US1579060A - Spark plug - Google Patents

Description

arch 30 1926.

SFARK PLUG Filed May 21 1925 V r 4=====I NVENTORs, y/1024s.

A TO EY.

Patented Mar. 30, 192 6. i a

f P umrlzo sT rssv JESSE w; BAnnE's'AND THOMAS c. REYNOLDS, or onnon'rzi, nn wfyonxi 3 SPARK PLUG.

Application filed m 21, 192 5.;jsefia1-na al-@713- T at whom may conce flw Be it known that we, Jnssn BAnnnsand THO AS C; REYNO S, citizens of lthe United State's,residing' at Oneonta," ini-the 5. county of Otsego "and State of New York,"

have invented certain new and useful Im provements in Spark Plugs, of. which the following is a: specification.

This invention relates to spark plugs and has for its object to provide, in-a manner as, hereinafter set forth, a plug of such class, having'means whereby, ser es of 1ntensified sparks arepro'duced toinsure proper ignition and explosion of the e'xplos ve mixturesupp-lied to the combustion chamberof an internal combustion engine. I

A further object of the invention is to provide, n r a' manner as hereinafter set,

, forth, a spark plug with means to form a 2 plurality of sparking points capable of producing .what may be termed a, multiple spark,-thereby insuring a more perfect explosion of the gases and increasing the a 7 power produced as the result thereofwin the sense that as the exploslon 1s moreperfect, less gas is consumed, and the engine" more .easily cleaned, thereby increasing its efli- -ciency. g A further object of the invention is to :provide, in] a manner as hereinafter set forth, a spark plug/provided with a combustion chamber, so arranged with respect *to the means for producing multiple sparks whereby when ignition takes place the gas in the plug will-blowjpast said means to,j

clean. off any" accumulation of carbon f or other fouling substances, under a such conditions keeping the, said meansalways clean and overcoming fouling of thefplug. i

v Further objects of the invention are to provide, in a manner as hereinafter set forth, a spark plug forthe purpose referred ,to, which is simple in its construction and arrangement, vstrong, durable, thoroughly efficient in its use, readily assembled, and

comparatively inexpensive ,to manufacture. With the. foregoing andother objects in view, theJi-nvention consists of the novel construction, combination and arrangement 3 of parts, as; hereinafter more specifically de-I scribed and-illustrated in the accompanying drawings, wherein is shown an ,embodi-;

ment ,of-the invention, butit is to lbe under?- 1 stood that changes, variations andimodifi-s characters denote corresponding ;pa'1:'ts i throughout the severalviews:-, a a

I F igure 11s. a vertlcl sectional View of a spark plug, in accordance w1th'this invention'.

Figure 2 is aninner end view thereof,

Figure '3is a section on line 3-3, Figure 1. Referring to the drawings in';.detail,"-1 denotes a metallicshell, 2 a porcelain plug body I having embedded therein and tended therefrom a-central electrode 3, and

4 indicates a packing gland'for -detachably connecting the-plug bodya2 to theyshell 1. Interposed between the plugbody 2 and the shell 1, intermediate the ends of said plug and shell, 1s a gasket 5,,which seatslona shoulder 6 aIT ng d 0n ,thc'inner face of .the shell 1, andsaid gasket is engaged by the plug body 2 xvhen the latter is coupled in operatlve 'posltion within the shell lby that theinner face of the shell 1,; at the inner terminalfportion thereof is provided with" threads 7.

Threadedlyengaging witli the inner nd a of the shell 1, as well as projecting therefrom,f1s,a carrier formed ofiinsulatiomsuch as porcelai-n and which isreferred to generouter diameter is indicated at 9. and the-portion of greater outer diameter is indicated the gland 4Q Theforegoing elements are of known construction itlrthe, exception ssz at 10. Theforming of thebody of the of said shell.

. carrier Sof two differentfouter:diameters provides an. annular peripheral shoulder 11, which when thecarrier is mounted in position 1 with respect to the inner end of the shell ,1 V abuts against the inner end edge, of the she'll. r .The periphery of the portionQof; the carrier 8 is threaded for engagement 7 with the threads 7 i of the shellfl, whereby the carrier V is detachablysecured to the inner ie'nd 0f .the latter andwhen inoperativefposition the shoulder 11 abuts against the innerend rier, as indicated at 12, 13. The flare of the portion13 is greater than the flare of the portion 12. Thatend of the carrier 8, arranged within the shell 1, in connection with the enlarged intermediate portion of the plug body 2, provides a combustion chamber lei and the oppositely flared opening formed by the carrier constitutes what may be termed a passage for said chamber to permit ofthe entrance and discharge of a portion of the explosive mixture.

