Patents by Inventor Stuart L. DeWitt

Stuart L. DeWitt 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).

  • Thermostat with pilot light switch
    Patent number: 4968963
    Abstract: A thermostat for controlling the electrical heating element of an appliance has a user-activated control shaft for controlling the overall operation of the appliance. The thermostat includes a first switch controllable by a temperature sensing element for turning the heating element on and off. When the control shaft is turned to an off position, the shaft disables the operation of the first switch, maintaining it in an open condition. The thermostat also has a second switch which operates a pilot light for indicating when the appliance is on. The second switch is continuously open when the control shaft is in the off position and continuously closed when the control shaft is in an on position.
    Type: Grant
    Filed: November 6, 1989
    Date of Patent: November 6, 1990
    Assignee: Bimet Corporation
    Inventors: Stuart L. DeWitt, William I. Sanders