Patents by Inventor James S. Edmonds

James S. Edmonds 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).

  • Trapped-field, superconducting, induction-synchronous motor/generator having improved startup torque
    Patent number: 5325002
    Abstract: A motor/generator that is operable in an inductive mode during a startup phase and in a synchronous mode thereafter. Superconductor material is included in either the stator or the rotator and a magnetic field generator is included in the other of these two members. Induced fields in a torque-shield provide coupling between the stator and the rotor during the startup phase and then a trapped field in the superconductor provides coupling between the stator and the rotor thereafter.
    Type: Grant
    Filed: February 18, 1992
    Date of Patent: June 28, 1994
    Assignee: Electric Power Research Institute
    Inventors: Mario Rabinowitz, James S. Edmonds
  • Acoustic monitor for rotary electrical machinery
    Patent number: 4722226
    Abstract: Loose field windings in a rotating electrical machine are detected by sensing acoustic waves created by stator bars and stator wedges. A sensor is mounted on the rotor which responds to sensed acoustic waves by generating an electrical signal. The signal is suitably conditioned and transmitted by telemetry means to a computer for processing.
    Type: Grant
    Filed: April 10, 1986
    Date of Patent: February 2, 1988
    Assignee: Electric Power Research Institute
    Inventor: James S. Edmonds