US2556244A - Coaxial cable with helically wound spacer - Google Patents

Coaxial cable with helically wound spacer Download PDF

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Publication number
US2556244A
US2556244A US70496846A US2556244A US 2556244 A US2556244 A US 2556244A US 70496846 A US70496846 A US 70496846A US 2556244 A US2556244 A US 2556244A
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conductor
inner
cable
tape
material
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Expired - Lifetime
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Weston William Kirby
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International Standard Electric Corp (ISEC)
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International Standard Electric Corp (ISEC)
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00Communication cables or conductors
    • H01B11/18Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
    • H01B11/1834Construction of the insulation between the conductors

Description

June 12, 1951 W. K. WESTON COAXIAL CABLE WITH HELICALLY WOUND SPACER Filed Oct. 22, 1946 7am can INVENTOR- AM K4 WESTON ATTORNEY Patented June 12, 1951 COAXIAL CABLE WITH HELICALLY WOUND SPACER William Kirby Weston, London, England, assignor to International Standard Electric Corpora tion, New York, N. Y.

Application October 22, 1946, Serial No. 704,968 In Great Britain September 7, 1945 2 Claims.

This invention relates to high frequency electric cables of the coaxial conductor type.

In some instances it is advisable to form the inner conductor of a coaxial cable as a hollow tube, as for example when the coaxial cable is made of large diameter, in which case a solid central conductor would unduly increase the weight of the cable. It may be desirable to use the hollow tube functioning as an inner conductor as the outer conductor of a second coaxial cable the inner conductor of which is supported centrally within the hollow tube.

This inner conductor may be formed of a single tape or of a plurality of tapes, but in the interest of minimum attenuation it is desirable that any discontinuities formed by the abutting edges of the tapes should run longitudinally of the cable or as nearly so as possible and thus that the tape or tapes should be folded longitudinally. The edges of these tapes should be held together under pressure, and this may be accomplished by a binding of insulating tapes. This arrangement has been proposed in our U. S. application No. 667,272 filed May 4, 1946, entitled Improvements in or relating to concentric conductor electric cables, now abandoned, which also proposes as a preferred alternative that a layer of a dielectric material be extended over the inner hollow conductor to maintain the latter in circular form. It is also proposed in that application to fill the-whole space between inner and outer conductors with solid dielectric material.

It is, however, desirable to keep the volume of solid dielectric between the inner and outer conductors to a minimum as is well known, and in our U. S. application No. 695,027, filed September 5, 1946, now Patent No. 2,480,170, entitled Improvements in or relating to electric cables for high frequency, it is proposed to use spaces composed of dielectric material formed in two or more portions, which when placed together to form a complete washer exert a wedging action upon the tape over the greater part or the hole of the length of the inner conductor. These wedge spacers may be held in place by means of insulative tape or by a thin wall of insulating material extended around them, or, again, by forming the outer conductor immediately around them.

According to the present invention there is provided high frequency electric cable of the coaxial conductor type comprising a hollow inner conductor formed of one or more metallic tapes folded longitudinally in which spacing means between said inner conductor and the outer conductor is provided by one or more helices of low loss dielectric material wound about said inner conductor. These helical spacers may of themselves hold together the edges of the tape or tapes of said inner conductor or alternatively these edges may be held together under pressure by a distinct helix or group of helices of low loss material. This material must not be confused with the insulating tape mentioned above, but would be of substantial thickness compared thereto. Further, it is preferred that the material should be hollow or corrugated so as to form a cross-section the area of which is only partially occupied by solid dielectric.

The invention will now be described in more detail with reference to the accompanying drawings in which Fig. 1 illustrates a cross-section of an electric cable embodying features according to the present invention.

Figure 2 is a cross-sectional view of a high frequency electric cable embodying the present invention in a preferred manner.

In Figs 1' and 2 the inner conductor l of a large diameter coaxial cable consists of a single copper tape folded longitudinally, the edges of the tape abutting as shown at 2. Around thi hollow inner conductor are wound spirally hollow tubes 3 of low loss dielectric material and such as a solid ethylene polymer.

These tubes may be wrapped with insulating tape, 4, of similar material. In the cable illustrated in Fig. 1 the hollow tubes are spaced about the inner conductor without adjacent turns touching, a further group of helical spacers, 5, are wrapped about the first group. The spacers of this second group are shewn as having a corrugated cross-section. Low loss insulating material of any convenient cross-sectional shape may be used in place of those shewn at 3 and 5, but it is to be preferred that the cross-sectional area defined thereby should only partially be occupied by the solid dielectric. It is also to be preferred that the lay of thesecond set of helices be in the opposite sense to that of the first group. This second group of spacing elements may also be wrapped with insulating tape 6 if desired. The first group may be considered functionally as means for holding together under pressure the edges 2 of the inner conductor, while the insulators 5 serve primarily as spacing members in addition to 3.

