Film counter

Details Film counter Film counter

1975-02-03

1977-05-03

Hix, L. T.

Registers

Coded record sensors

Particular sensor structure

235 92MP, 340221, 354289, G03B 1736

Patent

active

040218287

ABSTRACT:
An electrical film counter for a photographic camera is provided with a differentiating circuit responsive to a film winding operation for producing an output pulse. The number of output pulses from the differentiating circuit is counted by an UP-DOWN counter and is decoded by a decoder designed to drive an indicator which indicates the number of film frames advanced through the film gate of the camera.

REFERENCES:
patent: 3346725 (1967-10-01), Allured et al.
patent: 3511153 (1970-05-01), Steisslinger et al.
patent: 3882512 (1975-05-01), Lawrence et al.

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