Brazed bimetal external part of a timepiece
AssigneeThe Swatch Group Research and Development Ltd
InventorDaniel Knuchel
Life of this patent
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Abstract
A method of manufacturing an external part of a timepiece, including: providing a metallic base made of a first material including titanium and/or a first titanium alloy; providing at least one metallic cover plate made of a second material, the second material including a second metal chosen from among gold or platinum, and/or a second alloy including at least gold or platinum, the at least one cover plate being of a thickness greater than or equal to 0.5 millimeters; brazing the cover plate onto the base with a braze material chosen for brazing titanium with gold or respectively platinum to form a bimetallic blank; and shaping the bimetallic blank to give the external part its final form.
Claims12
A method of manufacturing a watch case claw, comprising:
- providing a metallic base made of a first material which is titanium and/or a first titanium alloy, the base being cut from a sheet or board, with cutouts and through apertures so as to form a ladder-like structure with lateral support surfaces connected by cross-pieces;
- providing at least two metallic cover plates made of a second material, the second material includes a second metal chosen from among gold, platinum, palladium or silver, and/or a second alloy including at least gold or platinum or palladium or silver each of the cover plates being of a thickness greater than or equal to 0.5 millimeters;
- folding the cross-pieces to form stirrups;
- brazing the two cover plates onto the lateral support surfaces of the base to form a bimetallic blank;
- cutting a section of the bimetallic blank;
- and
- shaping the bimetal blank by deformation to give the watch case claw a final form thereof.
Dependencies are inferred from the claim text.