US1645957A - Extension connecter - Google Patents

Description

1,645, 5 Oct. 18, 1927. P. LAUTER 9 7 EXTENSION CONNECTER Filed Aug. 10, 1925 2 Sheets-Sheet 1 I, 1 Oct. 18, 1927. R LAUTER 45 957 EXTENSION CONNECTER Filed Aug. 10, 1925 2 Sheets-Sheet 2 Patented Oct. 18,1927.

PHILIP LJAUTER,

1,645,957 PATENT OFFlCE.

of NEW YORK, N. Y., ASSIGNORI-TO POIJYMET MANUFACTURIN coaronarron, A CORPORATION or NEW YORK.

Ex rENsI'oN CONNECTER.

Application filed August 10, 1925. Serial No; 49,224.

The present invention-relates generally to extension connecters adapted for use in the electrical art and more particularly. to devices used to join pairs of wires in order that the flow of current maybe continuous and uninterrupted and to hold the same securely in position. Such devicesare-used generallyin house wiring, -connecters for electric lamps, fire places, telephony, or in fact wherever it is desired to, join pairs of wires with ai ood electrical connection.

uch uniting of pairs'of wires has been accomplished by intertwist'ing the ends and taping, but such an expedient is a makeshift at best and very uncertain and unsiglitlyas well as presentingconsiderable risk of short circuiting with consequent fire hazard. Certain devices used for this purpose have been objectionably clumsy and unsightly as well as uncertain of operation and awkward to install in' the line. Such devieesalso are not capable. of joining wires terminating in metal tips, being merely designed to join the bare metal ends. The use of metal'ti ps has become increasingly popular as beingl much neater, safer and more convenient to andle.

'One ofth'e objects of my invention is to provide a small, neat device whereby, the

ends of pairs of wires may be conveniently joined irrespective to whether suchends'are merely bared or 'are provided'with metal tips. 3-

Another object of my invention is to join such wires with a positive electrical conneca pose.

tion, such connection being formed IS called a rubbing? contact.

be of a temporary nature, and readily de tachable at will, or of a semi-permanent torm.

Another object of my invention is the provision of means to securely hold the wires in position and prevent accidental dislodgrncnt of such wires.

A further object of my invention is to so construct the device that stresses or strains on the pairs of wires, which would ordinarily tend to sever the connection are taken upon heavy post-s provided for the pur- As a matter of fact such strains tend 1 to cramp the metal tips against the devices in such a way that the connection is stronger while such strains are applied.

by what and the wires omitted, A further object of my invention '13 to a Another object is to provide a neat,simpie and inexpensive device which is. attractiveinappear'ance, positive in operation and completely encloses the. connection in -insu-= lated material so as to.be safe to .use and handle and prevent any current leakage. de'viceshould last indefinitely as no part is. subjectto strain or excessive wear. Vith these and other objects in view, to beinorefully set forth hereinafter, thev in vention consists in the'novel'oonstruction, combination of elements and arran' ernent bf parts-whichwill be exe"; plified inft e opera-.- tionv and construction h ein described in the. following specification d illustrated in theaccompanyin drawings? The 'inventionwillfifirst be :described -inconnection with the-i; accompanying ;drawlugs, wherein similar referencdcharacters are used to designate correspondingparts throughout the several views,'jand more spa-.1.

pended claiins. :1 .-:Attention is directed: to the. drawings in: which: f j'. :"I 2:312:13 J

zFig. l is a pcrspectivewiew'of mysinuerr-' tion showing .the inethodtof erossing"the; wires in forming the conne'ctiomkwx: "1.. .o F g. 2 is .an end view wli lii .wires omitted, 2 5 Fig. 3- is a planvieiv-Ofthefib'wemhalt; with. a pair of wires-imposition tm'shovv the electrical connection, i 1 Fig. 4 is a sectional view, on theline of Fig. 3, with both halves-boltedI together My device is preferably molded 1'00 suitable insulatingj-"ma-terial' such as hard rubber, porcelain or any other of the 'molded insulating materials. Further my -'eXte $ion connecter is madefin two parts as.1-a-nd=..I-2;

