US1276216A - Electrical connection. - Google Patents

Description

E. A. HAWTHORNE.

ELECTRICAL CONNECTION.

APPLICATION men MAY 20. 1915.

ll} Z3 Patented Aug. 20, 1918 'ELLSWbBTH A. HAWTHORNE, 0F BBIDGEPOR'I', CONNECTICUT.

ELECTRICAL GONHEG'IION.

Specification of Letters Patent.

Patented Aug. 20, 1918.

Application filed May 80, 1915. Serial No. 29,418.

To all whom it may concern:

Be it known that I, ELLBWORTH A. Haw- THORNE, a citizen of the United States, re-

.siding at Bridge ort, in the county of Fairfield and State 0 Connecticut, have invented an Improvement in'Electrical Connections, of which the following description, in connection with the accompanying drawings, 15 a specification. like characters on the drawin representing like parts.

This invention relates to electrical connections and the like, and among other ob ects aims to provide a strong and simple connection for securely holding electric conducting wires to a plug or socket.

The character of the invention maly be best understood b referring to the 0 lowing description 6 illustrative embodiments thereof shown in the accompanying drawin wherein:

igure 1 is a side elevation of one illustrative embodiment of the invention;

Fig. 2 is a. longitudinal section taken on line 22 of Fig. 1;

Fig. 3 is a side elevation of another embodimentof the invention, and

Fig. 4 is a longitudinal section taken on line 44 of Fig.

Referring to the drawing, desiginates aving n wicelectrical conducting wires ual insulations 3 inclosed in an insulation cable 5 protected by a coiled wire flexible metal covering 7 The wires 1 are extended beyond their insulations 3 and inserted in sockets in pins 9 of brass or other appropriate materi'aI'n-nd are secured by screws 11 tapped into said pins. In the opposite ends of said pins are sockets containing spring-pressed terminals 13. The pins 9 are mounted in a plug 15 of hard rubber or other a ropriate material havin a circumferential ange 17 between a smoot portion 19 adapted for insertion into a socket of a lamp or other device and a threaded portion 21'for a purpose to be described. To hold the smooth portion of the plug in its socket it is provided with diametrically opposed ins 23 adapted to cooperate with slots of t e socket and constitute a bayonet joint connection between them.

motion is of the wires at their point of connection with the pins tends to weaken the same and enable their separation from their binding screws. The fabric of the insulation cable is likely to become frayed and expose the portions of the wires ad] acent their entrance into the pins and present a ragged and unsi htly appearance.

o overcome the above andother objections I have rovided connecting means for the wires an plug comprising a casing 25 of hard rubber or other a pro riate material having one end interna 1y t readed to receive the threaded plug end 21 referred to. The casing projects beyond this end of the lug a considerable distance and is made 01 ow tO-rfOIIIl a housing for inclosing .portions ,of the wires, their insulation, its metal coverin and the ends of the socket pins to which jlie wires are connected.

To connect the casing with the flexible metal covering of the wires, there may be provided a sleeve 27 embracing said covermg and projectin a substantial distance into said casing. o securesaid ca and sleeve together the former is provid 'with an internal flange or shoulder 29 forengagement with an external flange or shoulder 31 on said sleeve. By this construction the easing is positively prevented from pulling oif from said sleeve. To secure said sleeve tightl to said metal coverin the sleeve y kerfs 33 therein and the end portions of said ave a series of longitu inal slots orsleeve may be tapered and tap ed to receive a nut 35. When this nut is tig tened, it will press the sections of the sleeve'between said slots toward and into tight gripping engagement with said metal covering. By this construction there is provided means for securely connectin the plugwith the wires independently of t e'screws 11 referred to. Consequently there is no likelihood of the wires ullin away. from their screws and a smooth finis ed appearing con rovided.

The mo ification shown in Figs. 3 and! is similar to that shown in Fi' 1 and 2, with the exception that instead of providing a hard rubber sleeve 33, a sleeve 37 is rovided of rubber or other flexible material. 0 limit relative movement between said sleeve and the ca 25, the sleeve has an outward flange 39 similar to the flan e31 described," and a circumferential bea 41. To

clamp the yielding rubber sleeve 87 to the V connection ited by the flange on said plug. 'when thus set up on the wire covering 7, there is provided thereon a band 43 of rass or other appropriate material having cars 45 held together bya screw 47. To contribute to the ,preventing of this" band from slipping along the sleeve it may be located between the circumferential head 41 referred to, and a second circumferential bead 49.

,.To facilitate the screwing of the casing on the lug the former may be rovided with a ribbed or roughened externa surface as shown.

In appl ,ing the connection, first the sleeve is inserte into the casing until limited by the inter-engagement of their shoulders; then the sleeve and casin are slipped onto the metal covering of t e wires to a point a sufficient distancefrom the ends of the wires to permit convenient, access to the latter. Then the bared ends of the wires are inserted into the pin sockets and secured by tightening their holding screws. Next the cap is slid out along the metal covering and r0- tated thereon to screwthe same onto the threaded end portion'of the plug u til limhe cap lug will drag along the sleeve with it,- and t en the sleeve clamp or nut is tightened to securely hold the, sleeve to the covering, thereby completing the con nection. 7

Ifthere is any pull tending 'to separate the wires from the plug it will be positively resisted by the cap and its connections to the plug and wi es independently of the screws which secure the ends of the Wires in the plug). Thus a permanent electrical is insured.

' two ween the wires and the plugs tion has been shown and described as applied to two electrical conducting, wires, but obviously an number of wires might be emloyed, if esired. While the connection has een described for electrical conducting wires, obviously its field of use is not limited thereto.

Having described illustrative embodi ments of the invention without limiting the same thereto, what I claim as new an sire to secure by Letters Patent, is:

1. An electrlcalconnectlon comprising a sleevehaving an internally flanged bore, a

contact lug seated in one end thereofand II wire ho ding device com rising a tubular member pro ecting having a flange seated on the flange of said sleeve and a compressible neck and clamping means to compress said neck about a Wire passed through said tubular member.

2. device as described in claim-1 wherein the neck is rendered compressible by longitudinal slits 33 therein.

3. An electrical connection comprising a sleeve having a bore, a contact lug removably seated in one end thereoE a tubular member to receive a wire leading to the plu insertible in the sleeve from said one end and having rovision preventing withdrawal from the ot er end, said member having a com ressible portion projecting from said other end and means to com ress the same about the wire which passes t erethrough.

In testimonywhereof, I have signed my name to this specification, in the presence of subscribing witnesses.

ELLSWQRTH A. HAWTHORNE. Witnesses:

E. Homer.- HAWTHORNE,

E; S'mwm'r HA THORNE.

from t e other end and It is hereby certified that in Letters Patent No. 1,276,216, granted August 20, 1918, upon the application of Elley rorth A. Hawthorne, of Bridgeport, Connecticut, for an improvement in "Electrical Connections, an error appears in the printed specification requiring correction as follows: Page 1, line 81, and page 2,

lines 22, 26, and 34, for the word eep." read casing; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 8th day of October, A. D., 1918.

R. F. WHITEHEAD,

Acting Commieeioner of Palm.

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