US3200190A - Dual ferrule connector for a coaxial cable having a flat braid - Google Patents

Dual ferrule connector for a coaxial cable having a flat braid Download PDF

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Publication number
US3200190A
US3200190A US193503A US19350362A US3200190A US 3200190 A US3200190 A US 3200190A US 193503 A US193503 A US 193503A US 19350362 A US19350362 A US 19350362A US 3200190 A US3200190 A US 3200190A
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US
United States
Prior art keywords
ferrule
braid
cable
conductor
conductors
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
US193503A
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English (en)
Inventor
Jr Edgar W Forney
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
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
Application filed by AMP Inc filed Critical AMP Inc
Priority to US193503A priority Critical patent/US3200190A/en
Priority to DE19631515419D priority patent/DE1515419B1/de
Priority to GB16940/63A priority patent/GB958644A/en
Priority to CH576463A priority patent/CH397808A/fr
Priority to SE5045/63A priority patent/SE305895B/xx
Application granted granted Critical
Publication of US3200190A publication Critical patent/US3200190A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • H01R9/0512—Connections to an additional grounding conductor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
    • H01R4/18—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
    • H01R4/20—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping using a crimping sleeve

Definitions

  • the present invention accomplishes the foregoing objects by providing a one piece construction employing a thin walled outer ferrule capable of being crimped into a relaxation resistent band and a relatively thick inner ferrule of soft conductive eating material capable of being driven by crimping forces into a substantial interface connection with the conductors to be con utilizing abnormal crimping pressures.
  • the outer ferrule serves to evenly distribute crimping forces in a manner making the assembly compatible with the existing crimping tools and additionally serves to hold or restrain the conductors and the inner ferrule against relative movement.
  • the inner ferrule serves to mechanically and electrically engage the conductors to be terminated without imparting excessive tensile and shearing stresses to the flat braid. By reason of its flow characteristics, the inner ferrule is worked into the interstices of the shielding braid and accommodates along its outer diameter the volume of an auxiliary pig-tail lead without breaking the foil ribbons of the braid.
  • the interface connection .achieved by the invention is thereby capable of holding the conductors against relative movement without relying solely upon the insulating material surrounding the cable central conductor.
  • the device of the invention facilitates the rapid and reliable connection of flat braid shielded cable without the use of solder and without the use of complicated crimping devices and procedures.
  • FIGURE 1 is an exploded View of one embodiment of the invention
  • FIGURE 2 is a perspective View of the device of FIG- URE 1 assembled and positioned to receive an auxiliary conductor and a flat ribbon braid shielded cable;
  • FIGURE 3 is a perspective View of the device of FIG- URE 1 showing it in its crimped state
  • FIGURE 4 is a section of FIGURE 3 lines 4-4;
  • FIGURE 5 is a sectional elevation of FIGURE 4 taken along lines 55;
  • FIGURE 6 is a perspective of a further embodiment of the invention capable of accommodating an auxiliary conductor and a flat braid shielded two conductor cable;
  • FIGURE 7 is an enlarged sectional view taken along lines 7-7 of FIGURE 4.
  • FIGURE 8 is a perspective view of a typical flat braid shielded cable included to explain the problem solved by the invention.
  • FIGURE 8 Prior to describing the device of the invention, reference will be made to FIGURE 8 in order to point out the technical aspects of crimping flat braid of shielded cable which give rise to the problems and shortcomings of prior art devices and which make evident the advantages of the invention.
  • the section of cable 1% in FIGURE 8 represents an enlarged View of a typical flat braid shielded cable having a central stranded conductor itlil surrounded by a tubular sheathing of insulating material 104 and a braided jacket of foil-like ribbons 1%.
  • the central conductor 102 and the insulating tubing 1% are dimensionally and materially similar to their counter parts in conventional shielded cables.
  • the ribbons 1% are fiexure sensitive and may be easily severed.
