US1246128A - Ignition mechanism. - Google Patents

Description

A. G. McCALEB.

IGNITION MECHANISM.

APPLICATION FILED JULY 31, ms.

Patented Nov. 13, 1917.

4 SHEETS-SHEET I- I .A Y... .311315 CUII A. G. MCCALEB.

IGNITION MECHANISM.

APPLICATION FILED JULY3h19I6.

Pten'ted Nov. 13, 1917.

4- SHEETS-SHEET 2.

A. G. McCALEB.

IGNITION MECHANISM.

APPLICATION FILED JULY 3h 19m.

Patented Nov. 13, 1917.

' '4 SHEETS-SHEET 3;

v UNITED STATES PATENT onmon.

ALBERT G. MCJGALEB, OF CHICAGO, ILLINOIS, ASSIGNOR TO WEBSTER ELECTRIC COM- PANY, OF RACINE, WISCONSIN, A CORPORATION OF WEST VIRGINIA.

- IGNITION MECHANISM.

l Specification of Letters Patent. Pat t 13, 7

Application iiled July 81, 1916. Serial No. 112,252.

To all whom it may concern:

Be it known that I, ALBERT G. MGCALEB,

for internal combustion engines, and particularly to that class of apparatus wherein w an oscillating magneto and a pair of make and break spark electrodes are caused-to operate in timed relation to each other to produce sparks at the proper times withln the combustion chamber of an associated inv ternal combustion engine.

In preferred forms .of apparatus of the class to which my invention relates the magneto and spark electrodes are mounted upon an integral bracket in such manner, that to all intents and purposes the ignition apparatus constitutes aunitary structure. In this type of apparatus an engine driven actuator, preferably a reciprocating push rod, I

operates at intervals to oscillate the magneto rotor against the tension of. a strong spring, or pair of springs, and then to release the rotor whereupon the said spring means. operates quickly to return the rotor to normal position and thus to generate a current in the generating windings of the magneto, means-being provided to e'fl'ect the operation of the electrodes to permit the passing of a spark'at the peak of thrurrent wave generated in the magneto windings. The several parts are, of course, so arranged and operated that the spark passes at the proper instant in the cycle of engine operation;

One of the objects of my invention is to V tery current when the magneto and its operating'spring means are removed from the bracket for repairs, or any other purpose.

Another object of; my invention 1s to provide means whereby when the magneto is removed from the structure the spark electrodes are automatically adjusted for battery 1gn1t1on or, in other words, so arranged that they normally stand quite widely separated when batteries are the source of current.

' A further object of my invention is to provide' an arrangement and combination of parts 'whereby to obviate the excessive pounding of the movable electrode heretofore inherent in apparatus of the class to which my invention relates.

A further object of my invention is to provide an arrangement such that the-improvements of my invention may be adapted to existing forms of oscillating magnetos.

These and other featuresof my invention are more fully set forth in the following detailed description wherein reference is made to the accompanying drawings in which, I

Figure 1 is a top plan view of an apparatus embodyinggthe improvements of my invention;

Fig. 2 is a side 'elevational viewiof the apparatus shown in Fig.1, that portion of the bracket which supports the guide roller for the reciprocating push rod being broken away more clearly to reveal those parts of the mechanism with which my invention is moreparticularly concerned;

Fig. 3 is an enlarged detail View, partly in section and partly in elevation, taken on the line 3'3 of Fig.2 and looking in the direction indicated by the arrows;

Fig. 4 is a view similar to .Fig. 3 illustrating the positions assumed by the several parts when the magneto is removed and the v apparatus'is in'condition to-be operated with battery current:

. Fig. 5 is a detail view taken on the line 5-5 of Fig. 3 illustrating how the movable electrode is journaled in the bracket;

' Fig. 6 is a sectional view taken on the line 66 of'Fig. 3 and illustrating how the stationary electrode may. be mounted in the bracket;

Fig. 7 is a fragmentary elevational view of a modified embodiment of my invention;

Fig. 8 is a detail view partly .in section and partly in elevation taken on the line 88 of .130. v known to those skilled in the art.

