USRE12241E - Controller for electric motors - Google Patents

Description

RBISSUED JULY 19,1904.

B BHEETSSHEET 1.

32: MS cm WILL W B. POTTER. R FOR ELECTRIC MOTORS. APl-LIQATIOH FILED mm. 21

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GONTROLLE I P\ BEST AV NLABLE GO REISSUED JULY 19, 1904-.

w. B.' POTTER. CONTROLLER FOR ELECTRIC MOTORS.

-APPLIOATION FILED JUNE 21, 1904. I

6 SHEETS-SHEET B.

BEST-AVAILABLE COPY];

REISSUED JULY 19, 1904;

w. B. POTTER. CONTROLLER FOR ELECTRIC. MOTORS.

APPLIGATlON FILED JUNE 21, 1 904.-

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BEST AVAILABLE co'Px No. 12,241. REIS'SUED JULY 19, 1904.

W. B. POTTER. CONTROLLER FOR ELECTRIC MOTORS.

APPLICATION IILED JUNE 21, 1904.

e SHEETS-SHEET 4.,

BEST AVAILABLE COP. p No 12,241. REISSUED JULY 19, 1904.

W. B. POTTER.

CONTROLLER FOR ELECTRIC MOTORS.

' APPLICATION rum) mm: 21, 1004.

(June/whoa L9IZHM v L I v .WILLIAMBPO TER." q iqwdwvz 55 AYAILABLE COP I w. BLPOTTBR.

CONTROLLER FOR ELECTRIC MOTORS.

- APPLICATION FILED JUNE 21, 1904.

REISSUED JULY 19, 1904.

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' BEST AVAILABLE-COPS Reissued July 19, 1904.

. STATES PATENT- OF CE.

WiLLIAM B. POTTER, on SoH NEGr D EW YORK, AssIGNon To THE 'l'o all whom may concern.-

GENERAL PORATION OFNEW YORK.

ELECTRIC COMPANY, BOSTON, MASSACHUSETTS, A COR-.

CONTROLLER FOR Euzc'rmc MOTORS.

sl m-non form ing part of Beisluod Letters mm 1%. 12,241, dated any 19', in. 024,398, dated ugint 14, 1894'. a! reissue filed June 21, 1904. Serial No. 2131120.- 1

' Be it known that 1, WILLIAM B. Po'r'rnn, a' citizen of the United States, residing'at Schenectady, county of Schenectady, State of New of my. controller.

'- York, have'invented certain new and useful Improvements in Controllers for Electric Motors, of which-the following is a specification.

My invention is illustrated inthe accompanying drawings, in which Figure 1 is an elevation, partly insection',

Fig. 2 is a series of diagrams showing several circuit connections established under the ,various conditions of the controller. Figs. 3,-'4, and 5 are details. Fig.

6-is a side-elevation, partly in. section, ofthe. controller. I the line a'a'of Fig. 1. Fig. 8 is a plan ofthe contact-cylinder'and switch. 7 Fig. 9 is a dia-' gram showing my controller applied to an.

electric tram-car sothat the same may be opj .erated from either end.' Figs. 10, 11, and 12 are details; Fig. 13 shows a modified form-of the invention. Fig. 14 shows an alternative form of locking. device. Figs. 15-and 16 are details'of the jeans." Fig. 17 is adetail of the cut-out lock. 'Fig. 18 is a' series ofcircuit connections produced by my alternative form.

- of controller. Figs.-19 and 20 are diagrams of circuits upon a more extended scale.

My invention relates to a controller known as a series-parallel controller, by which two or more electric motors acting upon a common; loadsas, for instance, an electric -locomotivemay be coupled either in series or in speed parallel in order to give-various degrees of and power to the drivenrnechanis' m, I

My invention {relates especially to the form of series-parallel controller invented'by H.

"Knight andinys'elf, illustrated and described in Patent No; 587,441, of August 3, 1897, the characteristiefeature of said controller being thatthe motors are first placed. in series with a resistance, the resistance is then cut out and the. momrsichangedfrom series to parallel by first .shuntingone' motor, leaving the other. motor in series with :a resistance, and then placing the two motors in parallel, further field-magnet strength. 7 The improvements which I have made are, first, a modification of the magnet usedto extinguish arcs on the con-' which the arcs are driven; third,- an arrange ment of the device by which one motor may tact-terminals; second, the application of insulating septa to the contact-surface against be cutout and the controller used to regulate theremaining motor; fourth, the attachment of a locking device by which it is impossible to operate the reversing-switch except at a time when the controller is in the proper condition; A fifth, an improved reversing-switch placed in: the same box with the controller, sixth, means for detainin'gthe switch at cer- Fig. 7 isa horizontal'sectionon tain points selected as working positions, and,

lastly, certain detailslwhich will be hereinafter described and claimed. I

Referring to the drawings, it will be apparent that my controller consists in general of 'a; switch of the cylinder type, the rotation of whichproducesv'arious combinations of the.

circuits terminating at the switch. Theci'r= cuit-terminals consist of a series of stationary contact-springs placed in a line parallel with the axis of the cylinder and bearing upbnsuitable contactringsor plates, which are fastened to the cylinder as to be rotated therewith andsuitably insulated therefrom. This switch is inclosed in a suitablecase provided with an external handle for. rotating the cylinder.

