US3605072A - Solderless wire connector - Google Patents

Solderless wire connector Download PDF

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Publication number
US3605072A
US3605072A US803235*A US3605072DA US3605072A US 3605072 A US3605072 A US 3605072A US 3605072D A US3605072D A US 3605072DA US 3605072 A US3605072 A US 3605072A
Authority
US
United States
Prior art keywords
wire
legs
contact member
receiving slot
connector
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
US803235*A
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English (en)
Inventor
Aelred Daniel Driscoll
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
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 Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Application granted granted Critical
Publication of US3605072A publication Critical patent/US3605072A/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
    • H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
    • H01R4/2416—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type
    • H01R4/242—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type the contact members being plates having a single slot
    • H01R4/2425—Flat plates, e.g. multi-layered flat plates
    • H01R4/2429—Flat plates, e.g. multi-layered flat plates mounted in an insulating base

Definitions

  • a solderless wire connector comprising a thin resilient flat plate contact element with parallel extended legs fitting into a grooved wire-supporting base and defining openended wire-receiving slots, wherein said legs are internally perforated to provide stress relief along wire-contacting edges.
  • the contact element consists essentially of a thin resilient flat metal plate having parallel extended legs defining open-ended wire-receiving slots.
  • Connectors of this type have previously been described, for example in Levin et al. U.S. Pat. No. 3,012,219 and in Elm U.S. Pat. Nos. 3,258,733 and 3,388,370. They provide excellent electrical contact with insulated wires of appropriate diameter but require surprisingly high application forces, particularly for larger wire sizes or for simultaneous connection to a number of wires.
  • the present invention makes possible a significant reduction in the force required for insertion of the wires, and at the same time improves the wire-retaining ability of connectors of the type described. As a result, connection to wires of relatively large diameter, or to flat cables containing many parallel smaller wires, is facilitated. Connectors made in accordance with the invention are found to be particularly effective on aluminum wires, which normally tend to undergo cold flow deformation under continued severe stress.
  • FIG. 1 is a front elevation
  • FIG. 2 a side elevation, of a portion of a connector shown partly in section and as applied to two insulated wires
  • FIGS. 3-5 are front elevations showing alternative contact member configurations.
  • the connector of FIGS. 1 and 2 will be seen to comprise a base 11 and a contact element 12 having narrow outer legs 19, 20 and a wider centrally perforated central leg 21.
  • Wires 13, consisting of copper conductor 14 and insulating covering 15, are supported on wire-supporting surfaces 16 of the base 11 and lie across a narrow groove 18 designed to receive the element 12, the wires being supported in alignment with the open-ended slots defined by adjacent legs of the contact element.
  • Forcing the element 12 into the grooved base forces the wires into the slots and causes resilient spreading of the outer legs 19, 20.
  • the slot-defining edges of the legs displace the insulation and make electrically conductive contact with the wire 14.
  • the width of the inner leg is greater than that of the outer legs in these contact elements to provide space for the thickness of insulation on the wires.
  • the central leg 21 of contact member 12 is longitudinally perforated at perforation 24, as shown in FIG. 1, leaving two narrow terminally interconnected edge strips 22, 23. Under the forces imparted on entry of the wire 14, these strips are resiliently bowed inwardly, thereby decreasing the force required to make the connection and at the same time providing a more secure grip on the wire than would be possible without the stress-relief opening.
  • FIG. 3 illustrates an alternative contact element 32 wherein the outer legs 29, 30 as well as the inner leg 31 are perforated, thereby still further reducing the force required to effect the contact and also further improving the angle of contact.
  • the elongated contact element42 of FIG. 4 is capable of making effective contact with more than one wire in each open-ended slot.
  • the narrow edge strips of the several legs of the element maintain substantially equal pressure against each of the wires inserted, so that good contact is provided with each wire.
  • FIG. 5 illustrates another variation wherein the central leg 51 of the contact element 52 is provided with a generally diamond-shaped perforation whereas the outer legs 49, 50 each have a circular perforation in line with the widest portion of the diamond, thereby providing a centering action to position the wires between the legs of the contact element.
  • the contact element may have two, three, or any larger number of legs defining any desired number of wire-receiving open-ended slots, and with various specific configurations or combinations of perforations forming stress-relief openings in some or all of said legs.
  • the contact element 12 is made of 35 mil tin-plated spring-temper brass plate.
  • the overall dimensions are 0.4l5 0.365 inch.
  • the length of the center leg is 0.230 inch.
  • the stress-relief opening in the center leg is 0.062 inch wide and 0.217 inch long, the edge strips therefore being 0.038 inch in width.
  • the wire insertion force is reduced by about one-tenth, while the force required to remove the element from the wires is increased by about the same amount. After 2,000 cycles on a test rack, each cycle representing 45 minutes on voltage followed by connector is measurably less than that at the conventional connector.
  • a contact member for a solderless connector comprising a thin resilient flat plate having at least one pair of parallel extended legs defining an open-ended wire-receiving slot, at lest one of said legs having a perforation laterally spaced from the wire-receiving slot for partial relief of stress at the wire-contacting edge during forceful insertion of a wire into said wirereceiving slot.
  • the contact member of claim 1 having three extended legs defining two wire-receiving slots and wherein the central leg is perforated for stress relief.
  • each of said legs is perforated for stress relief.
  • a wire connector comprising the contact member of claim 1 cooperatively associated with a transversely grooved base having a wire-supporting surface, said contact member being disposed for entry of said legs into said groove and with said wire-receiving slot in line with said wire-supporting surface.