I and partly in elevation, taken on the line F -10 of Fig. 1 and looking in the direction indicated by the arrows.

Similar characters of reference refer tosimilar parts throughout the several views.

-f Referring first to Figs. 1 to 6 inclusive at'lli'have illustrated an integral bracket arranged to-be secured'to an engine cylinden Jby bolts, or other suitable securing 5 means, extending through apertures 1212 in the vertical plate 13 of the bracket, the plate 13 having formed'integral therewith a "plug-14 arranged to extend through an aperture in the engine cylinder in a manner well ed by the bracket and extending through the .fplug 13 is a stationary electrode 15 suitably insulated from the bracket, as by a sleeve of insulation indicated at 16. The'electrode- 15 carries a suitable contact point arranged to cooperate with a corresponding contact point carried by a movable electrode presently to be described and at its outer end the electrode 15 is provided with a suitable terminal .clip 17. Disposed adjacent'the stationary electrode 15 is a movable electrode 18 journaled' in the bracket, as is, perhaps, most clearly illustrated in Fig. 5. Fixed upon .he outer end of the movable electrode 18 is an arm 19 which, at its free end, carries an adjustable screw or anvil 20. A helical spring 21 disposed around the outer end of the movable electrode and acting between the bracket and the arm 19, as is most clearly shown in Fig. 5, serves to retain the beveled shoulder at the inner end ofthe movable electrode in engagement with the corresponding beveled seat of the plug 14 and thus effectually serves to prevent loss of compression around the movable electrode. The spring 21, moreover, tends to hold the contact point at the inner endof the movable electrode-in engagement with the corresponding contact point carried by the stationary electrode 15.

It will be noted that the bracket 11 affords a laterally projecting shelf upon wh ch is mounted an oscillating magneto, indicated by the reference character 22, removably secured to the bracket by a plurality of nuts ried by the magneto magneto may 23-23 which cooperate with stud bolts carframework and extenddownwardly through apertures 1n the shelf afforded by the bracket.

be of any suitable construction, I'prefer that it shall be of the unwound rotor or inductor type now generally known Support- Although'the a shaft 24 upon the outer end of which (Fig. 5) 1s fixed a yoke 25. Acting between .the yoke 25 and stationary'posts 2626 carried by the magneto frame work are the comparatively heavyand strong helical springs 2727 which normally retain the magneto rotor in a certain position and which operate the .rotor to generate an ignition current whenever the rotor is moved by a suitable engine driven actuator against the action of" by removing the nuts 23.23 by which the magneto is secured upon the bracket. Ex tendlng laterally from the bracket, as is most clearly. illustrated in Fig. 1, is an arm 30 which serves to support a guide'roller 31 onwhich rides an engine driven push rod 32. The push rod 32 is reciprocated from the engine, in a manner well known in the art, to engage the push finger 29, move the latter through an angle of approximately 30 and there release it, whereupon the springs 27-27 associated with the magneto rotor serve quickly to move the rotor to normal position and thus to generate a current within the generating windings of the magneto. I will state that the push rod 32 is in practice provided with a. cam, not shown, which engages with the roller 31 to throw the push rod out of engagement with the trip finger 29 when the trip finger has reached the position at which it is tobe-released. Moreover, the roller 31 is desirably eccentrically mounted and provided with an adjusting lever 33 whereby the instant at which the push finger 29 is released from the push rod 32 may be varied within certain limits to advance or retard the operation of the magneto. These last mentioned features are, however, well known in the art and need not, therefore, be fully described and illustrated by-me in this specification.

