USRE11840E - Tric railway system - Google Patents

Description

. Reissuedluly lo, |900.

W. GBUNDW, ln. Y conTAcT SYSTEM -Fon ELEcTmc nA |LwAYs.

n Application sied my 29, 1990.)

5 Sheets-:Shut l,

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' y w. anunow, 1n. CONTACT SYSTEM FUR ELECTRIC RILWYS.

(Application meri my 26, 1900.)

5 Sheets-Shu! 2.

ha. ",8310. mim my lo, |900.

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CQNTACT SYSTEM FUR ELECTRIC RAILWAYS.

' missueu my lo, |900. w. anuuow, 1n. CUNTAGT SYSTEM FUR ELECTRIC BAILWAYS.,

Application tiled May 29, 1900.)

5 Shouts-Shut 4..

m. 0,040. neissued July lo, |900.

w. snunow, m. f SUNTAGT SYSTEM FUR ELECTRIC RAILWAY (Appxcation' med may 29, 1900.)

5 Sheets-Sheet 5.

l, ffy-UNITED' STATESBATNT '@Fl-l To all whom .it may concern,.-

-WILILIAM GItUNoW, JR.,V onRIDeI-IPORT, CONNECTICUT,.AsSIGNomBY DlRECT AND MESNE AsSIGNMEN'IS,v To TBE MoELRoY-GRUNOW ELEC,-

'rmo RAILWAY erspart, or JERSEY infra',l NEW JERSEY.

nonTM-irV siisTEMFonsLl-:crmo RAlLwAvs.

f srEcnxcArIoN forming pm ef minnen Letters getest No. 11,4o, dated July io, 190e. Original No. '831,073, dated August 15, 18919. Application for reissue led lay 29, 1900, Serial No. 18,449'.

Be' it known that I', WILLIAM GRUNOW, Jr.,

a citizen of the United States, and a resident of Bridgeport, inthe county of Fairteld andY State of Connecticut, have invented certain new and useful Improvements in Contact Systemsfoi' Electric Railways,o f which the following `is agspecifcation;

' ing means ih the nature of coils for enacting.v

My invention is directed particularly to improvements in contact systems for electric railways like that disclosed in 'a prior patent, No. 586,845, granted to me on the 20th day of July, 1,897 and its objects are, first, to devise for such systems of electric railways a free or independent contacting electromagnetic terterminal is provided with means for'iectng the preliminary excitation or magnetization ing electromagnetic terminal with sectionalis'uchV contacting or working conductor` manner that said working conductors normally dead ordisconnected from-the current-feeder or main and adapted to beauteele passes thereover and without the aid of magnets on board 'of thecar; third, to pr'ovide a contact system for electric railways with free or independent contacting electromagnetic terminals located-in switch-boxes @contact-receptacles, said terminals-I havthe preliminaryexcitatigrror magnetization thereof and'in such manner-esito cause them to auto'maticallyclose the circuit between the current-feederormaln and source of current- V--supply through branch feeders to the working conductors dr surface contacts which supply the current directly to the motorsV on board a car as it, passes thereover, the arrangement beiig s ncli that ou discontinuancev o! the current through-said lcoilsthe terminals are caused to interrupt the `circuit by Ireason of their own weight or by the action of gravity; fourth,to provide acontact sysmatically-'connectcd thereto as a car or vehitem for electric railways with free ,or inde,L

nale located in switch-boxes or contact-receptacles, said terminals having means in the the preliminary excitation or magnetization named coils in maintaining' the electromagnetic terminals in electrical contact with the contacting or Workingl conductors as a car passes thereover, the arrangement being such coils cach independent*electromagnetic terminal will be restored to its normal position ysuch a system of independent contactingeleot'romaguetic terminals, in combination with contact-ingor working conductors, a source of current-supply, and a current-feeder or main, that the electrically-propelled cars or fore-mentioned patent .and this without the use of eleotromagnets on the cars; sixth, to provide a free or independent contacting eleotromagnetic terminal having means for effecting the preliminary excitationor magnetization thereof with means for overcomingor residual magnetism in the terminal, so that it my invention being particularly pointed out in the'claim's at the end of the specification,

