Blade type shutter

Details Blade type shutter Blade type shutter

1986-09-23

1988-04-12

Mathews, A. A.

354249, G03B 940

Patent

active

047378085

ABSTRACT:
A blade type shutter adapted for use in photographic cameras and so forth comprising: a front curtain assembly having at least one front blade arranged to travel in linked relationship with two front curtain arms; and a rear curtain assembly having at least one rear blade arranged to travel in linked relationship with two rear curtain arms. This shutter further includes a spring capable of generating a force in the direction in which the spring is opened. This spring presses one of the front curtain arms in the direction in which it travels during an aperture opening operation while applying a load to one of the rear curtain arms in the direction reverse to that in which it travels in a shutter closing operation.

REFERENCES:
patent: 4114174 (1978-09-01), Onda et al.
patent: 4220409 (1980-09-01), Inoue
patent: 4231650 (1980-11-01), Saito et al.
patent: 4245905 (1981-01-01), Takayama

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