Patents by Inventor Douglas L. Whitman

Douglas L. Whitman 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).

  • Optical imaging system for fabric seam detection
    Patent number: 5150175
    Abstract: A non-contacting optical imaging system for seam or other periodic pattern detection for a web of material such as a strip of fabric is disclosed in which a line scan camera is used to capture a seam or other periodic pattern image and the electrical output from the camera is converted to an alternating current signal and then to a direct current signal which is proportional to the presence or absence of a seam other periodic pattern. The DC signal is integrated and then compared to a preset reference value to produce a signal for driving an alarm, display or machine control devices.
    Type: Grant
    Filed: March 13, 1991
    Date of Patent: September 22, 1992
    Assignee: American Research Corporation of Virginia
    Inventors: Douglas L. Whitman, Adel K. Sarrafzadeh