Hairspring for a balance wheel/hairspring resonator
AssigneeRolex SA
InventorsJérôme Daout, Richard Bossart
Life of this patent
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Abstract
Hairspring for a balance wheel/hairspring resonator, comprising n blades, where n≧2, which are fastened via at least one of their respective homologous ends and wound in spirals with an angular offset capable of neutralizing the lateral forces liable to be exerted on its central arbor when one of the ends of each blade is moved angularly around said central arbor relative to its other end.
Claims16
A balance wheel/hairspring resonator, which comprises a balance wheel having a central arbor and a hairspring having n blades, where n≧2, wound around the central arbor, each blade having an inner end and an outer end, wherein the outer end is located farther from the central arbor than the inner end,
- wherein the inner ends of the blades are fastened to the central arbor in a homologous manner with an angular offset of the internal ends about the central arbor,
- wherein the blades are coplanar, and
- wherein the blades are wound in spirals with an angular offset, so as to neutralize the lateral forces likely to be exerted on the central arbor when one of the ends of each blade is moved angularly about said central arbor relative to its other end.
Dependencies are inferred from the claim text.