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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Authors
Dates
2000-11-10—Published
1997-01-15—Filed