Patents by Inventor Edward William Fisher

Edward William Fisher 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).

  • Combustible gases detector
    Patent number: 4063898
    Abstract: A differential thermocouple combustible gas detector is provided by coating one thermocouple junction of a differential thermocouple pair with a catalyst and the other thermocouple junction with a non-catalyst. Heated combustible gases react with the catalyst to liberate heat to the catalyst coated thermocouple junction in proportion to the concentration of combustible gases and proportionally raise the temperature of that junction above the non-catalyst coated junction. The output signal from the differential thermocouple device is thus a signal indicative of the concentration of combustible gases.
    Type: Grant
    Filed: September 20, 1976
    Date of Patent: December 20, 1977
    Assignee: Bailey Meter Company
    Inventor: Edward William Fisher