US3259874A - Insulation piercing electrical connectors - Google Patents

Insulation piercing electrical connectors Download PDF

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Publication number
US3259874A
US3259874A US335763A US33576364A US3259874A US 3259874 A US3259874 A US 3259874A US 335763 A US335763 A US 335763A US 33576364 A US33576364 A US 33576364A US 3259874 A US3259874 A US 3259874A
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US
United States
Prior art keywords
conductor
ferrule
insulation
ferrule portion
protuberance
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
US335763A
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English (en)
Inventor
Esser Wilhelm Corneli Johannes
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 US542298A priority Critical patent/US3412701A/en
Application granted granted Critical
Publication of US3259874A publication Critical patent/US3259874A/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
    • 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
    • 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
    • H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
    • H01R4/2495—Insulation penetration combined with permanent deformation of the contact member, e.g. crimping

Definitions

  • This invention relates to insulation piercing electrical connectors suitable for crimping to an insulated conductor to effect electrically conducting contact between the connector and the conductor by lanoe means which pierce the insulation to penetrate the core of the conductor.
  • An insulation piercing electrical connector comprises a terminal ferrule portion having insulation piercing lance means for effecting electrical connection with a conductor core when the ferrule portion is crimped to an insulated conductor and a support ferrule portion presenting a slot or aperture between the terminal ferrule and support ferrule portions, the support ferrule portion having an inwardly directed protuberance of smaller height than the lance means for engaging the conductor insulation when the support ferrule portion is crimped to the conductor.
  • the invention also includes a connector secured to an insulated conductor by crimping of the terminal ferrule and support ferrule portions about the conductor with the lance means penetrating the insulation to engage the conductor core and the protuberance engaging the insulation without penetrating to the core.
  • the invention further includes the method of securing the connector to the insulated conductor by crimping the terminal ferrule portion about the conductor to effect penetration of the lance means into the conductor core and crimping of the support ferrule portion about the conductor to engage the protuberance with the insulation without penetrating to the core, the crimping effecting extrusion of the insulation through the slot or aperture between the ferrule portions.
  • the protuberance is adapted to puncture the outer surface of the insulation and it has been found that substantial increases in pull-out strength are achieved if the protuberance has the form of a square-based pyramid, the apex of the pyramid being open to form lance points at each side of the pyramid.
  • FIGURE 1 is a side view of an insulation piercing electrical connector secured to the end of an insulated conductor
  • FIGURE 2 is a plan view of FIGURE 1;
  • FIGURE 3 is a cross-section taken at the line 3-3 of FIGURE 1, viewed in the direction of the arrows;
  • FIGURE 4 is a side view similar to FIGURE 1 but of the electrical connector before application to the conductor;
  • FIGURE 5 is a plan view of FIGURE 3.
  • FIGURE 6 is a cross section taken on the line 66 of FIGURE 4 viewed in the direction of the arrows.
  • connection of FIGURES 1 to 3 comprises an insulated conductor 1 having a stranded core 2 and a surrounding sheath 3 of insulation.
  • the end of the conductor 1 extends axially through ferrule portions 4 and 5 of a connector 6 having a ring tongue 7 projecting beyond the conductor end.
  • Ring tongue 7 may, of course, have any other suitable configuration.
  • the ferrule portions 4 and 5 are substantially cylindrical and are arranged end-to-end to define a substantially cylindrical body embracing the end of the conductor 1.
  • the ferrule portions 4 and 5 are formed from a single piece of metal and are secured together by a U-section bridge part 8 at a lower part of the connector, seen in FIGURE 1, and above the bridge part 8 is a slot 9 between the ferrule portions 4 and 5 into which the insulation 3 is bulged by extrusion as at 10.
  • the slot extends through substantially half of the conductor cross-section periphery and has radiused ends 11 and bell-mouthed sides 12 to avoid cutting the extruded insulation bulge 10.
  • the ferrule portion 5 is a terminal portion disposed adjacent the end of the conductor 1 and, as seen in FIGURE 1, at its lower side is formed with axial-1y spaced radially inwardly directed insulation piercing lances 13 and 14 which are described below in greater detail in connection with FIGURES 4 to 6.
  • the lances 13 and 14 are of triangular form and extend through more than half of the conductor diameter to penetrate the insulation 3 and engage in electrically conducting contact with strands of the core 2 of the conductor.
  • the ferrule portion 4 is a support portion disposed on a side of the terminal portion 5 remote from the conductor end. At a lower side, as seen in FIGURE 1, the support ferrule portion 4 is formed with an inwardly directed protuberance 15 of height much less than that of the lances 13 and 14 and less than the thickness of the insulation 3.