Figure 1 of the drawings is a cross-sectional view ot the road-bed of a street-railway, illustrating the manner of securing the track or service rails and sections of the contacting or working conductors in position,

ing shownin elevational view. Figs. 2, 3, 4,

that after the circuit is broken at thev surface' Acontacts or conductors through both sets of avoiding, as may be desired, the effects ofl pendent contacting electromagnetic termithereof andthe other for aiding the firstvehicles may be run thereover 'at a'higher rate of speed than was possible with the a1- w' rangement of apparatus disclosed in my bewill immediately detach'itself' from its fixed p 'or stationary armature when the energizing one of the switch-boxes or contact-receptacles and the current-collector or trolley-shoe benature of twoA sets ot coils, one for effecting 55V- nd 5 are part diagrammatic part perspec- 4we tive viewsillustrating various ways of .ap-.y

plying my invention to a surface-contact system of electric railways. Fig. 6 is a side elevational view of` the arrangement of circuits shown in Fig. o, illustrating also diagram.-

,matically a storage battery, an automaticicut-ont device, a controller-,fnde 'correnti' collector or trolley-shoe, all carried byafcar. .Q

Fig. 7 is a longitudinal sectional view of que of the switch-boxes or contact-receptacles vand theinclosed free orindependentcontactf ing electromagnetic termi-nal, together' withV the circuit connections for said terminal; and Fig. S is a plan viewof th'esamc as seen look'- ing at Fig. 7 from the top towar'd the bottom of the drawings in the direction ofthe arrows, the coveighoweyer, having'first been removed.

Fig. 9 is a side elevationalL view'oi1 the en manner of attaching the same to sake; and Fig.'

larged upper ends or poles of the-fbipolarelectrcmagnetic terminal, together with the copper contact-plate thereof, illustrating also the y the `.mag-v neqtie poles of the terininal;` andpliig, lOisfa tr( nsvcrse sectional viewnfthe sa|n`e, taken through Fig. 9 on the line-,rtl a". and as'tseen looking there'at from the. bottoiit'toward the, top of the drawinm Fig. v11'is'a'viewasimi-` lar to Fig. 9 of a modified iorm of the terminal, illustrati-ng a carbon contact.q

plate in place of the copper eontact-platcgf Fig. 12 is a sectionalyiew similar in all reA spects to Fig;y 7, except that kthe'added fea; ture of the feeder-coils, which aid the shuutcoils in holdingihe terminal in upperorcon` tacting position are here shown'.

lar magnetic terminal cores, illustrating also the electrical connectioii thereof witlnthe, flexible bands or conductorsgvhich lpermit the electromagnetic terminal'tfo partake of a free 01' independent movement, thc shuntcoils being omitted in 1t is a side elevational view thereof as seen'looking at I'ig. "l from the left toward theright-the feeder-coils, how-v ever, being omitted in this View. Fig. 15

a perspective vieur of the flexible bands .or

conductors, which permit thel magnetic terlninalsto partake ci' free or independent movement, this ligure illustrating also the' manner of connect-ing said bauds orl conductors to one ot' tho branch i'eeiicrs.l

Like numerals` and letters of rcl'crcuce rcp resent similar or equivalent parts wherever used throughontt-his specification ma in the drawin'ffs accompanying the same. n

Referring now to 'the drawings in A.detail and first to Eiga-.1 tlicrcof,1 ;lic numeral 1 rep: fesentstlfc track or-service railsgof usual construction, spiked or otherwise secured 'to`yr uponwhich is lsecuredacontincross-.ties

.i ,if preferred, crcosotcd 'wooo ,uhshtntoil therefor. of thc timber n L e: cd manner twin rn'doubt.;contactingon 1 lingwnduf 'efxit of anywrcferrcd form,

n `blocks may? .To he uppersur-- ,ot-that' parts" i Fig. (iii isa topplan view'of the feedeccoils about thebipo-V this View forclcz'trness andthe endslthereof may be inclined or beveled, so as to lessen the impact of the currentcollector ortrolley-shoe asit passes thereove'r. v7

