Patent · US Active

Method of fabricating a timepiece balance spring assembly in micro-machinable material or silicon

US8757868B2 · kind B2 · utility

3Cited by

6References

12Claims

0Family size

Assignee

Montres Breguet S.A. · CH

Inventors

Nakis Karapatis · Premier, CH
Pierre Cusin · Yverdon-les-Bains, CH

Key dates

Filing date	Jun 20, 2011
Grant date	Jun 24, 2014
Priority date	—
Expiry date	Oct 22, 2032

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/49609
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method of fabricating a balance spring assembly (1) in silicon including a hairspring (2) made in a wafer of given crystalline orientation, in a plane (P). The volume of the assembly (1) is broken down into sub-components, inscribed in parallelepiped prisms, in secant pairs, at the junction areas, perpendicular to each other, each made in a wafer selected for the thickness or crystalline orientation thereof. An outer curve (4) is made in an orthogonal plane to that of the hairspring (2) joining it directly to a point in space, the projection of which into the plane (P) is located external to the hairspring (2). The sub-components are assembled at the junction areas.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.