Patents by Inventor Clarence E. Schafer

Clarence E. Schafer 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: 3969814
    Abstract: A waveguide structure is fabricated by plating a mandrel with a high electrical conductivity metal, such as copper; plasma spray coating the plated mandrel with a selected waveguide body material; forming coupling flanges about the plated mandrel at the ends of the plasma spray formed layer; and removing the mandrel in such a way that the plated metal and plasma spray formed layers remain intact to form a tubular waveguide body with an inner high conductivity liner. The waveguide structure described is a plural cavity bandpass waveguide filter which is fabricated on a mandrel comprising separable sections arranged end to end. Plated iris discs are clamped between the confronting ends of the mandrel sections prior to metal plating plasma spray coating of the mandrel, such that when the mandrel is removed, the iris discs remain intact with and peripherally joined to the filter body liner to define the resonant filter cavities.
    Type: Grant
    Filed: January 15, 1975
    Date of Patent: July 20, 1976
    Assignee: TRW Inc.
    Inventors: Albert Toy, Paul T. Nelson, Clarence E. Schafer