Patents Assigned to Silcon Enterprises Ltd.
  • Stepping motor for timepiece
    Patent number: 5124599
    Abstract: A stepping motor for a timepiece has a coil (12), a single magnetic circuit, two stator pole pieces (10a, 10b), and two rotors in the form of axially magnetized permanent-magnet disks (13, 14). The two rotors are coaxial and disposed one on each side of a plane defined by the stator pole pieces defining gaps of different widths (.delta.1, .delta.2) between adjacent facing surfaces of said respective disks and said stator pole pieces.
    Type: Grant
    Filed: March 19, 1991
    Date of Patent: June 23, 1992
    Assignee: Silcon Enterprises Ltd.
    Inventors: Chung Yeung Chan, Chong Sirivai