Electomagnetic rotary motion device and exposure control device

Details Electomagnetic rotary motion device and exposure control device Electomagnetic rotary motion device and exposure control device

1973-09-11

1976-07-27

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 39, 310268, H02K 2126

Patent

active

039719634

ABSTRACT:
Herein disclosed is an electromagnetic rotary motion device including permanent magnets establishing a pair of spaced concentric and coextensive circular or semicircular air gaps and a rotor unit including armatures which are movable in a circular path in and along the spaced air gaps in response to an electric control signal impressed thereon. A typical application of the rotary motion device is a diaphragm-assisted exposure control arrangement of an optical instrument, such as for example, a still camera, a cinema motion camera or a television camera, wherein the diaphragm is driven by the rotor unit for providing a degree of exposure which is optimum for the brightness of an object to be photographed or televised.

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