US2735997A - Electmcal connector - Google Patents

Electmcal connector Download PDF

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Publication number
US2735997A
US2735997A US25262351A US2735997A US 2735997 A US2735997 A US 2735997A US 25262351 A US25262351 A US 25262351A US 2735997 A US2735997 A US 2735997A
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United States
Prior art keywords
ferrule
connector
indents
conductor
electrical
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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
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English (en)
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Publication of US2735997A publication Critical patent/US2735997A/en
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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
    • 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
    • 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
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S248/00—Supports
    • Y10S248/902—Eyeglasses holder

Definitions

  • This invention relates to crimped electrical connectors and particularly to an electrical connector which can be crimped to produce a permanent, mechanically strong, corrosion-resistant electrically conductive connection between a terminal connector and an electrical conductor.
  • the connection is of the known general type which is made by applying the ferrule portion of a connector over the bare end of a wire, or wires, either solid or stranded or a combination thereof, and permanently crimping the connector ferrule onto the conductor.
  • the ferrule is crimped on the conductor so as to produce an intimate electrical contact between the ferrule and the conductor, the metals of the two parts being cold-forged and caused to flow together for this purpose.
  • an electrical connector which has the particular characteristic that it is not subject to mechanical failure, either in formation or in use, but which yet has the characteristic that it can be easily and economically made under mass production conditions, that it is highly conductive to electricity, highly resistant to atmospheric corrosion and is very durable and long lived.
  • a further object is that in addition to the fact that the connector is not subject to mechanical failure, it will retain its superior qualities under torsional and tensile stress and that it may be formed with various types of metals, not only including copper, but aluminum, steel, bronze, etc.
  • the present invention contemplates that the interior of the ferrule shall be serrated, preferably with sharp rimmed troughs or indents with smoothly rounded bottoms.
  • the invention therefore, provides for the necessary and desired intimate electrical contact and mechanical bond between the ferrule and the conductor and yet' it does not subject the connector to mechanical failure by reason of tears started at the indentations i. e., due to' severe deforming of the metal over such indentations therein.
  • igure 1 is a perspective view of a connector embodying the invention showing internal indentations.
  • Figure 2 is a fragmentary perspective view of a blank having V-trcugh serrations as heretofore used.
  • Figure 3 is a view similar to Figure 2 but showing thespherical indents.
  • Figure 4 is a perspective view of a blank for making a ferrule of the type of Figure 1.
  • Figure 5 is a perspective view of an electrical connector crimped on to the end of a multi-strand electrical cable.
  • Figure 6 is a sectional view taken transversely through the crimped connector ferrule of Figures 5 and 8 on line 66 of Figure 8.
  • Figure 7 is a plan view showing the connector and con-.
  • Figure 8 is a view similar to that of Figure 7 showing the parts after crimping.
  • Figure 9 is a vertical section taken through a pair of crimping dies of another type with an electrical connector and a solid wire conductor positioned therebetween, the dies being in open position.
  • Figure 10 is a view similar to that of Figure 9 showing the dies partially closed.
  • Figure 11 is a view similar to that of Figure 9 showing the dies wholly closed.
  • Figurel shows an electrical connector generally in dicated at 20 combining a contact portion 22 anda ferrule portion 24. As shown the ferrule portion 24 is provided with indentations 21 of the dimple typeon its interior surface.
  • Figure 2 shows by contrast sharp-bottomed groove type serrations on enlarged scale, Figure 3 being a fragment on the same. enlarged scale of material having dimple indentations 21 at the sectioned edges and showing also a staggered relation.
  • Figures 5, 7 and 8 show ferrule portion 24' telescoped over the stripped end 26 of an insulated conductor 28 and crimped onto the conductor by indents 30.
