Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS1302345 A
Publication typeGrant
Publication dateApr 29, 1919
Filing dateJul 10, 1914
Priority dateJul 10, 1914
Publication numberUS 1302345 A, US 1302345A, US-A-1302345, US1302345 A, US1302345A
InventorsGeorge P Finnigan
Original AssigneeGeorge P Finnigan
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
System of train control.
US 1302345 A
Images(3)
Previous page
Next page
Description  (OCR text may contain errors)

0u. mu., Own, H 2M LA H Ps T An Y, ma Q a K, WHW Rl l Mmm, www MNM NMD J IRE ,F.TH.. CIF PON I nv GMU vlA Sm VI..L SDI P A G. P.y HNNIGAN.

SYSTEM 0F TRAIN CONTROL.-

I Patented Apr. 29,1919

APPLKIATION FILED JULY 10.1914.

a SHEETS-simi a.

SQ` .am an, a Qawm IZW. ru m Q mr C d AToRNzY `ditle'rent or varying peet GEORGE P. FINNIGAN, 0F WILTON-ON-JAMES, NEAR RICHMOND, VIRGINIA.

SYSTEM 0F TRAIN CONTILOL.`

Specification of Letters Patent.

Patented Apr. 29, 1919..

Application filed July 10, 1914. Serial No. 850,075.

To (LM whom it may conociera a citizen of the Ul'iited States, 'residing at `Wilton-onJannes, near 'Riclmu'auh Henrico county, State of Virginia, have invented certain ne f and `useful Irnprovcments in Systems of Train Control, of which the following` is a. specification.

`My invent ion relates to a system of and al'iparatus for controlling: the speed of or giving: il'ulications or signals upon a moving,r vehicle of any charactlu, but more commonl.Y an .trie or steam railway car or train; and my invention'resides more par ticularly in such. systen'x or apparatus which shall prcaluce different controls or give different indications or sign: s in response to ot' the vehicle, car or train; or which shall produce tapering or 'varying controls or indicatiolis on the car or train as 1t proceeds, so that traffic may be expedited by employing cars or trains followingt each other at very sliolt intervals To these ends I employ permanent magnets or electri'i-magnets. `or "simple uvunagnetized .nulmbers of magnetzaliile material, or combinatons of them disposed inthe vehicles patl1`ir1.sl1ch manner as to in'Hucnce a circuit or circuits on the vehicle by ii'iductvc effects resulting from (.:hanges of magnetic flux tl'ufezulingJ winding' or circuit carried bythe vehicle.

And my invention resides system where controls, indications or signals are effected both upon `the moving vehicle and upon instrumentalities located along its path of travel, the eil'ect produced by tlledevices alongI itsl path ot' travel being mutual, or lacing solely upon al device upon the vehicle or lsolely upon a stationary device, as on a pe. nanent way.

4And my invention :resides also in a system wherein controls, "n'uiitaitions or signals are efit ted by instrlunentalities along the permanent way i11res[un'1se to vehicle or train nimfeu'ient without any circuit or special device upon the vehicle mmtrain, other than some magnetizahle material. which may change the liux' o't'y a peu'mal'ient or electra magnet di posed in the path ot' travel, such magnet able material geni-rally being the car wheel or Wheels, or the car wheels and axles.

For an illustration of several of the many also in such a forms n'lyinvention may take reference is to 55 1 l Be 1t known that l, (l-nouen l. I* INNIGAN,

flux `is made different at` different times in response" to the condition of some track circuit or any other circuit.

Fig. 2 is a diagrammatic View of apparatus and circuits whereby there is selective or varying response to varying" vehicle or` train speeds by means on a car or train yinfluenced by means producing magnetic fluX'70 or a magnetizable member uponthe permanent way.

Fig. 3 is a diagram ofapparatus and circuits for et'ectin controls, indications or signals, which may be selective in response to varying vehicle speeds,` the stationary apy paratus along the permanent way comprising magnetic means disposed near a contact conductor from which power is delivered to the car or train.

