US3306793A - Method of making coaxial cables - Google Patents

Method of making coaxial cables Download PDF

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Publication number
US3306793A
US3306793A US343240A US34324064A US3306793A US 3306793 A US3306793 A US 3306793A US 343240 A US343240 A US 343240A US 34324064 A US34324064 A US 34324064A US 3306793 A US3306793 A US 3306793A
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United States
Prior art keywords
strip
projections
inner conductor
insulating material
conductor
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Expired - Lifetime
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US343240A
Inventor
Gill Ronald Yaxley
Morel Gerald Alan
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International Standard Electric Corp
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International Standard Electric Corp
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/06—Insulating conductors or cables
    • H01B13/067—Insulating coaxial cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
    • H01B11/1808—Construction of the conductors
    • H01B11/1826—Co-axial cables with at least one longitudinal lapped tape-conductor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
    • H01B11/1834—Construction of the insulation between the conductors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1036—Bending of one piece blank and joining edges to form article
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49117—Conductor or circuit manufacturing
    • Y10T29/49123—Co-axial cable

Definitions

  • a coaxial cable which includes an inner conductor, an outer conductor and a tube of electrical insulating material supporting the outer conductor and composed of at least one folded strip provided with projections which support the inner conductor.
  • a method of manufacturing a coaxial cable which includes the steps forming projections on a strip of electrical insulating material; folding the strip round an inner conductor to form a tube with the projections supporting the inner conductor along the centre of the tube and applying an outer tubular conductor to the outer surface of the tube.
  • FIG. 1 is a perspective view of a strip of polythene
  • FIG. 2 is an end view in the direction of arrow X of FIG. 1;
  • FIG. 3 is a perspective view of a coaxial cable cut away to reveal the strip shown in FIGS. 1 and 2;
  • FIG. 4 is an end view of an alternative polythene strip to that shown in FIG. 1;
  • FIG. 5 is a perspective view of a polythene strip
  • FIG. 6 is a perspective view of a coaxial cable cut away to reveal the strip shown in FIG. 5;
  • FIG. 7 is a perspective view of a polythene strip
  • FIG. 8 is a partly sectioned side view of a coaxial cable including the strip shown in FIG. 6.
  • a polythene strip 1 is provided with projections 2.
  • the projections 2 In the end view (FIG. 2) the projections 2 have the shape of isosceles triangles with angle A equal to 120.
  • the sides 3 and 4 of the strip 1 are in the same plane as the sides of the projections adjacent to them.
  • the strip 1 is shown longitudinally folded round an inner conductor 5 so that the projections 2 form discs 7 spaced along it and the whole is enclosed in an outer conductor 6.
  • the strip 1 with the projections 2 may be produced in any known manner from a preformed strip, for example, by passing a preformed polythene strip between heated forming rollers or by vacuum forming.
  • the strip 1 When the strip 1 has been formed with the projections 2 it is longitudinally folded round an inner conductor 5 which is being unreeled from a supply drum.
  • An outer conductor 6 is then folded round the strip 1 by, for example, longitudinally folding a copper strip round the strip 1 with its longitudinal edges diametrically opposite those of the strip 1.
  • the whole may then be screened with a helically or longitudinally applied steel tape to constitute a coaxial cable core of a single or multi-core cable.
  • the strip 1 may be wound helically upon the inner conductor 1 and the bands of projections 2 arranged at a suitable angle across the strip 1 to form the discs 7.
  • the strip 1 may be divided longitudinally into a num- Referring to FIG. 4 there is shown an alternative polythene strip 8 provided with projections 9 which are the same shape as the projections 2 (FIG. 2).
  • the strip 8 is curved at the base of the projections 9 to the same curvature that the strip 8 takes when it is folded round the inner conductor 5 (FIG. 3). .By curving the strip 8 in this manner the tendency of the strip 8 to form flats at these places when it is folded round the inner conductor 5 is avoided.
  • the projections 13 on the band 11 are the same as the projections 2 (FIG. 2).
  • the intermediate projections 14 on the band 12 are the same as the projections 2 (FIG. 2) whilst the end projections 15 together form a projection 2 (FIG. 2) when the strip 10 is folded round an inner conductor 16.
  • FIGS. 7 and 8 there is shown a polythene strip 18 provided with bands 19 of projections 20 which cross the strip 18 at an angle.
  • the bands 19 are so polythene strip 10 is arranged that when the strip 218 is longitudinally folded her of strips which are placed side by side round the in- 7 ner conductor 5.
  • An outer conductor 23 is provided in the same manner as in FIG. 2.
  • a continuous helix 22 could also be provided by providing a strip 20 with a longitudinal band of projections 20 and winding the strip 20 about the conductor 21 in a helical manner.
  • a number of parallel helices 22 may be provided by suitably sloping the bands 19 across the strip 18 when it is longitudinally folded round the inner conductor 21 or by providing a number of longitudinal bands 19 along the strip 18 when the strip 18 is applied helically to the inner conductor 21.
  • these two members may be bonded together and applied to the inner conductor in one operation.
  • a method of manufacturing a coaxial cable comprising a continuous longitudinal strip of electrical insulating material which includes the steps of:
  • a method as claimed in claim 1 including forming groups of said projections at right angles across said strip to form dis-c supports when folded round said inner conductor at spaced intervals along its length.
  • a method as claimed in claim 1 including forming 3 4 said projections diagonally across said strip to form a 2,897,542 8/ 1959 Isenberg. I helical support. 3,117,902 1/1964 Holz'heinier 1 l56217 References Cited by the Examiner FOREIGN PATENTS UNITED STATES PATENTS 5 428,390 6/ 1911 France- 1,939,264 12/1933 Hill 17429 X 2,269,991 1/1942 Soheldorf 174-28 x LEWIS MYERS W 2,330,381 9/ 1943 Quayle l74--28 J. F. BURNS, D. A. KETTLESTRING'S, H. HUBER- 2;643,327 6/ 1953 Macklenar 174-28 X FELD, Assistant Examiners.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Waveguides (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Manufacturing Of Electric Cables (AREA)
  • Insulated Conductors (AREA)

