Component for a timepiece movement
AssigneeNivarox-FAR S.A.
InventorsChristian CHARBON, Alexandre Fussinger, Marco Verardo
Life of this patent
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Abstract
The invention relates to a pivot arbor comprising a metal pivot (3) at each of its ends. The metal is a non-magnetic copper alloy in order to limit its sensitivity to magnetic fields, and at least the outer surface (5) of one of the two pivots (3) is deep-hardened to a predetermined depth with respect to the rest of the arbor to harden the pivot or pivots (3). The invention concerns the field of timepiece movements.
Claims17
A pivot arbor for a timepiece movement comprising at least one metal pivot at at least one of the ends thereof, wherein the metal is a non-magnetic copper alloy so as to limit the sensitivity of the pivot to magnetic fields, and wherein at least the outer surface of said pivot is deep-hardened to a predetermined depth relative to the core of the pivot arbor.
A movement for a timepiece comprising a pivot arbor, wherein said pivot arbor comprises at least one metal pivot at at least one of the ends thereof, the metal being a non-magnetic copper alloy so as to limit the sensitivity of the pivot to magnetic fields, and wherein at least the outer surface of said pivot is deep-hardened to a predetermined depth relative to the core of the pivot arbor.
A movement for a timepiece wherein the movement comprises a balance staff, a pallet staff and/or an escape pinion comprising a pivot arbor comprising at least one metal pivot at at least one of the ends thereof, the metal being a non-magnetic copper alloy so as to limit the sensitivity of the pivot to magnetic fields, and wherein at least the outer surface of said pivot is deep-hardened to a predetermined depth relative to the core of the pivot arbor.
A method for fabricating a pivot arbor for a timepiece movement comprising the following steps:
- a) forming a pivot arbor comprising at least one metal pivot at one of the ends thereof, said metal being a non-magnetic copper alloy, to limit the sensitivity thereof to magnetic fields;
- b) diffusing atoms to a predetermined depth in at least the outer surface of said pivot in order to deep-harden the pivot arbor in the main areas of stress while maintaining a high tenacity.
Dependencies are inferred from the claim text.