As is most clearly illustrated in Figs. 1, 2, and 4, the vertical plate 13 of the bracket has formed integral therewith a hollow boss or bearing 34 in which is journaled a short shaft 35 the axis of which is coincident with the axis of the magneto rotor shaft 24. Keyed upon'the shaft 35 is a member 36 which ,we may term a hammer and which has formed integral therewith an arm 37disposed in alinement with the adjustable screw or anvil 20 carried by the movableelectrode operating arm 19. A spring"=38 acting between the bracket and the arm 37 of the hammer normally tends to move the arm 37 into engagement with' I 2, .3, and 4, isla-lug41 lying in the path of the" screw or anvil 20, as is most clearlyillustrated in Figs. 3 and 4. Attention is dlrected tothe fact that the spring 38 is of greater. strength and tension than the spring 21 associated. with the movable electrode,

but that'thei' spring .38 is. of much less ten sion and strength thanthe relatively large springs 27-27 associated-with the magneto rotor 'shaft. i I V The hammer 36 comprises an upwardly extending fingeri39 having a portion 40arrangednormally .to extend over thegap betweenthe adjacent ends of the alining shafts 24 and to lie behind the magneto push finger -29,as, is most clearly illustrated in Figs. 2-=and 3. Carried by the bracket bear- 4 ing '34, as lS mTQSt clearly illustrated in Figs.

' the hammer" finger 39. The purpose of this .lug41-will1presently be made apparent.

When themagneto is positioned upon the 1 bracket, as shown in Figs. 1 and 2,'a'nd when the laterally extending portion of the hammerfing er'39 lies behind the rotor push finger 29, as illustrated in Fig.3, the hammer is held in the position shown in Fig. 3 due to the fact that the spring 38 associated with the hammer is of less tension than the comparatively strong springs 27-27 associated with .the rotor shaft. 3

When" the magneto is made use of an insulated conductor 42-connects the'insulated electrode 15 with one side of the magneto generating winding or windings, it being understood that the other side of the generating winding or windings is grounded to the magneto frame and thence to the bracket and movable electrode in a manner well known intheart. 40.

.shown in the drawingsand the-engine is "When the magneto is in the position running the operation of the mechanism is as, follows: The reciprocating push rod is moved through suitable mechanism, not

shown, to engage the magneto push finger I 29 and to move the latter and the magneto rotor against the tension of the relatively heavy' magneto rotor springs 27-27 and i so through an angle of approximately 30. VVhen the magneto push finger 29 is thus moved by the engine p'ush rod the hammer 36 is likewise moved through an angle of 30 due ,to the fact that the portion 40 of the hammer finger 39 lies behind and against the magneto-push finger 29, This movement of the hammer 1s, of course, accomplished in oppositionto the tension of the spring 38 which is interposed between the 'bracke't and the arm 37 of the. hammer. j

\PVhen the magneto is employed I prefer to have the electrode contacts normally closed,

'orsubstantially closed, and it will be understood that when the hammer and magneto push finger are moved through an angle of 30 by thereciprocating push rod, as just explained, the electrode contacts arepermitted to remain closed. After the mag 'neto push rod andvthe hammer have been moved through an angle of substantially 30, as just explained, the push rod slipsoif of the push finger 29 whereupon the magneto rotor and parts connected therewith are quickly returned to normal position and this movement of the rotor serves to generate a current in the windings of the I magneto. As the rotor moves'toward normal the push finger 29 is, of course, returned to normal and as the; push finger 29 returns to normal mal position, the spring 38 associated with the'hammer serving 'to keep the portion i0 of the hammer finger 39-clo'sely in engagement with the rear side of the. push finger 29 as the parts return to normal; Due to the inertia of the rotor it not only returns to the hamer'is alsoreturned toward its nornormal position, but goes slightly therebeyond and thus thegpnsh finger 29 and the hammer are carried slightly past normal on their return movement. As "soon as the hammer 37 reaches its normal position, 01"

reaches a position slightly past normal, it engages the adjustable screw or anvil 20 of the movable electrode arm 19 and thus effects the separation of the electrodes and permits the passing of a spark. III; will be understood that the several parts of the mechanism are so timed andoperated that the spark occurs when needed within the engine cylinder. and that the separation of the electrode contacts occurs at the peak "of the current wave generated by the magneto:

'It will thus be seen that the hammer 36 serves to efl'ect the separation of the electrodecontacts in timed relation to the rotor. However, theseparation of the electric contacts is accomplished by the energystored in the, comparatively weak spring 38 and not by the energy stored in the heavy magneto springs 27. 27. Thus the mo'vable .electrode is not subjected to the excessive pounding which would be present were theenergy stored in the large springsy 27-27 utilized to effect the separation of the electrode contacts. It will be understood that in the normal runningof the engine the operation described is repeated toproduce an ignition spark wheneverrequired. I may say at this point that in order to produce the starting .spark I prefer to. employ a starting lever of the type shown and'described in' United to lV alter Brown on January 25, 1916.

