Method of manufacturing a pallet lever and pallet lever made by this method
AssigneeETA A.G. Ebauches-Fabrik
InventorUrs Giger
Life of this patent
Estimating the term…
Abstract
A pallet lever which is made by first stamping regions, the surfaces of which will be working surfaces and thereafter blanking out the shape of the lever to dimensions in excess of the area of the stamped portion so that the working surfaces of the stamped portion are protected against surface damage to the blanking out operation.
Claims15
In a method of manufacturing a pallet lever for a timepiece movement of the type wherein a lever body is formed in one piece with active elements having functional faces intended to cooperate with an escape wheel and an impulse pin, respectively, the improvement comprising the steps of:
- forming from a plane metal plate by stamping, a plurality of blocks projecting from one plane face of that plate, and constituting active elements, and,
- thereafter blanking said lever body along an outline passing outside the contours of said blocks at least at the locations of the functional faces thereof.
A timepiece pallet lever comprising a one-piece lever body provided with means for pivoting about an axis, said lever body comprising a blanked plate and blocks stamped to project from one face of said plate, said blocks constituting active elements having functional faces, said functional faces of said active elements extending parallel to said pivoting axis of said lever body and being set back from the edge of said plate.
Dependencies are inferred from the claim text.