Patent US2634102A successfully refreshed from Google Patents.
Patent US3264964A successfully refreshed from Google Patents.
US3264964A
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Single lens mirror reflex camera with exposure meter
Assignee: Zeiss Ikon AG
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Filing: 1963-09-11
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Granted: 1966-08-09
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Expires: 1983-09-11
Abstract
No abstract record available.
Inventors
- 👤 Ebertz Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:21
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/08; G03B7/099; G03B7/0993; G03B7/0997; G03B7/09971; G03B7/09976
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
IN A SINGLE OBJECTIVE LENS MIRROR REFLEX CAMERA PROVIDED WITH A PHOTO-ELECTRIC ELEMENT ADAPTED TO BE CONNECTED TO A PHOTO-ELECTRIC EXPOSURE METER IN WHICH THE ELEMENT IS ILLUMINATED BY A PORTION OF THE VIEWFINDER LIGHT BEAM AND AN OCULAR FOR SAID VIEWFINDER HAVING A VIEWING APERTURE, THE IMPROVEMENT COMPRISING A PARTLY TRANSMITTING MIRROR ARRANGED BETWEEN THE OCULAR OF THE VIEWFINDER AND THE VIEWING APERTURE OF THE SAME, SAID PARTLY TRANSMITTING MIRROR FORMING AN ANGLE OF SUBSTANTIALLY 45* WITH THE OPTICAL AXIS OF SAID VIEWFINDER AND DEFLECTING SAID PORTION OF THE VIEWFINDER LIGHT BEAM ONTO SAID PHOTOELECTRIC ELEMENT, THE OBJECTIVE AND OCULAR BEING POSITIONED SO THAT THE PROJECTION OF THE PUPIL OF SAID OBJECTIVE TAKES PLACE IN A PLANE CONJUGATE TO THE OCULAR PLANE, SAID PHOTOELECTRIC ELEMENT BEING ARRANGED IN SAID PROJECTED PLANE.
Claim 2
Dependent Claim
132 words
IN A SINGLE OBJECTIVE LENS MIRROR REFLEX CAMERA PROVIDED WITH A PHOTO-ELECTRIC ELEMENT ADAPTED TO BE CONNECTED TO A PHOTO-ELECTRIC EXPOSURE METER IN WHICH THE ELEMENT IS ILLUMINATED BY A PORTION OF THE VIEWFINDER LIGHT BEAM AND AN OCULAR FOR SAID VIEWFINDER HAVING A VIEWING APERTURE, THE IMPROVEMENT COMPRISING A PARTLY TRANSMITTING MIRROR ARRANGED BETWEEN THE OCULAR OF THE VIEWFINDER AND THE VIEWING APERTURE OF THE SAME, SAID PARTLY TRANSMITTING MIRROR FORMING AN ANGLE OF SUBSTANTIALLY 45* WITH THE OPTICAL AXIS OF SAID VIEWFINDER AND DEFLECTING SAID PORTION OF THE VIEWFINDER LIGHT BEAM ONTO SAID PHOTOELECTRIC ELEMENT, THE OBJECTIVE AND OCULAR BEING POSITIONED SO THAT THE PROJECTION OF THE PUPIL OF SAID OBJECTIVE TAKES PLACE IN A PLANE CONJUGATE TO THE OCULAR PLANE, SAID PHOTOELECTRIC ELEMENT BEING ARRANGED IN SAID PROJECTED PLANE.
References Cited (Backward Citations)
US3127809A
Cited
US3103150A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |