US1475139A - Telephone cable - Google Patents

Telephone cable Download PDF

Info

Publication number
US1475139A
US1475139A US36996920A US1475139A US 1475139 A US1475139 A US 1475139A US 36996920 A US36996920 A US 36996920A US 1475139 A US1475139 A US 1475139A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
pair
twists
pairs
elements
cores
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
Inventor
George C Pearson
Original Assignee
George C Pearson
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Grant date

Links

Images

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00Communication cables or conductors
    • H01B11/02Cables with twisted pairs or quads
    • H01B11/04Cables with twisted pairs or quads with pairs or quads mutually positioned to reduce cross-talk

Description

Nov. 20 1923.

G. c PEARSON TELEPHQNE CAB Filed March 5f), 1920 Patented Nov. 20, 1923. p t I UNITED IPA TENT OFFICE.

eiioaen o. PEAR-SUN, or Lonnon; ENGLAND.

TELEPHONE CABLE.

Application filed March so, 1920. Serial No. 369,969.

To all whom it may concern:

Be it known that 1, GEORGE CHARLES PnARsoN, a subject of the King of Great Britain,residing in London, England, have invented certain new and useful Improvements Relating to Telephone Cables, of which the following is a. specification.

The invention relates to telephone cables of the multiple twin type. in which two elements are twisted together to form a pair, and two pairs are twisted together to form two pair cores, thesetwo twisted together to'form a cable.

In these cables and particularly in those in which a-phantom circuit is superimposed on two side circuits, it is a mostimportant condition for satisfactory working, that working currents circulatingin one circuit shall not electrically disturb the working of any other circuit in the cable.

To ensure this condition being obtained, it is necessary that any electrical unbalancing between the side circuits, between the phantom and side circuits and between the side circuits and earth shall be reduced to a minimum. This is also necessary in the case in which there is a further superimposition of phantom circuit on phantom circuit. i

In order to obtain the minimum unbalancing it is necessary that the elements in any combination of pairs forming a circuit should not be in parallel dispositions, that r they should be as nearly as possible equal in length and uniformly distant from one another and in as nearly as possible correct relative positions to one another when the combinations of pairs are stranded together to form a cable.

According to a known method for reducing the disturbance, the elements forming a pair are twisted together with a variable twist, the pairs being transposed with reference to each other at certain intervals in the cable length; such transposition, however, is not practicable in the case of cables composed of quads, multiple twin or quadded cores, as the crossing of the quads or combinations of pairs would tend to increase the diameter of the cable at these points and as each layer is added there would be considerable crushing of the cores which would be detrimental.

In two pair cores comprising two pairs twisted together, the elements of which are twisted together, in known manner at a difpairs belng B of a pair in relation to the central axis ferent pitch or at different degrees at alter nate sections and so combined into a'cable that parallelism between the two wires or any .two different pairs is avoided elements of the two pairs must frequently cross in the same axial plane and the four elements will then he in a straight line, and a little later the elements of each pair .will lie side by side in planes at right angles to the for iner plane, the width of the two pair cores varying considerably throughout its length.

In laying these two pair cores together to form a cable, the elements at the wide portions are displaced from their correct posi tions by contact with the adjacent two pair cores and are subject to a much greater pressure than at other parts.

Fig. 1 of the accompanying drawings shows the positions of two conductors A and C at different angular Fig. 2 shows laid together at twists.

Fig. 3 shows a method of winding two phases of the lay. a two pair core as usually two difi'erent points of the pair cores according to the invention; and

Figs. 4- and 5 are sections of these cores showing positions occupied by the conductors according to the invention.

According to the invention the pitch of the twists in all adjacent parts of the pairs is different, but the total numberof twists is substantially the same in each pair, thereby ensuring the same length of conductors and the same electric resistance. For example there may be a series of 20 inch pitches succeeded by a series of 10 inch pitches, the center part of the shorter twists of one pair being opposite the center part 01. the longer twists of the other pair.

Also, the actual lengths of the twists in adjacent combinations of pairs are, preferably, different; for instance, in one combination a series of 20 inch pitches may be succeeded by a series of 10 inch pitches, and in an adjacent combination a series of 18 inch pitches maybe succeeded by a series of 12 inch pitches, the total number of twists being the same in each combination. 7

The arrangement is illustrated in Fig. 3, where the distances between 10 and 11, 11 and 12 represent the long twists and the distances between 12 and l3, l3 and 14, 14 and 15, 15 and 16 represent the short twists.

