US1389152A - Spark-plug - Google Patents

Description

SPARK PLUG.

,19121101110111111211 SEPT. 18. 1919.

1,389, 1 52. K Patented Aug. 30, 1921.`

A TUR/VEYS PATENT OFFICE.

i ROBERT WILLIAM MOORE, OF sa. LOUIS, MISSOURI.

SPARK-rime.

Specification'of Letters Patent.

Patented Aug. 30, 1921.

Application filed September 18, 1919; Serial No. 324,385. f

T 0 all w hom it may com-era o Be it known that I, ROBERT TV. MOORE, a citizen of the United States, residing at St. Louis, -in the State of Missou-ri, have invented new and useful Improvements in Spark-Plugs, of which the fol-lowing is a specification. l

My invention relates to spark plugs for use in connection with internal combustion engines. f

An important object of the invention is to provide a Spark plug vwhich may be quickly and conveniently cleaned without the use of tools, while the same is installed upon the 7cylinder of the engine,` and without separating the elements of the spark plugs. Y y

Otherl objects and advantages of the invention will be apparent during lthe course of the following description.

In the accompanying `drawings forming a part of this specification, and -in which like numerals are employed to designate like parts throughout the same,

Figure 1 is a side elevation of a spark plug einbodyingmy invention, Y

Fig. l2 is a central longitudinal sectional view through the same,

Fig. 3 is a horizontal section taken on line 3--3 of Fig. 2,

Fig. 4 is a simi-larview showing a 4dii?- erent iorin of cleaning element,

Fig. 5 is a similar view showing .a still different form ofk cleaning element,

Fig. 6 is a plan view of a stop cap, and Fig. 7 is a top plan view of a carrier.

In the drawings, wherein for theV purpose of illustration is shown a preferred embodiment of the same, Athe numeral 1() designates the body portion of the spark plug, which is polygonal so that it may be conveniently engaged by a wrench. The body portion 1() may be formed of metal and carries an exteriorly screw -.-threaded tubular extension 11, to engage within the screw-threaded opening in the cylinder 01:.

the engine. A copper washer 12 engages the lower end oi' the body portion 10, as shown.

The body portion 10 has a screw-threaded central longitudinal opening 13, for receiving the screw-threaded portion 14 of a tubular carrier 15. This carrier is provided at its upper end with a handle or handlesY 16, for convenient turning of the same.

The carrier 15 is provided near the screwthreaded portion 14 with `an Yannular flange 17, provided with diametrically foppositely arranged lugs`1`8, to be passed through openings or notches 19, in the flange 20, Oi' a stop cap 21. This stop cap has screwthreaded engagement at 22, with the body portion 10. The stop cap serves to prevent the accidental separation of the carrier 15 and body portion 10.

Arranged within the tubular carrier 15 is an insulating sleeve 23, formed of porcelain orthe like, and held therein by a ring or bushing 24, screw-threaded to the carrier. The insulating sleeve receives and holds an electrode or firing pin 25, the upper end o-r' which yis screw-threaded for the reception of a bind-ing nut 26, having a washer 27 therebeneath. The lower end of the `electrode 25 is arranged near vand spaced from an yelectrode 28 or firing pin, electrically connected with the extension 11.

The body portion 10 is provided with an interior annular chamber 29, through which the lower portionBO of lthe insulating element Or sleeve 23 passes. A cleaning 'element or disk 31 is arranged within the chamber 29 and has aA recess 32 for the reception of the portion 30. This recess has its contacting face' 33 serrated or roughened. The disk 31 is provided in its -periphery with a notch 34, receiving an anchor pin 35, holding the same against displacement. The disk 31 is yurged inwardly toward the portion 30 by a 'compressible coil spring 36, held within an adjustable housing 37, having screw-threaded engagement within an opening 38. The tension oli the spring 36 may be regulated by turning Vthe housin@ 37.

