Non-metallic self-supporting aerial optical cable

• US 4,662,712 A
• Filed: 12/19/1983
• Issued: 05/05/1987
• Est. Priority Date: 12/18/1982
• Status: Expired due to Term

• Current Assignee: Sumitomo Electric Industries Limited (Sumitomo Corporation), Kitanihon Electric Cable Co., Ltd. (Tohoku Electric Power Company Incorporated)
• Original Assignee: Sumitomo Electric Industries Limited (Sumitomo Corporation), Kitanihon Electric Cable Co., Ltd. (Tohoku Electric Power Company Incorporated), Tohoku Electric Power Company Incorporated
• Inventors: Tabata, Yusuke, Kurosawa, Akira, Omori, Toshiyuki, Hashimoto, Toshitomo, Horima, Hiroaki, Hayasaka, Eiji
• Primary Examiner(s): Sikes, William L.
• Assistant Examiner(s): Ullah, Akm E.
• Application Number:
  US06/562,883
• Time in Patent Office: 1,233 Days
• Field of Search: 350/96.23, 170/68 R, 170/70 A
• US Class Current: 385/102
• CPC Class Codes: G02B 6/4422 of the overhead type

Abstract

A non-metallic self-supporting aerial optical cable is comprised of a suspension wire and optical cable which are made of non-metallic material and have non-metallic sheaths. The optical cable and suspension wire are maintained substantially parallel by a number of spaced apart connecting members. The optical cable is allowed to sag between the connecting members in order to withstand tensile forces which result from wind, snow and the like.

Claims

1. In an aerial optical cable suspension system of the type comprising a suspension wire, an optical cable and a plurality of spaced support means for hangingly supporting said optical cable from said suspension wire such that said optical cable extends substantially parallel to said suspension wire, said spaced support means securing said optical cable to said suspension wire at respective spaced locations, wherein the improvement comprises:

an optical cable, the length of said optical cable between successive support means being greater than the length of said suspension wire between said successive support means to thereby provide slack in said optical cable whereby an elongation of said suspension wire results in a lesser elongation of said optical cable.

2. An aerial optical cable, as claimed in claim 1 wherein said suspension wire is comprised of non-metallic components.

3. An aerial optical table as claimed in claim 1, wherein said optical cable is comprised of non-metallic components.

4. An aerial optical cable, as claimed in claim 1, wherein said support means is comprised of non-metallic material.

5. An aerial optical cable, as claimed in claim 1, wherein said length of said optical cable between successive support means is 0.2-2.0% greater than said length of said suspension wire between those successive support means.

6. An aerial optical cable, as claimed in claim 1, wherein said support means is formed integrally with said optical cable and said suspension wire.

7. An aerial optical cable, as claimed in claim 1, said optical cable having a first sheath, said suspension wire having a second sheath and wherein said support means and said first and second sheaths are comprised of plastic materials.