Hairspring and collet assembly for timepieces
AssigneeETA A.G. Ebauches-Fabrik
InventorsPierre-Alain Vuille, Eric Favre, Friedrich Perrot
Life of this patent
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Abstract
A hairspring and collet assembly for timepieces in which the collet has a base having an opening and a stud integral from the base in a direction parallel to the axis of the opening. The hairspring comprises an inner turn ending in a bend. The stud occupies a portion of the base extending between the opening and the periphery of the base. The non-deformed portion of the inner turn of the hairspring is secured to the stud and the bend extends freely away from the stud about the opening.
Claims13
A hairspring and collet assembly for timepieces in which said collet is composed of a base having an opening adapted for engagement on a balance-staff and of a stud integral with said base and projecting from a face of said base in a direction parallel to the axis of said opening, wherein said hairspring comprises an inner turn ending in a bend, said stud occupies a portion of the surface of said base extending between said opening and the periphery of said base and comprises a lateral surface for receiving said hairspring, and said assembly comprises fixing means for securing a non-deformed portion of said inner turn to said lateral surface, the end of said inner turn and said bend extending freely away from said stud about said opening.
Dependencies are inferred from the claim text.