USRE14020E - Electbic connector - Google Patents

Description

4. Y I9 nnl |01 ST4. NCG Eu. nn.NA AND EOE TCL SCH .RN CTO ICI JEH LC EU P P A Reissue@ Nov. 23, 1915.

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, UNITED sTATEs PATENT proved construction ELECTRIC coNnEc'roR.

kvSpeciication of To all 'whom it may concern.'

Be it known that I, JASON C. STEARNS,

'a citizen of the United States, residing at lorcester, in the county of lVorcester and State of Massachusetts, have invented a new and useful Electric Connector, of which the following is a specification. l This invention relates to a plug or connector for electrical purposes and the principal objects thereof are A.to provide an absolutely certain device for connecting a circuit when the! plug is presse/d in, involving surf faces Awhich are caused to rub along each other instead of simply coming into contact in a normal direction; also to provide an lim-v of the members for producing this contact; to provide an arrange ment whereby the. plug member can be turned to two positions, on the right and left, in one of which the circuit is made in'l the above mentioned manner, and in the other of which, although the plug is firmly held inthe socket yet the terminals are out of contact; to provide an improved slot arrangement forsecuring this result; and to provide simple means whereby the plug can not be pushed in or pulled out accidentally. The invention also involves further details of construction which will appear hereinafter. Reference is to be had to the accompanying dra-wings in which: Figure 1 is aside elevation of a preferred embodiment oft e invention showing it applied to a-tail lamp socket and connector plug, a portion of the socket being brokenv away; Fig. 2 is a longitudinal central sectional view of the same with the parts vin the position in which the contact is made, the position being the same as in F-ig. 1; Fig. 3 is a Similar view with the parts inthe off position; Fig. 4 is a sectional view similar to Fig. 2 showing a. modification used for a wooden dash connector; Fig. 5-is a perspective view of the slit bushing; and Fig. 6 is a side view, partly in section, of certain details.

Referringl first to Figs. 1, 2 and 3 it will be seen that the connecting device .comprises a socket member 10,show1i in the form of a metallic shell having an insulating plug 8 therein, and a plug member 1li The socket` is provided with a spring-pressed metallic plunger 12 therein, in this form having an insulating end l3`of hard rubber or the like.

JASON C. STEABNS, WORCESTER, MASSACHUSETTS.

I body o f the plug c1rcu1t 1n any desired way. The sheet metal central passage usual, are a general T-shape,

fact that the bushing onirica Q Ressued Letters Patent. Reissued N OV. 23E 1915. N o. 808,142. Application for reissue filed August 4, 1,314.

Surrounding this` plunger is a hollow metalllc guide 14 which, being mounted in the plug 8, holds the plunger in proper position and prevents its disengagement from the socket and also has atits outer end a slanting, rounded, or conical surface l5. The guide is shown as of metal, preferably brass, and is electrically connected with a metallic plunger 9 at the other end of the socket.

The parts of the plug member which engage with the plunger and 'guide are as follows :#The end of the plug is provided with a cylindrical axial opening in which is a slitted bushing 16. This bushing in the form shown, is made up of a piece of sheet metal pressed into cup Jshape, the walls having-,three longitudinal slits or spaces. It is secured in position by a screw 17 lpassing through the perforated bottom of this bushing into the body of a metallic insert 19 located in albushing 19"* in the hard rubber and connected with the of the bushing 16 being resilient, its three sections press inward from the walls of the through the plug andA -form a yielding connection. On the plug, as pair of pins 18 and the socket with slots which can'be of the butin this case each has lts transverse end 20 inclined at an angle to the longitudinal part'2l of the sl'ot. T hese parts 20 and 21 are for receiving the is provided pins 18.

The length ofthe sli'tted bushing issuch that when the plug is in position with /the pins at the inner end of the longitudinal slots 21, the end of the bushing, which is of the -same diameter as the end of the guide, comes into contact with the latter. .By the`95 turning of the plug to get theipins into their i extreme lower positions, in the transverse ends 20 of the slots, as seen in Fig. 1, the guide 14 enters the spring bushing and forms a positive self-cleaning contact. The

is slit'permits a slight yielding .in order that this `contact may be more intimate'.

