Sound preventing means in sliding lens barrel and method of manu

Details Sound preventing means in sliding lens barrel and method of manu Sound preventing means in sliding lens barrel and method of manu

1985-03-29

1987-06-30

Corbin, John K.

350429, G02B 704

Patent

active

046766006

ABSTRACT:
A lens mount arrangement in which at least a pair of sliding cylindrical barrels are slidable relative to one another, which lens mount is manufactured using an inexpensive and simple process, yet the amount of sound generated during a sliding movement is significantly reduced. In accordance with an important feature of the invention, machining lead angles of the pair of sliding cylindrical surfaces are made different from each other. The lead angles may be made different in direction, or they can have the same direction but differ by at least 10.degree. from one another.

REFERENCES:
patent: 3233514 (1966-02-01), Eberhardt
patent: 3876290 (1975-04-01), Back

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