DEVICE INDICATING PRESENCE OF FILM IN FILM-PULLING PATH OF PHOTOGRAPHIC CAMERA Russian patent published in 2000 - IPC

Abstract RU 2158950 C2

FIELD: photography. SUBSTANCE: device indicating presence of film has photoelectric sensor, amplifier-former, two frequency dividers, circuit expanding length of pulse, two electric motors of film rewinding, pulse generator, pulse former, two coincidence circuits, units of flip-flops, OR gates, AND gates, delay circuits, electron keys, of control over pressing table, counter, decoders, of commutation, master units and of indication, two power amplifiers and two time relays. EFFECT: reduced consumption of aerial photography film while correct functioning of film-pulling path of aerial camera is tested. 1 dwg

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RU 2 158 950 C2

Authors

Ageev I.M.

Astakhov N.B.

Prokhorov V.P.

Dates

2000-11-10Published

1997-01-15Filed