When the plug is .turned to such position that the pins are in the upper end of the slot 105 20, the insulatingend of the plunger, as shown in Fig. 3, is still .engaged in the end ofthe opening inthe plug but the insulation only contacts with the screw head and there is no electrical contact. Thus, when worn or even dlrty contacts and that the position that by giving candescent lamps with any overcome this I 'ter with resilient 2 and 3 except that parts are in such theml practically the current is shut olf, the

onlyl a quarter turn vturned on.

Asordinarily applied to automobiles, in-

are not lrigidly held and consequently they vibrate and getout of focus with the reflector. This causes them to give the appearance of flickering. Tol mount the cylindrical base 3() of the lamp in the end of the cylindrical casing 10, for example, and provide the lat-J .inwardlyL bent tongues 3l formed by slitting the casing longitudinally. I have. shown two of these tongues oppositely placed. They are used in connection` kind of pin 32 and slot 33. Thus the lamp is held in central position and cannotl move materially in the socket. The tongue 31 also forms a perfect rubbing con.

tact with the lamp basewhich is importantV on a lamp construction as shown. In the form shown in Fig'. l the conditions are similar to those shown in Figs.^l,

the plunger 26 is metallic clear to 'the end and consequently is capable of forming a contact. with the screw '27 and completing he circuit immediately after the plug is inserted andy-before it is turned into its locked position. In this case there is no need of a'T-shaped slot because it is impossible to hold the plug in such position in the socket that there will be no electrical connection. However, in ca se of lodg ment of dust or other insulating particles on the screw head or the end ofthe plunger, the use of a slotl which necessitates the turning ofthe plugv around into locked position will insure a perfect electrical contact between the end of the guide 28 and the this case oneI of theA lterminals 34 is connected 4with .the casing 35 so as' to ground it, the metallic casing Abeing mounted on an insulating dash, and being itself grounded on theframe of the machine.

It -will be lseen therefore that the principle involvedin the guide and slitted bushing permits of a certain electrical connection Whenever that isdesired even in case of old,

be carried rout in connection form of slot and thet locking certain additional advantages which have been set forth.

While 'I have shown the plunger and guide as mounted on the socket andthe split bushingas mounted on the'plug, itis obvious that 'the reverse arrangement may be used to attain the same results. It is also principle can lwith' the new plain that the plunger guide can be .slit toprovide resilient arms instead of slitting as set forth in the claims, and I do not wish the current can be:

' its edge in position to engage falce of said guide when inserted in the to be limited to the specific forms and details herein disclosed.

Although I have illustrated and described only two forms of the invention, I am aware of the fact that it can be carried out in many 7oother forms' and applied` to many kinds of electrical connectors and attachments either in the one wire `or two wire systems without departing from the scope of this invention Therefore I do as set forthin the claims. not wish to be limited in these respects but What I do claim is 1. A connector or coupling of the class described, comprising a socket member, a

plunger therein, a metallicguide surround-I ing the plunger, and a plug member having a recess in alinement with said plungerand guide to receiveY the end of the plunger therein and provided with a metallic bushingin said recess adapted to be. connected at its bottom with the circuit and having the end sur-A socket member.

2. A connector or coupling of the class 90 described comprising a socket member, a

central longitudinal spring-pressed plunger therein, plunger and having an inclined end. surface,

and a plug member having a central recess e5 in alinement with said plunger` and guide to receive the end of thev plunger therein and provided with a yielding metallic bushing in said recess and having its edge in pothe inclined end surface of said guide when inserted in the socket member. v 3. The combination in an electrical connecting device, -of` a socket member pro-4 vided with a hollow guide, the' end of said guide being inclined and the plunger having aY non-conducting end, of a plug member having a longitudi-L nal recess extending 1n from the endV regis- 11( tering with said plunger, said recess being rovided with a resilient metallic slit lining,

whereby when the' plug islin the socket member with the plunger pressed against the bottom of said lining the edge of the llining can come in contact with the edge of said guide. i

4. The'combination in an electrical connectingdevice, ofa socket member provided' with a `central aXial'hollow guide, a spring- 12e ing in from the end', Said recess being provided with a metallic longitudinally slit lining, means for holding said lining 1n pcf. sition, and means whereby the plugcan be held in thesocket member with the plunger '13 a 'metallic guide surrounding the guide, a spring-pressed 10'5 lplunger 'projecting from the end of said longitudinal recess eXtend- 12 l 55 tion' of insulating material havin therein, said recesses being longitudinally" pressed against the bottom of said and the edge ofthe lining in contact With the conical edge of sai`d guide.

