Patents by Inventor Robert Edward Draper

Robert Edward Draper 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).

  • Sandwich insulation for increased corona resistance
    Patent number: 5989702
    Abstract: A sandwich type insulation for electrical machinery comprising a laminate of a polymeric material such as polyimide which contains particles of an inorganic corona resistant material, said polymeric material being bonded to mica paper consisting of mica, wherein said mica paper may be impregnated with polymeric resin containing particles of inorganic corona resistant material. The resultant insulation may be used as a tape or wrapper.
    Type: Grant
    Filed: August 7, 1996
    Date of Patent: November 23, 1999
    Assignee: General Electric Canada Inc.
    Inventors: Robert Edward Draper, G. Paul Jones, Robert H. Rehder, Michael Stutt
  • Multi-layer insulation for winding elements of dynamoelectric machines (D.E.M.s)
    Patent number: 5973269
    Abstract: An insulation system for the windings of a dynamoelectric machine is described wherein a bundle of insulated conductors is provided with layers of groundwall insulation. The innermost layer of groundwall insulation has superior corona discharge resistant properties. A second layer of groundwall insulation which has a corona discharge resistance somewhat less than the innermost layer of groundwall is superimposed on the innermost layer.
    Type: Grant
    Filed: April 16, 1996
    Date of Patent: October 26, 1999
    Assignee: General Electric Canada Inc.
    Inventors: Robert Edward Draper, Luc Jean Joseph Lafortune, Michael Beapre, Bernard John Moore