  • the protuberance 15 is described below in greater detail in connection with FIGURES 4 and 5 and is of generally pyramid form having points which puncture the outer surface of the insulation 3 without penetrating it.
  • the ferrule portions 4 and 5 are crimped to the conductor to define crimped cross-sections of substantially the same form as shown in FIGURE 3 for the support ferrule portion 4.
  • the ferrule portions 4 and 5 are crimped from U-section ferrule-forming portions as described below, the limbs of the U being inturned and indented, longitudinally of the ferrule portions, to compress the insulated conductor into the two-lobed crosssection shown in FIGURE 3. As is shown in FIGURE 3, the protuberance 15 does not penetrate the insulation 3.
  • the ferrule portions 4 and 5 are crimped over substantially their entire lengths but the adjacent ends of the ferrule portions 4 and 5 are suitably free from the crimp dies so that the bell mouths 12 are formed dur- 3 ing the crimping and are not pressed down onto the conductor insulation 3.
  • the insulation is compressed and extruded longitudinally, insulation being extruded longitudinally outwards from the adjacent ends 12 of the ferrule portions being constrained to bulge into the slot 9 between the bell mouths 12, as
  • the connector described is formed into a rolled-up blank having the form shown in FIGURES 4 to 6, in which like reference numerals refer to similar parts.
  • the blank is formed with the ring tongue 7 and the sides of the ferrule portions 4 and 5 are rolled-up to define U-section ferrule-forming portions 4 and 5, as seen in FIGURE 6 for the portion 5.
  • Upper parts of the sides of the U-section ferrule portions 4 and 5 are spaced apart on each side of the section by slots 9.
  • the ferrule-forming portions are joined by the bridge part 8
  • the terminal ferrule-forming portion 5 is formed with lances 13 and 14 which are pushed up from substantially triangular apertures 16 and 17 which extend from a middle of the base on respective opposite sides
  • the support ferrule-forming portion 4 is formed 'with the protuberance midway between ends of portion 4.
  • the ends of the ferrule-forming portion 4 remote from the portion 5 are inclined from the base slightly towards the portion 5.
  • the protuberance 15 is of pyramid form having a square base with a pair of sides of the square extending parallel to the longitudinal axis of the connector.
  • the protuberance is suitably formed by a pyramid-tipped punch when the connector is in flat blank form, the punch being pushed into the blank to push up the metal and define the pyramid protuberance.
  • the punch does not pierce the thickness of the blank but penetrates sufiiciently to break the metal along edges of the pyramid around the apex to define four points around a cross-shaped aperture.
  • the connector is rolled up into the form of FIGURES 4 to 6 which serves partially to close the cross-shaped aperture and move the four points around the aperture closer together.
  • An electrical connection between an insulated conductor and an insulation piercingelectrical connector which comprises a terminal ferrule portion crimped about the conductor and having insulation piercing lance means extending substantially in a plane including the axis of the ferrule portion and penetrating the conductor insulation and effecting connection with the conductor core, a support ferrule portion integral with the terminal ferrule portion, the ferrule portions having a slot therebetween,
  • said support ferrule portion having substantially smaller height than the lance means engaging the conductor insulation without penetrating to the core of the conductor, said protuberance being of square-based pyramid form defining four points about a cruciform aperture, the support ferrule portion being crimped about the conductor and the conductor insulation being extruded longitudinally to bulge outwardly through the slot.
  • An electrical connection between an insulated conductor and an insulation piercing electrical connector which comprises a terminal ferrule portion crimped about the conductor and having insulation piercing lance means extending substantially in a plane including the axis .of the ferrule portion and penetrating the conductor insulation and effecting connection with the conductor core, a
  • an inwardly directed protuberance on said support ferrule portion having substantially smaller height than the'lance means engaging the conductor insulation without penetrating to the core of the conductor, said protuberance being of square-based pyramid form defining four points about a cruciform aperture, the ferrule portions being crimped over regions which terminate short of the slot to form bell-mouthed sections at the sides of said slot, said bell-mouthed sections constraining a bulge of insulation extruded through the slot.
  • An electrical connector for an insulated conductor including a terminal ferrule portion having insulation piercing lance means extending substantially in a plane including the axis of the ferrule portion for effecting electrical connection with the conductor core, a support ferrule portion integral with the terminal ferrule portion, the ferrule portions having a slot therebetween, an inwardly directed protuberance on said support ferrule portion having substantially smaller height than the lance means for engaging the conductor insulation, theprotuberance being of square-based pyramid form open at parallel with the longitudinal axis of the connector.

