Patents by Inventor William Unsworth

William Unsworth 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).

  • Magnesium alloys
    Patent number: 4401621
    Abstract: Magnesium alloys for castings having good tensile properties at both ambient and high temperatures and good resistance to creep contain 1.5-10% of yttrium or an yttrium/heavy rare earths mixture and 1-6% of neodymium or a neodymium/lanthanum/praseodymium mixture. The alloys may be heat treated to improve their properties.
    Type: Grant
    Filed: March 25, 1982
    Date of Patent: August 30, 1983
    Assignee: Magnesium Elektron Limited
    Inventors: William Unsworth, John F. King, Stephen L. Bradshaw
  • Magnesium alloys
    Patent number: 4239535
    Abstract: A magnesium alloy for casting contains from 2 to 10% of zinc and from 0.5 to 5% of copper as essential constituents, aluminium being substantially absent. The alloy as cast has a fine grain size, making a grain refinement step unnecessary and has favorable mechanical properties, especially after heat treatment. Other constituents such as up to 2% manganese can be added to improve particular properties.
    Type: Grant
    Filed: May 31, 1979
    Date of Patent: December 16, 1980
    Inventors: John F. King, William Unsworth
  • Magnesium alloys
    Patent number: 4194908
    Abstract: A magnesium-based alloy for casting contains at least 88% magnesium, 1.6-3.5% silver, 0.1-2.3% of rare earth metals comprising at least 60% neodymium, 0-2.3% thorium and 0.1-2.5% yttrium. When no more than 0.5% of yttrium is present the minimum amount of thorium is given by the equation ##EQU1## Other elements may be present to improve the alloy properties.
    Type: Grant
    Filed: March 28, 1978
    Date of Patent: March 25, 1980
    Inventors: William Unsworth, John F. King, Stephen L. Bradshaw
  • Magnesium alloys
    Patent number: 4173469
    Abstract: Magnesium alloys having favorable tensile properties contain silver, copper and neodymium. The alloys are subjected to a solution heat treatment followed by ageing to give optimum properties.
    Type: Grant
    Filed: October 25, 1977
    Date of Patent: November 6, 1979
    Assignee: Magnesium Elektron Limited
    Inventors: William Unsworth, John F. King, Stephen L. Bradshaw
  • Magnesium alloys
    Patent number: 4168161
    Abstract: Magnesium alloys having favorable mechanical properties at high temperatures contain silver, neodymium and thorium, the permissible content of neodymium varying inversely according to the content of the thorium. The alloys are subjected to solution heat treatment followed by ageing to give optimum properties.
    Type: Grant
    Filed: October 25, 1977
    Date of Patent: September 18, 1979
    Assignee: Magnesium Elektron Limited
    Inventors: William Unsworth, John F. King, Stephen L. Bradshaw
  • Magnesium alloys
    Patent number: 4149882
    Abstract: Magnesium alloys having improved high-temperature properties, especially improved resistance to creep, contain from 1.25 to 3.0% silver, 0.5 to 2.5% of rare metals including at least 60% neodymium and from 2.5 to 7.0% thorium. Optimum properties are obtained by high-temperature solution treatment followed by aging at a lower temperature.
    Type: Grant
    Filed: October 25, 1977
    Date of Patent: April 17, 1979
    Assignee: Magnesium Elektron Limited
    Inventors: William Unsworth, John F. King, Stephen L. Bradshaw
  • Addition of magnesium to molten metal
    Patent number: 4040818
    Abstract: An additive for a ferrous melt to remove sulphur comprises agglomerates of a mixture of from 15 to 50% by weight of magnesium, 1 to 10% by weight of calcium fluoride and a refractory material to form a metal-permeable matrix when subjected to the temperature of a ferrous melt. The agglomerates may contain a binder and be formed into briquettes. The additive may be introduced into the melt by plunging.
    Type: Grant
    Filed: November 17, 1975
    Date of Patent: August 9, 1977
    Assignee: Magnesium Elektron Limited
    Inventors: Gordon A. Clegg, Geoffrey Maurice Cull, Phillip Andrew Fisher, William Unsworth
  • Process for hydriding magnesium based alloys
    Patent number: 3960609
    Abstract: Magnesium alloys are treated in a hydrogen atmosphere containing water vapor at an elevated temperature to enable hydrogen to diffuse into the alloy surface, the proportion of water vapor in the atmosphere being reduced during exposure. The alloy may be treated with chromic acid before exposure to increase the degree of penetration.
    Type: Grant
    Filed: September 13, 1974
    Date of Patent: June 1, 1976
    Assignee: Magnesium Elektron Limited
    Inventors: William Unsworth, Gordon Arthur Fowler