US606762A - hutin - Google Patents

Description

No. 606,762. Patented July 5, I898. M. HUTIN & m. LEBLANC.

ALTEBNATING CURRENT DYNAMO.

' (Application filed Apr. 19, 1895.) (No Model.)

3 Sheets-Sheet I.

W/TNESSES: mvE/vnms zehvw.

No. 606,762. Patented July 5, I898.

M. HUTIN & M. LEBLAML ALTERNATING CURRENT DYNAMU.

(Application filed Apr. 19, 1895.)

61 W m l W/TNESSES. Z INVENTOHS mm I f a 9 Mace zeiuw.

ATTORNEY.

1y: NORRIS PETER5 CO, Paws-mm, \VASWNGTON, n c.

Patented July 5, I898.

M, HUTIN & M. LEBLANC. ALTERNATING GURRENT-DYNAMO.

(Application filed Apr-Q19, 1896.)

3 Sheets-Sheet 3.

(N0 Model.)

The NORRIS PETERS co, xmcrro nn'lwa.v WASHINGTON. u c.

lilrvrrnn Starr's PATENT @rrrca MAURICE IIUTINJXND MAURICE LEBLANO, OF PARIS, FRANCE, ASSIGNORS TO THE SOCIETE ANONYME POUR LA TRANSMISSION DE LA FORCE PAR LELEGTRIOITE, OF SAME PLACE.

ALTERNATENG=CURRENT DYNAMU.

SPECIFICATION forming part of Letters Patent No. 606,762, dated July 5, 1898.

Application filed April 19,1896. Serial No. 546,407. (No model) Patented in France June 18, 1894, No. 239,283; in Germany June 26,1894, No. 82,217; in Austria July 4,1894,N0.45,201,' in Hungary July 14,1894,N0.1,627; in Belgium November 9,1894,N0. 112,648; in Switzerland November 9, 1894, No. 9,636; in England November 12,1894,N0.21,827,' in Italy November 12, 1894, No. 37,622/448, and in Spain November 12, 1894, No. 21,827.

To all whom it may concern: tion, so that at any time additional generators Be it known that we, MAURICE lIU TIN and may be inserted in the line or may be with- MAURICE LEBLANO, citizens of the Republic drawn from the same even with greater ease of France, and residents of Paris, in the Dethan in the case of ordinary straight-current partment of the Seine, Republic of France, dynamos and without shock to or disturbance have invented certain new and useful 1min the system. provements in Constant-Potential Alternat- In the said application, Serial No. 503,524, ing-OurrentDynamos, (forwhichLetters Patwe have shown and described a system of ent have been obtained in France, No. 239,283, generating alternating currents of high fre- .0 dated June 18, 1894; in Great Britain, No. quency, and in said system we employ agen- 21,827, dated November 12, 1894; in Germany, erator having a rotary field and an armature No. 82,217, dated June 26, 1894; in Austria, closed upon itself rotating with reference to No. 45,201, dated July 4, 1894; in Hungary, said field. This requires at least two alter- No. 1,627, dated July 14, 1894; in Belgium, nating currents or alternating electrical dis- 15 No. 112,648, dated November 9, 1894; in charges properly dephased for the production Switzerland, No. 9,636, dated November 9, of the rotary field, and in such machines there 1894; in Italy, No. 37 ,622 448, dated Novemare produced by the generator directly at ber12, 1894, and in Spain, No. 21,827, dated least two alternating currents equally de- November 12, 1894,) of which the following phased, which currents are or may be united 20 is a specification. upon the line as a monophase alternating Our invention has reference to improvecurrent. 'ments in constant-potential alternating-cur- The fundamental invention upon which the rent dynamos in which an initial field of force present improvement is based may be stated is produced by currents or electrical disin broad terms to be the generation of alter- 2 5 charges derived from an exterior source and nating currents by causing electrical oscillawhich field of force is reinforced by the in- Lions of any desired frequency and reinforcductive action thereon of a rotary armature ing the same to any desired volume. The the circuit or circuits of which move in inelectrical oscillations are preferably produced ductive proximity and with reference to the by condensers and constitute the initial cur- 0 poles of said field of force. rents upon the line and produce an initial The invention is an improvement upon and magnetic field of force, both of which are exan amplification of the system of generating ceedingly faint. This initial field of force alternating currents of high frequency set and these initial alternating currents are reforth in our application, Serial No. 503,524, inforced by the inductive action of an arma- 35 filed March 13, 1894. It embracesanew mode ture having circuits closed upon themselves of generating constant-potential monophase and which is rotated within the initial field or polyphase alternating currents and also a of force with a speed that exceeds a certain general system of distribution of alternating minimum speed. currents in which any number of generators The invention which we have thus broadly 40 may be coupled for quantity without requiroutlined and which forms the subject-mating the several generators to run in synchroter of our aforesaid application, Serial No. nism. Thereby it becomes practicable to con- 503,524, is fully explained and properly nect to the system of distribution any numclaimed in the said application. ber of generators at a moments notice with- 111 our present improved system we dis- 45 out the observance of any particular precaupense with the production of a rotary field o see,

