US3566007A - Corrugated coaxial cable - Google Patents

Corrugated coaxial cable Download PDF

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Publication number
US3566007A
US3566007A US829364A US3566007DA US3566007A US 3566007 A US3566007 A US 3566007A US 829364 A US829364 A US 829364A US 3566007D A US3566007D A US 3566007DA US 3566007 A US3566007 A US 3566007A
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US
United States
Prior art keywords
cable
shell
coaxial
protective sheath
sheath
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
US829364A
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English (en)
Inventor
Michael Francis O'keefe
Edgar Wilmont Forney Jr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TE Connectivity Corp
Original Assignee
AMP Inc
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Filing date
Publication date
Application filed by AMP Inc filed Critical AMP Inc
Application granted granted Critical
Publication of US3566007A publication Critical patent/US3566007A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/03—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections
    • H01R9/05—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections for coaxial cables
    • H01R9/0503—Connection between two cable ends
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
    • H01R43/058—Crimping mandrels
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/03—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections
    • H01R9/05—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections for coaxial cables
    • H01R9/0518—Connection to outer conductor by crimping or by crimping ferrule

Definitions

  • a connector for use with coaxial cable of a type having a rigid armoring sheath which is corrugated and which surrounds a coaxial outer conductor and an 54 CORRUGATED COAXIAL CABLE inner conductor supported along the center of the cable with 4 Chims, 5 Drawing Figs dielectric material.
  • 'lhe connector includes a one-piece outer conductive shell which is crlmped down directly onto the ar- U-S- Clmoring sheath of the cable at ends and an inner onta t 339/276 structure comprised of a sleeve crimped onto the center con- [51] Int. Cl.
  • the outer shell has an undeformed I Fleld of Search inner diameter uffi ient to pass over the outside of the armor. 91; 339/177, 276; 29/62 ing sheath for installation of the inner contact structure prior to a final positioning of the outer shell and crimping thereof [56] References Cited onto the cable.
  • the outer shell is not much larger in maximum UNITED STATES PATENTS diameter than that of the cable and is relatively smooth to 2,889.394 6/ 1959 Aune l74/88(.2) facilitate multiple usage in coaxial tubes carrying twenty or 3,502,788 3/1970 Albert 174 /88( .2) more coaxial cables.
  • Cables of this construction are combined in ten or more pairs within a heavy metal tube laid underground. Cable systems made of such tubes are extended for hundreds of miles underground with amplifiers located every several miles to maintain an adequate signal level.
  • coaxial cable which is mechanically strong to maintain concentricity and efficient signal transfer in underground usage coupled with the fact that many thousands of miles of individual cable must be laid having tens of thousands of joints has, in turn, created a need for a connector which is mechanically and electrically compatible with the cable but which is inexpensive and can be applied quickly and reliably in the field. Additionally, the connector for such use must be compact so as to be employed in multiple within a protective joint of limited size.
  • the present invention relates to a coaxial connector for coaxial cable having a rigid corrugated protective sheath and particularly to a coaxial splice capable of carrying communication signals of appreciable frequency with minimum loss and signal reflection.
  • the foregoing objects are obtained by the present invention through the use of a connector which had only two parts which must be handled to interconnect the ends of corrugated coaxial cable.
  • One part forms a center contact structure and is comprised of a malleable metal sleeve with dielectric inserts affixed to each end.
  • the other part is a one-piece malleable metal shell internally dimensioned to slide over a cable end so as to permit the center contact structure to be crimped onto the center conductors of the cable with the shell then being positioned over the outer sheath of the cable ends and crimped directly onto the corrugated sheath of the cable.
  • the crimp employed deforms portions of the outer shell in a corrugated fashion to match up with the corrugation of the sheaths and provide a mechanical and an electrical joining of the cable ends.
  • P10. 1 is a perspective view of a tube containing a plurality of coaxial cables interconnected by coaxial connector splices in accordance with the invention.
