Extractable barrel-arbor

Details Extractable barrel-arbor Extractable barrel-arbor

1976-10-12

1978-03-07

Witkowski, Stanley J.

58 87, G04B 116, G04B 118, G04B 3100

Patent

active

040772012

ABSTRACT:
An improved extractable barrel-arbor for a watch movement is provided with first and second end cylindrical pivot bearing surfaces, and a central cylindrical surface containing a hook. The radius of the central surface is less than the radius of the first and second end cylindrical surfaces while the distance between the axis of the barrel-arbor and the outer hooking edge of the hook is equal to the radius of at least one of the first and second pivot bearing surfaces.

REFERENCES:
patent: 3846974 (1974-11-01), Giger
patent: 3852954 (1974-12-01), Bachmann

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