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Publication numberUS2921287 A
Publication typeGrant
Publication dateJan 12, 1960
Filing dateJan 18, 1957
Priority dateJan 18, 1957
Also published asDE1122603B
Publication numberUS 2921287 A, US 2921287A, US-A-2921287, US2921287 A, US2921287A
InventorsAnderson James D, Matthysse Irving F
Original AssigneeBurndy Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Snap fit interlocking connector
US 2921287 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

Jan. 12, 1960 I. F. MATTHYSSE ETAL 2,921,287

SNAP FIT INTERLOCKING CONNECTOR Filed Jan. 18, 1957 I N VEN TOES ZkJ/NG EMA 1' m ysss BY JMs D. ANDERSON 2,921,287 SNAP FIT MERLOCKI-NG CONNECTOR Application January 18, 1957, Serial No. 635,009

1 Claim. (Cl. 339-258) Our invention relates to interlocking connectors, and more particularly to plug and socket connectors which permit the parts to snap fit together in a self-adjusting type of gripping connection. Such connectors resist separation until a tensile force of predetermined value is exerted.

It is a primary object of our invention to provide a socket type connector which will adequately maintain the connection even though one or more of the gripping elements fail in operation.

Other objects are to provide a socket connector with gripping elements which possess exceptional ability to adjust to variations in dimensions of the plug connector; to provide a connector with greater contact area with the plug connector; to provide a socket connector with less resistance to entrance of the plug connector without loss of total gripping power; to provide a socket connector with proportionally less movement of the gripping elements under the action of the plug connector with consequent less permanent deformation; to provide a socket connector with gripping elements which possess a better controlled spring grip of the plug connector; and to provide the foregoing objects in a connector which is not more diflicult to produce than previous types of socket connectors, and at no more cost.

We accomplish these and other objects and obtain our new results as will be apparent from the device described in the following specification, particularly pointed out in the claim, and illustrated in the accompanying drawing, in which:

Fig. 1 is a plan view of our socket connector.

Fig. 2 is an end elevation of the same.

Fig. 3 is an enlarged longitudinal sectioned view taken in the plane 3-3 of Fig. l, with the plug connector partially inserted therein.

Fig. 4 is a similar view with the plug connector fully inserted.

Fig. 5 is a sectional view taken in the plane 5-5 of Fig. 4.

Fig. 6 is a longitudinal sectioned view of the socket of a modified form of connector.

The socket connector 10 comprises a body back portion 12 from which two curled fingers 14 and 14a extend on each side of the body to form four socket receiving clasps. The body, in addition, is provided preferably with conductor gripping fingers 16, and insulation gripping fingers 18 for electrically and mechanically securing the insulated wire 19 thereto.

The plug connector 20, provided with plug 22, is inserted into the socket connector 10, as shown in Fig. 3. Such plug connector is preferably provided with a dimple 24 on both sides of the plug 22 to permit the plug to be used from either side. An upset portion is formed by coining, through the bottom of the back section 12, to provide a ramp detent 26 which snaps into dimple 24 when in proper position.

To provide greater resistance to longitudinal bending,

the side. (walls 27 may obviously be provided on the edges 0f the body portion 12. The side walls may extend between the fingers,. as at 29, to control the flexibility-of the fingers.

v The metal ofthe socket connector may be of brass in the 3/4 hard range, or copper of a similar hardness, which will provide sufficient spring in the fingers to accommodate the plug 22 and grip it adequately.

The use of two sets of oppositely positioned pairs of fingers permits individual adjustment to the plug 22 when inserted therein. For example, in Fig. 3, the rear fingers 14a have adjusted themselves to the tapered end 28 of the plug, and are tilted at a different angle than are the front fingers 14. The front bottom portions 30 of each pair of fingers are preferably charnfered as at 32 to facilitate the plug entrance thereunder.

Thus, as the plug is inserted under the leading fingers, the initial entry is eased. The fingers are sprung slightly upward since the clearance between their lower surfaces 30 and the upper surface of back 12 is less than the thickness of the plug.

As the plug is further inserted into the socket, it is cammed upwardly as it rides over the detent 26. The leading and rear fingers accordingly, individually adjust themselves until the detent is seated with an audible snap into the dimple, and the plug is properly seated.

The rear or underside of the back portion 12 may be recessed or concaved as at 34 during the forming operation, to form a stronger and more resilient socket for the plug connection.

The use of separate leading and rear fingers on each side of the socket connector permits proportionately less movement as is apparent by the dot-dash line AA in Fig. 3, which would be the position of the fingers if both leading and back fingers were in one piece.

The ability of each finger to individually adjust to contour irregularities, enables more conducting contact area to be provided.

Manufacturing variations of both plug and socket connections are not nearly so harmful, since the individual fingers can be positioned lower to accommodate the undersized limits without exerting an excessive resisting force to the insertion of the plug with oversized dimensional units.

