US3107594A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectric exposure control
Assignee: P Gossen and Co GmbH
•
Filing: 1959-03-12
•
Granted: 1963-10-22
•
Expires: 1979-03-12
Abstract
No abstract record available.
Inventors
- 👤 Falkenburg Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:48
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/08; G03B7/099; G03B7/0993
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
FOR USE WITH A CAMERA, AUTOMATIC PHOTOELECTRIC EXPOSURE APPARATUS COMPRISING AT LEAST TWO LIGHT-SENSITIVE CELLS, MEANS FOR CAUSING THE LIGHT FROM THE LIGHT ACCEPTOF SAID LIGHT-SENSITIVE CELLS TO DIFFER FROM THE LIGHT ACCEPTANCE ANGLE OF THE OTHER LIGHT-SENSITIVE CELL, AND MEANS FOR VARYING THE EXPOSURE OF THE FILM OF SAID CAMERA IN RESPONSE TO THE ELECTRICAL CURRENT THROUGH SAID CELLS, SAID LIGHT-SENSITIVE CELLS BEING SERIES CONNECTED WITH SAID MEANS FOR VARYING, ONE POLE OF ONE CELL BEING CONNECTED TO THE OPPOSITE POLE OF SAID OTHER CELL IN SAID SERIES CONNECTION SO THAT CURRENT IS FED TO SAID MEANS FOR VARYING IN INVERSE PROPORTION TO THE COMBINED IMPEDANCES OF SAID CELLS, WHEREBY THE EXPOSURE OF THE FILM IS INFLUENCED PRIMARILY BY THE LIGHT-SENSITIVE CELL RECEIVING THE LEAST AMOUNT OF LIGHT.
Claim 2
Dependent Claim
129 words
FOR USE WITH A CAMERA, AUTOMATIC PHOTOELECTRIC EXPOSURE APPARATUS COMPRISING AT LEAST TWO LIGHT-SENSITIVE CELLS, MEANS FOR CAUSING THE LIGHT FROM THE LIGHT ACCEPTOF SAID LIGHT-SENSITIVE CELLS TO DIFFER FROM THE LIGHT ACCEPTANCE ANGLE OF THE OTHER LIGHT-SENSITIVE CELL, AND MEANS FOR VARYING THE EXPOSURE OF THE FILM OF SAID CAMERA IN RESPONSE TO THE ELECTRICAL CURRENT THROUGH SAID CELLS, SAID LIGHT-SENSITIVE CELLS BEING SERIES CONNECTED WITH SAID MEANS FOR VARYING, ONE POLE OF ONE CELL BEING CONNECTED TO THE OPPOSITE POLE OF SAID OTHER CELL IN SAID SERIES CONNECTION SO THAT CURRENT IS FED TO SAID MEANS FOR VARYING IN INVERSE PROPORTION TO THE COMBINED IMPEDANCES OF SAID CELLS, WHEREBY THE EXPOSURE OF THE FILM IS INFLUENCED PRIMARILY BY THE LIGHT-SENSITIVE CELL RECEIVING THE LEAST AMOUNT OF LIGHT.
References Cited (Backward Citations)
US2378433A
Cited
US2446628A
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US2573729A
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US2630735A
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US2879690A
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US2776364A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-10-21 | 1967-04-22 | 1967-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-21 | 1971-04-22 | 1971-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-21 | 1975-04-22 | 1975-10-22 | $7700.00 | Window Closed / Lapsed |