Lens shield actuated auto/manual focus control inhibit/override

Details Lens shield actuated auto/manual focus control inhibit/override Lens shield actuated auto/manual focus control inhibit/override

1977-10-03

1979-05-08

Hix, L. T.

354288, 354289, G03B 300, G03B 1702

Patent

active

041539036

ABSTRACT:
In a variable focus lens system in general, or in a photographic camera having such a system in particular, a simplified, compact, combination manual and automatic focus conrol system is provided having manual and distance responsive automatic focus controls that are coupled to one another in a driving relationship. Included with said focus control system is a displaceable cover that impedes access to the actuator of said manual focus control to prevent simultaneous manual and automatic focus control actuation. Cover movement is accomplished by rotating a light shielding collar member that is mounted for rotation about the principal image forming axis of said variable focus lens system, said cover being coupled to said collar for movement therewith.

REFERENCES:
patent: 3224351 (1965-12-01), Strasser
patent: 3482500 (1969-12-01), Thomas
patent: 3522764 (1970-08-01), Biber
patent: 3683777 (1972-08-01), Miyagawa
patent: 3834796 (1974-09-01), Komine
patent: 3871756 (1975-03-01), Stieringer
patent: 3940777 (1976-02-01), Komine
patent: 4005460 (1977-01-01), Mizukawa
patent: 4057327 (1977-11-01), Kumazawa

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