Hybrid cable splice closure and related methods

• US 5,997,186 A
• Filed: 05/13/1998
• Issued: 12/07/1999
• Est. Priority Date: 05/13/1998
• Status: Expired due to Term

• Current Assignee: Commscope Emea Limited (CommScope Holding Company, Inc.), CommScope Technologies, LLC (CommScope Holding Company, Inc.)
• Original Assignee: Tyco Electronics Corporation (TE Connectivity Limited)
• Inventors: Blue, Kenton A., Holman, John R., Huynh, Van L., Nance, Mel B., Wilkinson, Randy D., Shimirak, Gerald Leo, Wood, Rhonda W.
• Primary Examiner(s): Ullah, Akm E.
• Application Number:
  US09/078,152
• Time in Patent Office: 573 Days
• Field of Search: 385/95-99, 385/147, 385/135, 439/395
• US Class Current: 385/99
• CPC Class Codes: G02B 6/3801 Permanent connections, i.e. wherein fibres are kept aligned by mechanical means splices by bonding G02B6/255; fusion splices G02B6/2551
• CPC Class Codes: G02B 6/4446 Cable boxes, e.g. splicing boxes with two or more multi fibre cables
• CPC Class Codes: G02B 6/44775 Cable seals e.g. feed-through cable seals integrated to the box seals G02B6/4444; pulling eyes G02B6/44465

Abstract

An in-line splice closure for splicing two hybrid fiber and signal conductor cables includes an outer housing having opposing first and second ends for receiving respective ends of the cables. An organizer tube extends within the outer housing. Electrical connectors are positioned within the organizer tube for connecting signal conductors of the first and second hybrid cables. The splice closure preferably includes at least one optical splice for connecting optical fibers of the first and second cables, and an optical fiber support wrapped around an outer surface of the organizer tube for supporting the at least one optical splice and adjacent optical fiber slack portions. The organizer tube preferably has a predetermined diameter and the optical fiber support preferably supports the optical fiber slack portions so as not to exceed the minimum bend radius. The organizer tube preferably has a longitudinally extending groove in an outer surface portion for receiving buffer tubes of the cables. The optical fiber support may comprise a flexible substrate for supporting the fibers. The flexible substrate may comprise a body of flexible compressible material having a disk or oval shape and having radially extending slits for receiving optical fiber slack portions. The flexible substrate may alternately include integrally formed guide portions.

Claims

1. An in-line splice closure for first and second hybrid cables each of a type including at least one optical fiber and at least one signal conductor, the in-line splice closure comprising:

an outer housing having opposing first and second ends for receiving respective ends of the first and second hybrid cables;

an organizer tube extending within said outer housing;

at least one electrical connector within said organizer tube for connecting signal conductors of the first and second hybrid cables;

at least one optical splice for connecting optical fibers of the first and second hybrid cables; and

optical fiber support means wrapped around an outer surface of said organizer tube for supporting the at least one optical splice and adjacent optical fiber slack portions.

2. An in-line splice closure according to claim 1 wherein the optical fibers have a minimum bend radius;

and wherein said organizer tube has a predetermined diameter and said optical fiber support means supports the optical fiber slack portions so as not to exceed the minimum bend radius.

3. An in-line splice closure according to claim 2 wherein the predetermined diameter of said organizer tube is greater than about one inch.

4. An in-line splice closure according to claim 1 wherein the first and second hybrid cables each further comprises a buffer tube surrounding the at least one optical fiber;

and wherein said organizer tube has a longitudinally extending groove in an outer surface portion for receiving the buffer tubes.

5. An in-line splice closure according to claim 1 wherein said organizer tube comprises a rigid material.

6. An in-line splice closure according to claim 1 wherein said organizer tube comprises a compressible foam material.

7. An in-line splice closure according to claim 1 wherein said organizer tube has a longitudinally extending slit therein to facilitate opening and positioning of said organizer tube.

8. An in-line splice closure according to claim 7 wherein said organizer tube comprises a longitudinally extending hinge opposite the longitudinally extending slit.

