Patent US3289561A successfully refreshed from Google Patents.
US3289561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Focal plane shutter
Assignee: Recon Optical Inc
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Filing: 1964-08-20
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Granted: 1966-12-06
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Expires: 1984-08-20
Abstract
No abstract record available.
Inventors
- 👤 John A Maurer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:55
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/08; G03B9/28; G03B9/32; G03B9/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
181 words
AN IMPROVED FOCAL PLANE SHUTTER MEACHANISM COMPRISING A LEADING CURTAIN MEANS AND A FOLLOWING CURTAIN MEANS, A SPRING POWERED TAKE-UP ROLLER FOR EACH OF SAID LEADING AND FOLLOWING CURTAIN MEANS, A CURTAIN FEED ROLLER COMMON TO BOTH SAID LEADING AND FOLLOWING CURTAIN MEANS, GUIDE ROLLER MEANS FOR VARYING THE POSITION OF SAID LEADING CURTAIN MEANS RELATIVE TO SAID FOLLOWING CURTAIN MEANS, OSCILLATABLE LEVER MEANS SUPPORTING SAID GUIDE ROLLER MEANS FOR CONTROLLABLY OSCILLATING THE LATTER BETWEEN A SLIT DEFINING POSITION AND A CURTAIN CAPPED POSITION, DRIVE MEANS FOR RELEASING SAID CURTAIN FEED ROLLER TO PERMIT SAID SPRING POWERED TAKE-UP ROLLERS TO WIND SAID LEADING AND FOLLOWING CURTAIN MEANS THEREON TO THEREBY CAUSE SAID CURTAIN ME ANS TO TRAVERSE AN EXPOSURE AREA WITH AN EXPOSURE SLIT OF PREDETERMINED WIDTH THEREBETWEEN, CAM AND ROCKER MEANS COUPLED BETWEEN SAID DRIVE MEANS AND SAID OSCILLATABLE LEVER MEANS FOR OSCILLATING THE LATTER FROM SAID SLIT DEFINING POSITION TO SAID CURTAIN CAPPED POSITION AND FOR RETURNING SAID LEVER MEANS TO SAID SLIT DEFINING POSITION, AND LIMIT MEANS FOR ESTABLISHING THE SLIT DEFINING POSITION OF SAID OSCILLATABLE LEVER MEANS.
Claim 2
Dependent Claim
181 words
AN IMPROVED FOCAL PLANE SHUTTER MEACHANISM COMPRISING A LEADING CURTAIN MEANS AND A FOLLOWING CURTAIN MEANS, A SPRING POWERED TAKE-UP ROLLER FOR EACH OF SAID LEADING AND FOLLOWING CURTAIN MEANS, A CURTAIN FEED ROLLER COMMON TO BOTH SAID LEADING AND FOLLOWING CURTAIN MEANS, GUIDE ROLLER MEANS FOR VARYING THE POSITION OF SAID LEADING CURTAIN MEANS RELATIVE TO SAID FOLLOWING CURTAIN MEANS, OSCILLATABLE LEVER MEANS SUPPORTING SAID GUIDE ROLLER MEANS FOR CONTROLLABLY OSCILLATING THE LATTER BETWEEN A SLIT DEFINING POSITION AND A CURTAIN CAPPED POSITION, DRIVE MEANS FOR RELEASING SAID CURTAIN FEED ROLLER TO PERMIT SAID SPRING POWERED TAKE-UP ROLLERS TO WIND SAID LEADING AND FOLLOWING CURTAIN MEANS THEREON TO THEREBY CAUSE SAID CURTAIN ME ANS TO TRAVERSE AN EXPOSURE AREA WITH AN EXPOSURE SLIT OF PREDETERMINED WIDTH THEREBETWEEN, CAM AND ROCKER MEANS COUPLED BETWEEN SAID DRIVE MEANS AND SAID OSCILLATABLE LEVER MEANS FOR OSCILLATING THE LATTER FROM SAID SLIT DEFINING POSITION TO SAID CURTAIN CAPPED POSITION AND FOR RETURNING SAID LEVER MEANS TO SAID SLIT DEFINING POSITION, AND LIMIT MEANS FOR ESTABLISHING THE SLIT DEFINING POSITION OF SAID OSCILLATABLE LEVER MEANS.
References Cited (Backward Citations)
US2192500A
Cited
US2335690A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |