Patents by Inventor James H. Frazier

James H. Frazier 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).

  • Steered low cost auto focus system
    Patent number: 4358674
    Abstract: Range finding equipment for use with optical systems utilizing a small number of radiation detectors positioned to receive radiation in first and second patterns from a remote object. The logarithm of the ratio of the output of a first and second detector are compared with the logarithm of the ratio of the output of a third and fourth detector to determine which has the largest absolute magnitude. The system operates to control the range finding circuitry with the largest signal thus obtained.
    Type: Grant
    Filed: December 4, 1980
    Date of Patent: November 9, 1982
    Assignee: Honeywell, Inc.
    Inventor: James H. Frazier
  • Low contrast default for auto focus system
    Patent number: 4358675
    Abstract: Apparatus for use with range finding equipment in which the radiation from a remote object may be too small to provide for proper operation. A signal which is a function of the logarithm of the ratio of the output of a first and second detector and a signal which is the function of the logarithm of the ratio of a third and fourth detector is compared with a reference signal. If the reference signal is larger than both of the other signals, the system operates to focus at a predetermined position.
    Type: Grant
    Filed: December 5, 1980
    Date of Patent: November 9, 1982
    Assignee: Honeywell Inc.
    Inventors: James H. Frazier, John C. Wittenberger