Electrical cable comprising geometrically optimized conductors

• US 7,462,782 B2
• Filed: 05/25/2006
• Issued: 12/09/2008
• Est. Priority Date: 06/19/2003
• Status: Expired due to Term

• Current Assignee: Belden Technologies, LLC (Belden Inc.)
• Original Assignee: Belden Technologies, LLC (Belden Inc.)
• Inventors: Clark, William T.
• Primary Examiner(s): Nguyen; Chau N
• Application Number:
  US11/440,553
• Publication Number:
  US 20060207786A1
• Time in Patent Office: 929 Days
• Field of Search: 174/110.R, 174/113.R, 174/115, 174/27
• US Class Current: 174/110.00R
• CPC Class Codes: H01B 11/002 Pair constructions
• CPC Class Codes: H01B 7/184 Sheaths comprising grooves, ribs or other projections
• CPC Class Codes: H01B 7/185 Sheaths comprising internal cavities or channels
• CPC Class Codes: H01B 7/189 Radial force absorbing layers providing a cushioning effect H01B7/185 takes precedence

Abstract

A number of examples of insulated conductors having geometrically optimized shapes and form factors, that may be used in twisted-pair cables and other types of communication cable to enhance the performance of, and/or reduce the cost of manufacturing such cables.

Claims

1. A twisted pair of insulated conductors constructed for data communications comprising:

a first insulated conductor comprising a first conductive core and a first discrete insulating layer surrounding the first conductive core along its length; and

a second insulated conductor comprising a second conductive core and a second discrete insulating layer surrounding the second conductive core along its length;

wherein the first and second insulating layers have a substantially oval widthwise cross-section;

wherein the first and second insulated conductors are twisted together to form the twisted pair constructed for data communications;

wherein the first insulated conductor does not include an outer conductor coaxially surrounding the first discrete insulating layer;

wherein the second insulated conductor does not include an outer conductor coaxially surrounding the second discrete insulating layer; and

wherein the first and second conductive cores are substantially circular in cross-section.

2. The twisted pair of insulated conductors as claimed in claim 1, wherein the first and second insulated conductors are helically twisted together such that major axes of the first and second insulating layers periodically contact one another so as to provide a back-tensioning effect between the first and second insulated conductors after twist.

3. The twisted pair of insulated conductors as claimed in claim 1, wherein the first and second insulating layers comprise thicker portions and thinner portions, so as to provide the oval cross-section, and wherein each of the first and second insulating layers comprises two indentations in the thinner portions, the two indentations disposed substantially opposite one another.

4. The twisted pair of insulated conductors as claimed in claim 1, wherein each of the first and second insulating layers comprises a cavity extending toward, but not reaching, the first and second conductive cores, respectively.

5. The twisted pair of insulated conductors as claimed in claim 4, wherein each of the first and second insulating layers comprises thicker portions and thinner portions, thereby forming the oval widthwise cross-section;

and wherein the cavity is disposed in one of the thinner portions.

6. The twisted pair of insulated conductors as claimed in claim 1, wherein at least one of the first and second insulating layers comprises a polyolefin material.

7. The twisted pair of insulated conductors as claimed in claim 1, wherein each of the first and second insulating layers comprises thicker portions and thinner portions, so as to provide the oval cross-section;

and wherein the cavity is disposed in one of the thinner portions.

8. A data communications cable comprising:

a plurality of twisted pairs of insulated conductors constructed for data communications; and

a jacket surrounding the plurality of twisted pairs along a length of the cable;

wherein each twisted pair of the plurality of twisted pairs is the twisted pair as claimed in claim 1.