Patents Examined by M. Lateet
  • Self regulating heater
    Patent number: 4877944
    Abstract: A self regulating heater comprises a non-conductive, magnetic core having a coil wound about it and providing pole pieces extending into contact or very near contact with a surrounding ferromagnetic member which in turn may be surrounded by and in intimate contact with a non-magnetic low resistance member; the magnetic member having an effective Curie temperature at the temperature to be maintained.
    Type: Grant
    Filed: June 8, 1987
    Date of Patent: October 31, 1989
    Assignee: Metcal, Inc.
    Inventors: Mark J. Cowell, Kevin Ladd, Philip S. Carter, Jr.