US996620A - Attachment-plug. - Google Patents

Description

VJ; S. GROSSLBY.

ATTACHMENT PLUG.

APPLIoATloN FILED Nov. 3o, ma.

Patented July 4,' 1911.

INI/Enron ms 'mssl WIYTNESSES:

- To azz-whamimymm:

'- citizen ofthe' United States, residingat 'Sol'- vay, in`the county of New York,` have on s oLvAy, NEW YORK; Af"

Be it known that I, JAMns S.- CRos'SLEY, a

.of Onondaga and State invented new and useful Improvements inv Attac'hn'ient?Plugs y of which the 'following is a specifica-tion. j This invention relates to contact plugs to tion `of 'plug socket, a'second lis used. in electric installations and for electric wiring, and consists ina new construe# composed of a part -tted tothe partcarrying the wire terminals, Vand of spring locking means wherei vwo parts may be connected vtogether or 'disco1n ected, easily and. conveniently without'ftols -or manipulations of special ence numerals 'are used vto indicate the corresponding parts.

partsand'without arranging' the one part in any particular relation tothe other. i

, My invention is -fully illustrated in the rawing herewith vin .which the same reier- 'to'engage and make contact with the contact ring'6 `'when-the parts are,`assembled. This-- clamp is'preferably formed with two parts in this description Figurel 1 is an elevation1 of the plug com- Fig. 4l is a plan :o

Vend', of the plug element. Fig. 5 isa plan said annu are vertical sections ht angles to each other. the bottom or engaging Figs. "2 and 3 substantially sat; 'ri

of the top, or engaging end-'of the cap:A

I Y In the figures lindicates the base, or'plugelement, made of a'nyfsuitablel insulating material, preferably porcelaimand provided" on its lower,-or contact, end with lthe rim ior i margin 2 andthe recessed post'j3, which formthe g roove, or annularichamber, 4. I In groove 1s arranged the contact rlng, or ar contact, 6 secured 1n place and electrically connected 'by the screw or screws 7' tothe usualthreaded outer plug terminal 8,1

":arranged on the"shank 9 bf the base. -In

the recess 11 `formed il the post 3, islar- #ranged a spring contactvof any suitable shape,

ably but firmly ber and through is effected 4between vthe central by lmeans of which the cup `is. detach-"i which electrical connection ,or 'innerf" scket terminal and lone of ythe conductors. As he're; shownthisjspring contact "consists fof .a single piece l14' havmg 'two "or more somewhatl resilient ends 1 5 providedwith the flaring ti s 16, and -formedi with the openingsfor epressions 17 arranged ljsubstantia ly as shown.`- T 'held in place'by the screw 18, whose head 19 forms the central plug" contact. Thisscrew head maybe separated andfns'ulated rangement of the plug vare firm disconnected easlly connected to the, -plug memyond the `nduof the his spring contact is?v with Haring 0F YORK. 4,

Patented any 4, 1911,

usual binding screws are'secured to theV cap respectively bythe securing screws26 and 27, orby other suitable means. Termithe easy introduci-V I' vfrom the threadedjcontactlhy' thetip20 on terminals.. having Vthe i n a'l v24 has the stiff metallic shank 28fproif vided with the -head' 2 9, which -zengages `firmly with the springcontact on the base when the cap isset. in position andpressed home', and the conductors are -thus firmly but detachably secured `to the base. otheror outerwire terminal 25 hasa claw or clamp 30`securedin place n by. screw 26 as showmto engage withthe ring on both` sides; one ofsaid parts, for instance 31,'may

be made of sprmg "metal, for better elecr trical conneetion'.'I

In making my device 'the plug element may first be Y cap connected thereto, merely 'by being l.pressed home'and without any special 'ar'-v arts -with reference vto eachother.. It is o course understood that the conductors are rst connected to the cap bymean's of the binding screws. Or, if deand the: latter then screwed homeintb i sired, the cap and base may irst be connect'- ed the socket, which may be doneV withoutV screwed into the socket andthe v Thevbreaking the connection Vor twisting" the wires. In all y .connected and yet may be either or va pull at an angle.

*Having thus described my inventiom/what l los 1positiens the twopartsof the by a straight pull E 1n's`aid"groove, a s ringtcontact in said' re-k cess having oppose s ring lingers providedtips;` an f notchesfiminedlatel within ``tips, a single outer 'Wire terminal on'theuprier surface of op osed spring fingers to engage the inner wire terminal on the cap, 'and' a verticallyl .extending 'shank on. said central terminal y having ai head adapted to engage with' the notched: fingers to secure'the cap-tothe base, substantially as described and shown.)

outersurfaces of the-ruig, a lcentral 2. In an electrical attachment-plug, the combination with the cap andl'the base of insulating material, a contact ring on the base, a terminal n the cap to engage said ring ,when the parts are assembled, said ter- I minal havngbpposed spring fingers to engage the inner'and outer peripheral surfaces of said ring, a spring contact om the base having opposed cap oppositely name to-this specification in the presence of two subscribing Witnesses.A A l [JAMES S. CROSSLEY. i Witnesses: Y

B. E. SALISBURY, R. PQCOVNTRYY'

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