NO147085B - TELECOMMUNICATIONS CABLE - Google Patents
TELECOMMUNICATIONS CABLE Download PDFInfo
- Publication number
- NO147085B NO147085B NO754292A NO754292A NO147085B NO 147085 B NO147085 B NO 147085B NO 754292 A NO754292 A NO 754292A NO 754292 A NO754292 A NO 754292A NO 147085 B NO147085 B NO 147085B
- Authority
- NO
- Norway
- Prior art keywords
- elements
- strain
- telecommunications cable
- absorbing elements
- optical fibers
- Prior art date
Links
- 239000013307 optical fiber Substances 0.000 claims description 10
- 230000001681 protective effect Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 230000003287 optical effect Effects 0.000 claims description 5
- 229920001169 thermoplastic Polymers 0.000 claims description 5
- 239000004416 thermosoftening plastic Substances 0.000 claims description 5
- -1 polypropylene Polymers 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 239000004677 Nylon Substances 0.000 claims description 2
- 229920001778 nylon Polymers 0.000 claims description 2
- 239000012815 thermoplastic material Substances 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 1
- 229920003235 aromatic polyamide Polymers 0.000 claims 1
- 229910052799 carbon Inorganic materials 0.000 claims 1
- 239000000835 fiber Substances 0.000 description 5
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 229920002725 thermoplastic elastomer Polymers 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229920000265 Polyparaphenylene Polymers 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000006223 plastic coating Substances 0.000 description 1
- 125000001174 sulfone group Chemical group 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/443—Protective covering
- G02B6/4432—Protective covering with fibre reinforcements
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Cable Accessories (AREA)
- Communication Cables (AREA)
- Flexible Shafts (AREA)
Description
Foreliggende oppfinnelse angår en kabel med optiske fibre, The present invention relates to a cable with optical fibres,
og angår særlig oppbygningen av en forbedret beskyttelseskappe for slike kabler. and particularly concerns the construction of an improved protective sheath for such cables.
Oppbygningen av tidligere kjente beskyttelseskapper for bunter med optiske fibre har bestått av relativt tynne plastrør, for eksempel som beskrevet i US patent nr. 3.674.581, og flek-sible, flettede rør som beskrevet i US patent nr. 3.691.001. The structure of previously known protective sheaths for bundles of optical fibers has consisted of relatively thin plastic tubes, for example as described in US patent no. 3,674,581, and flexible, braided tubes as described in US patent no. 3,691,001.
Slike strukturer har imidlertid ikke vist seg å gi tilstrekkelig beskyttelse for ekstremt tynne og lange optiske fibre av silisiumoksyd som benyttes i transmisjonslinjer med spesielt lave tap for telekommunikasjonsformål. However, such structures have not been shown to provide sufficient protection for extremely thin and long silicon oxide optical fibers used in transmission lines with particularly low losses for telecommunication purposes.
Bruken av langsgående strekkelementer og plastkapper er dessuten vanlig kjent i telekommunikasjons- og høyspenningskabler som inneholder isolerte, elektriske ledere. Slike metalliske ledere har imidlertid ikke samme sprøhet som glassfibre, som krever beskyttelsesmaterialer med en høy strekkstyrke og høy motstand mot slitasje og knusing, samtidig som de må være istand til å motstå ulike betingelser i omgivelsene. The use of longitudinal tensile elements and plastic sheaths is also commonly known in telecommunications and high-voltage cables containing insulated electrical conductors. However, such metallic conductors do not have the same brittleness as glass fibres, which require protective materials with a high tensile strength and high resistance to wear and crushing, while at the same time they must be able to withstand various environmental conditions.
Formålet med foreliggende oppfinnelse er derfor å tilveie-bringe en forbedret beskyttelseskappe for en kabel med optiske fibre, slik at kabelen får en høyere strekkfasthet og bedre motstand mot slitasje og knusing enn tidligere kjente optiske kabler. The purpose of the present invention is therefore to provide an improved protective sheath for a cable with optical fibres, so that the cable has a higher tensile strength and better resistance to wear and tear than previously known optical cables.
Dette oppnås ved å utforme kabelen i overensstemmelse med This is achieved by designing the cable in accordance with
de nedenfor fremsatte patentkrav. the patent claims set out below.
For å gi en klarere forståelse av foreliggende oppfinnelse, vises til nedenstående, detaljerte beskrivelse av flere utførel-seseksempler, samt til de ledsagende tegninger, hvor: To provide a clearer understanding of the present invention, reference is made to the detailed description below of several design examples, as well as to the accompanying drawings, where:
fig. 1 viser et tverrsnitt av en kabeltype med optiske fig. 1 shows a cross-section of a cable type with optical
fibre i henhold til foreliggende oppfinnelse, hvor strekkele-mentene er anbragt perifert omkring de optiske fibre, fibers according to the present invention, where the tension elements are placed peripherally around the optical fibers,
fig. 2 viser en ytterligere variasjon med både sentralt beliggende og perifert beliggende strekkelementer. fig. 2 shows a further variation with both centrally located and peripherally located tensile elements.
