US939910A - Magneto-generator. - Google Patents

Description

E. H.' HASSLER. MAGNET@ GENERATOR.

. 90a. 939,91. PatentedvNov. 9. 1909,

. z SHEETS SHEET 1. l

R. H. H ASSLBR. MAGNETO GENERATOR. APPLIOATION FILED MAR. 23, 190s.

939,910, Patented Nov, 9. 1909.

2 SHBETSTSHEBT jle 'generators and h ROBERT H. HASSLER, 0F INDIANAPOLIS, VIlil'Ifftl'i.

MAGNETO-GENERA'EGR.

eeaeio, Y

Specification of Letters Patent.

-l?)attend;eci Nona 9, i909,

Application filed March 23, 1908. Serial No. @22,840.

To all whom firmafy concern: f Beit known that I, ROBERT H. HAssLER, a citizen of the United States, residing. at Indianapolis, in the county of Marlon and State of Indiana, have invented certain new and useful Improvements in Magneto-Generators, of which the following is aspecilication, reference being companyingdra'wing.

My invention `elates to magneto electric las vparticular reference to an alternating current generator to be used as an accessoryto explosive engines to furnish the/current for the lspark to ignite the gaseous lor` liquid fuel, and whichshall be especially applicable to such engines having a wide range of speed, as for driving automobiles and motor-boats. f

in producing sparlrs to explode charges of fuel in explosive engines it is necessary that the alternations of current have a certain frequency with relation to thespeedof the engine, it being desirable that several'alternations occur while the timingcommutator or distributer is making contact in order that an efli'cient spark be obtainedY at different engine speeds. For this reason approximately sixteen alternations of current should occur for each revolution of the engine, and in some cases a higher number of sparks is desirable; to produce thisfrequency mag-A netos as heretofore constructed have been driven many times faster than the engine7 as a two-pole alternator or magneto would,-be required to revolveorrun at veight times'the speed" of the 4engine and a four-pole altert nator at four times the engine speed. Such high speeds of the magneto are objectionable for many reasons; for example, they necessitate impractical or undesirable methods of driving the magneto, cause rapid deterioration of the magneto `bearings, and require too much care and attention to insure proper lubrication, especially during long periods of use. While the magneto speed may be reduced by employing an increased number of magnets, such arrangement with the usual vforms of construction heretofore employed would necessitate a magneto of large and clumsy proportions; the nature of the work demands an alternator which may be readily installed in the limited space available about an automobile or boat engine, and hence it must be compact and vof small' proportions'- Y i' The 'primary object of my inventioiiis-to had therein to the acprovide a novel and improved alternator of compact form capable of producing a high Speedi ln alternators of all speeds, either high or vnumber of alternations at a low armature low, it is desirable that Vthe journals and bearings be of such construction as to require Vinfreqi-ient attention as to lubrication, and 1that means be provided for lubrication during extended periods of use.

A. second obj ect of niy invention is to provide a magneto or alternator having efficient lubricating facilities, and specifically one which may be packed with grease or other lubricating .marial so that it is self-co itained in thisisespect.

- The partictilar .and special object of the [invention is to provide an alternator vor magneto inwhich all the above advantages will be obtained', namely, a vlarge number of p oles to produce a high number of alternations at low armature speed, compact formation and arrangement of all the parts, and self-contained lubricating facilities.

Vention consists in the organizations and arrangement of parts hereinafter described and then pointed.- out in the appended claims.

ln the accompanying drawings," which illustrate the preferred embodiment of my invention, Figure l is a diagrammatic viewy showing the generator in circuit with a comniutator and an induction coil provided with .a vibrator, a spark-plug being included in the secondary circuit of the coil; Fig. 2 is an end view of my generator with the cap removed; Fig. 1,3. is a longitudinal sectional View of the generator on the line 3--3 of Fig. 41; and lig. l is a cross-sectional view of the same on the line ei-li of Fig. 3.

ln `the drawings reference numeral 5 'designates a. cylindrical casing of vbrass or other suitable non-magnetic metal, having a head 6 at one end and an annular magnetic yoke 7 at its other end. The yoke and he'ad are provided with central bearings 8 which support an elongated shaft-journal 9 extending centrally and longitudinally of the chamber formed by thecasing and its endclosures and in which a driving shaft l0 is journaled adapted to be rotated by a suitable pulley ll from any source of power.,

