Patents by Inventor John C. Frodsham

John C. Frodsham 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: 5032809
    Abstract: A multiway connector assembly comprising a tubular metal outer casing, a plurality of electrical lead-through terminations which extend through the outer casing, the terminations being coupled to respective pi-section filters, each of which is formed by two annular discoidal capacitors separated by a tubular inductive element. The outer electrodes of the capacitors of the pi-section filters are connected to metal earth planes which are held in the outer casing by a first releasable retention clip such as to be in electrical connection with the casing. The inner electrodes of the capacitors are connected to associated ones of the terminations by way of respective contact clips which enable relative displacement of the capacitors and terminations for purposes of assembly and disassembly.
    Type: Grant
    Filed: March 28, 1990
    Date of Patent: July 16, 1991
    Assignee: Oxley Developments Company Limited
    Inventors: Jeffrey Chambers, John C. Frodsham
  • Patent number: 4940429
    Abstract: A multi-way connector assembly comprising a tubular metal outer casing and a plurality of electrical lead-through terminations which extend through the outer casing, the terminations carrying respective annular discoidal filter capacitors whose outer electrodes are connected electrically to a ground plane in the form of a metal plate which is itself connected electrically to the outer metal casing. The inner electrodes of the capacitor are electrically coupled to the associated lead-through terminations by respective contact clips which enable relative displacement of the capacitors and terminations for purposes of assembly and disassembly, the metal plate forming the ground plane being held in electrical connection with the outer casing by means of a removable locking means.
    Type: Grant
    Filed: April 14, 1989
    Date of Patent: July 10, 1990
    Assignee: Oxley Developments Company Limited
    Inventors: Jeffrey Chambers, Trevor Armistead, John C. Frodsham