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AssigneeMontres Breguet S.A.
InventorsPierre-André Buhler, Marco Verardo, Thierry Conus, Jean-Phillipe Thiebaud, Jean-Bernard Peters, Pierre Cusin
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The invention relates to a one-piece hairspring (21, 21′) including, a balance spring (25, 25′) coaxially mounted on a collet (27, 27′), made in the same layer of silicon-based material. According to the invention, the hairspring includes an elevation device (2, 2′) for the outer coil of the balance spring above the layer of silicon-based material so as to improve the concentric development of the hairspring. The invention also relates to a timepiece including a hairspring of this type and the method of manufacturing the same. The invention concerns the field of timepiece movements.
A one-piece hairspring comprising a balance spring coaxially mounted on a collet, wherein the balance spring and the collet are made in a first layer of silicon-based material, wherein the balance spring includes an elevation device for an outer coil of the balance spring, and wherein the elevation device is located above said the first layer of silicon-based material so as to improve the concentric development of the hairspring.
A one-piece hairspring comprising a balance spring coaxially mounted on a collet, wherein the balance spring and the collet are made in a first layer of silicon-based material, wherein the balance spring includes an elevation device for an outer coil of the balance spring, and wherein the elevation device is located above said the first layer of silicon-based material so as to improve the concentric development of the hairspring, wherein the elevation device includes elevation means connecting the outer coil of the balance spring, which are made in a second layer of silicon based material, and wherein the elevation device further comprises a second balance spring coaxially mounted on a second collet, wherein the second balance spring is connected to the elevation means and the second balance spring and the second collet are formed in a third layer of silicon based material for forming a double series hairspring.
Dependencies are inferred from the claim text.