US1120315A - Magneto-operating mechanism. - Google Patents

Description

'L. F. KRISTUPEK.

MAGNET() OPERATING MBGHANISM.

APPLICATION FILED DEOJ, 1911. 1 1 20,3 1 5, Patented Dec. 8, 1914.

5 SHEETS-SHEET l.

L. I'. KRISTUPEK.

MAGNBTO OPERATING MBoHAmsM.

APPLICATION IILBDDEO. 1, 1.911.

1,120,315. i Patented Dec. 8, 1914.

SHEETS-SHEET 2.

L. KRISTUFBK.

MAGNET@ OPERATING MECHANISM.

APPLICATION FILED 1120.1, 1911. 1,120,315, Patented Dec.8,1914.

5 SHEETSSHEET 3,

L. F. KRISTUFEK.

MAGNET() OPERATING MEGHIANISM..

APPLICATION FILED No.1-, 1911.

1.120,315. Patented Dec. s, 1914.

5 SHEETS-SHEBT 4.

L. F. KRISTUPEK.

MAGNET() OPERATING MBGHANISM.

APPLICATION ELLE!) DE01., l911.

l y 15gg, 3 1 5 -d Patented Dec* 8, 1914.

s SHEETS-sums.

.inerme sfre'rns il-.i-ifrrifr orifice.

LADISLAV r. KBIsTUsr-K, o'FvcHicAGo, ILLINOIS, ASSIGNOR 'ro TAYLoB- E, BROWNZ'AND CLARENCE E. MEHLHOPE, or CHICAGO, ILLINOIS, COPARTNERS 'As FIigM- or BROWN e; MEHLHOPE.

MAGNETOPERATING MECHANISM.

Patented Dee. 8,' 1914.

Application fileii' December 1, 1911. Serial No. 663,292.

T0 all 'whom it may concer-n:

- Be itlniown that I, L .iiiisn/iv F. kiusfriil riait, zrsubject of the Emperor of Austria- Hungary, residing at Chicago, in the county of Cook and Stute of Illinois, here invent-ed a. new 'and useful Improvement in Magnet@ Operating Mechanism., of which the following is a specification.

''iyiiirention relates to mechanism for ing the ignition ofthe charges introduced into the cylinder, or. cylinders', of the' engine.

Myobjeets, generally stated, are to provide a. novel and simple construction of mechanism ofl the character referred to which shell be positive in operation, insure the production of the required current forV readily st-ii.i.t.iii, r the engine from the insigneto :ind iui'iningF it from the latter at low .speexhhe autoniiiticriliy loperative to effect corresponding actuation of .the rotary meniher of the magneto rehitii-e to the engineshaft Awhen the 'hitter reaches a. predetermined speec'l,` :ind shall he so constructed that vilirntiiin, jarring :ind wear 'of the parts of the mechanism shall he reduced, to the minimum.

Referring tov the accompanying driiw ings-Figure 1 is a View in verticiii sci-tional eleviiiimi ot' i magnet-o, v:in engine-driven shaft, mechanism constructediii -iiccordence with my invention for dri ving the magneto'- eriimture from seid shaft, eind it distribute-r for 'distributing the current `generzi-ted-hy the n izigrneto (zo the spziiiiiiig-devices of the engine-cylinders (not shown), the section heiner tnlfen :it the lines i on :indV Fig'. is :i section taken at the 'line or. l and viewed ini the direction of the arrow. Fig. 3 is a Section taken :it Vthe line a on lfig.- andV viewed in' the direction of the iiifro nisi'n shownl in Fig. 2, the seeti/(in-beingf taken :it a. line c orrospo ndirifg4 tothe ligen' on F ig. 1 :ind viewed in the dineetionof'the arrow, this view showing the .parts inn different position from thiit shoyvn'in- 2.'

Fig. 7 is :i view simile-r 'to AFig z3 ofthe mechanism therein s hown,-il1u`s t= ating this 'sol mechanism in i position corresponding to the 'position shown in Fig, 6.] .Fig'. 8 is a view similar to Fig. Sfofifthefmchanism therein shown, showing'thev position' vtli'zit the parts illustrated assume-.Whenthe' en gine is operating'sueiitly to i'utoiniitieally inove the niagneto-eriiturelre- Y t-.irding A:ind acceleratingfinchalsin.out of oper-ating position'. Fg:9 .isefpespeetiij'erien' of one of the 'magnetodriving ele'- inents rigid with the :ii-mature Fig. 10 is a similar view of'aam-deyice employed. VFig. 11 is a-siinilerview of a. rockdevice which cooperates with'scid'cm; and'.