Landscapes

  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
US335763A 1963-01-17 1964-01-06 Insulation piercing electrical connectors Expired - Lifetime US3259874A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US542298A US3412701A (en) 1964-01-06 1966-04-13 Insulation-piercing electrical connectors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL287854 1963-01-17

Publications (1)

Publication Number Publication Date
US3259874A true US3259874A (en) 1966-07-05

Family

ID=19754355

Family Applications (1)

Application Number Title Priority Date Filing Date
US335763A Expired - Lifetime US3259874A (en) 1963-01-17 1964-01-06 Insulation piercing electrical connectors

Country Status (3)

Country Link
US (1) US3259874A (fr)
CH (1) CH407276A (fr)
GB (1) GB992075A (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3335392A (en) * 1965-07-19 1967-08-08 Essex Wire Corp Terminal construction
US3403372A (en) * 1966-02-03 1968-09-24 Herman B. Stinson Jr. Method of making electrical connections and the connections produced thereby
US3423718A (en) * 1967-01-13 1969-01-21 Amp Inc Terminal with nail lance and support member therefor
US3510829A (en) * 1965-04-28 1970-05-05 Amp Inc Electrical connector
US3963857A (en) * 1974-09-12 1976-06-15 Amp Incorporated Small magnet wire to lead wire termination
US4983133A (en) * 1989-05-31 1991-01-08 Scyoc William C Van Electrical terminal with annular section
EP1408586A1 (fr) * 2002-10-07 2004-04-14 Tyco Electronics AMP GmbH Connecteur à sertir
US20040137802A1 (en) * 2002-10-07 2004-07-15 Wendling Hannes Jahn Crimp connector
US20120329341A1 (en) * 2010-03-15 2012-12-27 Autonetworks Technologies, Ltd. Terminal fitting and electric wire equipped with the same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2192101A (en) * 1986-06-30 1987-12-31 Johnson Electric Ind Mfg Insulation piercing crimp terminal

Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB290696A (en) * 1927-01-17 1928-05-17 Walter Haddon Improvements in or relating to electrical connecting leads
US1807462A (en) * 1927-11-18 1931-05-26 Louisville Frog Switch & Signa Wire connecter
US2302767A (en) * 1940-12-21 1942-11-24 Western Electric Co Terminal for electrical conductors
US2339147A (en) * 1940-07-18 1944-01-11 Sonotone Corp Electrical connector plug
US2501870A (en) * 1945-11-24 1950-03-28 Western Electric Co Terminal for electrical conductors
US2515105A (en) * 1947-08-08 1950-07-11 Allied Electric Products Inc Method of making an electrical connection to an insulated wire
US2648050A (en) * 1950-02-04 1953-08-04 Berg Quentin Electrical connector having insulating piercing barbs
US2680235A (en) * 1949-09-16 1954-06-01 Aircraft Marine Prod Inc Electrical connector
US2783442A (en) * 1953-08-03 1957-02-26 Thomas & Betts Corp Method of and apparatus for forming electric terminals
US2911616A (en) * 1957-06-13 1959-11-03 Raymond L Townsend Strain relief for stranded cable connection
US2927150A (en) * 1955-12-20 1960-03-01 Aircraft Marine Prod Inc Insulation piercing crimp
US2957226A (en) * 1958-05-22 1960-10-25 Burndy Corp Method of manufacturing terminal lugs
US2983898A (en) * 1957-10-04 1961-05-09 Malco Mfg Co Terminal wire crimp and method for forming same
US3064072A (en) * 1960-06-10 1962-11-13 Bell Telephone Labor Inc Connector for insulated conductors
US3077027A (en) * 1958-02-05 1963-02-12 Malco Mfg Co Variable pressure insulation piercing crimp
GB929168A (en) * 1961-02-27 1963-06-19 Amp Inc Electrical connector

