US960752A - Spark-plug for explosive-engines. - Google Patents

Description

J. 1 WHITE. SPARK PLUG FOR EXPLOSIVE ENGINES.

APPLICATION PILED MA Y11, 1909.

960,752. Patented June 7, 1910.

. Invenrar purl-En srntrns PATENT OFFICE.

JOSERH P. WHITE, OF SAVANNAH, GEORGIA, ASSIGNOR OF ONE-HALF T ALEXANDER I P. SOLOMONfOF- SAVANNAH, GEORGIA.

SPARK-PLUG son EXPLOSIVE-ENGINESi.

To all'whom it may-concern:

Be it known that I, JosnrH P. Wnrrn,

, a citizen of the United States, residing at useful Improvements in Spark-Flu spark and consequently Savannah, in the county of State of Georgia, have invented new and for Explosive-Engines, of which the fol owing of this class whereby the presence of foul or exploded gas about the plug terminals is prevented, he strength of the explosions the power of the engine is increased and uniformitylin the strength of the explosions and consequent smooth or.

even running of the engine is insured.

A further object of the invention is to provide spark plugs of this class with a port or passage which leads from the cavity therein and into a device that is preferably located on the exterior of the plug and performs the dual function of mufiling the gas stance that may escaping from the cavity of'tlie plug at each explosion of the engine and also for cooling such gases sufficiently to prevent their igniting any gasolene or ot-herinfiammable sub be in proximity to the plng,

. this device in the 'present instance being on the line 3-3 of Fig.2;

sists in certain improvements, tions and arrangements of parts,

capable of adjustment whereby the amount of gas escaping from the port or passage of t e plugrnay be varied in order to insure thebest results.

To these and other ends, the invention con all as will be hereinafter more full described, the novel features being poin in the claims at the end of the specification. In the accompanying drawing: Fi re 1 is a view partly in elevation and 'par ly in section of a spark tion of the cylin' er head to which the plug is applied being shown; Fig. 2 represents anexterior view of the i iproved plug;

Fi 3 represents a transverse section of the-p n Fig. 4 is a detailview of the'threaded. socket section of the plug showing the escape passageand chan- Specification of Letters Batent.

Chat/ham and relates to improvea smooth and even Furthermore, in order to avoid any no se due-t'o"theescape of the gases at high presjo'r explosion,

and combine out particularly plug constructed in accordance with m present invention, a por- In the present instance,

Patented June '1, 1910.

Application filed may 11 1909." Serial no. 495,291,

nel; and Fig. 5 is a detail view of the part which regulates the escape of gas through the escape passage or port and the channel. Similar arts are designated by the same reference characters in the several views.

According tothe present invention, I provide means for venting the consumed or foul gases from the cavity of the plug and from the zone surroundingthe electrodes or terminals of the plug whereby the fresh gas entering the cylinder may also envelop the terminals of the plug and an instantaneous, perfect or complete ignition of such gases is produced at every impulse of the engine. Owing to the complete combustion of such gases, there is no deposit of carbon or soot, the greatest power is developed by the'explosions owing'to the complete and and the explo-. mom will be uniform in strength, insuringinstantaneousvcombustion,

running of the engine.

sure from the explosion zone at each impulse and also to prevent the ignition; of anycombustible substance that may .be in the vicinity of the plug, I provide a devicewhich performsthe dual function of expandin such escaping gas until the noise is reduce to a minimum or, in other Words, itis muffled and at the same time such gases are sufiiciently cooled before escaping as'to prevent the ignition of gasolene orany other combustible or inflammable substance the plug terminals beingalso kept cool in this manner.

Various constructions may be adopted in carrying the invention into effect and while I have shown in the accompanying drawiug a construction that is generally preferable and is capable. of accomplishing the desired results satisfactorily, it willrb'e understood that I have shown such form of the invention merely as an example, and that certain modifications and changes may bemade which will be'included within the scope ofthe claims at the end of the specification.

1' designates the wall of the explosion-chamber into which the plug is inserted, it being usually the head of the engine cylinder and it is customary to thread the plugs into such head. The invention -in the present instance is shown applied to a plug of the generally well known type, it comprising asoclget secexplosion chamber, and an insulating core- 3 usually of porcelain or mica which has a gas-tight fit within the socket section 2 and --.1s secured therein by the nut 4, the core 3' carrying the central terminal or electrode 5 while the socket section usually carries the grounded terminal or electrode 6, a cavity 7 of more or less extent being usually formed within the walls and at the inner end of the socket section.

In the present embodiment of the invention, I provide a port or passage 8 which leads from the interior of the socket section or from thecavitytherein and to ortoward the exterior of the plug, this passage in the present instance extending in a direction diagonally upward and outward so as to bring its upper end above the threaded portion of the socket section of the plug. This port 'or passage 8 leads to a gas-expanding passage 9 which in'the present instance starts at the outlet end of the port 8 and then extends around the exterior of the plug in a circumferential direction. Before this passage thus extended reaches the outlet end of the port 8, it has an offset 10 formed therein,

