US3322887A - Electrical connection and method of making the same - Google Patents

Electrical connection and method of making the same Download PDF

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Publication number
US3322887A
US3322887A US376941A US37694164A US3322887A US 3322887 A US3322887 A US 3322887A US 376941 A US376941 A US 376941A US 37694164 A US37694164 A US 37694164A US 3322887 A US3322887 A US 3322887A
Authority
US
United States
Prior art keywords
ferrule
support member
depressions
crimping
spring leaf
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
US376941A
Other languages
English (en)
Inventor
Polidori Mario
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 US376941A priority Critical patent/US3322887A/en
Priority to GB23001/65A priority patent/GB1036688A/en
Priority to FR21084A priority patent/FR1437185A/fr
Priority to NL6507686A priority patent/NL6507686A/xx
Priority to JP3607465A priority patent/JPS447905B1/ja
Priority to DE19651465182 priority patent/DE1465182A1/de
Priority to ES0314385A priority patent/ES314385A1/es
Priority to US630686A priority patent/US3470728A/en
Application granted granted Critical
Publication of US3322887A publication Critical patent/US3322887A/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
    • 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
    • H01R43/042—Hand tools for crimping
    • 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
    • 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
    • H01R4/182—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 for flat conductive elements, e.g. flat cables
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/49—Member deformed in situ
    • Y10T403/4991—Both members deformed
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/71—Rod side to plate or side
    • Y10T403/7129—Laterally spaced rods
    • Y10T403/7141—Plural channels in connector