  • FIG. 2 is a view of an individual splice as shown in FIG. 1 but considerably enlarged;
  • FlG. 3 is a perspective and exploded view of the coaxial splice of FIGS. 1 and 2 separated from dressed coaxial cable ends;
  • FIG. 4 is a longitudinal view in partial section of a splice in accordance with the invention as terminated to corrugated coaxial cable ends and further showing to the left dies in the process of deforming the outer shell against the corrugated sheath of the cable;
  • FIG. 5 is a perspective view of a tool carrying the dies shown in FIG.
  • T represents a tube of a type laid underground to form part of a coaxial cable system.
  • Tube T is typically comprised of a lead shell L lined and covered with a protective plastic S.
  • Tube T typically contains ten pairs of coaxial cables 10 and in addition a number of individual electrical leads. Cables 10 are joined by splices 16 within a protective joint J interconnecting the ends of tubes T.
  • Tubes T containing lengths of cables and leads are installed in a trench with the cable ends being terminated when necessary according to the length thereof. This is typically done in the field and in the trench. Alternatively, splices are made adjacent to the trench with completed joints being then lowered into the trench.
  • the individual cables 10 are shown in FIGS. 2 and 3 comprised of a solid center conductor 12 concentrically mounted within an outer conductor 14 which is secured within a corrugated protective sheath 15.
  • the center conductor 12 is supported concentrically of the outer conductor by dielectric discs fitted within the outer conductor or in certain constructions by dielectric material extending spirally along the length of the cable and wrapped around the center conductor.
  • a typical cable has a solid copper center conductor 12 approximately 0.100 of an inch in diameter with dielectric discs approximately 0.085 of an inch thick formed of polyethylene material spaced every inch along the cable.
  • the outer conductor 14 is 0.004 of an inch copper sheet material formed into a tubular configuration and bonded to the outer sheath 15 which is a tin-plated steel 0.010 of an inch having a soldered butt-lap seam.
  • the resulting cable structure is quite rigid.
  • FIGS. 1, 2 and 4 show a splice version 16 of the invention terminating the ends of cables 10. This termination is designed to mechanically join the cable ends and to electrically join the inner and outer conductive portions of the cable so as to provide a transmission path for signals carried by the cables.
  • the invention splice 16 is comprised of essentially two parts, an outer conductive shell 18 and an inner contact structure 24.
  • the inner contact structure 24 includes a hollow sleeve 26 of a reduced diameter at each end 28 which is fitted within a dielectric support element 32.
  • Support elements 32 each include an inner bore 34 which receives 28 and a pair of ports 36 are included to provide passage for gas in the event the cables are pressurized.
  • the support elements 32 are locked to sleeve 34 by. flairing end portions 28 after the elements have been mounted on the sleeve.
  • the outer shell 18 is comprised of a one-piece. element formed of sheet metal into a tubular configuration having a seam shown as 20 in FIG. 3. Seam 20 is preferably brazed or otherwise jointed to make the piece integral. At each end of 18 is a portion 22 of reduced diameter. The interior diameter of 22, shown as D, is just large enough to fit over the outside of protective sheath 15 of the cable.
  • FIG. 3 shows, to the righthand side, the end portion 22 of a shell 18 positioned over a cable end preparatory to termination.
  • a portion of the outer conductor 14 and the sheath 15 is first removed to expose a portion of the center conductor 12, as shown in FIG. 3.
  • the center contact structure 24 is then placed in position with the center conductors 12 of each cable end inserted therein.
  • Sleeve 26 is then crimped inwardly in the manner shown in FIG. 4 to permanently join the sleeve to the center conductors 12. This may be done by any suitable crimping tool in a standard manner.
  • the shell 18 is slid over the center conductor structure to the position shown in FIG.'4 with portions 22 then deformed inwardly as by crimpingto mechanically and electrically connect the shell to the cable outer sheath 15.
  • a tool 40 used to effect both outer crimps is shown in perspective in FIG.
  • the tool should include a suitable straight action driving mechanism, a variety of which are available in both handand bench-mounted versions.
  • the tool includes an indexing blade 42 which in use is centered within the valley of a corrugation of 15 properly spaced from a cable end. With 42 so positioned, the crimping dies shown in 44 and 46 are then properly aligned in accordance with the remaining corrugations on a cable end.