If desired, a metallic brace 5 may be secured toi-the cross-ties inside 'of the' track 0r service` rails 1 1 to provide additionalistreugth and rigidity therefor. Said track or service rails are-suitably bonded or connected to- 75 gether so as to constitute a return-conductor for the current to the power-house dynamo or generator'. f

6 represents one of the water-tight swilchf boXesyor contact-receptacles, preferably se- 8o cured by spikes or bolts 8, extending through openings` 42 in lugs or ears 7 into the crossties. (See also Fig.` 8.) Each of theseswitchboxes or contact-receptacles 6 is provided Vwith a tubular projection Q, adapted to re- 85 ceive a branch feeder 10, connected' to the cur- 1 rent-feederor main l1,asshown.l Said switch- Yboxes. or contactfreceptacles li are also provided wi'tjhmetallic tops or covers 12, pref-,l yerably of magnetic material, for the purpose 9o of constituting fixed or stationary armatures A-for the movable, tremor independentcontacting electromagnetic terminal in saidv boxes, l as will be more fnllXLleSCli-bcdlater-on. Each lQtthesetops ork covers 12 is connected by 'a 95 bond-,Wire-or conductor 1S with its adjacent contactingor. working conductor 4, and, if p1:ej.`err`ed,.said workiugfconductors may be Y separated 'longitudinally by any suitable insulation 14, that section ol' thoco'utacting or 1o, 1 ,working conductor 4, more remote from the switch-box or contactreceptacle 6 being pref-' crablyconnecteddirectly toene of the.traelr:b or; service rails 1 bya shunt-corniuctor22j1"R I which includes in its circuit the coils of Lilie 'rcs electromagnetic sufitching'nieclianism within -the'box,`b,utjnot sllowiuin this ligure of theli dra'u'ingsg f v is a current-collcetor or trolley-shoe of -i any; preferred formadapted at all times t 'no restupoii and bridge the contacting or workv ing conductors" 4- 4, said `trolley-shoe being y,carried bya car in auyprcferrcd manner and `connected electrically withthecontroller, mp0- tor,aud generalV wiring of afca'lby a coni155, @doctor 2l, as shown in Figs. 2,752.4, and 5.' .l

lp Fig. if. is illustrated .twin or double se iactingorWork'iug conductors 4 4,y 1 one oti'twhich is 'connected by the bond-Wire cor conductor '13 with the top or cover l2 of 12o '1the':switch.boxfor contact-"receptacle, the` other being' cgnncctodrzdirectly to on'eofwlhe l trackol'jseitviceurailsby the shunt-ceiductor 2215gggwlifich iucludes\ in"l itszcircuitr'ftle =`c0ils olv a frefor independent `contactingelectro- 125 magnetic.terminal 17,;ecnstit1'1ting the movable part of theI electiuipmagnetic switching i mechanism and a'rcsistaice-Coilf18 for red ueing. the curl'cn iiowiingl'thrdugh said coils,4`

the cores ofi said eleetroi'nagnetic,terminal be Ying conne .i

d ieri connected` directif7 tu the currenlfeedet or main 11. Dis apowerfhouse dynamo or gen-` erator constituting the source of currentsupi .ply andhaving itsjpposite poleslconnected '1" by; conductors 1 9fan-d1-20 directlyto the eurrent-feeder or mainlland one-of lthe track 'orffservice rails 1. w w-represent the wheels ofl'a tram-car, onei of the axles of whichis f connected by a conductor 24'with a controller indiated, Ahy a conductor 21-with v rent-collector or; trolley-shoe 16, Thetv'rin C, connected to an loperatingmotor M, 'vsaid controller being' connected'n turn, as before the, cur

f orfdouble,workingV conductors-4 f4 are .prefer`-` ablygdividedinto sections ofpredetermined lengths insulated from each other throughout theiritngthsand a their adjacent `@mit and each Aprovided with alfree or independent contacting electromagnetic terminal17,.incloscd' in a water-'tight'.switch-box or lcontact-recap# are thus'jcaused to'electrically connect the current feeder or mainfthronghthe 'cores thereof with l connected by bondwiresor conductors 13 with the Isectional working conductors, and hence supply current thereto and to the propeiling-motor on board the car` thronghy the current-collector or -trplley-shoe 16, said. ter-` minals being demagnetized as thecurrentcollector or trolley -v-shoe. leaves or departs from the corrcspondingsectional 'condfuit'ns.A

