Light shielding device for automatic focus detecting

Details Light shielding device for automatic focus detecting Light shielding device for automatic focus detecting

1980-02-05

1982-02-09

Gellner, Michael L.

354 59, G03B 300, G03B 7099

Patent

active

043147470

ABSTRACT:
A light-shielding device for a single lens reflex automatic focus camera in which the focus detecting element is normally covered by a shielding plate. The protecting plate is coupled along one edge thereof to a shaft while the end is coupled to one end of an operating lever. The other end of the operating lever is coupled through a U-shaped spring to a mirror operating lever of the camera wherein the U-shaped spring provides a snap action upon release of the shutter curtain which quickly moves the shielding plate to its uncovered position.

REFERENCES:
patent: 4075640 (1978-02-01), Weda et al.
patent: 4110765 (1978-08-01), Miyata et al.
patent: 4180312 (1979-12-01), Schmidt et al.

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