US1098052A - Magneto-machine. - Google Patents

Description

E. PODLES KK.

MAGNETO MACHINE.

APPLICATION FILED JULY 21, 1911. 1,098,052. Patented May 26, 1914.

4 SHEETSSHEET l.

T Wiinesses Invenicnr a milPElEllE El'L E. PO-DLESAK.

MAGNETO MACHINE. APPLIOATION P ILED JULY 21; 1911.

Patented May 26, 1914.

4 SHEETS-SHEET 2.

Wnassas:

B.P0DLEK.

MAGNETO MACHINE.

APPLICATION FILED JULY 21, 1911. I

Patented May 26, 1914.

4 SHEETSSHEET 3.

Inveninr mil. Pudleak.

.Aficzrneqs Wiinesse 5:

flZ4L 6.

E.P0DLEK.

MAGNETO MACHINE.

APPLICATION IILEf) JULY 21, 1911.

1,098,052. Patented May 26, 1914,

4 SHEETS-SHEET 4.

Wfinesses:

Ill)

upper step 22 and the outer magnets resting plates 24, 24 and are screwed in to abut against the magnets to clamp them liruily in place. Dishcd springs 27, 527 are interposed between the magnets of each pair, near each end, as illustrated. in Fig. 5, in. order to transmit the clamping action.

The m'embers 18, 18 are tri-polar and the middle polar extension of each of them is provided with a generating coil 28, 28. Each of the side plates 14 and 1.5 has a central opening 2-9, these Openings alining upon an axis disposed midway between the pole faces, as will be pointed out presently. In each of the openings 29 a non-magnetic collar 30 is secured, the flange 31 of this clamp being secured to the face of the side plate by means of bolts 32, 32. These bolts, as shown in Fig. 5, extend through the outside polar extensions of the pole pieces in order to as sist in. clamping the laminations together. The collars 30, 30 form bearings for the rotor shaft upon which the rotor 34, having four faces 35, 85, is secured. lhe overall periphery of the rotor is cylindrical and this form corresponds with the cylindrical internal faces of the polar projections, all as illustrated in Fig. 5. The faces of the rotor are approximately the same width as the faces of the middle polar projections and are considerably greater in width than the outside polar faces. Furthermore, the rotor faces are broad enough to span the distance between the middle polar faces and the outside polar faces, but not wide enough. to span the distance between the outside polar faces on one side and those on the other. A thin brass plate 15 is secured across the top of the side plates and a thin brass plate 15 isseeured across the bottom of the side plates in order toinclosc and protect the rotor.

()n the outside, beyond the side plate 15, the rotor shaft has rigidly secured there to a hub 36 which is provided with the oppositely extending arms 37, 37. Each of these arms is provided at its end with a portion 38 turned outwardly at right angles and provided with a spool 39 slipped thereon and retained in place by means of a cotter pin 40. One end of a coiled spring ll is wound about each spool 30 and the other end of each spring is wound about a spool 42 mounted upon a stud 43 extending from the corresponding end plate 24-, a cotter pin 4.4 being provided. to hold this latter spool in lace. The tendency of the rings 4-1, 4]. is to keep the arms 37, 37 in a iorizontal position, as shown in Fig. 2, and when they are in this position the rotor is in the position shown-in full lines in lfig. Upon the opposite end of the rotor shaft oil, which.

is slightly reduced, a. linger 45, preferably of tool. steel, is secured by means of a cross pin 4-0 and a nut l7. T his linger, as will be described later, is adapted to be engaged intermittently by a push rod operating from the engine shaft. This finger is provided with the downward extension .1-8 which is provided with a small stud 49 to which the end of a small connecting rod 50 is pivotally attached, the rod being held in. place by means of a cotter pin 51. This rod extends to the right Fig. 3) where it passes between the tangs of the bifurcated ends 52 of a swinging lever 53 rigidly secured upon a shaft 54-, this shaft being journalcd in the boss 13, as indicated. in Fig.1. A cotter pin- 55 retains the connecting rod between the parts 52, The connecting rod extent s consideral'lly to the right of the lever 53 and at its end'is provided with a shoulder or nut 56 between which and the loose washer 57 thereon the coiled spring 58, encircling it, is disposed. It is clear that the expansive nature of this spring will nor-' arm 61. This arm carries the contact piece 62 which cooperates with the stationary contact piece 63 carried upon a stud (i l: wh ch is eliectively insulated from the boss-13 and the flange 11 by means of the insulating parts 65, 65. The stud 64 extends through the boss 13 and the flange ll. audit is there provided with a nut 67 and with a binding screw 68. It clear that angular movermmt of the arm (ll will result in the malcinglor breaking of a circuit between the points 62 and (33. The arm til. is grounded to the machine and the other contact is i nsuhted therefrol'n. A. suitable insulated conductor (it) COIlIlttCilS the binding post (38 and one of the coils while the two (.fOllt connected together by means of a 70.. The free terminal of the sec: ed to the'machme and cuit for l 'iw tension ig I (ill-learn: 1 is so disposed upon the shaft 54 that when the oscillating lever 53 is in its normal position, that is, when the rotor is in "the position shown in full lines in Fig. 5,

the contact 62 and (33"are separated asin- (heated in rig. 6. The purpose of this arrangement will be pointed out later whenv incense mechanical connections involved, but it is hold at one extreme of its movement by means of a coiled spring 71 which surrounds it between the hub of the lever 53 and the flange 11. /Vhen it is desired to clean the contacts 62 and 63 they may be brought into engagement and the shaft 5% moved back and forth to rub them together.