9. An in-line splice closure according to claim 1 wherein said optical fiber support means comprises a flexible substrate.

10. An in-line splice closure according to claim 9 wherein said optical fiber support means further comprises at least one flexible sheet covering said flexible substrate.

11. An in-line splice closure according to claim 9 wherein said flexible substrate comprises a body of flexible compressible foam material having a predetermined geometric shape and having a plurality of slits extending outwardly to peripheral portions of the predetermined geometric shape for receiving optical fiber slack portions therein.

12. An in-line splice closure according to claim 9 wherein said flexible substrate comprises a body of flexible compressible foam material comprising integrally formed outwardly extending fiber guide portions.

13. An in-line splice closure according to claim 1 wherein the first and second hybrid cables each further comprises a metallic shield;

and further comprising;

an elongate shield conductor extending within said outer housing and said organizer tube; and

first and second clamps for connecting opposing ends of said elongate shield conductor to respective ends of the metallic shields of the first and second hybrid cables.

14. An in-line splice closure according to claim 1 wherein said outer housing comprises a heat shrink material.

15. An in-line splice closure according to claim 1 further comprising at least one body of sealing material adjacent opposing first and second ends of said outer housing for sealing same to the respective first and second hybrid cables.

16. An in-line splice closure according to claim 15 further comprising a body of damming material positioned adjacent respective bodies of sealing material to retain the sealing material adjacent respective cable ends.

17. An in-line splice closure according to claim 1 further comprising an inner housing positioned underlying said outer housing.

18. An in-line splice closure according to claim 17 wherein said inner housing comprises tapered end portions.

19. An in-line splice closure for first and second hybrid cables each of a type including at least one optical fiber, a metallic shield, and at least one signal conductor, the in-line splice closure comprising:

an outer housing having opposing first and second ends for receiving respective ends of the first and second hybrid cables;

an elongate shield conductor for connecting respective ends of the metallic shields of the first and second hybrid cables;

an organizer tube extending within said outer housing;

at least one electrical connector within said organizer tube for connecting signal conductors of the first and second hybrid cables;

at least one optical splice for connecting optical fibers of the first and second hybrid cables; and

a flexible substrate wrapped around an outer surface of said organizer tube for supporting the at least one optical splice and adjacent optical fiber slack portions.

20. An in-line splice closure according to claim 19 wherein the optical fibers have a minimum bend radius;

and wherein said organizer tubs has a predetermined diameter and flexible substrate supports the optical fiber slack portions so as not to exceed the minimum bend radius.

21. An in-line splice closure according to claim 19 wherein the first and second hybrid cables each further comprises a buffer tube surrounding the at least one optical fiber;

and wherein said organizer tube has a longitudinally extending groove in an outer surface portion for receiving the buffer tubes.

22. An in-line splice closure according to claim 19 wherein said organizer tube comprises a rigid material.

23. An in-line splice closure according to claim 19 wherein said organizer tube comprises a compressible foam material.

24. An in-line splice closure according to claim 19 further comprising at least one flexible sheet covering said flexible substrate.

25. An in-line splice closure according to claim 19 wherein said flexible substrate comprises a body of flexible compressible foam material having a predetermined geometric shape and having a plurality of slits extending outwardly to peripheral portions of the predetermined geometric shape for receiving optical fiber slack portions therein.

26. An in-line splice closure according to claim 19 wherein said flexible substrate comprises a body of flexible compressible foam material comprising integrally formed outwardly extending fiber guide portions.

27. An in-line splice closure according to claim 19 wherein said outer housing comprises a heat shrink material.

28. An in-line splice closure according to claim 19 further comprising an inner housing positioned underlying said outer housing.

29. An in-line splice closure for first and second cables each of a type including at least one optical fiber, the in-line splice closure comprising:

an outer housing having opposing first and second ends for receiving respective ends of the first and second cables;

an organizer tube extending within said outer housing; and

a body of flexible compressible material positioned to extend around outer surface portions of said organizer tube and having a predetermined geometric shape and having a plurality of slits extending outwardly to peripheral portions of the predetermined geometric shape for receiving optical fiber slack portions therein.

