Self-compensating balance spring for a mechanical oscillator of

Details Self-compensating balance spring for a mechanical oscillator of Self-compensating balance spring for a mechanical oscillator of

1998-06-17

1999-03-09

Miska, Vit

Horology: time measuring systems or devices

Oscillating or reciprocating means

Balance wheel type

148501, 148672, G04B 1700, C21D 1100

Patent

active

058810269

ABSTRACT:
A self-compensating spring for a balance-spring for a balance-spring/balance assembly of a mechanical oscillator of a horological movement or of any other precision instrument, made of a paramagnetic Nb--Zr alloy containing between 5% and 25% by weight of Zr, obtained by cold rolling or cold drawing, and having a Young's modulus whose temperature coefficient (TCY) is adjustable by precipitation of Zr-rich phases in the Nb--Zr solid-solution. It contains at least 500 ppm by weight of an interstitial doping agent at least partly formed of oxygen.

REFERENCES:
patent: 3547713 (1970-12-01), Steinemann

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