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)
  • Multi-Conductor Connections (AREA)
  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
US803235*A 1969-02-28 1969-02-28 Solderless wire connector Expired - Lifetime US3605072A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US80323569A 1969-02-28 1969-02-28

Publications (1)

Publication Number Publication Date
US3605072A true US3605072A (en) 1971-09-14

Family

ID=25185976

Family Applications (1)

Application Number Title Priority Date Filing Date
US803235*A Expired - Lifetime US3605072A (en) 1969-02-28 1969-02-28 Solderless wire connector

Country Status (7)

Country Link
US (1) US3605072A (ja)
JP (1) JPS4925154B1 (ja)
DE (1) DE2010436B2 (ja)
ES (1) ES376678A1 (ja)
FR (1) FR2032499A1 (ja)
GB (1) GB1298327A (ja)
SE (1) SE357284B (ja)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3703700A (en) * 1970-04-08 1972-11-21 Ericsson Telefon Ab L M Terminal block for slot connection of insulated conductors
US3748462A (en) * 1972-03-02 1973-07-24 Grote Mfg Co Combination vehicle lamp and junction box
US3869190A (en) * 1974-03-29 1975-03-04 Minnesota Mining & Mfg Solderless wire connector
US3950062A (en) * 1974-07-23 1976-04-13 Amp Incorporated Wire slot terminal double beam system
US3949467A (en) * 1974-08-05 1976-04-13 Minnesota Mining And Manufacturing Company Solderless electrical connector element application method and apparatus
US4037905A (en) * 1974-01-21 1977-07-26 Ideal Industries, Inc. No-strip electrical connector
US4085994A (en) * 1976-08-12 1978-04-25 Amp, Incorporated Dual slot contact
US4116522A (en) * 1976-07-09 1978-09-26 Amp Incorporated Slotted terminal
JPS53143084U (ja) * 1977-04-19 1978-11-11
US4452501A (en) * 1982-04-30 1984-06-05 General Motors Corporation Electrical connector with latch terminal
FR2580430A1 (fr) * 1985-02-18 1986-10-17 Caris Marcel Element de raccordement electrique
EP0248902A1 (en) * 1985-12-26 1987-12-16 Amp Inc CONNECTOR WITH OPTICAL FIBERS.
US4891018A (en) * 1988-06-16 1990-01-02 Minnesota Mining And Manufacturing Company Solderless electrical connector
US4954098A (en) * 1989-11-01 1990-09-04 Minnesota Mining And Manufacturing Company Sealed insulation displacement connector
US5080606A (en) * 1990-11-05 1992-01-14 Minnesota Mining And Manufacturing Company Stacked in-line insulation displacement connector
US5423694A (en) * 1993-04-12 1995-06-13 Raychem Corporation Telecommunications terminal block
US5557250A (en) * 1991-10-11 1996-09-17 Raychem Corporation Telecommunications terminal block
US5742223A (en) * 1995-12-07 1998-04-21 Raychem Corporation Laminar non-linear device with magnetically aligned particles
US6302723B1 (en) 1991-10-11 2001-10-16 Tyco Electronics Corporation Telecommunications terminal block
US20020198557A1 (en) * 2001-05-08 2002-12-26 Helmut Freigang Puncture cannula
DE102012101071A1 (de) * 2012-02-09 2013-08-14 Phoenix Contact Gmbh & Co. Kg Schneidklemmkontakt
US20130323988A1 (en) * 2012-05-31 2013-12-05 Omron Corporation Pressure welding terminal

