Patent ID: 9164484
Filing Date: 2015-10-20
Classification: G04B

Abstract:
1. A timepiece assembly comprising: at least one balance spring stud including an attachment to a plate or to a bridge; at least one timepiece balance spring including at least one strip wound into coils between an inner end and an outer end, said inner end fixed to a collet being pivotally movable about a pivot axis, and said outer end being fixed to said balance spring stud; wherein at least one of said balance spring stud and said collet includes a braking structure arranged to cooperate with at least a first coil of said coils during accelerations due to contraction or extension of said balance spring which are higher than set values, to modify a resulting rigidity of said balance spring when a number of active coils thereof is modified by locally coupling at least said first coil to said braking structure; wherein said collet includes at least a first inner lip and at least a second outer lip each including said braking structure.