  • the shell 18 is then worked over the cable end toward 42 and the tool is then operated to drive the dies 44 and 46 relatively together to deform portion 22 of shell 18 inwardly and into the corrugations of 15.
  • the tool is then reversed with the other portion 22 crimped inwardly to terminate the other cable end.
  • the die surfaces are bladelike to result in a series of indentations bringing the metal of 22 into an intimate surface deforming engagement with 15 without crushing the sheath or outer conductor 14.
  • the indexing blade 42 is secured to the fixed dies 44 and is extended inward of the die surface to facilitate cable alignment.
  • the center region of the outer shell 18 is appropriately enlarged by standard design techniques in order to compensate for the increase in diameter of the center contact sleeve 26 which would otherwise adversely affect the characteristic impedance of the connector in this'region.
  • the outer surface of 18 is smooth and not much larger than the cable to facilitate packaging in the manner shown in FIG. 1. 1
  • the splice in the invention includes only two parts which must be physically handled with both parts being of a'configuration to be readily installed by hand in the field. It will be further observed that the terminating procedure is simple and straightforward.
  • splice sleeve 26 was formed of an annealed copper 0.025 of an inch in wall.
  • the insert supports 32 were ofpolyethylene and the outer shell 18 was of annealed copper of 0.020 of an inch in wall thickness. Elements 26 and 18 were both tin plated.
  • a termination like that shown in FIG. 4 was tested mechanically and electrically. It was found that the termination of the center conductors was adequateto prevent center conductor displacement and that the overall termination was capable of standing a tensional load of in excess of 600 pounds, in excess of 300 pounds individually for the center contact and for the outer sleeve. The resulting connection was found to pass signal frequencies without appreciable loss or reflection in excess of 2300 MHz. j'.
  • a coaxial electrical connection comprising: a coaxial cable having an inner conductor and an outer conductor and a sheath including sheet metal having annular corrugations therein to provide a rigid tubular structure, a connector mechanically and electrically secured to said cable and including an inner contact element terminated to the cable inner conductor and an outer conductive member terminated to the cable outer conductor, said outer conductive member comprising a shell of malleable metal including a tubular end portion extended over and receiving therein the cable protective sheath, said end portion being crimped inwardly against said protective sheath forming a series of indentations of a configuration overlying and corresponding to the configuration of said corrugations around the periphery of said protective sheath, said outer member having an outer diameter not much greater than the outer diameter of said protective sheath.
  • connection of claim 1 wherein said shell is comprised of one piece of sheet metal formed into tubular configuration.
  • a splice between coaxial cables each of the type having an inner conductor, an outer conductor and an outer protective sheath formed of corrugated sheet metal comprising: two component parts, one of said parts being comprised of a center contact element including a sleeve of malleable metal receiving and joining together the center conductors of a pair of said coaxial cables and crimped inwardly in electrical and mechanical connection with said center conductors, said one of said parts including further a dielectric element positioned on each end of said sleeve and engaged against an end of a sheath and outer conductor of a corresponding one of the pair of said coaxial cables, the other of said parts being comprised of a shell of malleable metal including at each end a tubular portion received over and crimped inwardly directly against the protective sheath of each of said coaxial cables, said shell being comprised of sheet metal with a series of deformations in said tubular portion, said series overlying said protective sheath of each of said coaxial cables and of
  • said one part consists of said sleeve with said dielectric elements being secured to the ends of said sleeve and in radial-spaced relationship with respect to said shell, and said shell consists of a one-piece metal tubular element.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Multi-Conductor Connections (AREA)
US829364A 1969-06-02 1969-06-02 Corrugated coaxial cable Expired - Lifetime US3566007A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US82936469A 1969-06-02 1969-06-02