  • These indents 30 as shown in these figures, are of a type covered by the Patent No. 2,535,013, and are side-by-side with rounded ends and bottoms spaced from the inner and outer transverse edges of ferrule portion 24.
  • the indents as shown are located one on each side of a brazed seam 34.
  • the metal of the ferrule is drawn down with severe stretching and compression under the die and, especially in the end portions 32, with severe drag against the metal of the wire, which is increased by any serrations or indents which may be present in that area.
  • the present invention avoids setting up lines of stress concentration which would facilitate tearing of the metal.
  • Figure 4 shows a ferrule blank before forming wherein U-type indents, i. e., smoothly rounded bottoms and Pa tented Feb. 21, 1956 sharply square rims 'are'utilized.
  • the indents may be omitted fromthe area of greatest drawing of the metal (32 in Figure as more particularly described and claimed in application Serial No. 224,727, filed May 5, 1951 but it is an advantage of'the invention that that .is not necessary and orienting of the ferrule in the dies is avoided.
  • Figure 6 shows the crimped connection in cross section with the two longitudinal indents 30, the folded and extruded beads 36 along the edges of the indents and the lower nest portion 37. This figure also shows how the metal of the wire 26 is forged into a solid mass and into the indentations 21.0n the interior of the ferrule 24 to produceintimate electrical contact and a strong mechanical engagement with the ferrule 24.
  • FIGs 9, 10 and 11 there are shown upper and lower dies 39 and 40.
  • the connector ferrule is shown at 24 with a solid wide 26a in place therein; and it will be observed that the die 39 has an indentor 42, and the lower die 40 is provided with an arcuate cavity 44, which retains the ferrule during indenting.
  • the conductor as shown is at the smaller end of a range of sizes which may be used, and it may be of considerably larger diameter.
  • Figure 10 shows the ferrule 24 partly collapsed by the indentor 42, and it illustrates how the upper part of the ferrule 24 is deformed downward into contact with conductor 26a.
  • the final configuration is shown in Figure 11 in which the connector ferrule has been compressed, extruded and drawn into the shape as shown while the wire is correspondingly deformed.
  • the wall portions 35a in the inward sloping periphery of the indents have been thinned during the crimping operation.
  • the indents may be rolled or stamped or otherwise formed into a flat blank, as illustrated in Figure 4, after which the blank is rolled up to ferrule form and advantageously is brazed along seam 34, and annealed.
  • the invention is well suited to common production methods and lends itself readily to a variety of modifications and adaptations.
  • An electrical connector comprised of a ferrule portion adapted to be telescoped over and indented onto a bare electrical conductor, the interior of said ferrule portion being provided with smoothly round indents spaced apart and distributed in the areas of its inner face where the ferrule is to'be crimped, the bottom of each indent being farther radially from the central axis of said ferrule portion than adjacent areas of said inner face, whereby to provide a forged interlock and intimate electrical bond with the conductor when it is crimped thereon.
  • An electrical connector comprised of a tubular ferrule adapted to be telescoped over and indent-crimped onto a bare electrical connector, the interior of the ferrule having dimples in staggered relationship such that any lines through adjacent dimples are transverse to the lines of stress which may be imposed by drawing the indent during crimping, the bottom of each dimple being farther radially from the central axis of said ferrule than adjacent interior surfaces of said ferrule surrounding such dimple, whereby the mechanical failure of the ferrule will not be initiated by lines formed by said dimples.
  • An electrical connection comprising an electrical connector ferrule pressure-forged onto a conductor, said ferrule having inner face and said conductor having outer face, said inner face and said outer face being mutually contiguous, said inner face including a plurality of domelike indentations, said outer face including dome-like projections each the complement of an indentation with which it interfits, and said indentations being smoothly rounded so as to avoid concentrations of stress lines and disaligned so as to minimize danger of defining a tear line.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
US25262351 1953-11-09 1951-10-23 Electmcal connector Expired - Lifetime US2735997A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB30952/53A GB744283A (en) 1953-11-09 1953-11-09 Electrical connector

