US2943293A - Electrical connector - Google Patents

Electrical connector Download PDF

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Publication number
US2943293A
US2943293A US666920A US66692057A US2943293A US 2943293 A US2943293 A US 2943293A US 666920 A US666920 A US 666920A US 66692057 A US66692057 A US 66692057A US 2943293 A US2943293 A US 2943293A
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United States
Prior art keywords
connector
sidewalls
wire
crimped
ferrule
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
US666920A
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English (en)
Inventor
Carl H Bucher
Jr George J Handel
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
Priority to NL106565D priority Critical patent/NL106565C/xx
Priority to NL228724D priority patent/NL228724A/xx
Application filed by AMP Inc filed Critical AMP Inc
Priority to US666920A priority patent/US2943293A/en
Priority to GB17830/58A priority patent/GB852563A/en
Priority to DEA11740U priority patent/DE1825840U/de
Priority to CH6080358A priority patent/CH363391A/de
Priority to FR1197355D priority patent/FR1197355A/fr
Application granted granted Critical
Publication of US2943293A publication Critical patent/US2943293A/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
    • H01R4/183—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 cylindrical elongated bodies, e.g. cables having circular cross-section
    • H01R4/184—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 cylindrical elongated bodies, e.g. cables having circular cross-section comprising a U-shaped wire-receiving portion
    • H01R4/185—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 cylindrical elongated bodies, e.g. cables having circular cross-section comprising a U-shaped wire-receiving portion combined with a U-shaped insulation-receiving portion
    • 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
    • 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
    • H01R4/183—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 cylindrical elongated bodies, e.g. cables having circular cross-section
    • H01R4/184—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 cylindrical elongated bodies, e.g. cables having circular cross-section comprising a U-shaped wire-receiving portion
    • 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
    • H01R4/188—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 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
    • H01R43/048—Crimping apparatus or processes
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
    • H01R13/42—Securing in a demountable manner
    • H01R13/428—Securing in a demountable manner by resilient locking means on the contact members; by locking means on resilient contact members
    • H01R13/432—Securing in a demountable manner by resilient locking means on the contact members; by locking means on resilient contact members by stamped-out resilient tongue snapping behind shoulder in base or case
    • 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
    • Y10T292/00—Closure fasteners
    • Y10T292/08—Bolts
    • Y10T292/096—Sliding
    • Y10T292/0969—Spring projected
    • Y10T292/097—Operating means
    • Y10T292/0997—Rigid

