Shutter for a single lens reflex camera

Details Shutter for a single lens reflex camera Shutter for a single lens reflex camera

1988-12-20

1992-12-15

Adams, Russell E.

354439, G03B 708

Patent

active

051721589

ABSTRACT:
A camera shutter of the type in which a shutter blade is initially displaced from an open position, in which a shutter opening is open, to a closed position, in which the shutter opening is closed, prior to the exposure-taking operation includes an actuating member displaceable in shutter-opening and shutter-closing directions to actuate the shutter blade in opening and closing directions. A drive motor effects displacement of the actuating member in the shutter-opening and shutter-closing directions, and a biasing spring biases the actuating member in the shutter-opening direction thereby preventing accidental closing of the shutter blade in the event impacts are applied to the camera. A detection switch detects when the shutter blade is in the open position, the switch being responsive to displacement of the actuating member in the shutter-opening direction to detect the open position of the shutter opening.

REFERENCES:
patent: 3903528 (1975-09-01), Kee
patent: 3952312 (1976-04-01), Douglas
patent: 4176929 (1979-12-01), Ito et al.
patent: 4494846 (1985-01-01), Kurosu et al.

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