EP0004146B1 - Electrical connector comprising a crimping ferrule - Google Patents

Electrical connector comprising a crimping ferrule Download PDF

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Publication number
EP0004146B1
EP0004146B1 EP79300267A EP79300267A EP0004146B1 EP 0004146 B1 EP0004146 B1 EP 0004146B1 EP 79300267 A EP79300267 A EP 79300267A EP 79300267 A EP79300267 A EP 79300267A EP 0004146 B1 EP0004146 B1 EP 0004146B1
Authority
EP
European Patent Office
Prior art keywords
metal sleeve
crimping ferrule
connector
crimping
sleeve
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
Application number
EP79300267A
Other languages
German (de)
French (fr)
Other versions
EP0004146A1 (en
Inventor
Wilhelm Cornelis Johannes Esser
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
Publication of EP0004146A1 publication Critical patent/EP0004146A1/en
Application granted granted Critical
Publication of EP0004146B1 publication Critical patent/EP0004146B1/en
Expired 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
    • 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
    • H01R4/203—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 having an uneven wire-receiving surface to improve the contact
    • H01R4/206—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 having an uneven wire-receiving surface to improve the contact with transversal grooves or threads

Definitions

  • This invention relates to an electrical connector.
  • an electrical connector which comprises an electrical terminal having a contact end and a crimping ferrule for connection to an electrical conductor, the crimping ferrule being received in a metal sleeve which extends beyond the end of the crimping ferrule in the direction away from the contact end of the terminal, the metal sleeve in turn being received in an outer sleeve of electrically insulating material.
  • a bared end portion of the conductor of an insulated electrical conductor is inserted into the crimping ferrule of the terminal through the metal sleeve, with an insulated portion of the conductor positioned in the portion of the metal sleeve which extends beyond the crimping ferrule of the terminal.
  • the crimping ferrule is then crimped on to the conductor through the overlying outer insulating sleeve and the metal sleeve, both of which are also permanently deformed by such crimping, and the portion of the metal sleeve which extends beyond the crimping ferrule is crimped about the insulation of the conductor through the overlying outer insulating sleeve which is also permanently deformed by this crimping.
  • the metal sleeve serves to protect the conductor from bending stresses which would otherwise occur at the position where the conductor enters the crimping ferrule of the terminal.
  • the terminal can be made, for example by stamping and forming, from relatively thin stock material whereby the contact end thereof can be given desirable spring properties, the metal sleeve serving to increase the thickness of metal at the crimping ferrule of the terminal, thereby to ensure reliable crimping of the terminal to the conductor.
  • an electrical connector comprising an electrical terminal having a contact end and a crimping ferrule for connection to an electrical conductor, the crimping ferrule being received in a metal sleeve which extends beyond the end of the crimping ferrule in the direction away from the contact end of the terminal, the metal sleeve in turn being received in an outer sleeve of electrically insulating material, is characterised in that the metal sleeve is a seamless member having a relatively thick wall over the portion overlying the crimping ferrule, and a relatively thin wall over the portion extending beyond the end of the crimping ferrule.
  • the connector of this invention has the advantage that the two portions of this metal sleeve inherently have the necessary characteristics to enable the connector to be easily and reliably crimped to an insulated conductor, while allowing the terminal to be of any desired form, for example stamped and formed from resilient sheet metal.
  • Figure 1 shows a seamless circular cross-section metal sleeve 1 having a relatively thick wall portion 2 and a relatively thin wall portion 3.
  • Such a metal sleeve can be formed by conventional metal working techniques.
  • an intermediate portion 4 providing a funnel entry 5 from the portion 3 into the portion 2.
  • the intermediate portion 4 also provides a shoulder 6 facing into the portion 2.
  • the free end 7 of the portion 3 is flared outwardly to provide a funnel entry thereto.
  • FIG 2 shows the metal sleeve 1 received in an outer sleeve 8 of electrically insulating plastics material, which outer sleeve 8 extends beyond the free end 7 of the portion 3 of the sleeve 1.
  • Figure 3 shows the complete connector which includes an electrical terminal 9 having a receptacle contact end 10 for mating with a flat tab (not shown) and a crimping ferrule 11 of known form for connection to an electrical conductor, the crimping ferrule 11 being received in the portion 2 of the metal sleeve 1 with its insertion limited by the shoulder 6 therein.
  • the insulation 12 is stripped from a portion at the end of an insulated electrical conductor 13, and the end portion is then inserted into the free end of the outer sleeve 8 with the end of the conductor 13 being guided into the crimping ferrule 11 by the funnel entry 5 of the metal sleeve 1, which funnel entry 5 also serves to limit insertion of the conductor by engagement of the insulation 12 on the conductor with the funnel entry 5.
  • the crimping ferrule 11 is then crimped down on to the conductor 13 through the outer sleeve 8 and the portion 2 of the metal sleeve 1, and the portion 3 of the metal sleeve 1 can be crimped down on to the insulation 12 of the conductor through the outer sleeve 8, in known manner.
  • the relatively thick wall of the portion 2 of the metal sleeve 1 ensures reliable crimping of the connector 1 on to the conductor 13 even when the material from which the terminal 9 is made is relatively thin as may be necessary to ensure the necessary spring properties for the receptacle end 10 thereof, while the relatively thin wall of the portion 3 of the metal sleeve 1 allows for easy crimping of this portion on to the insulation 12 of the conductor. Further, the absence of a seam in the metal sleeve 1 ensures that the metal sleeve 1 will not relax after crimping as could occur if the metal sleeve 1 had a longitudinally extending open seam as found in some known connectors.