each an exact'replica of the other and se I05 cured snugly together as by slotted bolts ,3 and nuts l located within thedecorative countersunk portions 5, F 1 and}. Each of the portions 1 and 2. ha's diverging bores springy contact points to make wiping contact with the wireonds as :with the metal tips-18 and: 19 when these tips are :forced home in the bores 8 and 9, (seeEFigsS). Thecontactwpoin ts- .17 are in normal position while the points .16 are in springflor' contact makingsposition, the casing beingprovided with the-recesses 20: .toifreelycpenmit of this movement :oi the contact points. The shear ders -2liformed the casing prevent the opening out. 'of'the contact points and assists in holding them horma'lly iin position *Inutilizing my 'conn'ecter-the wires 22 and 23: terminating im the--met'al tipsrl9 and 18 respectivefytare crossed in therecess 11 and thew-metal: tipsare forced hoinein the bores 9 and 8 respective1y.-- The-wires=24r and 25 are likewise' crossed'in recess ld and their metal tips-forced home in the-bores 7 and 6' respectively. .-Theelectrical circuit is now completepassing. iromithe wire 22 tip 19 cormectenJi5-tip in bore 7 and outwire 24:. Thusrit will be seen; that the current enters and leaves the device through. wires located conveniently on. the same side zofzthe device.

A strain on the wires 22 and 23 in a. direction' away. from the: device is taken: up almost entirely on the rugged post 13,-because of the crossing of the wires within the recess 11 -What little of the strain may be conveyed to the tips 18 and 19, merely serves: toeram pnthem all the tighter within -.their 8=iand 9. Thus astrain, as above. is taken up by the strong body (rt-my device and the. electrical connectio'nzis' undisturbed. r While inthe-fo-regoing description I have briefly described the means which prevent the- wires 22 and 23 from being dislodged, it is obvious that the wires 24 and 25 are also firmliy and securely held in position as the means for holding said wires are a.- duplicate of holding means for the wires 22' and 23. By utilizing my connecter the wiring'can be made oi considerable length and the connecter will make a very neat and azttractiiveappearance and firml hold the wires together without. fear of the same being." accidently pulled apart.-

As a; modification Figs; 5 to- 7, I provide additional bores 26 and 27, in: the sides of my device, loosely within-which are located headless slotted bolts 28' and 29 threaded through holes in connectors 14 and 15 and 'with their rounded ends bearing on the underside of the contact points. In this construetion the shoulders 21 are omitted as it desirable to screw the bolts so as to force the contact points towards the side of the bore so as to securely pinch the bared end of the Wire or metal tip within the de vice. With this construction'it is possible to leave the contact point in springy condition, as for a temporary connection, as with tip 30, 6 or the bolt may be screwed .home,within-thenbore, to force the contact .forin shown and described, the same being;

merely illustrative, and that the inventioncan be carried out in other ways without departingfromithe spirit of my invention, and therefore, I claim broadly to employ all. equivalent instrumentalities coming. within the scope of the appended claims, and by means of which objects of my invention are attained, and new results accomplished, as herein set forth, as it is obvious thatthe par-. ticular embodiments herein shown and described a-r'e onlysome of many that'can be employed to attain these objects and accom plish these results; v

Having now described my inventiomwhat Iiclai'm-and desire ,to secure by Letters Patent, is l 1. In: an attachment plug, a pair of insu lating. plates, each having grooves radiating from. the center to the edge and so arrangedthat when said plates are superimposed, the grooves of. one will coincide with the grooves of the other to form converging cord tip re eeiving passages, and a partition having T- shaped ends and contact springs clampedaround said ends to Contact with cord tips positioned in said passages.

2. In anattachment plug,. a pair of insulating plates each having groovessradiab ing from the center to the edge and soarranged that when said plates are superim posed the grooves of one will coincide with grooves of the other to form converging cord tip receiving passages, and a partition having T-shaped ends, and C-shaped. contact springs clamped around said ends to con tact with cord tips positioned in said passages.

' 3. In an attachment plug, a pair of insulating plates each having grooves in one .of' its faces, said grooves being so arranged that when said plates are superim osed' the grooves in one will coincide with t e grooves of the other to form cord tip receiving passages, a narrow recess formed in said plates to retain a. C-shaped spring of flat thin metal, the opposite ends of said spring extending into opposite passages to form resilient contacts for cord tips positioned in said passages, and means engaging said spring to cause said spring to releasably lock the cord tips against the Walls of passages.

4. In an attachment plug, a pair of insu lating plates each having grooves in one of its faces, said grooves being so arranged that When said plates are superimposed the grooves in one will coincide with the grooves of the other to form cord tip receiving passages, a narrow recess formed in said plates to retain a C-shaped spring of fiat thin metal, the opposite ends of said spring extending into opposite passages to form resilient contacts for cord tips positioned in said passages, and pressure screws engaging the ends of said spring to cause said spring to be forced against the cord tips to releasably lock the cord tips against the Wall of said passages.

This specification signed this 31 day of July, 1925.

PHILIP LA UTER.

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