Definitions

  • This invention relates to crimped electrical connections, and more particularly to connector elements and tools for the formation thereof. In the formation of electrical connections, it is customaryto enclose wire ends in an electrically-conductive metal ferrule.
  • the present invention discloses this type of connector element which simultaneously grips a support means after it has been mechanically and electrically compressed onto wires by a suitable crimping tool.
  • a spring leaf is used to bias carbon armature brushes against a commutator.
  • One surface of the connector element presses against the brush so that current-is carried from the armature through the brush to the connector element and subsequently to the wire.
  • the connector element must'be capable of remaining mechanically tight at all times although therefis a differential in the expansion of steel and the metal of the connector element during temperature changes.
  • a primary objective of the present invention to provide a connector element which is capable of being cold-forged onto a spring leaf support means with at least one solid or stranded conductor wire compressed therebetween.
  • a further object is the provision of a connection whereby a softer connector element will deform around a harder support means as a result of crimping pressures from a tool.
  • Another object is to provide a connection having large contact surfaces between the crimped ferrule and the spring leaf so that the ferrule will frictionally engage the spring leaf and give added tensile strength to the connection.
  • Another object is that of providing the combination of a closed ferrule connector element, large surface engaging area, and a cold-forged connection.
  • Another object is to provide a tool head and die set for crimping the electrical connector. Another object is to provide a die set for crimping the electrical connector, which attaches to a scissor action tool head and which closes onto the connector element in a straight-line path. Another object is to provide a new method for obtaining an electrical connection.
  • FIGURE 1 is a perspective view of a connection, according to the present invention.
  • FIGURE 2 is a perspective view of the head of a crimping tool which forms the connection of FIGURE 1;
  • FIGURE 3 is a view of the present tool head in position in a tool
  • FIGURE 4 is a top plan view of the connection of FIGURE 1;
  • FIGURE 5 is a side elevational view of the connection of FIGURE 1 in engagement with a brush;
  • FIGURE 6 is an end view of FIGURE 4.
  • FIGURE 7 is an exploded perspective view of the connection elements before crimping
  • FIGURE 8 is a side elevational view of the tool head in the open position.
  • FIGURE 9 is a view similar to that of FIGURE 8 but showing the tool head closed.
  • the connector element includes a closed rectangular-shaped ferrule 2 formed from electricallyconductive malleable metal, such as, copper, an alloy thereof, or the like. It may be rolled up from a sheet metal blank with its seam brazed, it may be reformed from cylindrical tubing, or it may be formed in any suitable and conventional manner. Ferrule 2 has a passageway 4 therethrough to receive a wire 6 and a spring leaf 8.
  • Compacting or crimping of the ferrule 2, spring leaf 8 and wires 6 is accomplished by a die set D which includes an indenter 10 and a nest 12. Die set D is appropriately affixed to headH Of a preferably air operated tool T, FIGURE 3, of the type completely shown and described in US. Patent No. 2,684,003, which is assigned to the present assignee. While an air or hydraulic-actuated tool is preferable in this case because of excessive crimping'pressures needed and because of production line techniques, it should be noted that head H may be adapted to fit into a manually-operated tool of the type shown and described in US. patent application Ser. No. 420,586 filed Dec. 23, 1964, and assigned to the present assignee. Indenter 10 and nest 12 close onto ferrule 2 in a straightline path (straight action), FIGURE 2, as opposed to the normal arcuate path (scissor action) of a scissor action tool.
  • Nest 12 constitutes one-half of the die set and includes a floor surface 14 onto which the connector element rests in the tool. On one end of floor 14 is a locating block 16 and another locating block 18 as best seen in FIGURE 8. Ferrule 2 abuts block 16 and the end of the spring leaf 8 abuts block 18 when they are placed into the die set to be crimped in order to properly locate the ferrule along spring leaf 8.
  • crimping members 20 are positioned along each side of floor 14 in diametrical relationship and they extend URES l, 4, 5 and 6.
  • Nest 12 has arcuate-shaped slots 30 and 32 below floor 14 through which a pin 33 passes in order to hold the nest on tool head H.
  • Nest 12 also has two guide posts 34 and 36, the extending ends of which slidably project through corresponding holes in indenter as shown.
  • Indenter 10 constitutes the other half of die set D and is pinned to the upper jaw of the tool head H by means of a pin 38 passing through arcuate-shaped slots 40 and 41 in a manner similar to that of slots 30, 32 and pin 33. Indenter 10 is located in diametrical relationship with respect to nest 12 and is positioned with respect thereto by means of guide posts 34 and 36. Indenter 10 includes a rectangular member 42 longitudinally disposed in its central section as illustrated in FIGURES 8 and9. Member 42 engages the top surface of ferrule 2 and compresses that portion of the ferrule onto the wires and spring leaf during crimping.
  • Three outwardly extending crimping members 44 with angled surfaces 44' thereon are positioned along each side of the crimping areas of indenter 10 and they are alter nately spaced with respect to crimping members on adjacent nest 12.
  • members 20 and members 44 indent ferrule 2 along opposite sides thereof in a staggered manner.
  • the indenting line of force is at right angles to the longitudinal axis of ferrule 2 because of the straight-line die action.
  • the indenter and nest are converted from scissor action to straight-line action by means of the pin 33 and slots 30 and 32 of the nest and pin 38 and slots 40 and 41 of the indenter in conjunction with guide posts 34 and 36.
  • Surfaces 56 of indenter 10 engage surfaces 58 of nest 12 when the die set has been moved to its closed position in order to limit the movement of these elements toward each other.
  • the above crimping action causes large interfaces to occur between the connector element and the spring leaf at the top and bottom thereof and interfacial angles between the inside of ferrule 2 and the edges of spring leaf 8.
  • the ferrule is frictionally held onto the spring leaf especially when the material of the spring leaf is harder than that of the ferrule.
  • An electrical connection comprising a flat support member of substantially rectangular cross-sectional configuration and of substantially hard metal having spring characteristics, a ferrule member of substantially softer metal than said sup-port member, conductor means dis posed between one surface of said support member and an opposing surface of said ferrule member, said ferrule member being in engagement with said support member along another surface and sides of said support member with said one surface of said support member and said opposing surface of said ferrule member being directed toward each other thereby securing said conductor means therebetween, a plurality of spaced depressions along each side of said ferrule member, and another plurality of spaced depressions along each side of said ferrule member between the first-mentioned plurality of spaced depressions, said spaced depressions being directed inwardly toward said sides of said support member thereby securing said ferrule member on said support member.
  • An electrical connection comprising a flat support member having a substantially rectangular cross-section and provided with a first surface, a second surface and opposing sides, an electrical conductor means having a first portion and a second portion, said first portion being in engagement with said first surface, and a ferrule member having a first section in snug engagement along said second surface, side sections extending along respective sides and a second section extending inwardly toward said first surface and securing said first portion of said conductor means therebetween with said second portion extending outwardly from said first portion, said side sections having first and second depressions at spaced intervals therealong with said second depressions "being disposed between said first depressions, said depressions being directed inwardly toward said opposing sides of said support member thereby securing said ferrule member on said support member.
  • a method of making an electrical connection between a readily deformable metallic ferrule member of rectangular cross section and a wire means onto a flat support member of springy hard metal comprising the steps of placing the ferrule member on the support member with the wire means disposed between opposing surfaces of said support member and said ferrule member; applying controlled pressure to opposing sections and sides of said ferrule member; pressing the opposing sections inwardly toward respective surfaces of said support member with one of said sections extending along and in engagement with one of said surfaces and the other of said sections pushing said wire means into engagement with the other of said surfaces, and pressing spaced areas of said sides of said ferrule member into securing engagement with respective sides of said support member without deforming said support member.
  • a method of securing a readily deformable metallic ferrule member of rectangular cross section onto a flat References Cited support member of springy hard metal comprising the UNITED STATES PATENTS steps of placing said ferrule member on said support member; applying controlled pressure to the top, bottom and 2724098 55 j' 339 276 sides of said ferrule member; pressing said top and bottom 5 3015683 1/1962 OKeefe et I'M-"84 inwardly toward and into engagement with opposing sur- FOREIGN PATENTS faces of said support member, and pressing said sides in- 688,708 3/1953 Great Britain wardly at spaced locations thereby pressing these loca- 95 8 [1953 Great Britain tions into engagement with opposing sides of said support member to secure said ferrule member on said support 10 LEWIS MYERS Prlmary Examinerme mber with-out deforming said support member. D. L. CLAY, Assistant Examiner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
US376941A 1964-06-22 1964-06-22 Electrical connection and method of making the same Expired - Lifetime US3322887A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US376941A US3322887A (en) 1964-06-22 1964-06-22 Electrical connection and method of making the same
GB23001/65A GB1036688A (en) 1964-06-22 1965-05-31 A method of making an electrical connector assembly, an assembly produced by the method and apparatus for carrying out the method
NL6507686A NL6507686A (de) 1964-06-22 1965-06-16
FR21084A FR1437185A (fr) 1964-06-22 1965-06-16 Connecteur électrique, outil et procédé pour le sertir
JP3607465A JPS447905B1 (de) 1964-06-22 1965-06-18
DE19651465182 DE1465182A1 (de) 1964-06-22 1965-06-19 Verfahren und Vorrichtung zum Verbinden eines elektrischen Drahtes mit einer Blattfeder
ES0314385A ES314385A1 (es) 1964-06-22 1965-06-19 Un metodo de conectar un conductor electrico a un resorte laminar.
US630686A US3470728A (en) 1964-06-22 1967-04-13 Electrical connector crimping tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US376941A US3322887A (en) 1964-06-22 1964-06-22 Electrical connection and method of making the same

