Motor drive device for a camera

Details Motor drive device for a camera Motor drive device for a camera

1979-03-16

1980-10-21

Griffin, Donald A.

354213, 354214, G03B 118

Patent

active

042290910

ABSTRACT:
A motor wind up device which is automatically stopped after completion of photography of a roll of film in a camera. A control circuit of the motor controlling the wind up operation is changed over from a stop state to a wind up state by means of a signal produced when the shutter has run. When the motor is once stopped when over-torque is detected at the termination of the film to carry out the release operation, no shutter operation signal is produced because the shutter has not yet been completely wound up so that the motor will not run. When the film is terminated at the beginning of wind up operation, the device prevents the production of a false shutter operation completion signal even if the shutter does not run.

REFERENCES:
patent: Re29505 (1977-12-01), Aizawa et al.
patent: 3688669 (1972-09-01), Ogiso et al.
patent: 3719335 (1973-03-01), Kurasawa
patent: 3783762 (1974-01-01), Sugimori
patent: 3820140 (1974-06-01), Umeda
patent: 3981022 (1976-09-01), Iwashita et al.
patent: 3994003 (1976-11-01), Iwashita et al.
patent: 3999197 (1976-12-01), Iwashita et al.
patent: 4042942 (1977-08-01), Haraguchi
patent: 4054889 (1977-10-01), Tsujimoto

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