Motor drive camera with synchronization system

Details Motor drive camera with synchronization system Motor drive camera with synchronization system

1978-10-24

1981-12-08

Hix, L. T.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

354214, 354289, 242186, 226 11, G03B 118, G03B 1718, B65H 2530

Patent

active

043044808

ABSTRACT:
A film advance error detection system for synchronizing the operation of shutter cocking and film winding mechanisms with a motor drive unit therefor. This system utilizes three transducers positioned adjacent the sprocket wheel, film perforations and rewinding spindle to pick up signals whose frequencies are related to their speeds. By processing the signals in combination with an output signal of a phase difference compensator, it is made possible to provide, in a selective manner, a display representative of the film advane error and reeling end in the winding and rewinding operations along with the automatic stoppage of rotation of the motor.

REFERENCES:
patent: 3519340 (1970-07-01), Vockenhuber et al.
patent: 3564219 (1971-02-01), Mutziger
patent: 3834648 (1974-09-01), Rose, Jr. et al.
patent: 3915407 (1975-10-01), Laydowicz et al.
patent: 3949856 (1976-04-01), Ulber et al.
patent: 3999197 (1976-12-01), Iwashita et al.
patent: 4001552 (1977-01-01), Muller

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