Patents by Inventor Raymond Druss, deceased

Raymond Druss, 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).

  • High voltage induction motor without ladder insulation between motor windings and method of construction therefor
    Patent number: 4227106
    Abstract: A permanent split capacitor induction motor rated at 460 volts AC is provided with first and second main winding parts and an auxiliary winding. The motor includes a core of magnetic material having a plurality of winding receiving slots formed in it. The main and auxiliary windings are constructed from a plurality of wire turns arranged in coil sets. The auxiliary winding is placed adjacent the first main winding part in the core slots, and is electrically connected to it. The coil sets of the auxiliary winding are separated from the coil sets defining the second main winding part by the coil sets of the first main winding part. Individual wire turns are distributed in the slots of the motor and positioned so that the voltage between coil sets forming the main winding parts and the auxiliary winding can never exceed the voltage across the capacitor.
    Type: Grant
    Filed: March 4, 1976
    Date of Patent: October 7, 1980
    Assignee: Emerson Electric Co.
    Inventors: Raymond Druss, deceased, Glenn Hoffmeister