Motion picture camera with improved frame count indicator

Details Motion picture camera with improved frame count indicator Motion picture camera with improved frame count indicator

1975-08-22

1976-08-31

Hayes, Monroe H.

Optics: motion pictures

Camera and/or projector drive mechanisms

With indicating means

352172, G03B 160

Patent

active

039777766

ABSTRACT:
Pulses are furnished which each indicate transport of a frame. The pulses are counted on a BCD counter. Selected outputs of the counter are connected to the inputs of coupling stages, each including a JK flip-flop. Each flip-flop changes state for a predetermined count on the counter. When each flip-flop changes state, a corresponding indicator lights up, thereby furnishing an indication to the photographer of how many frames have been transported.

REFERENCES:
patent: 3205507 (1965-09-01), Hochstein
patent: 3782813 (1974-01-01), Isono

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