Patent ID: 9304494
Filing Date: 2016-04-05
CPC Classification: G04B

Claim Text:
1. An assembly to hold or support a timepiece balance spring, the assembly including a balance spring stud and a stud-holder, the stud-holder comprising: a first housing to receive said balance spring stud; at least one screw to secure said balance spring stud, a longitudinal axis of the at least one screw being orthogonal to a longitudinal axis of said stud; and a securing mechanism to secure said stud-holder to an escapement mechanism, said balance spring stud including at least one orientation surface defining a direction of holding or supporting said balance spring, wherein said at least one screw at least partially passes through said balance spring stud to hold the stud in an indexed locking position, wherein said stud includes at least one internal thread cooperating with said at least one screw, said internal thread forming said orientation surface, and said stud-holder includes: a first bore for the passage of each said at least one screw; and a first bearing face abutted by a screw head comprised in said at least one screw, said bearing face being disposed at an entry of said first bore, on an opposite side to said first housing for said stud.