Title:
ROTARY SHAFT FOR ELECTRONIC WATCH
Document Type and Number:
Japanese Patent JPS53140468
Kind Code:
A
Abstract:
PURPOSE: To ensure excellent wear-proof characteristic and long life, by setting the hardness of the surface of a shaft in steel or Cu alloy to less than 300 Vicker's hardness by covering the shaft with Au, Ag, Cu, or Sn or each alloy, and by combining the shaft with a bearing in ruby.
Inventors:
SUZUKI TOSHIHARU
OKAZAKI SAKIHO
OKAZAKI SAKIHO
Application Number:
JP5516777A
Publication Date:
December 07, 1978
Filing Date:
May 13, 1977
Export Citation:
Assignee:
SUWA SEIKOSHA KK
International Classes:
G04C3/14; C25D7/00; F16C3/02; G04B31/00; G04B31/08; G04C15/00; (IPC1-7): C25D7/00; F16C3/02; G04B31/00; G04C15/00