Patents by Inventor Alastair Martin Pitt

Alastair Martin Pitt 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).

  • Impregnated capacitor and method of manufacture
    Patent number: 3970904
    Abstract: A capacitor element is made by interwinding electrode foils and non-porous dielectric films, without interposed paper wicks. The foils and films are wound at different tensions so that transverse passages are formed between adjacent surfaces within the element; when the element is subsequently impregnated with dielectric liquid, those passages facilitate entry of the liquid between the various foils and films and assist proper permeation. The dielectric film and dielectric liquid are preferably polypropylene and mineral oil respectively.
    Type: Grant
    Filed: June 6, 1974
    Date of Patent: July 20, 1976
    Assignee: Johnson & Phillips (Capacitors) Limited
    Inventors: John Edward Murfitt, Alastair Martin Pitt