1973-09-07
1976-03-23
Hix, L. T.
354171, 354206, G03B 112
Patent
active
039464091
ABSTRACT:
A motor drive system for a camera, including a reversible motor, means for transmitting the revolutions of the motor to a film advance and shutter charge shaft, a control circuit for selecting the operating condition of the motor including forward revolution, reverse revolution and stop, means for delivering a film advance start signal to the control circuit, and torque detector means for detecting a torque applied to the rotary shaft of the motor indicating completion of the film advance, the control circuit being responsive to the torque detector means to initiate reverse revolution of the motor. The control circuit includes at least one flip-flop circuit, a gate circuit having an input coupled to an output of the flip-flop circuit, and two relays connected with the output terminals of the gate circuit and the flip-flop circuit to control the motor. There is further provided a switch which is responsive to the rotation of the film advance and shutter charge shaft to open when the shaft is in a predetermined position and close in all other positions of the shaft. The switch de-energizes the motor when the operation cycles are completed.
REFERENCES:
patent: 3448669 (1969-06-01), Suzuki
patent: 3598034 (1971-08-01), Suzuki
patent: 3613542 (1971-10-01), Wiessner et al.
patent: 3688669 (1972-09-01), Ogiso et al.
patent: 3710705 (1973-01-01), Kimura
patent: 3800310 (1974-03-01), Umeda
Adams, Jr. Russell E.
Hix L. T,.
Nippon Kogaku K.K.
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