Patents Assigned to Kisho Electronics Co., Ltd.
  • Patent number: 7654220
    Abstract: An indicator has a permanent magnet and a coil rotatably supported on the permanent magnet and wound so as to form a surface that is parallel to and disposed at a preselected distance from a bottom surface of the permanent magnet. The coil generates a torque by interaction with a magnetic field of the permanent magnet upon supply of a current to the coil. An indicator needle is mounted to undergo rotation with the coil through a range of angles corresponding to indicator angles of the indicator needle. A pair of spiral springs urge the indicator needle in a direction opposite to a direction of the torque to undergo rotation through the range of indicator angles. The pair of spiral springs comprise a first spiral spring connected at one end thereof to one end of the coil and a second spiral spring connected at one end thereof to another end of the coil.
    Type: Grant
    Filed: February 13, 2007
    Date of Patent: February 2, 2010
    Assignees: Seiko Instruments Inc., Kisho Electronics Co., Ltd.
    Inventors: Shigeki Yagi, Ryuichi Yoshida
  • Patent number: D298573
    Type: Grant
    Filed: December 30, 1985
    Date of Patent: November 15, 1988
    Assignee: Kisho Electronics Co., Ltd.
    Inventor: Takeo Komamura