Description

Feb. 28, 1967 R. Y. GILL ETAL METHOD OF MAKING COAXIAL CABLES 2 Sheets-Sheet 1 Filed Feb. 7, 1964 Inventors RON/440 Y. 67!. L GER/l4 By% 0 AJVOREL Feb. 28, 1967 R. Y. GILL ETAL METHOD OF MAKING COAXIAL CABLES 2 Sheets-Sheet 2 Filed Feb. 7, 1964 mo m M w w Lm n A w 0 rm M w N A) 0 m R 6 y United States Patent 3,306,793 METHOD OF MAKING COAXIAL CABLES Ronald Yaxley Gill and Gerald Alan Morel, both of London, England, assignors to International Standard Electric Corporation, New York, N.Y., a corporation of Delaware Filed Feb. 7, 1964, Ser. No. 343,240 Claims priority, application Great Britain, Mar. 15, 1963, 10,367/63 3 Claims. (Cl. 156-54) This invention relates to coaxial cables.
According to the present invention there is provided a coaxial cable which includes an inner conductor, an outer conductor and a tube of electrical insulating material supporting the outer conductor and composed of at least one folded strip provided with projections which support the inner conductor.
Further according to the present invention there is provided a method of manufacturing a coaxial cable which includes the steps forming projections on a strip of electrical insulating material; folding the strip round an inner conductor to form a tube with the projections supporting the inner conductor along the centre of the tube and applying an outer tubular conductor to the outer surface of the tube.
In the accompanying drawings which, by way of example, illustrate diagrammatically embodiments of the present invention:
FIG. 1 is a perspective view of a strip of polythene;
FIG. 2 is an end view in the direction of arrow X of FIG. 1;
FIG. 3 is a perspective view of a coaxial cable cut away to reveal the strip shown in FIGS. 1 and 2;
FIG. 4 is an end view of an alternative polythene strip to that shown in FIG. 1;
FIG. 5 is a perspective view of a polythene strip;
FIG. 6 is a perspective view of a coaxial cable cut away to reveal the strip shown in FIG. 5;
FIG. 7 is a perspective view of a polythene strip; and
FIG. 8 is a partly sectioned side view of a coaxial cable including the strip shown in FIG. 6.
Referring to FIGS. 1, 2 and 3 a polythene strip 1 is provided with projections 2. In the end view (FIG. 2) the projections 2 have the shape of isosceles triangles with angle A equal to 120. The sides 3 and 4 of the strip 1 are in the same plane as the sides of the projections adjacent to them.
In FIG. 3 the strip 1 is shown longitudinally folded round an inner conductor 5 so that the projections 2 form discs 7 spaced along it and the whole is enclosed in an outer conductor 6.
The strip 1 with the projections 2 may be produced in any known manner from a preformed strip, for example, by passing a preformed polythene strip between heated forming rollers or by vacuum forming. When the strip 1 has been formed with the projections 2 it is longitudinally folded round an inner conductor 5 which is being unreeled from a supply drum. An outer conductor 6 is then folded round the strip 1 by, for example, longitudinally folding a copper strip round the strip 1 with its longitudinal edges diametrically opposite those of the strip 1. The whole may then be screened with a helically or longitudinally applied steel tape to constitute a coaxial cable core of a single or multi-core cable.
If desired the strip 1 may be wound helically upon the inner conductor 1 and the bands of projections 2 arranged at a suitable angle across the strip 1 to form the discs 7.
The strip 1 may be divided longitudinally into a num- Referring to FIG. 4 there is shown an alternative polythene strip 8 provided with projections 9 which are the same shape as the projections 2 (FIG. 2). The strip 8 is curved at the base of the projections 9 to the same curvature that the strip 8 takes when it is folded round the inner conductor 5 (FIG. 3). .By curving the strip 8 in this manner the tendency of the strip 8 to form flats at these places when it is folded round the inner conductor 5 is avoided.