Publications (1)

Publication Number Publication Date
US3322887A true US3322887A (en) 1967-05-30

Family

ID=23487123

Family Applications (1)

Application Number Title Priority Date Filing Date
US376941A Expired - Lifetime US3322887A (en) 1964-06-22 1964-06-22 Electrical connection and method of making the same

Country Status (6)

Country Link
US (1) US3322887A (de)
JP (1) JPS447905B1 (de)
DE (1) DE1465182A1 (de)
ES (1) ES314385A1 (de)
GB (1) GB1036688A (de)
NL (1) NL6507686A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3519982A (en) * 1968-11-06 1970-07-07 Gerome R White Jr Method and means of forming electrical connections with conductors
US4204273A (en) * 1977-01-31 1980-05-20 Goldberg Gerald M Construction of illuminating ribbon of light bulbs
US20080160817A1 (en) * 2006-12-12 2008-07-03 Frank Fritsch Brush holder with crimp connection

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4117305C2 (de) * 1991-05-27 1994-07-21 Weidmueller Interface Zange zum Ergreifen und/oder Verpressen von Bearbeitungsgegenständen
AU712177B3 (en) * 1998-10-20 1999-10-28 Utilux Pty Limited Improved crimp connector

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB688708A (en) * 1950-06-21 1953-03-11 Glover & Co Ltd W T Improvements in couplings for stranded electric conductors
GB695389A (en) * 1950-11-29 1953-08-12 Crabtree & Co Ltd J A Improvements in and connected with the terminal ends of electric conductors
US2724098A (en) * 1952-04-09 1955-11-15 Thomas & Betts Corp Electric connectors
US3015683A (en) * 1960-01-21 1962-01-02 Amp Inc Electrical connector

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB688708A (en) * 1950-06-21 1953-03-11 Glover & Co Ltd W T Improvements in couplings for stranded electric conductors
GB695389A (en) * 1950-11-29 1953-08-12 Crabtree & Co Ltd J A Improvements in and connected with the terminal ends of electric conductors
US2724098A (en) * 1952-04-09 1955-11-15 Thomas & Betts Corp Electric connectors
US3015683A (en) * 1960-01-21 1962-01-02 Amp Inc Electrical connector

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3519982A (en) * 1968-11-06 1970-07-07 Gerome R White Jr Method and means of forming electrical connections with conductors
US4204273A (en) * 1977-01-31 1980-05-20 Goldberg Gerald M Construction of illuminating ribbon of light bulbs
US20080160817A1 (en) * 2006-12-12 2008-07-03 Frank Fritsch Brush holder with crimp connection
US7449809B2 (en) * 2006-12-12 2008-11-11 Hilti Aktiengesellschaft Brush holder with crimp connection

Also Published As

Publication number Publication date
GB1036688A (en) 1966-07-20
NL6507686A (de) 1965-12-23
ES314385A1 (es) 1966-03-16
DE1465182A1 (de) 1969-01-16
JPS447905B1 (de) 1969-04-14

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