US3133486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Focal plane shutter mechanism
Assignee: Recon Optical Inc
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Filing: 1961-06-09
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Granted: 1964-05-19
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Expires: 1981-06-09
Abstract
No abstract record available.
Inventors
- 👤 Maurer John Andrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:26
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/08; G03B9/28; G03B9/32; G03B9/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A FOCAL PLANE SHUTTER MECHANISM COMPRISING A LEADING CURTAIN AND A FOLLOWING CURTAIN, A FIRST ROTATING CAM AND A CAM FOLLOWER AND A GEAR TRAIN BY WHICH THE FIRST CAM CONTROLS MOVEMENT OF THE LEADING CURTAIN IN BOTH DIRECTIONS BETWEEN TWO EXTREME POSITIONS, A SECOND ROTATING CAM AND A SECOND CAM FOLLOWER AND A SECOND GEAR TRAIN BY WHICH THE SECOND CAM CONTROLS MOVEMENT OF THE FOLLOWING CURTAIN IN BOTH DIRECTIONS BETWEEN TWO EXTREME POSITIONS, MOTOR DRIVING MEANS ADAPTED TO IMPART ROTATION TO BOTH THE FIRST CAM AND THE SECOND CAM, AND A DIFFERENTIAL GEAR MECHANISM BETWEEN THE MOTOR AND THE SECOND CAM FOR SELECTIVELY POSITIONING THE SECOND CAM IN ADVANCE AND IN RETARD RELATIVE TO THE POSITION OF THE FIRST CAM.
Claim 2
Dependent Claim
122 words
A FOCAL PLANE SHUTTER MECHANISM COMPRISING A LEADING CURTAIN AND A FOLLOWING CURTAIN, A FIRST ROTATING CAM AND A CAM FOLLOWER AND A GEAR TRAIN BY WHICH THE FIRST CAM CONTROLS MOVEMENT OF THE LEADING CURTAIN IN BOTH DIRECTIONS BETWEEN TWO EXTREME POSITIONS, A SECOND ROTATING CAM AND A SECOND CAM FOLLOWER AND A SECOND GEAR TRAIN BY WHICH THE SECOND CAM CONTROLS MOVEMENT OF THE FOLLOWING CURTAIN IN BOTH DIRECTIONS BETWEEN TWO EXTREME POSITIONS, MOTOR DRIVING MEANS ADAPTED TO IMPART ROTATION TO BOTH THE FIRST CAM AND THE SECOND CAM, AND A DIFFERENTIAL GEAR MECHANISM BETWEEN THE MOTOR AND THE SECOND CAM FOR SELECTIVELY POSITIONING THE SECOND CAM IN ADVANCE AND IN RETARD RELATIVE TO THE POSITION OF THE FIRST CAM.
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) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |