US1431261A - Electric ignition apparatus - Google Patents

Description

' L.; W, ROSENTHA L 'AND G.'J.. LAN G,

-' ELECTRIC mmn'om APPARATUS.

v v APPLXCATION FILED OCT. 1 1918, 1,431,2 1..

"Patented Oct. 10, 1922.

m i 0 $3 V Fatented Oct. 10, 1 922. 1

UNITED STATES 1,431,261 PATENT" OFFICE.

LEON W. ROSENTHAI}, OF NEW YORK, N. Y., AND GUSTAVE J. LANG, F WEEHAWKEN,'

NEW JERSEY, ASSIGNORS, BY MESNE ASSIGNMENTS, T0 AMERICAN BOSCH MAG- NETO CORPORATION, OF YORK, N. Y., A CORPORATION OF YORK.

' ELECTRIC IGNITION APPARATUS.

Application filed'October 1, 1918, Serial No. 256,460.

To all whom it may concern; y

. Be it known that we, LEON IV. ROSENTHAL, a citizen of the United. States, residing at 106 Central Park west, in the city, county, and'State of New York, and GUSTAVE' J.

LANG, a citizen of the United States, re-

siding at 849 Boulevard east, Weehawken,.

in the county of Hudson and State of New tus for this purpose comprising a single Jersey, have inventedcertain new and vuseful Improvements in Electric Ignition Apparatus; and we do hereby'declare the followingv to be a full, clear, and exact description of-the invention, such as will enable others skilled in'the art to whichit appertains' to make and use the same.

@Ihe present invention relates to electrlc ignition apparatus for simultaneously produoing sparks at two or more spark plugs in a cylinder of an internal combustion-en gine, or in a plurality of cylinders-in turn,

from two or more magnetos and more particularly it comprehends the use of apparamechanical interrupter forisimultaneously altering the circuits of two or more magnetos, and suitable means for conducting to the respective spark plugs the ignition currents generated therein. y

In internalcombustion engines having comparatively large cylinders, it; is now usual to provide more than one sparkplug in each of the cylinders, in order that the flame propagation beaccelerated throughout the combustible mixtures and the combustion. made more complete thereby in each working stroke. Heretotore, this was sometimes accomplished by connecting two spark.

plugs in a cylinder in electrical series and producing the sparks at both from a single source, but where a single magneto was usedfor this purpose, .difiiculty arose on account ofthe increased voltage generated in the magneto. In another prior arrangement, two independent magnetos were used, but in that case, a slight variation in the timing or in the wear or'setting of the driving gears, or of the operating parts of the interrupter, caused the sparks to occur successively instead of simultaneously, with the result that the second spark is useless,

or practically so, especially when the engine operates at high speed or has many cylinders In accordance with our invention, these is, in phase with each'other. In this way, i

the circuits of all the magnetos are altered, that isopened, closed or grounded, at the same instant, and thus sparks are produced at the same instant at all of the spark plugs in each cylinder, irrespective of the timing ad ustment of the interrupter, and of any usual variationdue to setting or wear of the driving gearing. In any of these an rangements, the distributors for a multicylinder engine may be incorporated .with the respective magnetos or they may be mounted on a common shaft or on independent shafts driven at'cam shaft speed for t cycle engines. The mechanical-interrupter may be mounted on a separateshaft driven by the engine at the same or a different speed from that of the magnetos,

neto shafts, the circuits of the magnetos being altered by the mechanical interrupter at substantially the periods of their maximum generation.

or directly on one or the other of the mag- In the accompanying drawings illustrat- I ing several embodiments of our invention in application, as an example, to a 12-cylinder t-cycle engine having two spark plugs in each cylinder, wherein the mechanical. interrupter is mounted on an operating shaft to which,two high tension magnetos are independently geared, and rotates at the same speed as the magnetos, and wherein the two distributors are mounted on the cam shafts of the engine, Flg. 1 1s a front elevatlon of the engine showing the lgnltlOn view of the mechanical interrupter of Fig. 1 having a single pair of interrupter elements; Fig. 3 is a front view of a modified form of mechanical interrupter having two pairs of interrupter elements; and Fig. i

apparatus installed thereon; Fig. 2 is a front producing four speed the same effect as rain terrupter of l r1 1 A I Reterring t I a i, the engine 1 ms cylindois 2 arrangedin f l s 3 driv ng an operating Sllfl-ib increasing bevel chanical interrupter 6 is crating shaft and t d on the on meinagnetos 7, each 'flltlOXl currents per rotae speed he operating tion, are driven a shaft through distributors 9 are cam shafts of the to simultaneous nition current spective spark turn. As shown in rran god to re- E2, the mechanics interrupter of l i as single cain ins ober ll, with four cairn portions 12, Li'lfl operating shaft '1. There is a single pair of in terrupter elements, comprising the deflectable element 13 cooperative with the cam member to be separatedthereby from the normally stationary interrupter element l lat four equally spaced intervals per rotation of the operating shaft corresponding the four angular positions of maximum generation of the magnetos 7, As shown in Figs. 1 and 4:, the insulated terminals or the primary windings 15 of the two niagnetos are connected in electrical parallel by thewvires 16 to the interrupter element 14, Whereas the secondary windings 17' are connected by the wires 18 to the respective rotatable brushes 19 of the distributors 9.

At each period of ignition, the interrupter element 13 is separated from the element 1% by the cam member 11, thereby removing the common ground connection 20 from the circuits of both of the primary windings 15. Thus, since the two magnetos 7 are synchronized, the alteration of the circuits of the p'rimaiy vvindin thereof has substantially it those circuits were in dividually interrupted. Accordingly, igni tion voltages are simultaneously produced in the secondary windings 1'? of the two magnetos at each period oi ignition, and the secondary currents resulting therefrom conducted. through the respective distributors to independent spark plugs of each cylinder in turn.

In 3, two pairs of. interrupter elements are substituted "for the single pair of Fig. 2, but the two detlecta-ble elements 21 are simultaneously separated from. the nor mally-stationary elements 22 by the same cam member 11. Although this arrange ment permits independent connection of the two primary windings of the roa netos 7, and actually ii terrupts those circuits each period of igni on, it may have the disadva-n tage over the single pair of ele ments that in the fibre b-loclrs23 should T h e spark plugs and also having an operati o to different. e"tents, the sparks at the we spark plugs of each cylinder would not occur at exactly the same instant although they would occur substant ally simultano mg the housing around the operating a. The sparks from the two magnetos occur simultaneously tor Iauy adjusteven it the rotating members of the .1 to ma; News 7 would be. set or shouldbecome by Wear slightly displaced from milac angular positions at each or all of the in} on periods, vving described our invention what claim is z" 1. Tlhe-combination with an internal conu bustion engine having a cylinder with two shaft dri' en by it, of electric ignition up :atus producing sparks the spark plugs simultaneously, comprising two magnetos driven in synchronism with each other by the operating shalt, a. single mechanical interrupter driven by the operating;- shaft and constructed and arranged to simultaneously' alter the circuits of the two magnetos and produce i nition currents therein, and means for con acting the ignition currents to the respective spark plugs.

The combination with an internal coinbustion engine having a cylinder with two spark plugs and also having an operating shaft driven by it, of electric ignition apparatus for producing sparks the spark plugssimultaneously, comprising two mag netos geared to the operating shaft to run synchronously With each other, a single echanical interrupter driven by the operating shafts-rid constructed and arranged to simultaneously alter the circuits of the two spark plugs and also having an operating 4 shaft driven by it, of electrical lgnltlOll apparatus for producing sparks at the two spark plugs simultaneously,'- connprisinp two -magnet os geared to the operating shai't to run synchronously with each other, a single mechanical interrupter driven by the operating shaft and constructed and arranged to simultaneously alter the circuits of the two magnetos and produce ignition-currcnts therein, and means for conducting the tion-currents to the respective spark plugs, the two inagnetos being connected to the mechanical. interrupter in electrical parallel.

The combination with an internal cc busticn engine having e cylinder with t produce ignition currents spark plugs and also having an operating shaft driven by it, of electric ignition apparatus for producing sparks at the spark plugs simultaneously, comprising two magnetos independently geared to the operating shaft run synchronously with each other, a single mechanical interrupter mounted on the operating shaft and constructed and arranged to simultaneously alter the circuits of the two magnetos and produce ignition currents therein, and means for conducting the i nition currents to the respective spark P g 5. The combination with an internal combustion engine having a plurality of cylinders each with two spark plugs and also having a cam shaft and an operating shaft driven by the engine, of electric ignition apparatus for producing sparks at the twospark plugs of each cylinder, simultaneously, comprisin two magnetos geared to the operating sha t to run synchronously With each other, a, single mechanical interrupter driven by the operating shaft and constructed and arranged to simultaneously alter the circuits of the two magnetos and produce ignition currents therein, and two independent distributors mounted on the cam shaft to con duct the ignition currents to the respective spark plugs of each cylinder in turn.

6. The combination with an internal combustion engine having a plurality of cylinders each "with two spark plugs, and also having a cam shaft and an operating shaft driven by the engine, of electric ignition apparatus for producing sparks at the spark plugs of each cylinder simultaneously, comprising two magnetos independently geared to the operating shaft to run synchronously with'each other, a single mechanical interrupter driven by the operating shaft at the speed of the magnetos and constructed and arranged to simultaneously alter the circuits of the two magnetos and produce ignition currents therein, and two independent distributors mounted on the cam shaft to conduct the ignition currents to the respective spark plugs of-each cylinder in turn.

In testimony whereof we affix our signatures.

LEON W. ROSENTHAL. GUSTAVE J. LANG.

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