F in'. -'l is a diagrainof circuits and a simpliiied perspective view of a selective translating device. l, l

Fig. is a diagram of apparatus and cn".x

cuits involving an electro-magnet disposed .vices on car or moving vehicle `and devices upon thetracltway, or upon either alone.

lFig. 6 is a diagrammatic view of appa- 90- ratus and circuits whereby, With the employment` of pcrmai'i'ent magnets of diiferent flux values along the pat-h offtravel, track circuits are employed forv producing indications-or controls upon tliecai' or train or, by 95 devices along:A the trackway. y 'Fig'. 7 a diagrammatic view of appa'-y ratus and circuits resembling those of Fim (i but elnploying an electro-magnet along the path of' travel of the carv or train. 100 Fig. 8 is a ('liagrammatic Viewv of ratus or circuits, involving track circuits, for procuring variable or tapering controls or indications or signals upon lthey moving car or t'aln. f 'i Fig.' t) is a diagrammatic view appa.- ratus and circuits whereby efectsare `produced upon control, indicating or signal: de-

losy

vices disposed along the trackway, without recourse to circuits or devices upon the car or train.

Fig. illustrates a'modied form of er- 'manent magnet or magnetizable mem er.

'netizable material upon which travel the wheels W, W and axle A., also of iron or steel or of other magnetizable material. Car- ;ied by the car or train of which the wheels and axle are a part are the wheel coils C, C lo osely surrounding the wheels and disposed parallel to the rails between the axle and the rails. l O'r an aXle coil like C, of Fig. 2 may be used instead of or cumnlatively with wheel coils C, C. These coils, ruhen more than one is used, are so wound or so connected that the electro-motive forces produced therein are dumulative, the coils .C, C being connected in circuit'with the battery or other source of current B and the translatingdcvice t, which may be of any suitable or desired type for giving or controlling various indications or controlling the speed of the vehicle as by control ling the air or other brakes or controlling the engine ormotof; it is yhere assumed, by way of example only, as of the character shown n Fig. 4. In this circuit may be inserted an adjustable resistance R1 all or moreor less of which may be cut ou(` Disposed in the ballast or trackway is a permanent magnet P, in the form of a bar or plurality of bars or plates whose one magnetic pole is beneath or near one rail "l" while its other magnetic pole is near ozheneath the other rail T. Between the poles of the permanent magnet P and the rails T, T are disposed magnetizable cores c, c preferably of soft iron or of other similar magnetizablc material, connections of low magnetic reluctance Z being made between the cores c, c and the rails T, T; and between these coros and the poles'of the permanent magnet P a low magnetic reluctance connection is providede If the rails T, T are used in a track circuit insulation I .may intervene lo prevent a short circuit between the rails T, T through the permanent magf net P. Surrounding the cores c, c are the electrp-magnet windings fw, ci) so wound or connected as to be cumulative in their eifept, these windings fw, lw being connected in circuit with the battery or. other source of current B1 and the 'variable resistance R more or less of which is short circuited by the movable Contact a mechanically connected to the core of a solenoid s or any other electro-magnetic device or translating device, the terminals of the winding of the solenoid s being shown as connected-l to the conductors l and 2 of a track circuit (as shown for example in Figs. G and 7 or any other signal or control circuitf" The upward movement ofthe Contact a is opposed by .companied by magnetic flux in the coils'C,

C, producing an electro-motive force superimposing a current upon the current produced in the car circuit by the battery B with the result that the magnetism of the translating device t will at some moment bev changed to a degree to effect a control or an indication or signal.

