Patents Assigned to Citizen Watch Co. Limited
  • Patent number: 4090350
    Abstract: A switch mechanism for an electronic timepiece comprises a minimum number of control switches and an electric circuit means associated therewith. The electric circuit means is arranged such that when the control switches are actuated independently of each other the control switches provide respective switching functions whereas when selected ones of the control switches are concurrently actuated respective switching functions of the control switches are inhibited and, instead thereof, another switching function is provided.
    Type: Grant
    Filed: May 3, 1976
    Date of Patent: May 23, 1978
    Assignee: Citizen Watch Co., Limited
    Inventor: Yasushi Nomura
  • Patent number: 4035673
    Abstract: A mechanical vibrator for a timepiece in which a ceramic supporting substrate is rigidly secured to an inner wall of an evacuated housing. The supporting substrate is formed at its one surface with a pair of conducting metal layers serving as leads and at its other surface with a conducting metal layer over a substantially large area. A piezoelectric vibrating element having exciting electrodes is placed on the ceramic supporting substrate and rigidly connected thereto such that the electrodes of the piezoelectric vibrating element are electrically connected to the conducting metal layers formed on the one surface of the ceramic supporting substrate. The conducting metal layers are in turn connected to projecting leads extending outwardly of the evacuated housing and adapted to be connected to a printed circuit of the timepiece.
    Type: Grant
    Filed: December 18, 1975
    Date of Patent: July 12, 1977
    Assignee: Citizen Watch Co. Limited
    Inventors: Fujio Ishida, Haruo Suda