In the other pair of the two pair cores (shown separated in the diagram) the short twists, viz: between 10' and 11, 11' and 12, 12 and 13', 13' and 14: are opposite the long twists of the first pair and similarly the long twists between 14: and 15, 15 and 16 are opposite the short twists of the first pair.

Also, according to the invention, the two pairs are so relatively disposed that the four elements of the pairs cannot come into the same plane simultaneously at any part of the length of the cable. This condition is fulfilled under the arrangement described, in which the center portions of the shorter twists of one pair are opposite the center portions of the longer twists of the other pair, it the pairs are laid together so that the four conductors at any part of the length of the cable assume the positions shown in Fig. 5, viz: The tour conductors lie in two parallel planes; this disposition is obviously easily arranged at the commencement of the operation of laying the two pairs togther. Under these conditions the four elements cannot assume the positions shown in Fig. 2 and the resultant conformation of the two pair cores at their largest diameter is shown in Fig. 4.

In cables of this type it is obvious that the pairing and building up of the combinations of pairsmay be done in separate operations, but combinations consisting of two pairs twisted together forming two pair cores may be made in one operation. The latter method tends more to ensure the correct relative positions of the twists in the pairs throughout the whole length of the combinations.

Having thus described the nature of the said invention and the best means I know of carrying the same into practical effect, I claim In telephone cables for duplex and phantom circuit working, two pair cores comprising two pairs of elements twisted together in which the pairs for a manufactured length are formed with a series of long twists followed by a series of shorter twists, the eenter portion of the shorter twists in one pair being placed opposite the center portion of the longer twists of the other pair, the elements of the two pairs at these points being in parallel planes, the elements of one pair being always in a different plane from the elements of the other pair, and the relative positions of these planes being the same at corresponding cross sections of the complete twists throughout the length.

In testimony whereof I have signed my name to this specification.

GEORGE C. PEARSON.

US1475139A 1920-03-30 1920-03-30 Telephone cable Expired - Lifetime US1475139A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US1475139A US1475139A (en) 1920-03-30 1920-03-30 Telephone cable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US1475139A US1475139A (en) 1920-03-30 1920-03-30 Telephone cable

Publications (1)

Publication Number Publication Date
US1475139A true US1475139A (en) 1923-11-20

Family

ID=23457695

Family Applications (1)

Application Number Title Priority Date Filing Date
US1475139A Expired - Lifetime US1475139A (en) 1920-03-30 1920-03-30 Telephone cable

Country Status (1)

Country Link
US (1) US1475139A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3736366A (en) * 1972-04-27 1973-05-29 Bell Telephone Labor Inc Mass bonding of twisted pair cables
US4486619A (en) * 1983-05-12 1984-12-04 Minnesota Mining And Manufacturing Company Uniform twisted wire pair electrical ribbon cable
US20050092514A1 (en) * 2003-10-31 2005-05-05 Robert Kenny Cable utilizing varying lay length mechanisms to minimize alien crosstalk
US20050092515A1 (en) * 2003-10-31 2005-05-05 Robert Kenny Cable with offset filler
US20050165686A1 (en) * 2002-04-24 2005-07-28 Russel Zack System and method for two-way communication between media consumers and media providers
US6959533B2 (en) 2002-01-10 2005-11-01 International Business Machines Corporation Apparatus and method for producing twisted pair cables with reduced propagation delay and crosstalk
US7375284B2 (en) 2006-06-21 2008-05-20 Adc Telecommunications, Inc. Multi-pair cable with varying lay length
US20080134655A1 (en) * 2005-02-04 2008-06-12 Nexans Helically-wound electric cable
JP2013026139A (en) * 2011-07-25 2013-02-04 Auto Network Gijutsu Kenkyusho:Kk Twisted pair wire, harness and manufacturing method of twisted pair wire