In Fig;v 3 is shown a construction similar lto that. illustratedin Fig. 2, with the exception that the contacting or working conductors 4 4 instead of being arranged' in duplicate pairs of equal lcngth,asshown\in Fig. 2, are so constructed that the left-hand set .is' subf stanti'all'y like the *corresponding set illustratedin Fig. 2, while the right-handset is composed of short contacting or working conductors 4 4, located at the opposite 'endsof the'ffirst-named sets and connected by a.' twop'art shunt-conductor 22 with the preliminary excitation or energizingcoils 'of the electro#V magnetic terminal,v resistance 18, and the n arran gementl e track or service rails 1. A secondenergizi. g l very much lower resistance is Wound in the same direction aroundthe poles of the magf netic terminal and one end thereof Vconlilected directly. to the core of themagnetic terminal 117, so that when saidterminal is lifted to its upper posit-ion `the second set of coils 23 aids the tirstlnamed coils in' vrmaintaining the 'terminalin ,its upper-or closed position, the en`= tire working current passing `through the coils 23,y as will be evident on inspection-of the drawings. 'The details of this structural I A ith relation to the electromag-v netic terminal will .be more' particularly poinvtedfont `in connection with the description of Figs. 1'2fto 14, inclusive. i

Astill iurther modified arrangement of circuit-sis illstratedin Fig. 4 of the drawings,

in whch the contacting or working conduc- Fig. 2 ofthe drawings. In Fig. 5 I have illustratedia still `further stationary armatures electrically t or magnetizingcoil 23 of tors4 4 are in the nature of ycontactingpns .or blocks locatedrin lpairs at'stated intervas,

the circuit connections vfrom 'said contacting or working co' duct'orsbein'g as before by.'

bond-wire. or conductor 1-3 tothe tops or covers 1,2`and vbyth'eshunts 22 15 tothe'coilsof the ele'ctloma'gnetic1 terminals 17 and vresiste" between the's'uccessive'pairs of contactingfor v" working'conductors/i 4,'the circuit arrinige-V ments otherwise being not substantially'.dif-V i ferentl from those disclosed in modified arrangement. of circuits in which connectionrwith,

only one s'et ofv contacting or workingl com'.

`ductors 4 4 is' utilized, saidkconductorsbeing y arranged in line with eachother and the cir` cuit connections such that as the'current-col-A lector or trolleylshoevl passes thereover the electromagnetic terminals will be actuated in succession.

excitation Aor magnetization of the contacting electromagnetiefterminal 17, they same con-,-

sisting of a storagelbatteryof the required voltage carried by the vehicle or car, togetherl with an utoma'ticlswitch, or magnetic blowout 27, 'of any well-known form, for 'discon- .necting the storage battery when the' working current from `the power-,house dynarnoorY IOO generatorD is restablished and operatively" connected through 'the.electromagneticterm'inals to the controller C and njiotoron board,... oftheca'r, the arrangement vof the snrfacecontact ,system shown 'in this gu're of the drawings not being ysubstantially 'dilerent yfrom thatv illustrated in Fig'. 5. Ipmake no claim,"howefverto this 'added feature, `and the same isonlyish'own in .the present injstance for the purpose iof'illustratinghow, if

desired, thercnrrent may be restored'r to the.

of-derailment of vthe car, suddenstoppnge of :the powerhouse-dynamo or generator aD, `or in any other manner. l, t 'n Referring'new` to Figs.,7,to 15inclusive, fork a detailed# description. of ,the switchboxes @contact-receptacles andthe inclos'ed entitc ting electromagnetic terminals and oirit\connectionS, r6 tepresentsn'the box or rei,

