US2424938A - Electrical connector - Google Patents

Description

July 29, 1-947. B.- A. LUNDY ELECTRICAL CONNECTOR Fil'ed May 3, 1944 PHCUH n", I T" 1.1. A. Hl I 1 I H Y., a eorpoi'fatorrV of N'w York s Y Aplilicatil My 3, 1944, `Serial IO-"533,836

.-nzz, at 12J.' 523411, .Y ,1 sv .1: 41:1...1Qlfg tunisini/enden. relates@ electrieitnespecially conductors, andi Diep u1 -A.principal:Qbiectioith w e a: reaiiiiyiietachable connector Suchthat all parts wilma-:protected by. insii lation n snQhwisathai faeypkiiectbearing thereagain.. llnQtbeplaQad in electrical contact with the conducting parts er; C 1 .l f -l .,f 5,.; o Qth'er p eets and advantaees-iwi1lsapnea.. as the description of the particular physical embodimerit selected tos Villust/rat .inventieriepmgrasses, A and .the .novel ieatiires willbe particularlypointedroutin the appended e. m f .y

In ,describing the invention in dei. 1 partiiilanphysieal embodiment.: el

geteilte trate the invention{reference} ,willibe .h 1 accompanying L draWiriaand the; Seremi, z thereornmin yvhich'Jike parts are designat d b l likecharacters throushoutfarid iniwhichf 1 '3 is a cross sectionalggiew of'lthvegdevicenassh wn by 1 on the plane Lindicated by thehline III-III, viewed in the direction of the arrows f at the ends ofthe. line; Fig.4 is an exploded View @of the deviceas shown by Fig. 1 with yslome parts iin section; Fig. 5 is across sectional View onl the iplaneindicated by the line V-Vof Fig.'4, Viewed in *the rdirectionof Vthe arrows at the ends of the line; Fig. 6 is a cross sectional View on the plane indicated uby the line VI-VI of vvFig. 4, Aviewed in the direction of th'e arrowsatthe endsofthe -stance the railwayhsignal' art,"'is standard, and

therefore, uniform in its dimensions and threading.- I`t may be secured in any appropriaterannerto-thle-basefl.

These binding posts are very frequently assem- 'bled on one support in large numbers and on very fclose spacing. The usual spacing is one inch Yon centers.

In many situations, especially in the railway signal art,it is quite often necessary to remove the conductors connected to binding posts, as 2, for various reasons, `such as the replacement of relays, or the testing of circuits. The multiplicity of conductors that are released, in certain situations, aiiords ample opportunity for improper electrical contact between conductors removed from binding posts and also affords ample indicia upon the binding posts so that they may e Electricalipenneption alsmede to .binding :09st 2 i .rami suitable inusual manne1j conductor toibegelectrically nneeted to ,binding post '2. is .designated his conductor, as usual, has an onteninsiiletednavering y i. 1

,begnagiilxproper-ly.replacedv .i

. which, 'when lisais p .itioned .over and .lo

tire gli isLmade t tiriemaief riaLI-s as aphenolic. condensatipnpredu ,e InLorder..tdsuitamyessemme the Shell 9, with itsgseyeiialeomponent:parte in? conditionne; be placedruponihe pliiel 1 first place, on the @onf duetor; 4,the metallic sleeye LD together with nut .I 'I washer J Z.; shell and sleeye 1.3, .Theseumay .berslpped lipalong. the .conductor 0i1t1pithe-way so as not.; to interfere .withithei .further manipula- .ducegth'eflend 1114,; Thistandis passedjthrough vthe erabilylapstrlanded cable; conductor,` the" strands are divided and part of them are wrapped around a projection I'I on a bushing I6 and part on the projection I8 on the bushing I6 and then they are preferably securely soldered to the bush-ing I6, making a rm and permanent mechanical and electrical contact with the bushing I6.

