Patents by Inventor Gordon H. Rawcliffe, deceased

Gordon H. Rawcliffe, deceased 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).

  • Pole-amplitude modulation, pole-changing electric motors and generators
    Patent number: 4338534
    Abstract: A pole-amplitude modulation (P.A.M.) three-phase, pole-number changing machine having star-connected and delta-connected stator winding components, thereby providing additional means for reducing m.m.f. harmonics in the resultant three-phase field. Pole-number changing is effected by reversing the star-connected winding component relatively to the delta-connected component.A design method defines relationships between alternative pole-numbers and stator slot number, and slot-spacing between star- and delta-connected components.
    Type: Grant
    Filed: April 9, 1980
    Date of Patent: July 6, 1982
    Assignee: National Research Development Corporation
    Inventors: Alexander R. W. Broadway, Gordon H. Rawcliffe, deceased, by Caroline S. Rawcliffe, executrix