Balance-spring with altered outer curve

Details Balance-spring with altered outer curve Balance-spring with altered outer curve

2007-11-13

2007-11-13

Miska, Vit W (Department: 2833)

Horology: time measuring systems or devices

Oscillating or reciprocating means

Balance wheel type

C368S178000

Reexamination Certificate

active

11169912

ABSTRACT:
The balance-spring (1) includes a plurality of coils (3) of which the end (6, 8) of the outer curve (2) is rigidified by deformation in order to define accurately the setting point (7) of said balance-spring, said deformation being able to be achieved by bending the end (6) of the outer curve (2) through 90° in a plane perpendicular to the height of the balance-spring (1) or by folding down through 180° a portion of the end (8) of the outer curve (2) against the inner or outer face of said end (2).

REFERENCES:
patent: 1037741 (1912-09-01), Dudley
patent: 3550928 (1970-12-01), Antritter
patent: 3872663 (1975-03-01), Meitinger
patent: 3955809 (1976-05-01), Hara et al.
patent: 5294097 (1994-03-01), Thomsen et al.
patent: 327 796 (1958-02-01), None

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