Single lens reflex camera

Details Single lens reflex camera Single lens reflex camera

Filed on

1975-11-03

Date issued

1977-08-09

Examiner

Hix, L. T.

Other Related Categories

354156, 354219, G03B 1912

Type

Patent

Status

active

Patent number

040415090

Description

ABSTRACT:
A single lens reflex camera having a mirror and mechanism for driving the mirror. The mirror is mounted on an end plane of a lever pivotally supported on a shaft mounted in the body of the camera. The shaft extends substantially in parallel with the axis of a picture-taking optical path for the objective lens of the camera. By pivoting the lever, it can be moved out of the optical path. The lever is movable between a viewing position, a first position, in which the mirror is positioned along the optical path at an angle of 45.degree. with the path, and a picture-taking position, a second position, in which the mirror is completely retracted from the optical path. A mirror operating mechanism is provided for shifting the lever and the mirror from the first position to the second in response to a shutter releasing operation. A mirror returning mechanism subsequently returns the lever and the mirror from the second position back to the first in response to the completion of an exposure operation by the shutter.

REFERENCES:
patent: 1807613 (1931-06-01), Bauersfield et al.
patent: 2579247 (1951-12-01), Angenieux
patent: 3391626 (1968-07-01), Ettischer et al.
patent: 3468232 (1969-09-01), Knapp
patent: 3733988 (1973-05-01), Tenne
patent: 3911454 (1975-10-01), Ohmori

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