Balance wheel assembly and method for manufacture thereof
AssigneeOMEGA Louis Brandt & Frere S.A.
InventorRene Bornand
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Abstract
A balance wheel assembly includes a balance staff having a balance wheel hub, a saddle, a shoulder, a cylindrical portion to which the balance spring is attached, and a lower stem extending through a flange. The saddle and cylindrical portion are on the same side of the hub with the shoulder being on the opposite side of the hub and spacing the flange from the hub. The balance spring is attached directly to the cylindrical portion of the balance staff.
Claims7
In a balance wheel assembly including a balance wheel, a balance staff having a shoulder, a balance spring, and a flange which rotates relative to the balance staff, said balance staff including a saddle and a hub for the balance wheel, the improvement wherein said balance wheel hub and the plane of the balance spring are arranged on opposite sides of said saddle, and the flange is completely disengaged from the hub by said shoulder, and wherein the interior end of the balance spring is fastened directly to the balance staff without any intermediate component.
Dependencies are inferred from the claim text.