Patents by Inventor Derek Armstrong

Derek Armstrong 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).

  • Patent number: 4135293
    Abstract: A superconductor of the general formula A.sub.3 B, e.g. Nb.sub.3 Sn, is manufactured by mechanical fabrication of A filaments in a bronze containing B followed by heat treatment to form A.sub.3 B by solid state reaction from B diffusing through the bronze without melting of the bronze. A pure metal for stabilization is mechanically fabricated together with the other components and protected from diffusion thereinto of any of the other components by a barrier layer of A metal. Superconductor formation on the barrier layer of A metal during the heat treatment is avoided or reduced by surface treatment or surface coating which inhibits A.sub.3 reaction between A and B at the barrier.
    Type: Grant
    Filed: September 29, 1975
    Date of Patent: January 23, 1979
    Assignee: United Kingdom Atomic Energy Authority
    Inventors: Peter E. Madsen, James A. Lee, Derek Armstrong
  • Patent number: 4094060
    Abstract: A superconducting member is manufactured by mechanical fabrication to final dimensions of a matrix comprising a base material, such as niobium, an alloy essentially consisting of a carrier material and at least one element, such as tin, a metal for stabilization and a barrier material protecting the metal for stabilization. After mechanical fabrication a superconducting compound of the base material and the element is formed by heat treatment to cause a solid state reaction. The barrier material prevents diffusion of any of the components into the metal for stabilization.
    Type: Grant
    Filed: June 9, 1975
    Date of Patent: June 13, 1978
    Assignee: United Kingdom Atomic Energy Authority
    Inventors: Peter Emil Madsen, John Philip Charlesworth, Derek Armstrong