Description

  • This invention relates to an electrical connector.
  • From U.S. Patent Specification No. 3,356,987 an electrical connector is known which comprises an electrical terminal having a contact end and a crimping ferrule for connection to an electrical conductor, the crimping ferrule being received in a metal sleeve which extends beyond the end of the crimping ferrule in the direction away from the contact end of the terminal, the metal sleeve in turn being received in an outer sleeve of electrically insulating material.
  • For use of such a connector, a bared end portion of the conductor of an insulated electrical conductor is inserted into the crimping ferrule of the terminal through the metal sleeve, with an insulated portion of the conductor positioned in the portion of the metal sleeve which extends beyond the crimping ferrule of the terminal.
  • The crimping ferrule is then crimped on to the conductor through the overlying outer insulating sleeve and the metal sleeve, both of which are also permanently deformed by such crimping, and the portion of the metal sleeve which extends beyond the crimping ferrule is crimped about the insulation of the conductor through the overlying outer insulating sleeve which is also permanently deformed by this crimping.
  • After such crimping the metal sleeve serves to protect the conductor from bending stresses which would otherwise occur at the position where the conductor enters the crimping ferrule of the terminal. Further, with such a connector the terminal can be made, for example by stamping and forming, from relatively thin stock material whereby the contact end thereof can be given desirable spring properties, the metal sleeve serving to increase the thickness of metal at the crimping ferrule of the terminal, thereby to ensure reliable crimping of the terminal to the conductor.
  • However, difficulties still arise with such connectors since if the metal sleeve is made sufficiently thick to ensure satisfactory crimping at the crimping ferrule, then it is often too thick for satisfactory crimping of the portion thereof overlying the conductor insulation to be easily carried out without damaging the conductor.
  • According to this invention an electrical connector comprising an electrical terminal having a contact end and a crimping ferrule for connection to an electrical conductor, the crimping ferrule being received in a metal sleeve which extends beyond the end of the crimping ferrule in the direction away from the contact end of the terminal, the metal sleeve in turn being received in an outer sleeve of electrically insulating material, is characterised in that the metal sleeve is a seamless member having a relatively thick wall over the portion overlying the crimping ferrule, and a relatively thin wall over the portion extending beyond the end of the crimping ferrule.
  • The connector of this invention has the advantage that the two portions of this metal sleeve inherently have the necessary characteristics to enable the connector to be easily and reliably crimped to an insulated conductor, while allowing the terminal to be of any desired form, for example stamped and formed from resilient sheet metal.