In Figs. 1, 6, 7,- -and 13,- D is the inclosing case,which is rectangular in shape, having one fiat sideadaptedito be placed in position against the dashboard of a car or against any "suitable supporting-wall.

E isthe shaft of the cylinder, adapted to be operated bythe' main handle F.

G is an. insulating-cylinder having a series of insulating-rings G upon which are fastened contact-plates H. These conducting plates are annular in shapeandform more or less complete rings, upon which a series of. contact-fingers respectively bear. I

-The contact-fingers are marked I, and, as

. shown'in F g. 7 "are each pivoted in a bracket '1', which isetteched to insulating-block J endformeia circuit-terminal, a binding-post being attached thereto for connecting aline wire. They are, as shown, coi'np'osed' of strips of metal l i'aving a kink orbend L their length," by which the furl-owing or g' roioving of the contact-stri ps isp1'evented. A spring? constantllv presses the contact-finger against the contact-n I H, and the range of movernent of the hng'cr is regulated by an adjust ing-screwf, It is obvious that as'the cyl} inder is fingers will be bearing upon the contact-plates at any one tinhe and that if suitable connection made betwec n. certainones; of thecon- 4 tact-plates the turning of the cylinder will cs tablish a definite series'of connections be tween the circuitsv which terminate at the respective contact fingersl'.

For interrupting any arc which; may be formed uponbrealting contact betweeriany of the fingers I and the contact-plates'H', I have. provided an electromagnetK, which is placed in the inclosing case adjacent to theswitchcylinder atit's middle point and whichis provided witha pivoted pole-piece N,iextlending laterally in each directiongfrom the core of the magnet. and terminating at a'point adjacent to the line of contact fing e'rsl. Theopfl posite end of the magnetbore rests against the back plate of the inelosing case, so that the latter forms a part of the magnetic circuit. A ridgeOfis'cast on the back plate of the inclosing case Data point opposite the pivoted pole-piece N. Carried by the polepiece" N is a box P, (see Figs. 1' and'i.) constructed of two longitudinally extending strips 7) p of insulating-material; Supported between these two strips 17'; and p are a series ofiinsulating septa pf,- hav ing extensions sha ted," as shown in Fig; 7,-t o' conforn1to the curvature of the cylinder andiadapt'ed whezi the pole piece N'i sin the position" shown in full lines to lie between the several contactplatesH. I v

The operation of this arcinterruptingjdevvice is as follows Any arc'swhich occur be? tween thejcontact-plate Hand the fingers 1 are forciblyldriven by the magnetic'field against the insulating septa or deflectors pf, which are placed transversely to the line in which the are is blown by the magnet, and said a'rcs'are. thereby spreadout on the surfaces of said septa or deflectors and cooled or smothered; The insulating-strips pf 71 serve to confine the heated gases'con'stituting' th'e'arcs, ahd' the chutes forrned by the septa p and the strips" gases away from the. switch cylinderi The wl'iolearrangern'erit' p'p? carry the heated serves to confine and extinguish the arcs in thc'liniitcd space available in a compact controller. -T-h e"pi'voted iole -piece N and he partsjcarricdthereby" may be swung outward, as'indicatedin dotted lines in Fig.7, so as to give ready access to the interior of the mechanisrn.

BES lQQl i- LECOH I rncd a greater or less number ofthe h is, however normally held in po sltlon bythe set-screwk/ In operating the en-trons it s desirable; that extra shank], be some means Ff Q tihg the different positions of the; switch where definite combinations of in somecases siinply attach to the cylinder a star-wheel Q,(sh0wn inv detail in' Fig. 4.) and provide a spring pressed lever Qflcarrying a friction-wheel QQ bearing in the notches of be so shaped that' a small'arnou ntof, force will be requiredto turn th'e'cvlind'er against the the cylinder WI] 1 naturally'come to rest at those positions in: which the friction-wheel Qf rests; in the notches. I usually prefer to combine switch. This switch is operated by aseparate. shaft U, passing through inclosing-casc l) switch itself may bepl'aced; in the same casingivith thesw itch -cylinder, as shown inFig. 13; or it may beplacedat' a distant point, in which case the shaft U passes directly through the 'in'clo'sing' case, as in Fig. 1 and'at its lower end is provided withconnecting"devices leading to the reversing switchi ,In either case ment for this purnose being'lshown in Fig. 14. The star-wheel Q'i'n-this case has attached to it al diskQ, in which is a socktQ, v This end of the bolt. The otherfendof the. bolt V is p'ivo-tedto a lever a, which car-riesia {rice tion-wheel a, engaging a notched cam a." on

a substautially'asthe lever Q bears against the" periphery of stariw licel Q; but the cain can only be turned when the end of ;int0 it the rotation of shaft'U and the con} sequent action of cam a uponlevena.

bolt/V, and that position is the one in which the handle F is in the ub'p'er extreme nosition,

"dicated Show the full ange; of m vement qt the handlein both directions, respectively. In the'former position the lnotor-c' mm is broken. The friction whcel (If rcsts then in the middle notch of cam a andit will be impossiblekto tu rn handle 11, as 'atthat time the bolt Vis insocket Q; When, however; the reversing-sw-itch iis.tfitnetl in one or'the'other of' its two-positions; the lielt'V will be withdrawn and the handle F can be turned. There is also provided a'rcniovahle handle for the shaft U, which, however. can only be the star-wheel. The notches ofthe -wheelIwill with thisflevice a lock fo rthe revcrsing' s'ocliet is ada'ptedto receive one end of' a bolt V when. it is rotated to a' point opposite the =V'isopposite'the socketQ so as to befforced,

circuits are producecLand for this purpose I pressure of lever Qf noon its peri 'ihery. and 1 "he. bolt 1"; T.