Publications (1)

Publication Number Publication Date
US3566007A true US3566007A (en) 1971-02-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
US829364A Expired - Lifetime US3566007A (en) 1969-06-02 1969-06-02 Corrugated coaxial cable

Country Status (9)

Country Link
US (1) US3566007A (fr)
AT (1) AT303154B (fr)
BE (1) BE751281A (fr)
DE (1) DE2025508A1 (fr)
ES (1) ES380251A1 (fr)
FR (1) FR2063885A5 (fr)
GB (1) GB1258208A (fr)
NL (1) NL148450B (fr)
SE (1) SE377868B (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2620747A1 (de) * 1976-05-11 1977-12-01 Raychem Pontoise Sa Verfahren und vorrichtung zur verbindung zweier substrate
US4299028A (en) * 1976-05-10 1981-11-10 Raychem Pontoise S.A. Method for connecting substrates
US4655534A (en) * 1985-03-15 1987-04-07 E. F. Johnson Company Right angle coaxial connector
DE3842294A1 (de) * 1988-12-13 1990-06-21 Tkm Telekommunikation U Elektr Anschlussstecker fuer ein hochfrequenzkabel
US5727100A (en) * 1995-07-29 1998-03-10 Alcatel Kabel Ag & Co Device for connecting two electric aerial cables
US20030194916A1 (en) * 2002-04-16 2003-10-16 Quesnel Wayne L. Compression formed connector for a composite conductor assembly used in transmission line installations and method of constructing the same
US20070249225A1 (en) * 2006-04-25 2007-10-25 Yazaki Corporation Method of attaching terminal and coaxial cable with terminal
US20130098122A1 (en) * 2011-10-19 2013-04-25 Checkpoint Systems, Inc. Cable lock with integral connected metal sheath
US20220028580A1 (en) * 2020-07-27 2022-01-27 Sumitomo Wiring Systems, Ltd. End structure and sleeve of shielded cable

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2889394A (en) * 1954-10-06 1959-06-02 Burndy Corp Shielded and coaxial cable connection
US3502788A (en) * 1968-07-11 1970-03-24 Bell Telephone Labor Inc Electrical connectors for coaxial cables

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2889394A (en) * 1954-10-06 1959-06-02 Burndy Corp Shielded and coaxial cable connection
US3502788A (en) * 1968-07-11 1970-03-24 Bell Telephone Labor Inc Electrical connectors for coaxial cables

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4299028A (en) * 1976-05-10 1981-11-10 Raychem Pontoise S.A. Method for connecting substrates
DE2620747A1 (de) * 1976-05-11 1977-12-01 Raychem Pontoise Sa Verfahren und vorrichtung zur verbindung zweier substrate
US4655534A (en) * 1985-03-15 1987-04-07 E. F. Johnson Company Right angle coaxial connector
DE3842294A1 (de) * 1988-12-13 1990-06-21 Tkm Telekommunikation U Elektr Anschlussstecker fuer ein hochfrequenzkabel
US5727100A (en) * 1995-07-29 1998-03-10 Alcatel Kabel Ag & Co Device for connecting two electric aerial cables
US6805596B2 (en) * 2002-04-16 2004-10-19 Alcoa Fujikura Limited Compression formed connector for a composite conductor assembly used in transmission line installations and method of constructing the same
US20030194916A1 (en) * 2002-04-16 2003-10-16 Quesnel Wayne L. Compression formed connector for a composite conductor assembly used in transmission line installations and method of constructing the same
US20070249225A1 (en) * 2006-04-25 2007-10-25 Yazaki Corporation Method of attaching terminal and coaxial cable with terminal
US7632144B2 (en) * 2006-04-25 2009-12-15 Yazaki Corporation Method of attaching terminal and coaxial cable with terminal
CN101064406B (zh) * 2006-04-25 2011-12-21 矢崎总业株式会社 安装端子的方法和带有端子的同轴电缆
US20130098122A1 (en) * 2011-10-19 2013-04-25 Checkpoint Systems, Inc. Cable lock with integral connected metal sheath
US20220028580A1 (en) * 2020-07-27 2022-01-27 Sumitomo Wiring Systems, Ltd. End structure and sleeve of shielded cable
US11742111B2 (en) * 2020-07-27 2023-08-29 Sumitomo Wiring Systems, Ltd. End structure and sleeve of shielded cable

Also Published As

Publication number Publication date
ES380251A1 (es) 1973-04-16
AT303154B (de) 1972-11-10
DE2025508A1 (fr) 1970-12-23
SE377868B (fr) 1975-07-28
NL148450B (nl) 1976-01-15
FR2063885A5 (fr) 1971-07-09
BE751281A (fr) 1970-11-16
GB1258208A (fr) 1971-12-22
NL7007636A (fr) 1970-12-04

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