CPC G04B 17/066 (2013.01) [G04D 3/0041 (2013.01); G04D 3/0069 (2013.01)] | 12 Claims |
1. Method for manufacturing timepiece hairsprings comprising the following successive steps:
a) forming hairsprings in a wafer,
b) forming a thermal compensation layer on the hairsprings,
c) identifying the hairsprings having a stiffness within a predetermined range,
d) optionally, detaching the hairsprings identified in step c) from the wafer,
e) modifying the other hairsprings so that the stiffness of at least some of them is within the predetermined range,
f) detaching from the wafer these other hairsprings and, if they have not been detached in step d), the hairsprings identified in step c).
|