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4508411A (en) * 1983-03-29 1985-04-02 Amp Incorporated Wire stuffing cover
DE4130603A1 (de) * 1991-09-11 1993-03-18 Wago Verwaltungs Gmbh Leitungshalter mit zugentlastung fuer isolierte elektr. rundleitungen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3027536A (en) * 1958-12-05 1962-03-27 Bell Telephone Labor Inc Insulation stripping wire connector
US3234498A (en) * 1963-06-04 1966-02-08 Western Electric Co Insulation-penetrating clip-type electrical connectors
US3258733A (en) * 1959-03-19 1966-06-28 Wire connector
US3403372A (en) * 1966-02-03 1968-09-24 Herman B. Stinson Jr. Method of making electrical connections and the connections produced thereby

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3027536A (en) * 1958-12-05 1962-03-27 Bell Telephone Labor Inc Insulation stripping wire connector
US3258733A (en) * 1959-03-19 1966-06-28 Wire connector
US3234498A (en) * 1963-06-04 1966-02-08 Western Electric Co Insulation-penetrating clip-type electrical connectors
US3403372A (en) * 1966-02-03 1968-09-24 Herman B. Stinson Jr. Method of making electrical connections and the connections produced thereby

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3703700A (en) * 1970-04-08 1972-11-21 Ericsson Telefon Ab L M Terminal block for slot connection of insulated conductors
US3748462A (en) * 1972-03-02 1973-07-24 Grote Mfg Co Combination vehicle lamp and junction box
US4037905A (en) * 1974-01-21 1977-07-26 Ideal Industries, Inc. No-strip electrical connector
US3869190A (en) * 1974-03-29 1975-03-04 Minnesota Mining & Mfg Solderless wire connector
US3950062A (en) * 1974-07-23 1976-04-13 Amp Incorporated Wire slot terminal double beam system
US3949467A (en) * 1974-08-05 1976-04-13 Minnesota Mining And Manufacturing Company Solderless electrical connector element application method and apparatus
US4116522A (en) * 1976-07-09 1978-09-26 Amp Incorporated Slotted terminal
US4085994A (en) * 1976-08-12 1978-04-25 Amp, Incorporated Dual slot contact
JPS53143084U (ja) * 1977-04-19 1978-11-11
US4452501A (en) * 1982-04-30 1984-06-05 General Motors Corporation Electrical connector with latch terminal
FR2580430A1 (fr) * 1985-02-18 1986-10-17 Caris Marcel Element de raccordement electrique
EP0248902A1 (en) * 1985-12-26 1987-12-16 Amp Inc CONNECTOR WITH OPTICAL FIBERS.
EP0248902A4 (en) * 1985-12-26 1990-02-05 Amp Inc CONNECTOR WITH OPTICAL FIBERS.
US4891018A (en) * 1988-06-16 1990-01-02 Minnesota Mining And Manufacturing Company Solderless electrical connector
US4954098A (en) * 1989-11-01 1990-09-04 Minnesota Mining And Manufacturing Company Sealed insulation displacement connector
US5080606A (en) * 1990-11-05 1992-01-14 Minnesota Mining And Manufacturing Company Stacked in-line insulation displacement connector
US6093050A (en) * 1991-10-11 2000-07-25 Baum; Thomas Matthew Telecommunications terminal block
US5557250A (en) * 1991-10-11 1996-09-17 Raychem Corporation Telecommunications terminal block
US6302723B1 (en) 1991-10-11 2001-10-16 Tyco Electronics Corporation Telecommunications terminal block
US5588869A (en) * 1993-04-12 1996-12-31 Raychem Corporation Telecommunications terminal block
US5423694A (en) * 1993-04-12 1995-06-13 Raychem Corporation Telecommunications terminal block
US5742223A (en) * 1995-12-07 1998-04-21 Raychem Corporation Laminar non-linear device with magnetically aligned particles
US20020198557A1 (en) * 2001-05-08 2002-12-26 Helmut Freigang Puncture cannula
US6730083B2 (en) * 2001-05-08 2004-05-04 B. Braun Melsungen Ag Puncture cannula
DE102012101071A1 (de) * 2012-02-09 2013-08-14 Phoenix Contact Gmbh & Co. Kg Schneidklemmkontakt
US20130323988A1 (en) * 2012-05-31 2013-12-05 Omron Corporation Pressure welding terminal
US9172152B2 (en) * 2012-05-31 2015-10-27 Omron Corporation Pressure welding terminal

Also Published As

Publication number Publication date
JPS4925154B1 (ja) 1974-06-27
DE2010436A1 (de) 1970-09-03
SE357284B (ja) 1973-06-18
FR2032499A1 (ja) 1970-11-27
DE2010436B2 (de) 1971-03-18
GB1298327A (en) 1972-11-29
ES376678A1 (es) 1972-09-16

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