-\Vhenever it becomes necessary or deslrable to remove the magneto and its operating springs 2727 for repairs, or for any other purpose, the retaining nuts 2323 are re- 1 moved and the magneto structure lifted off of thebracket. When the magneto is thus the electrode contacts are quite widely sepa-' rated. It is, of course, understood that it is desirable that the electrode contacts be normally open when the igniter is used in connection with battery current. Attention is directed to the fact that when the hammer lies in the position shown in Fig. 4, that is,

' with the fi'ge 39 thereof in engagement with the lug 41 the portion 40 of the hammer finger 39 occupies the same position as was formerly occupied by the magneto push finger. The apparatus is now in condition to be operated with battery current and one side of the battery may be electrically connected with the stationary or insulated elec trade 15 and the other side of the battery may be connected with the bracket, as by leading a conductor to 'a clip 43 which is in electrical contact with the bracket, as shown in Fig. 3.

With the mechanism adapted'for battery current, as just explained, when the engine in Figs. 7 and s, I will a. that thismod'jfi cation does not difl'er essentially from the arrangement of Figs. 1 to 6. inclusive, except.

in both directions.

ositively connected during their movement In the arrangement shown id Figs. 9 and 10 the magneto push finger is illustrated at 45 and the electrode hammer at 46. The up wardly extending finger of the hammer is provided with a face 47 arranged to lie beside and slightly behind the forward face of the magneto push finger. A laterally extending portion 48 formed integrally with the upwardly extending finger of the hammer engages behind the push finger when the magneto is employed; When this arrangement is used I prefer to employ a recipro-' eating push rod having an end as wide as the distance across both the push finger and the surface 47 of the upwardly extending finger of the hammer. In operation, when the magneto is employed, the push rod shown at 49 engages the push finger and operates the mechanism in precisely the manner hereinis running the operation is as followsa Tlia reciprocating push rod 32 engages the portion 40 of the hammer arm 39 in precisely the same manner as the push rod engaged the push finger 29 when the magneto was employed. The push rod serves to move the hammer through an angle of approxlmately 30 and against the tension of its associated spring 38 and then to release the hammer. When the hammer is moved under the action of the push rod, as just explained, the electrodes are permitted to engage and thus close a circuit through the electrode contacts. the reciprocating push rod the spring 38 associated with the hammer qulckly moves the hammer to the position shown in Fig. 4 and this movement of the hammer causes the arm duce the initial or starting. spark it is only I necessary to manually move the arm 37 against the action of its spring 38 and-then release it. Due to the fact that the spring 38 is comparatively light this is a simple matter to accompllsh.

Referring now to the modification shown finger.

When the hammer is released fromto 6. When the magneto is removed the lug 41 normally retains the surface 47 of the upwardly extending hammer finger in the position formerly occupied by the magneto push When the magneto is removed the reciprocating rod 49 cooperating with the surface 47 of the hammer serves to operate the mechanism in the manner described in connection with Figs. 1 to 6.

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

I 1. An ignition mechanism of the class described comprising a bracket, spark elec-' trodes carried by the bracket, a magneto and spring means for operating the same, both removably supported by the bracket, an engine driven push rod for moving the magneto rotor in opposition to said spring means, and. means controlled by the magneto for operating the-electrodes and determining the time of operation thereof, the several parts being so related that the push rod operates the electrodes and determines the time of operation thereof when the magneto and the spring means for operating the latter are removed.

