US1789595A - Spark-plug gasket - Google Patents

Description

Patented Jan. 20, 1931 'The present'inventionrelatesltogimprovments in gaskets.- and; resides Vparticularly,in v4the provision of animproved' sparkglplug gasket which 1 isV preferably formed entirely of sheetmetal:

vvIt is onefofvv present inventio'nito'` providefa spark-.plug

gasket preferably entirely' metallic,fi-fand capable of I convenient Adistortion thereof vWithout fracture gtocon'form lto-irreg'.ularil ties-inthe procelainfcoresorzin 'the metal casing #and `retainingv Y-nutfifo'f; vsparkfplugsandy to therebyformv a better seal;

Y Another: obj ect yof .f the presentv yinvention resides-inthe. provision of aspark plug gas# Fketl formed entirely.cof"a metal sheet,A the fus'ual asbestos giillerg; orfeore". commonly employed in gaskets of this typeybeing eliminated-.1.-. f It is aA furtherzrobj ect of the presentI invenl plugs ha/ving. f a iz hollow 'core which' permits ftli'e f 1Qas'k`et lto assume j'any-fdesired shape Y as defined by the contour of the'. metal. oasing, retaining nut,'or pm'cela'in`v core of ay spark lf 1 Still-another object-'hof this invention 1s to provide a spark' plugg'a'sket which is veflcient o in use, `simple-fin --cons'truction Jfandeinexpen- *304 A, j

f" The foregoingaiidsuchfother objects-and v p A "become" apparent asfthe description?!:proceeds tvill `be more' 'readilyrsiyeto manufacture; 1 if understood'f-rom th'e'following 'sIl iecifclat,ion,` reference "be'rls h' 10. the afccomp'yng drawings; injyhich.

Fig. 1 is jasecti spark plug n employing fthe gaskets vof v this inyention.,- rg@ Fig@ 2 nis- ,aperspective'y yiew of .the imf v.provedspark plugrgasket.

Fig.:` Sis Aa .central sectlonal yiewithrough the coreof the" improvedgasketl j,

- -Fig; 4=is asectionalfviewsimilai tolig. 3,

@showin i Fig. spark pl ti n fito. yprov-ide a'knovel. :gasketv for; spark onal' elevational'yiew offa Fig. 5 iran; enlargedamrticaly sectionaly View' jthrough a fragment-f' oflfthe Vimprc'wed gasket before'- the :enveloping/shell is .rolled v50 l over they corea Fig. 6 1s a similar Vertical sectional;View7 g of a: portion `oiza lspark plug gasket.shov'v'ing the complete assemblythereof, taken' online Fig.y misvaverui "se'cfinaiview {simi-lar ggasketa-@a n f v`Graske't'sfof known construction employed inf spark plugs are commonly provided with 4an 60=- n l asbestos-diller, or if'forinediofone piece,` are fusuall'y ofl'solid construction,- Which lconstruektion prohibits vafleinlate flexing or other dips-v tortion'ofthe gasketsto conformtoztherporee- I i lain core of the` sparkv plugl or,to1 the shell-for 65 'i With the improved-spark pluglgasket, i trated'infthe .accompanying drawing;l the vpro-n visiimfof av novel .hollowv core apermits ready flexing of 'said gaske'wherebythe latter may7 v70.* c onformgor adj ust; itseli to` any irregularities present sin, the porcelain cor'eor other ycontiguous-*Parts oftheeSPk Plug- Referring to the drawing, fthenoyelfspark plug gasket-consists of, anzoutei' yenvelopmg 75 shell 11 pressed or otherwise formed from a annu-lar ring, lformed substantiallygUfsha'ped 1 in `cross section,A haying the. *bottoml 12,'a1r1d" ninncr and 'outer side-'Walls 13 .andylfl substan-BQ tially perpendicular ;to the bottom 12." An ff annular corefl is adapted tb be received 1 vithin this channelshafped shell 11,'said core' also beingforniedof a metal sheet to assume a` v substantially triangular cross section having` 85 its annularedges abutting at the apexofQ-the triangle, as at 16. Theside 1 7 ofl the trianggu-y o :lara-core, opposite the `apexnvis preferably l' i yformed'arcuate inshapel .f f

The core 15 is placed within the shellll p y g lfthe envelopiiii;shell'fof tlegasket i priorfto tli'e'insertion ofthe'core.