.ceptaclemade of any preferred material and adapted to'be secured, 3S alreadydescri'bcd in -coiiiectionwithFig 1 ofthe drawingm'to the cross-ties vby ,bolts l8, passingy thro h openings 42 in lugsor earsv 7, each bran h feeder 10 extending into its switch box o1" cont'actrt-iceptacleY through.atubular'pro-V jection, 9 and thoroughly insulated at that.

point.,` The upper edge of the boitiispref., groove or' recess 46,l

erably provided with a l electrom ,gn'eticterlninal whenlost by reason which may betfilledfwith asphal'tum orotller. A

insulating materaladapted to` effect-a watertight `joint, and the` iron, steel, or equivalent top or cover '12 is lprovided with ,aj ribL 48,

, 1 9 .'In Fig. 6 of the'drawings Ihave illustrated 4adapted to fit within'the groove when in po!" sition, said top or cover being secured to the box or receptacle .by bolts or in any preferred manner. At one side of the topvor cover-.and integral therewith is an extension4 49, in whiclris formed a' conical hole or opening adapted to receive a conicall metallic sleeve 51, the arrangement being such that when the end of the bond-wire or conductor 13 isplaced therein the parts may be securely wedged together in such manner as to` form a perfect conducting-joint. gNear the bottom of the box or, receptacle" is a ledge 33, extending yeither entirely around the inner surface thereofor formed in the faces of two of the' sides thereof, said ledge;v lbeing adapted to sustain a removable bottom or tray 25,' made, preferably, of yslate or creosoted Wood and constituting the support for lthe switching mechanism and its adjacent parts, there being in the box below this bottom or tray 25,

` when in position, a chamber 3-lof sufficient dimensions to inclose a resistance 1.8, adapted to furnish to the magnetizing-coils wound around the cores 76of the electromagnetic. terminaland connected directly in circuit with the shunti22 15, the desired quantity of current to'cause the terminal when excited or energized to move upward and establish contact with the interior surface of the top or cover 1,2, said top or coverv being in effect a stationary armature. The bipolar -mag netic cores 76 of the terminal are secured to "la magnetic yoke 68, which in turn is supvpo'rtedby bolts 32 32, passing through bolt-` holes 29 29 in two of the arms of afour-armed cross-bar 59, the other arms of which cross-Vv bar are secured directlyto the upper or free ends of the flexible bands or conductors 50i and folded Kback and forth in the vmanner shown in Figs, 7`and 15. The lower ends pf these iiecible bands or conductors G0 arcsecured directly to the inner endof thebranjqh feeder'll) by'a metallic clampf and boltsf28' 2S, which clamp in ft'urn rests directly upon the removable bottonior tray'25. The en` larged upper ends 7 S of' the magnetic core 7 Gf are rectangular in shapcfand piiesentllat surfaces ontheir upper sides. 75 nepresent's the contact-plate of the movable electromagnetic terminal, the same consisting, preferably, of a sheet of hard-rolled copper o i' other equivaient non-magnetic material `eoverin,f .1;v the upperfaces of the` rectangular-shaped enlarged ends 78 and slitted, as` shown, so as to present on' each side three or more yielding fingers.

, plate 75 are bentv upward,` as shown, and it (the plate) is frictionally4 connefcted w'ith'the bipolar cores ofthe electrom agne't by a flan ged cleat 77, the flanges of which fit snugly over the adjacent edges of the rectangular-shaped enlarged ends 78,the structure being such that when the parts are assembled there is snbstantially a tongue-'an'd-groovc connection be tween them. After the parts are thus assembled the ends of the flanges of the cleat are The outer ends of,this contactbent laterally around the cornersof the recianguiar-shaped enlarged ends 78, as shown at 79 '79,'.Fig. 10,v thus firmly uniting -them all together. l The cleat 77 and the contact-plate 75 are' each provided with a hole ropening,

