Patents by Inventor John M. Stevens

John M. Stevens 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).

  • Electric heating assembly for a fused bath
    Patent number: 4192992
    Abstract: A heating assembly for a fused bath is disclosed. The assembly includes a heating element within a tube. Also, disposed within the tube is a first thermocouple. A second thermocouple is positioned in the bath outside the tube. Control means are connected to the heating elements and thermocouples so that the heating of the bath is performed responsive to the temperature sensed by the second thermocouple; but, if the first thermocouple detects heat in the tube greater than a given value it will interrupt the heating operation to prevent damage to the heating elements due to over-heating.
    Type: Grant
    Filed: June 29, 1978
    Date of Patent: March 11, 1980
    Assignee: Kolene Corporation
    Inventors: John M. Stevens, Grant W. Allen, John M. Cole, Timothy K. Mousseau