Patent ID: 11913094
Assignee: NIVAROX-FAR S.A.
Field: Measurement (Instruments)
Classification: CPC C  G | IPC C  G

Claim 0:
1. A spiral spring configured to equip a balance of a horological movement, wherein the spiral spring is made of an alloy consisting of:
Nb;
Ti; and
V and/or Ta;
optionally, Zr;
optionally, Hf;
optionally, W;
optionally, Mo; and
optionally O, H, C, Fe, N, Ni, Si, Cu, and/or Al,
wherein a Ti content is at least 15 wt. %,
wherein a total content of the Nb, V, and Ta is in a range of from 40 to 85 wt. %,
wherein a total content of the Ti, Zr, and Hf is in a range of from 15 to 55 wt. %,
wherein a W content is in a range of from 0 to 2.5 wt. %,
wherein a Mo content is in a range of from 0 to 2.5 wt. %,
wherein a content for each of O, H, C, Fe, N, Ni, Si, Cu, and Al in a range of from 0 to 1600 ppm,
wherein a sum of the O, H, C, Fe, N, Ni, Si, Cu, and Al, is less than or equal to 0.3 wt. %, and
wherein the spiral spring has a modulus of elasticity of at least 110 GPa.