that is, a field that rotates even when the armature is at rest-and we produce by the generator directly monopha-se currents, and if polyphase currents are required we use a number of ourimproved machines, each gencrating a monophase current, but each havlllg its phase displaced with reference to the other.

Our machines are so constituted that their electromotive force is independent or practically independent of the speed of rotation of the rotary member as soon as the same has exceeded a certain critical speed. Any further acceleration of the speed of the machine only increases the volume of the current generated, so that if a number of machines of this kind are driven with speeds exceeding that critical speed they may be compared to a number of electrolytic cells of the same type, but havingelectrodes of different sizes. Such electrolytic cells, as is well known, may be connected in quantity to a system of dist ribution without short-circniting each other, and any number of them may at any time be inserted into or withdrawn from the system without in any way or manner allocting the systen'i, except to increase or diminish the current .in the same. ()ur generators behave exactly in this manner, always supposing that theyare driven beyond the criticalspeed.

All this will more fully appear from the following detail description with reference to the accompanying; drawings, in which our system is illustrated as follows:

Figure 1 is a side view of the constantpotential alternatirig-current dynamo, partly in section. Fig. 2 is a vertical section at right angles to the shaft, through a portion of the held-magnets and the armature, upon an enlarged scale. l -ig. 3 illustrates a section on the line a; n; of Fig. 53. Fig. l is a diagram illustrating the manner of coupling a number of our dynamos for quantity with a system of distrilnitimi. Fig. 5 is a diagram illustrating the production of two dephased currents in accordance with our invention.

Like letters and numerals of reference indicate like parts throughout the drawings.

The constant-potcn tial monophase altcrnating-current generator has the general form represented in Fig. 1, the details of which are shown in Figs. 2 and 23. Referring to these figures of the drawings, it will be seen that the generator is composed of a stationary member 1 and a rotary member 2. .lly reason of the peculiar mode of action of our machine the conventional nomenclature usually applied to these two parts is perhaps not quite applicable, but in order to facilitate the description we shall hereinafter speak of the stationary member as the hold magnet or magnets and of its circuit or circuits as the lield circuit or circuits, and similarly we shall call the rotary member the armature and its circuits the armature circuits, without, however, thereby implying the notion that the currents for the system of distrilmtion are derived from the armature. On, the contrary, these currents are deri ved from the field circuit or circuits, as will presently appear.

The stationary member is an annular cast ing 3, to the inner face of which is titted and properly secured a ring -l-, composed of laminae of sheet-iron insuh'rted from each other by any of the well-known means, and in this ring; are embedded the ends of lamina ted -i ron cores 5, having polar GXlLOlIF-jlOHS ti. llhesc cores extend radially from the inner face oi. the ring 1-, and each of these cores has upon it a bobbin 7 of insulating 'imi terial, with a coil 8 of insulated wire wound. thereon. In the drawings the cores and llt bbins a re shtnrn rectai'lgular in shape; but this is by no means essential, since all that is required is that a series of electromagnets be arranged closely together, projecting, radially from the laminated ring; -l, which constitutes the common yoke to all these electrmnagnets. Another condition is that there be an even. number of electron'iagnets. 'lhese electromagnets are wound alternately in opposite directions, and they are all connected in. one series, so that an electric current-orimpuh-re WISE-dill}; through them will give to the successive polar extensions opposite polarities. The faces of them": polar extensions are slightly curved, so as to define the surface of a cylinder concentric with the ring l-.

