Camera with built-in electric wind-up mechanism

Details Camera with built-in electric wind-up mechanism Camera with built-in electric wind-up mechanism

1979-09-18

1981-01-27

Gellner, Michael L.

354289, G03B 112, G03B 1718

Patent

active

042471893

ABSTRACT:
A camera performing a film winding action with an electric wind-up mechanism and producing a winding completion signal upon completion of each film winding action. A counter and a discriminating circuit are reset by a back cover closing signal produced when a back cover of the camera is closed to have the counter count the winding completion signals. When both the winding completion signal and an output signal of the discriminating circuit representative of the initial state thereof are obtained, an electromagnetic release mechanism is automatically actuated to carry out an exposure action. Upon completion of the exposure action, the film winding action of the electric wind-up mechanism is performed. When the counter has counted a predetermined count value, the discriminating circuit is inverted by a count output of the counter to automatically render the electromagnetic release mechanism inoperative.

REFERENCES:
patent: 4071851 (1978-01-01), Johnson
patent: 4201463 (1980-05-01), Haregaya et al.

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