Patents by Inventor James L. Kirtley

James L. Kirtley 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).

  • Rotating electric machine having a controlled gradient winding and a circumferentially segmented magnetic core armature
    Patent number: 3999093
    Abstract: A high voltage rotating electric machine having an armature that includes a continuous gradient a-c winding and comprising a high permeability magnetic material subdivided in the circumferential direction into a plurality of segments. Each segment is electrically insulated from every other segment.
    Type: Grant
    Filed: June 21, 1973
    Date of Patent: December 21, 1976
    Assignee: Massachusetts Institute of Technology
    Inventor: James L. Kirtley, Jr.
  • Superconducting machine having wound damper-shield winding
    Patent number: 3999091
    Abstract: A superconducting machine having a wound damper-shield winding disposed in the cold region of the machine and having electrical leads to a warm region. Electric current control means at the warm region is connected to the leads and acts to pass current in a predetermined pattern as a function of voltages that appear across the leads as a consequence of transients in the machine.
    Type: Grant
    Filed: November 13, 1974
    Date of Patent: December 21, 1976
    Assignee: Massachusetts Institute of Technology
    Inventors: James L. Kirtley, Jr., Joseph L. Smith, Jr.
  • Superconducting machine having flexible shield means operable to protect the superconducting field winding against transients
    Patent number: 3956648
    Abstract: A superconducting machine wherein the field winding and associated elements in the cold region of the machine are protected against transients by a flexible, electrically conductive outer shield means that interacts with an inner conductive shell in a way that causes the magnetic field to be compressed between the shield and the shell, thereby to transmit mechanical radial forces between the two.
    Type: Grant
    Filed: November 13, 1974
    Date of Patent: May 11, 1976
    Assignee: Massachusetts Institute of Technology
    Inventors: James L. Kirtley, Jr., Gerald L. Wilson