Title:
時計用テンプ輪スプリングの保護装置
Document Type and Number:
Japanese Patent JP5391163
Kind Code:
B2
Abstract:
The device has a disk with high magnetic permeability, arranged in a plane parallel to a plane of a balance spring. The disk and the balance spring are mounted coaxially with each other while allowing magnetic field to reach the balance spring in a direction of the magnetic field. A ring (3) with the high magnetic permeability is mounted on the disk. The ring is arranged around the balance spring in a coaxial manner. The disk is made to fit with a set of branches (4) made of the same material as the disk and arranged in a star-form.
Inventors:
Jean-Pierre Migno
Jean-Jack Bourne
Jean-Jack Bourne
Application Number:
JP2010182193A
Publication Date:
January 15, 2014
Filing Date:
August 17, 2010
Export Citation:
Assignee:
The Swatch Group Research and Development Limited
International Classes:
G04B43/00
Domestic Patent References:
| JP58129190U | ||||
| JP56103886U |
Foreign References:
| DE19651320A1 | ||||
| US3002138 |
Attorney, Agent or Firm:
Masaki Yamakawa
Shigeki Yamakawa
Yuzo Koike
Shigeki Yamakawa
Yuzo Koike