In both Figs. 1 and 2, outer conductors I are provided by any of the usual arrangements. The spacers inside the hollow inner conductors i may each accommodate, for example, a further conductor 8 separated from conductor I by means of the usual washers 9.

In Fig. 2 it will be observed that six helices 3 are provided and that the insulators are of the same diameter as the inner conductor l. Neglecting the thickness of tape 4 this arrangement would provide a cable with a ratio outer/inner conductors of 3:1. It is well known, that in order to obtain a minimum attenuation constant, this ration should be approximately 3.6 to 1. With a multiple grouping of spacing helices as in Fig. 1 there is no difficulty in arranging this, but there is much to be said for having the insulators touching one another and forming a single group to lock the inner conductors edges 2 and simultaneously to provide the necessary spacing means. Accordingly, in a further preferred embodiment, the insulating members 3 of Fig. 2 are made over size and squeezed into position in contact with adjacent members and with the inner conductor; their cross-section is thereby deformed from being circulated with the result that they may be made to take up the extra radialspace to provide the correct ratio of diameters for the two conductors.

Having now particularly described and ascertained the nature of our said invention and in what manner the same is to be performed, We .declare that what we claim is:

l. A high frequency coaxial cable that comprises a tubular inner conductor formed of a metaltape longitudinally folded whereby its longitudinal edges are disposed in opposed relationship; a plurality of tubular spacers, formed of insulating material and wound side by side helically around the inner conductor; and a tubular outer conductor surrounding the helically wound spacers, having a diameter related to the diameter of. the inner conductor in approximately the ratio of 3.6 l, the'diameter of the tubular spacers being such that they are compressed and distorted by the outer conductor and press against the inner conductor in a manner causing the 0pposing longitudinal edges of the folded tape to press against each other.

2. A high frequency coaxial cable according to claim 1 further characterized in that a layer of insulating tape is helically wound around the helically wound spacers, the lay of the tape being in an opposite sense to the lay of the spacers.

WILLIAM KIRBY WESTON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,859,390 Green May 24, 1932 1,978,418 Dudley Oct. 30, 1934 2,116,267 Klimmer May 3, 1938 2,381,003 Ryan Aug. 7, 1945 FOREIGN PATENTS Number Country Date 526,702 Great Britain Sept. 24, 1940

US2556244A 1945-09-07 1946-10-22 Coaxial cable with helically wound spacer Expired - Lifetime US2556244A (en)

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BE (1) BE480485A (en)
FR (1) FR939277A (en)