Definitions

  • This invention relates to electrical connectors and terminals, to crimped electrical connections, and to methods of making crimped electrical connections.
  • a further object is to form an improved connection incorporating both an insulation supporting ferrule for a wire and a crimped connection between the conducting strands and the connector.
  • a further object is to form a crimped connectlon in which the axis of the wire is in substantial alignment with the axis of the crimped connection which connects the conducting core or strands of the wire and the connector axis.
  • a further object is to provide a connector which can be crimped onto wires of varying sizes.
  • a further object is to provide a crimped connection by means of which a relatively large cylindrical terminal can be crimpedonto a relatively small diameter wire without the need of intermediate adapters.
  • a still further object is to provide a connector having a substantially uniform cross section in its crimping zone which uniform cross section upon crimping forms both an insulation supporting ferrule for the wire insulation and a mechanically strong, electrically conductive connection between the strands of the wire and the connector.
  • Figure -l is a plan view of a flat blank formed from sheet metal and from which connectors in accordance with the invention are produced;
  • Figures 2, 3 and 4 show a plan view, a side view, and a perspective view respectively of a connector terminal formed from the blank of Figure 1;
  • Figures 5 and 6 show a side view and a perspective view respectively of the connector of Figure 2 as crimped onto the end of a wire;
  • Figure 7 is a view taken along the lines VI1 -VII of Figure 5;
  • FIGS 8 and 9 are views taken along the lines VIII- VIII and IXIX of Figure 2;
  • Figure ,10 is a fragmentary sectional view taken through a die assembly for crimping the connector embodiment shown in Figure 2 and showing such a connector positioned Within the dies for crimping, this view showing the dies in their open position before crimping;
  • a t Figure 11 is a view similar'to Figure 10 showing th diesin the closed position with a crimped connector positioned between the several cn'mpingdies;
  • Figure 12 is a view taken along the lines XII-X11 of Figure 10;
  • Figure 13 is a view similar'to Figure 12 but showing v the dies in the partially closed position
  • Figure 14 is a view taken along the lines XIVXIV of- Figure 11; e
  • Figure 15. is a view taken alongthe lines XV-XV of Figure 10;
  • Figure 16 is a view similar to Figure 15 but showing the dies in the partially closed position
  • Figure 17 is a view taken along the lines XVII-XVII of Figure 11;
  • Figure 18 is a sectional view through a plug board and showing the crimped connector of Figure 6 positioned within the board;
  • Figures 19, 20, and 21 are views taken along the lines XIX'--XIX, XX-XX, and XXI--XXI of Figure 18.
  • the blank from which the illustrative embodiment of the terminal is produced comprises a leading end 2 which is subsequently formed into a projectile-like terminal contact portion and a trailing section 4 which is subsequently formed into a trough-like section adapted for crimping onto a wire.
  • This blank is advantageously formed from sheet metal such as brass or copper by progressive die forming operations and provides parallel edges 6 having semi-circular cut-outs 8 and tapering frontal portions which define a pair of noses 10 on each side of the axis.
  • a central nose 12 projects forwardly from between the noses 10 and is connected by means of a slug or thin strip 14 with the trailing end of the next adjacent blank.
  • .Notches 19 are provided on the edges of the blank between the leading end and the trailing end and these notches merge with. the parallel edges 20fof the trailing end.
  • Parallel slots 22a, 22b extend transversely in the trailing endand between these slots are provided aplurality of depressions 23 which assist in retaining the wire within the crimped connection as explained in detail in the copending application of Kemper M. Hammell, Serial No. 604,544, filed August 16, 1956.
  • a plurality of protrusions 24 in the form of dimples, three such dimples being provided in the disclosed embodiment, one being positioned on the axisof the blank and one being positioned on each side thereof.
  • the trailing end or edge 26 of the blank is notched as shown at 28 and the previously mentioned connecting slug 14 enters this edge between these notches.
  • a pair of relatively narrow notches 25 extend inwardly from edges 20 portion 30.and a trough-like'trailing portion 33.
  • Nose 30 provides an outwardly slanted tab 32, which is formed by severing along a line connecting these slots 16 with the slot 18 and bending the thus severed section of metal outwardly, and also provides a circular opening 31 along its top seam as viewed in Figure 2, formed by the cut-out sections 8 in the blank.
  • the trough-like ferrule-forming or crimp-forming portion 33 of the connector provides sidewalls 34 connected by a base which is identified in its rearward portion by 36b and in its section between slots 22a, 22b by 36a.
  • Obliquely directed flanges are formed as shown at 38 extending from the trailing edge of the terminal which flanges function as stops to prevent insertion of the terminal into a plug board beyond the desired point. These flanges can of course be dispensed where the invention is incorporated into alternative types of terminals and where the terminal is not adapted to be inserted into a plugboard.
  • the conductor in affixing the uncrimped connection onto a conductor having a stripped end, the conductor is positioned between sidewalls 34 with stripped portions extending between slots 22a, 22b and with unstripped portions or insulated portions extending rearwardly beyond the rearmost slot 22b.
  • the electrical crimped connection between the connector and the stripped end of the wire is formed by indenting the base portion 36a inwardly upon itself to form a substantially flat longitudinally extending web 42 ( Figure 7). This web is indented in most instances to a depth suflicient to provide depending flanges 44 which are bent downwardly as shown at 43 from the web, the flanges in turn being reversely bent at 46 to merge with the sides of the crimp as shown at 17.
  • the marginal edge portions of the sidewalls are curled towards each other as shown at 48 and reversely curled downwardly towards the floor of the web as Shown at 50.
  • the conducting strands 52 are thus securely locked between the web and the curled sidewalls of the crimped connection.
  • the portion of the trough-like part of the connector which lies rearwardly of the rearmost slot 22b is deformed in a somewhat different manner than the zone between the slots 22a, 22b, to form an insulation supporting ferrule for insulated parts of the conductor indicated by C.
  • the base 36b of the original uncrimped connector may be substantially unchanged from its original curved shape, but the sidewalls are bent inwardly towards each other asshown at 54 until their edges are brought into abutting relationship. This reformation of this rearward section of the trough-like cross section reduces its cross sectional area and brings the interior surface of this rearward portion into surrounding and confining relationship with the insulation on the Wire.