Som vist i fig. 1 er flere tettpakkede og tynne optiske fibre 10 av silisiumoksyd anbragt inne i to tett tilpassede mantler 12, 18 som er seige og har stor motstandstyrke mot knusing og slitasje og er fremstilt av et egnet termoplastisk materiale. Kappene kan for eksempel være fremstilt av polyvinylklorid, termoplastisk gummi, termoplastisk polyester, eller polypropylen. Polyvinylklorid og termoplastisk gummi foretrekkes på grunn av As shown in fig. 1, several densely packed and thin optical fibers 10 of silicon oxide are placed inside two tightly fitting sheaths 12, 18 which are tough and have great resistance to crushing and wear and are made of a suitable thermoplastic material. The covers can, for example, be made of polyvinyl chloride, thermoplastic rubber, thermoplastic polyester, or polypropylene. Polyvinyl chloride and thermoplastic rubber are preferred due to
sin seighet, fleksibilitet samt motstandstyrke mot knusing og slitasje, og er dessuten lite gjennomtrengelig for vann, og er lite påvirket av de fleste oppløsninger. Disse materialene kan også ekstruderes ved temperaturer så lave som 200°C, og derved unngås ødeleggelse av de tynne, beskyttende plastbelegg (cladding), på fibrene. its toughness, flexibility and resistance to crushing and wear, and is also not permeable to water, and is not affected by most solutions. These materials can also be extruded at temperatures as low as 200°C, thereby avoiding destruction of the thin, protective plastic coatings (cladding) on the fibers.
Strekkelementer 16 er anbragt perifert langs den ytre overflate av den indre kappe 18. Disse strekkelementer består av individuelle elementer med høy strekkstyrke, i form av kontinuer-lige, massive fibre eller snodde tråder. Foretrukkede materialer er aramidfiber, polypropylen, termoplastisk polyester, plastbe-lagt glassfiber og karbonfibre. Andre egnede materialer er polyarylsulfon, polyfenylensulfid og nylon. Oppbygningén som er vist i fig. 1 omfatter et perifert anbragt strekkelement 16 som er snodd omkring et indre termoplastisk rør 18 som inneholder de optiske fibrene 10. En ytre kappe 12 er ekstrudert utenpå strekk-elementene og det indre rør 18. Strekkelement 16 kan ha form av to motsatt rettede omviklinger som gir såvel torsjonsfrie forhold for kabelen og en høy motstand mot knusing. Dette reduserer dessuten strekket i de perifere elementene under bøying, men vil gi noe mindre fleksibilitet enn for den førstnevnte kabeltypen. Tensile elements 16 are arranged peripherally along the outer surface of the inner jacket 18. These tensile elements consist of individual elements with high tensile strength, in the form of continuous, massive fibers or twisted threads. Preferred materials are aramid fiber, polypropylene, thermoplastic polyester, plastic-coated glass fiber and carbon fibers. Other suitable materials are polyaryl sulphone, polyphenylene sulphide and nylon. The structure shown in fig. 1 comprises a peripherally arranged stretching element 16 which is twisted around an inner thermoplastic tube 18 which contains the optical fibers 10. An outer jacket 12 is extruded outside the stretching elements and the inner tube 18. Stretching element 16 can take the form of two oppositely directed windings which provides both torsion-free conditions for the cable and a high resistance to crushing. This also reduces the stretch in the peripheral elements during bending, but will give somewhat less flexibility than for the first-mentioned cable type.
Fig. 2 viser en mer komplisert oppbygning som omfatter et sammensatt strekkelement 24, som dels er arrangert som et separat, perifert lag, og som kan være et ekstrudert slitasjebestandig element, eller to lag med skrueformede, snodde fiberelementer omkring de indre, optiske fibrene 10 og dels som et langsgående, sentralt element som befinner seg midt inne i fiberbunten. Dette gir en ennå høyere motstand mot knusing enn de andre oppbygningene, men kabelen blir med en slik oppbygning noe mindre fleksibel. Fig. 2 shows a more complicated structure comprising a composite tensile element 24, which is partly arranged as a separate, peripheral layer, and which can be an extruded wear-resistant element, or two layers of helical, twisted fiber elements around the inner, optical fibers 10 and partly as a longitudinal, central element located in the middle of the fiber bundle. This gives an even higher resistance to crushing than the other structures, but the cable becomes somewhat less flexible with such a structure.
De indre deler 14 av det strekkopptagende element 24 kan også være jevnt fordelt mellom de optiske fibre. I denne ut-førelsen fås en svært jevn strekkfordeling over tverrsnittet. The inner parts 14 of the strain-absorbing element 24 can also be evenly distributed between the optical fibers. In this design, a very even strain distribution is obtained over the cross-section.
