Electromagnetically driven shutter device

Details Electromagnetically driven shutter device Electromagnetically driven shutter device

1980-12-31

1982-10-12

Hix, L. T.

354147, 354234, G03B 908, G03B 1503

Patent

active

043536328

ABSTRACT:
In the disclosed device, an electromagnetic drive source in the form of a stator and rotor opens and closes shutter blades. A magnet sensor senses the displacement phase of the rotor, or any member operated by the rotor, to produce a timing signal at a predetermined position of the shutter during exposure. According to an embodiment of the invention, the timing signal is used for synchronizing a flash unit and the sensor is a reed switch.

REFERENCES:
patent: 3635141 (1972-01-01), Starp et al.
patent: 4286854 (1981-09-01), Seckendorf

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