US3735683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor driven photographic camera
Assignee: Minolta Co Ltd
•
Filing: 1972-09-08
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Granted: 1973-05-29
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Expires: 1992-09-08
Abstract
Abstract A motor driven photographic camera having a motor for driving a film winding/shutter charging mechanism, wherein there is provided a manually operative shaft for selectively disconnecting the motor from the film winding/shutter charging mechanism for transmitting the rotational movement of the motor to a film rewinding gear. There is also provided a film rewinding shaft which is connected to the film rewinding gear through a stop lever and which is rotatable in coaxial relationship with the film rewinding gear. The film rewinding shaft has a clutch for transmitting the rotational movement thereof to a shaft to film magazine. The rotation of the film rewinding shaft is stopped temporarily for displacing the shaft axially with respect to the film rewinding gear for connecting the clutch of the film rewinding shaft to the film rewinding spool of the magazine. After and while maintaining the engagement between the clutch and the film rewinding spool shaft, the film rewinding shaft is released from its locked position and allowed to rotate for rewinding the film.
Inventors
- 👤 K Umeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:37
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/42; G03B17/425
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
273 words
A film rewinding mechanism for a motor driven photographic camera, comprising: a motor; an operating shaft rotatably supported on stationary members of the camera aNd axially movable between a first position for winding a film and a second position for rewinding the film; an operating member for positioning said operating shaft in said first or second position; a means for transmitting rotational movement of the motor to said operating shaft when the operating shaft is in said second position; a shaft sleeve held in an axially fixed position by stationary members of the camera and adapted to transmit the rotational movement of said operating shaft; a rewinding shaft slidably movable with respect to said shaft sleeve and having a first stop member securely mounted thereon and a clutch means; a connecting spring member for connecting said shaft sleeve with said rewinding shaft; a driving means for driving said rewinding shaft toward a shaft of a film magazine against action of said connecting spring member by relative rotational movement between said rewinding shaft which is held in a stop position and said shaft sleeve which is maintained in rotation; and a second stop member adapted to be disengaged from said first stop member when said operating shaft is in said first position and to be engaged with said first stop member when the operating shaft is in said second position for stopping the rotational movement of said rewinding shaft until the rewinding shaft is axially displaced by a predetermined distance with respect to said shaft sleeve to bring said clutch means of said rewinding shaft into engagement with a shaft of a film magazine.
Claim 2
Dependent Claim
273 words
A film rewinding mechanism for a motor driven photographic camera, comprising: a motor; an operating shaft rotatably supported on stationary members of the camera aNd axially movable between a first position for winding a film and a second position for rewinding the film; an operating member for positioning said operating shaft in said first or second position; a means for transmitting rotational movement of the motor to said operating shaft when the operating shaft is in said second position; a shaft sleeve held in an axially fixed position by stationary members of the camera and adapted to transmit the rotational movement of said operating shaft; a rewinding shaft slidably movable with respect to said shaft sleeve and having a first stop member securely mounted thereon and a clutch means; a connecting spring member for connecting said shaft sleeve with said rewinding shaft; a driving means for driving said rewinding shaft toward a shaft of a film magazine against action of said connecting spring member by relative rotational movement between said rewinding shaft which is held in a stop position and said shaft sleeve which is maintained in rotation; and a second stop member adapted to be disengaged from said first stop member when said operating shaft is in said first position and to be engaged with said first stop member when the operating shaft is in said second position for stopping the rotational movement of said rewinding shaft until the rewinding shaft is axially displaced by a predetermined distance with respect to said shaft sleeve to bring said clutch means of said rewinding shaft into engagement with a shaft of a film magazine.
Claim 3
Dependent Claim
71 words
A film rewinding mechanism for a motor driven photographic camera as set forth in claim 1, wherein the shaft sleeve held in an axially fixed position by stationary members of the camera has formed on the outer periphery thereof with a spiral groove, and said film rewinding shaft is provided on the side surface thereof with a pin member which is slidably engaged by said spiral groove of said shaft sleeve.