I Thereis only'oneposition.ofthe 3 whichwillb'ring the' soel cetQfinto line 'withjl (shown in dotted lines inFig. 14,) the lower extreme position being shown'hydotted lines "in'the sain'e figure,'-and the two posit-10$. ih' I I I 5 broken, and the reversing-s w itchcanbeturnedf. to itsintermediate'position with the circuit i middle position'with the circuithi'okcn. lii

Figs, and 16, b is the handle, which has a lug b extendingunder a flange b. on the cover of the inclosing case. This flange ib is cut away at its center, so that handle b when in itsintermediate position canfbe lifted, off.

, .The-object'of the locfing apparatus thus described-is to insure that the controller atone 1 end of the car is left locked with'thecirouit broken both at the reversing-switch and ,at the switch-cylinder and also to prevent re -v ,versals of'the motors except when the circuit is broken. As only one handle is provided for each car and there-is acontroller-at each 2 end of the car, it'ismecessary for the driver remove the handle andpoeeed with it tothe opposite-end of the car, and, as above dewhen leavingoneend of the car to threw his switch to the middle'position before he can 's'cribed,whien" in its middle positionthe reder locked. Upon removing the handle and versing-switch is open andv the switch-cylinproceeding to'the opposite end of the car it is necessary for. him to first throw his. revers ing-switch in one directionorthe other before he can operate his switch-cylinder to control the car.

' the series shown in Fig. 18.but the only difance.

In .Fig. 2' I have shown aseries'of diagrams illustrating the successive connections which are established by my controller. These may be modified somewhatris, I for instance, to

ference between the two is that the field-magnet strength in the former case is varied by short-circuitinga part of the coils and in the in Fig.2 or any other combination which may 'be desired I have, however, to avoid any 45' uncertainty-shown in Fig. 8 a plan of the switch-cylinder as arranged to producethe combinations-of Fig; 2, In said 8 the contact-fingers lare numbered from '1 to 11,

--inclusive, and the heavy vertical lines indicat'e 'the respective contactplates H, whilethe successive positions of the fingers on the platesare indicated by thedott'ed horizontal lines numbered, from 1 to 10. The plates H are interconnected; as indicated in the figure.

Of Fig. 9 it may-also be stated that the two motors marked, respectively, No; 1 and No. 2,are geared to opposite axles of a railway-car, and thetwo controllers on the two endsof the car, respectively, are oined by acable-contaming a number of wires, and

, from intcrmcdiate points of the cable connections are taken out to the motors, reversingswitches, &c; i

Fig. 205s a general diagram combining the partial 'diagramsof Figs. tie-{1d 9.; Referring ltoarmatureof -motor No. '1, to reversing- BEST AVAILABLE cos to'diagram 'Fig. 20, with the brushes onthe line 1 1, the circuit willbe as follows; trolley T, switches X and Y, to cut-out'Z, ,to lightning-arreste'r W, to magnet M, tobrush 1, to

block H, cross-connected to block H, to brush 2, through the resistances R R1, toswitch A, to. field'of motor No. 1, to reversing-switch 0,

switch C, to switch A, to brush 10, connected to brush 9, to block H cross-connected to block H, to brush 7,'to switch B, tofieldflofmotor No.2; to reversing-switch U, to armsture of motor No; 2, to reversingsswitchQ to ground. Withthecircuits arranged-as above the two motors are in series withall the resistance in.

With the brushes'on the line 2 2the circuit will be as follows; trolley T,'switches X and Y, to cut-out Z, to lightning-arrester W, .to magnetM, to brush 1, to block H,'cross-connected to block H, to brush3, to resistance R', to switch A, to field of motor No. 1, to reversing-switch C, to armature of motor No. 1, to reversing-switch C, .to switch A, to brush 10, connected with brush 9, to block H, cross* connected to-block'H', to brush 7, tolswitch B, to field of motor No. 2, to reversing-switch C, to armature of motor-No. 2', to reversing- 7 switch C, to ground. With the circuits arranged as above the two motors are in series. with a part of the resistance cut out;

Withthe brushes on the line 3 3 thecircuit will. beasfollows: trolley T, switches Xand Y, to cut-out Z, to lightning-arrester W, to magnet'M, to brush 1, to block H, cross-con nected to block H, to brush 4, connected to .brush 6, to switch A,to fieldof motor No. 1,

to reversing-switch G, to armatureof motor No. 1, to reversing-switch C, to switch A, to

brush 10,. connected 'to brush'Q, to block H",

cross f connected to block H, to brush 7, to" switch B, to field offmoto'r No. 2, to reversingswitch C, to armature of motor No. 2, to "reversing-switch C, to ground.' With the cir-- series with the resistance out.