  • the protrusions or dimples 24 assist in confining the insulation as shown in Figure 21 in that they are pressed against the surface of the insulation and tend to compress it to hold the wire and take up the tensile stresses which might be applied thereto and transmit these stresses directly from the insulation to the connector rather than from the wire through the electrical crimp between slots 22a, 22b to the connector. It is of course, advantageous to transmit tensile stresses from a wire through the insulation to the connector rather than through the conducting strands to the connector in order to avoid damage to the electrical crimp.
  • An additional function of these dimples is to prevent bending of the strands on an extremely short radius when the wire is bent at its point of entry into the connector. These dimples also prevent severe twisting of the wire strands such as might cause them to work harden and fracture.
  • the crimped connection of Fi ure 6 might be formed by a variety of methods and tools however in manufacturing leads having terminals on one or both ends it is desirable to perform the operations in an automatic or a semi-automatic machine providing a single die set by means of which all of the crimping operations can be carried out upon a single closure of the dies.
  • Figures 17 there is shown in detail such a die set and the manner in which the terminal is crimped to produce the completed connection of Figure 6.
  • the dies in these views are shown fragmentarily and it is understood that the arrangement taught by these views might be used on a simple hand operated press, a semi-automatic press, or a fully automatic press and feeding means for manufacturing electrical leads as taught for example in the copending application of Harold A. Kerstetter et al., Serial Number 562,198, filed January 30, 1956.
  • an upper die set relatively movable towards a lower die set, and means for feeding a terminal between the dies when they are open, so that a wire end can be positioned, either manually or automatically, within the terminal and the dies closed to form the completed termination.
  • the upper die set provides an upper crimping die 56 for the insulation supporting portion of the connection, an upper crimping die 58 for the electrical connection between the conductor and the connector, a hold down 62 for retaining the forward end of the connector during crimping, a slugout blade 66 for severing the connecting slugs as the dies are lowered, and suitable spacers 60, 64, for achieving the proper spacing of the dies.
  • the lower die set comprises an anvil 68 adapted for cooperation with ferrule forming crimper 56, anvils 70, 72 adapted for cooperation with crimping die 58, a resiliently mounted support 73, and a shearing blade '74 for cooperation with upper shearing blade 66.
  • Anvils 68, 70 and 72 and shearing blade 74 are fixedly mounted in the disclosed embodiment while support 73 is spring biased to the position of Figure 10 but can be depressed to the position of Figure 11 as explained below.
  • This support 73 provides a bearing surface at 75 and a supporting edge at 77 for supporting the nose portion of the terminal during crimping.
  • a suitable support 76 provides a feed track for a succession of terminals, the next adjacent one of the terminals from one in the die set being shown in Figure 10. 'It is understood that the lower die set and support 76 will ordinarily be secured onto the bed or platen of a suitable press and the upper dies will be carried by a tool holder which in turn will be carried by the ram of. the press.
  • the feeding means for feeding the terminals will in many circumstances be coordinated for movement with the descent of the ram so that an uncrimped terminal is fed between the dies as the ram travels through its cycle, as taught in the aforementioned Kerstetter et al. application.
  • Supporting anvil 70 as shown best in Figure 12, has an upper supporting surface which provides a ridge 78 bordered on each side by edge portions 79 which support the base of the terminal between slots 22a, 22b, while the projectile-like frontal portion of the terminal 30 is supported at 75 and 77 on resiliently mounted support 73.
  • the dies 68, 72 are somewhat lower than the die 70 so that the rearward portion of the terminal is supported only in the zone between the slots.
  • Crimping die 58 which forms the electrical connection between the wire strands and the connector has inwardly converging sidewalls 80 which merge with slightly tapered sidewalls 82. Tapering sidewalls 82, in turn, merge with arcuate surfaces 84 at the top of the die cavity and these arcuate surfaces curve towards each other to form a central cusp 86. As the ram and the die 58 descend, as shown by Figures 12 and 13, the sidewalls 34 of the terminal between notches 19 and 25 are gathered and flexed towards each other by the side 82 of the die until the edges of the sidewalls contact arcuate surfaces 84 at the roof of the die cavity.
  • the insulation supporting ferrule on the end of the connector is formed by die 56 as shown in Figures 15-17.
  • This die provides gathering portions 90 similar to gathering portions 86 of die 58 and sloping sidewalls 92 which merge into a roof section 94 of substantially semi-circular cross section.
  • the cooperating lower anvil 68 provides a simple arcuate upper surface 88 dimensioned to conform to the base of the connector and support it during the crimping operation. Initially as shown in Figure 10 this rearmost portion of the connector beyond the rearrnost one of the slots 22 is positioned above the surface 88 of die 63.
  • Anvil 72 is of substantially the same shape in cross section as anvil 68 and supports the frontal portion of the trough-like section of the connector during the final crimping. During this final crimping it is also desirable to apply a downward force onthe end of the connector in order to prevent its being bent in the zone between the crimped section and end of the nose. To this end the hold down-device 62 contacts the frontal portion of the connector as shown in Figure 11 and prevents any substantial flexure or permanent bending as a result of reaction to the crimping forces applied by crimpers 56, 58 Hold down device 62 is of substantially the same shape as crimping die 56 and is not shown specifically in section.
  • Shearing blade 66 during the initial portion of the descent shears slug 14 at the plane between the face of this blade and block 76.
  • the entire connector then moves downwardly with the slug 14 afiixed to its front and this slug is subsequently sheared as shown at Figure 11 as it is forced against the shearing edge of blade 74.