Publications (1)

Publication Number Publication Date
US2735997A true US2735997A (en) 1956-02-21

Family

ID=10315666

Family Applications (1)

Application Number Title Priority Date Filing Date
US25262351 Expired - Lifetime US2735997A (en) 1953-11-09 1951-10-23 Electmcal connector

Country Status (5)

Country Link
US (1) US2735997A (enrdf_load_stackoverflow)
BE (1) BE524449A (enrdf_load_stackoverflow)
CH (1) CH320896A (enrdf_load_stackoverflow)
FR (1) FR1093678A (enrdf_load_stackoverflow)
GB (1) GB744283A (enrdf_load_stackoverflow)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1121220B (de) * 1958-10-17 1962-01-04 Plessey Co Ltd Fluessigkeitsdicht eingekapselter Elektrolytkondensator
US3076256A (en) * 1957-02-12 1963-02-05 Amp Inc Method of making electrical connections
US3496520A (en) * 1967-05-11 1970-02-17 Amp Inc Fuel cell tab
US3568138A (en) * 1968-01-05 1971-03-02 Amp Inc Post terminal connector
US3594702A (en) * 1969-07-31 1971-07-20 Thomas & Betts Corp Connector
US4846739A (en) * 1987-12-08 1989-07-11 Interconnect Devices, Inc. Gas impervious crimp connection
US20100087105A1 (en) * 2008-10-02 2010-04-08 Gump Bruce S Electrical connection system for use on aluminum wires
US20100297894A1 (en) * 2008-02-15 2010-11-25 Sumitomo Wiring Systems, Ltd. Terminal connector and wire harness
JP2012009178A (ja) * 2010-06-22 2012-01-12 Furukawa Electric Co Ltd:The 圧着端子及び圧着端子の製造方法
US20130095708A1 (en) * 2010-03-30 2013-04-18 Kengo Mitose Crimp terminal, connection structural body and connector
US20130130566A1 (en) * 2010-08-04 2013-05-23 Yazaki Corporation Crimp terminal
US8519267B2 (en) 2009-02-16 2013-08-27 Carlisle Interconnect Technologies, Inc. Terminal having integral oxide breaker
US20140004758A1 (en) * 2011-03-08 2014-01-02 Yazaki Corporation Crimping terminal
CN102084547B (zh) * 2008-06-20 2014-01-22 住友电装株式会社 金属端子接头及具有端子的电线
US20160052081A1 (en) * 2013-04-04 2016-02-25 Telsonic Holding Ag Method for connecting a tubular cable lug to a strand produced from aluminium
US9837741B2 (en) * 2015-05-28 2017-12-05 Te Connectivity Germany Gmbh Electrical contact element with a finely structured contact surface
US9985362B2 (en) 2015-10-22 2018-05-29 Carlisle Interconnect Technologies, Inc. Arc resistant power terminal
US10164348B2 (en) 2009-02-16 2018-12-25 Carlisle Interconnect Technologies, Inc. Terminal/connector having integral oxide breaker element
US20200036106A1 (en) * 2018-07-25 2020-01-30 Yazaki Corporation Aluminum electric wire crimping terminal, crimping device and crimping method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4426790A1 (de) * 1994-07-28 1996-02-08 Pfisterer Elektrotech Karl Preßhülse

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1491838A (en) * 1919-12-01 1924-04-29 Zimmerman Otto Terminal connecter for electrical conductors
US1575656A (en) * 1923-11-22 1926-03-09 Nathaniel W Stratford Terminal for electrical conductors
US1833145A (en) * 1925-07-07 1931-11-24 Wilhelm Harold Frederick Connecter
US1942661A (en) * 1931-05-25 1934-01-09 Trico Products Corp Windshield cleaner arm
US2109837A (en) * 1936-01-02 1938-03-01 Grace P Davis Method of joining power transmitting cables
US2379567A (en) * 1941-12-03 1945-07-03 Aircraft Marine Prod Inc Electrical connector
US2535013A (en) * 1946-03-20 1950-12-19 Aircraft Marine Prod Inc Electrical connector
US2604508A (en) * 1947-11-19 1952-07-22 Thomas & Betts Corp Insulation piercing wire connector

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1491838A (en) * 1919-12-01 1924-04-29 Zimmerman Otto Terminal connecter for electrical conductors
US1575656A (en) * 1923-11-22 1926-03-09 Nathaniel W Stratford Terminal for electrical conductors
US1833145A (en) * 1925-07-07 1931-11-24 Wilhelm Harold Frederick Connecter
US1942661A (en) * 1931-05-25 1934-01-09 Trico Products Corp Windshield cleaner arm
US2109837A (en) * 1936-01-02 1938-03-01 Grace P Davis Method of joining power transmitting cables
US2379567A (en) * 1941-12-03 1945-07-03 Aircraft Marine Prod Inc Electrical connector
US2535013A (en) * 1946-03-20 1950-12-19 Aircraft Marine Prod Inc Electrical connector
US2604508A (en) * 1947-11-19 1952-07-22 Thomas & Betts Corp Insulation piercing wire connector

