Diaphragm and shutter mechanism

Details Diaphragm and shutter mechanism Diaphragm and shutter mechanism

1981-02-18

1982-08-17

Griffin, Donald A.

G03B 940

Patent

active

043446876

ABSTRACT:
In a camera, first and second blades are operable in a first mode as diaphragm and shutter blades, respectively, for effecting a first aperture-shutter speed combination and are operable in a second mode as shutter and diaphragm blades, respectively, for effecting a second aperture-shutter speed combination. A selector is movable to operate the first and second blades in either one of the two modes. The first aperture-shutter speed combination has a relatively low exposure value and the second aperture-shutter speed has a relatively high exposure value.

REFERENCES:
patent: 348301 (1886-08-01), Tisdel
patent: 516861 (1894-03-01), Fawcett
patent: 591347 (1897-10-01), Esmond
patent: T924007 (1974-07-01), Couture
patent: 2495224 (1950-01-01), Bodlander
patent: 3270646 (1966-09-01), Wilson
patent: 3479935 (1969-11-01), Harvey
patent: 3913112 (1975-10-01), Takahama
patent: 3946414 (1976-03-01), Kitai
patent: 4023192 (1977-05-01), Simon-Bathmann
patent: 4160588 (1979-07-01), Beach

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