Method for fixing jewels in a watch movement part and device for implementing the same
AssigneeETA SA Fabriques d'Ebauches
InventorFriedrich Durand
Life of this patent
Estimating the term…
Abstract
The method consists in using a setting device for jewel holes or prismatic jewels including at least a reference plane, on which the jewel to be fixed is wedged, said plane including at least spatial positioning means for said jewel, such as studs or cavities. Once the jewel is set in place, it is secured to its housing by applying a laser beam to its edge, possibly with the addition of a fusible material.
Claims13
A method for fixing jewels in parts of a watch movement by laser beam by means of a setting device, said parts being provided in the upper surface with at least a housing whose wall delimits an opening having a contour fitted with a slight play to the contour of the jewel to be fixed and whose bottom is provided, at least partially with a through passage joining an opening in the lower surface, wherein it includes the steps of:
- a) providing the setting device with spatial positioning means for one or several jewels with respect to one or several reference planes of said setting device and means for wedging a part,
- b) wedging the part in which the jewel is to be set on the setting device,
- c) setting one or several jewels in the respective housings securing their spatial position in the part with the positioning means of the setting device,
- d) focusing and moving a laser beam tip on the points of abutment of the jewel against the wall of a housing, on the periphery of the opening of a housing or on a fusible material added around said opening so as to secure the jewel to the housing, and
- e) releasing and removing the part from the setting device.
A method according to any of the preceding claims, wherein the jewel spatial positioning means and the part wedging means are arranged in at least two different reference planes of the setting device.
A method for fixing jewels in housings arranged in a watch movement part, said housings including through passages, and said fixing being effected by means of laser beams, wherein it includes a setting device formed by at least a reference plane on which the part rests, spatial positioning means for the jewels and means for wedging said part.
Dependencies are inferred from the claim text.