Patents by Inventor Roger S. Preston

Roger S. Preston 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 assemblies for blown installation
    Patent number: 5533164
    Abstract: An optical fibre assembly 10 for blown installation, comprises a fibre unit 12 having at least one optical fibre 14. The unit has a coating comprising an external layer 18 of a material containing hollow glass beads 22 at least some of which project from the outer surface 24 of the external layer. The coating also has an inner, buffer layer 16 of a material having a lower modulus of elasticity than that of the material of the external layer and an intermediate layer 20 of material disposed between the external and inner layers.
    Type: Grant
    Filed: September 30, 1994
    Date of Patent: July 2, 1996
    Assignee: Pirelli General plc
    Inventors: Roger S. Preston, David B. Smith
  • Method and apparatus for contaminant removal in manufacturing optical fibre
    Patent number: 4988374
    Abstract: An extrnal fibre drawing furnace is maintained at or close to its normal working temperature while contaminants are removed between fibre pulls. Either a removable insert, replaceable gas port assembly, or cleanable gas transfer duct, enable this to be achieved while the furnace is maintained at or near its operating temperature, so that the down time is of the order of minutes rather than hours.
    Type: Grant
    Filed: November 14, 1988
    Date of Patent: January 29, 1991
    Assignee: STC PLC
    Inventors: Ian D. Harding, Peter R. Ince, Roger S. Preston