Release switch apparatus

Details Release switch apparatus Release switch apparatus

1990-12-03

1991-12-10

Gellner, Michael L.

G03B 1738

Patent

active

050722484

ABSTRACT:
A release switch apparatus having a release button which is supported in a camera body so as to move between an initial position and a specific operational position in which the release button is pushed down. The apparatus includes a light emitter provided in the release button or in the vicinity thereof and an emission controller for causing the light emitter to emit light when the release button is moved from the initial position. A light receiver is provided in the camera body or in the release button to receive light emitted from the light emitter, and a controller is provided which operates in response to the output to the light receiver.

REFERENCES:
patent: 4529291 (1985-07-01), Mizogui
United Kingdom Search Report, Application No. 9026139.7, Jan. 22, 1991.
English abstract of Japanese Application No. 62-145232.
French Search Report and Annex. Application No. FR9015021, Sep. 6, 1991.

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