A plurality of permanent magnets 12 o any suitable sire .and shape are disposed 80 .With these several objects in view, the inico.

along the outside ofthe casing :and longiv tudinally thereof, and in the present en1- bodiment olimy invention l. have shown eight such magnets which are substantially square in cross-section and adapted to seat. in channels 18 in the casing. rThe yoke is seeured to or-e ol" the'ends of the magnets by screws lfland the magnets are held seated in the channels by non-magnetic retainers 15, or other suitable means, which are py sitioned between the magnets and are secured to the casing by the screws 16. The head of each retainer is provided with two flanges 1T disposed one on each side thereotand transversely oit the magnets upon which they bear. The other ends of the magnets pass through suitable openings or slots in a ring 1S formed by an annular projection on the head t3, beyond which their pole-segments 'l 9 project to Lt'orin an interpolar space, The drivingeshalit carries an armature which may be olf any suitable form but in the present instance con'iprises a steel disk or core 20 having eight radially projecting poles 21 provided with convear fac ",orresponding with the concave faces of Lne poles ot' the magnets, l" is ot' course understood that the coils which surround each of the arma,- ture poles are connected in' series, and one of the terminals of the windings as 23 is connected to the armature core and thence grounded through the base and trame of the machine, while the other terminal. 24 is elecrgei llywconnected to a rotating brush or conril-TQS mounted in the armature. For this purpose the core of the armature is provi/led in its outer sideI with a metallic nip or pocket which projects somewhat beyond the face of the core to electrically connect with thc terminal 2l. and receives the brush or contact 257 which rests upon a suitable spring 2T locatediin the bottom of cup; the brush. substantially lls the provide electrical continuity "n, and the cup is seated in an insuten lulde" :2S by. which it is carried and i i vi in the armature.

, he a 'mature core and the adjacent ends are inelosed by a cap 29 ot' other non-magnetic metal which is secured to the annular flange 18 by lag screw 30. The cap is centrally reamed out binding post is suitably attached and against which the brush 25 bears. The plate 231 is secured in suitable manner being insulated from the cap; in the form shown the plate 31 is connected to an outer plate adapted to overlie the opening in the cap by Screws passing through' an intermediate annular insulating washer 35 having an annular flange overlying the inner lace of the cap te insulate the plate 31 therefrom, a suitable insulating washer 3G also being interposed between the cap and plate 33. By this construction the parts are rheld in ixed retdtwndiu l lation and the current is carried to the binding post 3Q.

The binding post 32 is in circuit with the primary winding of an induction coil 3T having a magnetic Vibrator the circuit being ycompleted through a commutator 3.) and switch et() back through the base and trame ot' the magnets to the otherterminal 23 ot' the armature windings. lvrhen the armature is rotated sinteen alternations are obtained for each revolution ot' the engine by which the pulley 11 is drivem and this alternating current is sent through the primary winding olf the induction coil; the high tension current induced in the secondary winding ot' the coil is delivered to the spark plug all in the circuit of the secondary winding to produce a jump-spark in the engine cylinder. lf the armature driven at twice the engine speed? eral alternatioiis of cuiernt will be obtaii'ied while the commutator is making contact, thus producing an effective spark in the cylinder.

The support for the magnets is preferably made as a self-containing lubricator tor the armature shaft by packing the chamber,

formed in 'the interior of the casing with greasev or waste and oil. For this purpose the chamber may be packed before the yoke 7 is secured in place upon its end, or 4it may be provided with a longitudinal slot elfi through which waste 0r other material is passed to pack the lubricating reservoir coinprising substantially the entire interior ot casing, the slot being closed by a metal ,strip suitably secured to the casing and which turn may be provided with a port through which oil is admitted te the well and which may be closed by a screw-ca p ll. 'lfhe bearing 9 provided with a suitable openiiig #i5 through which the oil or grease adapted to be ted from the well to lubricate the shaft. ln order to provide tor conveniently supplying the chamber with oil, l may form an oil inlet #lo in the head (l and its ring 18, the screw-cap f 7 forming the closure of the inlet being accessible trom the outside oli the inclosing casing 4 8 which surrounds the parts and is connected to a supporting base or bracket 49. The head l and llange E 18 also may have a drain passage 50 leading to receive a comluctiiig plate 3l to which the lrom an annular drip-cup on the head and surrounding flange 52 on the armatinc core, whereby the armature windings are protected 'from oil or grease leaking through the bearing. The shaft 1G is held against longitudinaldisplacement by any suitable lmeans, as the wheel 11 held by its nut 53 and the annular flange r52 o't the arrnatincI core keyed to the shaft and abutting against the projecting end of the shaft-journal l) which in turn is flanged as at 511: to' bear against the outer face of the associated head 6.

