Iris diaphragm device for a camera

Details Iris diaphragm device for a camera Iris diaphragm device for a camera

1985-05-29

1986-05-13

Gellner, Michael L.

354274, G03B 906

Patent

active

045882762

ABSTRACT:
An iris diaphragm device for use in an automatic exposure cameras of various types comprises iris diaphragm leaves which are simultaneously opened or closed by rotational motion of a leaf operating disc and a drive element having a movable magnetic ring of a noncircular shape composed of near segments with pivot pins and remote segments and adapted to rotate the leaf operating disc. The mechanism for pivotally supporting the movable magnetic ring and transmitting the swinging motion of the movable magnetic ring to the leaf operating disc is mounted in the space left outside the near segments of the movable magnetic ring without the smallest strain, thereby preventing the lens barrel of the camera from being increased in size or protruding in part.

REFERENCES:
patent: 4460253 (1984-07-01), Kawai et al.

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