Title:
一体構造型二重バランススプリング及びその製造方法
Document Type and Number:
Japanese Patent JP5280903
Kind Code:
B2
Abstract:
The spiral (21) has a collet (27) formed by patterns. One of the patterns is projected from a hairspring (23) and formed in a silicon based layer. The hairspring is coaxially mounted on the collet. Another pattern is extended into another silicon based layer so as to be coaxial with another hairspring (25) for forming the monoblock double spiral in silicon based material. The hairspring (23) made of silicon based material is oxidized. An internal spire of one of the hairsprings is provided with a Grossmann curve. An independent claim is also included for a method for fabricating a double spiral.
Inventors:
Pierre-Andre Buehler
Marco Velard
Thierry Cornus
Jean-Philip Thiebaud
Jean-Bernard Peters
Pierre Cougin
Marco Velard
Thierry Cornus
Jean-Philip Thiebaud
Jean-Bernard Peters
Pierre Cougin
Application Number:
JP2009069979A
Publication Date:
September 04, 2013
Filing Date:
March 23, 2009
Export Citation:
Assignee:
Niva Rocks-Far Society Anonymous
International Classes:
G04B17/06; G04B17/22; G04B17/34
Domestic Patent References:
JP55101884A | ||||
JP2006507454A | ||||
JP2006516718A |
Foreign References:
EP1431844A1 | ||||
EP0732635A1 |
Attorney, Agent or Firm:
Masaki Yamakawa
Shigeki Yamakawa
Shigeki Yamakawa