US3873193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film rewind device in a cinecamera
Assignee: Nikon Corp
•
Filing: 1973-02-16
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Granted: 1975-03-25
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Expires: 1993-02-16
Abstract
Abstract A cinecamera using a film magazine having reverse rotation preventing means at the take-up side thereof includes drive means engageable with a take-up core in the magazine to rotate the core in take-up direction, and means provided in the body of the camera for stopping the drive means to transport a film loosely into a take-up chamber. A resilient member is attached to the camera for engagement with the take-up core to interrupt the rotation of the core caused by the transport of the film into the take-up chamber when the take-up action of the take-up core is stopped.
Inventors
- 👤 Yozo Iida
- 👤 Hideyo Nozawa
- 👤 Shigeo Akasaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:28
CPC Classifications
G; G03; G03B; G03B19/00; G03B19/18; G03B21/00; G03B21/14; G03B21/32; G03B21/43
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
106 words
Apparatus in a cinecamera using a film magazine having an opening for exposure and having means for preventing reverse rotation of a take-up core in a take-up chamber of the magazine, the apparatus comprising drive means, rotatable means having means engageable with the take-up core for causing rotation of the take-up core with the rotatable means, and coupling means for coupling the drive means to the rotatable means to rotate the drive means and the take-up core, the improvement comprising a resilient member provided on the rotatable means and engageable with the take-up core for opposing rotation of the take-up core relative to the rotatable means.
Claim 2
Dependent Claim
106 words
Apparatus in a cinecamera using a film magazine having an opening for exposure and having means for preventing reverse rotation of a take-up core in a take-up chamber of the magazine, the apparatus comprising drive means, rotatable means having means engageable with the take-up core for causing rotation of the take-up core with the rotatable means, and coupling means for coupling the drive means to the rotatable means to rotate the drive means and the take-up core, the improvement comprising a resilient member provided on the rotatable means and engageable with the take-up core for opposing rotation of the take-up core relative to the rotatable means.
Claim 3
Dependent Claim
53 words
Apparatus as set forth in claim 1, wherein the coupling means comprises clutch means for selectively coupling the drive means to the rotatable means, and wherein said apparatus further comprises means for preventing rotation of the rotatable means when the rotatable means is not coupled to the drive means by said clutch means.
Claim 4
Dependent Claim
25 words
Apparatus as set forth in claim 2, wherein the means for preventing rotation is fixed to the clutch means and engageable with the rotatable means.
Claim 5
Dependent Claim
29 words
Apparatus as set forth in claim 1, wherein the means engageable with the take-up core for causing rotation of the take-up core with the rotatable means comprises a projection.
References Cited (Backward Citations)
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US3348786A
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US3514197A
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US3689137A
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US3700317A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |