Patents by Inventor John L. Buttolph, III

John L. Buttolph, III 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).

  • Electric storage heater system having charging control that transmits charging information over power lines
    Patent number: 4540875
    Abstract: Apparatus which can control a remotely-located electric storage heater from a central location without requiring control wires between the central location and the remote location is disclosed. Control signals indicating the heating cycle and representative of the outside ambient temperature are generated by apparatus at the central location and encoded by high-frequency signals which are superimposed on the normal power line voltage. At remote locations each electric storage heater is equipped with a receiver unit which decodes the high frequency control signals superimposed on the power line. The receiver unit then operates a solid state relay to convert the coded signals into the normal control signals which operate the heater.
    Type: Grant
    Filed: July 27, 1984
    Date of Patent: September 10, 1985
    Assignee: Silver Lake Corporation
    Inventor: John L. Buttolph, III