Patents by Inventor Herman P. Smith

Herman P. Smith 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 cartridge heater with metal sleeve adapter
    Patent number: 3937923
    Abstract: Cartridge heaters are most frequently used for heating metal parts by insertion into bores in such parts. Such heaters are manufactured in various diameters to closely fit within complementary bores to provide heat according to required specifications. My invention makes it possible to use a heater of known sheath diameter in bores of larger diameter, by use of metal sleeve means which have an inside diameter to closely receive the heater and an outside diameter to closely fit within the bore.
    Type: Grant
    Filed: April 28, 1975
    Date of Patent: February 10, 1976
    Assignee: Emerson Electric Company
    Inventor: Herman P. Smith