US891112A - Spark-plug protector. - Google Patents

Description

G. H. STUART.

SPARK PLUG PROTECTOR.

APPLIUATION FILED NOV. 13, 1906.

W/TNESSES:

PATENTED JUNE 16, 1908.

CHARLES HENRY STUART, OF NEWARK, NEW YORK.

slemmi-PLUG.v PROTECTOR.

Specification of Letters Patent.

Patented June 16, 1908.

Application led November 18, 1905. Serial No. 287,092.

To all whom it may concern:

Be it known that I, CHARLES HENRY STU- ART, a citizen of the United States, and a resident of Newark, in the county of Wayne and State of New York, have invented a new and Improved Spark-Plu Protector, of which the following is a ful'clear, and exact description.

The object of my invention is to rovide improved means for protecting s ar plugs on internal combustion engines om rain, spray or other moisture which would tend to s ort circuit the igniting circuit and prevent a proper spark. f

The invention is especially useful in connection with spark plugs used in boats, automobiles and in other exposed positions, and it consists in certain special features of construction which will be fully set forth hereinafter and particularly pointed out in the claims.

Reference is to be had to the accompanying drawings which illustrate as an example the referred embodiment of my invention, in w ich drawings Figure l is a sectional view of the improvement applied to a spark plug; Fi 2 is a sectional view ofthe device etache and Fig. 3 is a bottom plan view.

The body a, of the protector is preferably cylindric in form, and is constructed of suitable insulating material, such, for example, as indurated rubber or a compound or'composition thereof. The body is open at each end, and its upper end is closed by a removably secured cap b also of insulating material. Preferably this cap is screwed into lace. Projecting-from one side of the bodylntermediate its ends is a nipple c which surrounds an orifice in the side of the body a, which is also formed of insulating material. I prefer to make this ni ple integral with the body a. Within the bo y above said nip le is a wall or partition.1` of metal. This is Inly seated in the body a, and is formed with an openir o' d to receive the central electrode of the spark plug. Said wall 4is also formed with two openings d2 to receive the wire e which is in connection'with the spark plug.

In the use of the invention, the insulation on the conductor e is pared down to it snugly in the nipple c and the connection between the insulation and nipple is securel tapedto prevent the entry of moisture. T e cap b is then removed and the wire e is passed in and out through4 the openings d2 to make elec-l i Athe `plate d. After this the top nut of the plug is screwed down on the late d and the ycap b of the protector screwe over the body a. The current nowpasses from the wire e to the plate or wall d and through thesame to the central electrode of the plug. It should be understood that the plate d should in no case be allowed to contact with the metal body of the lug since in` this event a short circuit wou d result. This device thorou hly incloses the plug and prevents the co lection of moisture thereon, either from rainspray or other causes, and consequently it prevents the establishment of a short circuit between the conductor 'e and the cylinder of the engine, which short" circuit would defeat the production of the spark on which the ignition of the working charge of the engine depends. v

Having thus described the preferred form of my invention, what I claim as new and desire to secure by Letters Patent is:

' 1. A spark plug rotector having an insulating body, a nipp e projecting from the side thereof, an insulating cap removably secured on 'the top of the body, and a metal wall adapted to have connection with thc conductor and secured in the body intermediate its ends and having an openlng therein to receive a part of the plug.

2. A spark plug rotector having a body of insulatin materia adapted to inclose the lug, yan a metallic member located in the body intermediate its ends and serving as a means for attaching the protector to the plug apd a connection between 'the conductor an p ug.

8. A spark plug protector having an insulating bod with an opening in its side for the passage ofytheconductor, an insulating cap removably secured on top of the body, and a perforate metal Wall located in the body intermediate its ends. d'

4. A spark plug rotector having a body of 4insulating materia adapted to inclose the plug, and a metallic perforate wall located in the body intermediate its ends, and adapted to effect connection between the conductor and the spark plug.

5. A-spark lug protector having an insuplu whereby securely to hold the protector lation body a( apted to inclose the plug, and l 1n t(lace. means Within the body for fastening the n testimony whereof` I have signed my same to the plug and connecting the conduoname to this speiication in the presence of 5 tor Wih the lplulg. h b two subscribing Witnesses.

6. s ar u roteotor avin a 0d adapted pto inlloepthe plug, andga trans) CHARLES* HENRY STUART versely extending metallic member secured Witnesses:

Within the body intermediate its ends and F. M. VAN TAssEL, 10 adapted to be engaged with a part of the ARTHUR L. CHRISTY.

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