Fig. 12, :i simile-r' view of tog'giennedlmn'ism connected with the .arma-ture of the magneto :ind through the vmedium of' which the movement of the latter is intermittently retarded relative to the driving means thcre' for and in opposition tothe 'ection of elastic mechanism.

I here chosen for'the purposes of illustretion a. mechanism, embodying-my' invention, for lise in connection with a Afour-eylii'ider,

'four-cycle engine, the driving element. of

the mechanism vfor actuation 'from the engine-shaft being geared to' the distributer in the ratio of two to one, and being l:id apted to he driven from the engine-Shaftnt the sanne speed as the latter, though it'will heVA understood that my invention may be utilized in any other internal-combustion enr eine regardless of the type thereof and the iiiimher of cylinders employed.

in the construction ilhistreted, ev inagneo is show-n at 13, the field magnets :ind

:ii-ina ture of which are represented at andj 15, respectively. A rotatable shaft through the medium of which the magneto-armature 15 is adapted to be driven, is represented at 16, this shaft, in practice, being driven from the drive-shaft of an internal-coinbustion engine the ignition system of which is supplied with electric current from the magneto, the speed at which this shaft is driven relative to the engine-shaft depending upon the type of engine to be supplied with electric current from the magneto, as is well understoodv in the art. The shaft 16 is rotatably mounted in a sleeve 17 journaled in a bearing 18 provided on a casing 19 connected with the magneto and into which the armature 15 extends, this sleeve being provided beyond the bearing 18 with a pinion 20 meshing with a gear 21 connected with the rotatable element 22 of an electric-current distributer 23 of a well-known type, which latter would, in practice, be connected up with the magneto 13 and the sparking devices (not shown) for the cylindersfor properly1 timing the sparking in the latter. The outer eiid of the sleeve 17 is counterborcd to afford an annular socket 24 into which a sleeve 25 surrounding the shaft 16 and lsplined thereon, extends. The outer shouldered end of the sleeve 25 is formed with a. peripheral groove 26 containing a ring 27 provided with radhilly-extending lugs 28 for attachment to a yoke (not shown), through the medium of which the sleeve 25 may be moved longitudinally of the shaft 16 and sleeve 17, the inner end of the sleeve. 25 containing a pin 29 which extends into a4 cam-slot 30 in the outer end of thel sleeve 17, whereby, upon shifting the sleeve longitudinally of the shaft 16, the sleeve 17 will be rotated independently of the shaft 1G in a direction depending upon the direction in which the sleeve 2-5` is moved for adjusting the rotary element 22 of the distrihuter 23 whi/le in operation for advancing or retaiding the spark as desi/red relative to the operation of the engine-pistons.

The inner reduced end 31 of the sleeve 17 is equipped with a disk 32 rigid therewitlq this disk being cfguipped with laterally-extending rods 253 shown as four in number and adjacent ones of which are arranged at an angle of 90'? to each other. The outer ends of i; e rods are connected with a ring $53!, and aiding between'thering 34 and disk 32 ami Journaled on the rods 33 are sleeves iV, the plate 32, ring A34 and rods 33 forming a cage secured to and rotatable with the slet-ve 17, which latter through the medium of the pin 99, rotates with the 4shaft 16. Secured to the armature 15 is a disk 36 carrying:r a plate 37 provided with a crank-extension 3S, and extending parallel with the plate 37 is a plate 39 which is provided with a crank-extension 40, the