cuitsarranged'as above the two motors are in Withthe brushes on theline 4 4 the circuit-- will be as follows; trolley T, switches X and Y, to cut-out Z, to lightning-arrester W, to]

magnet M, to brush 1, to block H, cross-con nected to blocks H and HJ Herethe circuit i divides, one path being through brush 4:,connected with brush 6, tol'switch A, to field of motor No. '1, and the other being through block H, to brush 5, to switch A, toloop on motor Noi 1, through a part of the field, and

uniting again with the main circuit to'the reversing-switchb, to'the armature of motor- No.4. to reversing-switch C, to switch A, to

brush 10, connected to'brush 9', tobloclgHd,

through block H, which isbross-connected to block H, to brush 7, toswitch to'fi Id of motor N o. 2, and the other through bl" H",

\ cross-connected to block H; to brush to where the circuit 'divideq one path being I switch ll, to loop of motor No. 2, through a part of the fieldand uniting with the main circuit, to the reversing-switch C, to armature of motor No. 2, to reversing-switch C, to ground. the two motors are in series with the resistance out and a shunt placed around a portion of each motor-field.

With the brushes on the line 5 5 thecircuit will be as follows: trolley T, switches X and Y, to cut-out Z, to lightning-arrester W, to magnet M, to brush 1, to block H, cross-connectedtoblock H, to brush 3, to resistance R, to switch A, to field of motor No. 1, to reversing-switch C, to armature of motor No.1,

to reversing-switch C, to switch A, to brush connected to brush 9, to block H, crossconnected to block H, to brush 8, to switch B, to loop of motor No. 2, through-a part of the field, to reversing-switchO, to the armature of motor-No. 2, to reversing+switch (J, to gro'u nd. With the circuits arranged as above the resistance is partially out and motors No. 1 and No. 2 are in series with it and a part of the field of motor No. 2 is open-circuited.

With thev brushes on the line 6 6the circuit will'be as follows-: trolley T, switches X and Y, to cut-out Z, to lightning-arrester W, to magnet M, to brush 1,- to block H, cross-connected to block H, to brush 3, to resistance R, to switch A, to field of motor No. 1 to re-. versing-switeh C, to armature of motor No. 1, to reversing-switch C, ,to switch A, to brush 10, where the circuit divides, one path b'eing through block .H,'eross-connected to block" H, to brush 11, to ground, the other path being from brush 10 connected to brush 9,.to block H cross-connected to block H, to brush 8, to switch B, to loop of motor No. 2, through a portion of;the field, to reversingswitch (I, to armatureof motor No. 2, to reversing-switch .C, to ground. cuits' arranged as above the resistance is partially out and motors No. 1. and No.2 are in series with a part ofthe field of motor No. 2

open-circuited'and a shunt placed completely around-the motor, thus connecting motor No. 1 directly to ground.

W ith the brushes on the line 7 7 the circuit will be as follows: trolley T, switches X and Y, to cut-out Z, to .lightning-arreste-r W, to magnet M, to brush 1, to block H, cross-connected to block 'H, to brush 3, to resistance R, to switch A, to field of motor No. 1', to reversing-switchU, to armature of motor No. 1, to reversing-switch C, to switch A, to brush 10, to block H, erossaconnecwd toblock H, to brush 11, 'to ground. With the circuitsarranged as above the resistance is partially out and motor No. 1 is in serieswith it and connected directly to ground. Motor No. 2 is open-circuited. v v

With the brushes on the line 8 8 the circuit will he as follows: trolley T,switches X and -Y, to cut-out Z, to lightning-arrester W, to

With the brushes arranged as above nected to brush 6.

\Vith the cir- BEST AVAlLABLE coPw magnet M, to brush 1, to block H,-cross-connected to block H to brush 3, to resistance 1 R. Here the circuit divides, one path being to switch A, through field of motor No. l, to reversing-switch G, to armature of motor No.

1, to reversing-switch C, to switch A, to brush 10,, to block H, cross-connected to block H, to'brush 11, to ground, and the other from R to brush 6, to block H", cross-connected to blockH", to brush 7, to switch B, to field of motor No. 2, to reversing-switch v(J, to armature of motor No. 2, to reversing-switch C, to ground. \Vith the circuits arranged as above the resistance is partially out and the two motors are connected in multiple.

With the brushes on the line9 Qthe circuit will be as follows: trolley T, switches X and. Y, to cut-out Z, to lightning-arrester W, to magnet M, to brush 1, to block H, cross-connected to block H to brush 4 connected to brush 6, where 'the circuit divides, one path being .to switch A, through field of motor No. 1, to reversin -switch G, to armature of motor No, 1, to reversing-switch (1,to switch A,

to brush 10, .to block H, cross-connected to H, to brush 11, to ground, and the other from brush 6 to block H", cross-couneeted to motor ,No. 2,to reversing-switch (I, to armature of motor No. 2, to reversmg-swltch'C,

to ground. With the circuits arranged as above the resistance is out and the motors are connected in multiple.