In Fig. 6 we disclose a modification of our socket connector in which the leading clasp fingers 114 are connected at the free ends thereof to the rearwardly positioned clasp fingers 114a by means of the integrally formed band 114]). The function of the integral band 11412 is to assist the plug connector 20 in passing from the leading to the rearwardly positioned clasp fingers without the necessity of camming under the rearwardly positioned fingers. Thus a smoother operation is provided when the plug is inserted into the socket connector. The independent action of the fingers is thereby controlled to any desired degree. The connecting integral band prevents the possibility of the rearwardly positioned fingers from becoming accidentally jammed in the operation of the device.

We have thus described our invention, but we desire it understood that it is not confined to the particular forms or uses 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 our invention, and, therefore, we claim broadly the right to employ all equivalent instrumentalities coming within the scope of the appended claim, and by means of which, objects of our invention are attained and new results accomplished, as it is obvious that the particular embodiments herein shown and described are only some 3 4 r of the many that can be employed to attain these objects fingers on the same side operating independently of the and accomplish these results. other fingers within the limits imposed upon them by We claim: reason of the integrally connected thin band of metal. A socketconnector for use with a plug type connector, said connector comprising a base, a pair of leading clasp 5 References Cited in the file of this patent fin ers, and a pair of rearwardl ositioned clas fin ers eac h of said pair of fingers beirfg iforrned integrflly \iith UNITED STATES PATENTS said base, the free ends of each of the fingers on the 2,763,848 Tuchel Sept. 18, 1956 same side of the connector being integrally connected 2,774,951 Kinkaid et a1. Dec. 18, 1956 to each other by a thin band of metal, each of said 10 2,789,278 Soreng Apr. 16, 1957

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2763848 *Dec 17, 1954Sep 18, 1956Ulrich TuchelCouplings for electric conductors
US2774951 *Dec 16, 1954Dec 18, 1956Aircraft Marine Prod IncTerminal clip
US2789278 *May 1, 1953Apr 16, 1957Controls CompanyElectrical connection and method of making the same
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3065451 *Jul 26, 1960Nov 20, 1962Patton Macguyer CoMale-female connector
US3086193 *Dec 8, 1960Apr 16, 1963Quentin BergElectrical connector
US3155450 *Oct 30, 1961Nov 3, 1964Positive Connector CoElectrical contact receptacle
US3160459 *Feb 17, 1961Dec 8, 1964Burndy CorpConnector for printed circuit boards
US3163484 *Dec 27, 1960Dec 29, 1964Philips CorpElectric terminal
US3183471 *Feb 8, 1963May 11, 1965Thomas & Betts CorpElectrical terminal and connection
US3210721 *Mar 5, 1963Oct 5, 1965Amp IncElectrical connector
US3222633 *Nov 8, 1962Dec 7, 1965Products Inc VanConnector clip
US5181866 *Apr 3, 1991Jan 26, 1993Heyco Stamped Products, Inc.High retention low insertion force electric female disconnect
US5581225 *Apr 20, 1995Dec 3, 1996Littelfuse, Inc.One-piece female blade fuse with housing
US5668521 *Mar 22, 1995Sep 16, 1997Littelfuse, Inc.Three piece female blade fuse assembly having fuse link terminal with a clip receiving portion
US5733154 *Mar 8, 1996Mar 31, 1998Berg Technology, Inc.Connector element for connecting a flexfoil and a pin-like contact member and a related connected tool and method
US5886612 *Oct 20, 1997Mar 23, 1999Littelfuse, Inc.Female fuse housing
US5929740 *Oct 20, 1997Jul 27, 1999Littelfuse, Inc.One-piece female blade fuse with housing and improvements thereof
US5997366 *Feb 9, 1998Dec 7, 1999Berg Technology, Inc.Method for connecting a flexfoil and a pin-like contact member
US6240629Feb 9, 1998Jun 5, 2001Berg Technology, Inc.Tool for connecting a flexfoil and a pin-line contact member
US7104849 *May 24, 2005Sep 12, 2006Sumitomo Wiring Systems, Ltd.Terminal and a method of forming it
US7595715 *Sep 27, 2007Sep 29, 2009Lear CorporationHigh power case fuse
US7760056 *Nov 20, 2007Jul 20, 2010Denso CorporationElectromagnetic switch for use in starter
US7892050Jun 10, 2010Feb 22, 2011Lear CorporationHigh power fuse terminal with scalability
US8339235Aug 6, 2008Dec 25, 2012Beckert James JHousing securing apparatus for electrical components, especially fuses
US8366497Dec 9, 2010Feb 5, 2013Lear CorporationPower terminal
US8951051Oct 10, 2011Feb 10, 2015Lear CorporationConnector having optimized tip
US9142902Jul 31, 2014Sep 22, 2015Lear CorporationElectrical terminal assembly
US20050260897 *May 24, 2005Nov 24, 2005Sumitomo Wiring Systems, Ltd.Terminal and a method of forming it
DE1515388B *Jun 28, 1962Feb 12, 1970Amp IncElektrische Klemmvorrichtung
DE9416055U1 *Oct 6, 1994Feb 1, 1996Stocko Metallwarenfab HenkelsFlachsteckhülse mit Schneidkontakt
U.S. Classification439/849
International ClassificationH01R13/115
Cooperative ClassificationH01R13/115
European ClassificationH01R13/115