GB2191871A - Optical fibre cable termination - Google Patents
Optical fibre cable termination Download PDFInfo
- Publication number
- GB2191871A GB2191871A GB08614283A GB8614283A GB2191871A GB 2191871 A GB2191871 A GB 2191871A GB 08614283 A GB08614283 A GB 08614283A GB 8614283 A GB8614283 A GB 8614283A GB 2191871 A GB2191871 A GB 2191871A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cable
- optical fibre
- bulkhead
- counterbored
- passageway
- 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
- G02B6/4401—Optical cables
- G02B6/4415—Cables for special applications
- G02B6/4427—Pressure resistant cables, e.g. undersea cables
- G02B6/4428—Penetrator systems in pressure-resistant devices
Abstract
Terminating an optical fibre 1 cable so as to permit the penetration of an optical fibre 1 through a bulkhead structure or the like, by stripping back the cable sheathing 4 at the end of the cable to expose a length of optical fibre 5 and portions of integral strengthening members 6 of the cable sheathing, inserting the exposed optical fibre and the stripped end of the cable sheathing through a counter bored member or structure 2, introducing bonding cement 7 into the counterbored end 3 of the passageway to effect bonding and sealing and preferably inserting a closure and fibre positioning slug 8. <IMAGE>
Description
SPECIFICATION
Improvements relating to optical fibre cable connecting terminating arrangements
This invention relates to optical fibre cable connecting/terminating methods and/or arrangements and relates more specifically to such arrangements facilitating termination of an optical fibre cable with penetration or passage of at least one optical fibre of the cable through a bulkhead or similar cable terminating structure.
According to the present invention a method of connecting or terminating an optical fibre cable comprises the steps of stripping back cable sheathing at the end of the cable to be terminated in order to expose a length of optical fibre and portions of axially-extending strengthening members integral with the cable sheathing, inserting the exposed length of optical fibre and the adjacent stripped end of the cable into a passageway of slightly larger diameter than the cable and extending.
through a cable receiving member or structure which is counterbored to enlarge said passageway at the end thereof remote from the position of entry of the optical fibre cable, introducing bonding cement into the counterbored end of the passageway to provide effective bonding and sealing within the cable receiving member or structure between the optical fibre, the portions of the strengthening members of the cable sheathing and the interior of the receiving member or structure and thereafter preferably inserting into the end of the counterbored passageway so that it abuts against the bonding cement a centrallyapertured closure and fibre centralising slug through which the exposed ends of the optical fibre extends.
In carrying out the present invention the cable receiving member or structure may be a bulkhead on which the cable is required to be terminated and through which the optical fibre or fibres will extend. However, it is more especially envisaged that the cable-receiving member will comprise a cable connecting device which can be detachably secured and sealed through a bulkhead structure so as to provide fluid-tight passage of the optical fibre through the bulkhead.
By way of example the present invention will now be described with reference to the accompanying drawings in which:
Figure 1 depicts one method of fixedly terminating an optical fibre cable at a bulkhead; and,
Figures 2 and 3 depict alternative methods for detachably terminating optical fibre cables at a bulkhead.
Referring to Figure 1 of the drawings this shows an optical fibre cable 1 fixedly terminated at a bulkhead (e.g. metal) 2. To achieve such termination whilst permitting an optical fibre within the cable to pass through the bulkhead 2 the bulkhead is provided with a counterbored hole 3 extending therethrough. The sheathing 4 of the optical fibre cable 1 is stripped back a short distance from the cable end as shown so that a length of optical fibre 5 projects from the cable with portions of metallic strengthening members embodied in the cable sheathing being left projecting as shown at 6.The stripped cable is inserted into the hole 3 from the narrower non-counterbored end thereof in which the sheath cable is a close fit so that the end of the optical fibre 5 projects from the counterbored end of the hole and the metal strengthening members 6 are located within the counterbored part of the hole, as shown.
A bonding cement 7 (e.g. epoxy resin) is then introduced into the counterbored end of the hole 3 so that the projecting lengths of cable strengthening members 6 and the short length of the optical fibre 5 are embedded in the cement which serves to bond these components together and to the bulkhead 2 and effectively sealing the bulkhead where the optical cable 1 is terminated and the optical fibre extends therethrough.
Finally, a centrally-apertured metallic slug 8 is inserted into the counterbored end of the hole 3 so that it abuts the epoxy resin bonding cement 7 as shown in the drawing, with the optical fibre 5 extending through the central hole provided in the metallic slug.
Referring to Figure 2, this depicts a method of detachably terminating an optical cable at a bulkhead. In this embodiment the optical cable
1 is sealingly secured to a cable connecting device 9 which comprises a cylindrical body member 10 having a radial flange 11 and a hole extending through the body of similar configuration to that provided at 3 in the bulkhead of Figure 1. The optical fibre cable 1 is prepared and attached to the body member
10 in the same way as the cable 1 is attached to the bulkhead 2 in the Figure 1 arrangement.The outer periphery of the body member may be screw-threaded as shown at
12 so that it can be passed through a hole 13 in the bulkhead and a securing nut 14 and washer 15 attached to the device and tightened in order to draw the flange 11 of the device towards the bulkhead 2 with the intervention of a bonded seal 16 therebetween to effect sealing between the device and the bulkhead where the cable connection is made. In an alternative arrangement the hole 13 through the bulkhead 2 could also be suitably screwthreaded which would allow the fixing nut 14 and washer 15 to be dispensed with.