  • the section of cable ltltl in FIGURE 8 includes a portion representative of the deformation which occurs by reason of crimping; the ferrule 1% representing a typical relatively hard ferrule crimped over the cable Ill-t As with any crimp-type ferrule, there will be a reduction in diameter resulting in an elongation or extrusion of the ferrule in turn exposing the conductor to be terminated to forces represented by arrows 114. Additionally, the
  • FIGURE 1 shows an embodiment of the assembly of the invention for use with the flat braid of a single conductor shielded cable.
  • the inner ferrule 26 is comprised of a tube or cylinder having an inner diameter slightly larger than the diameter of the shield. To simplify handling and assembly, the ferrule 26 should be slightly compressed or otherwise retained within the ferrule 24 so as to provide a single piece device.
  • the ferrule 29 comprises a sleeve or tube having a raised portion 24 along its length to accommodate the insertion of an auxiliary conductor or pig-tail grounding lead. The particular size and shape of the raisedportion 24 is determined by the configuration of the auxiliary conductor to be terminated.
  • the raised portion 24 could be considerably flatter than that shown in FIGURE 1 if the pig-tail lead utilized were a fiat strip conductor rather than the cylindrical conductor 43 as shown in FIGURE 2. Furthermore, the raised portion could accommodate more than one pig-tail lead if desired.
  • the Wall thicknesses T and t are determined by the material characteristics of the metals employed in conjunction with the functional requirements of each ferrule.
  • the thickness T of ferrule 26 must be sufiicient to accommodate a partial penetration by the body of the auxiliary conductor along its outer surface and also a working of the ferrule material along its inner surface into the cable braid.
  • the thickness 1 of ferrule Ztl must be sufficient to prevent rupture of the ferrule during crimping and to preclude excessive relaxation of the ferrule thereafter.
  • the inner ferrule 26 must be sufficiently ductile to flow into the interstices of the flat braid under normal crimping pressures and yet, it must be sufficiently resistant to creep to preclude a relaxation of the forces tending to hold the conductors within the assembly. Additionally, the flow characteristics of the inner ferrule 26 must permit the elongation and reduction in cable diameter resulting from crimping without damage to the braid or excessive deformation of the insulation of a printed circuit board.
  • the outer ferrule 20 may be comprised of the usual ferrule material such as tin plated copper. While not shown in FIGURE 1, it is contemplated that the ferrule 263 may include one or more tab-like extensions from either end to serve as additional contact points capable of being soldered or otherwise affixed to the conductors It is further contemplated that the outer ferrule 23 may be surrounded by an insulating sleeve applied in a manner well-known in the art. Additionally, while not shown, it is further contemplated that the invention may be adapted to connect fiat braid cable without the insertion of an auxiliary condu'ctor. In this latter use, the outer ferrule may be of the same configuration as the inner ferrule, i.e., without the raised portion 24:.
  • FIGURE 2 there is shown the ferrulesZil and 26 assembled and aligned to receive a flat braid cable 42 and an auxiliary pig-tail lead 48; both conductors being suitably stripped of their insulating coverings 5i) and 52 to a length L, which should be at least the length of the ferrule assembly. If the size of the ferrule assembly is properly chosen with respect to the cables to be connected, the severed edge of the insulating coatings 5th and 52 will serve to butt against the edge of the outer ferrule and the inner ferrule, respectively, to provide a feel assuring that the cables have been properly inserted.
  • the assembly may then be placed in a suitable crimping tool and crimped to assume the configuration shown in FIGURES 3-5.
  • the configuration of the crimping dies should generally conform to a configuration of the metallic braid. Reference may.
  • the configuration of the insulating material about the center conductor 42 is substantially unchanged with a slight reduction in diameter and, more importantly, without the distortion which would occur if the auxiliary conductor 48 were crimped against the braid.
  • the braid 40 has been driven by crimping forces against the relatively soft insulating material surrounding the central conductor 42 by a relatively soft metal.