30. An in-line splice closure according to claim 29 wherein the optical fibers have a minimum bend radius;

and wherein said organizer tube has a predetermined diameter and said body of flexible compressible material supports the optical fiber slack portions so as not to exceed the minimum bend radius.

31. An in-line splice closure according to claim 29 wherein said predetermined geometric shape is a disk shape so that said flexible substrate defines a disk-shaped body of compressible material having a plurality of radially outwardly extending slits therein.

32. An in-line splice closure according to claim 29 wherein said predetermined geometric shape is a generally oval shape.

33. An in-line splice closure according to claim 29 further comprising at least one flexible sheet covering said body of flexible compressible material.

34. An in-line splice closure according to claim 29 wherein the first and second cables each further comprises a buffer tube surrounding the at least one optical fiber;

and wherein said organizer tube has a longitudinally extending groove in an outer surface portion for receiving the buffer tubes.

35. An in-line splice closure according to claim 29 wherein said organizer tube comprises a rigid material.

36. An in-line splice closure according to claim 29 wherein said organizer tube comprises a compressible foam material.

37. An in-line splice closure according to claim 29 wherein said organizer tube comprises a longitudinally extending slit therein to facilitate opening and positioning of said organizer tube.

38. An in-line splice closure according to claim 29 wherein the first and second cables each further comprises a metallic shield;

and further comprising;

an elongate shield conductor extending within said outer housing and said organizer tube; and

first and second clamps for connecting opposing ends of said elongate shield conductor to respective ends of the metallic shields of the first and second cables.

39. An in-line splice closure according to claim 29 wherein said outer housing comprises a heat shrink material.

40. An in-line splice closure according to claim 29 further comprising an inner housing positioned underlying said outer housing.

41. A method for making an in-line splice for first and second hybrid cables each of a type including at least one optical fiber and at least one signal conductor, the method comprising the steps of:

connecting at least one electrical connector between respective signal conductors of the first and second hybrid cables;

positioning an organizer tube extending between first and second ends of the first and second hybrid cables and surrounding the at least one electrical connector;

forming at least one optical splice for connecting optical fibers of the first and second hybrid cables; and

supporting the at least one optical splice and adjacent optical fiber slack portions on a support member and wrapping the support member around an outer surface of the organizer tube.

42. A method according to claim 41 further comprising the step of positioning and securing an outer housing having opposing first and second ends to receive respective ends of the first and second hybrid cables.

43. A method according to claim 41 wherein the outer housing comprises a heat shrink material;

and wherein the step of securing comprises heating the heat shrink material.

44. A method according to claim 43 further comprising the step of positioning at least one body of sealing material adjacent opposing first and second ends of the outer housing;

and wherein the step of heating comprises heating to melt and flow the bodies of sealing material to seal the outer housing to the respective first and second hybrid cables.

45. A method according to claim 41 wherein the first and second hybrid cables each further comprises a buffer tube surrounding the at least one optical fiber;

and further comprising the step of positioning the buffer tubes in a longitudinally extending groove in an outer surface portion of the organizer tube.

46. A method according to claim 41 wherein the step of supporting comprises covering the support member with at least one flexible sheet.

47. A method according to claim 41 wherein the support member comprises a body of flexible compressible material having a predetermined geometric shape and having a plurality of slits extending outwardly to peripheral portions of the predetermined geometric shape;

and further comprising the step of positioning the optical fiber slack portions in the plurality of slits.

48. A method according to claim 41 wherein the support member comprises a body of flexible compressible foam material including integrally formed outwardly extending fiber guide portions;

and further comprising the step of positioning the optical fiber slack portions in the guide portions.

49. A method according to claim 41 wherein the first and second hybrid cables each further comprises a metallic shield;

and further comprising the step of connecting an elongate shield conductor between respective ends of the metallic shields of the first and second hybrid cables.

50. A method according to claim 41 further the step of positioning an inner housing underlying the outer housing.