.Gushowingfa modiliedsform of the y S ark plug gaskets of this type are par-v ticu arly adapted for use in spark plugs of the type illustratedat 18 in Fig. 1. A's shown,

v two gaskets are inserted in' each spark plug, i say. in the form shown in Fig. 6, one being held between the annular inner seat 19of the shell "21 of the spark plug andthe comple# mental annular seat 22 ofthe porcelain core 23. The other gasket is placed upon the annular outer seat 24 of the porcelain core and a retaining nut 25 is threaded into the `Shell 21 which nut contacts with and impinges upon said upper gasket. When the nut- 25 is tightened a pressure is exerted uponr the gaskets perpendicular thereof tending to flatten or otherwise distort same. Insome instances the distortion may be, if desired, so great as to bring the gaskets tosubstantially the'shape seen in Fig.

The provision of fthe hollow core15 in the gaskets affords convenient distortion thereof without fracture to conform to any irre larities which may be present inthe seating surfaces22 and 24 of the orcelain core 23. The ability of the improve lgasket to distort and thus conform to the'tibregularities of the seating surfaces insus ra perfectV sealing of the joints. Assaid gasket is compressed the Side walls 13 and 14 are urfred inwardly and outwardly respectivelyto abut the side walls of the porcelain core 23 and the shell 21,"the

4,triangular core acting as a filler and otherwise as a reinforcement to distribute, ressuresevenly ontliev seahng portions o the vgasket andtlius prevent fracture thereof.

While cores having various cross'sectional areas may be employed, itis highly preferable that the triangular cross section type be employed, as the gasket is considerably strengthened thereby and will, therefore, re-

tainits shape under normal conditionsk con' siderable pressure lbeing'required to distort same. ,Y 1

`However', if desired agasket of the type such as shown in Figure 7 ma \be employed with similar results. In this orm ofthe i`n` vention the core 27 thereof is preferably folded over upon itself andabutting atl sub-i formed ofa metal sheet having its edges thereof will permit la limited amount of ilex- The enveloping shell 28 employed in this form is similar in cross section to the core 27, this being formed ofk a metal sheet having its edges folded over and around the core 27 until its edges abut, as at 29.

A gasket of this type will'retain a limited c amount of iiexibility which will permit distortion thereof to allow said gasket to conform to the irregularities of the seating surfaces 22 and 24 of the porcelain core 23.

While there are numerous benetsobtainable by employingy the *novel spark plug gaskets described herein, the principal advantage residesr in the abilitvfof the improved kspark plug gasketto conform to distorted seating surfaces, thus compensating for the irregularities in the seating surfaces of the porcelain and thereby preventing injury thereto. l n

While the preferred forms of the invention have been shown and described in the foregoing, it is to be understood that the improved spark plug gasketsfherein disclosed are ca able of'embodying various modiiica- .tions 1n detail structure without departing from the spirit ofthe invention, no r the scope of the appendedclaims.

I claim: 1 l

l 1. A spark lug gasket having, in com-y bination, a split kmetallic core and a split shell-envelo ing said core, the seams lofthe coreand she l being rdisposed .at'non-adjacent points. -v 1 f .f

2. A spark plug asket having, in combination, a split hol ow metallic core and a split shell envelo ing said core, the seams of'.l the core and shel bination, a metallic core of substantially triannular-shaped cross section surrounded by` a shell of krectan ular'-cross section. a f

5. A spark p u y bination,v a meta ic core of` su antia-lly trian ular-shaped cross-section enveloped by a she 1 enga'ng itsbase and apex only.

6. A spar yplug gasket having," in ,combination, a metallic core of substantially triar'gular cross section formeddarcuate at the si e opposite the apex thereof, a shell enveloping said core and engaging the arcuate surface and apex thereof on y. V

` 7. A spark plug gasket having, in com?` bination, a hol ow metallic 'core of substantially triangular cross section, with the walls thereof at its apex'normally spaced apart and a shell of polygonalk cross section enveloping said core, the core and shell having seams positioned at remote points from each other.

gasket having, in com-

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