Exposure control device for camera

Details Exposure control device for camera Exposure control device for camera

1984-03-27

1986-01-14

Perkey, William B.

354230, 3542341, 3542711, G03B 300, G03B 906, G03B 914

Patent

active

045642788

ABSTRACT:
An exposure control device for use with a camera provided with two objective lenses having different focal lengths which are selectively used includes two exposure control elements which are disposed in front of and facing the two objective lenses, respectively, and simultaneously driven by a common drive. The light passed through the respective exposure control elements which is selected by an optical path changer is allowed to reach a film. The exposure control elements are diaphragms which allow the admission of light to the objective lenses. A pivotal arm has at least one pin at at least one end that engages in a slot in each of the diaphragms. Another end of the arm carries an armature that can be moved by at least one electromagnet and that is urged toward an intermediate position by a spring.

REFERENCES:
patent: Re25925 (1965-12-01), Hautmann
patent: 2956491 (1960-10-01), Fischer et al.
patent: 3074336 (1963-01-01), Hinden
patent: 3848985 (1974-11-01), Bennett

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