Claim 4
Dependent Claim
202 words
A film rewinding mechanism for a motor driven photographic camera as set forth in claim 1, wherein said film rewinding shaft has provided at one end thereof with a clutch means engageable with the shaft of the film magazine and at the other end with a ratchet gear, further including a stop lever having provided on one arm thereof with a hooked portion and on the other arm thereof with a member engaged by a locking member provided on the operating shaft, said hooked portion of the stop lever being biased toward the center of said ratchet gear by means of a spring, said locking member releasing the stop lever from a locked position thereof when said operating lever is shifted from the first position to the second position, thereby allowing the hooked portion of the stop lever to engage with the ratchet gear, the hooked portion of the stop lever being disengaged from the ratchet gear when the film rewinding shaft is axially displaced with respect to the shaft sleeve and the clutch means of the rewinding shaft is engaged by the film magazine shaft, the stop lever holding said rewinding shaft in an axially locked position through said ratchet gear.
Claim 5
Dependent Claim
110 words
A film rewinding mechanism for a motor driven photographic camera as set forth in claim 1, further including a gear means disengageably meshing with a gear connected to an output shaft of the motor, said gear means being securely mounted on a sleeve slidably fitted over the operating shaft and having a longitudinal slot for receiving thereinto a pin member projecting radially from said operating shaft, said sleeve being slidably and rotatably fitted in an aperture formed in a stationary portion of the camera body and having a spring resting on one face of said stationary portion and a collar slidably engaged with the other face of said stationary portion.
Claim 6
Dependent Claim
100 words
A film rewinding mechanism for a motor driven photographic camera as set forth in claim 1, wherein said clutch means is slidably fitted over said rewinding shaft for movement therealong and having a longitudinal slot extending parallel to the axis of said rewiNding shaft and engaged by a pin member radially projecting from said rewinding shaft, said clutch means being provided at the upper end thereof with an axial projection engageable with a pin member projecting inwardly from the inner surface of the film magazine shaft, further including a spring member inserted between the clutch means and the rewinding shaft.
Claim 7
Dependent Claim
237 words
A film rewinding mechanism for a motor driven photographic camera, comprising: a motor; an operating member movable between a first position for winding a film and a second position for rewinding the film; a shaft sleeve held in an axially fixed position by stationary members of the camera; means for transmitting rotational movement of the motor to said shaft sleeve when said operating member is in said second position; a rewinding shaft sliding movable with respect to said shaft sleeve and having a first stop member securely mounted thereon and a clutch means; a connecting spring member for connecting said shaft sleeve with said rewinding shaft; a driving means for driving said rewinding shaft toward a shaft of a film magazine against action of said connecting spring member by relative rotational movement between said rewinding shaft which is held in a stop position and said shaft sleeve which is maintained in rotation; and a second stop member adapted to be disengaged from said first stop member when said operating member is in said first position and to be engaged with said first stop member when said operating member is in said second position for stopping the rotational movement of said rewinding shaft until the rewinding shaft is axially displaced by a predetermined distance with respect to said shaft sleeve to bring said clutch means of said rewinding shaft into engagement with a shaft of a film magazine.
Claim 8
Dependent Claim
237 words
A film rewinding mechanism for a motor driven photographic camera, comprising: a motor; an operating member movable between a first position for winding a film and a second position for rewinding the film; a shaft sleeve held in an axially fixed position by stationary members of the camera; means for transmitting rotational movement of the motor to said shaft sleeve when said operating member is in said second position; a rewinding shaft sliding movable with respect to said shaft sleeve and having a first stop member securely mounted thereon and a clutch means; a connecting spring member for connecting said shaft sleeve with said rewinding shaft; a driving means for driving said rewinding shaft toward a shaft of a film magazine against action of said connecting spring member by relative rotational movement between said rewinding shaft which is held in a stop position and said shaft sleeve which is maintained in rotation; and a second stop member adapted to be disengaged from said first stop member when said operating member is in said first position and to be engaged with said first stop member when said operating member is in said second position for stopping the rotational movement of said rewinding shaft until the rewinding shaft is axially displaced by a predetermined distance with respect to said shaft sleeve to bring said clutch means of said rewinding shaft into engagement with a shaft of a film magazine.
References Cited (Backward Citations)
US3598033A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |