
Dependent Claim
89 words
IN A PHOTOGRAPHIC CAMERA, ADJUSTABLE EXPOSURE CONTROL MEANS, A GALVANOMETER FOR ADJUSTING THE EXPOSURE CONTROL MEANS, A PHOTOELECTRIC CELL RESPONSIVE TO LIGHT EXTERIOR OF THE CAMERA AND SERIALLY CONNECTED TO THE GALVANOMETER FOR ENERGIZING THE GALVANOMETER, TEMPERATURE-COMPENSATING RESISTANCE MEANS IN CIRCUIT WITH THE GALVANOMETER, SECOND RESISTANCE MEANS SHUNTING THE GALVANOMETER, THIRD RESISTANCE MEANS SERIALLY CONNECTING THE PHOTOELECTRIC CELL TO THE SECOND RESISTANCE MEANS AND THE GALVANOMETER, AND MANUALLY OPERABLE MEANS FOR SIMULTANEOUSLY VARYING THE RESISTANCE OF THE SECOND AND THIRD RESISTANCE MEANS TO SHIFT THE RANGE OF THE GALVANOMETER.
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) | 1966-04-15 | 1966-10-15 | 1967-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-15 | 1970-10-15 | 1971-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-15 | 1974-10-15 | 1975-04-16 | $7700.00 | Window Closed / Lapsed |