Patents by Inventor Ralph L. Bishop

Ralph L. Bishop 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).

  • Thermal pellet cutoff switch
    Patent number: 5825277
    Abstract: A thermal pellet holds contact-carrying resilient switch blades in bending stress with the contacts closed. Melting of the thermal pellet relieves the bending stress and allows movement of the switch blades to open the contacts.
    Type: Grant
    Filed: September 27, 1996
    Date of Patent: October 20, 1998
    Assignee: Therm-O-Disc, Incorporated
    Inventors: Ralph L. Bishop, James B. Kalapodis
  • Adjustable bimetal snap disc thermostat with heaters
    Patent number: 4533894
    Abstract: An adjustable bimetal snap disc thermostat is disclosed which provides conventional resistance-type heaters symmetrically positioned adjacent one side of the snap disc to allow adjustment of the operating temperature of the thermostat. The heaters are supported by heater terminals which extend up through the thermostat body and cover, and connect the cover to the thermostat body. The heaters and heater terminals are connected as a subassembly and subsequently installed as a unit in a device to minimize assembly costs. Further, since the heaters are conventional commercially available heaters, the cost of the heaters per se is minimized.
    Type: Grant
    Filed: June 18, 1984
    Date of Patent: August 6, 1985
    Assignee: Therm-O-Disc, Incorporated
    Inventors: Ralph L. Bishop, William N. Rich, Walter C. Kowalski