In Figure 3 a modified arrangement is shown in which the cable connecting device is detachably secured to the bulkhead by means of fixing screws 17 and 18 which pass through holes in the flange 11 of the device and screw into threaded blind holes 20 in the bulkhead. Once again a bonded seal 16 provides sealing between the device and the bulkhead as the fixing screws 17 and 18 are tightened in order to draw the flange 11 of the device towards the bulkhead 2.
Claims (5)
1. A method of terminating an optical fibre cable so as to permit the penetration of an optical fibre through a bulkhead structure or the like, comprising the steps of stripping back cable sheathing at the end of the cable to be terminated in order to expose a length of optical fibre and portions of integral strengthening members of the cable sheathing, inserting the exposed length of optical fibre and the stripped end of the cable into a passageway extending through a cable-receiving member or structure which is counterbored to enlarge said passageway at the end thereof remote from the point of entry of the cable, introducing bonding cement into the counterbored end of the passageway to effect bonding and sealing within the cable receiving member or structure between the optical fibre the strengthening members of the cable sheathing and the interior of the receiving structure and thereafter preferably inserting into the end of the counterbored passageway so that it abuts against the bonding cement a centrally-apertured closure and fibre positioning slug through which the exposed end of the optical fibre extends.
2. A method of terminating an optical fibre cable as claimed in claim 1, in which the cable-receiving structure comprises a flanged cylindrical device through which the counterbored passageway extends and which is screw-threaded to enable the device to be secured to a bulkhead by means of a fixing nut arrangement or by inter-engagement between the threaded part of the device and a threaded hole in the bulkhead.
3. A method of teminating an optical fibre cable as claimed in claim 1, in which the cable-receiving structure comprises a flanged cylindrical device through which the counterbored passageway extends and which is secured through a suitable hole in the bulkhead by means of one or more fixing screws extending through the flange of the device and engaging screw-threaded holes in the bulkhead.
4. A method of terminating an optical fibre cable as claimed in claim 2 or claim 3, in which a bonded seal is provided on the cablereceiving structure which provides effective sealing between the cable-receiving structure and the bulkhead as the fixing nut or fixing screws are tightened.
5. A cable-terminating arrangement substantially as hereinbefore described with reference to any of the Figures 1 to 3 of the accompanying drawing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8614283A GB2191871B (en) | 1986-06-12 | 1986-06-12 | Improvements relating to optical fibre cable termination |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8614283A GB2191871B (en) | 1986-06-12 | 1986-06-12 | Improvements relating to optical fibre cable termination |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8614283D0 GB8614283D0 (en) | 1986-07-16 |
| GB2191871A true GB2191871A (en) | 1987-12-23 |
| GB2191871B GB2191871B (en) | 1989-12-06 |
Family
ID=10599337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8614283A Expired GB2191871B (en) | 1986-06-12 | 1986-06-12 | Improvements relating to optical fibre cable termination |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2191871B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2203859A (en) * | 1987-04-21 | 1988-10-26 | Preformed Line Products Co | Resin encapsulating fiber optic cable where it passes through housing wall |
| US4948222A (en) * | 1988-12-05 | 1990-08-14 | Aster Corporation | Optical fiber unit assembly package |
| CN114035278A (en) * | 2021-09-30 | 2022-02-11 | 中天科技海缆股份有限公司 | Optical fiber connecting device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4168109A (en) * | 1977-05-18 | 1979-09-18 | Kabel-Und Metallwerke Gutehoffnungshuette Ag | Fiber optic connector apparatus with optical fibers having thermally deformable jacket material |
| GB2049220A (en) * | 1979-05-09 | 1980-12-17 | Bunker Ramo | Optical fiber terminator and means and method for centering optical fiber |
-
1986
- 1986-06-12 GB GB8614283A patent/GB2191871B/en not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4168109A (en) * | 1977-05-18 | 1979-09-18 | Kabel-Und Metallwerke Gutehoffnungshuette Ag | Fiber optic connector apparatus with optical fibers having thermally deformable jacket material |
| GB2049220A (en) * | 1979-05-09 | 1980-12-17 | Bunker Ramo | Optical fiber terminator and means and method for centering optical fiber |
Non-Patent Citations (1)
| Title |
|---|
| WO 84/00069 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2203859A (en) * | 1987-04-21 | 1988-10-26 | Preformed Line Products Co | Resin encapsulating fiber optic cable where it passes through housing wall |
| GB2203859B (en) * | 1987-04-21 | 1991-06-12 | Preformed Line Products Co | Encapsulated fiber optic closure and method of encapsulating same |
| US4948222A (en) * | 1988-12-05 | 1990-08-14 | Aster Corporation | Optical fiber unit assembly package |
| CN114035278A (en) * | 2021-09-30 | 2022-02-11 | 中天科技海缆股份有限公司 | Optical fiber connecting device |
| CN114035278B (en) * | 2021-09-30 | 2023-03-07 | 中天科技海缆股份有限公司 | Optical fiber connecting device |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2191871B (en) | 1989-12-06 |
| GB8614283D0 (en) | 1986-07-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19930612 |