plates 37 and 39 being connected together through the medium .of rods 41 having sleeves 42 journaled thereon and arranged preferably at angles of 90 to each other, the outer ends of the crank- extensions 38 and 39 being connected together by a stilbshaft 43, one end of which, represented at 44, extends beyond the member 40, the latter being equipped With a' pin 45-Which is concentric with the a'xis uponrvvhich the armature 15 rotatesl and'h'as journal bearing in a socket 46 in the inner end'of the shaft 16. The armature 15is operatively connected with the sleeve17 through the medium of coiled springs 47 which are connected at their opposite ends with the sleeves 35 and 42 as illustrated in Fig. 2. '.lhe disk 32 is provided withl a laterallyprojecting pinv 48 upon which a lever' 49 is pivoted, this lever being connected at its free end with one end of a toggle-lever 50 formed with a rule joint 51 and journaled at its opposite end on the end 44 of the stubshaft 43, the disk 32 being cut away as represented at 52 for the purpose of permitting 90 this connection of the toggle with vthe shaft 43 to be made and the movement of the parts, directly connected with the armature 15, with relation to the disk 32, for the purpose hereinafter described. Journaled on 95 the bearing 18 adjacent to the .toggle-mechanism 50 is a cam-device 53` formed of'diainetrically-opposed cam-portions54, each of which'is provided With a curved cam-surface 55 and a receding surface 5G intersecting the adjacent cam-surface v55, as illustrated in Fig. 5, and cooperating with the carri 53 is an arm 57 rigidl with, and extending at about at angle. of 90o to, the link 49, the arrangement of the parts described being such as to cause them, when in normal condition, to assume the positions illustrated in Figs. 3 and 5, the members of the' toggle 50 being yieldingly held in the positions illustrated in these figures, in which the joint of the toggle extends inwardly of its points ofeonnection with the lever 49 and shaft 44, by means of a coiled spring 58 surrounding the shaft 43, one 'end of this spi-ing being secured to the member 33, and the other end engaging with one section of the toggle 50 (Dig. 5).

ln the position of the parts described, the arm 57 which is rovided with a curved under surface 59 extends in close proximity 'to the curved surface 55 of one of the cam- .portions 54 of the cam 53 (Fig. 5), whereby,

lil)

(3() journaled on a pin (51 tixed in an endivall lh. ot the easing 1t) and yieldingly pressed downwardly by a spring thi, this dog bring adapted to eng ge with tho adjaeen: one ot shoulders oa provided on a tari; ol' the eain nl). '.lhe dog- UU operates to causethe eain :33, to all intents and purposes, to he rigid with they bearing 18 vvhon the rotary partis ot' the deriee are lotated to the right in Fig; 1, but permits the cam 53 to rotate to the feit in Fig. o in the event ot tori-,e dxerted against the Cain tending to move it in this direction.

'llie operation ot' the described mechanism is as follows: Rotation of the shaft 1o to the right in Fig. 3, as for instance in the Cranking of the engine geared to this shaft and in ronnertion with which the magneto is em ployed, operates lo rotate the sleeve 17, and the enge, torined of the disk 32, ring St, rods Ii' and .sleeves 33, to the right in Fig. 1. and as the plates 3o, `3T and 39 carried hr the. armature 15 arol connected with the rage through the medium oi the springs 47, rotation ot' the cage as described operates to also rotate the armature 15. 1n the initial. movement of the shaft 1li described, the arni 5T is caused to rido upon the adjacent; Cainportion 54, with the result of rocking tho lever l-f) to the left in Fig. 3 and @onseqnontly, through the nediuin of th(` toggle 5l), retarding the lnoven'ient o1u th armature 15 to the right in Fig', 3, relative to thol movement of tht3 shaft 16 and the cage con neeted therewith, thoirbr placing tho springs lT under tension. tarded nioven'ient olf the arn'iatnie 15 as described rontinnrs until th(` lrre end of the arln 5T (which latter, in its final movement against' the ranrportion Sil ot tho cani 323, assumes tho position illustratm'l in Fig. 7, passos the end of said eanrportion, whereupon` under the action ot the springs 47, it swings' inwardly, thereby porinitting the springs #17. which form elastic means eon riveting thel arnmture to the shaft 1G, to freely eseit on tho parts Carriod bvthearuiature 15 thn power stored in said springs during' tho movement. of the irui 57 awa'nst the. inrportion hereinhelbre de- 'llie manifest rosnlt of thix oporn ation ot the part@y as described is thatv ol" @a sing the armature in its initial moveimnt lo move slower than the @hatt 1V. in rfhieh moven'wnt power is. stored in tho Marions li'. whifh retarded niovenirnt ot' the ainiatur, 15 is followed by a Inofnentirr iirrrloration oie tho arirmlilre under the artion of the storod poner in these sg'iring's. thus resulting in tln prrwlnotinin of a current; ol` rolatiiel,v n eat intonsitv for prodnring a powerful spark at they olrolrioal torniinals in the 0ngine, in tho iartieulmillnstiatrd rinliodiinfnt oi mr invention the rotarding and af'- reloration of the armature 15 occurring The relativo re.

