Title:
EXPOSURE CONTROL MEANS
Document Type and Number:
Japanese Patent JPS5225629
Kind Code:
A
Abstract:
PURPOSE: To enable a shutter actuation with no delay time with a little electric power by actuating a shutter blade with an electromagnetic magnet which changes its polarity for a period of time corresponding to the brightness of an object.
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Inventors:
IWATA HIROSHI
YAMAOKA TETSUO
YAMAOKA TETSUO
Application Number:
JP10141275A
Publication Date:
February 25, 1977
Filing Date:
August 20, 1975
Export Citation:
Assignee:
WEST ELECTRIC CO
International Classes:
G03B7/083; G03B9/10; G03B9/58; (IPC1-7): G03B7/08; G03B9/58
Domestic Patent References:
| JPS5081137A | 1975-07-01 |