US773168A - Sparking plug. - Google Patents

Description

PATENTED 001". 25, 1904.

0. F. SPLITDORF. SPARK'ING PLUG. APPLIGATION I ILBD MAR. 13,1903.

H0 MODEL.

UNITED STATES Patented October 25, 1904.

PATIENT OFFICE.

CHARLES F. SPLITDORF, OF NEW YORK, N. Y., ASSIGNOR TO ELECTRIC VEHICLE COMPANY, OF JERSEY OF NEW JERSEY.

CITY, NEW JERSEY, A CORPORATION SPARKING PLUG.

SPECIFICATION forming part of Letters Patent No. 773,168, dated October 25, 1904.-

Application filed March 13, 1903.

To all whom it may concern:

Be it known that 1, CHARLES F. SPLITDoRF, a citizen of the United States, residingin the borough of Manhattan, in the city, county, and State of New York, have invented a new and useful Improvement in Sparking Plugs, of which the following is a specification.

This invention relates to means, in conjunction with a sparking plug, to ignite gaseous IO charges in explosive-engines whereby an auxiliary spark-gap located in the secondary circuit of the induction-coil may be conveniently arranged with relation to said sparking plug for purposes of inspection to indicate the op- 5 eration of the coil, and said means further providing for the adjustment of the opposing conducting members, between which said auxiliary spark-gap is produced, whereby the extent of said spark-gap may be regulated in an extremely simple and convenient manner.

The invention further comprises the details of construction which will be specifically described hereinafter and pointed out in the claims.

In the drawings accompanying this application, Figure l is an elevation of a sparkplug, showing the holder for the conducting members between which the auxiliary sparkgap is formed and showing diagrammatically 3 the secondary circuit of an induction-coil.

Fig. 2 is a top plan view of the support for the conducting members, and Fig. 3 is a section on the line 3 3 of Fig. 2.

In the figures the letter A indicates the usual sleeve about the plug as screwed into bushing a, which bushing is screwed into the wall a. of the combustion-chamber of an explosive-engine.

B indicates the spark-point, which projects 4 into the combustion-chamber from the usual insulated electrode within theplug and whose opposite end is in contact with the cap of the binding-post 6, while a indicates the opposite spark-point, which projects from the sleeve A and which, through the binding-post a and terminal 0, is in circuit with the secondary winding C.

D indicates a strip of non-conducting ma- Serial Nol4=7,610. (No model.)

terial (preferably mica) which is secured at one end to the plug by means of the bindingscrew d, passed through said strip and screwed into. the binding-post b. In making this connection I bore a hole throughstrip D and place therein an eyelet d. I then take a small flat conducting member d2, of soft metal, pierce it, and pass it over the eyelet to permit said flat cond ucting member to lie against and parallel upon the strip D, whereupon the periphwardly to form retaining-flanges in the act of riveting the eyelet upon strip D, thus securing the conducting member (Z to strip D. The free end of conducting member (Z lying upon strip D, is narrowed to form a sparkpoint d In opposed relation thereto is another like conducting member E, reversely arranged and having spark-point 6, so that the two spark-points d 6 lie normally in the same plane and are separated from each other by a space or gap of a predetermined extent.

The conducting member E is secured upon strip D by a riveted eyelet e. A bindingscrew F is passed through eyelet e, and upon said screw F are placed the nuts ff to hold between them when tightly screwed the opposite terminal 0 of the secondary circuit. Thus with the excitation of the secondary circuit sparking occurs across the gap intervening between the spark-points (Z c, this result serving to intensify the current discharge at the spark-points B 6& within the combustionchamber.

According to the strength of the batteries employed, and in order to be able to attain the best results with new or part-ly-run-down batteries, I find it desirable to regulate the distance or extent of space separating the spark-points (Z e, setting them farther apart when the batteries are new and bringing them closer together when the batteries are partly exhausted. To this end the conducting members d Eare composed of soft or ductile metal, and their spark-points, when said members lie flat upon the strip D, are in the closest practical sparking relation to each other. Thus it will be seen that the distance separateral edges of said eyelet (Z are spread out ing said points may be increased considerably and according to the requirements of battery and other conditions by bending one or both of such members, as indicated by dotted lines in Fig. 1, to enlarge the intervening space or spark-gap. This convenient means of regulating the auxiliary spark-gap renders such element in the secondary circuit of great practical utility, because it enables the attainment of an accurate adjustment of the spark-points (Z c.

I prefer to construct the holder D of mica, because a strip consisting of mica laminations has ample strength for the purpose, and this material will withstand the effects of the heat generated in the auxiliary spark-gap without being subject to deterioration therefrom.

Having now described my invention, 1 declare that What I claim is- 1. The combination with asparking plugarranged in the secondary circuit of an inductioncoil, of a pair of opposed auxiliary conducting members in said circuit separated by a spark-gap, a supporting-holder of non-conducting material for said conducting members, and means for securing said holder upon said plug.

2. The combination with a sparking plugarranged in the secondary circuit of an induction-coil, of a pair of opposed auxiliary conducting members in said circuit separated by a spark-gap, a supporting-holder of mica for said conducting members, and means for se curing said holder upon said plug.

3. The combination with a sgarking plug arranged in the secondary circuit of an induction-coil, of a pair of opposed auxiliary conducting members in said circuit separated by a spark-gap, a supporting-holder of non-conducting material for said conducting members, a binding-screw passed through said non-conducting holder and one of said conducting members, to unite them upon the plug, and means securing the other conductingmember upon the non-conducting holder.

4. A holder composed of a strip of mica, a pair of eyelets riveted therein, said holder being secured to a sparking plug by the bindingscrew of the latter being passed through one of said eyelets, a terminal binding-post secured through the other eyelet, a pair of conducting members having opposed auxiliary sparkpoints supported upon said holder and secured thereto respectively by said eyelets, and a secondary circuit to produce sparking between said auxiliary s riark-points.

5. A holder of non-conducting material sup porting a pair of conducting members of duetile metal having opposed spark-prints separated by a spark'gap, and means including said conducting members in the secondary circuit of an induction-coil, said circuit also including the usual sparking members, the extent of said spark-gap being variable by bending one or both of said conducting members to separate them to a greater or less extent.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this llth day of March, 1903.

CHARLES F. SPLITDORF.

l'Vitnesses:

NA'r. B, CnATseY, F. \V. BARKER.

Images