Embedded in the carr1er 8 s aground electrode 1.5 which extends across the openin'g inthefearri'er'at the outer end thereof and which-also is exposed at the shoulder 11 so as to have electricalcontact with the inner end edge of the shell 1. The portion of the electrode 15 which-extends across theopening at the outer end of the carrier 8'is indi cated at 16. Embedded in the carrier 8 and extending across the opening at the outer end of'the latter is a series of auxiliary electrodes 17,18, 19 and 20. The portions'of the'electrodes 17, 18, 19 and20 which extend across the outer end'of the opening or, pa sage formed in; the carrierfi, are lndlcated at 21, 22,23 'and24t respectively. The electrode 21 is extended through the carrier 8 for a portion oi its length and extends" into the vides aspark' gap, the portion 2201 the electrode 18, in connection with the portion 23 of the electrode 19 provides":u spark gap, theportion 2'3 oftheelectrode 19 inconnection With the portion 2403i the electrode '20 provides a -spark gap, and thep'ortio n '24 of the electrode 20 in connection with the 'bustion chamber allows the plug to clean portion 16 of the electrode 15 provides a spark gap. I

The providing of the plug with the com itself and prevents fouling of'the portions or the electrodes which extend across the 'outerend of the carrier 8 when each explo slon takes place. The passage to the coinbu'stion chamber is restricted, which -increases the ability at the time of the explosion to'clean the plug and to prevent fouling of the auxiliary electrodes. hen the explosive 'mixtuie is supplied-to the engine V "der, said reduced port1on adapted to have cylinder a portion'thereof will pass the electrodes 15,17, 18, 19 and 20 and enter the combustion chamber lei.

' When, ignition takes place the'portion of the mixture-in the combustion chamber willblow past the el'c'c-' rsraoeo trodes mentioned and clean of? any accumulation of carbon or other fouling substance.

by making a series of sparks,*each of which isfar more intense than the ordinary single spark because of-the various spark gaps or resistance spaces which set up a resistance at the circuit and intensity the ignitibility.

'By increasing the heat of thespark as well The conas the number of sparks, the explosive mix ture. ignites quicker "and more effectively than in'theform of plug now in general use, and under such conditionsan enginecan be operated with a leaner'eXp-losn e mixture than that when aplug with a single sparkis employed.

I It is thought that the many'advantages of a. spark plug, in accordance with this in vention, be readily-,understookfl,'and althoughtl'ie preferred embodiment ofthe invention is sis-illustrated and described, yet it is to be understood that changes in the details of construction can be had which will fall within the scope of thein'vention as claimed) What we claim is 1. A spark plug comprising a holliwi car rier adapted to be connected to and within and further project from the inner end of the shell of the plug,said carrier forming a passage itor the reception of'the inner terminal portion of the central electrode of the plug andprovided with'a series of V opposed, spaced electrodes extending across the inner end of said passage, one ofsaid electrodes extending partly throughone side of the body of the'carrier'lengthwise thereof and projecting'i-nto said passage, intermedi ate its ends, toa point in close proximity the plug,' and associated therewith, and another'or' said electrodes extendingpartly through the other side of said body of the carrier-lengthwisethereof and having an exposed terminal for contact with the inner end edge of the shell'oii the plug.

2, 'A sparkplug comprising a hollow carrier provided with. a peripherally threaded reduced portion forming a peripheral shoulthreaded engagement with the inner face at the inner terminal portion of the shell of the plug to secure the carrier to the'shell and to provide for the abutting'oftheshoulder to the inner end 'o'fthe central electrode of against the inner end edge of the shell, said carrier forming a passage for the reception of the inner terminal portion of the central electrode of the plug and'provided with a series of opposed, spaced electrodes extending transversely across the inner end of said passage, one of said electrodesihaving an" extension extending partly through one side of the body of the carrier lengthwise thereof and projecting into said opening, intermedi- "ate its ends, to a point in close proximity to the inner end of the central electrode of the plug and associated therewith and another of said electrodes of said series 113V.

ing an extension extending partly through the other side of the body of the carrier lengthwise thereof-and having ,an' exposed terminal at said shoulder in-contact with the inner end edge of the shell of the plug.

3. A spark plug comprising a peripherally" shouldered hollow carrier adaptedto extend 7 into, besecured directly within and project from the inner end of the shell of the plug and further having its shoulder abutting against the inner end edge of saidshell, said carrier forming a passage into which is 7 adapted to extend the central electrode of the plug, a series of spaced opposed electrodes extending across the inner end of said passage, one of said electrodes havinga' terminal thereof exposed at said shoulder for direct contact with the inner end edge of the shell and another of said electrodes having a terminal portion thereof projecting through the. wall of and into said passage and associated with the inner endof 1' the central "electrode of the plug;

4:. A'spark plug comprising a. h110w'car'-* rier adapted to be secured directly within 7 4o and project fromthe inner end of the shell ofthe plug, saidcarrier forming a passage for the reception of the inner end terminal portion of the central electrode of the plug,

a series of opposed, spaced electrodes vextending transversely across the free end of said carrier, the inner electrodes of said series having their ends embedded in the; i-

free. end edge of the carriers, each outer j electrode of said .series p-rovidedf'with an extension, one end of -each of said outer electrodes embedded in the free endedge of said carrier, one of said extensions extending partly through one side Of-SELld carrier and projecting through thewall. of and into said passage and associated with the inner end of the central electrode of the plug, the

other of said extensions extending length wise through a part of the other side of said carrier and exposed at the periphery of I

Images