US980723A - Spark-plug. - Google Patents

Description

P. M. WILSON.

SPARK PLUG.

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.23123 M. WILSON. .QF PRQIDENCE. KRHODE ISLAD. ASSLGNOR OF .ONE-HALF T ,AFLES M. B. TAYLDB, 0F PROVlDEliC-, .RHODE ISLAND. Y

'SPARK-PLUG.

Specification of Letters Patent.

Animation and september 24,1909. serial No. mams.

To auwmnrimay eoncern:

Be it known that l. Pn'rizn M'inson. n Citizen of the 'United tirate-s, residing' at Providence. in the county of 1rovidenee and Starte of Rhode lala-nd. have invented new and usefulY improvements in .imrklllugs.

-of Which-the ollffivingfis a\--npecifieation.

This inventionrelater to nnl'irovenients in eleeti'ie parking devicespartienlarly spark ning: for iisefor j ftiiting the explosive 1n `the cylinders in internal combustion engines andthe smid invention consists in the cenitrnction. combination and arrangement of devires hereinafter shown and described,

-One ohjeet oil the present invention is to effect improve1nent V in the construction and arrangement of the eleetrodea` or sparking points so as to prt-'rent short-eirenitingV 'o v the accumulation of soot, or carbon around Sparliing points.

A further object to prevent the insulator for the central conductor from becoming saturated and injured` A further object is to etieet improvements in means for atta 'n g the electrical eonneftions to the ventral condnvtor.

in the acompa fing drawings. Figure 1 a vertical longitudinal central sectional view of a Spark ping consti-tiered in aerox-ih ance -with the invention. Figs. 2. I3 4. and 5 are detail views.

in accordance with my invention I pro vide a shell or eaing l which is made of iron. steel or other conducting metal and has an extcriorlv threaded portion 2 ahich is adapted to he :.f-rewed in a threaded opening in the c vindcr head of an engine to 5ecnre the Shell or easing' thereto. Said Ashell or Casin;r alan has an exterior angular portion I), adapted to he engaged and turned hv a wrench and the outer portion-of the said shell is provided with interior screw threads 4, the :hell having an inclined annular shoulder 5 at the inner end ot' Said interiorlv threaded portion -l and an annular shoulder (i .vhieh is presented toward and spaced froin the exposed or inner end of the shell.

`The central conductor or inner eonductor 'a' is ineaned i` and extendlongitudinally from end to end of an in nlator S which inzulator provided with an annular (firmanferenlial llange J at a uitahlo di tance from its inner end. said tlange presenting oppositelv iin-lined or heveled a'nrfaces 10. 11.- collar 152 which may he inade of copper or i l i i l l i other suitable material is spaced between the Shoulder i o'f theehell and the inclined face 1() .off the flange of rthe insulator 8. a sleeve 13 'which i `screw-ed in the threaded portion 4 of the shell hearing*r at ita. inner end against the said flange J and SenfiingY to firmly hold the insulator in 'ivtlaee in the Vnhell. The inner end o'l' the said sleeve 13 is iared no that the Sleeve presente' hut a comparatively Slight enrt'm'e which heaixV againei the {langtll of the ineulator e and hence excessive pressure on the inenlator is prevented when the sleeve expande; h v the heat to which it is e'uhieeted when the devine ie in une. The inner or central vonrinetor T is provided with a sparking point or electrode which is Y\ho\vn an a `-erexv H the head of which hears against the inner end of the conductor T and is provided with a eentnli rear," which reeeiwehA a stud l5 that proie-lifts` front aid inner conductor.

The exponer). end of the shell is closed by an insulator cap i6 which hear.c against the shoulder tl and has a threaded central openingr engaged hv the electrode l-i and through which the latter extends.

