The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 30, 1987
Filed:
Apr. 15, 1985
Paolo G Priaroggia, Milan, IT;
Societa' Cavi Pirelli S.p.A., , IT;
Abstract
A submarine cable with optical fibers which prevents damage to the fibers due to water pressure without the use of an external armor. The cable has a central strand which provides the cable tensile strength and which is surrounded by helically wound tubes which enclose the optical fibers. A layer of plastic material may be provided intermediate the tubes and the strand and the tubes are covered by a layer of plastic material in contact with the tubes. The layer of plastic material contacting the tubes is closely surrounded by a thin metal sheath which, in turn, is closely surrounded by a layer of plastic material. The tube and any spaces radially inwardly of the tubes are filled with a practically incompressible fluid, such as a grease or jelly. The strand may include a wire of good electrical conductivity which, with the sheath, may be used to supply electrical power to repeaters along the cable length.