The rotary member is in the shape of a spoked wheel fl, mounted on a shaft til, supported in bearings lit. tin the periphery of this wheel there is a lamin.-1tcd ring [2, of sheet-iron, securely lixcd to the rim. of the wheel. and having a series of s ots 13, cut end ing parallel to the shaft and opening into the outer face of the said ring; 12. 'lhcso o enlugs 11- are much narrower than. the slots proper, which latter are shown in the drawings somewhat approaching the form of a rectangle with the corners rounded off; but this form not essential and has only been so leeted because it admits of a greatnumber of slots of eomisiderable size with a narrow web 15 between them. ln these slots are ini-rertml closely-fitting copper rods 16, each terminating, at each end in a pin 17. To each side of the ring 12 is applied a copper ring i 8, providcd with perforations corresponding to the pi s 1.7 and .Iittin r over the same. The ends of these pins are upset, whereby the two copper rings are riveted to the copper rods I t3, so as to make good electrical connection with the same. Instead of riveting these eo ipcr rods to the copper rings they may be screwed to the same or other-wi secured, the only eoi'idition being, that a great, number of circuits of low resistance be formed and as much possible embedded in the laminated. ring 2. The number of copper rods to slmuld be as great possible, but never less than two rods for each polar or tension of the tieldanaglit) nets. The greater the number of these rods the better it is.

In Figs. 4, 5, and 6 a number of generators constructed and operated in accordance with our invention are represented in a conventional manner, the field-magnets being shown simply as ring-cores with the field-coils wound directly thereon instead of being wound upon cores projecting radially therefrom. This is done for the sake of simplicity of illustration only.

Referring now more particularly to the generator 1 2, (shown in Fig. 4,) it will be seen that the series winding of the field-magnets terminates at 19 and 20, from which points the two line- wires 21 and 22 extend to the system of distribution, by which any suitable translating devices may be fed. From these same terminals 19 20 extend the conductors 23 24, which are connected with the terminals of a condenser 25, as indicated.

Ve have discovered that if in a machine of this kind an alternating current no matter Vi from the conductors 23 2% by the binding-posts 19 20 through the coils of the field-magnets, and if the armature is rotated by external power, as indicated by pulley 10 and belt 10,

with a speed exceeding the quantity (the how faint and of the frequency is passed number of poles of the machine being 2 n) then, first, the field of the machine will be rapidly reinforced and the machine will furnish to the line an alternating current of the frequency second, after a very short time a constant difference of potential will be established between the binding-posts, and, third, this effective difference of potential will be practically independent of the output in amperes. This latter phenomenon we explain by the fact that to every increase of current traversing the field circuit corresponds in these machines a proportional increase of currents generated in the armaturecircuits. These latter currents developing a magnetizing force opposed to that produced by the currents in the field-circuit, it is clear that the total flux developed in the machine will not vary with the output of its field-circuit. The phenomenon, therefore, of building up the field terminates in these machines when the speed of the armature exceeds the critical speed and any further increase a of that speed only adds to the volume of the currents generated.

The initial currentfor the initial excitation trical impulses of the desired frequency In the case of a condenser, as in the present instance,its capacity must be such that, joined to the machine, its alternating discharges will have the frequency We have found that this capacity F is given by the formula:

wherein T represents the duration of the period of the discharges to be obtained expressed in seconds, and L the coefficient of self-induction of the field expressed in henrys. Circuits the capacity and self-induction of which are proportioned in this manner for a definite frequency are known in the art as resonant circuits.

It will now be evident that any number of such machines running at any desired and I: x10 microfarads,

variable speeds above the critical speed may be connected in multiple arc with or disconnected from the line without any precaution and without any skilful manipulation or observance, precisely the same as if these machines were each an electrolytic cell of the same type, but each having a different internal resistance from the others. Nor is the frequency'of the current generated affected in any way or manner by the coupling of several of these machines for quantity, because when the machines are thus connected the existing condensers also become connected for quantity and then form in effect only a single condenser having a capacity equal to the sum of the capacities of the coupled c011- densers and at the same time the exterior circuit into which this battery of condensers nowdischargesthat is to say, the circuits of the field-magnets of the different machines connected in multiple archas now a coefficient of self-induction that is equal to the coefficient of self-induction of one of these fieldcircuits divided by the number of field-circuits connected in multiple are. Now, since, as we have seen above,

' G 4 11 L 10 there is also 2 yn/ T- L.

This being the case, it is evident that, if any number of these machines-say, for instance, it machinesbe coupled for quantity the coe-fficient of self-induction would be divided by 70, while the static capacity would be multiplied by 70, so that the period of the current generated will remain unchanged and the combined exciting-circuits form a resonant system of the original frequency. Such arrangement of several machines connected for quantity with a'line of distribution is represented by the diagram Fig. 4:, in which three such machines are shown thus connected. The field-coils of the machines are designated, respectively, by Z Z Z, the condensers by 25 25 25, respectively, and the conductors conscares necting the condensers with the terminals of the field-coils by 23 24 23 24 23 2%, respectively. The main line is marked 21 22 and the conductors by which the two auxiliary machines are or may be connected to the main line are marked 21 22 and 21" 22, respectively.

