US4196992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Camera film winding and shutter release mechanism
Assignee: Pentax Corp
•
Filing: 1978-09-05
•
Granted: 1980-04-08
•
Expires: 1998-09-05
Abstract
Abstract A motorized system for a camera using a common motor for film winding and shutter release wherein the shutter release operation is performed for a first direction of rotation of the motor and the film winding operation performed for the second or opposite direction of rotation. A mechanism including a ratchet and pawl arrangement is provided for returning the actuating mechanism to its rest position during the winding operation. Depression of the shutter button causes a control signal to be transmitted effecting motor operation in the first direction which releases the shutter through the actuating mechanism. Once the shutter release has been completed, a locking lever is released which simultaneously actuates a switch causing the motor to reverse direction and releasing a locking ring which is coupled to the winding shaft of the camera. The winding operation continues until the locking lever falls back into position with the locking ring at which time power is removed from the motor. Depression of the shutter button repeats the process.
Inventors
- 👤 Tetsuji Shono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:41
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/42; G03B17/425
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
102 words
In a camera system having a single versible drive motor including means for actuating the shutter release mechanism for a first direction of rotation of said motor and means for performing a film winding operation in a second direction of rotation of said motor and further including means for reversing the direction of rotation of said motor when the operation of said shutter release mechanism has been completed, the improvement comprising: means for returning said means for actuating said shutter release mechanism from an active actuating position to a rest position while said motor is operated in said second direction of rotation.
Claim 2
Dependent Claim
102 words
In a camera system having a single versible drive motor including means for actuating the shutter release mechanism for a first direction of rotation of said motor and means for performing a film winding operation in a second direction of rotation of said motor and further including means for reversing the direction of rotation of said motor when the operation of said shutter release mechanism has been completed, the improvement comprising: means for returning said means for actuating said shutter release mechanism from an active actuating position to a rest position while said motor is operated in said second direction of rotation.
Claim 3
Dependent Claim
61 words
The camera system of claim 1 wherein said actuating means comprises a release gear rotating when said motor operates in said first direction, a shaft coupled to and rotating with said release gear, a rod extending laterally from said shaft, and a release lever, said release lever being rotatable from a rest position to an active actuating position by said rod.
Claim 4
Dependent Claim
22 words
The camera system of claim 2 further comprising first and second stop means for limiting the range of movement of said pin.
Claim 5
Dependent Claim
102 words
The camera system of claim 1 wherein said returning means comprises a ratchet wheel positioned on a shaft of said motor, a pawl holder, a pawl arm mounted upon said pawl holder, said pawl being positioned so that said pawl holder rotates when said motor rotates in said first direction and said pawl holder is released from being driven by said motor when said motor is in said second direction, a pin extending from said release gear at a position removed from the central axis thereof, and a spring coupled to said pin for urging said release gear towards a rest position.
Claim 6
Dependent Claim
24 words
The camera system of claim 1 further comprising a drive gear solidly coupled to said pawl holder and operatively engaged with said release gear.
Claim 7
Dependent Claim
35 words
The camera of claim 1 further comprising a winding shaft in said camera for winding film, cam means disposed on one end of said winding shaft and a locking lever responsive to said cam movement.
Claim 8
Dependent Claim
33 words
The camera of claim 6 further comprising switch means operative by said locking lever and said means to reverse the direction of said motor comprises a control circuit responsive to said switch means.
Claim 9
Dependent Claim
43 words
The camera of claim 7 wherein said locking lever moves in one direction in response to actuation of said shutter mechanism, whereby movement of said locking lever in said one direction actuates said switch means to rotate said motor in said second direction.
Claim 10
Dependent Claim
68 words
The camera of claim 7 wherein said control circuit comprises relay means responsive to said switch means to selectively reverse the direction of said motor or stop rotation thereof, said relay means comprising first and second relays, said first relay normally open to effectuate rotation of said motor in said reverse direction and said second relay normally open to effectuate rotation of said motor in said first direction.
References Cited (Backward Citations)
US3946409A
Cited
US4042942A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-08 | 1983-10-08 | 1984-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-08 | 1987-10-08 | 1988-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-08 | 1991-10-08 | 1992-04-08 | $7700.00 | Window Closed / Lapsed |