After the electrical conductor is properly secured to bushing I6, the parts are then brought into position, that is, the sleeve I3 is pushed up into the shell 9 and the bushing I6 is passed through the orice I9 of the shell 9 and then the washer I2, being positioned on top of the shell 9, the nut II is screwed onto the bushing The sleeve I3 is preferably slitted in one or more places as at 24, 25 and 26, and is made of' an internal diameter such that it fits nicelybut with somewhat of a spring pressure over the plug 1 so that when the shell 9 carrying all ofA ,they` parts is forced down to position, as shown in x Figs. 1 and 3, electrical connection is made between conductor 4 and binding post.2. Ii at any time it is desired to test the ,circui the wire or conductor 4 is grasped and, upon being pulled upwardly, removes the shell 9 and its associated parts from the plug `1,'so that an electrical test may be made by connection to plug 1 which will not include theconductor 4, and an electrical test may also be made by making electrical connection to sleeve I3 without including the binding post 2 and plugT in the tested circuit.` A

After the testing, the parts are placed in the position as shown by Figs. l and Sby simply thereby holding the disk 3| securely in place.V In order to form plug 1 so that it may best be spun over at the top, a slight depression is made in the top of the plug 1 leaving a thin wall 33 extending up from the top of the plug all around the top thereof.

In order to best hold the sleeve I0 in place on s heel 9the sleeve is bent inwardly as at 34 and 35 and the shell 3 is provided with a channel 36 extending entirely around it, so that the bent-in portions, as 34 and 35 of the sleeve I0 may spring Aat the channel and hold the sleeve I0 in place. ,Although I have particularly described one particular physical embodiment only of my invention, nevertheless, I desire to have it understood 'that the form selected is merely illustrative but does not exhaust the possible physical embodiments of the idea and means underlying my inpushing the shell 9 and its associated parts down into position on plug 1 When the shell 9 is in position on the plug 1, there are no parts thereof which are not suitably protected against an undesired circuit connection by adjacent connectors, but if considered desirable a hanged disk 21 may be insertedin the top of the sleeve I0 to prevent any metallic parts from touching bushing I 6 and nut I I. This flanged disk 21 is provided with an orifice 28 to receive the conductor 4 and is preferably formed with slits as 29 in the ange 30 to facilitate its entrance into sleeve I 0 and resiliently holdit therein. p

As it is contemplated that these connectors shall be used in situations where a large number of them will be positioned in very close relationship, one with the other, and Where confusion may well occur, provision has been made to identify the parts so that they may be properly put together after having been separated. To this end, the sleeve I0 is providedwith suitable indicia, such as numerals, as the numeral I, shown in Fig. 1. The binding post izo-Which :this particular connector corresponds is also indicatedin any suitable or appropriate manner, but especially by providing a disk, as 3I, best shown in Figs. 3 and 6. This disk 3l? has indicia thereon corresponding to the indicia in the sleeve I0, in this case the numeral I. The disk is attached to the plug 1 in any suitable or appropriatemanner, but preferably by spinning over a portion, as 32, of the plug 1 on to the top of thedisk 3|,

vention.

`What I claim as new, and desire t0 secure by Letters Patent of the United States, is:

A device for electrically connecting a conductor to abinding post, including, in combination: an insulating shell, said insulating shell formed with an end wallV formed with a through bore, a metallic shell positioned within the insulating shell and adapted to be pushed down over a cylindrical plug bearing identifying indicia electrically connected with a :binding post, said shell formed with an end Wall formed with a through bore; a metallic bushing formed with a through :bore and shoulders and externally screw-threaded; a threaded nut for engagement with the thread of the bushing whereby the bushing may be passed through the through bore in the end wall of the insulating shell and the shoulders thereof bearing against the end wall of the metallic shell, the metallicshell may be held iirmly in position by the application of the nut to the bushing and whereby a bared conductor may be passed through the bore of the bushing, means to attach the conductor to the bushing electrically; and a sleeve adapted to be ypassed down over the insulating shell for protecting the-nut and bushing and .bearing identifying indicia.

BEVERLY A. LUNDY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS

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