2. An ignition mechanism of the class described comprising in combination spark electrodes, a magneto positioned adjacent before explained in connection with Figs. I

the spark electrodes, an engine driven actuator arranged to engage the magneto rotor,

I spring actuating mechanism for the magneto rotor arranged to snap the latter to ranged to move the magneto rotor against the action of said spring means and then release it whereupon the magneto rotor is returned .to normal by its associated spring means, means whereby the electrodes are operated whenever the rotor is thus moved under theaction of said spring means, and a member arranged to be engaged and released by the engine driven actuator similarly to the magneto rotor to effect theoperation of the electrodes when the magneto and its aforesaid spring means are removed from the bracket.

4. An ignition mechanism comprising a bracket, spark electrodes supported by the bracket, a magneto removably mounted upon the bracket, said magneto having a rotor shaft, means normally tending to hold the rotor shaft in a certain position, a push finger on the rotor shaft, an engine driven actuatorarranged to engage said push finger to move the rotor shaft and release it whereupon the rotor shaft is returned to normal' by its associated spring means, means for separating the electrodes when the rotor shaft is returned to normal, as

aforesaid, and a member carried by the bracket arranged to be engaged and released by the engine driven actuator similarly, to said push finger to control'the operation of {said electrodes when-the magneto, its push finger, and the spring means for operating the magneto rotor are removed from the bracket.

5. An ignition mechanism comprising a bracket arranged to be secured to an engine cylinder, a movable spark electrode carried by the bracket, a magneto removably mounted on saidbracket, spring means normally holding the magneto rotor in a certain posit-ion, engine driven means ar:

ranged to engage .the rotor, move and release it, whereupon said spring means returns the rotor to normal, and means whereby the movable electrode is actuated when the rotor is thus returned by Its spring means aforesaid, together with means carried by the bracket arranged to be engaged by theengine driven actuator, moved and released, similarly to the rotor to control the operation of said movable electrode when the magneto and its aforesaid spring means are removed from the bracket. I I

6. An ignition mechanism comprising in combination a bracket adapted to se' cured to an engine cylinder, a movable electrode supported by the bracket, a magneto removably mounted upon the bracket, spring means associated with the magneto rotor, engine driven means arranged to oscillate the rotor against the action of its associated sprlng means and then to release it whereupon said spring means returns the rotor to normal, means whereby the movable elec-' trode is operated'when the rotor is returned by its spring means, and means carried by the bracket arranged to be operated and released by the engine driven means similarly to the movable electrode to operate the rotor when the magneto .and its associated spring means are removed from the'bracket.

7. An ignition mechanism comprising in combination stationary and movable spark electrodes, a magneto, spring means normally retaining the magneto rotor in a certain position, engine driven means adapted to move the magneto against saidspring means and then to release it whereupon the magneto rotor is returned to normal by its assoclated spring means,-means whereby the movable electrode'is operated when the rotor is returned to normal as aforesaid, and- "means permanentlyassociated with the movable electrode arranged to be engaged, moved and released by the engine driven means similarly to the rotor when the-magneto and its associated spring-means are removed from the combination.

. 8. A mechanism of the class described comprising in combination a bracket,,a movable electrode carried by the bracket,--a magneto removably supported by the bracket, spring means acting between the magneto framework and rotor adapted to retain the latter in a certain position, engine driven means adapted to move the rotorajg'ainst the action of said spring means'and then to release it whereupon the rotor isr'eturned to normal by the sprlng means aforesald,

means whereby the movable electrode is operated when the rotor is thus moved by the spring means aforesaid, and means'permanently carried by the bracket arranged to be engaged, moved and released by the engine driven actuator similarly to the rotor when the magneto is removed from the bracket.

9. Mechanism of theclass described comprising in combination abracket adapted to be carried by an engine cyl1nder,a movable electrode carried by the bracket, a mag neto removably mounted on the bracket,

spring means normally tending to hold the its associated spring means are removedfrom the bracket.

. 10. mechanism of the class described comprising in combination with spark electrodes a magneto, spring means normally "tending to hold the magneto rotor in a certain position, engine driven means arranged electrodes when the ma rotor push finger to efiect the operation of the electrode when the magneto is removed.