It will now be seen that if the machine with the field-coils Zwere feeding the line 21 22, and if a greater number of translating devices were required to be loaded onto the line than could be supplied with current by this one machine, all that is necessary is to close the circuit of any one or both of the auxiliary machines by the switches 20 after their arma' tures have attained a speed exceeding The electromotive force of each of these machines being the same, so long as the armatures exceed the critical speed there can be no short-circuiting of any one machine or machines by any other machine or machines. \Vhat has here been said of three machines is equally true of any other number of machines.

"We have so far considered the charging of a line with monophase currents either byone or by several generators; but our method of generation is also applicable to the production of polyphase currents by using as many machines of the kind described as there are to be dephascd currents. It is evident that the currents or discharges from the exciters must be dephased by the same fraction of a period as the currents to be obtained from the generators, since the period of the current generated is the same as the period of the excitin g-currents,and the phase of the current generated depends upon the phase of the excitercurrents. If therefore 7; currents dephased with reference to each other by; of a period with reference to each other by% of a period.

This can be done in a variety of ways, some of which we have indicated in the drawings.

In Fig. 5 an arrangement for the production of two currents dephased by one-quarter of a period is diagrammatically illustrated. The field-coils of the two machines are designated by Z and Z, and from the terminals of the same the lines 21 22 and 21 22 proceed, either for joinder to the same translating device or devices or for independent use. The exciting organ in this case is represented as a condenser 25 and a reaction-coil 27, connected in series. The free end of the reaction-coil is carried to a point 28, from which wires 29 and lead to one of the terminals of each of the condensers 25 25, respectively, the other terminals of which are connected by conductors 31 32 to the points from which the outgoing lines 21 21 proceed from the respective terminals of the field-coils Z Z. The free terminal of the condenser 25 is connected by the common returnconductors 00 and to the points where the incoming lines join the iield-coilsl and t, respectively. If the currents desired are intended to have the frequency ,1 the coefficient of self-induction A of the coil 27 and the ca pacity .l of the condenser 25 must be so chosen as to satisfy the relation These analytical deductions we have verified in practice, which demonstrated not only that under the conditions stated do the two dynamos automatically build up their Iield of force jointly, but also that the currents furnislmd by the same are depha'sed with referenee to each other by one-quarter of a period.

\Ve have now shown how two machines may be excited jointly for the production of twophase currents; but it is evident that any greater number of machines may be joined in accordance with the same 'n'inciples for the production of multiphase currents. In, each case it is practicable and indeed preferable to start with a monophase exeiting-current and to decompose the same into a two, three, or poly phase current, and in each case it is practicable and indeed Pi'OfGlttlJlO to use as the means for the production of the monophase exciting currents or discharges a condenser and a reaction-coil, constituting an electric resonator, and then to dephase the currents 0r discharges. lVhile this is the preferable mode of obtaining the dephased exciting-currents, it is not by any means in dispensable, since an ordinary small alternating-current machine with the requisite number of shifted genera ting-circuits maybe employed, as will be readily understood by by those skilled in the art.

Any group of dynamos connected and operated as described for the production of pol yphase currents may be treated as a unitthat is, as a single polyphase machine-a1nl if an increase of the current in the distributing system is required one or more additional. polyphase machines may be added in quantity to the system, as is quite evident.

While we have particularly emphasized the use of our machines in nmltiple-are connection with a system of distribution, it is quite clear that they may also be used coupled for tension, in which case the initial exciters must also be connected in series. The exciters thus connected then constitute, in effect, one exciter common to all machines.

In our machines the field-magnets, or what we here call field-magnets, are shown as fixed. Consequently their pole-pieces are also fixed, and the resulting magnetic fluxes have definite locations with reference to the pole-pieces. Now we desire it to be understood that when we speak of fixed poles or a fixed magnetic field or fields we refer solely to the structure of the machine and to the f phenomenon directly observable in the same when the armature is at rest, but that we do not thereby desire to convey the idea that the current derived from the windings of the field-magnets is due to magnetic fluxes which have a fixed location withreference to the field-magnets. On the contrary, we understand that by the rotation of the armature the fixed alternating magnetic fluxes are decomposed into two rotary magnetic fluxes, one of which is consumed in the generation of currents in the armature and the other acts upon the field-winding to reinforce the initial current in the same. Vhile this is our understanding of the modus opercmcli of our reinforcing-machine, it is unnecessary to enlarge here upon this theory, and in the appended claims we shall speak of a magnetic field or fields and of magnetic poles as if they were fixed with reference to the field magnet or magnets, thereby referring only to the mechanical structure of the machine and to the phenomenon directly observable therein when the armature is at rest, as above explained. Similarly, when we speak of an oscillating magnetic field or an alternating magnetic field we thereby only mean to define the nature of the magnetic field as the same is produced directlyby single-phase alternating currents and when the armature is at rest.