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2847499A (en) * 1954-06-16 1958-08-12 Preformed Line Products Co Coaxial cable
US2998472A (en) * 1958-04-23 1961-08-29 Lewis A Bondon Insulated electrical conductor and method of manufacture
DE1120534B (en) * 1960-08-16 1961-12-28 Norddeutsche Kabelwerke A G High frequency cable in which act as spacers Hoses made of insulating material
US3055967A (en) * 1961-05-29 1962-09-25 Lewis A Bondon Coaxial cable with low effective dielectric constant and process of manufacture
US3126438A (en) * 1956-06-08 1964-03-24 Lorrin
US3750058A (en) * 1971-12-08 1973-07-31 Bell Telephone Labor Inc Waveguide structure utilizing compliant helical support
US4705914A (en) * 1985-10-18 1987-11-10 Bondon Lewis A High voltage flexible cable for pressurized gas insulated transmission line
US4767890A (en) * 1986-11-17 1988-08-30 Magnan David L High fidelity audio cable
US4963420A (en) * 1986-05-16 1990-10-16 Institut Francais Du Petrole Filler and floatability material - manufacturing process and tubular units that incorporate this material
US5742002A (en) * 1995-07-20 1998-04-21 Andrew Corporation Air-dielectric coaxial cable with hollow spacer element
US5796046A (en) * 1996-06-24 1998-08-18 Alcatel Na Cable Systems, Inc. Communication cable having a striated cable jacket
US20040055779A1 (en) * 2002-09-24 2004-03-25 David Wiekhorst Communication wire
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
US20060032660A1 (en) * 2003-12-22 2006-02-16 Parke Daniel J Finned jackets for LAN cables
US20060180111A1 (en) * 2005-02-15 2006-08-17 Champion Aerospace, Inc. Air-cooled ignition lead
US20060274581A1 (en) * 2005-06-03 2006-12-07 Marco Redaelli Reference scheme for a non-volatile semiconductor memory device
US20070209824A1 (en) * 2006-03-09 2007-09-13 Spring Stutzman Multi-pair cable with channeled jackets
US20070295526A1 (en) * 2006-06-21 2007-12-27 Spring Stutzman Multi-pair cable with varying lay length
US20070295527A1 (en) * 2006-06-22 2007-12-27 Spring Stutzman Twisted pairs cable with shielding arrangement
US20090025958A1 (en) * 2002-09-24 2009-01-29 Adc Incorporated Communication wire
US20090078439A1 (en) * 2007-07-12 2009-03-26 David Wiekhorst Telecommunication wire with low dielectric constant insulator
US7511225B2 (en) 2002-09-24 2009-03-31 Adc Incorporated Communication wire
US20090308618A1 (en) * 2008-06-13 2009-12-17 Baker Hughes Incorporated System and method for supporting power cable in downhole tubing
US20100000753A1 (en) * 2008-07-03 2010-01-07 Adc Telecommunications, Inc. Telecommunications Wire Having a Channeled Dielectric Insulator and Methods for Manufacturing the Same
US7674981B1 (en) * 2008-09-25 2010-03-09 Alcatel-Lucent Usa Inc. Structured dielectric for coaxial cable
US20100078179A1 (en) * 2008-09-26 2010-04-01 Baker Hughes Incorporated Electrocoil Tubing Cable Anchor Method
US20100148889A1 (en) * 2007-04-25 2010-06-17 Peter Bohmer High-frequency component having low dielectric losses
US20110209892A1 (en) * 2008-10-30 2011-09-01 Huber+Suhner Ag Coaxial cable
US9355755B2 (en) 2011-04-07 2016-05-31 3M Innovative Properties Company High speed transmission cable
US20170066392A1 (en) * 2015-09-09 2017-03-09 Yazaki Corporation Wire harness

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3204021A (en) * 1960-05-17 1965-08-31 Reynolds Metals Co Vibrationless cable construction

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1859390A (en) * 1929-05-23 1932-05-24 American Telephone & Telegraph Concentric conductor system
US1978418A (en) * 1930-10-08 1934-10-30 Bell Telephone Labor Inc Concentric return multiconductor cable
US2116267A (en) * 1934-11-15 1938-05-03 Felten & Guilleaume Carlswerk Conductor with air space insulation
GB526702A (en) * 1939-03-24 1940-09-24 Telegraph Constr & Maintenance Improvements in or relating to high frequency electric cables
US2381003A (en) * 1942-11-05 1945-08-07 Fed Telephone & Radio Corp Insulated electric conductor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1859390A (en) * 1929-05-23 1932-05-24 American Telephone & Telegraph Concentric conductor system
US1978418A (en) * 1930-10-08 1934-10-30 Bell Telephone Labor Inc Concentric return multiconductor cable
US2116267A (en) * 1934-11-15 1938-05-03 Felten & Guilleaume Carlswerk Conductor with air space insulation
GB526702A (en) * 1939-03-24 1940-09-24 Telegraph Constr & Maintenance Improvements in or relating to high frequency electric cables
US2381003A (en) * 1942-11-05 1945-08-07 Fed Telephone & Radio Corp Insulated electric conductor

