US1955628A - Spark plug - Google Patents

Description

April 17, 1934 M. T. GAILLAR D ETAL 1,955,628

SPARK PLUG Filed July 9, 1932 Patented Apr. 17, 1934 PATENT OFFICE SPARK PLUG Milton T. Gaillard, Halesite, and William J. Woodcock, Brooklyn, N. Y.

Application July 9. 1932, Serial No. 621,678

8 Claim.

This invention relates to an attachment for a spark-plug, such as will provide a proper heating chamber for the gaseousfuel and cause an atomizing of the gas at the nose of the sparkplug where the ignition takes place. The ignition does not take place at the lower end of the preheating chamber, but in the upper compartment where the attachment is applied to the lower end of the spark-plug, thereby eliminating fouling of the spark-plug above, preventing carbon formation, and producing a flame in the cylinder instead of merely an electric-spark.

This invention embodies a shell attached to the lower end of the spark-plug and enclosing a sleeve spaced from the wall of the shell so as to provide a passageway therebetween for the gaseous mixture to pass up through the shell and be discharged through the orifice at the upper end of the sleeve, in an atomizing action, directly 2() at the point of spark or ignition which takes place .therefor at the upper end of the internal chamber and communicates with the cylinder down through the chamber, producing a burning flame in the cylinder which completely consumes approximately all of the gas.

In the accompanying drawing:

Fig. 1 is a sectional view through our attachment applied to a'sp'ark-plug, in which the latter is shown partly in side elevation;

Fig. 2 is a top plan view of the attachment; an

of, the unit in perspective.

The spark-plug is designated as a whole by the numeral 1, and may be of a conventional type to which this invention is applied. The usual electrodes are shown at 2, while the threaded lower end of the spark-plug is designated 3, and this normally screws into the casing of the engine so as to dispose the electrodes in communication with the cylinder.

Our attachment embodies a shell 4, the upper end of which is internally screw-threaded, as at 5, to screw onto the threaded portion 3 of the spark-plug, while the lower end portion is extemally threaded as at 6 to be screwed into the spark-plug opening in the engine casing.

A nut portion 7 is formed on, or secured to, the shell 4 to facilitate tightening of it on the lower end of the spark-plug and screwing of the unit into the engine casing.

A sleeve 8' of substantially smaller diameter than the internal diameter of the shell is mounted in the shell, leaving an annular gas passage -9 therebetween. The upper end of the sleeve 8 has Fig. 3 is'a disassembled view showing the parts lateral flanges 10 with slits or notches 11 ther'e' between, which flanges are formed by slitting the upper end of the cylindrical sleeve and bending the slit portions laterally to form the flanges. The flanges seat on a shoulder 12 formed in the shell 4, as shown in Fig. 1, so that they support the sleeve 8 concentrically in the shell. A disk or baille-plate 13v flts on top of the flanges 10, and is of a size to be engaged by the lower end of the spark-plug to clamp the flanges 10 in place on the shoulder 12, and thus securely hold the sleeve 8 in place.

This disk or battle-plate also causes an inward directing of the gaseous fuel through the notches or openings 11 into the interior of the sleeve just beneath the electrodes 2 which communicate with this space through an opening 14 in the disk or baflle-plate.

' The burning of the fuel in the sleeve 8 creates a suction through openings 11 and around the sides of the sleeve, which'draws the fuel up through the annular passage 9 where it is preheated before combustion, and this preheated fuel is atomized through the slits or openings 11 directly at the end of the spark-plug where combustion takes place. The ignition does not first so take place at the lower end of the chamber, but

at a point at the upperend thereof, thereby eliminating any fouling of the spark-plug above and preventing carbon formation. At the same time this action produces a flame in the cylinder for s5 consuming the gas, and the gas is thereby completely consumed.

We claim: g

1. The combination with a spark-plug having cooperating spark-electrodes, of a shell attached to the spark-plug and extending downwardly from the lower end thereof, a-sleeve mounted in the shell and cooperating therewith to provide a passageway extending upwardly in the shell externally of the sleeve, said sleeve having one or more openings at theupper end thereof establishing communication between the passageway and the sparking-electrodes and conveying preheated gaseous fuel thereto.

2. The combination with a spark-plug having cooperating spark-electrodes, of a shell attached to the lower end of the spark-plug and extending downwardly therefrom, a sleeve mounted in the shell and cooperating therewith to provide a passageway within the shell communicating with the upp f end thereof approximately at the point of the electrodes.

3. The combination with a spark-plug having spark electrodes, of a-shell removably attached to the lower end of the spark-plug, a. sleeve mounted in the shell in spaced relation from the walls thereof providing an upwardly-extending passageway therebetween, thev upper end of the sleeve being flared laterally and supporting the sleeve in the shell, said sleeve having one or more openings at the upper end only thereof, and disposed beneath the sparking electrodes for direct ing the gaseous fuel from the passageway into communication with the electrodes.

4. The combination with a spark-plug having spark electrodes at the lower end thereof, of a shell detachably secured to the lower end of the spark-plug and having an internal shoulder, a sleeve mounted in the shell in spaced relation from the walls thereof, providing an upwardlyextending passageway therebetween, the sleeve having outwardly extending flanges at the upper end thereof seated on the shoulder in the shell, and having openings between the flanges, and a disk or baffle-plate seated on the flanges and clamped between the flanges and the lower end of the spark-plug to hold the shell in place, said disk having an opening therein beneath the sparking-electrodes.

5. The combination with a spark-plug having sparking electrodes at the lower end thereof, of a shell having screw-threaded connection with the lower end of the spark-plug to be detachably secured thereto, said shell having an internal annular shoulder therein, a tubular sleeve mounted in the shell in spaced relation from the internal walls thereof providing a preheating passageway therebetween, said sleeve having an internal chamber in direct vertical alignment with the electrodes and beneath the electrodes, flanges secured to the sleeve and seated on the shoulder in the shell, and a disk or bafiie-plate clamped between the lower end of the spark-plug and the flanges to hold the shell in place, and having a central opening between the internal chamber of the sleeve and the sparking-electrodes, said sleeve having one or more openings therein beneath the disk or baffle-plate establishing communication between said internal chamber and the surrounding passageway.

6. The combination with a spark-plug having sparking-electrodes at the lower end thereof, of a shell extending downwardly from the lower end of the spark-plug, a sleeve ,within the shell forming an internal chamber in axial alignment with the spark electrodes and beneath the electrodes and having an upwardly-extending passageway outside of said chamber communicating with the upper end of the chamber at the point of the electrodes.

7. An attachment for an end of a spark-plug of the type which has cooperating spark electrodes comprising a shell having means for attaching the same to the end portion of the sparkplug, a sleeve concentrically within said shell and forming an internal chamber arranged in position to be aligned with the spark electrodes and beneath the electrodes, and having a longitudinally extending passageway outside of said chamber communicating with an end thereof at the point of the cooperating spark electrodes.

8. An attachment for an end of a spark-plug of the type which has cooperating spark electrodes, comprising a shell having means of attachment to the end of the spark-plug, a sleeve mounted in the shell in spaced relation from the walls thereof providing an upwardly extending passageway therebetween, the end of the sleeve being flared laterally and supporting the sleeve in the shell, said sleeve having one or more openings at said flared end only thereof and disposed approximately at the point of the spark electrodes for directing the gaseous fuel from the passageway into communication with the electrodes.

MILTON T. GAILLARD.

WILLIAM J. WOODCOCK.

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