Patents by Inventor Paul Spedding

Paul Spedding 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).

  • Lens mounting comprising at least three circumferentially spaced bearings
    Patent number: 5847886
    Abstract: An arrangement (10) for mounting a lens for axial movement comprises a housing (12) defining an axially extending bearing surface (14) and a lens carriage (16) including least three circumferentially spaced bearings (20, 21, 22) in contact with the bearing surface (14) and permitting axial movement of the carriage (16) relative to the housing (12). One of the bearings (20) is biassed towards the bearing surface (14). In use, the arrangement (10) maintains a three-point contact between the lens carriage (16) and the bearing surface (14) despite geometrical variations in the surface.
    Type: Grant
    Filed: May 2, 1997
    Date of Patent: December 8, 1998
    Assignee: Pilkington P.E. Limited
    Inventors: Paul Spedding, George Hood