Referring to- Figs. 7, 8 and 9, it will be seen that a supporting stud 72 is provided and this stud may extend from any suitable part of the engine frame. This stud is provided with a central bore in which a shaft 7 3 is held in any adjusted position by means of a set screw 74. This shaft 7 3 carries an arm 7 5 which, in turn, carries a rotatable stud 7 6. This stud has a forward extension 77, the axis of which is parallel to but eccentric from the axis of the stud itself, for a purpose which will be pointed out presently, and upon this extension a roller 78 is disposed. A push rod 7 9 rides upon the roller 78 and, as broadly indicated in Fig. 7, is

mechanically connected in some way'with the engine shaft. Thus the push rod 79 is guided toalout against the finger 45, as indicated inl ig. 8, and for each reciprocation thereof it moves the linger over to impart a certain amount of oscillation to the rotor. This action is called cocking the magneto. The push rod is provided with a. cam piece 80, secured in. any adjusted position by means of the set screw 81 and this cam piece is arranged to engage the roller at the proper moment to raise the push rod and .to release the finger as so that the rotor may fly back under the influence of the springs 41, 41. As

the rotor returns in this manner the magnetic flux is changed so that current is gencrated in the windings 28, 28 and this causes a spark to pass between the contacts (32 and 63, as will be pointed out more fully later. It will appear that the time at which the fing01'45 is released from the push rod 79 is very important and initial adjustment in this respect is secured by giving the arm 7 5 the proper position and by tightening down the set screw 74 after this position has been attained. It is, however, desirable. fre= quently to change the timing, either to retard or advance the spark, during the operation of the engine, and in order that this may, take place I provide an actuating lever 82 upon the stud 76. In turnimg the stu: by means of this lever the roller 78 is raised or lowered because of the eccentric position of the shaft 77 relativeto the stud 76, and in this way thetime of the release of the finger may be varied. The lever 82 is provided with a. spring 83 which is adapted to snap down into any one of the notches S4,.S'l on the end of the arm so that the arrangement may be held properly in any adjusted position. In temporarily adjusting the lever 82 the tension of this spring is easily overcome so that it may snap into the next notch either one way or the other. Also upon the part 7 7 I mount a bell crank lever 85 held in place by means of a vzsher 86 and a cotter pin 87, and this bell crank lever is provided upon one arm with a roller 88 which iswill be lifted to such an oxient that it can not engage the finger to cock the magneto.

lVhen the speed has decreased the bell crank lever turns in the opposite direction and the push rod may again drop down into operativc relation with the magneto.

As before-stated, the spark contacts 62 and 63 are normally separated from each other. This is important since if for any reason the magneto gives out it is desirable that a battery circuit be connected to provide the spark. If the contacts are normally closed there will be a very large stain upon the batteries and even if storage batteries were used it would result. in the consummation of a larger current than is necessary to produce the spark. Another advantage is gained in this respect and that is the elimination or avoidance of most or all of the reverse current. If these contacts are open during the proper part of the cooking of the magneto,

thcrewvill be no current flowing which will tend to perpetuate itself and to have a counter effect upon the current which is to produce the spark when the rotor is "released.

It will besecn that in the normal position the rotor barely overlaps the middle polar projections and it is a fact that the rotor faces have left the middle polar projections by a considerable distance before the contacts (l2 and (33 come together. Since the middle projections are the only ones which, carry-windings any effect between the other projections would not be noticeable in this respect and there is no appreciable counter effect, if any. In cocking the engine the rotor is brought ()VOf'llltO ap n'oxinmtcly the dotted position a and upon the fly back it probably reaches the position shown by the dotted lines 7). \Vil h an arrangement of this kind the spark secured upon the rising flux, and this is desirable since, as has been pointed out, the relation between the rotor faces and the pole faces is such as to hear a peculiarly advantageous relation to the position and operation of the spark contact terminals. 4 I

ll will be seen that'when the rotor is cocked after a considerable movenu-nt, oer tainly afterthe rotor faces have left the middle polar faces, the contacts will come and will strike it a sharp hammer blow,

thus suddenly Lopening the contacts at the proper point in the current wave which is sln'mltancously "generated in the magneto coils. If, however, it be desired to utilize the decreasing flux for the spark, theinductor is so cocked as to bring two opposite arms of the rotor approximately opposite the wound polar projections before releasing. In this arrangement it is quite essential that the contacts be kept separated until the flux through the wound polar projections has attained a substantially fixed intensity, that is, intensity which is not varying. The operation of the spark contact terminals should be as above described.

