Patents by Inventor George E. Hess

George E. Hess 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).

  • Combined humidistat and electronic air flow responsive switch
    Patent number: 4382433
    Abstract: An electronic air flow responsive switch is connected in circuit with a humidistat switch for controlling operation of a humidifier in a forced air heating system. The air flow responsive switch includes a self-heating PTC (positive temperature coefficient) thermistor which enables operation of the humidifier only when the humidistat switch is closed and there exists sufficient air flow for cooling the thermistor. The air flow responsive switch and humidistat switch are mounted in a single enclosure and include plug and cord arrangements for simplifying installation of the device.
    Type: Grant
    Filed: April 22, 1982
    Date of Patent: May 10, 1983
    Assignee: Emerson Electric Co.
    Inventors: George E. Hess, Donald E. Donnelly, Robert E. Reinwart