With the brushes on the line euit will be as follows: trolleyl, switches VV,to magnet M, to brush 1, to block H,

' cross-connected to blockzH, where the circuit divides, one path being through brush 4, con.-

Here the clrcuit div des again, the-mam circuit being to switch'A,

through the fieldot' motor No. 1. Going-back to wherethe circuit first divides atH", there is a shunt path which is connected toiblock' H, to brush5, to switchA, to loop on motor No, 1 ,through a part of the field, where it u nitcs with the main circuit, tothereversing-switch C, to armature of motor No. 1, to reversingswitch C, to switch A, to brush 10, to block ,H", cross-connected to block H", to brush 11, to ground.- Going back to blockH", the cirj cuit is as .follows: block H, to brush 4 connected to brush 6, to blockH", cross-connected to' block H, and here the circuit divides again, the main path being through brush 7, to switch B, to' fieldof motor No. 2, and the shunt path, from block H cross-connected to block H", to brush 8, toswitch B, to loop on motor No. 2, through a part of the field, and here it unites with the main circuit, to

reversing-switch C, to armature of motor No. 2, to reversing switch (1,150 ground. With the circuitsaarrangedas above the resistance is out and motorsNo. '1 and No. 2 are in multiple, with a part of each field shunted. Thus 1010 the cir- 10 'Xand Y, :to cut-out Z, to-lightning-arrester BTEST ggy/ism cor-1i it will beseen that theseverai conditions of the circuits indicated in Fig; 2h'ave been-suecessively brough't'abjout'by the rotation of the switch-cylinder.

It should be notedat this point-that not all the circuit conditions of Fig. 2 are such that;

should be maintained for an'indefi'nite period.

'Certainot' these conditions are only tempo: 'rary, which exist in passing irom one to another ofthe conditions which maybe comparatively permanent.

5 correspond to .those positions of the switch .known as running ?-positions' that is, the;

are'conditions which afi'ord successive regu* lating steps and may be'maintained so long? as the driver desires to proceed at the "rate. of speed that. theseseveral conditionsgive; The other conditions correspond to. What s knownas. intermediate conditions of-the switch-cylinder and 1 are cond t ons winch should be maintained only for a shortjtime that there shall be no notch between the'pois provided into which the'wh'ee'l drops when the motors are at rest with the circuit-broken.

sitions 4 and 8, and the driver will know that he is not to'all0W his switch-cylinder to re main for any length of time at the intermediate positions between 4 and :8, but is to turn until he feels that the friction wheelQ .lias dropped into a notch. In Fig. 4 the wheel Q is in notch No. 10, which is the positiongiving the highest speed. An adjacent notch 1t isof course impossible for the driver, to

pass directly from notch 10 to the ofl1-'notch,. as the one last described is de'signatcd, as there is a lug on the underside of the handle which engages with av projection onthe top of the inclosihg case, which stops the rotation,-

so that it is only possible; to pass from notch 10 to the off notch by a reverse movement of the handle through the positions preceding 10 until. the last or oif position is reached:

which form a modification of those in Fig.2, differing therefrom in respect to-the method of changing the field-magnet strength, there ing their magnetiostrength.

being in the latter case a shunt containing a resistance connected between the terminals of the field-magnet to reduce the amount of current flowing in their coils, thereby reduc In Fig. 19 1 have shown a diagram indicating all of the circuits with the controllingswitch, it being understood that the diagram of Fig. 19 presupposes an arrangement'in' The latter conditions connected in series: with full resistance.

., .VVith the brushes'on' the line-2 2 the circuit car-body and the motors driving the respec switch bcingincluded in the same boxwith the controller-switch and of the same'genera'l I construction.th at is, there are a series of.

stationary -.contact fingers connected to the circuit-terminalsand a corresponding series.

of contact-plates on the cylinder, which serve.' to combine inany desired manner the circuits .terminating'atthe contact fingers. This medi f fiedseries of circuitconnec'tions may be traced in detail.withrefereuccto Fig; 19 as follows;

practice-like that-shown in -Fig.9; but it is'\ I not essential to indicate-for a second time the tiveaxlesf Ihavealso shown in Fig. 1-9 a "reversing-switchlike that'of Fig. 13',- this -IVith the brushes on the line 1 1 the'circuit-willjb'e as relics-vs: trolley T, to nagn'et .M,'.to. brush 1, contactsblock H, cross-con 1 nectedtqblock H yto brush 2, toresistance R=R, ,switch-*A; to -.'reversing-switch Coontact'1", .armature of.';motor No 1, toreversingswitch 0. contact 2', to field of. motor N0. 1, to-

switch'A, to brush 9., c'ross connected to brush 8," to block-1H, cross-connected to blockIF,

to brush 6, "switch-B, to: reversing switch reversing switch contact-4', to switch "B, to

I field otmotor No.;2,to,grouiid. i/Vith the circuit arranged as above the" two motors are;

the resistance is out. Q

' With'the brushes on the will be the same as above, except'that a part of 1111,53 t me arena willbe as follows: trolley'T to rnagnet M, to"

brushail, to'block Hf cross-connected to block of, motorkNo 1, to. reversing s'witchC-con- 'sistance all out, 7 1