(ln the unter side of the insulator cap is the outer eleetrfxle l? which is a dish of Steel or other suitable material and forms a covering for me insulator cap i5 which closes the exposed end of the nhell. said electrode dink having' a central opening through which the inner electrode extenlez. :.:aid inner electrode hein!r spaced from the wall of said opening. the. diameter of said opening exceeding that of the exped end of the .said electrode. This liek is held in place by a flange 18 turned or spun. onthe exposed end of the :shell after the insulator cap or closure 1G and the outer electrode (liek have, been placed assembled in the shell. The inner Side of the electrode disk is hollovrcd as at 19 so that the inner face of said electrode disk is slightly spaced from the insulator cap or closure 1G except ai; the periphery of the electrode disk where the Same is formed with a Harige :20

Patented Jan. 3, i911.

that hears against the insulator cap orL t elohnre and protects the latter from hot oil or similar substance which may be thrown against the saine duinqr the operation of the engine. and it will he also under-bloodthat the closure cap or insulator 16 prevents the poseibility of any hot oil or subetance being hroueht. in Contact with the inner insulator S so that the hitter is prevented from lfeeoinully ennliloyed for making insulators for de g vices of this type.

In pine-tice the eleetrode: 14,17 heroine reryliot. due lo thehentol' theeugine und the heut from between theseelectrodes prevents short eireuitiug media from collecting and servee to destroy the Short. eircuiting qualities of residual elements which might tend to collect :it this point. Furthermore the spari: passing hein-een the electrodes serves to remore or destro; :my short cireuiting inedin which muy lend to :uc'i'nnulnte or collent lle.- tween them. The spurl; points do not reA quire adjustment but remain fixed and the )are between them is practically unifarying :ind is not :itleeted h r the expansion und contraction ot' the eleetroflee since it is obvious that. the expnnfion or eonirnetion oi the inner electrode H does not atleet the distance between the latter und me wall ot' the opening in the outer electrode. disk I?, and since.

the expansion undv contraction of the outer electrode disk is distributed throughout the entire surface ot' the laitier and is minimized at its center where the central electrode is exposed. Vapore or moi nre which muy Condense when the engi e is not in operation und settle on the expoxd end of the plug would he distrihuted on the electrode plate in so thin u ihn to he prevented from sinntfeireuitintr the elertrodes :ind owing to the spare l) between ihe electrode digli und the eloenre @ap or insulator lli Suid disk und rlosure eup or inenlznor hy if-plliny notion will prevent :noie-.ture or rupor from condensing on the inner electrode 14 to such un extent :is to render .short-rinzuiing imponsible.

The inenlator S has its outer end reduced in diameter :is at 2] und provided in opposite sides 'with iererxes The metallic oep Q3 which in practice preferably nride of tir-.iss

is formed with a sleeve or shell 24 to lit on the redured portion 21 of the insulator 8, which Vplace on the outer end of the insulator 8 and iu electrical Contact with the. inner conductor T. Seid cup is formed with u screw threaded stem 2G on which operates a bindin nut 27. Either form ot' the clip or electrical connection shown in Figs. 4: und 5 may be secured between the rap und the binding nutl :1e will he undertood.

Haring thus described the invention what is claimed as new is l. An electric sparking device having a shell, an inner conductor having an electrode detachable therefrom and presented :it the exposed end of the shell, an insulntor in the ehell on said inner conductor, :in insulator for the detachable electrode and forming a' closure for the exposed end of the shell, and nn electrode in the exposed end of the 'Shell covering the last nznned insulator and having on opening through Wliieh the inner electrode extends, said inner electrode being spaced troni the wall of Suid opening.

Q. An electric sparking device having a Snell, :in inner conductor having an elect-rode detachable therefrom und presented at the expofed end ot the shell, an insulator in the shell on the Suid inner conductor, an insu-v lator cap in and forming a closure for the expofed end of the shell and having an openingy through which the detachable electrode extentie. snid detnohuhle electrode being $eeure-1l to the s: id insulator cap, end an electrode in the exposed end of the Shell COYering the insulator cup und having an opening through which the inner electrode extends,

#nid will of Suid openinf.

ln teetiinony .shereof I atlix may signature in presence of two witnesses.

PETER M. WILSON.

".Yi'messes:

tiro. L. Coene, Fnomxee l. Ensems.

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