  • the crimped connection of the invention is formed by first indenting the base of the ferrule between slots 22a, 22b, and subsequently curling the sidewalls between the slots to form the electrical connection and bending the sidewalls near the end of the ferrule-forming portion to form the insulation support. It should be understood that this sequence of the steps is not critical and that the invention can be practiced by first curling the sidewalls and then indenting the base. Where the invention is practiced by the use of a relatively high speed press, the indenting and curling operations will take place within a small fraction of a second and the operation will take place substantially simultaneously.
  • the completed connector of the type shown in the illustrative embodiment is adapted for use in a panel 96 providing a circular opening 98 dimensioned to receive the plug which is inserted through the opening until tab 32 springs outwardly against the back side of the board to lock the connector into place, the wings or flanges 38 functioning as a stop in this connection to prevent insertion of the connector beyond the desired point.
  • the insulation supporting ferrule as shown in Figure 1 provides an arcuate base having substantially the same radius as the radius of opening 98 so that it bears against the surface of this opening over a substantial area;
  • the'sidewa'lls, particularly at the apex of their meeting edges will also bear against the F opening surface and substantially preclude wobbling or movement of the plug within the opening as if this rear portion or insulation supporting ferrule were of circular cross section.
  • Plugs of this type generally are ofia relatively large diameter relative tothe diameter of the wires withwhich they are used and are advantageously formed from strip material by progressive die forming operations. Where the plugs are formed in this manner, the portion of the plug which is crimped onto the wire will usually be adapted only to receive a fairly largediameter wire and in the past recourse has been had to an adaptor to accommodate smaller wires in plugs of relatively large diameters. It will be apparent that the instant invention obviates the need for such an adaptor in that the wire is crimped directly onto the terminal itself.
  • the axis of the wire as crimped in the connector is in substantial alignment with the axis of the plug itself and furthermore is in axial alignment with the crimped strands on the ends of the wire.
  • the axis of the wire will be displaced from the axis of the end strands which are crimped to the connector and this is undesirable in that the strands are bent near their ends and thus weakened.
  • the instant invention avoids thiscondition by deforming or crimping the connector from both sides towards its central axis to pinch the conducting strands and crimp them to the connector.
  • a further advantage of the invention is that a range of wire sizes can be accommodated in a single size connector by controlling the extent to which the base of the connector is indented to form web 42 and further by controlling the extent to which the sidewalls and their edges are bent down toward the web. It will be obvious from Figure 7 that if the web 42 were somewhat shallower than that shown (i.e., if the flanges 43 or 44 were not so high above the surface of the web), a larger wire could be crimped in the same size terminal. Alternatively, the smaller wire can be adopted by making the flanges even larger and pressing or curling the sidewalls into closer engagement with the strands and toward'the web.
  • An electrical connection formed from an initially trough-like connector having a base and upstanding sidewalls, said connector being crimped into engagement with a conductor to form an electrical connection with the conducting strands of said conductor and an insulation supporting ferrule around insulated portions of said conductor, said electrical connection comprising a web formed by inward displacement of said base and having flanges extending from the longitudinal edges thereof, said flanges being reversely curled and merging with said connector sidewalls, said sidewalls being curled towards each other and into engagement with said conducting strands, said insulation supporting ferrule comprising portions of the base of said connector in substantially undeformed condition and adjacent sidewalls, said adjacent sidewalls being bent towards each other and into surrounding relationship with insulated portions of said conductor.
  • the method of crimping the ferrule-forming portion of an electrical connector providing a base having sidewalls extending therefrom onto a conductor comprising the steps of: positioning the stripped end of at least one insulated conductor within said ferruleforming portion with insulation adjacent the end of said conductor disposed within the end section of said ferrulefc-rming portion, indenting the base of said ferrule-forming portion upon itself in the vicinity of said stripped end to form a web having reversely bent flanges extending from the longitudinal edges thereof while substantially simultaneously bending said sidewalls in the vicinity of said stripped ends towards each other and towards said web to form a crimped connection between said stripped end and said connector in the vicinity of said stripped end, and bending said sidewalls of the end section of said ferrule-forming portion towards each other to form an insulation supporting ferrule for said connector.
  • An electrical connector comprising a contact plug portion having an electrical connection with a conductor and having an insulation support for said conductor, said electrical connection and said insulation support having been formed from an initially trough-like portion of said connector having a base and upstanding sidewalls, said electrical connection comprising a web formed by inward displacement of said base and having flanges extending from the longitudinal edges thereof, said flanges being reversely curled and merging with said sidewalls, said sidewalls being curled towards each other and into engagement with the metallic core of said conductor, said insulation support comprising the base of said troughlike portion in substantially undeformed condition and adjacent sidewalls, said adjacent sidewalls being bent towards each other and into surrounding and gripping relationship with insulated portions of said conductor.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Multi-Conductor Connections (AREA)
US666920A 1957-06-20 1957-06-20 Electrical connector Expired - Lifetime US2943293A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
NL106565D NL106565C (en(2012)) 1957-06-20
NL228724D NL228724A (en(2012)) 1957-06-20
US666920A US2943293A (en) 1957-06-20 1957-06-20 Electrical connector
GB17830/58A GB852563A (en) 1957-06-20 1958-06-04 Improvements in electrical connections and in methods of making these electrical connections
DEA11740U DE1825840U (de) 1957-06-20 1958-06-14 An einen einen isoliermantel besitzenden leiter angepresste elektrische verbindungsklemme.
CH6080358A CH363391A (de) 1957-06-20 1958-06-19 Elektrische Verbindung zwischen einer Klemme und einem elektrischen Leiter und Verfahren zur Herstellung dieser Verbindung
FR1197355D FR1197355A (fr) 1957-06-20 1958-06-19 Perfectionnements aux connexions électriques et aux procédés pour les établir

