Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS1883269 A
Publication typeGrant
Publication dateOct 18, 1932
Filing dateSep 12, 1928
Priority dateSep 12, 1928
Publication numberUS 1883269 A, US 1883269A, US-A-1883269, US1883269 A, US1883269A
InventorsHenry Yonkers Edward
Original AssigneeWestern Electric Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Electrical conductor
US 1883269 A
Images(1)
Previous page
Next page
Description  (OCR text may contain errors)

Oct. 18, 1932. E. H. Yo NKERs ELECTRICAL CONDUCTOR I Filed Sept. 12. 1928 m a m Patented Oct. 18, 1932 UNITED "STATES PATENT OFFICE EDWARD HENRY YONKERS, 0F W'ILMETTE, ILLINOIS, .ASSIGNOR TO WESTERN ELECTRIC COMPANY, INCORPORATED, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK ELECTRICAL CONDUCTOR Application filed September 12, 1928. Serial No. 305,339.

This invention relates to electrical con- -ductors,-and more particularly to insulated conductors such as are used in the telephone industry. I j

An object of the invention is the promsionof an insulated conductor which shall possess to a high degree the electrical quallties necessary in electrical conductors.

- A further object of the invention is to provide an improved core for'cables used for electrical transmission, which shall have improved capacitance and power factor characteristics and high resistance to the effects of moisture.

The invention contemplates the association of a plurality of conducting elements with a strip of solid insulating material, a

' continuous spiral twist being imparted to the conducting elements and the insulating strip. The resulting unit, consisting preferably of two conducting elements and an insulating strip, constitutes a multiple conductor which performs the function of the usual single conductor, and may be placed adjacent similar units without danger of a short-circuit between itand the conducting elements of the adjacent units, since the conducting elements of each unit are insulated from the conducting elements of the other units by being mechanically separated therefrom, the insulating strips holding the units apart a sufficient distance to allow air to pass beween them and form an effective insulation and materially reduce the capacitance between such conductors.

The invention will be more fully understood by reference to the following description taken in conjunction with the accompanying drawing, in which,

Fig. 1 shows in elevation a unit consisting of two conducting elements and an insulating strip arranged in accordance with the inven- Fig. 2 is an enlarged sectional view taken on the line 2-2 of Fig. 1, g

Fig. 3'is an enlarged sectional view similar to Fig. 2, but showing a modified unit,

Fig. 4 is an enlarged sectional view showing four units positioned contiguous to each other, as in a telephone cable,

Fig. 5 is an enlarged sectional view showing twg units of a modified form of conductor, an

Fig. 6 is an elevation of a cable formed in accordance with the invention.

Referring to the drawing in which similar reference characters represent similar parts in the several views, the unit shown in Fig. 1 is designated generally at 10, and consists of electrical conducting elements 11 and 12 with an insulating strip or separator 13 interposed will vary with the electrical and mechanical properties desired, the width and thickness of the separator, and with other factors, but should in general be sufiiciently low to insure against crushing under radial pressure;

The conducting units may, after assembly,

be given a water-proofcoating of hard wax,

resin, or any similar adhesive, non-hydro.- scopic substance, as illustrated at 16in Fig. 3. Such coating may be applied in any suitable therebetween, the conducting elements and manner, as by passing the unit into'contact with a body of the coating material in molten form. The coating is not essential to the production of a satisfactory insulated conductor, for ordinary purposes, but is desirable where high humidity conditions are expected, as it forms a surface protection against humidity effects which makes the unit practically waterproof. The two conducting elements of a unit function as a single conductor; for example, in telephone cables, the above described unit takes the place of the single wire commonly used as a unit conductor, and the conducting elements of the unit may therefore each be of one-half of the cross-sectional area of the single wire commonly used. Two units, when twisted together, may be used in place of the pair which ordinarily constitutes the simple circuit in telephone practice. As seen in Fig. 4, the conducting elements of the adjacent units are separated by a distance slightly less than one-half the width of the separator 13. The arrangement shown in Fig. 4 may be made more compact by using flat conductors such as are indicated at 14 and 15 of Fig. 5. The conductors in such case may consist of flattened wire laid flat against the separator 13. The resulting reduction in the lateral dimension of the conductors considerably reduces the bulk of a cable made up of such Where two or more units are twisted together as in Figs. 4 and 5, the direction of the lay or twist of-theunits about each other should be the same as that of the spiral separating strips, in order to get the maximum mechanical efiectiveness of this type of insulation and the least danger of short-circuiting between units. A plurality of units may be twisted together to form a core, which. may then be formed into a cable. Such a cable is shown by way of example in Fig. 6, wherein, the core is shown provided with a covering 17 of paper or other insulating or protective material, and'encased in a sheath or armor 18.