  • An electrical terminal having an integrally formed sleeve comprising two axially aligned portions of mutually different wall thickness is disclosed in U.S. Patent Specification No. 3,844,923. However, this terminal is a machined member and is not a member stamped and formed from sheet metal. Further, this known terminal requires the use of a separate metal sleeve positioned inside the thicker wall portion of the integral sleeve of the terminal, and does not utilise an outer metal sleeve with an overlying insulating sleeve as found in the connector of this invention.
  • An electrical connector according to this invention will now be described by way of example with reference to the drawings, in which:-
    • Figure 1 is a side elevational view, partly in cross-section, of a metal sleeve of the connector;
    • Figure 2 is a sectional plan view of the sleeve of Figure 1 received in an outer insulating sleeve of the connector; and
    • Figure 3 is a plan view of the complete connector.
  • Figure 1 shows a seamless circular cross-section metal sleeve 1 having a relatively thick wall portion 2 and a relatively thin wall portion 3. Such a metal sleeve can be formed by conventional metal working techniques.
  • Between the portions 2 and 3 is an intermediate portion 4 providing a funnel entry 5 from the portion 3 into the portion 2. The intermediate portion 4 also provides a shoulder 6 facing into the portion 2.
  • The free end 7 of the portion 3 is flared outwardly to provide a funnel entry thereto.
  • Referring now to Figure 2, this shows the metal sleeve 1 received in an outer sleeve 8 of electrically insulating plastics material, which outer sleeve 8 extends beyond the free end 7 of the portion 3 of the sleeve 1.
  • Figure 3 shows the complete connector which includes an electrical terminal 9 having a receptacle contact end 10 for mating with a flat tab (not shown) and a crimping ferrule 11 of known form for connection to an electrical conductor, the crimping ferrule 11 being received in the portion 2 of the metal sleeve 1 with its insertion limited by the shoulder 6 therein.
  • For use of the connector, the insulation 12 is stripped from a portion at the end of an insulated electrical conductor 13, and the end portion is then inserted into the free end of the outer sleeve 8 with the end of the conductor 13 being guided into the crimping ferrule 11 by the funnel entry 5 of the metal sleeve 1, which funnel entry 5 also serves to limit insertion of the conductor by engagement of the insulation 12 on the conductor with the funnel entry 5. The crimping ferrule 11 is then crimped down on to the conductor 13 through the outer sleeve 8 and the portion 2 of the metal sleeve 1, and the portion 3 of the metal sleeve 1 can be crimped down on to the insulation 12 of the conductor through the outer sleeve 8, in known manner.
  • The relatively thick wall of the portion 2 of the metal sleeve 1 ensures reliable crimping of the connector 1 on to the conductor 13 even when the material from which the terminal 9 is made is relatively thin as may be necessary to ensure the necessary spring properties for the receptacle end 10 thereof, while the relatively thin wall of the portion 3 of the metal sleeve 1 allows for easy crimping of this portion on to the insulation 12 of the conductor. Further, the absence of a seam in the metal sleeve 1 ensures that the metal sleeve 1 will not relax after crimping as could occur if the metal sleeve 1 had a longitudinally extending open seam as found in some known connectors.

Claims (4)

