US919123A - Spark-plug. - Google Patents

Description

J. W. BROWN, JH.

SPARK PLUG.

APPLICATION FILED sEPT,23,190a.

91 9, 1 23 Patented Apr. 20. 1909.

wmmm XM m' ma ffm is en axis 18, end journeled for free rotation 'will be. hereinafter' hilly eet forth and iis illustrnted in the accompanying drawings, in

Vsind its JAMIQS W. llRwN, llt., 0

PATENT OFFICE l" CAMDI'JN, ARKANSAS.

SPARK-PLUG.

Nociones.

`Hpeeitlcet-ion oi Lettera Patent.

Pntouted April 20, lUOll4 Application tiled September 23, 1906. Serial No. 464,803.

fo all whom 'it muy com r'n:

ile it known that l, JAMES W. BnowN, Jr., n citizen of the United Stntee, residui eti' Cellulari, in the county of Ouachita and tete of Arkansas, have inventedcertain new and useful Improvements in Spark Plugs, of which the following is 1i specification.

This invention relates to sparking apparu tus for hydrocarbon engines, or the like, end hns purticnlnr reference to the construction of n spurl( plug, the electrodes of which nre of peeulnir und ndmultiweous construction as Figure l is nn elevation, ertly broken nwny, illustrating a suitable orm of spark plug embodying onef'orm of the' present invention; Fig. 2 is n detail 4nectional view on thel line 2-2 of Fig. 1; Fi 3 is e fra. mentcvy View similar to that of lug. l l, to il ustratc e modified form of the electrodes, end 4 is a View similur to Fig. 3 indicating n still further modification.

- Throughout the following detail dese`l'iption und on the accom ntnying drawings, sirniln'r parts are referre( to. by similurreleronce. characters.

ln cnrryiug out'this 4invention en'd with pnrticulnr reference to Figs. l and 9 10 indientce n metallic bushing adopted to be connected by means of screwrthreads 11 to'im ordinary type of explosive' engine (not shown). Extending longitudinally thmug'h seid bushing is nu insulated sleeve i2, mede of porcelnin or the like,l und within seid sleevcis n niet-allie stein 13, at the upper end of which is e bindin fnutdli'for attachment of one terminal of tlie electric circuit.' The lower or inner end of seid stem 13 isprovided in nny suitable nnmner with ii-:short exis 15 which extends et any suitable angle, preferably n right angle, to the inuin exis of the stem i3 mid s nrk vplug es n. Whole.v Journnled for rotation upon seid zshort axis 15 is n hutten-shaped electrode 16. This electrode of thick, heavy metal at its hub or center,

peri heryis circulairend intheforinV of a kniee e 1 7. 1-

Located it( jacent to the inner terminal of the stein 13 'and the electrode 16 and supported in o1; to the imerend of the bushing on eaid axis18,is n second electrode 19, similar in size and form to the aforesaid electrode lli. Ae illustrated in these hgnrw rho umm 0f tli elffCtiOtlQS lli riitl lil uri: ili.-ip0;1i'l Hull staintielly ut rivht nngl` in mul. other :nul consequently tie pinnen oi' the elmirodw` jonrnuled thereon intersect ench other liv this arrangement those perilous nl' tlnele:-H

other are practically points, insnrinr; :i #lmnp hot-Spark. A prin'niry purpose in forming the eectrodes of heavy lnntcrinl nz: illnetreted is to provide for nn ini-cnninlntion oi' n heavy charge el' electricity adjacent to tin` sparking points. The elcctrodele, journnlerl es indicated, will be cruised, h3v the vihrntion of the engine and the rush of ,enses to nud from the spark plug, to roinie on their nxes, whereby de 'iosition of sont thereon mid which woulf tend lo interfere. with proper sparkingr or to conse short eircuiiing, will he -prevented, und furthermore the rolntion oi theelectrodes will insure the presentation ol' fresh Contact surfe-ces or pointe` for the. free transfer of the electric spark,

In the construction illustra-ted in 3 the essentiel features are similnr to those previously described. In this construction the seme form of bushing 10, sleeve l2, stein 13, and electrode 16, are crnl'iloycdns in the. previous instance. The support iS secured 1n the inner end of the bushingl i() diici.;

A' from theeorresponding clement cbm-fc der scribed in being disposed substantially pnrellel to the axis 1.5, und the electrode 19 journaied on isitidV axis 18' is spooilshfipcd or inthe form of a double cone, the knife ed c V 17 of the electrode 1G extending within tile V-groove of said electrode. 19' end is space-d llt a. definite distance therefrom. i

i In Fig. 4 is illustrnted a. slightly differentV modiiieetion wherein the electrode 16 is sup-` ported its in the previous cnscsr, for free rotti,- tion upon the'nxis at ,right singles tothe main stem 13 and main exisof the spark p'1ug,-but the op )osite or negative eleetrode-i-m the form o .e stationery point 20 secured and `supported upollthe mner end of the bush' l1'() so as to preent its oint at a definite fixed distance from the kni e edge 17 of the rota-ry electrode. p In this 'construction .the elee. trodeZ oomprisesran enlarged heed for the accumulation of` a heavy charge of eleetricity.

Having thus set forth the characteristic features of this invention, but without desiring to be limited except es required by the said electrode, and a second electrode'joursha ed electrode journaied or rotation on state of the art and the laims hereinafter made, what I claim and desire to secure by 1 Letters Patent of the United States, is:

l. In a spark 1plug` the combination of a bushing, an insu ate sleeve therein, a oontact stem extending through the sleeve, the stern having a short axis at an angle to the main axis 'of the stem and lug, a buttonsha ed elec-trede journaled lor rotation on sai angularly disposed axis of the stem, and another electrode sup orted 'upon said bushing and spaced at a Lxed distance from the edge of the rotary' electrode aforesaid.

2. In a spark lug, the combination ofa bushing, an insu ated sleeve therein, acontaet stem extending through the sleeve, the stem having a `short aids at an angle to the niain ofthe stern and lug', a buttonsai angolari?7 disposed axis of .the stem and havinga kni e edge, a. transversely` disposed axis supported-by the bushing proximate to naled u 'on said axis and thereby spaced at a fixed istanee from the {irst electrode.

3. In a spark lug, the combination of a bushing, an insu ated sleeve therein, a oontaet stein extending through the sleeve, the stem having a short axis at an angle to the main axis of' the stem and lng, a buttonsha ed eleetrode journaled or rotation on sai angular-l disposed axis of the stem and Vhaving a 1mi e edge, an axis disposed atan angle to said' first rnentioned axis' and supportedb said bushlng, and a second button- `shag'd e eetrode journaled on said last nientioned axis and havin a knife edge in a plane at an angle to the p ane of the edge of the {ilst velectrode and ,spaced at a definite distance therefrom.

In testimony whereof I afix my signature in presence. of two witnesses.

JAMES W. BROWN, Jn. Witnesses:

LUCY Mmmm, G. W. BnowN.,

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