Cable joint

• US 5,241,611 A
• Filed: 05/20/1992
• Issued: 08/31/1993
• Est. Priority Date: 10/04/1989
• Status: Expired due to Fees

• Current Assignee: British Telecommunications PLC (BT Group PLC)
• Original Assignee: British Telecommunications PLC (BT Group PLC)
• Inventors: Gould, Colin A.
• Primary Examiner(s): FONT, FRANK G
• Application Number:
  US07/858,972
• Time in Patent Office: 468 Days
• Field of Search: 385/69, 385/70, 385/71, 385/75, 385/86, 385/87, 385/99, 174/89, 174/70 R, 174/70 S, 174/71 R, 174/72 R, 174/72 A, 174/72 C
• US Class Current: 385/70
• CPC Class Codes: G02B 6/2558 Reinforcement of splice joint
• CPC Class Codes: G02B 6/4428 Penetrator systems in pressure-resistant devices
• CPC Class Codes: G02B 6/4439 Auxiliary devices
• CPC Class Codes: G02B 6/4471 Terminating devices demountable connectors G02B6/3807; Cable clamps

Abstract

A cable joint for joining the ends of two optical fibre cables, each having a core of optical fibres (12) and a king wire (14) surrounded by armor wire (17) and an outer sheath (18), comprises an insert (20) between the core and the armor wire of each cable and a protective sleeve (38) swaged directly to the armor wire braced by the insert. The directly engaged sleeve provides a simple, efficient joint. An over-moulded cover (40) seals the joint.

Claims

1. A cable joint assembly for use between the ends of cables which each have an inner core including components which are to be connected together and a tensile element surrounding the core, the assembly comprising:

a pair of anchor means, each being secured, in use, to the tensile element of a cable end, and

a sleeve extending between cable ends,

the connected core components being housed within the sleeve which is secured directly to the tensile elements of each cable end.

2. An assembly as in claim 1 in which at least part of the anchor means include a unitary portion of said sleeve.

3. An assembly as in claim 1 in which at least part of the anchor means are constituted by an end of the sleeve.

4. An assembly as in claim 1 in which the end of the sleeve is swaged into engagement with the tensile element.

5. An assembly as in claim 1 in which said anchor means comprise an insert received between the tensile element and the core at each cable end.

6. An assembly as in claim 1 in which the anchor means comprise a separate anchoring device connected to each cable.

7. An assembly as in claim 1 in which the sleeve is rigid.

8. An assembly as in claim 1 in which the sleeve is covered by a sealing sheath.

9. An assembly as in claim 8 in which the sealing sheath extends axially outwardly beyond the anchor means sealingly to engage the end of each cable.

11. An assembly as in claim 1 in which the core components comprise optical fibres.

10. A cable joint assembly for use between the ends of cables which each have an inner core including components which are to be connected together and a tensile element surrounding the core, the assembly comprising:

a pair of anchor means, each secured, in use, to the tensile element of a cable end, and

a sleeve extending between cable ends,

the connected core components being housed within the sleeve which is secured directly to the tensile element,

the sleeve being covered with a sealing sheath which extends axially outwardly beyond the anchor means sealingly to engage the end of each cable, and

in which the sheath comprises a preformed member and an over moulding at each end sealing the member to each cable end.

12. A cable joint assembly for use between the ends of cables which each have an inner core including components which are to be connected together and a tensile element surrounding the core, the assembly comprising:

a pair of anchor means, each secured, in use, to the tensile element of a cable end, and

a sleeve extending between cable ends,

the connected core components being housed within the sleeve which is secured directly to the tensile element,

in which the sleeve is threadedly secured to the anchor means.

13. A cable joint assembly for use between the ends of cables which each have an inner core including components which are to be connected together and a tensile element surrounding the core, the assembly comprising:

a pair of anchor means, each secured, in use, to the tensile element of a cable end, and

a sleeve extending between cable ends,

the connected core components being housed within the sleeve which is secured directly to the tensile element,

in which one of the sleeve and anchor means is formed with a first abutment which co-operates with a second abutment on the other of the sleeve and anchor means to secure the sleeve to the anchor means by axial movement of the abutments past one another and relative angular movements thereof to engage the abutments.

14. A method of joining two cables having an inner core and associated core elements, said method comprising:

passing a joining sleeve along one cable;

terminating the ends of each of the cables in a respective anchor;

thereafter connecting the core elements of the cables; and

thereafter passing the sleeve back over a first termination and engaging the sleeve directly with both anchors to cover the connected core elements.

15. A method as in claim 14 in which the cable ends are mounted a prescribed distance apart in a jig.

16. A cable joint assembly for use between cables which each have an inner core, the joint assembly including a number of components, at least some of which are connected together, and tensile elements surrounding the cores, in use, the assembly comprising:

anchor means secured at the cable ends to the tensile elements and

a sleeve extending between cable ends,

the connected core components being housed within the sleeve,

the sleeve being secured directly to the tensile elements, and

the anchor means also having means for securing the inner cores.

17. An assembly as in claim 16 in which at least part of the anchor means are constituted by an end of the sleeve.

18. An assembly as in claim 17 in which each end of the sleeve is swaged into engagement with the respective tensile element.

19. An assembly as in claim 16 in which the anchor means comprise inserts received between the tensile elements and the cores.

20. An assembly as in claim 16 in which the anchor means comprise a separate anchoring device connected to each cable.

21. An assembly as in claim 16 in which the sleeve is rigid.

22. An assembly as in claim 16 in which the sleeve is covered by a sealing sheath.

23. An assembly as in claim 22 in which the sealing sheath extends axially beyond the anchor means sealingly to engage the end of each cable.

24. An assembly as in claim 16 in which the sheath comprises a preformed member and an over moulding at each end sealing the member to each cable end.

25. An assembly as in claim 16 in which the core components comprise optical fibres.

26. An assembly as in claim 16 in which the sleeve is threadedly secured to the anchor means.

27. An assembly as in claim 16 in which one of the sleeve and anchor means is formed with a first abutment which co-operates with a second abutment on the other of the sleeve and anchor means to secure the sleeve to the anchor means by axial movement of the abutments past one another and relative angular movements thereof to engage the abutments.

28. A method of joining two cables, each having an inner core and core elements, said method comprising:

passing the joining sleeve along one cable;

terminating the ends of the cables in respectively associated anchor;

securing the inner cores of each cable to its anchor;

interconnecting the core elements; and

passing the sleeve back over the terminations of the ends of the cables in the anchors and engaging the sleeve directly with both tensile elements to cover the connected core elements.

29. A method as in claim 28 in which the cable ends are mounted a prescribed distance apart in a jig.