In the form shown the casing 5 performs 50 for lubricating material, aplurality of mag thev double function of supporting the mag-I -several alternations of current willoccur while the commutator is making contact in order that an eiiicient spark may be obtained at diHerent engine speeds.

- vVarious changes may be made in the details of the several features of the device without departing from my invention; for example, while I have shown the magnets in the form of bar magnets .they mayl be of other forms, such as horseshoe magnets,and while the `present exemplification discloses my invention with relation to a structure in which its various features are practically embodied, I do not limit myself to any specific forms.

Having described my invention claim as.,

new. and desire to secure by Letters Patent l. In a device of the classdescribed, a cylindrical support providing a lubricating reservoir, a series of magnets `4arranged about the axis of the support and projecting at one end to form a multipolar magnetic field, a

shaft in the reservoir and carrying an armature in the said field, and means whereby the shaft may be revolved. A

2. In a magneto-'electric generator, a casing of non-magnetic material, a driving-shaft in the casing, a lubricating reservoir within the casing and communicating with the drivingshaft, a plurality of magnets mounted on the casing, and an armature secured to' the drivv ing-shaft 'and adapted to be'rotatedthereby.

3. In a device of the class described, a casing of non-magnetic material forming a lubricating reservoir, a bearing in the reser- Voir and having a port opening into the reservoir, a driving-shaft j ournaled in the bearing, a plurality of magnets on the casing,

and an armature on the driving-shaft and adapted to be rotated thereby.

4. In an alternating current generator for ignition purposes, a cylindricalj'-casing of non-magnetic material .formlng'f a reservoir nets arranged lengthwise-'pn the'outside fof the casing, a shaft extending through the reservoir, an armature 'on one end of the shaft, and means whereby the shaft may be driven. A

5. In an alternating current generator for ignition purposes, a cylindrical non-magneticl casing forming a reservoir for lubricating material, a plurality of magnetsv arranged lengthwise on the outside of the casing, projecting portions of the magnets forming pole pieces at one end, a shaft extending through the casing, anxarmature on the shaft, and means to introduce lubricant into the reservoir without disassembling the armature and a :1n-alternating current generator for ignition' purposes, a cylindrical casing of .non-magnetic material, a plurality of magnets arranged lengthwise on the outside of the casingand projecting at one end to form van interpolar space, a shaft having a journal a multipolar magnetic field, an annular mag-r netic body at the other end forming a oke for the magnets and closing the end'of the cylindrical cup Ato form a space for journal and lubricating. materials, and an armature revolubly mounted in the field.

8. In a magneto-electric generator, a cylindrical support, a pluralityof magnets mounted on the support, a shaft onythe su port, an armature adapted to be rotated y the shaft, a cap inclosing the armature and magnet poles, a'brush carried by the armature and forming a terminal of the armature-winding, a binding-post on the cap, and

means to secure electrical continuity between the post and brush.

9. In a'device of the class described, a cylindrical support, a driving-shaft journaled in the support, a plurality of magnets mounted on the support about the shaft, an arma- -ture adapted to be rotated by the shaft, a

spring-pressed brush carried'by -the armature in electrical extension of the armatures winding, a cap inclosing the armature and magnet poles, a contact-plate insulatingly mounted-'on the cap and engaged by the brush, and aterminal on the plate.

In testimony whereof I'afix'my signature in presence of two witnesses.

ROBERT H. H'AssLER, Witnesses:

. J. MoRoBEn'rs,

GEORGE R. HARBAUGH.

Images