tvviee in each revolution of the shatt 16 by reason of the provision et two similar earnpor tions 1t is de bie that, fitter the engine has attained a certain speed, the arn'ialuro 1:3 he dri\en at a speed corresponding to that of the sha tt 1t), as distingnishrd from the variable speed deseribed, this being effected through the medium oi" the toggle 530, which lutter, under the notion of centrifugal force in opposition Lo [he spring 5&5, raused to ho nim ed to they position represented in. Fig. 8, in nhioh the arm .5T sn ung `to a position in which il el aars tin`A oanrporlions Sit in the rotations o the shat 1li, and thus :L Con'iparatively steady pull is exerted through the inodiuin of the springs "t7, upon the described rotary parts earrird by the armature 15, a pin (325 eairird on thuy outer aeo oi the disk 32 operating,r to limit the movement ot the toggle ill under the action ot eentril'lw'al torce, as stated.

From the 'foregoing desrription, it will be understood that the (fain 53 irre to he turned to the loft in Fig. 5, thisl feature ot Inv construction boing Vlesiralile as it; prevents iinpairinont o1' the parts oll the lneehanism in the ovent of the rotation thereof to the left in Fig; 5. as would likely he the ease in the e\ ent of' barkdire ol the engino, under which conditions tht' arin fi?, in its retro grano nioven'ient. n ould engage with the adjacent on-r-y ot' the cani-portions 54 and oporato to freely tir'n they earn 53 to the lett in Fig. 5.

1t. `will be understood that Where the magneto is used in eonnertion with an ,internat combustion enninr` whirh in its nse is not re quired to be operato-:l rapidly, the foaturo of antr'ilnatirally thrmving the arn'iatu-resre-Y tarding means out ot operative position need not be eini'iloved. this feature boing! only desirable here the engine in eonneel tion with nhinh they nnwhanisni is usr-d. is eansed to lio driven at a speed sullieient to produc@ the desired spark .vhrn the niagnetonrniatore lia.; rotar.Y movement corre spondingy; to that ot tho d rive-element there for. as di-'inguilwd from alternati. rrtard- 0d and i oli-lated niorenwnt.

'The l' dure ot driiin the disriliuter 523 from lho shaft lt?.k as i stinguislnd troni drivin@ it from lhax niunnrio-arnmuro. is ot' great advantage in invelianisni :ilI iliir han Hotel", as tie rol v :lenient oli lha divtrilr Utri' is sotvitvrl ,wwwmnililrtfl-k "with tlm shaft lll. i i wd lhoui tlil` alternate retarded and :rirrelrrateil niovenn'nlr it viozrld have it operated 'roin the armature l5. :ind tlnnf nohe. indue near ol' Ilw distributor in it@ drivin;f ronnrffions, and sueh operation of the distributor as will produre improper timing` ol" the spark Controlled liroln the distributor, is axoided. Furtherinore, this arranglfeinr-nt is advantageous less powerful accelerating means are required `l'or operating the 'movable member oi' the magneto than in those cases where the distributor lilre'vvisc intermittently accelerated.

rthe arrangement ot the springs as described serves to balance them relative to each other and thus avea r ot' the bearings for the rotatiiig parts ot the mechanism reouceil lo tue minimum.

While l have illustrated and described springs as 'forming the elastic means tor connecting ih" armature lli with the sha tt lil, l Ilo not rv vl; to he understood as intemlins;i to limit i mention o the use ol' springs, as any omr suitable means connecting the sha lf3 with the armature l5 and operating to store cneiu vvhen the armature is retarded ielative to the sha tt lo, may be cmployed.

llf'hile l. have illustrated a particular embodiment ot my invention, l do not wish to be understood as intending to limit my in ventien to such construction, as the same may be variously modified and altered ithout departing from the spirit of my invention What l claim as new, and desire to secure by Letters lfatent, is-

1. The combination with a magneto and a drivemember therefor` of elastic means connecting the rotary member of said magneto with said drive-member, moans connecting together said rotary member and said drive-member and operatinff, when actuated, to momentarily retard the movement of said rotary mem' er vivith relation to said drivemember in opposition to said elastic means, and means for actuating said rotary-member-retarding means, for the purpose set forth.

