US3871005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic exposure control means for a camera
Assignee: Konica Minolta Inc
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Filing: 1972-11-14
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Granted: 1975-03-11
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Expires: 1992-11-14
Abstract
Abstract Automatic exposure time control circuit for a camera having coarse exposure adjusting means that can be moved from a fully opened to a preset aperture setting upon operation of the camera release and fine exposure adjusting means that measures the light passing through the preset aperture of the lens and determines the actual exposure time in response to the light measured.
Inventors
- 👤 Yasuo Uchida
- 👤 Yoshitaka Kuroyanagi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:35
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/08; G03B7/081; G03B7/083; G03B7/087
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
100 words
An automatic exposure control means for a camera comprising first exposure adjusting means having a diaphragm which is preset and moved from a full opened state to a reduced state upon camera release operation, said first exposure adjusting means comprising a first light measuring member and means responsive to the output from said first light measuring member for presetting the aperture value, second exposure adjusting means comprising a second light measuring member for receiving light which has passed through the reduced aperture and means for determining an exposure time in response to the output from said second light measuring member.
Claim 2
Dependent Claim
100 words
An automatic exposure control means for a camera comprising first exposure adjusting means having a diaphragm which is preset and moved from a full opened state to a reduced state upon camera release operation, said first exposure adjusting means comprising a first light measuring member and means responsive to the output from said first light measuring member for presetting the aperture value, second exposure adjusting means comprising a second light measuring member for receiving light which has passed through the reduced aperture and means for determining an exposure time in response to the output from said second light measuring member.
Claim 3
Dependent Claim
100 words
An automatic exposure control means for a camera comprising first exposure adjusting means having a diaphragm which is preset and moved from a full opened state to a reduced state upon camera release operation, said first exposure adjusting means comprising a first light measuring member and means responsive to the output from said first light measuring member for presetting the aperture value, second exposure adjusting means comprising a second light measuring member for receiving light which has passed through the reduced aperture and means for determining an exposure time in response to the output from said second light measuring member.
Claim 4
Dependent Claim
100 words
An automatic exposure control means for a camera comprising first exposure adjusting means having a diaphragm which is preset and moved from a full opened state to a reduced state upon camera release operation, said first exposure adjusting means comprising a first light measuring member and means responsive to the output from said first light measuring member for presetting the aperture value, second exposure adjusting means comprising a second light measuring member for receiving light which has passed through the reduced aperture and means for determining an exposure time in response to the output from said second light measuring member.
Claim 5
Dependent Claim
30 words
An automatic exposure control means for a camera according to claim 1, wherein said second exposure determining means comprises means for memorizing the output from said second light, measuring member.
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) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |