Web for separating conductors in a communication cable

• US 8,030,571 B2
• Filed: 06/30/2010
• Issued: 10/04/2011
• Est. Priority Date: 03/06/2006
• Status: Active Grant

• Current Assignee: Belden Inc.
• Original Assignee: Belden Inc.
• Inventors: Vexler, Gavriel, Gareis, Galen Mark
• Primary Examiner(s): MAYO III, WILLIAM H
• Application Number:
  US12/827,762
• Publication Number:
  US 20100263907A1
• Time in Patent Office: 461 Days
• Field of Search: 174/110.R, 174/113.R, 174/113.AS, 174/113.C, 174/115, 174/116, 174/36
• US Class Current: 174/110.00R
• CPC Class Codes: H01B 11/005 Quad constructions
• CPC Class Codes: H01B 11/04 with pairs or quads mutually positioned to reduce cross-talk
• CPC Class Codes: H01B 11/06 with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
• CPC Class Codes: H01B 7/189 Radial force absorbing layers providing a cushioning effect H01B7/185 takes precedence

Abstract

A telecommunications cable and separator spline. In one example the cable includes a cable jacket defining an elongate cable core, a conductor assembly including four twisted pairs of conductors disposed along the core and a plurality of parallel elongate localized and like distensions in an inner surface of the cable jacket. The distensions are substantially evenly spaced about an inner surface of the cable jacket. In one example, the distensions are the result of a series of filler elements placed between the cable jacket and the cable core and which wind helicoidally along and about the cable core. The separator spline includes first and second elongate dividing strips having a substantially H shaped cross section and arranged side by side, and twists helicoidally along its length. In one example the separator spline and the insulation surrounding the twisted pairs of conductors is manufactured form a material having the same dielectric constant.

Claims

1. A telecommunications cable comprising:

four twisted pairs of insulated conductors;

a separator configured to provide four quadrants in the cable within which the four twisted pairs of insulated conductors are individually disposed; and

a cable jacket surrounding the four twisted pairs of insulated conductors and the separator along the length of the telecommunications cable;

wherein the separator comprises a central portion, first and second side portions positioned parallel to the central portion on either side of the central portion, and first and second cross portions positioned on opposite sides of the central portion and substantially perpendicular to the central portion;

wherein the first cross portion joins the first side portion to the central portion, and the second cross portion joins the second side portion to the central portion; and

wherein the first and second cross portions are offset relative to one another along a height of the central portion.

2. The telecommunications cable as claimed in claim 1, wherein a combination of the central portion, the first cross portion and the first side portion is approximately H shaped in cross-section;

and

wherein a combination of the central portion, the second cross portion and the second side portion is approximately H shaped in cross-section.

3. The telecommunications cable as claimed in claim 1, wherein the first cross portion is attached approximately mid-way along a height of the first side portion.

4. The telecommunications cable as claimed in claim 1, wherein the separator and the four twisted pairs of insulated conductors are helically stranded together along the length of the telecommunications cable.

5. The telecommunications cable as claimed in claim 1, wherein the separator is a unitary structure.

6. The telecommunications cable as claimed in claim 1, wherein the first and second side portions are positioned to prevent the four twisted pairs from contacting the cable jacket.

7. The telecommunications cable as claimed in claim 1, wherein each twisted pair comprises two conductors each surrounded by an insulation and helicoidally twisted together;

and

wherein the separator comprises a material having a dielectric constant that is substantially the same as a dielectric constant of the insulation of the twisted pairs.

8. The telecommunications cable as claimed in claim 1, wherein the four twisted pairs of conductors include a first twisted pair having a first twist lay length, a second twisted pair having a second twist lay length, a third twisted pair having a third twist lay length, and a fourth twisted pair having a fourth twist lay length;

wherein the first and second twist lay lengths are shorter than the third and fourth twist lay lengths; and

wherein an arrangement of the four twisted pairs of conductors within the telecommunications cable and the offset positioning of the first and second cross portions are such that the third and fourth twisted pairs are located closer to a geometric center of the cable than are the first and second twisted pairs of conductors.

9. The telecommunications cable as claimed in claim 1, further comprising four filler elements, each filler element being attached to a respective end of the first and second side portions and positioned between the respective side portion and the cable jacket.

10. The telecommunications cable as claimed in claim 1, wherein the cable jacket is fluted to include a plurality of raised distensions on an inner surface of the cable jacket.

11. A telecommunications cable comprising:

four twisted pairs of insulated conductors;

a separator comprising a first h-shaped portion and a second h-shaped portion, the separator configured to provide four quadrants in the cable within which the four twisted pairs of insulated conductors are individually disposed; and

a cable jacket surrounding the four twisted pairs of insulated conductors and the separator along the length of the telecommunications cable;

wherein the first and second h-shaped portions touch along a heel thereof.

12. The telecommunications cable as claimed in claim 11, wherein the first and second h-shaped portions are co-joined at the heel.

13. The telecommunications cable as claimed in claim 12, wherein the first and second h-shaped portions have substantially the same dimensions.

14. The telecommunications cable as claimed in claim 12, wherein the separator and the four twisted pairs of insulated conductors are helically stranded together along the length of the telecommunications cable.

15. The telecommunications cable as claimed in claim 12, wherein the first and second h-shaped portions are positioned to prevent the four twisted pairs from contacting the cable jacket.

16. The telecommunications cable as claimed in claim 12, wherein each twisted pair comprises two conductors each surrounded by an insulation and helicoidally twisted together;

and

wherein the separator comprises a material having a dielectric constant that is substantially the same as a dielectric constant of the insulation of the twisted pairs.

17. The telecommunications cable as claimed in claim 12, wherein the four twisted pairs of conductors include a first twisted pair having a first twist lay length, a second twisted pair having a second twist lay length, a third twisted pair having a third twist lay length, and a fourth twisted pair having a fourth twist lay length;

wherein the first and second twist lay lengths are shorter than the third and fourth twist lay lengths; and

wherein an arrangement of the four twisted pairs of conductors within the telecommunications cable and an offset positioning of the first and second h-shaped portions are such that the third and fourth twisted pairs are located closer to a geometric center of the cable than are the first and second twisted pairs of conductors.

18. The telecommunications cable as claimed in claim 12, wherein the first and second h-shaped portions are positioned within the cable as reverse minor images of one another.