Patents by Inventor Thomas H. Close

Thomas H. Close 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).

  • Exposure control apparatus including rate responsive lag compensation
    Patent number: 4150891
    Abstract: An exposure control circuit of the type adapted to produce an exposure termination signal after a time interval related to a time integral of light intensity. The control circuit includes lag compensation means responsive to the light intensity at the time the exposure termination signal is produced, or responsive to a change in light intensity from the beginning of exposure measurement to the time the exposure termination signal is produced, to adjust the time interval to compensate for lag. The control circuit further includes improved lag compensation means responsive to the time rate of change of light intensity at the time that the exposure termination signal is produced for further adjusting the time interval to thereby provide improved lag compensation.
    Type: Grant
    Filed: February 2, 1978
    Date of Patent: April 24, 1979
    Assignee: Eastman Kodak Company
    Inventor: Thomas H. Close