Patents Assigned to Precision Navigation, Incorporated
  • Patent number: 4851775
    Abstract: A digital compass (20) has a sensing coil (60) wound on an elongated strip of high direct current permeability magnetic material. The sensing coil (60) is connected to a sensing circuit (56). The sensing coil and sensing circuit are responsive to the Earth's magnetic field to provide an oscillating signal at an output (28) of the sensing circuit (56) which varies in frequency with orientation of the at least one sensing coil (60) with respect to the Earth's magnetic field. A microprocessor (36) is connected to receive information inputs from the oscillating signal. The microprocessor converts the information inputs to an indication of orientation of the sensing coil with respect to the Earth's magnetic field based on the frequency of the oscillating signal. A display (52) receives the orientation indication from the microprocessor.
    Type: Grant
    Filed: July 2, 1987
    Date of Patent: July 25, 1989
    Assignee: Precision Navigation, Incorporated
    Inventors: Nam H. Kim, Timothy Hawks
  • Patent number: D345310
    Type: Grant
    Filed: September 19, 1991
    Date of Patent: March 22, 1994
    Assignee: Precision Navigation, Incorporated
    Inventor: Thomas G. Henning