Securing device for the outer end of the hair-spring of a timepi

Details Securing device for the outer end of the hair-spring of a timepi Securing device for the outer end of the hair-spring of a timepi

1976-05-24

1977-11-01

Schaefer, Robert K.

58109, G04B 1732

Patent

active

040559440

ABSTRACT:
A securing device which permits the outer end of the hair-spring in a timepiece to be fastened either by gluing or pinning it in place. A U-shaped arm extends radially of the axis of the balance wheel and provides a pair of ears, one for gluing the hair-spring and the other for pinning it. The manufacturer of the watch can thus use the ear for gluing the outer end of the hair-spring, as this method has advantages for production purposes. When the hair-spring is replaced, the watch-repairman can use the other ear for pinning the outer end of the hair-spring without deforming the hair-spring, thereby obtaining the advantages of this method for repair purposes.

REFERENCES:
patent: 3154912 (1964-11-01), Pinkas
patent: 3328955 (1967-07-01), Schneider
patent: 3943701 (1976-03-01), Poix

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