:to engage the rotor, move and release the same whereupon the rotor is returned to nor- 1 mal by said spring means, a spring impelled member for operating said electrodes peranen'tly associated with the electrodes and normally controlled by the magneto rotor, but arranged to be u aged, movedand released by the engine riven means and retractedby its spring means to operate the etc and spring meanslassociated with the rotor thereof are removed from the combinatibn.

11. In an. ignition mechanism the combination with a bracket adapted to be secured to an engine cylinder of a movable electrode carried y the bracket, a magneto removably supported by the bracket, spring means acting between the ma neto framework and rotor arranged normally to'retain the rotor in a certain position, a push finger on the rotor on that side of the magneto adjacent the electrode, engine driven means arranged to engage,move,and release the rotor push finger, a hammer for the movable electrode supported by the bracket, said hammer normally lying against the rotor finger and movable therewith when the latter is moved by the engine driven means, spring means normally tending to cause the hammer to engage the movable electrode, said hammer arranged to be engaged, moved, and released by the engine driven means similarly to the 12. An ignition mechanism of the class described comprisin in combination with a bracket adaptedto e secured to an engine cylinder a movable electrode carried by the bracket, a magneto removably supported by the bracket, spring means normally tending to hold the magnetorotor in a certain position, a push finger on that side of the magneto adjacent the electrode, a hammenfor "thelmovable electrode carried by the bracket,

' a spring tending to move the hammebtoward the movabl electrode, a reciprocating.

rotor push finger, said hammer normally" 1 lymg against and slightly behind the rotor push finger, but adapted to take the position normally occupied by the rotor push finger and to be operated by the reciprocating rod similarly to the rotor push finger when the magneto is removed.

13. An ignition mechanism of the class described comprisin in combination with a bracket adapted to be secured to an engine cylinder, a movable. electrode carried by the bracket, a magneto removably mounted on the bracket, spring means normally retaining the magneto rotor in a certain position, a push finger on the magneto rotor, an engine driven push rod arranged to engage, move, and release the push finger, a hammer mounted on the bracket, a sprm associated with the hammer normal-1y tendmg to cause the hammer to engage the movable electrode, said hammer normally being held against and slightly behind the rotor push finger and movable therewith, and an abutment carried by the bracket adapted when the magneto is removed to stop the hammer at the position normall occupied by the rotor push finger where y said hammer is rendered capable of being engaged, moved, and released by the engine driven means similarly to the rotor push finger.

14. In combination with a bracket adapted to be secured to an engine cylinder, a movable electrode carried by the bracket, a magneto supported by the bracket, spring means acting between the magneto framework and rotor normally holding the latter in a certain position, a push finger on the rotor on that side of the magneto adjacent the electrode, a hammer mounted on the bracket on an axis substantially co-incident with the axis of the rotor, spring means acting between the hammer and bracket tending to move the hammer against the electrode and normally holding the hammer against the rotor push finger, and an engine driven push rod normally adapted to engage, move, and release the rotor push finger, but arran ed similarly to engage, move and release the hammer when the magneto is removed.

15. An ignition apparatus comprisingmovable electrode and normally holding the hammer against and slightly behind the rotor push finger, and. an engine driven member arranged normally to engage, move,

the combination.

and release the rotor push finger,but adapted similarly to engage, move, and release the hammer when the magneto is removed from 16, In an apparatus of the class described the combmationwith a bracket adapted to be secured to an engine cylinder, of stationary and movable spark electrodes, anarm on the movable electrode, spring means tendmg to move the movable electrode into engagement with the stationary electrode, a

{ magneto removably mounted on the bracket, strong spring means normally relatively e di ftain'fposition, a hammer, mounted on a to hold the magneto rotor in a cer bracket, a .push finger on the rotor shaft, an

, move, and release said push engine driven actuatorarranged to engage, finger, spring means tending to move the hammer against the movable electrode arm but normally holding the'hammer against the push finger,

and-an abutment carried bythe bracket for normally retaining the hammer at the position previously occupied by the push finger when the magneto is removed whereby the engine driven actuator may operate said hammer similarly to said push rod, said hammer when lying in the position last i mentioned engaging the movable electrode arm and holding'the movable electrode arm out of engagement with the stationary. electrode.

