US3400645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Central photographic shutter
Assignee: Agfa Gevaert AG
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Filing: 1966-02-08
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Granted: 1968-09-10
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Expires: 1986-02-08
Abstract
No abstract record available.
Inventors
- 👤 Kiper Gerd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:11
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/08; G03B9/10; G03B9/18; G03B9/22; G03B7/00; G03B7/08; G03B7/081; G03B7/083
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
IN A PHOTOGRAPHIC SHUTTER OF THE CENTRAL TYPE INCLUDING A HOUSING, A PAIR OF ROTATABLY MOUNTED SECTOR OPERATING RINGS IN SAID HOUSING, SAID RINGS BEING AN OPENING RING AND A CLOSING RING, A NUMBER OF SHUTTER SECTORS, EACH OF SAID SHUTTER SECTORS BEING MOVABLY CONNECTED TO BOTH OF SAID RINGS TO CAUSE SAID RINGS TO OPEN AND CLOSE SAID SECTORS WHEN THE ANGULAR PHASE BETWEEN SAID RINGS VARIES FROM THE NORMAL CONDITION AND RETURNS TO IT, EXPOSURE CONTROL MEANS FOR VARYING SAID ANGULAR PHASE BETWEEN SAID RINGS, SAID EXPOSURE CONTROL MEANS INCLUDING A DELAY SWITCH CIRCUIT HAVING RETARDING AFFECTING MAGNETIC MEANS, VARIABLE MEANS IN SAID CIRCUIT FOR ADJUSTING THE STRENGTH OF SAID MAGNETIC MEANS, ARRESTING MEANS OPERATIVELY ASSOCIATED WITH SAID CLOSING RING FOR GOVERNING ITS ANGULAR VELOCITY, AND SAID MAGNETIC MEANS CONTROLLING THE OPERATIVE TIME OF RETARDING ACTION OF SAID ARRESTING MEANS.
Claim 2
Dependent Claim
142 words
IN A PHOTOGRAPHIC SHUTTER OF THE CENTRAL TYPE INCLUDING A HOUSING, A PAIR OF ROTATABLY MOUNTED SECTOR OPERATING RINGS IN SAID HOUSING, SAID RINGS BEING AN OPENING RING AND A CLOSING RING, A NUMBER OF SHUTTER SECTORS, EACH OF SAID SHUTTER SECTORS BEING MOVABLY CONNECTED TO BOTH OF SAID RINGS TO CAUSE SAID RINGS TO OPEN AND CLOSE SAID SECTORS WHEN THE ANGULAR PHASE BETWEEN SAID RINGS VARIES FROM THE NORMAL CONDITION AND RETURNS TO IT, EXPOSURE CONTROL MEANS FOR VARYING SAID ANGULAR PHASE BETWEEN SAID RINGS, SAID EXPOSURE CONTROL MEANS INCLUDING A DELAY SWITCH CIRCUIT HAVING RETARDING AFFECTING MAGNETIC MEANS, VARIABLE MEANS IN SAID CIRCUIT FOR ADJUSTING THE STRENGTH OF SAID MAGNETIC MEANS, ARRESTING MEANS OPERATIVELY ASSOCIATED WITH SAID CLOSING RING FOR GOVERNING ITS ANGULAR VELOCITY, AND SAID MAGNETIC MEANS CONTROLLING THE OPERATIVE TIME OF RETARDING ACTION OF SAID ARRESTING MEANS.
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) | 1971-09-10 | 1972-03-11 | 1972-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-10 | 1976-03-11 | 1976-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-10 | 1980-03-11 | 1980-09-10 | $7700.00 | Window Closed / Lapsed |