  • the inner ferrule metal must be sufficiently hard and resistant to creep or relaxation to maintain its structural integrity when exposed to high is similarly affected by the characteristics of the inner ferrule 26 and the insulating material 43.
  • the elongation and extrusion of the ferrule assembly exerts a minimum stress upon the braid 4-0 by reason of the flow characteristics of the ferrules 26 relative to the now characteristic of the insuapproxirnately 95% tin and 5% antimony; thetin pronection with the cable and yet soft enough, as compared with characteristics of the usual insulating materiahto permit axial flow rather than further radial compression lating sheath 4-3.
  • the ductility of the ferrule I 26 enables the ferrule materials to be worked into the V interstices of the braid 40 to form'projections 44 which interlock the braid and the ferrule assembly against relative transverse movement.
  • thematerial of ferrule 26 is worked into the auxiliary conductor 48 as indicated by numeral 45.
  • the nominal contraction or expansion of the insulating material 43 due either to heat, aging or low temperature exposure, will have no substantial effect on the connection of the ferrule assembly and the conductors 48 and 42 due to the fact that the assembly does not rely upon the insulating material for holding the assembly together.
  • the particular interface connection achieved by the working of the inner ferrule 26 assures that the conductors 48 and 42 will be held against transverse movement even though the insulating material flows into a state of little or no compression.
  • the transition of the conductors 42 and 48 from their normal dimensions to the reduced dimensions achieved during crimping is much smoother than might be achieved by the use of a relatively hard ferrule as in the prior art.
  • This feature is particularly advantageous with regard to the braid which due to its thinness and stiffness may be easily broken by bending.
  • the most typical point of failure in crimp-type terminations is at the point of entry of the conductors into the ferrule assembly.
  • the characteristics of the inner ferrule 26 automatically assure a dimensional relief at this point with the additional advantage that movement of conductors such as 42 and 48 will tend to displace ferrule material rather than place the conductors in a severe breaking flexu re.
  • FIGURE 6 there is shown a further embodiment of the assembly of the invention capable of accommodating two conductor flat braid cable.
  • the interior barrel 62 of the inner ferrule 66 has a cross-sectional configuration approximating that of the cable 7%.
  • the crimping dies utilized with the embodiment of FIGURE 6 should leave the configuration of the ferrules similar to the original configuration of the cable 70 in the manner and for the reasons set forth in the description of the embodiment of FIGURES 1-5.
  • An electrical connection between a cable and a ferrule assembly comprising in combination a shielded cable having at least one central conductor surrounded by an insulating sheath of soft plastic material in turn surrounded by a tight fitting shielding of braid-ed foil-like metal conductors; a tubular crimped ferrule assembly secured to the cable including an inner ductile and conductive ferrule of a material substantially softer than the material of said foil-like metal conductors, and having portions of the interior surface thereof worked into the interstices and against the edges of the foil-like metal conductors; an outer metal ferrule of relatively harder metal material than said inner ferrule encircling and contacting the inner ferrule along its length supporting and retaining the exterior surface of the inner ferrule against dimensional changes.
  • the combination comprising a shielded cable having at least one central conductor surrounded by an insulating sheath of soft plastic material in turn surrounded by a tightly fitted braid of foil-like conductors, a grounding conductor, a ferrule assembly including an inner ductile and conductive ferrule and an outer metal ferrule having the grounding conductor fitted therebetween, the said ferrules being deformed inwardly along the length thereof into a tubular confi uration to effect a connection between the cable braid and the grounding conductor, the said inner ferrule having a thickness substantially greater than the crosss ectional area of the grounding conductor, the material of said inner ferrule being substantially softer than the material of the foil-like conductors and being worked along the interior surface thereof into the interstices between the foil-like conductors with a slight radial deformation of said sheath, the said outer ferrule being of a relatively hard malleable material forming