Insulated conductors formed according to the present invention produce a cable having a very low capacitance per mile between pairs ofconductors. This is due to the fact that in a cable formed in accordance with the present invention a greater proportion of air is included as a part ofthe insulatingmedium. The invention also produces an insulated conductor having extremely low power losses, as is shown by the fact that under dry conditions the power losses in a conductor provided with hard rubber spiral insulation are exceptionally low.

Another advantage of the construction set forth above lies in the fact that the units, even without the coating above described, are practically humidity proof, since their electrical properties'are almost unaffected by the presence of moisture. Thus, a No. 22 copper wire having the spiral insulation oi. hard rubber formed in accordance with this invention, and not coated with wax or other coating substance, when exposed for 30 hours to an atmosphere of 87% relative humidity and a temperature of20 centigrade had its capacitance raised by but 1.4% when tested at 1,000 cycles per second, and its conductance was increased by but 91% under the same conditions. The article made in accordance with the present invention, therefore, may be said to eliminate the difliculties arising from the eflects of humidity on stranded conductors.

While the invention has been described with particular reference to the insulation of copper conducting wires in telephone cables, it will be evident that it is applicable wherever it is desired to keep a plurality of substantially parallel ing with each other, and that it may therefore be used in power v lines as well as for telephonic transmission. Where the conducting units above described are used for high tension power transmission, the size of the conducting elements and separators will ordinarily be larger, and it may be'found desirable in certain circumstances to replace the air in the cable with oil or other fluid insulating material to thereby increase the dielectric strength of the insulation. This may be done by providing a sheath about the cable and introducing the insulating material.

into the cable by con tinuous or periodic pumping, the interstices between the spiral separators forming a continuous path through which the insulating material may flow. e

The article formed in accordance with this invention is sufficiently flexible to permit its being wound on spools, and may be twisted into pairs and formed into cables in the same manner as ordinary wire.

Various additional modifications of the invention will suggest themselves to those skilled in the art, and such modifications as fall within the spirit of the invention are intended to be covered by the appended claims.

What is claimed is:

1. A telephone cable comprising a plurality of pairs of conducting elements, and rigid insulated members disposed between each pair of conducting elements and engaging the conducting elements of other pairs for holding the pairs in spaced relation to each other.

2. An electrical conducting'unit comprisstrands from contacting a pair of conducting elements, a strip of thin, flat, rigid insulating material positioned therebetween, and a thin adherent coating of waterproofing substance on the conductors and strip securing the conductors on the strip.

3. An electrical conducting unit comprising pairs of conducting elements with strips of hard insulating material positioned between the pairs of conducting elements to ducting elements and engaging conducting said conducting elements.

' ments and separator elements of other pairs for holding the pairs in spaced relation to'each other, and a liquid insulating material filling the interstices be= tween the conductors.

5. A telephone cable comprising a plural ity of pairs of conducting elements, insulating members disposed between each pair or conducting elements and engaging the conducting elements of other pairs for holding the pairs in spaced relation to each other and a non-absorbent material disposed upon 6. An electrical conducting comprising a pair of conducting elements serving as a single conductor,-and a separator composed of a strip of hard rubber between said elements and projectin therefrom, said eleieing twisted together to form a cable strand.

7. An electrical conducting unit compris-= ing a pair of conducting elements serving as a single conductor, and a separator composed of a strip'of cellulose acetate between said elements and projecting therefrom, said elements and separator being twisted together to form a cable strand.

In witness. whereof, I hereunto subscribe my name this 27th day of August A. 1)., 1928.,

