Patents by Inventor William J. Gregory, Jr.

William J. Gregory, Jr. has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and apparatus for calibrating gyroscopically-stabilized, magnetically-slaved heading reference system
    Patent number: 4347730
    Abstract: A heading reference system mounted in a vehicle, e.g. an aircraft or a ta includes a magnetic compass and a gyroscope. The magnetic compass is subject to deviation in the magnetic field, hence the system must be calibrated. If the vehicle is oriented in a starting direction, and the output of the magnetic compass compared to the output of the gyroscope, an error signal is developed. This error signal is filtered to reduce noise, then stored. The vehicle is then re-oriented and the procedure repeated until sufficient information is available to calibrate the system. A microprocessor may be used for the computations and filtering of noise.
    Type: Grant
    Filed: February 19, 1980
    Date of Patent: September 7, 1982
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Matthew J. Fisher, William J. Gregory, Jr.