Patents by Inventor Jack E. Francis, Jr.

Jack E. Francis, Jr. 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).

  • Ambient light sensor touch switch system and method
    Patent number: 4329581
    Abstract: An ambient light responsive touch switch system for producing a signal whenever ambient light impinging on a photoelectric detector at a switch location is altered relative to the ambient light sensed by a photoelectric detector at a non-switch location. The system includes means for comparing the intensity of light between the photoelectric detector at a switch location relative to the intensity of ambient light at a non-switch location and a logic system that will produce a signal when the intensity of ambient light at the switch location is altered relative to the ambient light at the non-switch location.
    Type: Grant
    Filed: June 4, 1980
    Date of Patent: May 11, 1982
    Assignee: General Electric Company
    Inventors: Robert C. Helfrich, Jr., Jack E. Francis, Jr.