US3093044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Built-in exposure metering arrangement for a single lens reflex camera
Assignee: Agfa Gevaert NV
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Filing: 1962-03-20
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Granted: 1963-06-11
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Expires: 1982-03-20
Abstract
No abstract record available.
Inventors
- 👤 Lederer Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:38
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/08; G03B7/099; G03B7/0993; G03B7/0997; G03B7/09971; G03B7/09972
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
222 words
A BUILT-IN EXPOSURE METERING ARRANGEMENT FOR A SINGLE LENS REFLEX CAMERA HAVING AN OPTICAL AXIS EXTENDING THROUGH ITS OBJECTIVE LENS AND FILM APERTURE AND A VIEWFINDER WITH ITS OPTICAL AXIS INTERSECTING SAID OPTICAL AXIS OF SAID CAMERA AT THE DEFLECTING MIRROR WHICH MOVES CLEAR OF THE EXPOSURE AREA OF THE CAMERA DURING AN EXPOSURE, SAID ARRANGEMENT COMPRISING AT LEAST A PORTION OF SAID MIRROR BEING SEMITRANSPARENT, A SEALING PLATE MOVABLY MOUNTED IN SAID CAMERA BETWEEN SAID DEFLECTING MIRROR AND SAID FILM APERTURE, A PHOTOTRANSDUCING ELEMENT, ROTATABLE MEANS MOUNTING SAID SEALING PLATE AND SAID DEFLECTING MIRROR TOGETHER AT ONE END THEREOF TO FORM AN ANGULARLY ASSOCIATED ASSEMBLY, SAID VIEWFINDER HAVING A BASE WHICH FORMS A LIMIT OF TRAVEL FOR SAID ASSEMBLY WHEN IT IS MOVED CLEAR OF SAID EXPOSURE AREA, A MIRROR STOP IN SAID CAMERA MAINTAINING SAID DEFLECTING MIRROR IN A POSITION FOR REFLECTING IMAGES THROUGH SAID VIEWFINDER, A SEALING STOP DISPOSED IN FRONT OF SAID FILM APERTURE FOR MAINTAINING SAID SEALING PLATE IN ITS SEALING POSITION AT A SPACED ANGLE FROM SAID MIRROR IN SAID REFLECTING POSITION, PIVOT MEANS MOUNTING SAID PHOTOTRANSDUCING ELEMENT UPON SAID ASSEMBLY BETWEEN SAID MIRROR AND SAID SEALING PLATE AND DISPOSED IN LINE WITH SAID SEMITRANSPARENT PORTION OF SAID DEFLECTING MIRROR, MUTUALLY ENGAGING MEANS UPON SAID PHOTOTRANSDUCING ELEMENT AND SAID MIRROR AND SEALING PLATE ASSEMBLY FOR MAINTAINING
Claim 2
Dependent Claim
222 words
A BUILT-IN EXPOSURE METERING ARRANGEMENT FOR A SINGLE LENS REFLEX CAMERA HAVING AN OPTICAL AXIS EXTENDING THROUGH ITS OBJECTIVE LENS AND FILM APERTURE AND A VIEWFINDER WITH ITS OPTICAL AXIS INTERSECTING SAID OPTICAL AXIS OF SAID CAMERA AT THE DEFLECTING MIRROR WHICH MOVES CLEAR OF THE EXPOSURE AREA OF THE CAMERA DURING AN EXPOSURE, SAID ARRANGEMENT COMPRISING AT LEAST A PORTION OF SAID MIRROR BEING SEMITRANSPARENT, A SEALING PLATE MOVABLY MOUNTED IN SAID CAMERA BETWEEN SAID DEFLECTING MIRROR AND SAID FILM APERTURE, A PHOTOTRANSDUCING ELEMENT, ROTATABLE MEANS MOUNTING SAID SEALING PLATE AND SAID DEFLECTING MIRROR TOGETHER AT ONE END THEREOF TO FORM AN ANGULARLY ASSOCIATED ASSEMBLY, SAID VIEWFINDER HAVING A BASE WHICH FORMS A LIMIT OF TRAVEL FOR SAID ASSEMBLY WHEN IT IS MOVED CLEAR OF SAID EXPOSURE AREA, A MIRROR STOP IN SAID CAMERA MAINTAINING SAID DEFLECTING MIRROR IN A POSITION FOR REFLECTING IMAGES THROUGH SAID VIEWFINDER, A SEALING STOP DISPOSED IN FRONT OF SAID FILM APERTURE FOR MAINTAINING SAID SEALING PLATE IN ITS SEALING POSITION AT A SPACED ANGLE FROM SAID MIRROR IN SAID REFLECTING POSITION, PIVOT MEANS MOUNTING SAID PHOTOTRANSDUCING ELEMENT UPON SAID ASSEMBLY BETWEEN SAID MIRROR AND SAID SEALING PLATE AND DISPOSED IN LINE WITH SAID SEMITRANSPARENT PORTION OF SAID DEFLECTING MIRROR, MUTUALLY ENGAGING MEANS UPON SAID PHOTOTRANSDUCING ELEMENT AND SAID MIRROR AND SEALING PLATE ASSEMBLY FOR MAINTAINING
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) | 1966-06-10 | 1966-12-10 | 1967-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-10 | 1970-12-10 | 1971-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-10 | 1974-12-10 | 1975-06-11 | $7700.00 | Window Closed / Lapsed |