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Publication numberUS3019284 A
Publication typeGrant
Publication dateJan 30, 1962
Filing dateDec 29, 1959
Priority dateDec 29, 1959
Publication numberUS 3019284 A, US 3019284A, US-A-3019284, US3019284 A, US3019284A
InventorsMatthysse Irving F
Original AssigneeBurndy Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Gripping cup to retain a conductor in a connector
US 3019284 A
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Description  (OCR text may contain errors)

Jan. 30, 1962 1. F. MATTHYSSE 3,019,284 GRIPPING CUP TO RETAIN A CONDUCTOR IN A CONNECTOR Filed Dec. 29, 1959 I IN VEN TOR. few/v; E 47V'HYSSE United States Patent Ofiice 3,019,284 Patented Jan. 30,1962

This invention relatesto connectors having tubular I bodies that may be. used tozgsplice wires .or cables, and more particularly to electrical connectors .of the type. that are indented andlockedto the wire.

These connectors generally comprise a malleablemetal tube into each end of which is disposed a wire end to be connected. After the wire is disposed in the tube, a crimping tool is applied to the assembly to compress the connector into the wire, locking the wire therein.

A difiiculty often arises in retaining the wire in the connector before and during the crimping operation. This may occur when the crimping is made by a tool which requires two hands in its operation. A third hand to hold the wire, while desirable, is frequently not available. Similarly, a crimp may be made at a distance from the operator by means of a long handled tool, which will not permit him to concurrently hold the wire in the connector.

Thus, a need arises for a means which will retain the wire or Wires in a connector independently of the operator. It is desirable that both bare and insulated wires be capable of being retained, and that a wide range of conductor and/or insulation sizes be accommodated.

An object of this invention is to provide a means for retaining a wire in a connector, especially before and during a crimping operation.

Another object is to provide a means for retaining wires of different diameters within a tubular connector.

A feature of the invention is a radially slotted closure or cup which will grasp and retain the wire in the connector during crimping.

Another feature of the invention is the provision in a radially slotted closure or cup of tabs of varying lengths which will grasp and retain wires of different diameters.

These and other objects and features of this invention will become more apparent by reference to the following description taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a plan view of the gripping cup of one embodiment of this invention; 1

FIG. 2 is a plan view of the gripping cup of another embodiment of this invention; f

FIG. 3 is an elevation in cross-section taken along lines 3-3 of FIG. 1;

The;sm ooth. edges 17 of the tabs of FIG. 1 may be d: o-sra ai sul t qm A. jagged edge, as at 218, is provided in the gripping cup-201 illustrated in FIG. 2 to grasp bare wire.

Thegripping cup may be formed with a side wall 20 da s andi lip 2.

Theinsulated connector shown in FIG. 4. consists of a malleable, metal; barrel 401having a wire stop 402 and a circumferential; groove 403.; The wire stop serves to limitthe depth of insertion of thewire into the connector.

, External and coaxial with the barrelis a dielectric sleeve FIG. 4 is a cross-sectional view of an insulated connector including a gripping cup of this invention; and

FIG. 5 is a cross-sectional view of an uninsulated connector including a gripping cup of this invention.

In the drawings, reference character 1 designates generally the gripping cup of this invention which has a series of slits, as at 2, 3, 4, 5, 6, and 7 radiating from a center hole 8. The center hole is of irregular shape having radii of various lengths, as at 9 and 10, producing a series of tabs 11, 12, 13, 14, 15, and 16 of different lengths. In the cup, illustrated in FIG. 1, two groups of tabs are shown; 11, 13, and 15 being longer than 12, 14, and 16. The ends of the tabs, as at 17, may be arcuate or straight. When a wire is disposed through the gripping cup, as will be hereinafter described, tabs 12, 1

14, and 16 grasp wires of relatively small diameters, while 7 tabs 11, 12, and 13 grasp and retain wires of'relatively large diameters.

404 which extends beyond. the, barrel -as at 405; An internal bead 406'is molded integral with the sleeve which is accommodated by the groove 403 and serves to align and interlock the barrel and sleeve. A bead 407 may be molded on the sleeve exterior, to interlock with a groove 408 which is molded into the interior of an end cap 409 having an orifice 410 through which a wire may be disposed. The gripping cup 1 is inserted in the connector between the sleeve and the end cap as shown so that the lip 21 is captured between the end of sleeve 404 and the cap 409 and is held in place.

When a wire 410 is disposed through the end cap and gripping cup, the tabs are deformed and dig into the insulation (411), preventing subsequent pulling out of the wire. Any tendency of the wire to pull out causes the tabs to dig in deeper' The gripping cup will retain the wire provided that a set of tabs is depressed at an angle to the wire and digs into the wires to some extent. If the tabs are bent so far as to be substantially parallel to the surface of the wires and do not dig into them, the wires will not be retained. Providing tabs of diflerent lengths affords at least one set of tabs to be bent to a suitable angle to adequately grasp the wire when dealing with a range of wire sizes. After the wire has been inserted into the connector, the connector is crimped through the sleeve and barrel to the wire, as at 412, 413, and 414 by means of a crimping tool.

Thus, the operator need only dispose the wire into the connector where it will be retained by the gripping cup, permitting the operator to utilize his two available hands to operate the crimping tool.

