US901997A - Electric-railway system. - Google Patents

Description

IL F. SAPJSHMCJ,

ELECTRIC RAILWAY SYSTEM.

MPLIOATION mmm AUG. 19, 1904,

901,997, mamma. ma. 2f?, ma

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UiNiTED srniilnsv HR/MJF, F. PRSHALL, OFLONDON WALL, LONDON, ENGLAND, ASSIGNOR T() ('liii'iitL ELECTRIC GOMPAN Y, A C(')RPORATION Oi" NEW YORK.

ELECTRIC-RAILWAY sYsTEM.

Specification oi' Letters Patent.

:Patented ost. s?, iooo.

Anulfotion led ugust 19, 1904i. Serial No. 221,324.

way Systems, of which the following is iispecifioation. l

.My invention relates to electrical railway systems, employing a bare .conductor 'for ti'zinsniittingir `the `power from the source to the locomotive or train. In such systems it nmy `bel nooessory in `eertii'incoses for reasons of economy toiohoi'ge the conduct-or to o high tension which may he inconvenient to use along certain portions of the railway, suoli :is pssseiig'or stations, 'yards and under low bridges, where it becomes advisable to ln' suohsystsnis employing :i Conductor charged charge` the conductor nt n low tension;

tof il highy tensionI iiiid having sections which :tie'olnirgod tolti. low-tons1on it 1s necessary that ,the tension it1tlietoiininois ofthe ino-` to'r r.or` motors-on the loooinotivoor train sliollltll be the sinne whether the trriin is" takiliiiicnrrontfroin `thehigfh tension or low#` tension conductor except yfor the' comparse tively snnillwhiingostlue*to'the dro i `in the hat the' .operation h v `WhiOlirhs is effected should he" :tutonnit ic and should 'involve no more thon :i momentary intorrnntion of supphj to the motors. w l

ln ono oi its nspoots; iny invention consists in providing;r nutonnitic ineiins` foi cli/iiiigigirigfV tln,x coniiootionszoi. :t cui' mrrnitivlimi passing iront :iflowonsion to a liiightonsion section,

or. viceversa.

In iiA 'furtheri-fisnect, my `invention f ionik the. switch. when: tho :oar 'p iisses from one `sootiontoiinothor.- '4

More specificallyxoonsidered," my invention consists in placing` ing,r L condncton* Wliiehi are energized hv4 currents: diiloringfinfeliitritcteryin di'llrent 'positions.;relativeti f tinck, so y that Ithe colleot`y ing deviceron Athe om' is shifted in" pnssing" fr'mmm santiohto finothen sind in utilizing the Vsections oi' the Work'- this shifting motion to oporzito ii switch in the oor circuit.

My invention will oost he understood hy refereiieeto the accompanying drawings, in which v Figure l `shows diagramiinittioolly it trztnsmission lino comprising sections energized hy currents diiieiingin Qhoinoter ond arranged in neem-dance with nh invoi'ition; sind Fig'. shows diiigrnninnitioslly tho enr eiionits sind the nntoniotio Controlling ins/:ins there-iol,

In Fig. 1, C ropizesents ii ser carrying o. spring-pressed trolley-nim T, whioh i-shiim'n in engagement with the higlntnnsion sociion H of :i trolley-Wire. L irepifoseiits :i lonnit-nf sion section of :i troiieyswiie whioh sopin rated from zi high-tension sootion hi the fa-..... snoit dead section D. ino iii/glnteinsmii und 'loir-tension sections firs piaci-d. :it diii'oront `heights @here the timoh, so tinit iii missing' from ons to the other, the trolyyzirii1 bo lowered or raised. l toko adv n Y this movement of the trolleiniiii to ojiiointo the! devices for limiting; ther proper oii'onit "changes on the oar. Thus, in Fig. l hnve shown the trolley-iirni 'l opei'fitivoiy connect- ,odto :i pivoted bin* or lever li', theI opposite `ends of which are opiiativoiff Conni-etsii 'o two oilgswitohes it and t. The swim i.

shown in its closed pi'isitionv and the swioh .if in its open position, the troii y "i Ewing in on ,sagement with the iigh-tonsi closed from tioliey-`wire H through iroiie)-4 urin T, switch it, und primary ot 'rnnsioinioi' A, to earth. The. ssooiidziry of trnnf-i`oriiwr vA is nominated to tho motor iai, sind tho tiniis'ornioi is designed to reduci the voltage 'to tho wopor sinountini the nioior. JJhon `thev trolley-:nin 'l reaches the, point between high sind low-tension sections, it is depressed `sons to open the sWitvh/t hoi'oio leaving tho liiglntonsion section. 'lhe higintension oir ouit isfconsequentiy broken by the switch le', instead? of by trolley-min T leaving' the highteision' section. inthis waxy nroing" und de- Apreoiiition of the trolley-Wire ind troiiejvr Wheel nre avoided. Switch h is nrrsngod to open before. switch Z is olosed.' The hitter switch is not closed 'until iiftoi the troilovh 'firm Tihas pnssod the dond seo/tion i). :1nd has en teiod on the low-tension sont ion4 Tho opening of switoh h and tho dosing oi' s witohl opens the' primary 'oi' irons'oi'nni' und closes ny circuit from troiiepni'ni 'l dilos` lltl

l rectly through motor M, tok earth. The

' tion connection ma voltage of the low-tension, section is thus inipressed directly on the motor.