Referring to FIGS. 5 and 6 the provided with alternate bands 11 and 12 of projections. The projections 13 on the band 11 are the same as the projections 2 (FIG. 2). The intermediate projections 14 on the band 12 are the same as the projections 2 (FIG. 2) whilst the end projections 15 together form a projection 2 (FIG. 2) when the strip 10 is folded round an inner conductor 16.
When the strip 10 is folded round the inner conductor 16 the meeting edges of the projections 13 are angularly displaced from the meeting edges of the projections 14. In this manner the projections 13 and 14 tend to hold the inner conductor 16 more rigidly in a central position. An outer conductor 17 is placed round the folded strip 10 in the same manner as in FIG. 2.
Refer-ring to FIGS. 7 and 8 there is shown a polythene strip 18 provided with bands 19 of projections 20 which cross the strip 18 at an angle. The bands 19 are so polythene strip 10 is arranged that when the strip 218 is longitudinally folded her of strips which are placed side by side round the in- 7 ner conductor 5.
round an inner conductor 21 the projections 20 form a continuous 'helix 22 round it. An outer conductor 23 is provided in the same manner as in FIG. 2.
A continuous helix 22 could also be provided by providing a strip 20 with a longitudinal band of projections 20 and winding the strip 20 about the conductor 21 in a helical manner.
In either case a number of parallel helices 22 may be provided by suitably sloping the bands 19 across the strip 18 when it is longitudinally folded round the inner conductor 21 or by providing a number of longitudinal bands 19 along the strip 18 when the strip 18 is applied helically to the inner conductor 21.
By forming the projections on the polythene strip on the top of a heated metal strip which is to form the outer conductor these two members may be bonded together and applied to the inner conductor in one operation.
It is to be understood that the following description of specific examples of this invention is not to be considered as a limitation on its scope.
What we claim is:
1. A method of manufacturing a coaxial cable comprising a continuous longitudinal strip of electrical insulating material which includes the steps of:
forming on a continuous longitudinal strip of electrical insulating material groups of relatively thin contiguous triangulated projections of the same insulating material joined at their base and arrayed thereon transverse to the longitudinal axis thereof;
folding said strip longitudinally about an inner conductor to form a continuous tube so that said projections extend inwardly therefrom and the edges of adjacent projections meet to surround and support said inner conductor centrally and form a plurality of supports at spaced intervals along the length thereof; and
applying an outer tubular conductor to the outer surface of said tube.
2. A method as claimed in claim 1 including forming groups of said projections at right angles across said strip to form dis-c supports when folded round said inner conductor at spaced intervals along its length.
3. A method as claimed in claim 1 including forming 3 4 said projections diagonally across said strip to form a 2,897,542 8/ 1959 Isenberg. I helical support. 3,117,902 1/1964 Holz'heinier 1 l56217 References Cited by the Examiner FOREIGN PATENTS UNITED STATES PATENTS 5 428,390 6/ 1911 France- 1,939,264 12/1933 Hill 17429 X 2,269,991 1/1942 Soheldorf 174-28 x LEWIS MYERS W 2,330,381 9/ 1943 Quayle l74--28 J. F. BURNS, D. A. KETTLESTRING'S, H. HUBER- 2;643,327 6/ 1953 Macklenar 174-28 X FELD, Assistant Examiners.
2,890,739 6/1959 Haines 1562l8 X 10

Claims (1)

1. A METHOD OF MANUFACTURING A COMPRISING A CONTINUOUS LONGITUDINAL STRIP OF ELECTRICAL INSULATING MATERIAL WHICH INCLUDES THE STEPS OF: FORMING ON A CONTINUOUS LONGITUDINAL STRIP OF ELECTRICAL INSULATING MATERIAL GROUPS OF RELATIVELY THIN CONTIGUOUS TRIANGULATED PROJECTIONS OF THE SAME INSULATING MATERIAL JOINED AST THEIR BASE AND ARRAYED THEREON TRANSVERSE TO THE LONGITUDINAL AXIS THEREOF; FOLDING SAID STRIP LONGITUDINALLY ABOUT AN INNER CONDUCTOR TO FORM A CONTINUOUS TUBE SO THAT SAID PROJECTIONS EXTEND INWARDLY THEREFROM AND THE EDGES OF ADJACENT PROJECTIONS MEET TO SURROUND THE SUPPORT
US343240A 1963-03-15 1964-02-07 Method of making coaxial cables Expired - Lifetime US3306793A (en)