With the. brushes-on the line 4 4 the circuit will be as follo-W'sc-trolley T, to magnet M, to brush 1., to block H' cross-connected to block H*,,to= brush 4 connected to brush 5,.to switeh In Fig; 1.8 I haveshown'a set of conditions A, to reversingswiteh C contact 1', to armature of motor No; 1, to -reverlsingswitch C contact 2', to field of motor No, '1.

tween brushes 9 and Sand cross connection between blocks H H", and H, crossconnected'to block H to brush 6, to switch B, to reversing-switch C contact 3, to armature of motor .No. 2, to reversing-switch G contact 4, to switch Here the circuit divides Here the -H*-,..to' brushi-{iconnected to 'bru'shfi, to switch g A, 'reversing-swi-tchf G contactfl, to armature again, one path being through field of motor No. .2 to ground, the other through shunt resistance S, to brush 11, to block .H, crossconnected to block H, to brush 10, to ground. With the circuit arranged as above the motors are in series with the resistance out and a resistance in shunt field.

With the brushes on the line 5 5 the circuit placed around each motorwill be as follows: trolley T, to magnet M, to

nected to block H to brush 6, to switch B,

to reversing-switch C contact 3, to armature of motor No. 2, to reversing-switch C contact 4, to switch B, to field of motor No. 2, to

- ground. Viith the circuits arranged as above the two motors are in series with a part of the resistance out.

With the brushes on the line 6 6 the circuit will be as follows: trolley T, to magnet M, to brush 1, to block H, cross-connected to block 7 H to brush 3, to resistance R, to switch A, to reversing-switch 0 contact 1, to armature of motor No. 1, to reversing-switch (I contact 2, to field of motor No. 1, to switch A, to brush 9. Here the circuitdivides, one path being through brush 9.; to block H ,cross-con-' nected to block H, to brush 10, to ground,

and the other through brush 9 connected to brush 8, to block H, cross-connected to block H to brush 6, to switch B, to reversingswitch 0 contact 3', toarmature' of'motor No. 2, to reversing-switch 0 contact 4, to

switch B, to field ofmotor No. 2, to ground. With the brushes arranged as abovethe resistance is partially out, motors No. 1 and No. 2

are connected in series with it, and'a shunt is placed around motor No. 2.

With the brushes on the line 7 7 the'circuit will be as follows: trolley T, to magnet M, to brush 1, to block H, cross-connected to block H, to brush 3, to resistance R, to switch A, to reversing-switch C contact 1, to armature of motor No. 1, to reversing-switch 0 contact 2, to field of motor No. 1,' to switch A, to brush 9, to block H cross-connected to block H, to brush 10, to ground. With the brushes arranged as above the resistance is partially 5 out and motor No. 1 is connected in series with it to ground, leaving motor No. 2 opencircuited. The object of having. this long step between 4 and 8 is to give time for the circuit to open when returning from multiplc to series position, and thus avoid short-- circuiting the motors. Thisstep will be more clearly seen by referring toSheet l, where the star-wheel is shown which regulates the movement of thecylinder step by step.

With the brushes on the line 8 8 the circuit will be as follows: trolley T, to mam M, ,to

. BEST AVAILABLE com brushl, to block H, crossrcon'nected to block H, to brush 3, to resistance R. Here the circuitd-ivides', one path being through-brush 5,

to block H, cross-connected to block H, to brush 6, to switch B," to reversing switch C contact 3', to armature of motor No.2, to reversing-switch C contact 4,'to switch-B, to field of motor No. 2, to ground. Going back to resistance R the other-circuit is as follows: switch A, reversing-switch C contact 1, to armature of motor No. 1, to reversing-switch C contact 2', to field of motor No. 1, to switch A, to brush 9, to block H, cross-connected to block H, to brush 10, to ground. With the circuit arranged as above the two motors are connected in multiple with a part of the resistance out.

With the brushes on the line 99 the circuit will be'as above, with the exception that all the resistance is out.

With the'brushes on the line 10 10 the circuit will be as follows: trolley T, to magnet 'M, to

- brush '1, to block H, cross-connected to block H, cross-connected. to block H, to' brush i connected to brush 5, where the circuit-divides, one path being through switch A, reversingrswitch 0 contact 1, to armature of motor No. 1, to reversing-switch 0 contact 2'. Here'the circuit divides again, one path being through field of motor N o. 1, to switch A, to brush 9, to block H cross-connected to block H, to brush 10, to ground, the other path being through shunt resistance S, to switch A, to brush 7 to block H cross-com nected to block H, to brush 10, to. ground. Going back to brush 5. where the circuit first divides, the circuit will be as follows: brush 5, to block H, cross-connected to block H", to brush 6, to switch B, to reversing-switch C contact 3, to armature of motor No. '2, to reversing-switch 0 Contact 4, to switch B, where the circuit divides again, one path being through field of motor No. '2, to ground, the other being through shunt resistance 'S, to brush 11, to block H cross-eon nectcd to block 11 4, to brush 10,- to ground. With the circuits arranged as above the two motors are connected in multiple with the resistance out and a resistance in shunt placed around each motor-field.

