Patents Assigned to Horstmann Clifford Magnetics Ltd.
  • Oscillating reed electric motors
    Patent number: 4056743
    Abstract: An electric motor of the kind in which an oscillating element carries a magnet which is coupled magnetically to a rotor to transmit drive thereto. The electrical driving signals for the oscillating element, derived for example from a divided-down quartz crystal oscillator, have a frequency f which is f/2Q less than the natural resonant frequency of the oscillating element, where Q is the Q factor of the element, to maintain drive of the latter for all variations in natural frequency due to ambient changes.
    Type: Grant
    Filed: November 6, 1975
    Date of Patent: November 1, 1977
    Assignee: Horstmann Clifford Magnetics Ltd.
    Inventors: Cecil Frank Clifford, Laurence Harry Finlayson