GB2305258A - Optic fibre splice enclosure with ducted tubes for fibres - Google Patents
Optic fibre splice enclosure with ducted tubes for fibres Download PDFInfo
- Publication number
- GB2305258A GB2305258A GB9518992A GB9518992A GB2305258A GB 2305258 A GB2305258 A GB 2305258A GB 9518992 A GB9518992 A GB 9518992A GB 9518992 A GB9518992 A GB 9518992A GB 2305258 A GB2305258 A GB 2305258A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tubes
- ducts
- optical fibre
- splice enclosure
- fibre splice
- 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.)
- Granted
Links
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
- G02B6/4439—Auxiliary devices
- G02B6/4459—Ducts; Conduits; Hollow tubes for air blown fibres
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
- H02G3/0462—Tubings, i.e. having a closed section
- H02G3/0481—Tubings, i.e. having a closed section with a circular cross-section
-
- 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
- G02B6/4439—Auxiliary devices
- G02B6/444—Systems or boxes with surplus lengths
- G02B6/4441—Boxes
- G02B6/4446—Cable boxes, e.g. splicing boxes with two or more multi fibre cables
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Coupling Of Light Guides (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
An optical fibre splice enclosure comprises a plurality of tubes 13,15 through which optical fibres pass between incoming and outgoing cables 12,14 and one or more splice storage means 10. Each of the tubes is divided internally into a plurality of separate ducts.
Description
Optical fibre splice enclosures
The present invention relates to optical fibre splice enclosures.
It is common, in optical fibre splice enclosures, for optical fibres to pass through flexible tubes between the ends of the incoming and outgoing cables and the trays or other substrates on which the splices are mounted. Usually each cable comprises a plurality of groups or units of fibres, each such group or unit consisting of typically eight fibres: in order to keep the individual groups or units separate from each other, each tube accommodates one unit only. This often involves use of a relatively large number of tubes to carry the optical fibres between the incoming or outgoing cables and the splice storage trays, in turn occupying a large amount of space.
We have now devised an arrangement which enables a reduction in the number of fibre-carrying tubes which are used.
In accordance with this invention, there is provided an optical fibre splice enclosure, comprising a plurality of tubes through which optical fibres pass between incoming and outgoing cables and one or more splice storage means, each of said tubes being divided internally into a plurality of separate ducts.
For example, each tube may be divided internally into two, three or four separate ducts. Each duct preferably accommodates one group or unit of fibres. As a result, each tube carries a number of fibre units, and substantially fewer tubes are required than if each tube carried one fibre unit only.
Furthermore, each tube is resistant to kinking when bent, and resistant to being crushed, because of the strength provided by its internal partitioning.
An embodiment of this invention will now be described by way of example only and with reference to the accompanying drawings in which:
FIGURE 1 is a schematic diagram showing fibre carrying tubes extending between incoming and outgoing cables and a splice storage tray in an optical fibre splice enclosure; and
FIGURE 2 is an enclosed cross-section on the line X-X shown in Figure 1.
Referring to Figure 1 of the drawings, there is shown a tray 10 for receiving optical fibre splices, in an optical fibre splice closure: also shown are incoming and outgoing cables 12,14, each comprising a plurality of optical fibres arranged in groups or unit of typically eight fibres each. The fibres of the incoming cable 12 pass through flexible, extruded plastics tubes e.g. 13 which extend from the end of the cable 12 to an entry of the tray 10, and the outgoing fibres pass through tubes e.g. 15 which extend from an exit of the tray 10 to the end of the outgoing cable 14.
In accordance with this invention, each of the tubes 13, 15 is internally partitioned into a number of separate ducts, four in the example shown. In use, one group or unit of fibres (typically eight fibres) is installed through each of the separate ducts of each tube 13, 15. With this arrangement, each tube accommodates a number of units of fibres, equal to the number of its separate ducts, so that a reduced number of tubes is required as compared with prior art arrangements (in which a separate tube is required for each unit of fibres). Further, the tubes 13, 15 are relatively resistant to kinking when bent, because of the strength provided to them by their internal partitions.
At their ends adjacent the cables 12 or 14, the tubes 13, 15 may have their ducts radially expanded, as indicated in the drawing. Alternatively, separate tapered manifold components may be provided, through which the fibres pass from the cables and into the ducts of the tubes 13, 15.
If desired, the end portion of each tube 13, 15 may be longitudinally split, for example to divide the tube into two pairs of ducts or even four individual ducts to facilitate passage of the fibres from the cables and into the ducts.
Whilst the tubes 13, 15 have been shown partitioned into four separate ducts, they may in general have any desired number of ducts, most typically two, three or four.