:2. The combination with a magneto and a drivesmember therefor, of elastic means operatively connecting the rotary member ot said magneto with said drive-mcmber, means connecting together said rotary member and said drive-member and movable therewith and operating, when actuated7 to momentarily retard the. movement of said rotary member relative to said drive-member in opposition t0 said elastic means, and a ramdevice extending into the path of movement of said rotary-member-retarding means for actuating the latter', for the purpose set forth.

3. The combination with a magneto and a drive-member therefor, of elastic means operatively connecting the rotary member of said magnet, with said drivemember, means connecting together said drive-member and said rotary member and movable therewith and operating, when actuated, .to momentarily retard the movement of said rotary member relative to said drive-member in opposition to said elastic means, said lastdiamed means including a operating, when actuated, to retira, e movement ot said rotary member, ani a relatively stationary cam interposed in path of movement of said rock-arm. toA the purpose set torth. l

#1. 'l'hc combination with a magneto and a drivc-fmeniber therefor, of elastic means operatively connected with the rotary member ot' said magneto and with said driveincmber and movable therewith, means connecting together said rotary member and said drive-member for momentarily retarding the movement ol' said rotary member relative to said djivemember and in oppo sition to said elastic means comprising a pivotallysupported lever operatively connected with said drive-member, a link-device connected with said lever and operatively coiinected with said rotary member, an arm operatively connected with said lever, and means cxtending into the path ot movement ot' said i arm tor actuating the latter, for the purpose set lorth.

5. rlhc combination vvith a, magneto and a drive-member therefor. of elastic means operatively connected with the rotary mem-- ber of said magneto and with said drivemeinber and n'iovable therewith, means operativcljvy connected with said rotary memm ber and vvith said drive-member for momentarily retarding the movement ot said rotary member relative to said drive-member and in opposition to said elastic means comprising a pivotallysupportcd lever operatively connected with said drive-member, toggle-members operatively connected with said first-named lever and with said rotary member, an arm rmeratively connected With said first-named lever, and means extending into the path ot movement of said arm for actuating the latter', for the purpose set forth.

'lhe combination with a magneto and a drive-member therefor, of elastic means connecting the rotary member of said magneto with said drive-member, and means for retarding the movement of said rotary member relative to said dri ve-member and in opposition to said elastic means including a lever pivotally supported on said drivemember and eccentric to the axis about which said drive-member and rotary member rotate and means tor operating said lever.

7, The combination with a. magneto and a drive-member therefor, otl elastic means connecting the rotary member of said mag neto with said drive-member, and means operatively engaging with said rotary member and saidr driveaneniber for retarding the movement of said rotary member relative to said drive-member and in opposition to said elastic means comprising a lever pivotally supported eccentric ot' the axis about which said Y-f-otary member and drive-mem 5.5 ing a pin projecti purpof-,ze set forth.

8. r1`he combination with a magneto and a drive-member therefor, ot' a. pin operatively connected with said drive-member and eccentric to the axis of rotation of the latter,

lo a pin operatively connected with the rotary member of said magneto and eccentric to its axis rotation, elastic means normally radially-disposrd and connected with said pms and through the medium of which said rotary member is driven from said drivemember, and means vt'or momentarily retardirg the movement ot said rotary member relative to said drive-member and in opposition to said elastic means, for the purpose 2o set forth.