and Ito Athe lower surface of the cleat 7 7` is se cured a guide-tube 80, said parts being arranged so as to receive the upper 4end .of a

brass or other non-magnetic guide pin or rod 56, secured to a supporting metallic base 55,

attached to the bottom or tray 25, which guiderod when in position extends upward through an opening 30 in the cross-bar 5,9 anda cor- -respondin g openingin `the yoke 6.8, the entire arrangement being such that the electromagnetic terminal is yieldingly connected'to the flexible bands or conductors and `adapted to move freely upward under the action of an exciting-current in the coils around the cor/es'y 7 6 and downward under the action of gravity,

the contact-plate making Velectrical connection withthe smooth under surface ofthe magneticy top ortcover 12, the same being in effect, as before stated, a 'stationary arma.-

ture. This contact-plateY 75 serves an especial function, in that itis of copper or equivalent non-magnetic material and therefore tends to overcome the action of any residual magnetism which may remain in the cores 7 6 by reason of the approximatelycompleted magnetic circuit between said cores and the stationayzarmature or cover 12 .when in the upper or closed position. This feature con 'stitntes an important part of the invention,

in that it assu-res the absolute separation of the movable terminal from the stationary ai'- lmature 12 after the cores have beenrdemagn'etized, tl1e plate 75 not only preventing the `action of said residualmagnetism, butactin'g also by reason of its resilient-yielding nature IOO to force the terminal away from the stationary armature.

In Figs. 11l and l2 yol" the drawings Ihave IIO shown amodiiied form ofthe contact-plate t 75, the same in this instance'beng in the natu re of a carbon plate of the'dislr'd thickness and of an area sufficient to cover the surface of the enlarged ends 7S,A said rplate being secured to the enlarged ends by a cleat 77 and two or more bolts 85,:located ou opposite sides "of the hole or'openingthrough-which the guide InFigs; 12 andl' is shown the added fea# tureof whatl term the feeder-coils, which Laie'adapted Lto aid` the shunt-coils inV holding'A the terminal in its upper or contacting position. These coilsare here illustrated by the number 23 and are .of much larger `current-` carrying capaeityftha'n arethe coils included in the shunt 22 1,5their function being to vconvey the working current around the coresj 76 in such manuel' as to insure 'complete mag.

netizationof the cores afterpontact has been? effected between the moyabie electromagnetic terminal and the stationary armature or cover -Said coils are ,connected at one end -by binding-bolts 66 to the 'free ends of the ilexible bands or conductors 60 and then wound in proper direction around the cores 76 to give to them the same polarity as was given them by the shunt-coils, the other endl of the coils 23 being connected by a binding, nut or bolt-,67 and clip 69 directly to the yoke 68 and hence to the 'cores 7 6. It will be noted, however, that the cross-bar 5,9 in this instance should either be entirely of insulating material, such as vegetable ber or the like, or that the yoke and cores should be normally insulatedfrom the flexible bands o'r conductors 60, it .being obvious that no current should pass through the cores vuntil after the preliminary excitation thereof by thejcoil ineluded in the shunt 22 15, as will be more particularly described with the description of the mode of operation on reference to Fig-3 of the drawings.

' Referring now to Fig. 2 for a correct 4understanding of the operation of the invention, it

` will be understood that the current-collector upon whichV the current-collector or trolley` shoe restsv.- In this diagrammatic view the' y firsty pair through the current-collector or or trolley-shoe 16 is supposed Ito be always in mechanical and electrical contact with any ypair or of two adjacent pairs of sectional contacting or working conductors 4 4 over which it is passing as the car advances' in' either di-q rection, so that normally 'all of the ,contacting electromagnetic terminals I7 are in their lower or disconnected positions, except such as may be receiving current through the coils thereof as the car passes overthem. Before startinga car from the power-house, therefore, or from any'other point when the current is lost or brokenl it is necessary to establishthe c'urrenty through the coils of sucvlifof the electro-v magnetic terminals 17 as may becon'nccted,l

