US1609230A - Swivel attachment plug - Google Patents

Description

Nov. 3o 192s. 1,609,230

C.' E.,WARNER swIvEL ATTACHMENT PLUG Filed Nov. 1 1920 2 Sheets-Sham I Nov. 30,1926. 1,609,230 C. E. WARNER swzvsn ATTAGHMENT PLUG Filed Nov. 1. 1920 2 sheets-sheet a Fig. 8;

Patented Nov. 30, 1926.

CHESTER E. W'ARNER, 0F BERWYN, ILLINOIS,

MANUFACTURING COMPANY, OF CHICAGO,

ASSIGNOR TO BENJAMIN ELECTRIC ILLINOIS, A CORPORATION OF ILLINOIS.

SWIVEL ATTACHMENT PLUG.

Application led November 1, 1920. Serial No. 420,909.

My invention relates to .electrical connector devices, and more particularly to swivel attachment plugs.

One of the objects of my invention is to provide an improved swivel attachment plug which will be durable and efficient in use, easy to wire and cheap to manufacture..

Further objects will appear from the detailed description to follow and from the appended claims.

In the drawings in which two embodiments of my invention are shown Fig. 1 is a side elevation of a swivel shell attachment plug;

Fig. 2 is a top plan view of the plug shown in Fig. 1 on an enlarged scale;

Fig. 3 is an axial section on the line 3 8 of Fig. 2;

Fig. 4 is substantially a section on the line 4 4 of Fig. 3 but showing the plug wired' Fig. 5 is a perspective view of the sliding contact;

Fig. 6 is a side elevation of another form of attachment plug embodying my invention;

Fig. 7 is a plan view ofthe plug shown in Fig. 6;

Fig. 8 is an aXial section on the line 8 8 of Fig. 7;

Fig. 9 is substantially an axial section on the line 9 9 of Fig. 7 but showing the plug not wired;

Fig. 1() is a view on the line 10 10 of Fig. 11 is a view on theline 11 11 of Fig. 8; and

Fig. 12 is a detail perspective view of the sliding cont-act member.

Referring yto the construction shown in Figs. 1 .to 5 inclusive, this comprises va swivel shell attachment plug 15, in lwhich both of the binding terminals are located outside the threaded shell contact at the 7 entering end of the plug, and in which both of the wires are secured in place by the same operation.

yThe plug 15 comprises a threaded shell contact 18, a center Contact 19, an insulating handle member 2O securedv to the threaded shell contact `18, a binding terminal construction 21 forl securing the wires 16 and 17, a sliding cont-act member 22, Vfor swivel or sliding engagement with the threaded shell contact 18, whereby the threaded shell Contact 18 can be rotated without twistingl the cords 16 and 17, an insulating base 28, for supporting the center contact 19, the sliding contact member 22, and the wiring terminal construction 21 and insulating the parts with respect to each other, and an insulating spacer or washer 24 for insulating the wires 16 and 17 from each other, and

forming part of the binding terminal construction 21.

The threaded shell contact 18 has an in wardly extending annular iiange 25, which extends into a corresponding rabbet or recess 26 in the insulating base 23, the sliding contact member 22 having wing portions overlying the inwardly extending flange 25,

f which is connected with thesliding contact member 22, the sli ding contact member 22 is provided with an opening 27 in the wing portion 28 through which the'end of the conductor 17 is led to its binding terminal. In order to position the sliding contact member 22, the insulating base 23 is provided with three bosses 29, 30 and V31 (Fig. 2) which straddle the sliding contact member 22 and prevent it from rotating with respect to the insulating base 23.

The wiring terminal construction 21 comprises the insulating button or spacer 24 heretofore referred to, between which andthe slidingk contact member 22 the conductor 27 is clamped, and the'ce'nter contact screw 32, between which and the spacer 24 the end of the conductor 1:6 is clamped,this center contact screw 32 being threaded into a. nut 32a embedded in the insulating base 23.

The. upper face of the insulating button 24` is dishedslightly to afford a depression to receive the-end-of Vthe conductor 27, in which depression the conductor is clamped by the head of the center Contact screw 32.

In order` to keep the bared end of the wire yp p screw 32 is loosened up, the bared end ot the` wire 17 is wrapped around underneath the in sililating'spacer '2st, theba'red end of the wire 16 is wrapped aroundunderneath the center'contact screw 3Q, and the center con# tact screw 3Q is then madeto clamp both ot theconductors 16 and 17 by a Single operation.

ln screwing the pluginto a socket, the insulating base and sliding contact member 2&2 do not rotate but the threadedshell Contact 18, beingswiveled with respect to the'wirin'g terminals, can bev screwed into the socket without twisting the cord.