Cited By (79)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2847499A (en) * 1954-06-16 1958-08-12 Preformed Line Products Co Coaxial cable
US3126438A (en) * 1956-06-08 1964-03-24 Lorrin
US2998472A (en) * 1958-04-23 1961-08-29 Lewis A Bondon Insulated electrical conductor and method of manufacture
DE1120534B (en) * 1960-08-16 1961-12-28 Norddeutsche Kabelwerke A G High frequency cable in which act as spacers Hoses made of insulating material
US3055967A (en) * 1961-05-29 1962-09-25 Lewis A Bondon Coaxial cable with low effective dielectric constant and process of manufacture
US3750058A (en) * 1971-12-08 1973-07-31 Bell Telephone Labor Inc Waveguide structure utilizing compliant helical support
US4705914A (en) * 1985-10-18 1987-11-10 Bondon Lewis A High voltage flexible cable for pressurized gas insulated transmission line
US4963420A (en) * 1986-05-16 1990-10-16 Institut Francais Du Petrole Filler and floatability material - manufacturing process and tubular units that incorporate this material
US4767890A (en) * 1986-11-17 1988-08-30 Magnan David L High fidelity audio cable
US5742002A (en) * 1995-07-20 1998-04-21 Andrew Corporation Air-dielectric coaxial cable with hollow spacer element
US5796046A (en) * 1996-06-24 1998-08-18 Alcatel Na Cable Systems, Inc. Communication cable having a striated cable jacket
US7238886B2 (en) 2002-09-24 2007-07-03 Adc Incorporated Communication wire
US20040216913A1 (en) * 2002-09-24 2004-11-04 David Wiekhorst Communication wire
US9336928B2 (en) 2002-09-24 2016-05-10 Commscope Technologies Llc Communication wire
US8664531B2 (en) 2002-09-24 2014-03-04 Adc Telecommunications, Inc. Communication wire
US20050167146A1 (en) * 2002-09-24 2005-08-04 Adc Incorporated Communication wire
US8624116B2 (en) 2002-09-24 2014-01-07 Adc Telecommunications, Inc. Communication wire
US20050167148A1 (en) * 2002-09-24 2005-08-04 Adc Incorporated Located Communication wire
US8525030B2 (en) 2002-09-24 2013-09-03 Adc Telecommunications, Inc. Communication wire
US8237054B2 (en) 2002-09-24 2012-08-07 Adc Telecommunications, Inc. Communication wire
US7759578B2 (en) 2002-09-24 2010-07-20 Adc Telecommunications, Inc. Communication wire
US20100132977A1 (en) * 2002-09-24 2010-06-03 Adc Telecommunications, Inc. Communication wire
US20100078193A1 (en) * 2002-09-24 2010-04-01 ADC Incorporation Communication wire
US7511225B2 (en) 2002-09-24 2009-03-31 Adc Incorporated Communication wire
US7511221B2 (en) 2002-09-24 2009-03-31 Adc Incorporated Communication wire
US7214880B2 (en) 2002-09-24 2007-05-08 Adc Incorporated Communication wire
US20090025958A1 (en) * 2002-09-24 2009-01-29 Adc Incorporated Communication wire
US20040055779A1 (en) * 2002-09-24 2004-03-25 David Wiekhorst Communication wire
US20080066944A1 (en) * 2002-09-24 2008-03-20 Adc Incorporated Communication wire
US7560648B2 (en) 2002-09-24 2009-07-14 Adc Telecommunications, Inc Communication wire
US7875800B2 (en) 2003-10-31 2011-01-25 Adc Telecommunications, Inc. Cable with offset filler
US8375694B2 (en) 2003-10-31 2013-02-19 Adc Telecommunications, Inc. Cable with offset filler
US7115815B2 (en) 2003-10-31 2006-10-03 Adc Telecommunications, Inc. Cable utilizing varying lay length mechanisms to minimize alien crosstalk
US20050205289A1 (en) * 2003-10-31 2005-09-22 Adc Incorporated Cable with offset filler
US7220919B2 (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
US7220918B2 (en) 2003-10-31 2007-05-22 Adc Incorporated Cable with offset filler
US20050167151A1 (en) * 2003-10-31 2005-08-04 Adc Incorporated Cable with offset filler
US20050092515A1 (en) * 2003-10-31 2005-05-05 Robert Kenny Cable with offset filler
US20070102189A1 (en) * 2003-10-31 2007-05-10 Robert Kenny Cable with offset filler
US9142335B2 (en) 2003-10-31 2015-09-22 Tyco Electronics Services Gmbh Cable with offset filler
US7214884B2 (en) 2003-10-31 2007-05-08 Adc Incorporated Cable with offset filler
US7498518B2 (en) 2003-10-31 2009-03-03 Adc Telecommunications, Inc. Cable with offset filler
US20050092514A1 (en) * 2003-10-31 2005-05-05 Robert Kenny Cable utilizing varying lay length mechanisms to minimize alien crosstalk
