Patents by Inventor David N. Ridgeway

David N. Ridgeway 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).

  • Variable attenuator for optical fiber applications
    Patent number: 6810196
    Abstract: A fiber optic cable suitable for blowing into and through ducts containing pressurized gas, such as natural gas, has the fibers therein arranged in arrays that form longitudinally extending vents. The vents are blocked from transmission of any gas by each being filled with a compliant member which assumes the cross-sectional shape of the vents thereby blocking it. In a second embodiment of the invention, the first and third ferrules are fixed within the housing with their offset bores in alignment. A second ferrule is interposed between the first and third ferrules and is mounted in a rotatable member for misaligning the bore in the second ferrule with the bores in the first and third ferrule to produce attenuation of a signal passing through the ferrules by misaligning the fibers contained in the bores.
    Type: Grant
    Filed: November 6, 2003
    Date of Patent: October 26, 2004
    Assignee: Fitel USA Corp.
    Inventors: Sean L. Jones, Francis G. McCormack, David N. Ridgeway, Ian A. White
  • Variable attenuator for optical fiber applications
    Publication number: 20040096178
    Abstract: A fiber optic cable suitable for blowing into and through ducts containing pressurized gas, such as natural gas, has the fibers therein arranged in arrays that form longitudinally extending vents. The vents are blocked from transmission of any gas by each being filled with a compliant member which assumes the cross-sectional shape of the vents thereby blocking it.
    Type: Application
    Filed: November 6, 2003
    Publication date: May 20, 2004
    Inventors: Sean L. Jones, Francis G. McCormack, David N. Ridgeway, Ian A. White