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  • Coupling Device And Connection With Printed Circuit (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Cable Accessories (AREA)
US193503A 1962-05-09 1962-05-09 Dual ferrule connector for a coaxial cable having a flat braid Expired - Lifetime US3200190A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US193503A US3200190A (en) 1962-05-09 1962-05-09 Dual ferrule connector for a coaxial cable having a flat braid
DE19631515419D DE1515419B1 (de) 1962-05-09 1963-04-24 Andrueckbare Klemme zum Anschluss an den geflochtenen Abschirmmantel eines elektrischen Kabels
GB16940/63A GB958644A (en) 1962-05-09 1963-04-30 Electrical connector
CH576463A CH397808A (fr) 1962-05-09 1963-05-08 Organe de connexion électrique
SE5045/63A SE305895B (fr) 1962-05-09 1963-05-08

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US193503A US3200190A (en) 1962-05-09 1962-05-09 Dual ferrule connector for a coaxial cable having a flat braid

Publications (1)

Publication Number Publication Date
US3200190A true US3200190A (en) 1965-08-10

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Application Number Title Priority Date Filing Date
US193503A Expired - Lifetime US3200190A (en) 1962-05-09 1962-05-09 Dual ferrule connector for a coaxial cable having a flat braid

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US (1) US3200190A (fr)
CH (1) CH397808A (fr)
DE (1) DE1515419B1 (fr)
GB (1) GB958644A (fr)
SE (1) SE305895B (fr)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3527487A (en) * 1967-11-24 1970-09-08 Greening Donald Ltd Mechanical splice
US4150355A (en) * 1978-01-04 1979-04-17 Amp Incorporated Electrical splices for wire wound resistors
EP0003636A3 (fr) * 1978-01-11 1979-09-05 Ccl Systems Limited Assemblage destiné à être comprimé sur un câble à torons ou sur une corde métallique et méthode de compression de l'assemblage
US4264780A (en) * 1979-05-22 1981-04-28 Raychem Pontoise S.A. Heat-recoverable articles
US4271330A (en) * 1978-05-23 1981-06-02 Raychem Pontoise S.A. Heat-recoverable articles
US4282396A (en) * 1979-03-09 1981-08-04 Raychem Pontoise S.A. Heat-recoverable articles
US4563051A (en) * 1984-09-17 1986-01-07 Thomas & Betts Corporation Shielded cable termination and apparatus and components therefor
US4707566A (en) * 1985-07-18 1987-11-17 Raychem Limited Electrical crimp connection
US5051543A (en) * 1989-09-22 1991-09-24 E. I. Du Pont De Nemours And Company Slotted grounding ferrule
US5340230A (en) * 1992-12-30 1994-08-23 Osram Sylvania Inc. Seamless wire connector
US5672065A (en) * 1996-04-22 1997-09-30 Womack; Robert R. Ground rod connecting device
US5769656A (en) * 1996-11-01 1998-06-23 Bamburg; David C. Wound wire terminal assembly
US5864093A (en) * 1996-05-31 1999-01-26 E & J Demark, Inc. Electrical ground connector assembly
US20050071957A1 (en) * 2003-10-07 2005-04-07 Dembicks Tyler J. Crimp
US20050235463A1 (en) * 2003-10-07 2005-10-27 North State Tackle Crimp
US20070079483A1 (en) * 2003-12-05 2007-04-12 Gunnarsson Guomundur Clamped structure and methods for use in trawl mesh and the like
US20180098437A1 (en) * 2016-10-04 2018-04-05 The Charles Stark Draper Laboratory, Inc. Wiring system
WO2019068584A1 (fr) * 2017-10-06 2019-04-11 Tdk Electronics Ag Dispositif d'interconnexion à sertir, agencement serti et procédé de fabrication d'un agencement serti
US20220336968A1 (en) * 2021-04-15 2022-10-20 Te Connectivity Germany Gmbh Integrated cable with processing device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10862228B2 (en) 2018-05-08 2020-12-08 Amphenol Corporation Cable connector and method of terminating a cable

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1575656A (en) * 1923-11-22 1926-03-09 Nathaniel W Stratford Terminal for electrical conductors
US2554813A (en) * 1944-10-20 1951-05-29 Aircraft Marine Prod Inc Swaged electrical connection
US2901528A (en) * 1957-12-24 1959-08-25 Burndy Corp Wire connector