EDWARD HENRY YONKERS.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2440668 *Aug 18, 1943Apr 27, 1948Budd CoCable construction
US2690583 *May 3, 1950Oct 5, 1954Slack Stephen LDust mop
US5132488 *Feb 21, 1991Jul 21, 1992Northern Telecom LimitedElectrical telecommunications cable
US6091025 *Jul 29, 1998Jul 18, 2000Khamsin Technologies, LlcElectrically optimized hybird "last mile" telecommunications cable system
US6162992 *Mar 23, 1999Dec 19, 2000Cable Design Technologies, Inc.Shifted-plane core geometry cable
US6239379Nov 5, 1999May 29, 2001Khamsin Technologies LlcElectrically optimized hybrid “last mile” telecommunications cable system
US6241920Nov 5, 1999Jun 5, 2001Khamsin Technologies, LlcElectrically optimized hybrid “last mile” telecommunications cable system
US6248954Feb 25, 1999Jun 19, 2001Cable Design Technologies, Inc.Multi-pair data cable with configurable core filling and pair separation
US6303867Aug 29, 2000Oct 16, 2001Cable Design Technologies, Inc.Shifted-plane core geometry cable
US6506976Sep 14, 1999Jan 14, 2003Avaya Technology Corp.Electrical cable apparatus and method for making
US6570095May 11, 2001May 27, 2003Cable Design Technologies, Inc.Multi-pair data cable with configurable core filling and pair separation
US6684030Aug 25, 1999Jan 27, 2004Khamsin Technologies, LlcSuper-ring architecture and method to support high bandwidth digital “last mile” telecommunications systems for unlimited video addressability in hub/star local loop architectures
US6812408May 28, 2003Nov 2, 2004Cable Design Technologies, Inc.Multi-pair data cable with configurable core filling and pair separation
US6998537Jan 3, 2003Feb 14, 2006Belden Cdt Networking, Inc.Multi-pair data cable with configurable core filling and pair separation
US7015397May 27, 2003Mar 21, 2006Belden Cdt Networking, Inc.Multi-pair communication cable using different twist lay lengths and pair proximity control
US7030321Jul 28, 2004Apr 18, 2006Belden Cdt Networking, Inc.Skew adjusted data cable
US7064277Dec 16, 2004Jun 20, 2006General Cable Technology CorporationReduced alien crosstalk electrical cable
US7109424Jul 9, 2004Sep 19, 2006Panduit Corp.Alien crosstalk suppression with enhanced patch cord
US7157644Dec 16, 2004Jan 2, 2007General Cable Technology CorporationReduced alien crosstalk electrical cable with filler element
US7179999Feb 13, 2006Feb 20, 2007Belden Technologies, Inc.Multi-pair data cable with configurable core filling and pair separation
US7208683Jan 28, 2005Apr 24, 2007Belden Technologies, Inc.Data cable for mechanically dynamic environments
US7214883 *Apr 25, 2006May 8, 2007Leyendecker Robert RElectrical signal cable
US7238885Mar 24, 2005Jul 3, 2007Panduit Corp.Reduced alien crosstalk electrical cable with filler element
US7244893Jun 7, 2004Jul 17, 2007Belden Technologies, Inc.Cable including non-flammable micro-particles
US7271343Feb 1, 2006Sep 18, 2007Belden Technologies, Inc.Skew adjusted data cable
US7317163Oct 12, 2005Jan 8, 2008General Cable Technology Corp.Reduced alien crosstalk electrical cable with filler element
US7317164Nov 20, 2006Jan 8, 2008General Cable Technology Corp.Reduced alien crosstalk electrical cable with filler element
US7612289Dec 19, 2007Nov 3, 2009General Cable Technology CorporationReduced alien crosstalk electrical cable with filler element
US7728228Aug 31, 2006Jun 1, 2010Panduit Corp.Alien crosstalk suppression with enhanced patchcord
US7922515Apr 24, 2009Apr 12, 2011Commscope, Inc Of North CarolinaDevices for connecting conductors of twisted pair cable to insulation displacement contacts
US7999184Mar 19, 2009Aug 16, 2011Commscope, Inc. Of North CarolinaSeparator tape for twisted pair in LAN cable
US8182281Apr 19, 2010May 22, 2012Commscope, Inc. Of North CarolinaDevices for connecting conductors of twisted pair cable to insulation displacement contacts
US8319104Feb 12, 2010Nov 27, 2012General Cable Technologies CorporationSeparator for communication cable with shaped ends
EP1085530A2 *Sep 4, 2000Mar 21, 2001Lucent Technologies Inc.Electrical cable apparatus and method for making
WO2006132716A2 *Apr 25, 2006Dec 14, 2006Robert R LeyendeckerElectrical signal cable
WO2010123957A2 *Apr 21, 2010Oct 28, 2010Commscope Inc. Of North CarolinaDevices for connecting conductors of twisted pair cable to insulation displacement contacts
Classifications
U.S. Classification174/27, 174/114.00R, 174/113.00C, 174/120.00C, 174/117.0AS
International ClassificationH01B11/00
Cooperative ClassificationH01B11/002
European ClassificationH01B11/00B