US1451939A - Spark plug - Google Patents

Description

@etented pr. i?, i923..

Applieation tiled .llaclfl will.

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Be it known that l, FRANCIS A. Geenen., a citizen of the United States, sind resident of Chicago, in the county of Cook and State of Illinois, have in'vcio' .ad a certain new and useful improvement in Spark Plugs, of which the following is a full, clear, concise,

and exact description, reference being lied to the accompanying drawings, forming a part of this specification.

My invention relates to spark plugs for -use 1n connection with internal combustion engines, and the principal object of the invention is to provide an entirely satisfactory device of this kindithat is of ru ged construction, that may be economically manufactured, andwhich is so constructed as to CII aord one or more intensiiergeps which are provided by parts-of the lug unit.

Other features of novelty will appear Pis the following detailed description progresses.

In the drewi view of e plug s invention. Y

A represents the integral metal spark plus; siiell,v which comprises the conventional threaded portion l, the flange 2 and hexagonal nut 3. Near its lower end the shell l have shown e. sectional owing the features of my A is provided with an annular beveled v shoulder 4, which co-operates with e corresponding shoulder 5, formed on the insulator B. A gasket 6 is conveniently interposed between shoulders l and 5, as illustrated. The member B may be formed ofI any one of the materials commonly einployed as spark plug insulators. The insulator B is held in position by the externally threaded collar 7, which co-operates with in- .ternal screw threads at the kupper end of shell A. A suitable gasket 8 is preferably interposed between collar 7 and insulator shoulder 9. The sleeve B is formed to provide a pair of recesses -in which electrode members C1, C2 and Cs are intended to o0- operate for the purpose of intensifying the spark. Electrode C1 is threaded in the sleeve 10 imbedded in the insulator sleeve B, and seid electrode terminates witliin revtricity conducting material. the

serial me.

cess l2 sind co-opei; ti'ode C3. Electrode is ed in e sleeve, and tney be sired position by. lee-lt mit CB is provided 'with a slionigrests on tbe upper the centi'al petition ei 'time the web is formed with n oeive the lower portion oi the said lower potion se to receive loclt nut 4:2. is illu trade (32 cooperates with eic-U terminetes in recess "l2-b phere.

Preferably imbedded in the shell, and projecting do' from, is n pin l? of cot which 'lies its ifree end ti gies to the insulated directly under, init spec most portion oi the insulated ele bedded in the insulator E downwardly therefrom is e insuleted electrode-C2 en pin i7. l

ln practice, the members Cf and, adjusted that the gap between tl C1 and CS andthe gap between tlv 'S3 and C2 are substantially eq other, end substantially equal to .ne et the lower portion of tile end lower ends oi the longitudine i in the insulator are eectively ciosed so the sparks passing the two confined derive such benefit as is afforded opeinting within the confined space troni wl'iicle the oxygen has been. dissipated.

Het-ving thus described my invention, wim l claim is new and desire to secure by ters Patent ot the `lUnited States A spark plug oomprisine e nie i provided with en electrode, en sleeve inounted in tlie metal sleeve, sulator sleeve being provide.. i longiudinal recesses seperated by xegm Wall of the insulator sleeve, a central eefrtrode mounted in the Wall, means to ad- 'just said electrode, end closures for said recess, threaded inner and outer' electrodes nxounted in said end closures and (zo-operating with said central electrode, and an elec rnde imbedded in the insulator sleeve and having; its free end disposed between the inner electrode terminal and the electrode on' the metal sleeve.

Inl Stness whereof, I hereunto subscribe my name this 4th dayvof March, 1921.

FRANCIS A. CARTER. Witnesses:

ALBIN C. AHLBERG, E. J. BoURGEoIs.

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