Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS1706005 A
Publication typeGrant
Publication dateMar 19, 1929
Filing dateJan 26, 1922
Priority dateJan 26, 1922
Publication numberUS 1706005 A, US 1706005A, US-A-1706005, US1706005 A, US1706005A
InventorsThompson Walter V
Original AssigneeWestern Electric Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Method of making cord tips
US 1706005 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

March 19, 1929. w v, THOMPSON 1,706,0Q5

METHOD OF MAKING CORD TIPS Filed Jan. 26, 1922 Patented Mar. 19, 1929.




Applicationfiled January 26, 1922. Serial No. 531,842.

This invention relates to electrical connectors and a method for applying said connectors to insulated wires to form terminals thereon.

The object of the invention is to provide a connector for electrical wires which may be securely attached without scraping the insulation from the wires and without the use of solder to secure it to the conductor.

The invention provides a connector having spike members which may be pressed through the insulation of a conductor thereby making contact with the metal strands therein and a body portion which may be simultaneously bent or wrapped about the insulated conductor for securely attaching the cord tip thereon.

In making electrical connections in large numbers as is done, for example, in telephone exchanges, it is important to provide connectors or cord tips which will insure a perfect connection and which will give lasting service. It has heretofore been the practice to cut the insulated conductor wire to the proper length, to cut or scrape the insulation from the end of the conductor, to wrap strands of thin wire about the end'of the conductor, to solder thereto the conducting portion of the connector and to bend the body portion of the connector about the end of the insulated wire to securely fasten the same thereto.' This process is not only tedious, but expensive owing to the numerous operations involved. The present invention provides a connector and a. method of attaching it to an insulated conductor which performs substantially simultaneously the steps of securing the connector to the conductor, making an electrical connection between the cord tip and the conductor and cutting the conduct-or to the proper length.

In the drawings, disclosed Fig. 1 is an enlarged view of a connector which embodies the invention in its preferred form. Fig. 2

' shows the improved connector attached to an insulated conductor. Fig. 3 is an enlarged cross sectional View showing the projections of the connector piercing the insulation and contacting with the stranded conductors therein. Fig. 4 is a partial end elevation of a punch press which may be used for performing the steps of my improved method. Fig.

the apparatus with the invention comprises a metal punching which is provided with a connecting arm 1 having a U -shaped contacting tip 2. A body or shank portion 3 of the improved connector is provided with ears or wings 4 on either side thereof which may be crimped or bent around the insulated wire to which the connector is to beapplied. Two sides of triangularly shaped holes are cut in the shank portion 3 and the cut portions punched through to form sharp pointed projections 5 of metal which project at right angles to the surface of the shank.

Fig. 2 shows the improved connector applied to an insulated wire which comprises a series of strands 6, an insulating coating of rubber 7 and a braided wrapping of fibrous material 8. In applying the connector to the conductor, the projections 5 are forced through the braided wrapping 8 and the insulating coating of rubber 7 into the stranded conductor wires 6 (Fig. 3), the ears or wings 4 of the shank portion being crimped or wrapped around the outside of the conductor to secure the connector to the conductor and to hold the projections 5 in engagement with the stranded conductors 6. The conductor is then cut at that end of the body or shank por tion 3 adjacent the connecting arm 1, to leave the arm entirely exposed as is shown in Fig. 2.

Figs. 4 and 5 illustrate an apparatus which may be employed to perform my improved method of attaching to insulated conductors a connector made in accordance with my invention, which method consists in forcing projections on the connector through the insulation of the conductor thereby establishing electrical connection between the strands within the conductor and the connector, crimping the body portion of the connector on the conductor to hold the connector thereon and cutting the conductor to the proper length so as to expose the contactingarm of the connector: The illustrated means for performing these operations consists of a punch press provided with a grooved stationary die 9 into which the conductor and connector are pIaced, a cylindrical lug or stop 10 being provided for determining the position of the connector and the conductor on the stationary die 9. A reciprocating die 11 cooperating with die 9 is provided with a V-shaped groove 12 which registers with groove 13 in stationary die 9 so that, in its downward movement the sides of the groovedreciprocating die engage the upturned wings 4 of the connector seated in groove 13 of stationary die 9, and crimps them around the insulated conductor. Reciprocating die 11 is also provided with a chisel blade 14: having a knife edge 15 which in its downward movement cuts the insulated conductor to the proper length exposing the contacting arm 1 of the connector.

From the above, it will be seen that the piercing,crimpingandcuttingoperationsmay be accomplished substantially simultaneously. The means for doing this however is not to be understood as being limited to that shown in the disclosure which merely illustrates one apparatus with which the improved method may be performed.

lVhat is claimed is:

The method of making a cord tip for telephone cords which consists in laying an insulated conductor in a channel formed in a sheet metal blank having a projecting terminal,

substantially simultaneously forcing the sidesof the channel around said insulated conduct-or to form a jacket to hold it firmly, cutting the insulated conductor where it emerges from the jacket, and making a permanent electrical connection between said conductor and tip by forcing sharp projections on the jacket through the insulation and into contact with the conductor.