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US666920A US2943293A (en) 1957-06-20 1957-06-20 Electrical connector

Publications (1)

Publication Number Publication Date
US2943293A true US2943293A (en) 1960-06-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
US666920A Expired - Lifetime US2943293A (en) 1957-06-20 1957-06-20 Electrical connector

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US (1) US2943293A (en(2012))
CH (1) CH363391A (en(2012))
DE (1) DE1825840U (en(2012))
FR (1) FR1197355A (en(2012))
GB (1) GB852563A (en(2012))
NL (2) NL228724A (en(2012))

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3227993A (en) * 1960-10-24 1966-01-04 Microdot Inc Electrical connector
US3312930A (en) * 1965-02-10 1967-04-04 Amp Inc Terminal pin assembly
US3320574A (en) * 1963-02-04 1967-05-16 Tuchel Ulrich Two-piece connector
US3420087A (en) * 1963-02-18 1969-01-07 Amp Inc Electrical connector means and method of manufacture
US3517981A (en) * 1966-06-15 1970-06-30 Amp Inc Termination members for fiber optic means
US3696322A (en) * 1970-06-01 1972-10-03 Itt Insulated flat wire terminal
US4015891A (en) * 1974-05-01 1977-04-05 Rist's Wires & Cables Limited Electrical connector
US4269472A (en) * 1979-10-26 1981-05-26 Amp Incorporated Electrical terminal
US4330168A (en) * 1979-06-28 1982-05-18 International Telephone And Telegraph Corporation Electrical contact and method of making same
DE19737863A1 (de) * 1997-08-29 1999-03-04 Whitaker Corp Elektrischer Verbinder, Verfahren zur Herstellung eines Isolationscrimpes und Vorrichtung zur Durchführung des Verfahrens
US20090275247A1 (en) * 2008-05-03 2009-11-05 Michael Richter Contact for a connection box