9. The combination with a magneto and a drive-member therefor, of a pin operatively connected with said dri re-member and eccentric to the axis of rotation oit' the latter,

2.5 a pin operatiiely connected with the rotary member oi said magneto and eccentric to its axis of rotation, a normally radially-disposed spring connected at opposite ends with said pins and through the medium of which said rotary member is driven from said drive-member, and means for momentarily reta rding the movement of said rotary member relative to said drive-member and in opposition to said spring, for the purpose set 3 6 forth.

l0. The combination with a magneto and a drive-member therefor, of a pin operatively connected with said drive-member and eccentric to the axis of rotation of the 40 latter, a pin operatively connected with the rotary member of said magneto and eccenA tric to its axis of rotation, said pins extending normally in a straight line radialiy of said shaft; elastic means connecting said pine` and through the medium of which said rotary member is driven from said drivemember, and means for momentarily retarding the movement of said rotary member relative to said drive-member and in opposition to said elastic means, for the purpose set forth.y

11. The combination with a. magneto and a drive-member therefor, of a rotatable disk driven from said drive-member and carryn from its face, a pin eX- tending laterally Eom and eccentric with the rotary member of said magneto, a normally radially-disposed spring connected at opposite ends with said'r pins and through the medium of which said rotary member is driven from said drive-member, and means for momentarily retatdihg the ovement oil said rotary member relati 'e to said drivemember and in or position to said spring, for

6,5 the purposeset forth.

12. The combination with a magneto and a drive-mc iber therefor, of a rotatable disk operated by said drive-member, elastic means operatively connected with. said disk and with the rotary member of said magneto and operating to connect said disk and said rotary member together, means connecting,r together said disk and said rotary member and operating, when actuated, to momentarily retard the movement of said rotary member relative to said dish and in opposition to said elastic means, and means for actuating said last-named means, for the purpose set forth.

lI-. The combination with a magneto and a drive-member therefor, of elastic means operatively connected with the rotary member ot' said magneto and with said driveniember, means operatively connected with both said drive-member and with said rotary member, operating, when actuated, to momentarily retard the movement of said rotary member relative to said drive-member in opposition to said elastic means, and means 'l'or intermittently operating said rotary-member-retarding means, said last referred to means being movable, under the, action of centrifugal force, it'rom operating to non-operating position when the speed of said drive-member exceeds a predetermined speed.

14. The combination of a magneto, a ing provided. with a jourmii-bearing, a. drive-member journaled in said bearing, a cage operatively connected with said drivemember and formed of a ring and a disk` spaced apart and rods connecting said ring and disk together, a rotary member secured to the armature of said magneto to rotate therewith and extending into said cage, said rotary meo'iber being tin-med with crossiods. H'irings mim-civil with the cross-rods on e id cage and the cross-rods on said armature. means operati rely connected with said cage and with said rotatabio member operating, when actuated. to momentarily retard the movement of' said armature relative to said drive-member and in opposition to said springs, a cam-device journaled on said bearing and extendingr into the path ot movement of said armature-retarding means, and means for preventing' said cam-- device from rotating;v in the direction of normalv movement of said cage.

15. The combination with a magneto and a drive-member therefor, ot elastic means connecting the rotary member of said magneto with said drive-member. means, including collapsible toggle-members, operatively connected with said drive-member and with said rotary member for momentarily retardimgr the` movement ot' said rotai'y member relative to said drive-nn-mher in opposition to said elasticl means. and means for intermittently operating said rotary--member-retarding means, for the purpose set forth.

16. The combination with a magneto and a drive-member therefor, of elastic means operatively connecting the rotary member of said magneto with said drive-member, means operating, when actuated, to momentarily retard the movement of said rotary member relative to said drive-member and in opposition to said. -elastic means, a rotatably-mounted cam-device for actuating said retarding-mcans, and means for holding said cam-device against forward rotation, but permitting it to be rotated. in the opposite direction for the purpose set forth.

17. The combination with a magneto and a drive-member therefor, of elastic means operatively connecting the rotary member of said magneto with said drive-member, means operatively connected with said drive-mcmbcr and with said rotary member and operating, when actuated.. to retard the movement of said rotary member relative to said drive-member in opposition to said elastic means, a rotatably-mounted cam-device extending into the path of movement of said rotary-memberretarding means and operating to actu-ate the latter when engaged thereby, and means for holding said cam-device against forward rota-tion, for the purpose set forth.

18. The combination of a magneto, a drive-member, means for driving the rotary member of said magneto from said drivem member with an alternately retarded and accelerated movement relative to the movement of said drive-member, an electric-cur rent distribut'er, formed with a rotary element, and means for communicating to said rotary element a movement corresponding with the movement of said drive-member.