17$ In an ignition apparatus the combination with stationary and movable spark electrodes, an arm on the movable electrode,

spring means tending to hold the movable electrode in engagement with the stationary electrode, a magneto positioned adjacent said movable electrode, spring means tending to hold the magneto rotor in a certain position, a hammer positioned adjacent sald movable electrode arm, a push finger on the rotor shaft adjacent said hammer, and an engine driven actuator arranged ,to engage, move, and release said push finger, spring means tending 'to move the hammer toward the movable electrode but normally holding the hammer against the rotor push finger, and

astationary abutment for retaining the hammer at the position previously occupied e by the push finger when'the magneto is removed from the combination whereby the engine driven actuator may operate said hammer similarly to the push finger, said hammer when lying in the posltipn last mentioned engaging the movable electrode arm and holding the movable elect-rode out of engagement ith the stationary electrode.

. l8. combination with a bracket adapt-' dgftoifbe secured to an engine cylinder, sta- 7 tie-nary and movable electrodes carried by thebracket, a magneto remov'ably supported by the bracket, spring means engaging the magneto rotor and retaining the same in a engage, move,

certain position, a push finger on the rotor shaft, an engine driven actuator adapted to I and release the push finger, a spring mpelled hammer on the bracket normally'controlled by the rotor to effect the operation; of said electrode in timed relation to sald magneto, but adapted to be operated by the engine driven actuator similarly to said push lingeg' when the magneto and spring means assoc'ated with the rotor there-,

of are removed from the combination.

19. In combination with stationary and movable spark electrodes, a magneto positione'd adjacent said electrodes, spring means normally tending to hold the magneto rotor in a certain position, a push finger on the magneto rotor, an engine driven actuator ar- I ranged to engage, move, and release said push finger, and a spring impelled hammer mounted adjgcent said electrodes and nor- 4 mally contro led by the magneto rotor'to effect the operatlonof the spark electrodes in timed relation to the magneto rotor, butmove and release the magneto rotor, and a spring impelled hammer normally controlled by the magneto rotor to effect the operation of said movable electrode in timed relation to the magneto rotor and adapted to be moved and released by the engine driven actuator similarly to 'the rotor when the magneto is removed from the bracket.

'21. In an ignition mechanism stationary and movable electrodes, a magneto adjacent said electrodes, spring means normally tending to hold the magneto rotor in a certain position, an .engine' driven actuator adapted to move and release the magneto rotor, and a spring impelled hammer normally controlled by the magneto rotor to effect the operation of said electrodes in timed relation to the magneto rotor and adapted to be moved and released by the engine driven actuator similarly to said rotor when the magneto is removed fromthe combination.

22. An ignition mechanism comprising a bracket adapted to be secured to an engine cylinder, a movable electrode carried by'the bracket, an arm on the movable electrode, a

1'25 bracket, spring means acting between the magneto I removably mounted upon the magneto framework and rotor normally retaining the latter in a certain posltlon, a

push finger on the rotor, an engine driven actuator arranged cyclically to engage, move, and release said push finger, a hammer 1ournaled on the bracket and movable on an axis co-incident with the-rotor axis, spring means associated with said hammer tending to move the latter toward the movable electrode arm and holding the hammer in engagement with the rotor push finger, sald hammer normally controlled by the retor push finger to operate the movable electrode in timed relation to the rotor, but adapted to be engaged and operated by the engine driven actuator similarly to said push finger when the magneto is removed from the bracket.

23. In combination with abracket adapted to be secured to an engine cylinder, a movable electrode journaled in said bracket, a magneto supported by the bracket, relatively strong spring means normally holding the magneto rotor in a-certain position, means for cyclically moving the rotor against the action of said spring means and for releasing it, a hammer for operating said electrode, and relatively weak spring means tending to cause the hammer to engage said movable electrode, said hammer being controlled by the magnetorotor but operated by its relatively weak spring means to effect the operation of the movable electrode in timed relation to the rotor.

