Horological assembly comprising a balance spring and a stud
AssigneeETA SA Manufacture Horlogere Suisse
InventorJulien Christan
Life of this patent
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Abstract
An assembly (1) for attaching a free end (8) of an outer last coil (10) of a balance spring (12) for a horological movement, this attachment assembly (1) including a stud (2) and a blocking element (14), the stud (2) being provided with a groove (6) in which the free end (8) of the outer last coil (10) of the balance spring (12) is engaged, the blocking element (14) also being engaged in the groove (6), in contact with the outer last coil (10) of the balance spring (12), the attachment assembly (1) further including a clamping member (16) which presses the blocking element (14) against the free end (8) of the outer last coil (10) of the balance spring (12), such that the free end (8) of the outer last coil (10) of the balance spring (12) is immobilised in the groove (6) of the stud (2).
Claims16
An assembly (1) for attaching a free end (8) of an outer last coil (10) of a balance spring (12) for a horological movement, the attachment assembly (1) comprising a stud (2) and a blocking element (14),
- the stud (2) being provided with a groove (6) in which the balance spring (12) is engaged at a point along its length, and a bottom (46) that is separated by the groove (6) in a first direction (Z) that is perpendicular to a plane in which a winding of the coils lies,
- the blocking element (14) being elastically engaged with the stud (2) in the groove (6), and being in contact with the balance spring (12),
- the attachment assembly (1) further comprising a clamping member (16) which presses the blocking element (14) in the first direction (Z) against the balance spring (12) and the bottom (46), such that the balance spring (12) is immobilised in the groove (6) of the stud (2) in the first direction (Z).
Dependencies are inferred from the claim text.