19. The combination of a magneto, a drive-member, means for driving the rotary member of said magneto from said drivemember with an alternately retarded and accelerated movement relative to the movement of said drive-member, an electric-Cun rent distributer formed with a rotary element, and means for driving the rotary member of said distributor direct from said drive-member as distinguished from driving it through the rotary member of said magneto, whereby the rotary member of said distributer is given a movement corresponding with the movement of said driveanember.

20. The combination with a magneto and a drive-member therefor, of elastic means connecting the rotary member of said magneto with said drive-member, means, incl luling outwardly collapsible toggle-members, operatively connected uith said dri ifo-naar. bei' and .vith said rotary membri ifo" nio-- mentarily retarding the md'anenff, of said rotary member relative to said drive-member in opposition to said elastic means, and means for intermittently operating said rotary-member-retarding means, for the pur pose set forth.

21. The combination with a magneto and a driveanember therefor, of diametricallyopposed normally radially-extending olastic connections between the rotary member of said magneto and said drix e-member, and means for momentarily retarding the Inovement of said rotary member relative to said driveanember and in opposition to the action of said elastic connections.

The combination with a magneto and a drive-member therefor, of diametrically-opposed normally radially-extemling springs connected with the rotary member of said magneto and with said drive-member, and means for momentarily rctaiding the movement of said rotarv member relative to said drive-member and in opposition to the action of said springs.

Q3. The combination with a magneto and a dri ve-member, of elastic connections balanced in normal condition between the rotary member of said magneto and said drive-member, aid means for momentarily retarding the movement of said rotarymember relatiie to said dri\'emember and in opposition to the action of said elastic connections.

24. The combination With a magneto and a drive-member, of normally radially-disposed springs in balanced condition connecting the rotary member of said magneto with said drive-member, and means for momentarily retarding the movement of said rotary member relative to said drivelnemba' and in opposition to the action of` said springs.

The combination with a magneto and a drive-member therefor, of elastic means operatively connecting the rotary member of said magneto with said drive-member, means operating, when actuated, to momentarily retard the movement of said rotary member relative to said drive-member and in opposition to said elastic means, a rotatable cam for actuating said retardmeans concentric of the axis upon which said drive-member rotates, and means for holding said cani against forward rotation, for the purpose forth. y

(3. The com. ation with a magneto and a ilrivo-nlcmber therefor, ot' elastic means connected with the rotary member of said magneto and with said drive-mcmber,means for momentarily retarding`v the movement of said rotary member relative to said drivenwmbvr and in opposition to said elastic moans. including an arm, and a cam i, the bath of movement of said arm for actuating said retarding means, the copcrating surfaces of said cam and arm being curved and describing arcs of substantially the Dit! same radius, whereby a broad bearing of said arm on said cam is afforded.

27. The combination with a magneto and a drive-member therefor, of elastic means connecting the rotary member of said magneto with said drive-member, means, including toggle-meinbirs operatively connected with said drive-member and With said rotary member for momentarily retarding the movement of said rotary member relative to said drive-member in opposition to said elastic means and means on said toggle-members tor preventing them from collapsing in one direction, and means for intermittently operating said rotarymember-retardingy means, for the purpose set forth.

Q8. The combination with a magneto and a drive-member thereforof elastic means connecting the rotary member ot1 said magneto with said drive-member, means, includingr toggrie-members operatively connected with said driremember and with said rotary member for momentarily retarding the niovemii-nt oi said rotary member relative to said drive-member in opposition to said elastic means. means on said toggle Jr'or i'nexentingr it trom collapsing in om direction, and meins 'for yieldingly holding said toggle-members from collapsing in the opposite direction, and means for intermittently operating said rotary-member-retarding means. for the purpose set forth.

QS). The combination with a magnet-o and a drivc-memiafr therefor, of elastic means connecting the, rotary member of said magneto with said drive-member, means, including toggle-nummers operatively connected ivith said drive-member and with said rotary member for momentarily retardma* ihe movement ot said rotary member relative ro said drire-mmnber in opposition to ,said elastic means and means i'or holdingr said toggle-members in extended condition against collapsing when said drivemeniber is rotatingr below a predetermined speed, and means' for intermittently operating said mlarjynieniber-retarding means.

