Mirror-shutter device in single-lens reflex camera

Details Mirror-shutter device in single-lens reflex camera Mirror-shutter device in single-lens reflex camera

1979-11-06

1981-03-03

Griffin, Donald A.

G03B 1912

Patent

active

042537541

ABSTRACT:
The mirror of a single-lens reflex camera is supported on a swinging leading shutter swung upward by a rotary solenoid, the mirror thus being moved upward from its viewfinding position to its picture taking position, an aperture for passing stroboscopic light to the camera film being formed between this shutter and a trailing shutter held in cocked state by a resiliently urged latch lever. The trailing shutter is then released and swings upward into aperture closing contact with the leading shutter, the two shutters then being lowered to their positions for viewfinding, at which the trailing shutter is again locked for the succeeding shutter operation. The trailing shutter has a stud member fixed thereto which is locked, in the lowered position of the trailing shutter, by the latch lever. A buttressing bracket is provided with which the stud member is brought into contact in its locked state for accurate positioning thereof thereby to assure regular release timing of the latch lever.

REFERENCES:
patent: 1352449 (1920-09-01), Harris
patent: 2356880 (1944-08-01), Pignone
patent: 3304848 (1967-02-01), Steisslinger et al.
patent: 3533343 (1970-10-01), Kobayashi et al.

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