The construction shown in Figs. 6 `to 12 inclusive, comprises a threaded shell contact 40, acenter contact l1, an insulatingV handle member l2 (which maybe of wood it desired) secured to the threaded shell contact 40, a wiring terminal construction 43 for clamping both ot the conductors all and l5 by a single operation, a sliding contact member L16 having a sliding or swivel engagement with respect to said shell contact L10', an insulating'base 47, andan insulating cap' e8 for Supporting the wiringterminal construction e3, the center Contact 41 and the sliding Contact a6 intheir proper relative position with respect to each other. The inwardly extending flange 49 of the threaded shell contact-'110 is located between thel insulating base L17 and the cap 18, whereby relative endwise movement is prevented', the sliding'contact i6 also being held 1n place between the base i7 and cap i8 andjinjslid-` ing engageinentwith the inwardlT extending flange 12X This slicing contactnnember 4,6 maj,7 be a sheet metal stamping having an arcuate tlanfe port-ion 50 which slidably en gages the inwardlj,vv entendin-gliangeflf, havingk an annular depressed portion 5 1 in which the end ot the conductor-45 lies, and` having a'plurality of' uprvfardly extending 52rwhich entendinto'recessesr in the insulating? cap .to position the slidingc on-j tact" member, 416 with vrespect tothecap 4 8 and base l? and preventrelative lrotation therebetween. ri'hese' upwardly' extending lugs/52 also serve to help confine the bared end off the conductor e5' and keep it away from the cei f contact screw.. Y

The'infsulatingbase 17 and cap` 8 are. centered with respect to each other and prevented from relative rotation by means of an upwardly extending annular boss 54 on the insulating base i7, this boss 54- having a laterally1 extending wing portion 55, the cap L18 being provided with a corresponding recess to receive the annular boss 5&1 with its lateral'extension 55, whereby the parts are centered toprevent relative rotation.

The binding terminal construction 4.3 comprises,v in additionto the head of the center contact screw 56, a dish-shaped sheet metal stamping 57, between which and the head ot the center contact screw 56, the-bared end ot' the wire 411 is clamped. The binding terminal construction @i3 comprises also the insnlatingbutton or cap- 4&3, between which.

and the sliding-,contact ettthe bared end ol? the conductor V45 ,is clamped. This Aclamping action is ell'ectedby means oi: the center contactrscreiv 56 which isjthreadedinto ametal bushing 56, embedded in the insulating base l?. The sheet metal stainping57is held in place on the insulating cap l-.8 bvl means ot' a. tongue portion 59 bent-'over a portion of the cap. The insulating base 4:7 and'cap i8 are provided with registering openings 60 and 61 ,respectiveliY for t-he passage ot the wire L14 to the binding terminal. The insu lating base e7 and cap 118 are provided with registering openings 62" and 63 respectively, foi-.the passage ot the teedjvire 45.

The wiring and operation 'ot' the device is substantially the same as in the torni previously described7 the screw eil being loosened, in wiring, suiiiciently to permit the end of the conductor l5 to be wrapped around between the sliding contact li6 and capa-S, and toj permit the end of the conductor all to be wrapped around'between the cup-shaped member 57j and the head ot the binding screw 56. The screw 56 isthen tightened down to clamp-both the conductors le and 415 at' one opera-tion'.

Having thus described my invention, what l claim as new and desire to secure by Letters Patent ot the United States is:

1.1311. swivel attachment plug` comprising a center contact, a shell contact, a sliding contact member swiveled with respect to said shell conact, and a wiring terminal construction for securing a pair ot wires comp-risingan insulating washer, between which andsgiidsliding Contact one of the wiresis helchand Aa screw between the head o' .\vhich and said washer the-'other wire is held.

el attachment plug comprising a ct, a shell Contact, an insnlat l @contact mounted on sai insul ly engaging said shell'conf washer between which andY said slidingcontact one of the wires is held,angl acer r Contact screw between which and the insulating washer the other Wire is held.

3. A swivel attachment plug comprising tween which and the insulating Washer the a center Contact, a shell Contact, an insuother Wire is held, said Center Contact screw latlng base, a sliding Contact mounted on serving to hold said Washer and sliding eon- O Said insulating hase, slidably engaging said tact in place on said insulating hase. shell Contact, an insulating Washer between In Witness whereof, I have hereunto suhwhich and said sliding Contact one of the scribed my naine.

vivire is held, and a center Contact screw be- CHESTER E. WARNER,

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