In Witness whereof, I hereunto subscribe my name this 24th day of January A. D., 1922.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2501870 *Nov 24, 1945Mar 28, 1950Western Electric CoTerminal for electrical conductors
US2515105 *Aug 8, 1947Jul 11, 1950Allied Electric Products IncMethod of making an electrical connection to an insulated wire
US2550578 *May 29, 1946Apr 24, 1951North Electric Mfg CompanyRelay construction
US2551299 *Oct 6, 1943May 1, 1951Aircraft Marine Prod IncElectrical connector and method of making the same
US2557126 *Jun 27, 1946Jun 19, 1951Aircraft Marine Prod IncElectrical connector
US2574608 *Aug 13, 1947Nov 13, 1951Ziph Andrew HElectrical junction box connector
US2630468 *Apr 30, 1951Mar 3, 1953Maxwell H LewisTerminal connector for electrical conductors
US2663139 *Oct 31, 1949Dec 22, 1953Gibbs Mfg And Res CorpPallet lever construction
US2668950 *Apr 9, 1951Feb 16, 1954Western Electric CoApparatus for applying terminals to electrical conductor wires
US2680235 *Sep 16, 1949Jun 1, 1954Aircraft Marine Prod IncElectrical connector
US2688133 *Dec 29, 1950Sep 7, 1954Aircraft Marine Prod IncApplicator for connectors and the like
US2692422 *Mar 10, 1948Oct 26, 1954Aircraft Marine Prod IncMethod of applying connectors
US2704358 *Oct 24, 1947Mar 15, 1955Aircraft Marine Prod IncElectrical connection and method
US2768378 *Apr 14, 1951Oct 30, 1956Nicholas ZwickMachines for attaching terminals to cords or the like
US2783442 *Aug 3, 1953Feb 26, 1957Thomas & Betts CorpMethod of and apparatus for forming electric terminals
US2786263 *Jan 7, 1953Mar 26, 1957Nat Products CorpApparatus for assembling sheathed cable connectors
US2789278 *May 1, 1953Apr 16, 1957Controls CompanyElectrical connection and method of making the same
US2798895 *Jun 18, 1954Jul 9, 1957Ray O Vac CoPoint contact battery
US2802194 *Oct 28, 1954Aug 6, 1957Gen Motors CorpTerminal
US2818632 *Sep 24, 1952Jan 7, 1958Amp IncElectrical connection and method
US2869100 *Nov 23, 1956Jan 13, 1959Mayfair Molded Products CorpAnode connector
US2880259 *Jun 18, 1954Mar 31, 1959Electric Storage Battery CoPrimary battery
US2927150 *Dec 20, 1955Mar 1, 1960Aircraft Marine Prod IncInsulation piercing crimp
US3162501 *Jan 21, 1960Dec 22, 1964Amp IncElectrical connector
US4018499 *Jan 15, 1976Apr 19, 1977Amp IncorporatedContact for insulated wire
US4136922 *Aug 15, 1977Jan 30, 1979Essex International, Inc.Ignition cable terminals
US5207596 *Mar 19, 1992May 4, 1993Tandy CorporationSolderless coaxial wire connector and method for attachment
US5480325 *May 27, 1994Jan 2, 1996Tandy CorporationCoaxial connector plug and method for assembly
US6206727 *Nov 19, 1999Mar 27, 2001Sumitomo Wiring Systems, Ltd.Terminal and crimping method
US7591666Nov 10, 2006Sep 22, 2009Zierick Manufacturing CorporationSurface mount crimp terminal and method of crimping an insulated conductor therein
US20080113553 *Nov 10, 2006May 15, 2008Janos LegradySurface mount crimp terminal and method of crimping an insulated conductor therein
US20090117774 *Nov 3, 2008May 7, 2009Janos LegradySurface mount crimp terminal and method of crimping an insulated conductor therein
DE102004049575A1 *Oct 12, 2004Apr 20, 2006Sick AgElectrical terminal for connecting conductor cable to PCB, has terminal unit provided for pressing in conductor cable for electrical link of conductor cable, where terminal unit is designed as spike
EP1921713A1Oct 9, 2007May 14, 2008Zierick Manufacturing CorporationInsulation displacement connector assembly and system adapted for surface mounting on printed circuitboard and method of using the same
WO2008060806A2 *Oct 18, 2007May 22, 2008Zierick Manufacturing Corp.Surface mount crimp terminal and method of crimping an insulated conductor therein
U.S. Classification29/866, 439/425, 439/424
International ClassificationH01R43/058, H01R43/04
Cooperative ClassificationH01R43/058
European ClassificationH01R43/058