Patent US3559911A successfully refreshed from Google Patents.
US3559911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forward-reverse run automatic stop device for film rewind device of miniature movie camera
Assignee: Nikon Corp
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Filing: 1969-02-19
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Granted: 1971-02-02
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Expires: 1989-02-19
Abstract
Abstract The present invention presents a device for enabling the film rewinding in a miniature movie camera using a film cartridge having no feed spool operable from outside the camera. According to this invention, when the film in forward run is stopped midway by freeing the release operation of the shutter button before the forward run automatic stopping device works and reverse operation is made successively, these operations can be performed without any trouble. An accident caused by erroneous operation is prevented and at the same time, the amount of film loosely stored in the film cartridge can be measured.
Inventors
- 👤 Yoshihisa Katsuyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:44
CPC Classifications
G; G03; G03B; G03B19/00; G03B19/18; G03B19/26; G03B21/00; G03B21/14; G03B21/32; G03B21/43
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
258 words
A forward-reverse run automatic stop device for a film rewinding device of a miniature movie camera comprising two stop claw discs having pushout cams fixed face-to-face together with a worm on a shaft interlockable with a shutter device; a driven gear having a film takeup disc for driving a film take up shaft and a countergear having a pin provided eccentrically to a supporting shaft by a predetermined amount rotatably mounted on the camera body, respectively, with a predetermined space therebetween; an idler gear operable as a worm wheel meshing with said worm intermediate said driven gear and countergear; a clutch lever rockably mounted on the camera body for selective engagement with the driven gear and the countergear, and the clutch lever having a bent portion; a counter disc having a notch to receive said bent portion; the idler gear being supported by the clutch lever; the counterdisc being unitary with the countergear and the outer diameter of the counterdisc being determined so that the bent portion of the clutch lever contacts the outer edge of the counterdisc when the idler gear is in a state of meshing with the countergear; a footage stopper pivotably supported on the camera body for swing motion and normally maintained in vertical state by having its lower end portion restricted by a pin provided on the camera body and a snap spring, the upper end portion of the stopper being positioned between said stop claw discs and a vertical bent portion thereof being intermittently contactable by a pin secured to said countergear.
Claim 2
Dependent Claim
258 words
A forward-reverse run automatic stop device for a film rewinding device of a miniature movie camera comprising two stop claw discs having pushout cams fixed face-to-face together with a worm on a shaft interlockable with a shutter device; a driven gear having a film takeup disc for driving a film take up shaft and a countergear having a pin provided eccentrically to a supporting shaft by a predetermined amount rotatably mounted on the camera body, respectively, with a predetermined space therebetween; an idler gear operable as a worm wheel meshing with said worm intermediate said driven gear and countergear; a clutch lever rockably mounted on the camera body for selective engagement with the driven gear and the countergear, and the clutch lever having a bent portion; a counter disc having a notch to receive said bent portion; the idler gear being supported by the clutch lever; the counterdisc being unitary with the countergear and the outer diameter of the counterdisc being determined so that the bent portion of the clutch lever contacts the outer edge of the counterdisc when the idler gear is in a state of meshing with the countergear; a footage stopper pivotably supported on the camera body for swing motion and normally maintained in vertical state by having its lower end portion restricted by a pin provided on the camera body and a snap spring, the upper end portion of the stopper being positioned between said stop claw discs and a vertical bent portion thereof being intermittently contactable by a pin secured to said countergear.
Claim 3
Dependent Claim
67 words
A forward-reverse run automatic stop device for a film rewinding device of a miniature movie camera according to claim 1, the device further comprising a predetermined divisional footage scale indices engraved on the counterdisc and a corresponding index mark is fixed to the camera, the footage scale and the index mark forming a footage counter which indicates the amount of film stored loosely in the film cartridge.
References Cited (Backward Citations)
US2271221A
Cited
US2398133A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |