Patent
1979-10-17
1981-06-23
Gonzales, John
354266, G03B 908
Patent
active
042747279
ABSTRACT:
This invention relates to an electronic shutter of a camera provided with a fail-safe system. An electromagnet is connected to the output of an electronic delay circuit. An armature lever moves in the direction to separate from the electromagnet to effectuate the shutter closing operation when the electromagnet is demagnetized. A shutter regulating member starts operation as it is released from restraint in connection with a shutter release operation to cancel a force pressing the armature lever against the electromagnet and to effectuate the shutter opening operation. A stopping means is provided for the shutter regulating member and the armature lever. The stopping means is capable of interrupting the movement of the shutter regulating member and the armature lever before the shutter opening and the shutter closing operation is started. The stopping means interrupts the movement of the shutter regulating member and the armature lever when the electromagnet is not magnetized normally so that the shutter will not be operated. The armature lever is externally operative by means of an operating member. The shutter can be manually operated by means of the operating member.
REFERENCES:
patent: 3947858 (1976-03-01), Ishida
patent: 4024553 (1977-05-01), Maitani et al.
Nemoto Ichiro
Onda Eiichi
Adams Bruce L.
Burns Robert E.
Gonzales John
Lobato Emmanuel J.
Seiko Koki Kabushiki Kaisha
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