Tn Fig. 4 the spring 36 and housing 37 are omitted and a leaf 'spring 39 substituted therefor.

In Fig. 5, thecleaning element is in the form of a spring, bent to provide oppositely arranged arms 40, having blades 41, contacting with the portion 30. The spring is bent to form an eye 42, receiving the pin 35.

In all forms of the invention it will be noted that the cleaning element proper embodies a yoke-like structure having a cleaning portion and is spring actuated into engageinent with the insulating sleeve and its electrode.

In the use of the device, while the body portion 10 remains in placeupon the cylinder, the carrier l5 is rotated, which causes the insulating element 23 to be moved longitudinally and turned, whereby the portion 30 moves in contact with the cleaning element and the carbon is cleaned or scraped therefrom.

It is to be understood that the form of my invention herewith shown and described is to be taken as a preferred example of the same, and that various changes in the shape, size, and arrangement of parts may be resorted to without departing from the spirit of my invention, or the scope of the subj oined claims.

Having thus described my invention, I claim 1. A spark plug orP the character described, comprising a tubular body portion interiorly screw-threaded and provided with an interior chamber', a tubular carrier having a screwthreaded portion engaging within the tubular body portion, a flange formed upon the carrier and having stop lugs, a stop cap secured to the body portion and having a iiange provided with openings for the passage of the lugs, an insulating sleeve held withinthe carrier, a cleaning element arranged within the interior chamber and vengaging the insulating sleeve, and an electrode arranged within the insulating sleeve, and a coacting electrode arranged near the first named electrode.

2. A spark plug o'l the character described, comprising a body portion having a screwthreaded open and interior chamber, a carrier having screw-threaded engagement within the screw-threaded opening, an insulating sleeve held by the carrier, an electrode arranged within the insulating sleeve, a coactiug electrode arranged near the iirst named electrode, a cleaning element held within the interior chamber and engaging the insulating sleeve, a housing having screw-threaded engagement with the body portion, and a coil spring held within the housing and engaging the cleaning element.

3. A spark plug of the character described comprising a body portion having an opening therethrough and a chamber therein, a carrier mounted in said opening, an insulating sleeve held by the carrier, an electrode arranged within said insulating sleeve, a coacting electrode arranged near the iirst named electrode, a cleaning element arranged Within the interior chamber and engaging the insulating sleeve and spring means for maintaining said cleaning element in engagment with said insulating sleeve.

4. A spark plug of the character described comprising a body portion having an opening therethrough and a chamber therein, a

Vcarrier mounted in said opening, an insulating sleeve held by the carrier, an electrode arranged Within said insulating sleeve, a coacting electrode arranged near the first named electrode, and a spring-actuated cleaning element arranged Within the interior chamber having cleaning portions in engagement with the insulating sleeve.

5. A spark plug of the character described comprising a body portion, an insulating sleeve movable with respect to said body portion, an electrode arranged within said insulating sleeve, a coacting electrode arranged near the first named electrode, a cleaning element engaging the insulating sleeve, and spring means for maintaining said cleaning element in engagement with said insulating sleeve.

6. A spark plug of the character described comprising a movable electrode, a coacting electrode arranged near said movable electrode, a cleaning element engaging said movable electrode, and spring means for maintaining said cleaning element in engagement with said electrode.

7. In a spark plug of the character described, a cleaning element comprising a spring actuated yoke-like structure having cleaning portions adapted to engage the electrode oit' the spark plug.

8. A spark plug of the character described comprising a body portion having an opening therethrough and a chamber therein, a carrier mounted in said opening, an insulating sleeve held by the carrier, an electrode Varranged within said insulating sleeve, a coacting electrode arranged near the first named electrode, a cleaning element arranged within the interior chamber and engaging the insulating sleeve, and spring means for maintaining the cleaning element in engagement with the insulated sleeve manually operable means for actuating said carrier whereby the cleaning element traverses the insulating sleeve. Y

ROBERT WILLIAM MOORE.

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