Patents by Inventor Richard E. Loughman

Richard E. Loughman 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).

  • Method of determining detector lifetime using a stepped resistor network
    Patent number: 5214271
    Abstract: A method and apparatus for sensing the presence of a document moved to a printing station in a printer and for detecting skewness (if any) of the document at the printing station. A first light-detector pair and a second light-detector pair are used, with the sensitivity of each of the detectors in the light-detector pairs being adjusted each time the printer is turned on. A controller and a stored program are used to adjust the sensitivity of the detector along with a resistor network providing steps of resistance. The particular resistance step to which a detector is adjusted also gives a measure of the useful life left for the detector.
    Type: Grant
    Filed: November 5, 1992
    Date of Patent: May 25, 1993
    Assignee: NCR Corporation
    Inventors: Richard E. Rogers, Larry D. Turvy, Jr., George J. Eberhardt, Richard E. Loughman
  • Optical paper sensing method and apparatus having light source and detector moveable in pivotal relation
    Patent number: 5187374
    Abstract: A method and apparatus for sensing the presence of a document moved to a printing station in a printer and for detecting skewness (if any) of the document at the printing station. A first light-detector pair and a second light-detector pair are used, with the sensitivity of each of the detectors in the light-detector pairs being adjusted each time the printer is turned on. A controller and a stored program are used to adjust the sensitivity of the detector along with a resistor network providing steps of resistance. The particular resistance step to which a detector is adjusted also gives a measure of the useful life left for the detector.
    Type: Grant
    Filed: March 21, 1991
    Date of Patent: February 16, 1993
    Assignee: NCR Corporation
    Inventors: Richard E. Rogers, Larry D. Turvy, Jr., George J. Eberhardt, Richard E. Loughman