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3363222A (en) * 1965-12-29 1968-01-09 Amp Inc Coaxial patchcord assembly
US3425029A (en) * 1967-08-24 1969-01-28 Alfred M Zak Electrical terminal
FR2164013A5 (en(2012)) * 1971-12-09 1973-07-27 Materiel Electr Indl
GB8819904D0 (en) * 1988-08-22 1988-09-21 Amp Great Britain Crimping ferrule to insulation of insulated cable

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US2034090A (en) * 1934-05-25 1936-03-17 Harry A Douglas Wire terminal for electrical conductors
US2343522A (en) * 1943-10-23 1944-03-07 Burndy Engineering Co Inc Pin connection
US2557126A (en) * 1946-06-27 1951-06-19 Aircraft Marine Prod Inc Electrical connector
US2697213A (en) * 1952-05-31 1954-12-14 Patton Macguyer Co Solderless electric terminal
US2729695A (en) * 1951-04-27 1956-01-03 Aircraft Marine Prod Inc Electrical connectors
US2783447A (en) * 1956-03-15 1957-02-26 Aircraft Marine Prod Inc Electrical connector
US2789277A (en) * 1953-02-03 1957-04-16 Amp Inc Electrical connection and method
US2818632A (en) * 1952-09-24 1958-01-07 Amp Inc Electrical connection and method

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2034090A (en) * 1934-05-25 1936-03-17 Harry A Douglas Wire terminal for electrical conductors
US2343522A (en) * 1943-10-23 1944-03-07 Burndy Engineering Co Inc Pin connection
US2557126A (en) * 1946-06-27 1951-06-19 Aircraft Marine Prod Inc Electrical connector
US2729695A (en) * 1951-04-27 1956-01-03 Aircraft Marine Prod Inc Electrical connectors
US2697213A (en) * 1952-05-31 1954-12-14 Patton Macguyer Co Solderless electric terminal
US2818632A (en) * 1952-09-24 1958-01-07 Amp Inc Electrical connection and method
US2789277A (en) * 1953-02-03 1957-04-16 Amp Inc Electrical connection and method
US2783447A (en) * 1956-03-15 1957-02-26 Aircraft Marine Prod Inc Electrical connector

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3227993A (en) * 1960-10-24 1966-01-04 Microdot Inc Electrical connector
US3320574A (en) * 1963-02-04 1967-05-16 Tuchel Ulrich Two-piece connector
US3420087A (en) * 1963-02-18 1969-01-07 Amp Inc Electrical connector means and method of manufacture
US3312930A (en) * 1965-02-10 1967-04-04 Amp Inc Terminal pin assembly
US3517981A (en) * 1966-06-15 1970-06-30 Amp Inc Termination members for fiber optic means
US3696322A (en) * 1970-06-01 1972-10-03 Itt Insulated flat wire terminal
US4015891A (en) * 1974-05-01 1977-04-05 Rist's Wires & Cables Limited Electrical connector
US4330168A (en) * 1979-06-28 1982-05-18 International Telephone And Telegraph Corporation Electrical contact and method of making same
US4269472A (en) * 1979-10-26 1981-05-26 Amp Incorporated Electrical terminal
DE19737863A1 (de) * 1997-08-29 1999-03-04 Whitaker Corp Elektrischer Verbinder, Verfahren zur Herstellung eines Isolationscrimpes und Vorrichtung zur Durchführung des Verfahrens
US6098443A (en) * 1997-08-29 2000-08-08 The Whitaker Corporation Device for producing an insulation crimp on an electrical connector
DE19737863B4 (de) * 1997-08-29 2015-07-16 The Whitaker Corp. Elektrischer Verbinder und Verfahren zur Herstellung eines Isolationscrimpes
US20090275247A1 (en) * 2008-05-03 2009-11-05 Michael Richter Contact for a connection box
US7819709B2 (en) 2008-05-03 2010-10-26 Lumberg Connect Gmbh Contact for a connection box

Also Published As

Publication number Publication date
FR1197355A (fr) 1959-11-30
NL228724A (en(2012)) 1900-01-01
GB852563A (en) 1960-10-26
NL106565C (en(2012)) 1900-01-01
DE1825840U (de) 1961-02-02
CH363391A (de) 1962-07-31

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