US1215611A - Spark-plug. - Google Patents

Description

37. EUGGESS.

SPARK PLUG. APPLICATION men APR. 19, ma.

UNITED STATES PATENT OFFICE.

DAVID L. BOGGESS, OF LIBERTY, MISSOURI.

SPARK-PLUG.

Application :tiled April 19, 1916.

To all yir/tom t may concern.' l

'lie it lt'nown that I` llvvm L. Boneless, a

eitizeu ot the United States. residing at Liberty, in the county of Clay and State of Missouri, have invented eertain new and useful Improveuufnts in Spark-Plugs, of whieh the tollowiui,r is a speeilieatiou. reiereure beine' had to the accompanying drawings.

This inveutitm relates to spark plugs sueh as are used on internal combustion engines, and the general olljeet ot the invention is the provision ol av spar'lt' plug whieh is so ronstrueted that the insulating eore may he readily removed t'rom the bushing` without theueeessitvv ol applyiin;- a wreurh thereto, my invention providin"y l'or readily. duielily and easily diseonneetint' the insulatin;` eore and its ,base from the bushing in less than one-third of the time rei'piired with ordinary spark plugs where a wreneh has to be used.

A Jfurther objeet ot' the invention is the provision ot' a. spark plug wherein the base Supporting' the eore 'is eonneetedto the bushing. hyjba-iyonetjoints, and the provision in eonueotion with the base ol a lateh holding the hase from accidental disengagen'ient 'trom-'the bushing'.

`@therobjeets will appear in the course of the following' deseription.

My invention is illustrated in the aecompanying` drawings, wherein:

Figure l is a, view of a sparli' plugr eonstrueted in aeeordanee .with my invention, the bushingand base being' in section;

Figi". 2 is an elevation ofthe spark plug shown in Figli. l:

Fig'. El is an elevation ot' the upper portion ol the bushing;

Fig. l is a top plan view of the base 1l; and Fig. 5 is a top plan view of the bushing.

Referring to these figures, it will be seen that, as usual, the insulating core, designated l() and which may he made of porcelain or other suitable material of like in- Sulating properties,y is disposed within and rigidly connected to a eollar or base, designated ll, which is flanged as at 12. The bushing 13 is provided with the usual manysided head 14 whereby a wrench may be applied to it and the bushing is screw threaded, as at l5, for engagement with the Wall of the cylinder. are eonneeted to this bushing. Disposed Specification of Letters Patent.

Any `suitable electrodes 16- Patented Feb. 13,

serial No. $2.253.

within the core l() is the usual eleetrode 17 which passes through the upper end ot the eore and hasl eonneeted thereto the binding nurl le' whereby the eleetrode li' may he corr neeted to a souree ot' elwtrieity.

ln spark plugs as ordinarily eonstrueted, the base l1 is threaded within the bushing lil and in order to remove thel spark plug' r wrench must be applied to the base and the hase rotated. This olten dillieult lneeause the base has beeoine set within the hashing, and 'turtherinore. it takes more or time to remove and replace the sparlv' plug. lu. order to obviale these ini-onvenienees, i torni the upstandingl' wall lil of the bushing` with a plurality ot uniformly spared bayonet slots 2l). the entranee ends ol these slots exten/l `iupY downward and at an ineliuation to the axis ol the lmshing and then extending al. right angles to the axis. I have illustrated three ol these bayonet slots' disposed equr distantl'v, but a greater number may he used it desired, or a less number. The base il is provided with a plurality of outwardly pro jeeting` pins 2i spared elpiidistautly so that they may be inserted in the entrance ends ot the bayonet slots and then the base rotated so as to carry these pins into the closed ends ot the bayonet slots in which position the -base is lot-lied Jfrom upward movement.

In order to hold the base in engagement with the bushing and prevent accidental rotation ot' the base whieh would tend to carry the pins 21 out of the slots 20g] pret erably 'torni the upstanding wall il) ot the bushing with a plurality ot' vertical slots "'7 there beingr one of these. lvertical slots disposed iu connection with eaeh bayonet slot. The l'lange l2 of the base is also notehed or grooved at one point, as at 23, and mounted upon the upper face of the flange a spring 24 having,r an angular end whieh extends downward tln'ough the slot Q3 and projects down below the unlos` he littingA of 'the core and base out of en1 gage/infant with the bushine.

lt is to be Yunderstood that the bases are to be made in standard sizes to hold any standard porcelain core, and that the bushings are also to be made in standard sizes. The slots 22 are equidistantly spaced so that the pins on the base l1 will Ht in any 'et the slots and thus eliminate the necessity of carefully adjust-ing the base l1. .By using this'bayonet joint connection no threads :ire needed in the plug' or the base. The base is to be formed with the pins 21 by casting the pins thereon'and the slots are preferably formed when the bushing' is east. lilith small ears, the bushing and base would only he formed 'with relatively small slots; and pins and the larger the engine the larger will be the pins and the slots. The spring may be riveted or otherwise connected to the base, as may be found moet desirable,

l'laving described the invention, what I claim is:

l. ln a spark plug, a bushing having an upstanding wall formed with bayonet und with vertical slots between the bayonet slots, a Core supporting base having pins engageable in said sietes and a spring detent engagenble in any one et the vertical slots to prevent the reverse rotationof the base with relation to the bushinv.

2. ln a spark plee' a bushing having' an '2:19 upstanding wall toi-ined with bayonet slots? the entrance ends of the slots being; inelined to the axis oi" the bushingj said tween the bayonet slots being formed -`with vertical slots, a core supporting base having a flange, the periphery of the flange being notched at one point, and a spring attached to the tace ot the flange and having un angular terminal end projecting down through said noteh and adapted to be engagged in any one ot the vertical notches in the wall ot' the bushing, the spring beingprovided with means whereby it .may b lifted.

ln testimony whereoiC I hereunto aiix my signature in the presence of two witnesses.

DAVID L. BOGGESS.

Witnesses:

TRIGG L. NUTTER, EDGAR N. Doen.

Images