OPTICAL CABLE SHIELD LAYER CONNECTION

• US 20070269169A1
• Filed: 05/17/2006
• Published: 11/22/2007
• Est. Priority Date: 05/17/2006
• Status: Active Grant

• Current Assignee: SubCom, LLC
• Original Assignee: Tyco Telecommunications Us Incorporated (Johnson Controls International plc)
• Inventors: Jackson, James, Kordahi, Maurice, Mendez, Jeremiah, Stix, Robert
• Granted Patent: US 7,373,054 B2
• Time in Patent Office: Days
• US Class Current: 385/100
• CPC Class Codes: G02B 6/3816 for use under water, high pressure connectors provisionally see G02B6/4428
• CPC Class Codes: G02B 6/3817 containing optical and electrical conductors cables including electrical and optical conductors H01B11/22; G02B6/3816 takes precedence
• CPC Class Codes: G02B 6/4416 Heterogeneous cables
• CPC Class Codes: G02B 6/4475 with provision for lateral branching G02B6/4431 takes precedence
• CPC Class Codes: H01R 13/523 for use under water
• CPC Class Codes: H01R 13/65914 Connection of shield to additional grounding conductors
• CPC Class Codes: H01R 4/48 utilising a spring, clip, or other resilient member H01R4/52 takes precedence
• CPC Class Codes: H01R 4/72 using a heat shrinking insulating sleeve
• CPC Class Codes: H01R 43/005 for making dustproof, splashproof, drip-proof, waterproof, or flameproof connection, coupling, or casing
• CPC Class Codes: H01R 9/0512 Connections to an additional grounding conductor

Abstract

An optical cable shield layer connection may include a wire electrically connected to a shield layer of an optical cable. The optical cable shield layer connection may also be sealed, for example, to prevent leak paths. The optical cable shield layer connection may be made when coupling the optical cable to a device or another cable, for example, using a universal joint such as the Millennia® Joint available from Tyco Telecommunications (US) Inc. The wire may provide a ground path from the shield layer or a continuity path from the shield layer to another optical cable.

Claims

1. A method comprising:

providing an optical cable with an exposed shield layer extending from an outer sheath and a wire including at least one electrical conductor;

securing a first electrical conductor portion of said at least one electrical conductor of said wire in contact with said exposed shield layer;

folding said wire;

securing a second electrical conductor portion of said at least one electrical conductor of said wire; and

sealing at least a portion of said shield layer and said at least one electrical conductor of said wire in a sealant.

2. The method of claim 1 wherein providing said optical cable comprises removing a portion of said outer sheath of said optical cable to expose said exposed shield layer and removing a portion of said exposed shield layer.

3. The method of claim 2 wherein providing said optical cable comprises cleaning said exposed shield layer.

4. The method of claim 1 further comprising securing said shield layer with a stress relief termination.

5. The method of claim 1 wherein securing said first electrical conductor portion comprises positioning said first electrical conductor portion against said shield layer and securing a spring clamp around said first electrical conductor portion to hold said first electrical conductor portion against said shield layer.

6. The method of claim 5 wherein securing said second electrical conductor portion comprises positioning said second electrical conductor portion against said spring clamp and securing said spring clamp around said second electrical conductor portion to hold said second electrical conductor portion between portions of said spring clamp.

7. The method of claim 6 further comprising wrapping a metallic tape around said spring clamp.

8. The method of claim 1 wherein sealing said portion of said shield layer and said at least one electrical conductor comprises applying at least a first portion of said sealant to an end portion of said shield layer before folding over said wire and then embedding said wire into said first portion of said sealant after folding over said wire.

9. The method of claim 8 wherein sealing said portion of said shield layer and said at least one electrical conductor comprises applying at least a second portion of said sealant over said at least one electrical conductor and an end portion of said outer sheath.

10. An optical cable shield layer connection system comprising:

an optical cable comprising a cable core portion, an outer sheath, and a shield layer located between said outer sheath and said cable core portion, said shield layer including an exposed portion extending from said outer sheath;

a wire including at least one electrical conductor, said electrical conductor including at least a first electrical conductor portion secured in contact with said exposed portion of said shield layer and a second electrical conductor portion folded relative to said first electrical conductor portion;

at least one clamp securing said first and second electrical conductor portions to said shield layer; and

a sealant encapsulating said electrical conductor and said exposed portion of said shield layer.

11. The cable connection system of claim 10 wherein said shield layer is a screen layer.

12. The cable connection system of claim 10 wherein said cable core portion includes a plurality of optical fibers, a tube holding said optical fibers, at least one layer of strength members around said tube, a conductive sheath around said strength members, and an insulation layer around said conductive sheath.

13. The cable connection system of claim 10 wherein said outer sheath is a polymer sheath.

14. The cable connection system of claim 10 wherein said at least one electrical conductor includes a plurality of electrical conductor strands.

15. The cable connection system of claim 10 wherein said clamp includes a spring clamp secured around said first and second electrical conductor portions and said shield layer, and wherein said first electrical conductor portion is secured between said shield layer and a first spring clamp portion of said spring clamp and said second electrical conductor portion is secured between said first spring clamp portion and a second spring clamp portion of said spring clamp.

16. The cable connection system of claim 15 wherein said clamp includes a metallic tape around said spring clamp.

17. The cable connection system of claim 10 wherein said sealant includes a thermoplastic sealant.

18. The cable connection system of claim 10 wherein said sealant includes a first portion of sealant applied to an end portion of said shield layer, a second portion of sealant applied to said shield layer between said clamp and an end of said outer sheath, and a third portion of sealant applied over said clamp, said electrical conductor, and an end portion of said sheath.

19. The cable connection system of claim 10 further comprising a stress relief termination at an end of said shield layer.

20. The cable connection system of claim 10 wherein said sealant includes a heat shrink member.