30. The combination with a magneto and a drive-n'iember therefor, of elastic means ermneeting the rotary member of the magneto with the said drive-member, togglemembers having pivotal operative connection with sai-l drive-"member and with said rotary member eccentrically of the axis about which said members rotate, means connected with .said toggle-members operating, when actuated, to retard the movement ot' the latter and said rotary member relative to said drive-member and in opposition to said elastic means, means operating to hold the members ot' said toggle against eollapsing in one direction and to cause the joint between said toggle-members to extend intermediate the axis about which said drive-member rotates and a line passing through the points of support for said toggle-members, and means for actuating said toggle-actuating means.

3l. The combination with a magneto and a drive-member therefor, of elastic means connected with said dri ve-member and the rotary member of said magneto, means for momentarily retarding the movement of said rotary member relative to said drive` member and in opposition to said elastic means, an electric-current distributer formed with a rotary member, means for driving the rotary member of said distribu ter from said drive-member, and means for adjusting the position of said last-named means relative to said drive-member.

'The combination with a magneto and a drive-meml'er therefor, of elastic means ronnected vwith said drive-member and the rotary member of said magneto, means formomentarily retarding,r the movement ot said rotary member relative to said drive-member and in opposition to said elastic means. an electric-current distributer formed with a rotary member. a rotatable member through the medium of which the rotary member ot' said distributesl is actuated, and shiftable means for driving; said rotatable member from said drive-member operating, when shifted. to change the angular position of said rotatable member about its axis relative to said drive-member.

The combination with a magneto and a drive-member therefor, of elastic means connected with said drive-member and the rotary member ot' said magneto, means for momentarily retarding the movement of said rotary member relative to said drivemember and in opposition tosaid elastic means, an electric-current distributor formed with a rotary member, a sleeve rotatably mounted on said drive-member, means operated by said sleeve for rotating the rotary member of said distributer, a shiftable member rotatable with said drive-member, means on said shiftable member for engaging with and driving said sleeve and operating, when said shittable member is shifted, to vary the angular position of said sleeve about its axis relative to said drivemember, and means for shifting said shiftable member.

3i. The combination with a magneto and `a drive-member therefor, of a normally radially-disposed spring connecting the rotary member of said magneto with said drive-member, and means for momentarily retarding the movement of said rotary member relative to said drive-member and in opposition to the action of said spring.

35. rlhe combination with a magneto, of a rotatable member. elastic means connected with said rotatable member and the rotary member of Said magneto, a driving element for said rotatable member, means for ad justing said rotatable member relative to said drii ing element, means for momentaril)v retarding the movement o tbe rotary member of said magneto relative to said rotatable member and in opposition t0 said elastic 1n ans, an electric current distributor formed with a rotary member, and means for driving the rotary member of said distributer from said rotatable member.

,136. The combination with a magneto, of a rotatable member, elastic means connected with said rotatable member and tbe rotary member of said magneto, a driving element for said rotatable member, means for axially adjusting said rotatable member rela tive to said. driving element, means for momentarily retarding tbe movement of the rotary member ot' said magneto relative to said rotatable member and in opposition to said elm-.tie means, an electric current dis tributer formed ivitb a rotary member, and means for driving the rotary member of said distributer from said rotatable member.

3T. The combination with a magneto, of a rotatable member, elastic means connected with :said rotatable member and the rotary member of said magneto, a driving element for said rotatable member, shiftable means for driving said rotatable member from said driving element operating, when shifted, t0 axially adjust said rotatable member relative to said driving element, means for momentarily retarding the movement of the rotary member of said magneto relative to said rotatable member and in opposition to said elastic means, an electric current distributer formed with a rotary member, and means for driving the rotary member of said distributer from said rotatable member.

38. The combination with a magneto and a drive-member therefor, of an elastic connection between tbe rotary member of said magnet and said drive-member, and means for momentarily retarding the movement of said rotary member relative to said drive member and in opposition to tbe action of said elastic connection. said elastic conneetion being constructed and arranged to .vieldingly resist tbe movement of said rotary member beyond normal position wbile traaeiing under be impetus transmitted to it by tbe operation of' said elastieconnection.

LADISLV F. KRISTUFEK. In presence of"- L. llmsLAn, R. Schumann.

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