Composite cable

• US 5,917,977 A
• Filed: 09/16/1997
• Issued: 06/29/1999
• Est. Priority Date: 09/16/1997
• Status: Expired due to Term

• Current Assignee: Corning Optical Communications LLC (Corning Incorporated)
• Original Assignee: Siecor Corporation (Corning Incorporated)
• Inventors: Barrett, Louis A.
• Primary Examiner(s): Palmer, Phan T. H.
• Application Number:
  US08/931,634
• Time in Patent Office: 651 Days
• Field of Search: 385/100-114, 385/101
• US Class Current: 385/101
• CPC Class Codes: G02B 6/4416 Heterogeneous cables
• CPC Class Codes: G02B 6/4434 Central member to take up tensile loads
• CPC Class Codes: G02B 6/4436 Heat resistant
• CPC Class Codes: G02B 6/44384 the means comprising water blocking or hydrophobic materials G02B6/4439, G02B6/4479 take precedence
• CPC Class Codes: H01B 11/22 Cables including at least one electrical conductor together with optical fibres

Abstract

A composite cable (10) includes a core section (12), a tensile strength section (20), a conductor and water blocking section (30), an armor tape (50), and an outer jacket (60). Core section (12) includes at least one fiber optic conductor (14), and conductor and water blocking section (30) includes twisted pair conductors (32) and water blocking members (36,37). Tensile strength section (20) includes strength members (22). Composite cable (10) combines the high bit-rate capacity of fiber optic conductor (14) with the electrical signal/power carrying capacity of electrical conductors (32) and meets water blocking and tensile strength requirements.

Claims

1. A composite cable, comprising:

a fiber optic core section, said core section including at least one fiber optic conductor;

a strength section, said strength section having strength members generally surrounding said core section for imparting strength and anti-buckling to said composite cable;

a conductor and water blocking section having a set of conductors, interstices being adjacent said conductors, a water blocking member in at least some of said interstices, and a separate water blocking member adjacent to said set of conductors.

2. The composite cable of claim 1, wherein at least two of said set of conductors are electrical conductors.

3. The composite cable of claim 2, wherein said electrical conductors comprise a twisted pair of conductors.

4. The composite cable of claim 1, wherein said core section comprises a buffer tube.

5. The composite cable of claim 4, wherein said strength section comprises fibrous members which generally surround said buffer tube.

6. The composite cable of claim 1, wherein said conductor and water blocking section surrounds said strength section.

7. The composite cable of claim 1, wherein said core section comprises a tight buffered fiber optic cable for indoor use.

8. A composite cable, comprising:

a fiber optic core section, said core section including at least one fiber optic conductor;

a strength section, said strength section generally surrounding said core section for imparting tensile strength to said composite cable;

a conductor and water blocking section, said conductor and water blocking section having a set of conductors and interstices adjacent said conductors, at least one of said conductors being generally disposed between first and second water blocking members.

9. The composite cable of claim 8, wherein one of said water blocking members is stranded between said at least one conductor of said set of conductors and another conductor of said set of conductors.

10. The composite cable of claim 9, wherein said set of conductors comprises a helical or SZ lay about said strength section.

11. The composite cable of claim 10, wherein said strength section lay is generally opposite to said lay of said conductors.

12. The composite cable of claim 11, wherein said water blocking member comprises a helical or SZ lay.

13. The composite cable of claim 8, wherein said set of conductors is arranged between said strength section and said one of said water blocking members.

14. The composite cable of claim 8, wherein said strength section comprises a helical or SZ lay about said core section.

15. A composite cable, comprising:

a fiber optic core section, said fiber optic core section including at least one fiber optic conductor, fiber optic core section being protected by a strength section;

a jacket, said jacket surrounds said core section;

an annulus defined between said jacket and said core section, said annulus comprises a set of conductors with interstices between at least some of the conductors;

said annulus further comprises first and second water blocking members, said first water blocking member being disposed in one of said interstices, said second water blocking member being adjacent said set of conductors.

16. The composite cable of claim 15, wherein said annulus comprises a third water blocking member, said third water blocking member being adjacent said fiber optic core section.

17. A composite cable, comprising:

an optical core section, said optical core section including at least one optical conductor;

a jacket, said jacket surrounds said core section; and

an annulus, said annulus being defined between said jacket and said core section, said annulus comprising a set of conductors with interstices between at least some of the conductors;

a water blocking member, said water blocking member being disposed in one of said interstices adjacent said set of conductors.

18. The composite cable of claim 17, said optical core section comprising a tube surrounding said optical conductor.

19. The composite cable of claim 18, said tube comprising a water blocking substance.

20. The composite cable of claim 19, said water blocking substance comprising a dry water blocking substance.

21. The composite cable of claim 19, said water blocking substance comprising a silicone or petroleum based material.

22. The composite cable of claim 17, said composite cable comprising a second water blocking member, said second water blocking member surrounding said optical core section.

23. The composite cable of claim 22, said second water blocking member comprising a water blocking tape adjacent said jacket.

24. The composite cable of claim 17, some of said conductors comprising electrical conductors.

25. The composite cable of claim 24, some of said electrical conductors comprising a twisted pair.

26. The composite cable of claim 17, said composite cable comprising an armor tape.

27. The composite cable of claim 17, said water blocking member comprising a water blocking yarn.

28. The composite cable of claim 17, said optical core section comprising a tight buffered optical fiber.

29. The composite cable of claim 17, said annulus comprising an optical conductor.