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2536003A (en) * 1946-07-08 1950-12-26 Burndy Engineering Co Inc Coaxial cable connection
DE1097504B (de) * 1953-04-23 1961-01-19 Amp Inc Verfahren zum Herstellen einer elektrischen Verbindung zwischen einem elektrischen Presshuelsenverbinder und einem Aluminiumleiter und Presshuelsenverbinder zur Durchfuehrung des Verfahrens
DE1081534B (de) * 1956-05-07 1960-05-12 Amp Inc Elektrischer Presshuelsenverbinder

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1575656A (en) * 1923-11-22 1926-03-09 Nathaniel W Stratford Terminal for electrical conductors
US2554813A (en) * 1944-10-20 1951-05-29 Aircraft Marine Prod Inc Swaged electrical connection
US2901528A (en) * 1957-12-24 1959-08-25 Burndy Corp Wire connector

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3527487A (en) * 1967-11-24 1970-09-08 Greening Donald Ltd Mechanical splice
US4150355A (en) * 1978-01-04 1979-04-17 Amp Incorporated Electrical splices for wire wound resistors
EP0003636A3 (fr) * 1978-01-11 1979-09-05 Ccl Systems Limited Assemblage destiné à être comprimé sur un câble à torons ou sur une corde métallique et méthode de compression de l'assemblage
US4271330A (en) * 1978-05-23 1981-06-02 Raychem Pontoise S.A. Heat-recoverable articles
US4282396A (en) * 1979-03-09 1981-08-04 Raychem Pontoise S.A. Heat-recoverable articles
US4264780A (en) * 1979-05-22 1981-04-28 Raychem Pontoise S.A. Heat-recoverable articles
US4563051A (en) * 1984-09-17 1986-01-07 Thomas & Betts Corporation Shielded cable termination and apparatus and components therefor
US4707566A (en) * 1985-07-18 1987-11-17 Raychem Limited Electrical crimp connection
EP0210062A3 (en) * 1985-07-18 1988-10-26 Raychem Limited Electrical crimp connection
US5051543A (en) * 1989-09-22 1991-09-24 E. I. Du Pont De Nemours And Company Slotted grounding ferrule
US5340230A (en) * 1992-12-30 1994-08-23 Osram Sylvania Inc. Seamless wire connector
US5672065A (en) * 1996-04-22 1997-09-30 Womack; Robert R. Ground rod connecting device
US5864093A (en) * 1996-05-31 1999-01-26 E & J Demark, Inc. Electrical ground connector assembly
US5769656A (en) * 1996-11-01 1998-06-23 Bamburg; David C. Wound wire terminal assembly
US20050071957A1 (en) * 2003-10-07 2005-04-07 Dembicks Tyler J. Crimp
US20050235463A1 (en) * 2003-10-07 2005-10-27 North State Tackle Crimp
US7032345B2 (en) * 2003-10-07 2006-04-25 North State Tackle Crimp
US20070079483A1 (en) * 2003-12-05 2007-04-12 Gunnarsson Guomundur Clamped structure and methods for use in trawl mesh and the like
US20180098437A1 (en) * 2016-10-04 2018-04-05 The Charles Stark Draper Laboratory, Inc. Wiring system
WO2019068584A1 (fr) * 2017-10-06 2019-04-11 Tdk Electronics Ag Dispositif d'interconnexion à sertir, agencement serti et procédé de fabrication d'un agencement serti
US10971827B2 (en) 2017-10-06 2021-04-06 Tdk Electronics Ag Crimp interconnect device, crimped arrangement and method for making a crimped arrangement
US20220336968A1 (en) * 2021-04-15 2022-10-20 Te Connectivity Germany Gmbh Integrated cable with processing device
US12062875B2 (en) * 2021-04-15 2024-08-13 Te Connectivity Germany Gmbh Integrated cable processing device

Also Published As

Publication number Publication date
CH397808A (fr) 1965-08-31
SE305895B (fr) 1968-11-11
DE1515419B1 (de) 1969-11-06
GB958644A (en) 1964-05-21

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