US3893136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor driven camera
Assignee: Fujinon Corp
•
Filing: 1974-01-17
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Granted: 1975-07-01
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Expires: 1994-01-17
Abstract
Abstract An electric motor is provided in the camera to actuate a mechanism to charge the shutter and feed the film upon release of the shutter. A shutter release signal generating circuit is connected with a one shot multivibrator which is connected with a flip-flop circuit connected with the motor to operate the motor. Upon generation of the shutter release signal, the one shot multivibrator is energized to generate a pulse signal which actuates a shutter release mechanism. When the pulse generated from the one shot multivibrator falls, the flip-flop is actuated to start the motor to charge the shutter and feed the film. Upon completion of the shutter charge and the film feed, a signal is generated and put into the flip-flop circuit to stop the motor.
Inventors
- 👤 Kunio Ando
- 👤 Ryuzo Mukoyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:37
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/42; G03B17/425; G03H; G03H1/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
214 words
In a motor driven camera in which the shutter is charged and film is fed by the power of a motor built in the camera body, the improvement comprising: a power supply, an electric motor associated with a shutter charge means and a film feed means for charging the shutter and feeding the film by the rotation thereof, a flip-flop circuit connected between the power supply and the electric motor to selectively energize the motor, a shutter release signal generating means which generates a signal upon depression of a shutter button, a film wind-up completion signal generating means which generates a signal upon completion of the shutter charge and the film feed, and a one shot multivibrator which generates a pulse having a width corresponding to the exposure time, said one shot multivibrator being connected with said shutter release signal generating means for generating said pulse upon receipt of a signal therefrom, said flip-flop circuit being connected with said one shot multivibrator and said film wind-up completion signal generating means so that the flip-flop circuit is put into a state to energize the motor when the pulse from the one shot multivibrator falls and is put into the other state to deenergize the motor upon receipt of a signal from said signal generating means.
Claim 2
Dependent Claim
214 words
In a motor driven camera in which the shutter is charged and film is fed by the power of a motor built in the camera body, the improvement comprising: a power supply, an electric motor associated with a shutter charge means and a film feed means for charging the shutter and feeding the film by the rotation thereof, a flip-flop circuit connected between the power supply and the electric motor to selectively energize the motor, a shutter release signal generating means which generates a signal upon depression of a shutter button, a film wind-up completion signal generating means which generates a signal upon completion of the shutter charge and the film feed, and a one shot multivibrator which generates a pulse having a width corresponding to the exposure time, said one shot multivibrator being connected with said shutter release signal generating means for generating said pulse upon receipt of a signal therefrom, said flip-flop circuit being connected with said one shot multivibrator and said film wind-up completion signal generating means so that the flip-flop circuit is put into a state to energize the motor when the pulse from the one shot multivibrator falls and is put into the other state to deenergize the motor upon receipt of a signal from said signal generating means.
Claim 3
Dependent Claim
36 words
A motor driven camera as defined in claim 1 wherein a shutter opening means is connected with said one shot multivibrator to open the shutter upon receipt of the pulse signal from the one shot multivibrator.
Claim 4
Dependent Claim
45 words
A motor driven camera as defined in claim 2 wherein said shutter opening means comprises an amplifier directly connected with said one shot multivibrator so that the amplifier may be operated in response to the rise of the pulse generated from the one shot multivibrator.
Claim 5
Dependent Claim
62 words
A motor driven camera as defined in claim 3 further comprising a shutter closing means which comprises an amplifier and a time constant circuit connected between the amplifier and the one shot multivibrator so that the amplifier may be operated when a time predetermined by the time constant circuit has lapsed after the rise of the pulse from the one shot multivibrator.
Claim 6
Dependent Claim
18 words
A motor driven camera as defined in claim 4 wherein said predetermined time is the shutter exposure time.
Claim 7
Dependent Claim
37 words
A motor driven camera as defined in claim 4 wherein said amplifiers of the shutter opening means and the shutter closing means are connected with solenoids to open and close the shutter through transistor switching circuits, respectively.
Claim 8
Dependent Claim
90 words
A motor driven camera as defined in claim 1 further comprising a shutter release signal generating means which generates a signal upon depression of a shutter button, a shutter opening means which opens the shutter upon receipt of the signal from said shutter release signal generating means, and a shutter closing means comprising a delay circuit and means for closing the shutter upon receipt of said shutter release signal, said means for closing the shutter being connected with said shutter release signal generating means by way of said delay circuit.
Claim 9
Dependent Claim
25 words
A motor driven camera as defined in claim 7 wherein said delay circuit comprises an electric time constant circuit which controls the shutter exposure time.
Claim 10
Dependent Claim
61 words
A motor driven camera as defined in claim 1 further comprising a braking switch connected in parallel with said motor to perform a dynamic braking by the closure thereof, and a time constant circuit connected between said second signal generating means and said braking switch, whereby the braking switch is closed during the time long enough to completely stop the motor.
Claim 11
Dependent Claim
76 words
A motor driven camera as defined in claim 1 further comprising a shutter release signal generating means which generates a signal upon depression of a shutter button, a shutter release means for operating the shutter upon receipt of the signal from the shutter release signal generating means, and a gate circuit connected between said shutter release signal generating means and said shutter release means for selectively transmitting the shutter release signal to said shutter release means.
Claim 12
Dependent Claim
30 words
A motor driven camera as defined in claim 10 wherein said gate circuit is operated to prevent the transmission of said shutter release signal while the camera is in operation.
Claim 13
Dependent Claim
25 words
A motor driven camera as defined in claim 11 wherein said gate circuit is supplied with a signal which indicates that the motor is rotating.
Claim 14
Dependent Claim
26 words
A motor driven camera as defined in claim 12 wherein said gate circuit is further supplied with a signal which indicates that the shutter is open.
Claim 15
Dependent Claim
53 words
A motor driven camera as defined in claim 1 wherein a shutter release means for releasing the shutter upon receipt of a signal is selectively connected with said second signal generating means so that the shutter may be released upon completion of the shutter charge and the film feed to take successive pictures.
Claim 16
Dependent Claim
82 words
A motor driven camera as defined in claim 14 wherein a gate circuit is connected between said shutter release means and said second signal generating means, and the gate circuit is connected with a shutter release signal generating means which generates a signal upon depression of the shutter button, whereby the gate circuit operates to transmit the signal from said second signal generating means to said shutter release means only while the shutter release signal is being put into the gate circuit.
Claim 17
Dependent Claim
37 words
A motor driven camera as defined in claim 15 wherein a switch is connected between said gate circuit and said second signal generating means to manually connect the second signal generating means to said gate circuit selectively.
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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) | 1978-06-30 | 1978-12-30 | 1979-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-30 | 1982-12-30 | 1983-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-30 | 1986-12-30 | 1987-07-01 | $7700.00 | Window Closed / Lapsed |