US1279426A - Electrical attachment-plug. - Google Patents

Description

UNTTED sTATEs PATENT oEEIcE.

JOHANN G. PETERSON, 0F J ERSEY CITY, NEW J EBSEY.

ELECTRICAL ATTACHM ENT-PLUG.

Specication of Letters Patent.

Patented Sept. 17, 1918.`

Application led November 23, 1917. Serial No. 203,617.

-simple in construction,` quite compact and susceptible of inexpensive manufacture.

In the drawings accompanying and form-` ing part of the present specification I have shown in detail aV form of embodiment of the `invention which I will setforth fully in the following description to enable those skilled in the art to practice the same. I do not necessarily limit myself to this particular disclosure; I ma de art therefrom in several res ects wit in t e 4scope ofthe invention de ned by the claims following said description. y

Referring to said drawings: Figure 1 is a vertical sectional view of the lugwith the parts thereof assembled in full ines, the dotted lines showing the cap as disconnected from the body.

Fig. 2` is a bottom plan view of the plug.

Fig.`3 is a horizontal section on the line 3-3 of Fig. 1, looking'in the direction. of `the arrows.

Fi 4 is a section' on the line 4 4 of Fig. 2,100 ing inthe direction of the' arrow.

5 and 6 vare detail views 1n perspective o f terminals. y

Like characters refer to like parts throughout the several views, which are on different scales. f

The attachment plug comprises a base member and a ca tration' as those enoted in a general Way by 2 and 3 respectively. These two parts are after the usual fashion'detachabl 'associated'. The extension cord so cal ed, as

I .will hereinafter explain, is directly 'con-M nected with the cap member. The base member 2, involves in its structure a body as 4. This body or core is ofA some insulating material such as porcelain or composition. It is 'generally made of cylindrical shape and receives around it the base shell 5 which after the usual fashion is made of metal so as to constitute a conductor. The base shell member Such for illus? is threaded, thus adapting it to fit an incandesc'ent lamp or other socket. This base shell 5 as common in this class `of articles comparatively closely hugs or encirclesthe body or core el and atvm'reend; the base end as shown, is provided with a fiange 6 over'- lying the base portion of the body or core 4.. Said body or core has the longitudinal passages or openings 7 and 8 which as shown extend the complete length of the body. Said passages or openings 7 and S'are adapted for the reception of suitable contact members 9 and 10. The contact 9 is provided at one end with an inwardly extending terminal whichv is united in the presentcase electrically with the Contact shell 5. As shown said contact 9 is provided at its end with a lateral extension 411 which overlies the'flange 6 of the shell. As shown the insulating body 4 is provided with two hollow rivets, eyelets or screws as 12 which are molded into the insulating'body l and the projecting portions of which extend .through openings or perforations in the iiange 6 and lateral extension ll respectively, .the hollow rivets being headed over the lateral extension 11 to thus securely holdthe Contact 9 land the contact shell 5 in pro er relation 'with theinsulating body '-l. vis resilient contact 9 is as clear complemental to the Contact 10., the two contacts, however, being insulated from each other as I will hereinafter set forth. Thus the means whichv hold the contact shell in place secure. 4the contact 9 or analogous memberspin position or vice versa.

The Contact 10 is` rovided near its outer end with'the inward v bentortion 13, this in turn being provided wit the outwad prolongation 14 terminating in the disk L5 which overlies the central cylindrical projection 16 of the body or core 4. This disk -15 fits solidly latwise against the outer face of the central projection 16 and in the In view of this circumstance it is unnecessar as shown to` 'centrally perforate the bodY or core @for the rece tion Vof a'screw or t e Which'isgenera y in an attachment plug provided to secure' the central end contact in place and also in some cases to carry current. As a matter of fact not .only is this important, but I also attach some importance to the fact that I eliminate altogether in the base or body part of the plug at any rate, the use of screws. The free portions of the contacts 9 and 10 areengageable by complemental contacts associated .with -the cap member, and itis clear that when they are thus engaged'and that when the attachmentl plug isfitted in a socket, the circuit will be in closed relation.

Asj shown the lateral extension 13 is provided with the'ears 13 fitted against the i'lat face of the body or core 4 and perforated as at 14 to receive the hollow rivets 15. 'These hollow vrivets are embedded in the mass of the body 4 and their inner ends are expanded'the'rei'n tb'hold them in place `while if necessar said body' is in a plastic or comparative y plastic condition. The rivets project .from the flat upper face of the body 'andi 'extend through the perforations 14 and are headed over the ears 13 to hold A1-0. as will be understood, is insuthe contact 10 Securely in. position. This rom the-shell 5. y s

'p ember 3 comprises the cap l 1, 7,-whi ch following the cus.' made 'of insulating material. ody'fflz are connected termiiation therewith of the fconr. rf-w resl20an'd 21. The terminals vvecontacts22 and 23 respec c ir'e'lat-ive ,withV the spring v.coritacts forinterlocking them-to 1guard against' their aecidentals'eparatlon. n the present case both-the contacts 23' aire interlocked wthfthe' lcoperatingnncontacts 9 and `10.

, resi-lien contactsandjp are furnished which ho areformed -by slitting or d contacts near their free d .slots "2 5 in "the contacts 22 and n] win-be ala sewn-es 2o and is Vseparat'eved; from vthev base member2 as shownsby vdotted lines in Fig. 1 and that it is.dQsi-redto'connectthe two' arts as shown in slaid view. oraccomplish t isV particular-"purpose .the contacts 22 and v 23- illl-fbe* introduced into the passages `7 .and-'8 and :moved therealong until the free 'ends of thecontacts- 22 and 23 ,strike the 9 -lianving provision for ythe v y v I .ydo'fvnot"I elyupon themere en- ,gagement `fthecontacts 4but providemeans freeends,with-projections as 24 the 'stock outwardly..

ltachment of .the two -members of the appliance. 1

The bod has at its upper end the cavity or' counter ore 30 intersected by the openings 7 and 8 into whichy itwill be remembered the resilient contactvportions 23 are introduced. ,The contacts 22'and 23 as they approach the body or core member 4 initially at their free ends enter this counterbore or cavity which thus insures proper passage of said eontacts'into the openingsA and 8.

What I claim is:

1. An electrical attachment plug comprising an insulating body, a contact shell surrounding the body and provided withva flange bearing against an end of the body',

contacts inthe body provided with lateral' extensions, one of the lateral extensions'v being fitted against said flange to thus put lthe two into electrical connection, the other lat- "eral extension and its contact being insulated from said shell, and rivets molded vinto the body and extending through both l ,fiange and the other being fitted against an end of tlfe'body to connect one contact electrically with the shell and to insulate the other therefrom, and two pairs ofI rivets molded into the lbody, one pair of rivets ex tendingthrough the terminal portions of one extension and the other pair-of rivets through the other" extension at the terminals of the latter, the ,rivets being headed over the respective extensions.

' -Inftestimony whereof I affix my signature in the' presencel of two witnesses.

n 'JOHANN G. PETERSON.

Witnesses: i I l L. L. Manner., ,Y

HEATH SUTHERLAND. y

extending through the .flange andalso

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