US1286123A

US1286123A - Spark-plug.

Info

Publication number: US1286123A
Application number: US21691018A
Authority: US
Inventors: Joseph A Savage
Original assignee: Individual
Current assignee: Individual
Priority date: 1918-02-13
Filing date: 1918-02-13
Publication date: 1918-11-26
Anticipated expiration: 1935-11-26

Description

"Witnesaeq J. A. SAVAGE.

SPARK PLUG.

APPLICATION FILE-D FEB. 13. I918.

1 ,286,123. Patented Nov. 26, 1918.

JAZJ'm/aya,

JOSEPH A. SAVAGE, OF NEW HAVEN, CONNECTICUT.

SPARK-PLUG.

Specification of Letters Patent.

Patented Nov. 26, 1918.

Application filed February 1918. Serial No. 216.910.

To all whom it may concern:

Be it known that I, JOSEPH A. SAVAGE, a citizen of the United States, residing at New Haven, in the county of New Haven and State of Connecticut, have invented new and useful Improvements in Spark-Plugs, of .which the following is a specification.

This invention relates to'spark plugs for use in conjunction with internal combustion engines, and the main object of the invention is to produce a spark plug which may be used also as a priming device for the cylinder of such an engine, the plug embodying a novel construction, and relative arrangements of parts whereby the desired object may be obtained with accuracy and cortainty. 1

A further object is to produce a plug. the construction of whichwill enable the priming liquid or carbon removing liquid to be conducted to the spark terminals of the power and ground electrodes with the purpose of cleaning the same and rendering them free from carbon. lubricating oil or other adhering material.

With the above and other objects in view, the invention consists in the novel construction, combination and arrangement of parts, as herein described, illustrated and claimed.

In the accompanying drawings.

Figure 1 is a side elevation of the plug complete.

Fig. 2 is a similar view of the core of the plug and the parts theretoattached. omitting the outer shell.

Fig. 3 is a central longitudinal section through the core. showing the tubular power electrode and the parts attached thereto.

Fig. 4 is a detail view of the power elec-- trode and its attached parts. the same being partlv broken away in section to illustrate its tubular formation.

The improved plug resembles in appearonce. the spark plug now in common usc.the same comprising the metallic body or shell 1 having a reduced and threaded lower portion 2 adapted to screw in a corresponding opening in connection .with which the plug is.

used. The plug also comprises the core 3 which extends through the shell 1 and is secured in fixed relation by a clamping nut 4. One or more electrodes 5 mar be employed and a single power electrode 6.

In carrying out the present inwntion. the power electrode 6 is of tubular formation for the greater part of its length. the bore or passage 7 of said electrode being open at the upper outer end and terminating short of the inner or spark end of the electrode where it is intersected by a lateral outlet passage or port 8. The upper end portion of the power electrode 6 is threaded as shown the rounded extremity 13 of the core and 1.

forms a fluid tight joint to prevent loss of compression in the cylinder with which the plug is associated. The electrode 6 is also formed adjacent. to the cup 12 with a key or feather 14 which is received in a guideway or internal groove 15 in the bore of the core. This prevents the electrode 6 from turning within the core butadmits of a longitudinal movement of said electrode in the core.

The operation of the plug is as follows. The outer or upper priming cup 10 is first partly unscrewed from the power electrode 6 and then said cup and electrode are pressed downwardly until the outlet port 8 is exposed beyond the inner end of the core 3. Priming or other liquid introduced in the cup 10 will now flow through the power electrode into the inner cup 12 and will overflow said cup into the cylinder. When the outer cup 10 is screwed tightly down against the cap nut 11. the inner cup 12 is pressed tightly against the adiacent and correspondingly shaped end of the core 3 thcrebv expressing all the remaining liquid therefrom. The same operation is resorted to when using a carbon removing liquid for the purpose of softening and loosening any carbon or other matter which adheres to the sparking terminals of the electrodes.

16 designates a tubular bushing which extends through the bore of the plug and fits tightly therein. Said bushing extends entirely through the core and the upper end thereof is threaded to receive the member 10.

Said bushing is further formed with a slot through which the feather 15 projects. The

bushing 16 not only makes the core comlain or core from cracking if the cup 10 also having an outlet port which inter note the bore of the electrode and is adapted to 10 be dispowd beyond the inner end of the core 1 j by partly unscrewing said priming cup and "He 0} this! patent mty obtained for five cents each, by addressing the Commissioner pressing the latter toward the core, and a second cup on said electrode beyond the inner end of thevcore and adapted to receive the contents of said electrode,- the adjacent end of the core being shaped to fill the second named cup and express the contents therefrom.

In testimony whereof I affix my signature.

JOSEPH SAVAGE.

of ratentn Washington, D. 6.