US4021826A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Camera control device
Assignee: West Electric Co Ltd
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Filing: 1975-04-14
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Granted: 1977-05-03
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Expires: 1995-04-14
Abstract
Abstract In response to the film drive control pulse signal generated when the shutter is closed, a switching circuit is turned ON to energize a film driving motor. When the film has been transported by a predetermined length, another control signal is generated to turn OFF the switching circuit. A control circuit is connected to a control circuit for controlling the shutter and to a circuit for controlling the motor in such a way that in response to the multi-exposure mode signal the control circuit will not energize the motor even when the pulse signal has been generated after the exposure. Thus the camera control device offers versatile multi-exposure operation.
Inventors
- 👤 Hiroshi Iwata
- 👤 Katsuji Ishikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:24
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/42; G03B17/425; G03B9/00; G03B9/58
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
164 words
A camera control device comprising A. an exposure control mechanism comprising shutter blades defining an exposure aperture, and a stepping motor operatively coupled to said shutter blades to open and close said exposure aperture in a plurality of discrete steps in response to motor driving signals applied for controlling the exposure of a film; B. shutter control means for providing said driving signals, thereby electrically controlling the operation of said exposure control mechanism; C. film transporting means electrically connected to said exposure control mechanism and including a motor for transporting the film by a predetermined length in response to closing of said exposure aperture; D. operation mode control means electrically connected to said exposure control mechanism, said film transporting means and a power supply for selectively interfering with the response of said film transporting means to said shutter blades; E. said power supply comprising means for supplying the power to said shutter control means, said film transporting means and said operation mode control means.
Claim 2
Dependent Claim
164 words
A camera control device comprising A. an exposure control mechanism comprising shutter blades defining an exposure aperture, and a stepping motor operatively coupled to said shutter blades to open and close said exposure aperture in a plurality of discrete steps in response to motor driving signals applied for controlling the exposure of a film; B. shutter control means for providing said driving signals, thereby electrically controlling the operation of said exposure control mechanism; C. film transporting means electrically connected to said exposure control mechanism and including a motor for transporting the film by a predetermined length in response to closing of said exposure aperture; D. operation mode control means electrically connected to said exposure control mechanism, said film transporting means and a power supply for selectively interfering with the response of said film transporting means to said shutter blades; E. said power supply comprising means for supplying the power to said shutter control means, said film transporting means and said operation mode control means.
Claim 3
Dependent Claim
119 words
A camera control device as set forth in claim 1 wherein said film transporting means comprises a. a film driving motor; b. a first switching means connected to said power supply means and said film driving motor and actuated by a film driving signal in response to said closing of said exposure aperture to connect electrically said film driving motor to said power supply means; c. film transport detecting means d. a switch element connected parallel to said film driving motor in response to a signal from said film transport detecting means; and e. a turn-off circuit means connected between said first switching means and said switch element for turning off said first switching means through said switch element.
Claim 4
Dependent Claim
27 words
A camera control device as set forth in claim 2 wherein said first switching means further comprises a manual switching means for switching said first switching means.
Claim 5
Dependent Claim
93 words
A camera control device as set forth in claim 1 wherein said operation mode control means comprises a. an operation mode control signal discriminating means for selectively not generating and generating a signal corresponding to operation mode control signals; b. a means for supplying operation mode control signals to said power supply means and said operation mode control signal discriminating means; and c. a switching means for generating a signal to control the actuation of said film drive control means selectively corresponding to the signal from said operation mode control signal discriminating means.
Claim 6
Dependent Claim
82 words
A camera control device as set forth in claim 4 wherein said operation mode control signal discriminating means comprises a switch element actuated in response to the operation mode control signals which are one pulse signal and two pulse signals used selectively, a delay circuit actuated in response to a signal from said power supply means according to the operation mode control signal, and a NOR circuit generating a signal in response to signals from said switch element and said delay circuit.
Claim 7
Dependent Claim
43 words
A camera control device as set forth in claim 4 wherein said switching means comprises a switch element actuated in response to the signal from said operation mode control signal discriminating means and a switching circuit actuated by conduction of said switch element.
Claim 8
Dependent Claim
37 words
A camera control device as set forth in claim 6 wherein said switching element is capable of being short-circuited by a further switch element in response to a signal from an exposure aperture closed signal generating means.
Claim 9
Dependent Claim
29 words
A camera control device as set forth in claim 6 wherein output terminals of said switching circuit are capable of being selectively short-circuited by a manually operated switch element.
Claim 10
Dependent Claim
30 words
A camera control device as set forth in claim 4 wherein said operating mode control signals are capable of being applied with a switch by operating a shutter release button.
Claim 11
Dependent Claim
31 words
A camera control device in a camera as set forth in claim 4 wherein said operating mode control signals are capable of being applied by a source remote from said camera.
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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) | 1980-05-02 | 1980-11-01 | 1981-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-02 | 1984-11-01 | 1985-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-02 | 1988-11-01 | 1989-05-03 | $7700.00 | Window Closed / Lapsed |