Locking mechanism for interchangeable pentaprism view finder in

Details Locking mechanism for interchangeable pentaprism view finder in Locking mechanism for interchangeable pentaprism view finder in

1974-09-13

1976-03-09

Wintercorn, Richard A.

354219, G03B 1912

Patent

active

039435334

ABSTRACT:
A single lens reflex camera of the interchangeable view finder type includes a pentaprism view finder having a casing provided with opposite followers slideably engaging grooves in parallel tracks on the camera body top wall. A lock element is mounted on a swingable arm carried by the view finder casing and is spring urged into locking engagement with a recess in one of the tracks. The view finder occular is provided with a coaxial collar rotatably supporting an unlock ring having a pin projecting through a slot into the casing and connected by a lost motion coupling to one end of a link which is connected to the swingable arm so rotation of the ring disengages the lock element from the lock recess.

REFERENCES:
patent: 3828644 (1974-08-01), Uchida

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