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Application Number Priority Date Filing Date Title
GB10367/63A GB988029A (en) 1963-03-15 1963-03-15 Electric cables

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US (1) US3306793A (en)
AT (1) AT262406B (en)
BE (1) BE645220A (en)
CH (1) CH413024A (en)
DE (1) DE1590543A1 (en)
DK (1) DK111208B (en)
GB (1) GB988029A (en)
NL (1) NL6402101A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3629941A (en) * 1967-03-25 1971-12-28 Kabel Metallwerke Ghh Method of forming coaxial conductors of small diameters
US3996414A (en) * 1972-07-27 1976-12-07 Kabel-Und Metallwerke Gutehoffnungshutte Aktiengesellschaft Spacer construction for gas insulated high voltage cable
US4859534A (en) * 1984-11-19 1989-08-22 Chemical Vulcanising Systems (Proprietary) Limited Method and apparatus for repairing a cable
US5880402A (en) * 1996-07-22 1999-03-09 Nugent; Steven Floyd High fidelity audio interconnect cable
US6653555B2 (en) 2001-11-06 2003-11-25 Steven Floyd Nugent Bare-wire interconnect
US20080275438A1 (en) * 2007-05-01 2008-11-06 Vivant Medical, Inc. Accordion style cable stand-off

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8500034D0 (en) * 1985-01-02 1985-02-13 Telephone Cables Ltd Coaxial cables

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR428390A (en) * 1911-04-12 1911-08-29 Willoughby Statham Smith Power cable device
US1939264A (en) * 1930-02-05 1933-12-12 Callenders Cable & Const Co Electric cable
US2269991A (en) * 1940-03-08 1942-01-13 Gen Electric High frequency transmission line
US2330381A (en) * 1941-05-07 1943-09-28 Int Standard Electric Corp Electric communication cable
US2643327A (en) * 1949-12-22 1953-06-23 Albert H Macklenar Ventilated insulating spacing shield for flashlight dry cells
US2890739A (en) * 1954-11-30 1959-06-16 Armstrong Cork Co Segmented insulation and method of installing the same
US2897542A (en) * 1952-12-05 1959-08-04 Hans D Isenberg Apparatus for forming coaxial cables
US3117902A (en) * 1958-10-20 1964-01-14 Fastab Insulations Inc Insulating coverings for enclosures

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR428390A (en) * 1911-04-12 1911-08-29 Willoughby Statham Smith Power cable device
US1939264A (en) * 1930-02-05 1933-12-12 Callenders Cable & Const Co Electric cable
US2269991A (en) * 1940-03-08 1942-01-13 Gen Electric High frequency transmission line
US2330381A (en) * 1941-05-07 1943-09-28 Int Standard Electric Corp Electric communication cable
US2643327A (en) * 1949-12-22 1953-06-23 Albert H Macklenar Ventilated insulating spacing shield for flashlight dry cells
US2897542A (en) * 1952-12-05 1959-08-04 Hans D Isenberg Apparatus for forming coaxial cables
US2890739A (en) * 1954-11-30 1959-06-16 Armstrong Cork Co Segmented insulation and method of installing the same
US3117902A (en) * 1958-10-20 1964-01-14 Fastab Insulations Inc Insulating coverings for enclosures

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3629941A (en) * 1967-03-25 1971-12-28 Kabel Metallwerke Ghh Method of forming coaxial conductors of small diameters
US3996414A (en) * 1972-07-27 1976-12-07 Kabel-Und Metallwerke Gutehoffnungshutte Aktiengesellschaft Spacer construction for gas insulated high voltage cable
US4859534A (en) * 1984-11-19 1989-08-22 Chemical Vulcanising Systems (Proprietary) Limited Method and apparatus for repairing a cable
US5880402A (en) * 1996-07-22 1999-03-09 Nugent; Steven Floyd High fidelity audio interconnect cable
US6653555B2 (en) 2001-11-06 2003-11-25 Steven Floyd Nugent Bare-wire interconnect
US20080275438A1 (en) * 2007-05-01 2008-11-06 Vivant Medical, Inc. Accordion style cable stand-off
US8579886B2 (en) 2007-05-01 2013-11-12 Covidien Lp Accordion style cable stand-off

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CH413024A (en) 1966-05-15
NL6402101A (en) 1964-09-16
DK111208B (en) 1968-07-01
BE645220A (en) 1964-09-16
AT262406B (en) 1968-06-10
GB988029A (en) 1965-03-31
DE1590543A1 (en) 1969-08-28

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