Electric shutter

Details Electric shutter Electric shutter

1977-04-18

1978-11-28

Gellner, Michael L.

354129, 354258, G03B 916

Patent

active

041273265

ABSTRACT:
An electric shutter of a program type provided with a single actuating spring connected at one end with a shutter blade opening and closing lever and at the other end with a closing actuating member. One end of the actuating spring acts to open the shutter blades through the opening and closing lever and the other end acts to close the shutter blades through the closing actuating member and opening and closing lever so that the structure may be simplified and the shutter releasing operation may be made with a light force. A spring acting to press an armature lever against an electromagnet is so arranged as to lose its action when the closing actuating member is in an uncocked position. Further, this electric shutter is provided with a synchroswitch so arranged as to be closed after the lapse of a predetermined time after the shutter is released irrespective of the diaphragm aperture to be set so that a flash-photographing may be positively made.

REFERENCES:
patent: 3722392 (1973-03-01), Kitai

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