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:
Mar. 26, 1991
Filed:
Jan. 30, 1990
Applicant:
Inventor:
David M Beresford, Palmers Green, GB;
Assignee:
Telephone Cables Limited, , GB;
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350 9623 ;
Abstract
A submarine cable having an optical fibre core includes, as a longitudinal strength member of the core, a thermotropic plastics tube (8) having a generally rectangular-section longitudinal central passage and encased in a protective sheath (4), and at least one optical fibre ribbon (6), whose width is slightly less than the width of the passage, housed loosely within the passage, the ribbon (6) thereby being constrained to undulate in two dimensions in a longitudinal plane normal to its major surfaces. Preferably the tube (8) has a thickness substantially smaller than its width, so that its outer surface is also generally rectangular in section.