US1424526A - Spark-plug core - Google Patents

Description

H. J. SEELY.

SPARK PLUG CORE- APPLICATION FILED NOV-7,1921.

Patented. Aug. 1,1922.

flej J -11m UNHTW HARRY J. SEELY, OF LOS ANGEL ES, CALIFORNIA.

SIP-PLUG COB/E.

Specification of Letters Patent.

Patented Aug. 1, 1922.

Application filed November 7, 1921. Serial No. 513,358.

vention being to provide a plug which may be readily and easily dismantled to permit the cleaning of the plug with facility.

Another object of the invention is to provide a plug wherein the positive and negative electrodes are carried by the core to be removed therewith.

A still furtherobject of the invention is to provide novel means for insuring the grounding of the negative electrode.

With the foregoing and other objects .in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and. claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may be made within the scope of what is claimed, without departing from the spirit of the invention.

Referring to the drawing I The figure is a longitudinal sectional view through a spark plug constructed in accordance with the present invention.

Referring to the drawing in detail, the shell embodies an upper section 5 and a lower section 6, the lower section being provided with a threaded portion? to permit the same to be positioned in the usual spark plug opening of an internal combustion engine.

he lower section 6 is also formed with an enlarged portion 8 which has connection with the lower portion 7 as by means of the inclined walls 9 which rovide a seat for the core 10 to be hereina ter more fully described.

The enlarged portion 8 is internally threaded to accommodate the threads 11 of the upper section 5 whereby the core may As shown, the core is provided with an enlarged central portion 16 having an inclined lower wall 17 contacting with the gasket 14 which is positioned between the core and inclined wall 9 of' the lower section. Thus it will be seen that the core 10 is held within the sections of the shell in a manner to prevent movement of the core with relation thereto.

An electrode 18 extends through the core and has its lower extremity terminating at a point in spaced relation with the lower end of the core, where the same extends inwardly as at 19,- the same being arranged in close proximity to the end 20 of the negative electrode, that is also embedded in the core. This electrode 21 has its upper extremity terminating short of the upper end of the core, and as shown, an opening 22 is formed in the core adjacent to the shoulder 15, the opening being designed to accommodate the coiled spring 23 which is shown as positioned therein, one end of the coiled spring being in engagement with the upper extremity of the electrode 21, while the opposite end of the coiled spring 23 engages the metal gasket 14 to ground the current passing through the electrodes.

At the upper end of the core, are provided the nuts 24 which operate on the threaded portion 25 of the electrode 18, and provide means for securing a terminal thereto. Thus it will be seen that when it is desired to disassemble the elements of the plug, it is only necessary to rotate the upper section 5 to disengage the threads 11 and internal threads of the enlargement 16 whereupon the core may be withdrawn from the shell.

When the core is replaced, the coiled spring is positioned in its opening, and the gasket 14 is positioned over the spring to compress the same and force the opposite end thereof into engagement with the negative electrode of the plug.

Having thus described the invention, what is claimed as new is:--

1. In a spark plug, a shell including opposed sections, a core supported within the shell, an electrode extending through the core, said core having an opening formed in the side thereof, an electrode having one end terminating at a point adjacent to one end of the opening, the opposite end of the last mentioned electrode being disposed in proximity to the first mentioned electrode to provide sparking points, a gasket disposed disposed between the core and shell, and a coiled spring contacting with the gasket and one of the electrodes to ground a circuit passing throu h the plug.

3. In a spar plug, a shell embodying opposed sections, alcore positioned within the shell and clamped between the sections, electrodes in the 'core, said core having an opening, resilient means positioned in the opening and contacting with one of the electrodes, a gasket supported between the core and shell and contacting with the resilient means to ground a circuit through the'shell.

In testimony that I claim the fore oing as my own, I have hereto afiixed my signature in the presence of two witnesses.

' HARRY J. SEELY.

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