US20090266577A1 (en) * 2003-10-31 2009-10-29 Adc Incorporated Cable with offset filler
US20050247479A1 (en) * 2003-10-31 2005-11-10 Adc Incorporated Cable with offset filler
US20060032660A1 (en) * 2003-12-22 2006-02-16 Parke Daniel J Finned jackets for LAN cables
US20060180111A1 (en) * 2005-02-15 2006-08-17 Champion Aerospace, Inc. Air-cooled ignition lead
US7124724B2 (en) * 2005-02-15 2006-10-24 Champion Aerospace, Inc. Air-cooled ignition lead
US20060274581A1 (en) * 2005-06-03 2006-12-07 Marco Redaelli Reference scheme for a non-volatile semiconductor memory device
US20070209824A1 (en) * 2006-03-09 2007-09-13 Spring Stutzman Multi-pair cable with channeled jackets
US7629536B2 (en) 2006-03-09 2009-12-08 Adc Telecommunications, Inc. Multi-pair cable with channeled jackets
US7271344B1 (en) 2006-03-09 2007-09-18 Adc Telecommunications, Inc. Multi-pair cable with channeled jackets
US20080115959A1 (en) * 2006-03-09 2008-05-22 Adc Telecommunications, Inc. Multi-pair cable with channeled jackets
US7375284B2 (en) 2006-06-21 2008-05-20 Adc Telecommunications, Inc. Multi-pair cable with varying lay length
US20070295526A1 (en) * 2006-06-21 2007-12-27 Spring Stutzman Multi-pair cable with varying lay length
US20080283274A1 (en) * 2006-06-21 2008-11-20 Adc Telecommunications, Inc. Multi-pair cable with varying lay length
US7550676B2 (en) 2006-06-21 2009-06-23 Adc Telecommunications, Inc. Multi-pair cable with varying lay length
US20070295527A1 (en) * 2006-06-22 2007-12-27 Spring Stutzman Twisted pairs cable with shielding arrangement
US7411131B2 (en) 2006-06-22 2008-08-12 Adc Telecommunications, Inc. Twisted pairs cable with shielding arrangement
US20090084576A1 (en) * 2006-06-22 2009-04-02 Adc Telecommunications, Inc. Twisted pairs cable with shielding arrangement
US7763805B2 (en) 2006-06-22 2010-07-27 Adc Telecommunications, Inc. Twisted pairs cable with shielding arrangement
US20100148889A1 (en) * 2007-04-25 2010-06-17 Peter Bohmer High-frequency component having low dielectric losses
US7816606B2 (en) 2007-07-12 2010-10-19 Adc Telecommunications, Inc. Telecommunication wire with low dielectric constant insulator
US20090078439A1 (en) * 2007-07-12 2009-03-26 David Wiekhorst Telecommunication wire with low dielectric constant insulator
US20090308618A1 (en) * 2008-06-13 2009-12-17 Baker Hughes Incorporated System and method for supporting power cable in downhole tubing
US7849928B2 (en) * 2008-06-13 2010-12-14 Baker Hughes Incorporated System and method for supporting power cable in downhole tubing
US8022302B2 (en) 2008-07-03 2011-09-20 ADS Telecommunications, Inc. Telecommunications wire having a channeled dielectric insulator and methods for manufacturing the same
US20100000753A1 (en) * 2008-07-03 2010-01-07 Adc Telecommunications, Inc. Telecommunications Wire Having a Channeled Dielectric Insulator and Methods for Manufacturing the Same
US8641844B2 (en) 2008-07-03 2014-02-04 Adc Telecommunications, Inc. Telecommunications wire having a channeled dielectric insulator and methods for manufacturing the same
US9870846B2 (en) 2008-07-03 2018-01-16 Commscope Technologies Llc Telecommunications wire having a channeled dielectric insulator and methods for manufacturing the same
US20100071929A1 (en) * 2008-09-25 2010-03-25 Lucent Technologies Inc. Structured dielectric for coaxial cable
US7674981B1 (en) * 2008-09-25 2010-03-09 Alcatel-Lucent Usa Inc. Structured dielectric for coaxial cable
US20100078179A1 (en) * 2008-09-26 2010-04-01 Baker Hughes Incorporated Electrocoil Tubing Cable Anchor Method
US7905295B2 (en) * 2008-09-26 2011-03-15 Baker Hughes Incorporated Electrocoil tubing cable anchor method
US20110209892A1 (en) * 2008-10-30 2011-09-01 Huber+Suhner Ag Coaxial cable
US9355755B2 (en) 2011-04-07 2016-05-31 3M Innovative Properties Company High speed transmission cable
US9799425B2 (en) 2011-04-07 2017-10-24 3M Innovative Properties Company High speed transmission cable
US20170066392A1 (en) * 2015-09-09 2017-03-09 Yazaki Corporation Wire harness

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BE480485A (en) grant
FR939277A (en) 1948-11-09 grant

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