with the sectional working conductors'4 4',

' car, which is supposed to'be passing from let` t to right, has carried the currentcollector or'` trolley-shoe l16 out of contact with the Afirst pairottwinlfcond-uc'tors44, audit now rests whollyl lupon the second pair, bridging the same,"current having been conveyed from the trolleyshoe andthe preliminary energizing: coilswof the electromagnetic 'terminal '17 by way` ofthe shunt 2,2 15, so that the working currentffrom the power-,house dynamo or generatorD now passes from the +,pol'e'ihereof by way of vthe conductor-19, current-"feeder or main 1'1, branch -feeder 10, flexible bands or conductors 60, cores of the electromagnetic terminal 17, the fingers of the copper contactplate 75, (see Figs. 7 and 8,) magnetic top or coverl 12 of the switch-box or contact-receptacle, bond-wire or conductor 13, ,right-hand twin working conductor 4, current-collector or trolley-shoe 16, conductor 21, controller C,`

electric motor M, conductor 24, right-hand wheel'w, track or service rail 1, by conductor 20 to the pole of the generator D, thusfurnishing the working current to the motor. A branch or shunt circuit is-formed at the same time from the current-collectoi'ortrollcyshoe way, the terminal now in contact with the sta# 75 .tionary armature or .cover 12 falling away from the same as t-he curren tcol1ector r trolley-shoe leaves thepair of twin working conductors-upon which it now rests. l 'xc' B y kthe arrangement illustrated in the dia- 8o. grammatic view, Fig.' 3, the` right-handsetv of `twin orcdouble workingconductors is'done .away with and contacting blocksA 4are arranged in pairs to supplant the same, this ar-A rangement being possible by. reason of the l action o little vfeeder-coils 23, as will now be.- explaihgA v,With this arrangementof circuit' connectins the current passes from-the l` pole of .the power-house dynamo or generator I D by the cli`rren't-feedc l"o'r` main 11, branchA 9o -feeder 1Q, Vflexible-bands or conductors 60 to'- the binding-bolts, (see-Figs. 12, 13, and 14,) through feeder-coils 23 to the binding-bolts-67, thence through theyoke 68, cores 76 ofthe bipolar magnet, contact-plate 7 5, stationary 95 armature or cover 12 ofthe box-or contact -rel ceptacle, by bond-wire or conductor 13 to the contacting-or workin g conductor 4," thence by the'currentlcollector or trolley-shoe 16, cono ductor 21, controller C, the motor M; conducxoo tor 24, left-hand wheel w, track orI service rail 1, and conductor 20'to the pole ofy Ihegen-4 p 'crater'.- A brahchcircuitis formed at the same time'through the'vcurrent-collector ortrcll'ey#I shoelQ 'the Contact-block 4, upon which the fc5 "trolley-shoe new `rests,'shuntr 2215, the p `re-'fA `li1ninary exciting-coils of theelectremagnetc I 1 terminal 17, 'resistance 18; right-hand track or' service-rail1,right=handwheel w, conductor 24, left-hand wheel w,l'e`ft.hand track or vservrre ice rail 1, 'and con'd actor-20 t-the generatingv sov that both coils are nowac'tin'g to hold thefe'rminal in its upper orcontacting' position with the stati.onary,armature' or cover`12, Owing to the fact that afterthe electromagnetic ter-A 1x5 minal 17 is once' movedto'its upper` position`^ and because all of the working current` passes through the feeder-coils 23 before it passes- `through thecores'of the magnetic terminal,

. said terminal will be held alwaysinits upper uo `In the arrangement shown in Figllothe'.'

