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Publication numberUS1249711 A
Publication typeGrant
Publication dateDec 11, 1917
Filing dateDec 4, 1916
Priority dateDec 4, 1916
Publication numberUS 1249711 A, US 1249711A, US-A-1249711, US1249711 A, US1249711A
InventorsJohn Berg
Original AssigneeMetal Specialties Mfg Company
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Electric connector.
US 1249711 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)



APPucATlon FILED Dnc. 4. me.

1,249,71 l; Emma me. 11,1917.

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i Specifcationrof' Letters-Patent.

ratentea nee. il, reir.

Application filed December 4, 1916. Serial No. 134,982.

To all whom t may concern:

device7 such as an electric lamp, orV other electric device. 'Ihe primary object of the invention 1s to provide an electric connector of improvedl and silnplied construction. The invention is illustrated in its preferred embodiment in the accompanying drawings, in which- Figure 1 represents a plan view of a socketequipped connector constructed in accordance with my invention; Fig. 2, an end elevational view of the same; Fig. 8, a longitudinal sectional view taken as indicated at line 3 of Fig. V2; Fig. 4, a transverse sectional view taken as indicated at line 4 of Fig. l; Fig. 5, an enlarged longitudinal sectional view of one of the terminals shown in the preceding figures; Fig. 6, a plan view of a connector plug constructed in accordance with the invention; Fig. 7, an end elevational view of the same; and Fig. 8, an enlarged sectional view of one of the terminals shown in' Figs. 6 and 7.

In the construction illustrated, A represents a socket-equipped connector element;

and B represents a companion connector ele. ment adapted to be entered in the soclret of the element A. l y

lIhe connector element A comprises a plug l of insulating material; terminals 2 ertending through the plug l, and a socketshell 3 in which the terminal end of the plug l is entered and secured. Eachof the terminals 2 comprises a relatively large elongated outer shell 4; a relatively small elongated inner shell 5. tted within the shell 4 at an intermediate point; a plunger-form contactmember 6 telescopically movable within one end of the shell 4; and a coil-spring 7 confined between the xedly secured 4inner shell 5 and the movable contact-member 6.

rlFhe outer shell 4 may be drawn from a metal disk into the form ot an elongated cup, the central portion of the bottom ot the cup then being punched out to form an openingl through which the plunger-form contact-member may protrude; or, if `desired,` the shell 4 may comprise a seamless tubehaving-one end spun inwardly to form a flange 8.

',Ihe small inner shell 5 may be drawn conveniently from a metal disk which is stampedinto elongated cup form. The bot-l tom of the cup `forms a seat or bearing for one end of the spring 7. rll`he member 5 is forced into the open end of the tubular memi ber 4 with a snug tit, and the open end ot the `member 5 is disposed a short distance inside of the open end of the member 4. Thus the bore of the member 5 is adapted to receive the naked wire` portion of a conductor `8, while the insulation of the conductor is accommodated within the open end ot` the larger tube 4. One wall of the shells 4 and 5 is provided with a threaded perfow ration 9. 'Ihe `tapped perforations` 9" are adapted to receive screws l0 which are inserted through lateral openings 1I with which the insulation plug l is provided.,

The screws 10 serve to secure the conductors in the socket-members 5 and at the same time firmly unite the socket-members 5 to the relatively large shells 4.

The yieldingly-held contact-members ti are preferably elongated cup-shaped members'stamped or drawn from metal disks. rlFhe members 6 have enlarged' baseportions 6u` which ht freely within the tubular members 4 and engage the inturned Hanges 8 when the members are projected as shown in-Fig. 5. y Y l The socletfshell 3 is providedwith bayf onet lslots l2 in the usualmanner.

The connector element B comprises a plug la `of insulating material; and metal terminals 2a extending through the plug la. Fach metal terminal 2a comprises arelatively large elongated outer shell 4a and a rela tively small elongated inner shell 5 which is fitted within or iixedly secured in the shell 4a atan intermediate point. rIhemembers 4u and 5iL are preferably drawn into elongated cup-form from metal disks. 'Ihus the bottom of the cup which forms the mem-I ber 4a comprises a contact end 6a; and the member 5a affords a conductor socket adapted to receive the ba red wire oiE the conductor 8, while the insulation oi.E the conductor is accommodated by the open end ot theen ternal shell ta. The shells 4a and 5a are pierced by a threaded or tapped perforation 9a. The conductors are secured in the conductor sockets 5a by means of screws l0a which are entered through lateral openings l1a with which the insulation plug la is provided. The plug la is fitted with a transverse stud 13 adapted to engage the bayonet slots l2 of the socket-shell 3.

The connector elements A and B are united in the usual way, in making the connection, by entering the plug la in the socket 3 and causing the stud 13 to interlockingly engage the bayonet slots of the shell 3.

The construction described is simple, cheap and durable. The terminals may be produced very cheaply, inasmuch as all screw machine work is -dispensed with.

The foregoing detailed description has been given for clearness of understanding only, and no unnecessary limitation should be understood therefrom, but the appended claims should be construed as broadly as is permissible in vieW of the prior art.

1What I claim as new and desire to secure by Letters Patent is 1. In an electric connector, a plug of insulating material, a terminal in said plug comprising an elongated metal shell having an open end and provided at the opposite end with a contactsmember, a smaller elongated shell titted therein and having an open end spaced a distance from the open end of said irst-named shell, an electric conductor received by said smaller shell, the opening of the larger shell being adapted to accommodate the insulation of said conductor, and a screw extending through a wall of said shells and engaging said con.- ductor. A

2. In an electric connector, a plug ot insulating material, a pair of terminals in said plug, each comprising a pair of elongated shells one of which is fixedly secured within the other at an intermediate point, a plunger-form contact-member slidable in one end of the larger shell, a spring confined between said ixedly secured inner shell and said contact-member, a conductor having a barcd extremity entered in the inner shell, the open end of the outer shell accommodating the insulation of' said conductor, screws entered through lateral openings in said plug and passing through said shells and engaging said conductors, and a socket-shell fitted on said plug and housing the contact-ineinbers of said terminals.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2729800 *Apr 23, 1953Jan 3, 1956Lewis Eng CoElectric wire coupling
US4461523 *Dec 1, 1981Jul 24, 1984North American Philips CorporationProtective lampholder for bayonet base lamp
U.S. Classification439/700
Cooperative ClassificationH01R13/2421