Patents by Inventor Harry A. Gustafson

Harry A. Gustafson 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).

  • Low cost ring laser angular rate sensor
    Patent number: 4817112
    Abstract: A ring laser angular rate sensor is constructed from a solid glass block with lasing paths machined therein and mirrors joined to the block with a frit seal.
    Type: Grant
    Filed: May 10, 1985
    Date of Patent: March 28, 1989
    Assignee: Honeywell Inc.
    Inventors: Mark W. Weber, Harry Gustafson
  • Ring laser lock-in correction apparatus
    Patent number: 4641970
    Abstract: In the present application, an apparatus is provided for altering a ring laser angular rate sensor in such a way that the phase difference between the propagating waves therein includes lock-in error compensation. The apparatus of the present invention obtains a compensation output signal derived from the intensity of one or both of the propagating waves related to sensor lock-in error which can be utilized to alter the behavior of the ring laser so as to alter the behavior of the phase difference between the counter-propagating waves so that lock-in error contained therein is corrected.
    Type: Grant
    Filed: September 20, 1982
    Date of Patent: February 10, 1987
    Assignee: Honeywell Inc.
    Inventors: Harry A. Gustafson, Wah L. Lim, Francis H. Zeman
  • Discriminant apparatus for laser gyros
    Patent number: 4551021
    Abstract: A discriminant apparatus for laser angular rate sensors which provides an output signal related to a selected weighted vectorial sum of the coupling of energy between counterpropagating waves traveling about a closed-loop path. The discriminant apparatus is utilized in a closed-loop control system for minimizing the lock-in rate of the sensor and/or maintaining and selecting scale factor linearity.
    Type: Grant
    Filed: March 1, 1982
    Date of Patent: November 5, 1985
    Assignee: Honeywell Inc.
    Inventors: Stephen P. Callaghan, Timothy J. Callaghan, Harry A. Gustafson, Wah L. Lim