Patents by Inventor Peter John Swallow

Peter John Swallow 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).

  • Electrical contact materials
    Patent number: 3981726
    Abstract: An electrical contact material which consists of a mixture of silver, 5 to 50 weight per cent of copper and 2 to 20 weight per cent of lanthanum, strontium chromite of formula La.sub.1-x Sr.sub.x CrO.sub.3, where the values of x lie between 0 and 1.0, formed as a hard, chemically inert, non-metallic phase of high electrical conductivity both within the bulk of, and at the surface of, the contact material. Methods of producing the electrical contact materials utilizing powder metallurgical techniques are outlined.
    Type: Grant
    Filed: June 13, 1975
    Date of Patent: September 21, 1976
    Assignee: Square D Company
    Inventors: Peter Douglas, David John Pedder, Peter John Swallow, Terrence Ardern Davies
  • Electrical contact materials
    Patent number: 3957508
    Abstract: The material consists of a mixture of silver and 1.0 to 20 weight per cent of lanthanum, strontium chromite of the formula La.sub.1.sub.-x Sr.sub.x CrO.sub.3, where the values of x lie between 0 and 1.0. The addition of 2.5 to 20 weight per cent of cadmium oxide further improves the electrical contact material by providing anti-weld properties to the contact interface. The electrical contacts are formed from the contact material by powder metallurgy techniques.
    Type: Grant
    Filed: March 17, 1975
    Date of Patent: May 18, 1976
    Assignee: Square D Company
    Inventors: Terrence Ardern Davies, Peter John Swallow