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB290696A (en) * 1927-01-17 1928-05-17 Walter Haddon Improvements in or relating to electrical connecting leads
US1807462A (en) * 1927-11-18 1931-05-26 Louisville Frog Switch & Signa Wire connecter
US2339147A (en) * 1940-07-18 1944-01-11 Sonotone Corp Electrical connector plug
US2302767A (en) * 1940-12-21 1942-11-24 Western Electric Co Terminal for electrical conductors
US2501870A (en) * 1945-11-24 1950-03-28 Western Electric Co Terminal for electrical conductors
US2515105A (en) * 1947-08-08 1950-07-11 Allied Electric Products Inc Method of making an electrical connection to an insulated wire
US2680235A (en) * 1949-09-16 1954-06-01 Aircraft Marine Prod Inc Electrical connector
US2648050A (en) * 1950-02-04 1953-08-04 Berg Quentin Electrical connector having insulating piercing barbs
US2783442A (en) * 1953-08-03 1957-02-26 Thomas & Betts Corp Method of and apparatus for forming electric terminals
US2927150A (en) * 1955-12-20 1960-03-01 Aircraft Marine Prod Inc Insulation piercing crimp
US2911616A (en) * 1957-06-13 1959-11-03 Raymond L Townsend Strain relief for stranded cable connection
US2983898A (en) * 1957-10-04 1961-05-09 Malco Mfg Co Terminal wire crimp and method for forming same
US3077027A (en) * 1958-02-05 1963-02-12 Malco Mfg Co Variable pressure insulation piercing crimp
US2957226A (en) * 1958-05-22 1960-10-25 Burndy Corp Method of manufacturing terminal lugs
US3064072A (en) * 1960-06-10 1962-11-13 Bell Telephone Labor Inc Connector for insulated conductors
GB929168A (en) * 1961-02-27 1963-06-19 Amp Inc Electrical connector

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3510829A (en) * 1965-04-28 1970-05-05 Amp Inc Electrical connector
US3335392A (en) * 1965-07-19 1967-08-08 Essex Wire Corp Terminal construction
US3403372A (en) * 1966-02-03 1968-09-24 Herman B. Stinson Jr. Method of making electrical connections and the connections produced thereby
US3423718A (en) * 1967-01-13 1969-01-21 Amp Inc Terminal with nail lance and support member therefor
US3963857A (en) * 1974-09-12 1976-06-15 Amp Incorporated Small magnet wire to lead wire termination
US4983133A (en) * 1989-05-31 1991-01-08 Scyoc William C Van Electrical terminal with annular section
EP1408586A1 (fr) * 2002-10-07 2004-04-14 Tyco Electronics AMP GmbH Connecteur à sertir
US20040137802A1 (en) * 2002-10-07 2004-07-15 Wendling Hannes Jahn Crimp connector
US6799990B2 (en) 2002-10-07 2004-10-05 Tyco Electronics Amp Gmbh Crimp connector
US20120329341A1 (en) * 2010-03-15 2012-12-27 Autonetworks Technologies, Ltd. Terminal fitting and electric wire equipped with the same
US8622776B2 (en) * 2010-03-15 2014-01-07 Autonetworks Technologies, Ltd. Terminal fitting and electric wire equipped with the same

Also Published As

Publication number Publication date
GB992075A (en) 1965-05-12
CH407276A (fr) 1966-02-15

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