Patents by Inventor Allan P. Johnson

Allan P. Johnson 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).

  • Radiation hard visible light readout circuit
    Patent number: 4659930
    Abstract: A pair of photodetectors are electrically connected in series. A common interconnection point of the two photodetectors is electrically connected to the inverting input of an opertional amplifier to provide a signal indicative of visible light falling on one of the photodetectors. The other of the photodetectors is masked to block visible but allow a response to non-visible radiation in the form of gamma, x-rays and the like.
    Type: Grant
    Filed: December 27, 1985
    Date of Patent: April 21, 1987
    Assignee: Honeywell Inc.
    Inventors: Allan P. Johnson, Ronald W. Shovan
  • Dither system for a spring mass system
    Patent number: 4445779
    Abstract: A dither motor system is described for a ring laser angular rate sensor which forms part of a spring-mass system. The dither motor system of the present invention provides selected control of the peak clockwise and/or peak counterclockwise dither angle of rotation of a spring-mass system.
    Type: Grant
    Filed: July 6, 1981
    Date of Patent: May 1, 1984
    Assignee: Honeywell Inc.
    Inventor: Allan P. Johnson