US1376845A - Assigstqk to essex bjqtdbs osi - Google Patents

Description

R. H WHISLERX l-GNITION SYSTEM.

APPLICATION FILED JAN. IQ, 1919.'

1,376,845. Patented May 3, 1921.

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RALPH H. WEISLER, OI DETBOI'I, T'ZICHlIG-AN, ASSIGNQR TO ESSEX MOTORS, OI IDE'IEUIT, TdXlIlHIQhhN. .A C'GRPQRATEON OF MICHIGAN.

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Specification of Letters Patent.

To all 'i-chom it may concern:

Be it known that I, RALPH H. WHisLnn, a citizen of the United States, residing at Detroit, county of Wayne, State of Michigan. have invented a certain new and useful Improvement in Ignition Systems, of'which the following is a specification, reference being had therein o the accompanying drawin s.

ily invention relates to a coil to be used as a part of the ignition system described in my prior application Serial No. 213,655, filed Jan. 25, 1918. As'therein described said ignition system comprises three circuits (11.) a circuit in which is a source of electromotive force such as a batterv, circuit breaker operated in time with the engine and the primary of an induction coil; (b) a circuit in which is located the secondary of said induction coil, a discharge gap and the primary of a. disruptive discharge coil; and (c) a circuit containing the secondaryof said disruptive discharge coil and the electrodes of a spark plug, said electrodes being located in the combustion chamber of an internal combustion engine.

In the practical application of my in vention, I find it desirable to make the dis-.

ruptive discharge coil into a unit which may. be placed on the top of the spark plug. The present invention therefore has for itsobject to provide such a "unit. The coil embodying my invention is so constructed that it may be applied to a spark plug or removed ti'ierefrom very quickly. It is neat and compact and performs its electrical functions satisfactorily.

The invention will be fully understood from the following description when taken in connection with the accompanying drawings and the novel featuresthereot' will be pointed out and clearly defined in the claims at the close of this specification.

In. the drawings, Figure 1 is a side eleva tion partly in section of a spark plug to which is applied the coil embodying the present invention.

Fig. 2 is a vertical section of the coil shown in Fig. 1 with the windings removed.

Fig. 3 is a section of the coil support 18 on line 3-3 of Fig. 1. v

Referring now to the drawings, at A is shown-a spark plug of ordinary construction being grounded on the cylinder block of the engine as indicated at B. The electrodes are designated 10 and 11 respectively. The electrode 11 is centrally disposed within an insulating bushing 12 and has its upper end donned into a screw threaded terminal 13 in Fig. l. The lower end of the spool 15 is inclosed in a metallic support 18 to which the ends of the wires of the two coils 16 and 17 are electrically connected as shown at 20 and 21. The support 18 is formed with a series of downwardly projecting legs or prongs 19 separated by spaces 22, (see Fig. 3). The legs or prongs rest on the metallic body portion 14 of the spark plug and are rabbeted slightly as shown at a to fit over the shoulder more securely. It will be seen that there is a. metallic contact between the metallic support 18 and the bodyof the spark plug which is itself screwed into the engine so that the primary winding of the coil is grounded.

Centrally disposed of the. coil is a stem electrode 11 of the spark plug-A. The

upper end ofthe stem 23 is provided with a thumb nut 25 and a spring 26 is interposed Patented May 3, 1921.

i 23 screw threaded at its lower end as shown at 9A: to receive the upper end of the central The coil is secured to the spark plug by means of the stem 23. When it is desired to put the coil'in place it is set on top of the spark plug with the prongs 19 of the metallic support resting on the metallic body 14 of the spark plug. The stem 23 is then screwed down onto the upper end of the centralelectrode ll-rbf the spark plug until the spring 26 is compressed somewhat. This thence returns i "rho prinmry source.

member 2? to the stem holds tho coil Emily on. plug and the spring pzmsion wiihoul any i or any resulting electrical confirms.

When in place on the mrlr plug, lhecurrent entering through wire :59 and post 28, passes through the primary winding 16 and through the metslllcsxq port 1S sml the spark plug body 1% to the engine block ind he current generated in thc womlsry winding 1'? of the coil pass-o5 through the contact. 533, illil'lcii through the central electrode ll and across the gap to the electrode thence lzhrough plug body 14, support 18 and crmncclio'n 20 back to winding 17. The construction clcscrihsd is such that, while the support l8 r sss firmly on anrl makes a good electrical connection with the body of the spark plug, air may nevertheless circulate through the interior ill of the coil thus tending to keep both coil and spark plug cool. The air enters through "1 oi iho spark unequal the spaces 22, passes up around the centrzr slam 53 and out at the cop through 0. l; 3: claim is: 'M Q11. comoinalion with a spark plug having a control electrode the. end of which is screw threaded, coil comprising primary zmzl secondm' windings on wspo'ol, and a central nae-ml it screw threaded. for engagement with che spark plug and electrically connected will) sold secondary windinm ln conihinzxtlon with a spark plug having a control slsctrozle the and of which is screw ain-ended o coil. comprising primary and sccowlary findings on. a spool, a metallic support for the coil adapted to lit the metallic shell of tho spark plug, both of sold coils being clecrricully connected to the support, and a central member screwtlircmlell for engagement with the electrode, said central member being electrically connected with ilk secondary winding and sewing lo secoro the coil to the spark plug and also to make electrical contact with the electrode.

lo testimony whereof lollix my signature.

RALPH H. Win-sum

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