Having now fully described our invention, we claim and desire to secure by Letters Patent- 1. The method of generating alternating electric currents, which consists in producing periodically alternating magnetic poles, fixed with reference to a field-magnet, reinforcing the same by the movement of a closed circuit or circuits with reference and in inductive relation thereto, and inducing by the reinforced field or fields alternating currents, in a circuit or circuits traversing the said reinforced fields, substantially as described.

2. The method of generating and utilizing alternating electric currents, which consists in producing by single-phase initial alternating electric currents or discharges an initial alternating magnetic field or fields, reinforcing the said field or fields and initial currents or discharges by the movement within said field or fields of a closed electric circuit or circuits, and conveying the reinforced currents to a line of distribution, substantially as described.

8. The method of generating alternating electric currents, by rotating an armature circuit or circuits, closed upon themselves, within inductive proximity to a circuit traversing an alternating magnetic field or fields, with a speed exceeding the frequency of alternations of the field, divided by half the number of poles of the same, substantially as described.

4. The method of generating periodic alter nating currents, which consists in producing, in suitable field-magnets, alternating mag netic poles fixed with reference to said magnets, reinforcing said poles by moving a closed circuit or circuits with reference and in inductive relation thereto, with a speed exceeding the frequency of the alternations divided by half the number of poles, and inducing, by the reinforced poles, alternating currents in a circuit or circuits in the magnetic field of said poles, substantially as described. 5. The method of generating alternating electric currents, which consists in producing, by initial alternating electric currents or discharges, an initial alternatingmagnetic field or fields fixed with reference to a field magnet or magnets, reinforcing the said field or fields and initial currents or discharges, by moving within said field or fields a closed electric circuit or circuits with a speed exceeding the frequency of the initial alternating currents divided by half the number of field-poles, and conveying the reinforced currents to a line of distribution, substantially as described.

6. The method of generating and distributing two or more alternating currents of like periods and tension, which consists in simultaneously charging the field-coils of two or more independent generators from the same initial source of alternating currents or discharges, reinforcing the field currents by rotating, independently of each other, within the field of each generator, a closed circuit or circuits, with any speed exceeding the frequency of the exciting currents or discharges divided by half the number of poles of the field, and conveying the reinforced currents each directly to the same system of electrical distribution, substantially as described.

7. The method of generating and distributing two or more alternating currents of the same period and tension, but dephased with reference to each other, which consists in simultaneously charging the field-coils of two or more independent generators from the same initial source of dephased alternating currents or discharges, reinforcing the fieldcurrents by rotating, independently of each other, within the field of each generator, a closed circuit or circuits, with any speed exceeding the frequency of the dephased exciting currents or discharges divided by half the number of poles of the field, and conveying the reinforced currents to a multiphase system. of distribution, substantially as described.

8. An alternatingcurrent dyna-n'lo-electric generator, consisting of a field-magnet having initial alternating poles .Iixed with reference to the field-magnet and excited by alternatingcurrcnts or discharges from an exterior source, an armature having one or more circuits, each closed upon itself, and adapted to be rotated by external power in inductive proximity to the poles, and a line or lines of conductors receiving currents from the fieldcircuit, si'ibstantially as described.

9. An alternating-current d ynamo-electric generator, consisting of a number ol lieldmagnetshaving alternatingoppositelyavoitind coils connected with a distributing system, a source of alternating exciting-currents or electrical discharges con nected with the lieldcoils in abranch derived from the line, charging the coils with single-phase currents, and an armature having one or more circuits, each closed upon itself, adapted to be rotated by external power in inductive proximity to the held-poles, substantially as described.

