Blade type focal plane shutter

Details Blade type focal plane shutter Blade type focal plane shutter

1978-12-14

1980-11-04

Hix, L. T.

354252, G03B 940

Patent

active

042316502

ABSTRACT:
A blade type focal plane shutter wherein an auxiliary arm is always biased with a spring so that backlashes at pivotably connecting points between a driving arm and shutter blades and between the auxiliary arm and shutter blades may not have a bad influence on the shutter opening and closing motions. This focal plane shutter is provided with a braking lever which can catch a closing driving lever to prevent a bound from being caused when the motion of the shutter blades for exposure ends.

REFERENCES:
patent: 2533450 (1950-12-01), Fuerst
patent: 3646870 (1972-03-01), Koleff et al.
patent: 3840885 (1974-10-01), Yoshizaki
patent: 3946413 (1976-03-01), Onda et al.
patent: 4054891 (1977-10-01), Onda et al.
patent: 4109266 (1978-08-01), Inoue
patent: 4110772 (1978-08-01), Nakagawa et al.

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