65 shunt-vircuil'.y

operation will be understood in view of what has been said in connection with Figs. Zand 4 the only diiference in thc ci rcnit arrangement being as to the relation oi' the contacting or 5 working conductors "4 4 injthe road-bed, all.: of these'inodified' circuit arrangements ling disclosed for the purpose 'ofshowinghowiny novel form of independent*elcctromagncito terminal may be .utilized with yarious farlo rangements of working circuits 'andneircilit connections i v By the expression free fir/'independent contacting electromagnetic terminal lr'e'reinbefore used andV found -in the claims which .i l5 follow I wish to be ii'nderstood as meaning a Y contact-terminal in the nature otan'eiectiomagnet whichmoves bodily, freely, and independently through the agcncyof an ener-'- gizing or exciting current, passing through `zo colsadapted to magnetize the saine and in such mannerI that itwill assume its contacting position with a stationary contact when under the influence of such current and )will assume its normal or disconnected'position z5 with 4.r ation to the stationary c ont-act through the action of gravity when i the current' is discontinued, and I wish it understood that my claims are generic as to this feature;

nor do I limit myself to kthe especial vdetails 3o 0f construction hereinbefo're described with relation to other features of theinventioni such, forl instance, as the means'desc'ribed for overcoming the effect of residual magnetism in the'coresff the bipolar magnetic. terby discontinuance of the exciting or energizing current, and although I. have shown-two devices by, which this result may be attained I do not limit myself- `to those. specific strucaor tures, asll wish itto Abe understood f Ithat my claims in 'this respect are directed particulnrly to the combination of a free or inde'- pendent contacting electromagnetic terminal y provided with a preliminary means of exci- 4*-ta,tion0r magnetization carried'therycby to-` f gather-with an y equivalent means'for n ullif ying or varying the flfect of residualmagnet- .ism after the* .energizing-'current is discon#` tinued;

lHaving thus described my invention, what I claim, and. desire to secureby Let-tersI Pat-' ent of the United States', 1. A free oixindependent contacting electromagncticl-terlninail,` in combination with 55- 1neans carried thereby-for effecting the 'preliminary excitationor magnetization thereof.

2. Atrea or independent contacting elecL Vtromagnet the core of which constitutes the tcrminatot' a I'ccdcr-circuit, in combination ofwith means carried thereby for cliectingrthc excitation or lnagneti'ation' preliminary thereof;

3. `A free or. independent A'contacting cle-cw a coil included in a' tromagnct providral' with f y i, i tri-,c on unli-pc-.lnli-.nt contacting-cicctron-.,-ignidve terminal included'rliasliunt-circuit and adapted to be actuated in one direc- ,tion by a current iiowing through said shunt and' in `theother direction by gravitation. ,5. A free orindependent contacting electromagnetprovided with a magneti/ting-coil carried thereby, in combination with a resistance iu`(l1.u `tcd in a shunt-circuit between the fworking cond rotors and a track or servico rail.

,UA contacting device-or terminal for an elec riecircuitembodying an clectromagnet finbjliuledin a shunt between one or more incombination withan energizing-coil carried thereby and connected with one member of thcwork-ing conductor and a track or servi'ce rail.

J. A contact system ei |ibodying twin scctional working conductors; an armature connccted with oni,- mcmbcr thereof; a contacting clcctromagnct having circuit connections therewith', acoil connected with the other member of said conductors anda `track or service rail. t Y

l l0. A Contact system embodying twin working conductors; an armature connected with one member thereof; a contact-ing electromagnctlniving circuit connections therewith,

of said conductors; together with a resistance 'connected in circnit with said coil and with 'a track or service rail, all being so arranged as iocausc said--clcctromagnet to be lifted ergizlng-circuitisfclosed.

11. A contact system embodying sectional working conductors; an armature connectedwith one membc'rthcrcoi'; a contacting elec- 'tromagnet having circuit connections therewithg" af coil` upon said electromagnct conneeled 'with the other member ofy said Workingaconductoixand with the track or service rail and a cnrrcnt-collcctor or trolley-.shoe carried by thovchicle, said current-collector being adapted to bridgeor spangthe working coil in such manner as tolift the electromag- 'nct into contact with the armature and close thesnpply-ci rcnit through the other member of the workingr conductors.

1L. y A contacting device embodying a. contacting bipolar electromagnet, the cores of maintaining the elcctronmgnel. in contactA and acoil connected with the other member x x 5 into contact with the armature when the encond uctors and toclose the circuit through the

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