Claims (4)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US53613774A | 1974-12-24 | 1974-12-24 |
Publications (3)
Publication Number | Publication Date |
---|---|
NO754292L NO754292L (en) | 1976-06-25 |
NO147085B true NO147085B (en) | 1982-10-18 |
NO147085C NO147085C (en) | 1983-01-26 |
Family
ID=24137310
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO754292A NO147085C (en) | 1974-12-24 | 1975-12-17 | TELECOMMUNICATION CABLE. |
Country Status (8)
Country | Link |
---|---|
JP (1) | JPS51106448A (en) |
AU (1) | AU498613B2 (en) |
BR (1) | BR7508587A (en) |
CH (1) | CH599559A5 (en) |
FR (1) | FR2296192A1 (en) |
GB (1) | GB1462159A (en) |
IT (1) | IT1054686B (en) |
NO (1) | NO147085C (en) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1103494A (en) * | 1976-06-24 | 1981-06-23 | Dennis L. Lewis | Optical fibre cables and their manufacture |
GB1486764A (en) * | 1976-07-27 | 1977-09-21 | Standard Telephones Cables Ltd | Cable |
US4331378A (en) * | 1976-10-22 | 1982-05-25 | E. I. Du Pont De Nemours And Company | Reinforced optical fiber cable with glass or silica core |
USRE32436E (en) * | 1976-10-22 | 1987-06-09 | Mitsubishi Rayon Co., Ltd. | Reinforced optical fiber cable with glass or silica core |
US4147406A (en) * | 1976-10-26 | 1979-04-03 | Belden Corporation | Fiber optic cable |
JPS53144755A (en) * | 1977-05-23 | 1978-12-16 | Sumitomo Electric Ind Ltd | Optical cable and production of the same |
US4169657A (en) * | 1978-03-02 | 1979-10-02 | Akzona Incorporated | Laminated strength members for fiber optic cable |
US4241979A (en) * | 1979-01-18 | 1980-12-30 | Bell Telephone Laboratories, Incorporated | Optical communication cable with means for controlling coupling between cable jacket and strength members |
JPS56167108A (en) * | 1980-05-29 | 1981-12-22 | Sumitomo Electric Ind Ltd | Fiber for transmitting infrared light |
DE3024310C2 (en) * | 1980-06-27 | 1983-06-23 | Siemens AG, 1000 Berlin und 8000 München | Optical cable and process for its manufacture |
JPS5886501A (en) * | 1981-11-18 | 1983-05-24 | Nippon Telegr & Teleph Corp <Ntt> | Optical cable |
JPS58205110A (en) * | 1982-05-24 | 1983-11-30 | Nippon Telegr & Teleph Corp <Ntt> | Optical fiber cable |
DE3318233C2 (en) * | 1983-05-19 | 1985-10-31 | Philips Patentverwaltung Gmbh, 2000 Hamburg | Optical cable element or cable and method for its manufacture |
GB8505866D0 (en) * | 1985-03-07 | 1985-04-11 | Pearpoint Ltd | Semi-rigid rods |
JPS6212112U (en) * | 1985-07-05 | 1987-01-24 | ||
DE4324574C2 (en) * | 1992-12-16 | 1995-10-19 | Rheydt Kabelwerk Ag | Optical cable |
FR2725553B1 (en) * | 1994-10-07 | 1996-12-20 | Silec Liaisons Elec | PROCESS FOR PRODUCING A TUBULAR SHEATH COMPRISING FILIFORM CARRIERS, AND TUBULAR SHEATH OBTAINED |
US6519397B2 (en) * | 2001-06-01 | 2003-02-11 | Owens Corning Fiberglas Technology, Inc. | Premises cable with fiberglass reinforcement |
US20030091299A1 (en) * | 2001-11-14 | 2003-05-15 | Priest James R. | Crimp-style connector for fiber reinforced premise cable |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4911143A (en) * | 1972-05-29 | 1974-01-31 |
-
1975
- 1975-12-08 AU AU87338/75A patent/AU498613B2/en not_active Expired
- 1975-12-17 NO NO754292A patent/NO147085C/en unknown
- 1975-12-18 IT IT30439/75A patent/IT1054686B/en active
- 1975-12-18 GB GB5182375A patent/GB1462159A/en not_active Expired
- 1975-12-19 CH CH1647275A patent/CH599559A5/xx not_active IP Right Cessation
- 1975-12-23 BR BR7508587*A patent/BR7508587A/en unknown
- 1975-12-23 FR FR7539464A patent/FR2296192A1/en active Granted
- 1975-12-24 JP JP50153497A patent/JPS51106448A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
JPS51106448A (en) | 1976-09-21 |
FR2296192B1 (en) | 1982-04-02 |
AU8733875A (en) | 1977-06-16 |
AU498613B2 (en) | 1979-03-22 |
BR7508587A (en) | 1976-08-24 |
NO147085C (en) | 1983-01-26 |
GB1462159A (en) | 1977-01-19 |
NO754292L (en) | 1976-06-25 |
FR2296192A1 (en) | 1976-07-23 |
IT1054686B (en) | 1981-11-30 |
CH599559A5 (en) | 1978-05-31 |
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