Electromagnetically controlled shutter

Details Electromagnetically controlled shutter Electromagnetically controlled shutter

1979-08-17

1981-12-22

Hix, L. T.

354 51, 354235, G03B 708, G03B 908, H02K 4100

Patent

active

043067883

ABSTRACT:
An electromagnetic actuating device for controlling the opening and closing operation of a shutter includes a plurality of plate-like permanent magnets and yokes alternating in layers to form a plurality of magnetic paths, and a moving coil arranged to be movable in a space provided in said magnetic paths. The device is thus minimized in bulk and size, can be built into the shutter casing, and rendered operable with electrical energy consumption kept to a minimum.

REFERENCES:
patent: 3724350 (1973-04-01), Mielke
patent: 3816777 (1974-06-01), Metzgar
patent: 4100558 (1978-07-01), Koike et al.

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