JPS55100509A - Fire-retardant optical cable - Google Patents

Fire-retardant optical cable

Info

Publication number
JPS55100509A
JPS55100509A JP757679A JP757679A JPS55100509A JP S55100509 A JPS55100509 A JP S55100509A JP 757679 A JP757679 A JP 757679A JP 757679 A JP757679 A JP 757679A JP S55100509 A JPS55100509 A JP S55100509A
Authority
JP
Japan
Prior art keywords
fire
cable
optical
retardant plastic
optical cable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP757679A
Other languages
Japanese (ja)
Inventor
Hiroshi Ishihara
Hiroyuki Kumamaru
Hiroshi Shinba
Osamu Nishi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Electric Industries Ltd
NTT Inc
Original Assignee
Nippon Telegraph and Telephone Corp
Sumitomo Electric Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp, Sumitomo Electric Industries Ltd filed Critical Nippon Telegraph and Telephone Corp
Priority to JP757679A priority Critical patent/JPS55100509A/en
Publication of JPS55100509A publication Critical patent/JPS55100509A/en
Pending legal-status Critical Current

Links

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Abstract

PURPOSE: To provide the cable which is safely protected even at extremely high temperatures and fire by disposing a cylindrical metal sheath to the inside of the fire-retardant plastic sheath of the optical cable core.
CONSTITUTION: Optical fiber cores 6 are aggregated in laminar form by way of intervening cords or copper clad wires 5 for communication on the tension body 4 placed at the center of the cable and further top-winding tapes 7 are applied thereon to constitute the optical cable core. Since a fire-retardant plastic sheath 9 and a cylindrical metal sheath 8 on the inside surface thereof are disposed, the heat and atmosphere upon the optical calbe may be cut off despite the elevation of ambient temperature and even if fire comes over the cable, the cable does not burn because it has the fire-retardant plastic sheath 9.
COPYRIGHT: (C)1980,JPO&Japio
JP757679A 1979-01-25 1979-01-25 Fire-retardant optical cable Pending JPS55100509A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP757679A JPS55100509A (en) 1979-01-25 1979-01-25 Fire-retardant optical cable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP757679A JPS55100509A (en) 1979-01-25 1979-01-25 Fire-retardant optical cable

Publications (1)

Publication Number Publication Date
JPS55100509A true JPS55100509A (en) 1980-07-31

Family

ID=11669627

Family Applications (1)

Application Number Title Priority Date Filing Date
JP757679A Pending JPS55100509A (en) 1979-01-25 1979-01-25 Fire-retardant optical cable

Country Status (1)

Country Link
JP (1) JPS55100509A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61124005U (en) * 1985-01-24 1986-08-05
JPS62204215A (en) * 1986-03-04 1987-09-08 Nippon Telegr & Teleph Corp <Ntt> Method for designing flame retardant cable
JPS63158513A (en) * 1987-12-10 1988-07-01 Hitachi Cable Ltd Water running prevention type optical fiber cable
JPH0285409U (en) * 1988-09-30 1990-07-04

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61124005U (en) * 1985-01-24 1986-08-05
JPS62204215A (en) * 1986-03-04 1987-09-08 Nippon Telegr & Teleph Corp <Ntt> Method for designing flame retardant cable
JPS63158513A (en) * 1987-12-10 1988-07-01 Hitachi Cable Ltd Water running prevention type optical fiber cable
JPH0285409U (en) * 1988-09-30 1990-07-04

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