" There remains to be described ther'zut-out Y switch by which either motor may be'cut outwhere they are located on the back plate of the inclosing case at'a point below the cylinder.

The diagrams of the circuit-connections of the switches'are shown in Figs. '8 and 20 forone form and in Fig. 19' forthe other form of thecontroller. The switch'A, which cuts out motor No. 1.

BEST AVAILABLE COP: y "1 4 7* consistsof threelpivoted'bars'anda common; the circuit with} the brushes onthe lineil 1 is handle therefor-, andthe switch B, w-hichfcuts as-"follows; trolley. T,sWitch'es-'X.and:Y,- to

out motorNo. 2, issijinilarly constructedwjith, *out-ont-Z, to lightningfarrester W, t'o magnet" .two bars, v v r I 1 M, t brI'ILsli- 1", v to ;bloc k,lHf, cross-connected i; [The switches arenormallyi-n thedependent so" block H", tobrush .2, to resistance R R, to 70 f positions shown in'F-ig': l," 'i'n' w1l1ich-case they, switchto-field ofamotor No 1, to revershav'e noinflueIi-c'e-"npon thecircuits, wrhen iing-sw-itchC, to armature of motor No. 1, tov it is"desirable to joperate eith'erof thermfthey] reversing-switch (J, to switch'A, tobrush 10, are lifted into a' vertical position, asshown by" "connected to brush 9, to block H ,;cross-con idl-the'dotted lines.in-FigQSJWVhen eitherswi tch nected' -toblockHi, to brush 7, to. first'pole of 75 "is' first li fted, it throws a stop intoithe path of switch B, -to ground. Motor No/l is now rotation offthe cyliDderQand thu'sllocks it so connected in series with theresistance. p that it; cannot betuin'ed beyond the fourth With-the othenform'of controller the denotch. Themec'hanism of. this lock is shown tails of the" circuit are as follows: With the '15 in Fig. '1 and. more inydetail in Fig; 3. In switchA, Fig. ;1"9,"thrown into .the position v the latter figuremA is tone of the bars of shown'in'dotted linesmotor No. -1 is cut out" .he switch and'Aithe handle; \Vhen the and the contact-'cylindercan onlyrevolve as switch is in ,the elevated position shown, far as the fourth notch on accountof the lock. the handle comes intocontact with abolt A With the switchA arranged as'above and the ac and forces it inward, so that it forms a. stop brushes on 'the line 1 1 the circuit 1 is'as fol- "for an arm A,-Figs. 1 and ,3, on the shaft of lows: trolley T," to magnet M, to brush 1, to the cylinderfi The rotation of the cylinder. block H, cross-connected to block H to brush wiIIQtherefOre' be limited,fas appears more 2, to resistance RR, to firstpole ofv switchA, clearly in' Fig. 5, in such a" manner that. with fcrossconnectedto middle pole, to brush 9, con- "2 5 one motor only in circuit itcan only regulate 'nected to-brush 8, to block Hi, cros's-con- 99' that motor by means of the resistance, 1 n ected to block Hi, to brush 6, to switch B, to InFig. 13'is shown another form of lock, reversing-switch ()Icontact 3', to armature of thedetailsof which are illustrated-in Fig. 17. u motor 'No; 2, to reversing-switch C' contact Is this figure there is simply an intermediate 4, to switch B, to field of motor No.,2, to 3o lever between'the handle A and the bolt A ground; With theswitch B thrown up into 95 This intermediate piece is markedA. The positionshown in dotted lines motor No.2 is outer-end of piece A is cam-shaped; so that cut out and the lock-"prevents the cylinder the upward movement of the switch-bar and from revolvi'ngjheyond the fourth notch, the the' consequent engagement of lever-handle same as before,and th'eci rcuit with thebrushes 5 A" with the cam-surface of Alf forces the on the'line 1- .1 as followsz: trolley T, to I00 outer-end of the said piece down and. the inner magnet M, to brush l, to blockH, cross-conend up, which acts thereby to put the bolt-A nected to block H to brush 2, to resistance into the path of the arm A. \Vhen the form R R, to switch A, to reversing-switch C con- .of switch which produces the circuit cQnnectact 1, to armature of motor No. l, to revers- 40 tions shown in Fig. 2 is employed, the circuit ing-switchC contactQQto field of motor N o. 5 in detail will be as follows, it being under: 1, to switch A, to ;brus'h 9,- connected to brush 'itOOd that the switch Acuts out motor N03 1. 8, to block H, crossconnec,ted to block H and the switchB motor No. 2 in each instance. I to'brush 6, to first pole ofswitch B, to ground.

Withthe switch A, Fig. 8, thrown up into Motor No. 1 is now connected in series with 5 position shown in dotted lines motor No. 1 the'resistance,

' willbe out out, and the cylinder can only re- 3 It is obvious that many matters of detail volve as faras the fourth notch on account of which I have shown in connection with my the .lock. with the switch A arranged as controller do not necessarily. take the exactaboveand. the brushes on the line 1 1, Fig. 20, form which I have used for illustration, but

the circuit will be as follows? trolley T,v may be altered inany waywithoutdeparting I 5 switches X and Y, to cut-out Z, to lightning from'the s'piritiof myinvention. V arrester W, to magnet M, to brush 1 to 7 What I claim as new, and desire .tosecure hlock Iilflcross-conne'cted tolblock H to brush by Letters Patent, is.

