Patents by Inventor James J. McCarthy

James J. McCarthy 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).

  • Safe Class-2 motor control circuit and method adapted for electric vacuum cleaning system suction motor and agitator motor control
    Patent number: 6239576
    Abstract: A control circuit for selectively energizing at least one electrical device coupled to the control circuit via a pair of conductive wires with an operating voltage. The control circuit comprises a control circuit for selectively supplying and withholding operating electrical power to at least one electrical device. A first current detector is connected to a control voltage and senses a current flow resulting from closure of a circuit connected to a control voltage in at least one wire of the pair of conductive wires. A second current detector is connected to the operating voltage and senses a current flow resulting from closure of a circuit connected to the operating voltage in at least one wire of the pair of conductive wires. A first switching device responds to the first current detector to disconnect the control voltage from at least one of the wires and to connect the operating voltage to the conductive pair.
    Type: Grant
    Filed: September 3, 1999
    Date of Patent: May 29, 2001
    Assignee: Beamco, Inc.
    Inventors: John J. Breslin, James J. McCarthy
  • Font of characters for forming a graphic display
    Patent number: D257360
    Type: Grant
    Filed: February 17, 1978
    Date of Patent: October 14, 1980
    Assignee: Honeywell Inc.
    Inventors: James J. McCarthy, Joseph M. Wozniak