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:
Nov. 29, 1988
Filed:
Sep. 18, 1987
Applicant:
Inventors:
Yoshinobu Kitayama, Kanagawa, JP;
Yasunori Saito, Kanagawa, JP;
Assignee:
Sumitomo Electric Industries, Ltd., Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350 9623 ; 350 9630 ; 350 9634 ;
Abstract
A composite optical fiber overhead cable having improved long-term strength and loss characteristics. A plurality of optical fibers are accommodated in spiral grooves of the spacer around which conductor strands are wound. The fibers contain flourine in at least one of the core and cladding layers thereof. Each of the optical fibers is provided with a surrounding hermetic coat, and a heat-resistant elastic material is filled between each optical fiber and the bottom of its respective groove to restrain movement of the optical fibers in the grooves in the longitudinal direction.