Lens barrel for photographic cameras

Details Lens barrel for photographic cameras Lens barrel for photographic cameras

1975-08-06

1976-07-20

Corbin, John K.

354195, G02B 704

Patent

active

039703703

ABSTRACT:
A lens barrel for a photographic camera including a focussing device. An outer barrel is attached to the body of the camera and an inner barrel loosely fits within the outer barrel. This inner barrel is rotatable together with the objective lens by adjustment of the focussing device. A helical cam surface is provided at the end of the inner barrel. A back adjusting member is adjustably arranged on the outer barrel so that it contacts the helical cam surface and serves to move the inner barrel along the axial direction with respect to the outer barrel in response to an adjustment. A spring member biases the inner barrel in the direction of the helical cam surface for urging it against the back adjusting member.

REFERENCES:
patent: 2357326 (1944-09-01), Harris
patent: 3897998 (1975-08-01), Someya et al.

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