1. An electrical connector comprising an electrical terminal (9) having a contact end (10) and a crimping ferrule (11) for connection to an electrical conductor, the crimping ferrule (11) being received in a metal sleeve (1) which extends beyond the end of the crimping ferrule (11) in the direction away from the contact end (10) of the terminal (9), the metal sleeve (1) in turn being received in an outer sleeve (8) of electrically insulating material, characterised in that the metal sleeve (1) is a seamless member having a relatively thick wall over the portion (2) overlying the crimping ferrule (11), and a relatively thin wall over the portion (3) extending beyond the end of the crimping ferrule (11).
2. A connector as claimed in Claim 1, characterised in that the metal sleeve (1) has an intermediate portion (4) between the relatively thick wall and relatively thin wall portions (2 and 3), the intermediate portion (4) providing a funnel entry from the thin wall portion (3) into the thick wall portion (2).
3. A connector as claimed in Claim 2, characterised in that the intermediate portion (4) provides a shoulder (6) facing into the thick wall portion (2).
4. A connector as claimed in Claim 2 or Claim 3, characterised in that the free end (7) of the thin wall portion (3) of the metal sleeve (1) is flared outwardly to provide a funnel entry thereto.
EP79300267A 1978-03-08 1979-02-21 Electrical connector comprising a crimping ferrule Expired EP0004146B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB911378 1978-03-08
GB911378 1978-03-08

Publications (2)

Publication Number Publication Date
EP0004146A1 EP0004146A1 (en) 1979-09-19
EP0004146B1 true EP0004146B1 (en) 1981-06-24

Family

ID=9865620

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79300267A Expired EP0004146B1 (en) 1978-03-08 1979-02-21 Electrical connector comprising a crimping ferrule

Country Status (12)

Country Link
EP (1) EP0004146B1 (en)
JP (1) JPS54126989A (en)
AR (1) AR215222A1 (en)
AT (1) AT370259B (en)
BR (1) BR7901386A (en)
CA (1) CA1098601A (en)
DE (1) DE2960427D1 (en)
DK (1) DK147520C (en)
ES (1) ES478380A1 (en)
FI (1) FI67156C (en)
MX (1) MX144918A (en)
NO (1) NO149014C (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4953289A (en) * 1989-06-05 1990-09-04 Pyle Overseas B.V. Conductor terminating method
DE19843886A1 (en) * 1998-09-24 2000-03-30 Grote & Hartmann Cable shoe for electrical conductor wire or cable, has termination sleeve receiving stripped end of conductor wire or cable enclosed coaxially by reinforcing sleeve
DE19908031B4 (en) * 1999-02-24 2009-08-13 Auto-Kabel Management Gmbh Connection of an electrical aluminum cable with a connector made of copper or the like metal
TWI307985B (en) * 2006-03-31 2009-03-21 Ks Terminals Inc Electrical terminal connector and method of fabricating same
JP6522872B2 (en) * 2013-02-22 2019-05-29 古河電気工業株式会社 Crimp terminal, connection structure, connector, and method of manufacturing connection structure

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR925224A (en) * 1944-07-28 1947-08-28 British Insulated Callenders Advanced terminal conductors for electric cables
GB885233A (en) * 1957-06-04 1961-12-20 Gen Electric Co Ltd Improvements in or relating to connections between electric conductors
US2958723A (en) * 1957-10-02 1960-11-01 Thomas & Betts Corp Electrical connector and sealing means therefor
US3356987A (en) * 1966-08-10 1967-12-05 Amp Inc Insulation support and wire guide for an electrical connector
FR2048467A5 (en) * 1969-06-09 1971-03-19 Lucas Industries Ltd
US3844923A (en) * 1973-08-02 1974-10-29 P Sandrock Dangler assembly for electro-chemical installations

Also Published As

Publication number Publication date
DK147520C (en) 1985-07-22
NO790448L (en) 1979-09-11
FI67156C (en) 1985-01-10
JPS54126989A (en) 1979-10-02
MX144918A (en) 1981-12-02
NO149014B (en) 1983-10-17
ES478380A1 (en) 1979-11-01
DK94479A (en) 1979-09-09
ATA147679A (en) 1982-07-15
DK147520B (en) 1984-09-10
AR215222A1 (en) 1979-09-14
EP0004146A1 (en) 1979-09-19
NO149014C (en) 1984-01-25
BR7901386A (en) 1979-10-02
CA1098601A (en) 1981-03-31
FI790742A (en) 1979-09-09
FI67156B (en) 1984-09-28
DE2960427D1 (en) 1981-10-01
AT370259B (en) 1983-03-10

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