2,,to' resistance R R, to middle pole of switch 1. The combination in an electric controller,

A, CIQSSiCODHGClSP/d to first pole, to brush 10, of aswitch having a multiplicity ofcontacts, I26

connected to brush 9, to bl0ck'H ,-cr'oss-'conand a blowroiltmagnet havingacom'mon polenected to block H, to brush 7 to switch B, piece extending fromacommon-core-topoints to fieldof motor N 0. 2,130 reversing-switch C, adj acent to the several circuit-breaking points to armature of nnotor No." '2, to reversing of the switch.

switchC,1toground. MotorNo.2is now c on-' 2. The combinationin anelectriccontrol'ler, 25

nected in" series with" the resistance. 'With of a cylindrical switch having-a series of" inthe switchB thrown up into position shown sulated contact-platesadaptedto engage with in dotted lines motor N o. 2 is out out and the a corresponding series of stationary contactlock prevents the cylinder from revolving be .fingers'jand a magnet having an extended pole- 5 yond the fourth notch, the same as before, and .piecereac'hingto points adjacentito the several Y the motors, and a lock for each switch con;

- adapted to be interposed between the con- 2 .ing points of the switch, so placedthat an BEST AVAILABLE cop,

, 4. I'n a'series-parallel controllen'a cylinder carrying contacts and brushes bearing-upon -such contacts, the brushes havinglkinksor. bends in: their lengths; whereby the formats tion of groove'sor furrows in the cylindercontacts is prevented,

A ,5. In a series 'parallel controller, a series of contacts upon a cylinder, a series of fixed contacts cooperating with them and a series of insulating septa"carried upon an arm and v tacts, as described.

. 6. Thecomb'inationin an electric controller, of-a switch for connecting two motors either inseries or in parallel, a reversing-switch for trolled by the remaining switch. 1

The combination in an electric controller, of a switch for connecting two motors, either in series or in parallel, a switch for reversing the motors, alock for the former switch, and,

a connection between the said lock and the latter switch by which the former is held from moving while the latter is in its middleposition. A V

- 8. Thecombinationin anelectriccontroller, of a switch for. connecting two motors, either i in series or in parallel, a reversing-switch, a

lockfor the latter. switch, and a connection with the former switch whereby the latter is held against movement except when the former is .in a position to put the two motors in series.

. 9. The combination in an electric controller, of a switch for 'putting two motors either inseries or in parallel, a reversing-switch, anintermediate lock for the two switches, and a removable handle for the reversing: switch provided with a lock preventing its: removal when in either of its extreme positions.

10. The combination with a switch,'of,a mag net'having its poles adjacent to thelcontactbreaking points of the switch,- and an arc; deflector'also adjacent to the; contact-breaks are between the. contact-breaking points is driven against the same by the influence'of the magnet.

11. The combination with a switch,of a magnet .having its poles adjacent to contact-break-' ing points of the switch, a deflector'located transversely to the line of the are as driven by the influence of the magnet, and a chute or chimney for confining and conducting, away the lieated gases constituting said are.

12. The combination with a switch, of a magnet having its poles adjacent to contact-breakingpoints of the switch, a transverse deflector against which an are between the contactbreaking pointsis driven by the influence of the'magnet, and a chute or chimney having walls placed transversely to the line of the are for confining and conducting away gases constituting said are.

the heated 13 The'combination with a switch having a multiplicity of contact-breaking'points, of a magnet having its'poles adjacent to said points,

transverse deflectors against which the arcs be tween the contact-breaking points are driven :by the. influence of the magnet, and a series of chutesor chimneys for confining and carrying away the heated gases constituting said arcs.

14:. The combination in an electric controller, of a switch having a multiplicity of contacts, a blow-out magnet provided with a pivoted pole-piece reaching to points adjacent to points of contact on said switch and an insulating structure fastened to said pole-piece,

provided with walls-inclosing each of said contacts and adapted to be swung outward from said contacts.

15. The combination in an electric con-. troller, of a switch for connecting two motors, either in series or in parallel, acut-out switch for connecting one terminal of the respective motors to the opposite line, and a stop for the series-parallel switch controlled by the cut-v out switch.

16. The combination in an electric controller, of a switch for regulating two motors in series, and then changing them to'parallel, a cut-out switch for each of the two.motors, and a stop controlled by the cut-out switch for limiting the main switch to its regulating positions.

17. The combination in an electric controller, of a switch for regulating two electric motors in series by means of resistance, and subsequently putting them in parallel, of a cut-out switch for each motor having contacts arranged to leave the remaining motor in series with the said resistance;

18. The combination in an electric con troller; of'a switch for regulating two electric motors by means of a resistance, and then changing them from series to parallehwith'a cut-out switch for each motor, a stop controlled by' each of the. two cut-out switches,

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