A noninsulated connector is illustrated in FIG. 5 which consists of a malleable metal barrel 501 having a wire stop 502. A gripping cup 201, preferably of the type illustrated in FIG. 2, is disposed in each end of the barrel, and fastened by any suitable means, such as staking. When the wire 503 isdisposed into the barrel 501, the tabs of the gripping cup are bent and the jagged edges tend to dig into the wire. Any tendency of the wire to pull out of the connector causes the teeth of the tabs to. dig even deeper into the wire. The assembly of the connector is similar to that described previously.

The gripping cup may be formed by any convenient method, such as stamping, out of any material having some spring-like characteristics, suchas, sheet metal. The edge of the tab may be made harder than the wire or insulation into which it is to dig.

The invention has thus been described, but it is desired to be understood that it is not confined to the particular forms or usages shown and described. The same being merely illustrative, and that the invention may be carried out in other ways without departing from the spirit of the invention, and therefore, the right is broadly claimed to employ all equivalent instrumentalities coming within the scope 'of the appendant claims and by means of which objects of this invention are attained and new resultsaccomplished, as it is obvious that the particular embodiments herein shown and described are only some of the many that can be employed to obtain these objects 7 and accomplish these results. 7 3

3 I claim: 1. A connector comprising: a malleable metal barrel; a dielectric sleeve external and coaxial therewith and having ends thereof extending beyond the ends of said barrel; an end cap disposed on each end of said sleeve; a tubular insert disposed in at least one of the portions of said sleeve which extends beyond said barrel end; said insert having an end remote from said barrel end which includes an upstanding lip, said lip being disposed between the end of said sleeve and said cap; said insert having an end proximal to said barrel end which includes a radially slit closure which includes a center hole from which slits radiate to form resilient tabs in said closure; said tabs being adapted to grip and retain a conductor thrust freely into said barrel.

2. A connector according to claim 1, wherein the free ends of said tabs are formed with a jagged edge.

3. A connector according to claim 1, wherein said center hole is formed of difierent radii, whereby said tabs are given different lengths.'

References Cited in the file of this patent UNITED STATES PATENTS OTHER REFERENCES Insulink, published in Electric Light and Power, June 15, 1959, page 23.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1568585 *Sep 11, 1924Jan 5, 1926Brune Sr Louis JElectric wire connecter
US1984540 *Feb 2, 1933Dec 18, 1934Axel NelsonConnecter
US2264480 *Feb 28, 1938Dec 2, 1941Frank M OwenGripping device
US2316267 *Mar 23, 1942Apr 13, 1943Int Standard Electric CorpSleeve connector
US2870239 *Feb 14, 1955Jan 20, 1959Buchanan Electrical Prod CorpElectrical connector
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3165575 *Oct 4, 1962Jan 12, 1965Thomas & Betts CorpInsulated splicer with end seals
US3183025 *May 16, 1963May 11, 1965Thomas & Betts CorpConnector with temporary cable holding means
US3210719 *Apr 12, 1963Oct 5, 1965Amp IncElectrical connector
US3254322 *Sep 18, 1963May 31, 1966Amp IncElectrical connector
US3317887 *Dec 16, 1964May 2, 1967Amp IncContact socket
US3385939 *Jan 9, 1968May 28, 1968Chase Shawmut CoElectric fuse adapted to be conductively connected to a cable
US3477749 *Jun 13, 1968Nov 11, 1969Cabot CorpPipe fitting having mechanical fastener for connecting the fitting to a pipe
US3525799 *May 17, 1968Aug 25, 1970Raychem CorpHeat recoverable connector
US3875326 *Feb 12, 1973Apr 1, 1975Fischer Ag GeorgExplosively operated welding cartridge
US3976314 *Jan 3, 1975Aug 24, 1976Paul M. HankisonTube coupler
US4021062 *Feb 19, 1975May 3, 1977Automatisation-SogemoCoupling assemblies
US4440424 *Jun 2, 1978Apr 3, 1984Nycoil CorporationReleasable coupling device
US4751350 *Nov 6, 1986Jun 14, 1988Raychem CorporationSealing device and retention member therefor
US4762501 *Sep 8, 1986Aug 9, 1988Amerace CorporationExtended contact
US4953898 *Mar 29, 1989Sep 4, 1990Hubbell IncorporatedMechanical fastener for plastic conduits
US5039141 *Sep 6, 1988Aug 13, 1991Parker Hannifin Rak S.A.Annular catch for rapid connection of flexible or rigid tube
US6359226 *Apr 21, 1998Mar 19, 2002Tyco Electronics CorporationDevice and method for protecting and sealing exposed wires
US20100200261 *Sep 2, 2008Aug 12, 2010MecatractionTerminal for electrical connection and method for assembly thereof
DE102007030134B3 *Jun 29, 2007Oct 2, 2008Rahnenführer, DirkConductor pin and socket connector for electrically connecting two electrical conductors, has V-shaped or circular arc-shaped conductor rail arranged on housing and inserted into ring, where rail is electrically connected with grooves
DE102008019971B3 *Apr 21, 2008Jul 16, 2009Rahnenführer, DirkWire plug-in connector, has spring rings formed with inward pointing spring lamella and with V-shaped or circle-arc-shaped bus bar, where bus bar is inserted in spring rings and electrically interconnects insertion channels
EP0267045A2 *Nov 6, 1987May 11, 1988RAYCHEM CORPORATION (a California corporation)A closure and a retention member for use therewith
Classifications
U.S. Classification174/84.00C, 403/377, 174/90, 285/340, 29/517, 439/877
International ClassificationH01R4/20, H01R4/10
Cooperative ClassificationH01R4/20
European ClassificationH01R4/20