Electrical contact arrangement for photographic camera with inte

Details Electrical contact arrangement for photographic camera with inte Electrical contact arrangement for photographic camera with inte

1983-12-02

1985-12-17

Perkey, William B.

3542711, G03B 1700

Patent

active

RE0320498

ABSTRACT:
A camera body having a camera body and an interchangeable lens engageable with the camera body has an improved contact arrangement between camera body and lens. A lens mount has a first flat surface, a camera mount engages a lens mount to join the lens to the camera body, and the camera mount has a second flat surface abutting the first flat surface when the lens mount engages the camera mount. One or more first electrical contacts in the lens mount are movable normal to the first surface between a retracted position approximately flush with the first surface and an extended position projecting from the first surface. A spring urges the one or more first contacts toward the extended position. One or more stationary second electrical contacts in the camera mount open toward the second surface without protruding therefrom in alignment with the respective one or more first contacts when the lens mount engages the camera mount so the one or more first contacts normally bear against the respective one or more second contacts. A manually actuated device retracts the one or more first contacts into a position spaced from the respective one or more second contacts. The lens mount and the camera mount are electrically conductive so the manually actuated device connects and disconnects the one or more first contacts electrically to and from the lens mount to make and break electrical contact between the one or more second contacts and the mounts.

REFERENCES:
patent: 3762295 (1973-10-01), Kitai
patent: 4104649 (1978-08-01), Tanaka et al.

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