Claims (8)
1) An optical fibre splice enclosure, comprising a plurality of tubes through which optical fibres pass between incoming and outgoing cables and one or more splice storage means, each of said tubes being divided internally into a plurality of separate ducts.
2) An optical fibre splice enclosure as claimed in Claim 1, wherein said ducts are radially expanded at the ends of said tubes adjacent said cables.
3) An optical fibre splice enclosure as claimed in Claim 1 or Claim 2, comprising tapered manifolds at the ends of said tubes, through which manifolds said optical fibres pass from said cables and into said ducts.
4) An optical fibre splice enclosure as claimed in any preceding claim, wherein the end portion of each said tube is longitudinally split to separate two or more ducts or sets of ducts to facilitate the passage of said optical fibres from said cables and into said ducts.
5) An optical fibre splice enclosure as claimed in any preceding claim, wherein each of said tubes is divided internally into two separate ducts.
6) An optical fibre splice enclosure as claimed in any of claims 1 to 4, wherein each of said tubes is divided internally into three separate ducts.
7) An optical fibre splice enclosure as claimed in any of claims 1 to 4, wherein each of said tubes is divided internally into four separate ducts.
8) An optical fibre splice enclosure substantially as herein described with reference to the accompanying drawings.
8) An optical fibre splice enclosure substantially as herein described with reference to the accompanying drawings.
Amendments to the claims have been filed as follows 1) An optical fibre splice enclosure, comprising a plurality of tubes through which optical fibres pass between incoming and outgoing cables and one or more splice storage means, said tubes being components separate from said cables and each of said tubes being divided internally into a plurality of separate ducts.
2) An optical fibre splice enclosure as claimed in Claim 1, wherein said ducts are radially expanded at the ends of said tubes adjacent said cables.
3) An optical fibre splice enclosure as claimed in Claim 1 or Claim 2, comprising tapered manifolds at the ends of said tubes adjacent said cables, through which manifolds said optical fibres pass from said cables and into said ducts.
4) An optical fibre splice enclosure as claimed in any preceding claim, wherein the end portion of each said tube, adjacent its respective cable, is longitudinally split to separate two or more ducts or sets of ducts to facilitate the passage of said optical fibres from said cables and into said ducts.
5) An optical fibre splice enclosure as claimed in any preceding claim, wherein each of said tubes is divided internally into two separate ducts.
6) An optical fibre splice enclosure as claimed in any of claims 1 to 4, wherein each of said tubes is divided internally into three separate ducts.
7) An optical fibre splice enclosure as claimed in any of claims 1 to 4, wherein each of said tubes is divided internally into four separate ducts.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9518992A GB2305258B (en) | 1995-09-16 | 1995-09-16 | Optical fibre splice enclosures |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9518992A GB2305258B (en) | 1995-09-16 | 1995-09-16 | Optical fibre splice enclosures |
Publications (3)
Publication Number | Publication Date |
---|---|
GB9518992D0 GB9518992D0 (en) | 1995-11-15 |
GB2305258A true GB2305258A (en) | 1997-04-02 |
GB2305258B GB2305258B (en) | 1999-03-31 |
Family
ID=10780844
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9518992A Expired - Fee Related GB2305258B (en) | 1995-09-16 | 1995-09-16 | Optical fibre splice enclosures |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2305258B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2368137A (en) * | 2000-10-17 | 2002-04-24 | Spirent Plc | Optic fibre splice storage apparatus with tube engagement device |
CN101227072B (en) * | 2007-11-29 | 2010-06-02 | 浙江八方电信有限公司 | Cable textile sub tube |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0408266A2 (en) * | 1989-07-11 | 1991-01-16 | BICC Public Limited Company | Termination system for optical fibres |
US5239609A (en) * | 1992-03-03 | 1993-08-24 | Porta Systems Corp. | Means for routing buffer tube type fiber optical cable |
-
1995
- 1995-09-16 GB GB9518992A patent/GB2305258B/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0408266A2 (en) * | 1989-07-11 | 1991-01-16 | BICC Public Limited Company | Termination system for optical fibres |
US5239609A (en) * | 1992-03-03 | 1993-08-24 | Porta Systems Corp. | Means for routing buffer tube type fiber optical cable |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2368137A (en) * | 2000-10-17 | 2002-04-24 | Spirent Plc | Optic fibre splice storage apparatus with tube engagement device |
CN101227072B (en) * | 2007-11-29 | 2010-06-02 | 浙江八方电信有限公司 | Cable textile sub tube |
Also Published As
Publication number | Publication date |
---|---|
GB2305258B (en) | 1999-03-31 |
GB9518992D0 (en) | 1995-11-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20030916 |