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US 9,372,474 B2Granted
External piece for a timepiece and system of manufacturing the same
AssigneeComadur SA
InventorsJean-Paul Tassetti, Gilles Derriey, Patrice Dumont
Life of this patent
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Abstract
An external piece for a time piece and a method of manufacturing the same, including a top surface and a bottom surface. At least one of the faces includes a longitudinal curvature and a transverse curvature that are different.
Claims13
A system of manufacturing an external piece for a timepiece comprising:
- a securing device including a drum, rotatably mounted along a first axis, and an inner circumferential wall or an outer circumferential wall of the drum carrying at least one blank of the piece;
- and
- a machining device comprising an abrasive structure rotatably mounted along a second axis and configured to machine the at least one blank to form a first curvature,
- wherein the machining device further includes a mechanism to move the second axis so that the machining device is movably mounted along a curved directrix to selectively form a second curvature in the at least one blank while the machining device is machining the first curvature, and
- wherein the first axis and the second axis are perpendicular so that machining lines intersect.
2 more elements
Dependencies are inferred from the claim text.