Patents by Inventor John B. Sanders, Jr.

John B. Sanders, 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).

  • Speed control for a four pole motor
    Patent number: 4264847
    Abstract: A four pole d.c. motor speed control is provided by connecting two of the opposed brushes together to ground and the intermediate brushes to separate terminals of a switch means which in energized positions connects a grounded power supply to at least one of the brushes. The switch means supplies various combinations including direct connection of the power supply to one or both of the brushes. Connection of the power supply through resistance means, connection of the other brush to provide a closed circuit across the windings or to provide a resistance in series with those windings.
    Type: Grant
    Filed: June 20, 1979
    Date of Patent: April 28, 1981
    Assignee: Ambac Industries, Incorporated
    Inventors: John B. Sanders, Jr., Robert P. Thrasher, Jr.