24. In combination with stationary and movable spark electrodes, a magneto dis-.

posed adjacent said electrodes, relatively strong spring means tending to hold the magneto rotor in a certain position, means adapted cyclically to move the rotor against the action of said spring means and release it, a hammer forengaging the movable electrode, arid relatively weak spring means tending lto move the hammer against the movable electrode but holding it in engagement with the rotor, said hammer controlled by the rotor but operated by its associated relatively weak springmeans to effect the separation of the electrodes in timed relation to the-rotor. v

25. In combination with ,an oscillating magneto, stationary and movable spark electrodes, means for cyclically oscillating the magneto rotor, a hammer for operating said movable electrode, and spring means tending to move said hammer toward the movable electrode but holding the hammer against the magneto rotor whereby said hammer is controlled by the magneto rotor Y but operated by its associated spring means to efiect the separation of the electrodes in timed relation to said rotor.

26. In an ignition mechanism comprising stationary and movable spark electrodes, an oscillating magneto, and a spring impelled hammer separate from the magneto con- 27. In combination with a bracket adapt- 4 ed to be secured to an engine cylinder, a movable electrode journaled in the bracket, an oscillating magneto bracket, a hammer mounted on the bracket, a spring acting between the hammer and bracket and holding the hammer against the magneto rotor, said hammer controlled by the magneto rotor but operated by its associated spring means to eflect the operation of the movable electrode in timed relation to said magneto rotor.

28. In combination with a bracket adapted to be secured to an engine cylinder, a movable electrode journaled in the bracket, an oscillating magneto mounted on the bracket, relatively strong spring means normally tending to hold the magneto rotor in a certain position, means for cyclically oscillating and releasing the magento rotor, a projection on the magneto rotor, a hammer on the bracket, and comparatively weak spring means tending to move the hammer toward the movable electrode but holding it against the rotor projection whereby the hammer acts as a follower for the rotor and is actuated by its associated comparatively supported by the weak spring means to operate the movable 1 electrode in timed relation to the magneto rotor.

29, In combination with stationary and movable spark electrodes, an oscillating magneto, an engine driven actuator for engaging, moving and releasing the magneto rotor, a hammer controlled by the magneto rotor to operate themovable electrode in timed relation tothe rotor, and means on the hammer arranged'to be engaged by the actuator, moved and released similarly to the rotor when the magneto is removed from the combination.

30. In combination with a bracket, a movable electrode journaled therein, an oscillating magneto carried by the bracket, an

engine driven actuator for engaging, moving and releasing the magneto rotor, a hammer carried by the bracket controlled by the its magneto rotor to operate the movable elee released.

the rotor, an actuator arranged normally periodically to operate the rotor, said ham-' mer comprising means arranged to be operated by the actuator similarly to the rotor when the magneto is removed.

32. In combination with an oscillating magneto, an actuator therefor, relatively strong spring means normally holding the magneto-rotor in a certain position, a movable spark electrode, a spring impelled electrode hammer controlled by the magneto rotor, and comparatively Weak spring means for operating said hammer in timed rela-' tion to the rotor when the rotor and hammer are moved from their normal positions and 33. An ignition mechanism of the class described comprising in combination with spark electrodes, a magneto, spring means for operating the magneto, an engine driven actuator for moving the magneto rotor in opposition to said sprin means, and electrode operating mechanism controlled by the magneto for operating the electrodes and determining the time of operation thereof, the several parts being so related that when the magneto is removed from the combination said electrode operating'mechanism is 35-. An ignition mechanism of the classdescribed compnsmg 1n combination a magneto having an oscillatory rotor, a movable electrode, a hammer separate from the rotor, spring means for operating said hammer, and an engine driven actuator for engaging, moving, and releasing the rotor, said hammer controlled by the rotor but impelled by its associated spring means to operate the movable electrode in timed relation to the rotor.

In WltIlGSS'WllQIGOf, I hereunto-subscribe my name this 28th day of J uly, A. D1916.

ALBERT G. MCCALEB.

Witnesses: I RoBEn'r F. BRACKE, 'ROBERT M. SEE.

operated and controlledby the engine driven V

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