Patents by Inventor James Ronald Snape

James Ronald Snape 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).

  • Method of making heating cables
    Patent number: 4033028
    Abstract: A mineral insulated heating cable and a method of making same wherein the cable has the characteristic that for a given supply voltage the heat generated per unit length of the cable is substantially unaffected by the total length of the cable. The mineral insulated heating cable comprises at least two metallic conductors, a metallic protective sheath, a body of compacted mineral insulating material filling the sheath and spacing the conductors from one another and embedded in the compacted mineral insulating material and contacting each of the two said conductors throughout their lengths, at least one resistance element in the form of a thin layer consisting predominantly of resistive material.
    Type: Grant
    Filed: April 22, 1976
    Date of Patent: July 5, 1977
    Assignee: Pyrotenax of Canada Limited
    Inventors: David Malcolm Howie, Roy Victor W. McKenzie, James Ronald Snape
  • Heating cables and manufacture thereof
    Patent number: 4001760
    Abstract: A mineral insulated heating cable and a method of making same wherein the cable has the characteristic that for a given supply voltage the heat generated per unit length of the cable is substantially unaffected by the total length of the cable. The mineral insulated heating cable comprises at least two metallic conductors, a metallic protective sheath, a body of compacted mineral insulating material filling the sheath and spacing the conductors from one another and embedded in the compacted mineral insulating material and contacting each of the two said conductors throughout their lengths, at least one resistance element in the form of a thin layer consisting predominantly of resistive material.
    Type: Grant
    Filed: June 16, 1975
    Date of Patent: January 4, 1977
    Assignee: Pyrotenax of Canada Limited
    Inventors: David Malcolm Howie, Roy Victor W. McKenzie, James Ronald Snape