US1465582A - Spark plug - Google Patents

Description

Aug. 21, 1923.

S. F.. LEAGER ET Al.

S PARK PLUG Filed Sept. 2, 1921 gwben kwin' 50 is han rigidly in Fatented Ang. 21, 1912.3.

KFFI- SAMUM F. LEAGER AND FRANK jH. VLIE'I, 0F SPBOTSWOOD, Nliil JERSEY.

eraan rLnG.

Application Med September, 1921. Serial No.- 497,821. A

'To all whom z't may concern:

Be it known that we, SAMUEL F. LEAGER and FRANK H. Vmn'r, citizens of the United States, residing at 'Spotswood, in the county of Middlesex, State of New Jersey, have invented a new and useful Spark Plug; and we do hereby declare the following to be a full, clear, and-exact description of the' invention, such as will-enable others skilled in the art to which it appertains to make and use the same.

The invention relates to spark has for its object to provide a device of this character, wherein the insulating core of the spark plug is provided with a plurality of spaced rings adjacent its lower end, and adjacent the lower end of the spark plug shell, thereb formin in connection with a plate carried, by the owerend of the electrode a multiple of spark gaps extending entirely around the lower end.` of the core, thereby insuring sparking entirely around the core and at the same time forming spark gaps whereby the spark will be intensiiied.

vthe invention resides in the combination and arrangement of parts as hereinafter set forth shown in the drawings, described and claimed, it being understood that changes in the precise embodiment of the invention may be made within the scope of what is claimed without departing from the spirit of the invention.

In the'drawings: 1Figure 1 is a side elevation of the spark p ug. V

Fi re 2 is a. vertical sectional view through the lspark plug.

Figure 3 is a perspective view of one of the 40 rings carried by the lower end of the insulatin core.

' Re erring to the drawings, the numeral 1 designates a metallic shell, the lower'` end of which is provided with threads 2 'adapted to be screwed into a cylinder head.

Threadsv 2 are carried by a hollow c lindrical extension 3 which extends into t e combustion chamber of the engine. Disposed in the shell 1 is an insulating core 4, which 'core place in the shell 1 by means of a lock .nut 5 of the usual construetion. The core 4 whichv is formed from in plugs and With the above and other objects in view.

-sulating material is provided with a downl wardly extending cylindrical extension 6 axially dis osed within the cylindrical extension 3 oi the shell. Extension 6 extends to a point below the low'er end of the cylindrical extension 3' and is provided with a plurality of spaced annular grooves 7 in which grooves are disposed split spaced rings 8. Rings 8 are formed from conductor material and the upper ring is located adjacent the lower end of'the cylindrical exten'- sion 3 thereby forming an annular spark gap,

which the current jumps and from the upper ring 7 said current .passes to the lower ung 8 and thence to the metallic cap plate 9 earried by the velectrode l0 `which extends through the insulatingmember 4. As the current jumps the various gaps from theV lower end of the cylindrical portion 3 of the shell 1, from ring 8 to the adjacent ring and from the lower lring to the cap 9, it will be seen that the spark will be intensified, and

that sparkin will take place entirely around the lower en of the cylindrical extension 6, thereby insuring uniform sparking, also an intensified sparking, and at the samel time uniformly ignting the charge within the cylinder.

From the above it will be seenothat the spark plug is provided which is simple in construction and one wherein the spark will be intensified. It will also be seen that by providing split rings 8, that said rings' may be easily and quickly replaced when desired without damaging the plug thereby allowing the plug to be easily and quickly repaired.

The invention having been set forth what is claimed as new and useful is A spark plug comprising a shell, an insulator disposed in said shell and having its lower end spaced from the inner wall of the shell and its extreme lower end extending beyond the lower end of the shell, an annular inwardly extending inte al iange carried by the lower end of the s ell, split rings Aformed from conductor material surround l the electrode and previded with;l an upnames to this specification in the presence of Wardlyl extending annular' ange, said inwardly extending annular flange carried by the casing, split rin s and upwardly ex- 5 tending flange, carrie by the conductor cap being equidistant from each other.

In testimony whereof We have signed our -Wo subscribing Witnesses.

SAMUEL F. LEAGER;

y, FRANK H. VLIET. Witnesses FLORENCE LEAGER, FmRENCE M. VLIET.

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