Patents by Inventor Paul J. Rustebakke

Paul J. Rustebakke 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).

  • Patent number: 5424899
    Abstract: The present invention provides a compact transformer with a magnetic core having at least two leg members and two side members. Each leg member has two ends and a peripheral surface therebetween. Each side member has a generally planar body with at least two notches corresponding in cross-sectional shape and size to the end of each leg member. The sides of each notch surround and abut a majority of the peripheral surface near each leg member end. The leg member end is secured to each notch. A magnetically coupled primary and secondary winding is arranged around each leg member. The transformer is particularly useful in sending current signals to an electronic trip unit of a circuit interrupter.
    Type: Grant
    Filed: October 30, 1992
    Date of Patent: June 13, 1995
    Assignee: Square D Company
    Inventors: Gary W. Scott, Paul J. Rustebakke