5. The combination 1n an electrical con- 5 necting device, of a`socket member provided Witha' hollow guide, av spr'glg-pressed plun ger projecting from the end of said guide,

the end of s`a1d guide being conical and the.

4plunger having a Lmetallic part and a nonconducting end, of a plug member having a longitudinal recess extending in from the end, said recess bein provided with a resilient metallic slit lining, means for holding said lining in position, a pin extending out -\laterally from. the plug, and a slot in the Wall of said socket member, said slot having a longitudinal portion and a transverse por.

tion arranged at an inclination Whereby when-the pin isjin the most extreme part of 2 0 said transverse portion of the slot, the lining will be in contactwith said guide and Where- I by when the pin is inthe lowest part of said *slotI the lining and guide Willbe out of contact. 'g

6. A connector or coupling of the class described,'comprising a socket member havingf a longitudinal recess therein, a plug member Afitting within said socket member and also having av longitudinal recess therein, one of said recesses having a metallic guide mounted therein and a plunger carried by thatl member longitudinally movable in said guide and adapted to engage the bottom of the other recess, and the other recess having a resilient metallic bushing secured thereln,

effective to yieldingly engage the guide when the plug and socket are in operative relation. i 7. A connector or coupling of the class 40 described, comprising a socket member, and

Ia plug member itting therein, one of saidv parts ca rying va plunger spring pressed and a metallic guide surroundin and thel otherspart carrying a bushing alined with said plunger and guide' and gadapted to be connected with an electrical; circuit and to receive the end of the plunger against the bottom surface, said guide and lbushing resiliently engaging Y each.' other when in operative relation to form an elective electrical connection.

8. A connector or coupling of the class described, having, in combination, a socket member and a plug, each including a poralined,. a spring-pressed lplunger in one 'of said recesses positioned t erein bya longi-l tudinally extended guide supported in' said recess, and a bushin recess for receiving t e plunger, said bushsald plunger,

a. IeCeSS -Wanesses secured in the other ing and said guide being effective to form, an electrical connectionA and including resilient' contacting portions.

9. A connector or coupling of the class described, having in combination, a socket member and a plug, each includin a portion of insulating material having a recess therein, said recessesA being longitudinally alined, a'spring-pressed plungerin one of 70 said recesses positined therein by a longitudinally extended guide supported in said recess, and a bushing secured |in the other recess for' receiving the plunger, said bushing and said guidelbeing eii'ective to form 'an 75 electrical connection'and one of said members being slotted to form resilient contact arms.

10. A connector or coupling ofthe class described comprising a. socket member and plug, each includingqa portion of insulated material having a recess therein, said recesses being longitudinally alined, a springpressed plunger in one of said recesses having an msulating end, a longitudinally ex- 85 tended guide supported in that recess for Jthe plunger, and a bushing secured in the 'other recess for receiving the plunger, said bushing and guide being adapted to-form an electrical connection and including resilient contacting portions. v 11. A connector or coupling of the class described,J comprising asocket member having a longitudinal recess therein,v a plug member adapted to lit within said` socket member and also having a longitudinal recess therein, one of said recesses having a,v metallic guidemounted therein and a plunger longltudinally movable `in the guide,

said plunger having van insulating end adapted to engage the bottom of the other recess,

said. other recess having a resilient metallic bushing secured therein adapted to yieldingly engage tlie guide when the plug and y socket arein operative relation. 105

' 12.- A connectoror coupling of the cl -my hand, in the presence of two subscribing witnesses. 7

. 1 JAsoN c. s TEARNs.

Cms; T."HAw1-.EY, /Vv e CATHAmnn I.v HR'rNE'rr,V 1 f

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