the assage being then prolonged for a suitable distance whereby it may be of a length suflicient to expand the incandescent gases to such'an extent,.as, ,to muiilef them and reduce their temperatures below theignit-io'n point. Thedend llfof this passage in the present instance extends pastthe beginning which receives the gases directly from the port 8. I It is generally preferable to provide means I for varying the degree to which the gases are expanded or mutlled before being 11berated to the atmosphere, and in the present instancefl have shown means for varying the discharge ofthe explodedas from the port 8 to the atmosphere, wring 12being shown in the present instance which fits over that part of the plug section in which the circumferential passage is formed, this surface being preferably cylindrical or at least round in cross -'seetio n so that this ring serves to confine the gases .within the circumferential passage until they reach-the outlet point. This ring in the present instance i s provided with a vent 13 which is arranged to communicate with the end section ll, of the circumferential passage and by properly phaeingithe ring upon the plug section over which it fits, this vent may be so positioned with respect to this end section of the-dis charge passage as to provide an elongated or circuitous passage whiclrthe gases-:imist traverse before venting to the "atmos here. Any suitable means may be provided retainin'g this rin in proper position, it;' beiu,g preferably fitted ti htly on the plug, a screw 14 being tapped through the ring in the present instance, the inner end of this screw being preferably pointed or tapered so that cumferential passage and cooperate with the walls thereof to obstruct to different degrees the discharge of the ases without,'however, unduly obstructing t is passage. If so desired, one or more enlarged portions 15'may be formed in the end section of the cireum-- ferential passage at which points the screw may rest without unduly restricting to any material degree the escape of the" gas herethrough.

In practice, the plug is so adjusted that a permanent vent is provided for the escape of a suitable quantity of the exploded gas from the cavity of the plug or the zone surrounding the electrodes betweenqvhichthe spark jumps. At each explosion of the engine, and after the explosion, any consumed or foul gas remaining within the cavity of the plu or within the zone surroundim the termina ls or electrodes of the plug will be vented to the atmosphere and the incoming charge of fresh gas will. thereby enter the cavity'of the plug and also-enter the zone surrounding the terminals. The passing of it may so enter the end portion 11 of the cira the spark between the tei'minals' will therebycause an instantaneous and powerful explosion owing to the presence of the fresh or unfouled ases around them, and as fresh gas surrounds the terminals, powerful explosions of uniform strength are insured,

through the relatively long and circuitous passage before venting to the atmosphere, such gases Wlll be mufilcd so as to render the operation practically noiseless and such' gases when they vent to the atmosphere will be of a relatively low temperature that will be insufiicient to ignite. gasolene or any other inflammable or combustible substancethat may be in the vicinity of the plug. The adjustment provided enables the plu to be set according to the size of the cylin er and to other conditions whereby the; best-results may be obtained in applying the-plug to different engines.

I claim as my invention:

1. A spark plug for explosive engines provided with terminals and having a. re- .stricted vent passage communicating with the ignition zone of its terminals and a relatively larger gas expanding passage to receive the gas from said vent passage and terminating in a restricted outlet, sald passages and outlet being of a size to permit them to remain permanently open to the atgasesfrom said zone during the operation of the engine mosphere to permit discharge of consumed in sai edema. 1 a

2. A spark plugof the class desdribed I provided with terminals and having a cir 'cumferentially extendin gas expanding pas-' sage communicating wit the i' ition zone ofits terminals and capable o expanding such gases tocool them below the lgnition .point before 'phere.

3. A spark plug for explosive, Lengines havin a cavity therein and terminals withexpelling. them to the atmo's stricted vent passage lead ng from said cavity, a circumferentially e gated and enlar ed passage and a restricted outlet there or, said passages and outlet being'of a size and shape to mufii'e the escaping gases 'and reducing their temperature below the ignition point, and a"regu lating device for varyi the obstruction ofiered to such gases by sai passages; ,l

' 4; A spark plug. for e: losive' engines provided with terminals arid having a vent passage "communicating with the ignition mg the gas from said vent passage and reduein its. temperaturebelow 'the ignition" point hefore issuing to the atmosphere;

5. A spark plug of the class' described haYl, I a portion provided with a ing from said cavity.

6. A spark plug of the class descrihed provided with terminals and having'a tortuous passage provided withganofiset lead ing from the ignition zone 9f its terminals said passage terminating an a permanently open restricted outlet.

7. A spark lug of the classdescribed comprising a portion provided with a cavity and terminals adjacent thereto, said portion having .a' circuitous passage which leads from said cavity and 1s elongated'in a direction peripherally of said portion.

cavity, the plug also a, re-- expanding] passage zone ofits terminals, and also having a peripherally extending passage for rece1vdifferent degrees the passage having a cavity and terminals adjacent thereto, said plug also having a vent pasnating in a restricted outlet, and a mufiling device having means at'a oint intermediate its length for varying t e obstruction of said passage which the gases .musttraverse before passing to the atmosphere.

provided with terminals and having a vent passage communicating with the ignition zone of its terminals and also having agasextending. circumferentially roof, and a member having an outlet to communicate'with said circumferential passage, said member being provided gasto said outlet from the circumferential P a I 10i A spark .plug having a vent passage ,and a roove leading from the vent passage, and a and or sleeve .covering said groove and-provided with an outlet to receive the exploded. gas discharging through said groove.- j

11. A s ark lu havin a vent assa e leading fr dmit' s in terior a id also h ving a groove leading. from the-vent passage and elongated uponthe periphery of the plug,

."a sleeve'l'fixed tothe exterior of the plug having a'circuitouspassage 'le and forming a covering for said-groove,

'ploded gas discharging through the groove, and a set-screw adapted toproject laterally into said groove and thereby. obstruct to (of gas there-. through. v

In testimony whereof I have hereunto set nesses.

8. A spark plug for explosive engines JIW. Por'rmmss.

sage leading from 'saidmavity and .termir. I

9. A spark lug of the*class described with a rotatable part to adjust the flow of said sleeve having a vent to receive the ex my hand in presence of two subseribing. wit- Jossrnr, a a

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