Patents by Inventor Geoffrey Alan Cranch

Geoffrey Alan Cranch 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).

  • Optical fibre sensors mounted on a cable
    Patent number: 7345952
    Abstract: An optical sensor assembly including a coupler and an optical fibre coil. The coupler is attached to the central member of the cable at a position where outer layers of the cable been removed. A first terminal of the coupler is connected to an optical fibre traveling along the cable in a fibre conduit external to the central strength member. A second terminal of the coupler is connected to a first end of the coil and a third terminal of the coupler is connected to an optical fibre a mirrored end. The coil is supported about a tubular mandrel, which mandrel fits over the cable. The other end of the coil is attached to the fibre in the cable. The mandrel is located about the cable at a position covering the coupler and the part of the cable where the outer layers are removed.
    Type: Grant
    Filed: February 6, 2003
    Date of Patent: March 18, 2008
    Assignee: Qinetiq Limited
    Inventors: Philip John Nash, Jonathan James Westhall, Geoffrey Alan Cranch, Michael Steven Henshaw, John Anstiss Churchill