Patents by Inventor Marvin E. Liebler

Marvin E. Liebler 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).

  • Method of assembling helical resistor
    Patent number: 4028793
    Abstract: A power resistor including a resistance element of metal ribbon formed into an edgewound helix, and an internal three-point support structure axially disposed within the interior of the helix. The support structure includes three insulating assemblies each having a plurality of insulators secured by longitudinal compression springs to a support bar. The support structure also includes a pair of spreaders located at opposite ends of the helix, each having three radially extending arms. Assembly of the resistor includes the steps of inserting the insulating assemblies into the interior of the helix, radially spreading the insulating assemblies against the interior of the helix, and welding the ends of the support bars to the extending arms of the spreaders.
    Type: Grant
    Filed: September 13, 1976
    Date of Patent: June 14, 1977
    Assignee: Westinghouse Electric Corporation
    Inventors: Marvin E. Liebler, Eugene J. Lum
  • Helical resistor and method for assembling
    Patent number: 4001761
    Abstract: A power resistor including a resistance element of metal ribbon formed into an edgewound helix, and an internal three-point support structure axially disposed within the interior of the helix. The support structure includes three insulating assemblies each having a plurality of insulators secured by longitudinal compression springs to a support bar. The support structure also includes a pair of spreaders located at opposite ends of the helix, each having three radially extending arms. Assembly of the resistor includes the steps of inserting the insulating assemblies into the interior of the helix, radially spreading the insulating assemblies against the interior of the helix, and welding the ends of the support bars to the extending arms of the spreaders.
    Type: Grant
    Filed: June 27, 1975
    Date of Patent: January 4, 1977
    Assignee: Westinghouse Electric Corporation
    Inventors: Marvin E. Liebler, Eugene J. Lum