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3076256A (en) * 1957-02-12 1963-02-05 Amp Inc Method of making electrical connections
DE1121220B (de) * 1958-10-17 1962-01-04 Plessey Co Ltd Fluessigkeitsdicht eingekapselter Elektrolytkondensator
US3496520A (en) * 1967-05-11 1970-02-17 Amp Inc Fuel cell tab
US3568138A (en) * 1968-01-05 1971-03-02 Amp Inc Post terminal connector
US3594702A (en) * 1969-07-31 1971-07-20 Thomas & Betts Corp Connector
US4846739A (en) * 1987-12-08 1989-07-11 Interconnect Devices, Inc. Gas impervious crimp connection
US20100297894A1 (en) * 2008-02-15 2010-11-25 Sumitomo Wiring Systems, Ltd. Terminal connector and wire harness
US8303354B2 (en) * 2008-02-15 2012-11-06 Sumitomo Wiring Systems, Ltd. Terminal connector and wire harness
CN102084547B (zh) * 2008-06-20 2014-01-22 住友电装株式会社 金属端子接头及具有端子的电线
US20100087105A1 (en) * 2008-10-02 2010-04-08 Gump Bruce S Electrical connection system for use on aluminum wires
US7722416B2 (en) * 2008-10-02 2010-05-25 Delphi Technologies, Inc. Electrical connection system for use on aluminum wires
CN101714703B (zh) * 2008-10-02 2013-03-13 德尔菲技术公司 用于铝线的电连接系统
US8519267B2 (en) 2009-02-16 2013-08-27 Carlisle Interconnect Technologies, Inc. Terminal having integral oxide breaker
US10164348B2 (en) 2009-02-16 2018-12-25 Carlisle Interconnect Technologies, Inc. Terminal/connector having integral oxide breaker element
US8974258B2 (en) * 2010-03-30 2015-03-10 Furukawa Electric Co., Ltd. Crimp terminal, connection structural body and connector
US20130095708A1 (en) * 2010-03-30 2013-04-18 Kengo Mitose Crimp terminal, connection structural body and connector
JP2012009178A (ja) * 2010-06-22 2012-01-12 Furukawa Electric Co Ltd:The 圧着端子及び圧着端子の製造方法
US9130284B2 (en) * 2010-08-04 2015-09-08 Yazaki Corporation Crimp terminal
US20130130566A1 (en) * 2010-08-04 2013-05-23 Yazaki Corporation Crimp terminal
EP2602872B1 (en) * 2010-08-04 2016-04-27 Yazaki Corporation Crimp terminal
US9099792B2 (en) * 2011-03-08 2015-08-04 Yazaki Corporation Crimping terminal
US20140004758A1 (en) * 2011-03-08 2014-01-02 Yazaki Corporation Crimping terminal
US20160052081A1 (en) * 2013-04-04 2016-02-25 Telsonic Holding Ag Method for connecting a tubular cable lug to a strand produced from aluminium
US9855623B2 (en) * 2013-04-04 2018-01-02 Telsonic Holding Ag Method for connecting a tubular cable lug to a strand produced from aluminium
US9837741B2 (en) * 2015-05-28 2017-12-05 Te Connectivity Germany Gmbh Electrical contact element with a finely structured contact surface
US9985362B2 (en) 2015-10-22 2018-05-29 Carlisle Interconnect Technologies, Inc. Arc resistant power terminal
US20200036106A1 (en) * 2018-07-25 2020-01-30 Yazaki Corporation Aluminum electric wire crimping terminal, crimping device and crimping method
US11095049B2 (en) * 2018-07-25 2021-08-17 Yazaki Corporation Aluminum electric wire crimping terminal, crimping device and crimping method

Also Published As

Publication number Publication date
CH320896A (de) 1957-04-15
BE524449A (enrdf_load_stackoverflow) 1956-03-16
FR1093678A (fr) 1955-05-09
GB744283A (en) 1956-02-01

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