When the change isfrom high-tension alternating to low-tension direct-current, the solenoid S is provided, controlling a switch s arranged to open the circuit of the secondary of' transformer A. When .switch h is open, denergizing transformer A, solenoid S is deenergized and opens the switch s. This prevents damage to the transformer, due to ow of direct-current through its secondary when switch l is closed. When changing from high-tension to low-tension alternatingy current, it is not necessary to employ the automatic switch s. y A

In order to avoid-a continual small movement of the switches h and l, due to the usual Vand unavoidable variation in the 'height of different portions of the same section of a trolley wire, the bar Bv is connected to switches h and Z- through a-lost-motion'connection which gives sufficient play to the trolley-arm to enable itto follow the ordinar I variations in height in the trolley-wire wit outfmoving the-switches. This lost mo take various forms as, for instance, the en s of the bar B may play between separated shoulders or sto s h* and h2 and Z1 and Z2 secured to the .Inova le members of switches h and Z, respectively. In the position'illustrated in Fig. 2, the trolley is in itsV extreme high position, and one end of the arm B is in engagement with the lower shoulder orv stop h1 of the switch h. At points where the trolleywire is depressed slightly, the bar B is free to oscillate from the shoulder or stop h1 to the shoulder o rstcp 7b2 without affecting the switch. The distance between the shoulders or stops .t and h2 and similarly between l .and Z2 is such that ordinary irregularities in the height of the trolley I wire do not affect the switches.

Although I have lshown the switching devices on the car operated by a trolley-arm and over-head wire, it will be understood that my invention is not limited to thisv particular arranffement.- The switching devices may obviously be operated from a collectorshoe traveling on a third rail which has its sections arranged at diiferentheights above the ground, or at different distances from the car. Moreover, the meansior operating the switches may be wholly independent of the current-collecting devices. Any suitable operative connection may be em loyed between thc movable member and tiie'switches in place of the direct mechanical connection shown. Consequently,`I aim in the append-y ed claims to co'ver any suitable means for operating a movable member on a car at the' entrance to a section energized. by current of a diil'erent character, together with means for utilizing the movement of said member for producing a change in the car circuits.

moving the switch from one position to ari--A other when the collecting'device passes from one section of conductor to another.

2. In an electric railway systcnna conductorhaving sections ener ized by vcurrents differing in character, sai sections being arranged at different heights above the track, a

car, circuits thereon,` a trolley carried by the car and adapted to engage said conductor,- and means on the car operated by the trolley for changing the connections of the car circuits when the trolley tion of conductor to another.

3. In an electric railway s stem, a conductor adapted to be engaged' y a moving car and comprising sections energized by evi-fs rents diflering incharacter, a car, circuits thereon, a movable member carried by the car, means stationed at a point between said sections for engaging and moving said member, a switch on the car adapted to change the connections of the car circuits, and operative connections between said switch and said member.

4. In an electric railway system, a working conductor having sections energized by currents differing in character, a car, circuits thereon, a collecting device carried by the.

car' and ada ted to en age said conductor, the said sections being ifierently positioned relatigely'to the track so that said collecting device issh'ift'd'in passing from one section to another and means operated by the shifting of said device for changing the circuit connections on the car.

5. In an electric railway system, a working conductor' comprisin sections energized lby currents differing in c positioned relativelyf, the track, a car, circuits thereon, a collecting device carried by the car and adapted to be shifted in passing from one section to another, aswitch adapted to change the connections of thc car circuits, and operative connections between said device and said switch.

In an electric railway system, a trolleywi comprising sections energized by currentsA varying in character and suspended at different heights above the track, a car, circuits thereon, a spring-pressed trolley-arm carried bythe car adapted to engage said conductor and to be raised and lowered in passing from one section to another, a switch adapt-ed to change the connections of the car passes from one secaracter and differently lit ,transformer and to connect the motors dil-"- circuits, and operative connections between said arm and said switch` 7. In anelectric railway system, a conduc tor having/sections energized by currents dil'jtering in character, a car, a motor-circuit thereon a'collecting device carried by the car and adapted to engage said conductor, a transformer havingits primaryI connected to saidl device and its secondary to the motorcircuit of the car, switches, adapted to open the circuit of said transfornier'and to connect the motor-circuit directly to the collecting device, and ineans'stationed at a point between said sections for operating said switches.

'8. In an electric railway,l a working conductor comprising sections energized by currents differing in character and diierently positioned relatively to the track, a car, a motor-circuit thereon a collectingr device car ried by the car and adapted to engage said conductor and to be shifted in position in passing from one section to another,` a transformer having its primary connected to said collecting lejvire and its secondary connected to the motor circuit on the car, switches adapted to `open the circuit of said rectly to the collecting device, and operativ? connect-ions between said switches and. said device, wherebysaid switches are operated when said device is shifted in position.

9. In an electric railway system, a conducrents diileri'ng in character, a car, circuits thereon, a movable member` carried by the car, means stationed at a point between said sections for engaging and moving said mens ber, switches on the car arranged to estab lish ditierent connections of thecar circuits, and operative connections between said switches and said member, the operating 'means for said member and the connections between said member and said 'switches be ing arranged to open one of said switches before the car leaves one of said sections and to close the second switch after the car reaches the second section.

ing conductor comprising sections energized by currents differing in character and d1ii'erently positionedrelativeiy to the track, a car7 circuits thereon, a collecting device carried by the car and adapted to be shifted in passing from one section to another, a switch adapted to change the connections of the car circuits, and operative connections between said device and said switch, said. connections comprising a lost-motion connection adapted to permit a certain amount of play of said collecting devieeiwithout moving said switch. II witness whereof I have hereunto set my hand this eighth day of AugustflQOLi. y -HORACE F. PARSHALL, Witnesses: R. Wnsrncorr,

tor adapted to beh engaged by a `moving car FREDK L. Rani). i

and comprising sections energized by iciir- 10. In an electric railway system, a work-

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