US3753480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stopping for film retrieval
Assignee: Fujifilm Holdings Corp
•
Filing: 1971-06-21
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Granted: 1973-08-21
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Expires: 1991-06-21
Abstract
Abstract In a device for restricting the stopping position of a film shifting mechanism by means of a cam stopper provided between the film shifting mechanism and a cam, a shock absorbing spring is disposed between the cam and a driving shaft. On the driving shaft are mounted two cams consisting of a normal rotation stopping cam and a reverse rotation stopping cam, and two stoppers are provided to stop the respective cams. These two stoppers are operated by a single operating lever.
Inventors
- 👤 T Okano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:51
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/10; G03B21/11; G03B21/115; G03B21/116
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
132 words
A stopping device in a mechanism for shifting a film or the like, comprising a driving shaft for effecting the shifting of the film, one gear driven by said driving shaft, two gears meshing with said one gear, cam members positioned on each of said two gears through shock absorbing means in such a manner that the positions of said cam members are reverse to each other with respect to the rotating direction of said gears, two cam stoppers engageable with said respective cam memberS for stopping the rotation thereof and an operating lever adapted to move concurrently both of said two cam stoppers between the positions in which said cam stoppers are engageable with said cam members and the positions in which said cam stoppers are disengaged from said cam members.
Claim 2
Dependent Claim
132 words
A stopping device in a mechanism for shifting a film or the like, comprising a driving shaft for effecting the shifting of the film, one gear driven by said driving shaft, two gears meshing with said one gear, cam members positioned on each of said two gears through shock absorbing means in such a manner that the positions of said cam members are reverse to each other with respect to the rotating direction of said gears, two cam stoppers engageable with said respective cam memberS for stopping the rotation thereof and an operating lever adapted to move concurrently both of said two cam stoppers between the positions in which said cam stoppers are engageable with said cam members and the positions in which said cam stoppers are disengaged from said cam members.
Claim 3
Dependent Claim
28 words
A stopping device according to claim 1, wherein said shock absorbing means is a spring member disposed between said gear and said cam member coaxial with said gear.
Claim 4
Dependent Claim
18 words
A stopping device according to claim 1, wherein said operating lever is a movable member of a solenoid.
Claim 5
Dependent Claim
29 words
A stopping device according to claim 3, wherein each of said cam stoppers is spring-biased such that it is engaged by the cam member when said solenoid is deenergized.
Claim 6
Dependent Claim
42 words
A stopping device according to claim 1, wherein said two cam stoppers are pivotable substantially L-shaped levers having ends joined in overlapping relation with each other and said operating lever is held in engagement with said cam stoppers at said overlapping portion.
Claim 7
Dependent Claim
53 words
A stopping device according to claim 1, wherein a toothed pulley is fixedly mounted on said driving shaft and screw rods are rotated by a corrugated belt which is driven by said pulley, so that a film carrier frame threadably mounted on said screw rods is shifted when the screw rods are rotated.
Claim 8
Dependent Claim
45 words
A stopping device according to claim 6, wherein a microswitch operating projection is formed on a portion of said frame and microswitches are arranged side by side along the path of movement of said projection at the same pitch as that of the film frames.
References Cited (Backward Citations)
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US1636324A
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US1730014A
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US1915910A
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US2010366A
Cited
US3655279A
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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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |