Patents by Inventor Walter James Anderson

Walter James Anderson 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).

  • Induction heating device for metal pieces
    Patent number: 6538239
    Abstract: A magnetic heating device comprising three electrical coils, each coil being wound around a respective magnetic yoke having a gap therein, the three yokes being arranged such that the gaps are adjacent to each other or coincident, an article to be heated being located, in use, in the gaps in the three yokes, so as to direct the magnrtic field generated in each yoke by its respective coil through the articles, each coil being connected to a respective different phase of a three phase low frequency alternating electrical supply, and one of the coils being wound in the opposite direction to the other two coil.
    Type: Grant
    Filed: November 12, 1999
    Date of Patent: March 25, 2003
    Inventors: Walter James Anderson, Philip Anthony Browning, Barrie Higgins, Paul John Spencer, Brian Kenneth Powell