Patent US3324780A successfully refreshed from Google Patents.
US3324780A
Expired / Lapsed
US
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Zoom lens control
Assignee: Yashica Co Ltd
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Filing: 1963-10-03
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Granted: 1967-06-13
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Expires: 1983-10-03
Abstract
No abstract record available.
Inventors
- 👤 Miyauchi Hideo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:25
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/02; G03B17/12; G03B17/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
IN COMBINATION WITH A ZOOM LENS INCLUDING A BARREL PROVIDED AT ITS REAR END WITH A COAXIAL ROTATABLE LENS CONTROL FIRST GEAR AND A SELECTIVELY CONTROLLABLE ROTARY DRIVE MEMBER, A SLIPPING CLUTCH ASSEMBLY COUPLING SAID DRIVE MEMBER TO SAID CONTROL GEAR COMPRISING A SECOND GEAR COAXIAL WITH SAID DRIVE MEMBER AND ENGAGING SAID FIRST GEAR AND HAVING AN END FACE CONFRONTING SAID DRIVE MEMBER, A FRICTION ANNULUS ENGAGING SAID END FACE, AND A HELICAL COMPRESSION SPRING ENTRAPPED BETWEEN SAID ANNULUS AND SAID DRIVE MEMBER AND URGING SAID ANNULUS TOWARD SAID END FACE.
Claim 2
Dependent Claim
92 words
IN COMBINATION WITH A ZOOM LENS INCLUDING A BARREL PROVIDED AT ITS REAR END WITH A COAXIAL ROTATABLE LENS CONTROL FIRST GEAR AND A SELECTIVELY CONTROLLABLE ROTARY DRIVE MEMBER, A SLIPPING CLUTCH ASSEMBLY COUPLING SAID DRIVE MEMBER TO SAID CONTROL GEAR COMPRISING A SECOND GEAR COAXIAL WITH SAID DRIVE MEMBER AND ENGAGING SAID FIRST GEAR AND HAVING AN END FACE CONFRONTING SAID DRIVE MEMBER, A FRICTION ANNULUS ENGAGING SAID END FACE, AND A HELICAL COMPRESSION SPRING ENTRAPPED BETWEEN SAID ANNULUS AND SAID DRIVE MEMBER AND URGING SAID ANNULUS TOWARD SAID END FACE.
References Cited (Backward Citations)
US2600636A
Cited
US2924146A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-12 | 1970-12-12 | 1971-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-12 | 1974-12-12 | 1975-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-12 | 1978-12-12 | 1979-06-13 | $7700.00 | Window Closed / Lapsed |