The arrangement between the end plates, the side plates, the magnets and the pole pieces is important since a very rigid structure is secured. The parts are few and the connecting points are few. The rotor shaft finds hearing at both ends and in this way the proper relation to the poles is constantly maintained. The fact that the push finger can be made independently of the other parts is important since it can then be made of tool steel and can be readily replaced without interferingrwith any other ofthe mechanisms. This finger must withstand a considerable amount of wear and tear and such an arrangement as I propose is particularly advantageous.

It will be remembered that the side plates which support a number of parts are adjust-ably mounted upon the supporting frame or shelf, due to the enlarged openings through which the cap holes pass. The mechanical arrangement between the push finger and the sparking mechanism is such that great accuracy 1s not required and 1t is not necessary, therefore, to finish the engag- ',ing faces of the shelf and the side plates. Approximate mounting is ample and adjustment is easily secured by shifting the side plates about and then tightening the screws-as desired.

i The parts are easily dismantled. For instance, the cotter pin 55, if withdrawn, will release the entire magneto arrangement from the sparking ar rangement and the other parts'areequally easy of access for the purposes of inspection and repair.

1' No; special arrangement is requiredfor supporting the springs which operate the .7

oscillating rotor. The springs are conveniiantly supported from the side plates which perform Lether neeffli? {Editions and in this way-the nuz'nberof parts is kept ata mini- These plates hold the ,U-shaped magnetsinproper position and in such position that the windings and polar projections do spark comes in, even though temporary adjustment, during the running of the machine, is available.

I claim as new and ters Patent:

.1. In a magneto desire to secure by Letmachine, pole pieces,

horseshoe magnets spanning said pole pieces, side plates between which said pole pieces are firmly clamped, end plates bolted to the ends of said side plates,-a shaft mounted in said side plates, a rotor on said. shaft, an arm on said rotor, and a spring extending from said arm to an extension on the adjacent end plate.

'2. In a. magneto machine, pole pieces, horse-shoe magnets spanning said'pole pieces, side plates between which said pole pieces are firmly clamped, end plates bolted to the ends of said side plates, a shaft mounted in said side plates, a rotor on said shaft, oppo sitely extending arms on said shaft, extensions on said end plates, and a spring ex-i tending between each extension and the ad Jaccnt arm. 3. In a magneto machine, pole p eces,

horse-shoe magnets spanning said pole.

pieces, side plates between which said pole pieces are firmly clamped, end plates bolted to the ends of said side plates, set screws passing through said end plates and abutting against said magnets to hold them firmly in engagement with said pole pieces, a shaft mounted in said side plates, a rotor on said. shaft, an arm on said shaft, and a spring extending from said arm to an extension on the adjacent end plate.

4. Incombination, a pair of tri-polar pole Q111- pieces, windings on 'themiddle portions thereof, a four-faced rotor mounted to 08- cillate between said pole pieces, each of said rotor faces being of a width substantially the same as the width of the middle pole piece and being wide enough to span the'distances between the middle pole pieces and the outside pole pieces but not great enough to span the distances between opposite pole pieces, contact mechanism mechanically connected with said rotor, the contacts of said mechanism being normally separated and the normal position of the rotor being suchthat the rotor =faces only slightly overlap the middle pole pieces carrying the windings, and means for operating the rotor to cock it in a direction receding'from the middie poi-e pieces and simultaneously closing said contacts together.

In combinatlon, pole pieces, a rotor as separated but being brought together by sociated therewith, means for oscillating said rotor, a stationary contact member, an oscillating shaft'carrying a contact member for cooperation with said stationary contact member, an operating lever for said osa rotor mounted upon a shaft, means for cockin said rotor, spring means for suds denly firing-mg said rotor back upon its release, an arm upon the rotor shaft, an oscillating shaft, a lever on said oscillating shaft, a connecting rod extending from said arm through an opening in said lever, ahead on said connecting rod, a spring disposed between said head and one side of said lever, a collar on the connecting rod adapted to engage the other side of said lever, a contact piece carried by said oscillating shaft, and a stationary contact piece associated therewith, said contacts being normally part of the cocking action transmitted through said spring and being suddenly separated by the engagement of said collar with said lever. 1

7. In combination, a pair of pole pieces, a rotor mounted upon a shaft,'means for cocking said rotor, spring means for suddenly bringing said rotor back upon its release, an arm upon the rotor shaft, an oscillating shaft, a lever on said osci'ilating shaft, a connecting rod extending from said arm through the bifurcated end of said lever, a head on said connecting rod, a spring disposed between said head and one side of said lever, a collar on the connecting rod adapted to engage the other side of said lever,v a contact piece carried by said oscillating shaft, and a stationary contact piece associated therewith, said contacts being normally separated but being brought together by part of the cooking action transmitted through said springnnd being suddenly separated by the engagement of said collar with said lever.

In Witness whereof, I hereunto subscribe my name this 18th day of July, 1911.

EMIL PoDLEsAK. WVitnesses:

LEONARD WV. N OVANDER, LEONARD E. Boson.

Images