Patents by Inventor Allan W. Tomalesky

Allan W. Tomalesky 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 and apparatus for measuring crucible level of molten metal
    Patent number: 4446562
    Abstract: Improved and simplified measurement of the level of molten metal in a crucible heated by an induction coil utilizes a variable frequency power supply for the induction coil. Power supply frequency is changed to maintain the power provided to the coil substantially constant, independent of variations of power factor in the coil circuit. Detection of the frequency of power supplied to the induction coil provides an indication of the changes in power factor of the coil due to changes in the level of molten metal surrounded by the coil, and thus of the level of the molten metal.
    Type: Grant
    Filed: October 13, 1981
    Date of Patent: May 1, 1984
    Assignee: Electric Power Rsearch Institute, Inc.
    Inventors: Paul G. Friedmann, Frank N. Patris, Allan W. Tomalesky