US1452054A - Spark plug - Google Patents

Description

Patented Apr. 17,r 1923.

j ,j ETE 1 retener-r u. ortica.

oHiilIs'rY a; Pnorsr, or Lonevrnwnxas.

SPARK Prue.`

` Application fil-ed February 18, 1921. Serial No. 446,105,

To aZZ whom` t may-concern Be it known that I, CHRISTY A. Pnorsr, a citizen of the United States, residing at Longview, inthe county of Gregg and State of Texas, have invented a new and useful.

j aV spark plug in whichy the electrodes may `be readily cleaned Without removing the` spark plug from its position on the motor.

A further object is' to provide means for adjusting one ofthe electrodes whereby it is spaced pro-perly with relation tothe other electrodes in order to produce a spark gap of the right length.

In carrying out the invention a spark plug is provided with an off-set electrode over which a vertical electrode is arranged at one side of the plug, a gauge is provided so that by adjusting the parts toy a certain degree o-n the gauge, the electrodes are properly spaced. Vxhen the vertical electrode is' removed a vertical passage is provided thru which a cleaning brush` may be inserted for cleaning the angularly disposed electrodes as is obvious.

A construction designed to carry out the invention will be hereinafter described to gether with other features of the invention.

The invention will be more readily understood from a reading of the following speciiication and by reference to the accompanying drawings, in which an example of the invention is shown and wherein:

Fig. 1 is a side elevation of a spark plug constructed in accordance with my invention,

Fig. 2 is an enlarged vertical sectional view,

Fig. 3 is an underside view of the parts shown in Fig. 2,

Fig. 4 is a detail of the gauge, and

Fig. 5 is a View of the cleaning brush.

In the drawings thenumeral 10 designates a metallic plugmember or barrel which has its lower portion reduced and externallyscrew threaded and is provided with an annular overhanging shoulder 11 surmounted by an annular outwardly projecting flange 12 having angular faces for the reception of a suitable wrench. The plug member is provided with a vertical bore 13 disposed eccentrically and enlarged at its lower end to provide an internal shoulder 14. An insulating core 15 formed of porcelain or other suitable material has an annular collar 16 at its lower end engaging the shoulder 14 and fitting withinthe bore 13. in inclined boss 17 depends froml the lower end of the core.

IFor holding the core in the plug a pair of screws 18y are threaded into the bottom of the plug and support washers 19 which overlap onto the core and support the same as is best shown in Fig. 3. The core is reduced at its upperend and shoulderedwithin `the bore 13 to receive a packing gasket 20 which in turn receives a packing nut 21 threaded into the bore and snugly surrounding the core. In. this way the'core is snugly and `tightly held in the plug member and is leak p-roof. K

A central electrode 22 is embedded in the core 15 and has its upper end projecting and receiving a nut 23 to which the ignition wire (not shown) may be attached in the usual manner. The lower end of the electrode is bent and directed laterally thru the boss 17 to provide an annular extension 24 projecting from the lower end of said boss. At one side the plug 10 is provided with a vertical cylindrical opening 25 which also extends thru a boss 26 on top of the plug 10. The opening 25 is located over the end of the extension 24.

The upper end of the boss 26 is reduced and screw threaded to receive a cap 27 in which the upper end of an electrode 28 is securely fastened. The electrode 28 lfit-s snugly in the opening 25 and has its lower end suspended over the extension 24. A gage in the form of an angular flat spring member 29 is secured to the top of the plug by means of a screw 30. The upright portion of the member is provided with a central rib 31 adapted to engage vertical serrations on the cap 27. The member is provided with graduations 32 with which the top of the cap 27 is adapted to register. It will be seen that the rib 31 engaging in the serrations of the cap will tend to hold said cap in position and by rotating said cap it will be raisedor lowered, thus elevating or lowering the electrode 28 and determining the length of the gap between its lower end and the eX tension 24 of the electrode 22. By bringing the top of the cap 27 into registration with a particular graduation 32 the electrode will be properly spaced as is obvious.

In order to clean the electrodes the cap is unscrewed so as to remove the electrode 28,

` whereby the opening 25 is exposed. A suit able brush as a wire brush, such as is shown at 33 in F ig. 5, is inserted in the opening 25 and passed downwardly so as to engage the extension 24, which may be rapidly cleaned by a few strokes of the brush as is obvious. 'Ihe electrode 28 having been removed may be easily cleaned and replaced.

The particular advantage had by this invention resides in the fact that the electrodes may be cleaned without removing the spark plugor disconnecting the ignition-wires, and further the work may be done expeditiously. However, it isf essential that means `be provided for spacing the electrodes when the ,\electrode 28 is replaced. For this reason the gauge member 29 mor an equivalent means, is necessary in connection with the cleaning feature. It is obvious that by properly spacing `and arranging the graduations 82, the electrode 28 may be adjusted to a minute degree. The electrode 28 Will, of course, be grounded in the plug 10.

What I claim, is:

1. In a cleanable spark plug, the combina tion vof a barrel, an insulating member eccentrically mounted inthe barrel, a statione ary electrode embedded in the member and having its lower end projecting from said member and exposed, and a removable electrode eccentrically mounted in the barrel and overhanging the projecting end of the stationary electrode, an adjusting device connected with the removable electrode and mounted on top of the barrel, and an adjusting gauge cop-operating with the adjusting means.

2. In a cleanable spark plug, the combination of a barrel, an insulating member eccentrically mounted in the barrel and having a boss projecting below the same, a stationary electrode .mounted in the member and having its lower end bent and extending from the boss, the barrel having a vertical opening over the extension ofthe stationary electrode, a removable vertical j electrode mounted in said opening, a cap attached to theupper end of the removable electrode, a screw vthreaded projection engaged by the cap, and a spring-retaining gauge provided with graduations and engaging said cap.

CHRISTY A. PROPST.

Images