Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1978-06-26
1980-12-23
Hix, L. T.
Electrical generator or motor structure
Dynamoelectric
Rotary
354234, 310 14, G03B 708, G03B 900, H02K 4102
Patent
active
042407281
ABSTRACT:
Photographic camera shutter apparatus having at least one drivable control part arranged for reciprocation for controlling the photographic light admitted to the camera, e.g. a diaphragm aperture ring or a shutter blade ring, and an electromagnetic driving system for reciprocating the control part, including at least one corresponding assembly having opposed coacting reciprocally energizable electromagnetic field coils stationarily arranged in spaced apart relation and providing an intervening magnetic field space therebetween and movable permanent magnets arranged for reciprocation along such intervening field space in response to the corresponding energization of the stationary field coils and operatively connected for driving the control part in question concordantly for reciprocation thereof, whereby to control the photographic light admitted to the camera in dependence upon the energization of the field coils.
REFERENCES:
patent: 2654845 (1972-04-01), Fahlenberg et al.
patent: 3547016 (1970-12-01), Rentschler
patent: 3687042 (1972-08-01), Mizui et al.
patent: 4011569 (1977-03-01), Mashimo et al.
patent: 4062421 (1977-12-01), Weber
patent: 4079400 (1978-03-01), Kondo
patent: 4113359 (1978-09-01), Koike et al.
patent: 4121235 (1978-10-01), Fujita et al.
Stacklies Horst
Wiedmann Erwin
Hix L. T,.
March Arthur A.
Perkey William B.
Prontor-Werk Alfred Gauthier GmbH
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