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3736366A (en) * 1972-04-27 1973-05-29 Bell Telephone Labor Inc Mass bonding of twisted pair cables
US4486619A (en) * 1983-05-12 1984-12-04 Minnesota Mining And Manufacturing Company Uniform twisted wire pair electrical ribbon cable
US6959533B2 (en) 2002-01-10 2005-11-01 International Business Machines Corporation Apparatus and method for producing twisted pair cables with reduced propagation delay and crosstalk
US20050165686A1 (en) * 2002-04-24 2005-07-28 Russel Zack System and method for two-way communication between media consumers and media providers
US7498518B2 (en) 2003-10-31 2009-03-03 Adc Telecommunications, Inc. Cable with offset filler
US20050167151A1 (en) * 2003-10-31 2005-08-04 Adc Incorporated Cable with offset filler
US20050205289A1 (en) * 2003-10-31 2005-09-22 Adc Incorporated Cable with offset filler
US20050092515A1 (en) * 2003-10-31 2005-05-05 Robert Kenny Cable with offset filler
US20050247479A1 (en) * 2003-10-31 2005-11-10 Adc Incorporated Cable with offset filler
US20050279528A1 (en) * 2003-10-31 2005-12-22 Adc Incorporated Cable utilizing varying lay length mechanisms to minimize alien crosstalk
US7115815B2 (en) 2003-10-31 2006-10-03 Adc Telecommunications, Inc. Cable utilizing varying lay length mechanisms to minimize alien crosstalk
US7214884B2 (en) 2003-10-31 2007-05-08 Adc Incorporated Cable with offset filler
US20070102189A1 (en) * 2003-10-31 2007-05-10 Robert Kenny Cable with offset filler
US20050092514A1 (en) * 2003-10-31 2005-05-05 Robert Kenny Cable utilizing varying lay length mechanisms to minimize alien crosstalk
US7220918B2 (en) 2003-10-31 2007-05-22 Adc Incorporated Cable with offset filler
US7329815B2 (en) 2003-10-31 2008-02-12 Adc Incorporated Cable with offset filler
US8375694B2 (en) 2003-10-31 2013-02-19 Adc Telecommunications, Inc. Cable with offset filler
US7875800B2 (en) 2003-10-31 2011-01-25 Adc Telecommunications, Inc. Cable with offset filler
US7220919B2 (en) 2003-10-31 2007-05-22 Adc Incorporated Cable with offset filler
US9142335B2 (en) 2003-10-31 2015-09-22 Tyco Electronics Services Gmbh Cable with offset filler
US7497070B2 (en) 2005-02-04 2009-03-03 Nexans Helically-wound electric cable
US20080134655A1 (en) * 2005-02-04 2008-06-12 Nexans Helically-wound electric cable
US8069644B2 (en) 2005-02-04 2011-12-06 Nexans Helically-wound electric cable
US20090126969A1 (en) * 2005-02-04 2009-05-21 Nexans Helically-wound electric cable
US7550676B2 (en) 2006-06-21 2009-06-23 Adc Telecommunications, Inc. Multi-pair cable with varying lay length
US7375284B2 (en) 2006-06-21 2008-05-20 Adc Telecommunications, Inc. Multi-pair cable with varying lay length
JP2013026139A (en) * 2011-07-25 2013-02-04 Auto Network Gijutsu Kenkyusho:Kk Twisted pair wire, harness and manufacturing method of twisted pair wire

Similar Documents

Publication Publication Date Title
US3324233A (en) Cable complex employing strand twist reversal to absorb longitudinal expansion
US3261907A (en) High frequency power cable
US3775552A (en) Miniature coaxial cable assembly
US2276571A (en) Splicing method
US3678177A (en) Telecommunication cables
US20030106704A1 (en) Electrical cable apparatus
US1883269A (en) Electrical conductor
US3647932A (en) Transposed conductor for dynamoelectric machines
US3118015A (en) Balanced transposition for stranded conductor with asymmetrically disposed strand ends
US1144252A (en) Electrical conductor.
US2125869A (en) Electrical conductor
US2325549A (en) Ignition cable
US3758704A (en) Hoisting rope
US2978530A (en) Conductor for transformer windings
US483285A (en) auilleaume
US3283280A (en) Transposition for electrical conductors
US2321021A (en) Composite electrical conductor
US4657342A (en) Flexible power cable with profiled core and support member
US2538019A (en) Method of making multicore electrical conductors
US2609653A (en) Helically preformed elements on stranded line
US2214151A (en) Terminal and wire connection
US3291898A (en) High voltage expanded electrical conductors
US2228797A (en) Manufacture of telephone cables
US3368174A (en) Spacer for pancake coils
US1701278A (en) High-tension cable