10. An alternatingcurrentdynamo-electric generator, consisting of a number of fieldelectromagnets, the polar faces of which are circularly arranged, so as to define the curved surface ol. a cylinder, the coils of the alternate magnets being oppositely wound and all connected in a single series with a line of distribution, a source of alternating excitingcurrents or electrical discharges also connected with the coils, in a branch derived from the line, and an armature having circuits, each closed upon itself, adapted to be rotated by external power in inductive proximity to the pole-faces, substantiallyas described.

11. An alternating-current dynamoelectric generator, consisting of a field-magnet havin g eireularly-arran ged pole-pieces, each with a coil wound in opposition to the next adjacent coils and all excited by singlephase alternating currents or electrical discharges from. an exterior source, a rotatable armature composed of two parallel metal rings connected by metal bolts embedded in laminated iron, and adapted to be rotated by external power, and a distributing line or lines of conductors connected with the field-circuit in multiple arc with the exciting-circuit, substantially as described.

. 2. An alternatii'ig-eurrcntdynamo-electric generator, consisting of a fieldanagnet havingcireularly-arranged pole-pieces, each with a coil wound in opposition to the next adjacent coils and all excited by alternating currents or electrical discharges tl'irough alternately oppositely wound coils, an armature composed of a ring of laminated iron having a copper annulus on. each side and. copper rods traversing the iron ring and connecting the copper rings, and a distributing line or lines of conductors connected with the field.-

circuits in multiple are with the exeiting-cir cuit, substantially as describml.

13. A system ofgcneration and distrilnuirnl of alternating electric currents, composed oi? a number of dynalilo-electric genenttors, earl: consisting of a lield magnet or magnets and an armature having cirmiits closed upon themselves; means for con nerting the field-circuits of the different dynamos in multi le-areeon nection with a line or lines of distrilnition, a single ultimate source of faint initial alter-- nating exciting currents or discharges for the :lield-circuits in a shunt or shunts around the line or lines of distribution, and means l'or rotating the Ztl'll'lftblliO, by external tumor, with a speed exceeding the treipumcy ot the exciting currents or discharges divided by half the number of poles of the licld, .ziillll-iliildh tially as described.

l-l. A system of generation and distrib n tion of multiphase alteri'lating currents, com per d of a series of dynamos each having its 1 circuit excited by a curren t properly depha. Ell with reference to the exciting-eurrent ol' the other or others, and each having an armature with circuits closed upon themselves, rotaia ble by external power with a speed exceeding the frequency oi. the cxciti ng currents or d iseharges divided by half the number ol. poles of the lield, an d. lines of distribution proecer't ing from the field-windings, substantially as described.

15. lhe method of generating alternating electric currents, by rotating an armature cir-- cuit or circuits closed upon themselves, within inductive proximity to a resonant circuit traversing an alternating magnetic held or fields, with a speed exceeding the freipiency of electrical oscillations in the rosoln'tnt circuit, divided by half the number cl" poles ol' the field, substantially as described.

16. An alternating-current generator com posed of a series of lieldonagnets having alternately oppositely we und coils, all incl uded in and forming part of a resonant exciting-cl rcuit adjusted to a delinite frequency of cine trical oscillation, an armature liavin cui ts closed. upon themselves within ind ucti e proximity to the field-poles, means for rotating the armature with relj'eren cc to the licld-qnilms with a speed exceeding the lrequerujay ol. the excitjug-current divided by one-half the numben: of poles of the field, and a line ol. rftistrilnrtion connected with the lield-winding, substantially as descrilgied.

1.7. An alternatingcurrent dynamo electric generator eonsisiing of a field-magnet having initial alternating poles, fixed with reference to the field-magnet and excited by the electrical oscillations in a resonant circult, an armature having one or more eircu its, each closed upon itselt, and adapted to be to tated by external power in inductive proximity to the poles, and a line or lines elf con ductors receiving eurren ts from the lield-cie cuit, substantially described.

18. A system of electrical generation and Ills distribution which consists in a. number of alternating-current generators, each having a magnetic field formed by alternating magnetic poles fixed with reference to its fieldmagnet and each excited by a resonant circuit; an armature with circuits closed upon themselves for each generator; means for rotating each armature With a speed exceeding the frequency of the exciting-currents divided by one-half the number of poles of the machine, a working circuit proceeding from each field-circuit, means for couplin g the resonant circuits in multiple, and means for coupling the working circuits in in ultiple, substantially as described.

19. As a means of exciting a number of alternating-current generators independently and jointly with alternating currents or discharges of the same frequency, the combination of electrical resonant circuits, one for MAURICE HUTIN. MAURICE LEBLANC.

Witnesses:

CLYDE SHROPSHIRE, BovY.

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