Support structure for the aperture signal transmitting means in

Details Support structure for the aperture signal transmitting means in Support structure for the aperture signal transmitting means in

1980-12-12

1982-09-14

Griffin, Donald A.

350255, 354270, G03B 1700, G03B 902, G02B 702

Patent

active

043492657

ABSTRACT:
In an interchangeable lens assembly for a camera, the aperture signal transmitting means are formed to include an axially elongate portion for communication of exposure control signals between a diaphragm mechanism in the lens assembly and a control mechanism in the camera body, and an annular portion having grooves or recesses therein for engaging bearing balls. The support structure includes a barrel member which is part of the lens assembly and which also includes a groove or recess cooperative with the groove or recess in the signal transmitting member to support the balls with retainer means being provided for the bearing balls. The retainer means is arranged between the signal transmitting member and the barrel member and is configured with an annular shape with holes equally spaced thereabout in a circular pattern about the optical axis of the lens assembly to retain the balls rotatably within the holes.

REFERENCES:
patent: 2362603 (1944-11-01), Wittel
patent: 3090282 (1963-05-01), Angenieux
patent: 3864707 (1975-02-01), Shirasaki

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