The direction of the current through the windings w, w from battery B1 issuch that they produce magneto-motive force oppos- ,ing the magneto-motive force of the permanent magnet P so that when these windings w, 'w are energized, they produce with the permanent magnet P a flux through coils C, C which is lessthan that produced by the permanent magnet P when these windings are not energized. In consequence` the amount of flux passing through the wheel coils C, C will depend upon the current strength in the circuit of the windings w, fw and this is varied by the adjustment of the amount of resistance R in the circuit of the battery B1. And this in tiirn is accomplished by the solenoid s which when strongly energized will raise the contact a and cut resistance out of circuit and when the current through the winding of the solenoid .s is diminished the spring su will move the contact a downwardly to such point that the force exerted by the spring is balancedv lating device t in the circuit of the battery B. In4 consequence the response of the translating device t will depend upon the condition of the circuit including the conductors 1 and 2. These conductors 1 and 2 may be in circuit with a source of current, as in a track circuit (as shown for example in Figs.

6 and ,7) or any other circuit controlledin' any desired way. f

It will be understood that the device t will. respond m varylng degrees to varying car l speed even when the member P and the asso ciated track devices described are omitted and a simple magnetiza'ble bar of soft iron or steel or the like extends across. the trackf way, for in such case the magnetic reluctance of the magnetic circuit on the car comprising wheels W, W and axle A will change as the car `fluctuatlons of di'erent. intensities for dit ferentrar speeds in the" car circuit.

In; Fig. there isassociated with the rails T, T the preferably laminated bar or mass M of split iron ior'steel or similar magnetiaL able material, such as Russian iron, it being understood the bar M may be magnetized permanently as by coil traversed by current.

i Between the ends of the bar M and the rails T,=T may be disl'iosedsoft iron or soft steel oaf'f'similar.cores'c. c; insulation I being provided .it` necessary. Surrounding these cores c, c, are the coils or windings wi, w connected cumulatively with each other in a cir-y cuit including the battery or other source of current B2, adjustable resistance Riz and the winding w1' of a translating device t1 of any suitable 'ytype,rbut here illustrated as comprising a permanent magnet p having a soft iron or steel or similar'pole c1 surrounded` by the `whirling w1. Coperating with the pole @L are reed or other armatures or tongues el and c, which may themselves `be pern'ninently magnetized, or may be in any other suitable magnetic or magnetizable condition. vThe armatures a1 and a2 are normallyil retracted, as by their own spring effects, against the hack stops .s1 and are adaptedfto engage respectively, when at tracted with iflicient Kforce, the contacts c2 and 0:, connectedr ypectively withone terminal ofthe solenoid windings sf and `.93 whose other terminals are connected ptogether and with one terminal of'batteryor other source of current B3 whose other terminal `(.:cmnects with both of the ari'nature members u, and (1,2. The solenoid core c4 is common to the coilsl s2 and s3 and carries at its lower endv a valve 'u having a port p1, the

valve fr: in 'its- `clues `"connection 'betiveen the passages pz andfpyin which is adapted to move a motive fil`1id,`s|1ch as steam, compressed air, or any othermedium under pressure which Inay be eml'dbyed to effect any control, or indication or grml, )r the solenoid c4 may be yemploye l to adjust or vary the resistancein an "elec `ric""circuit or to effect a ny other adjustment orchange for purposes of varying control, indication or signal hy devices along y"the trackway.A Around the axle A of the car may be disused a coil or winding C1 (or Wheel coilsI as 1 may be used instead of or cumnlajutalple resistance-R1, all of which or dxtlessof which may be cut outof or circuit` .which includes besides a n "directx leurent or battery B4 and a "source of'l alternatin current A'l" controlled "respectively b yswitc les s" and'sn. Thiscircuit may also'include if` desired a translat4 66 ylling device `t of anysuitable or desired type,

asses the liar with resultant current vr,closed position, illustrated,

ith coil (ll) connected in circuit with and may be, for example, a translating device similar to t, or of the character illus-y trated in Fig. l.

lhen the switch .si4 is closed, andi the switch er, is open, the source Bl* only will be in circuit on the car. A direct current, whose strength may be adjusted by resistance RL, will How through the coil C, `1navg netizing the axle A and the wheels lV, lV, the wheels being ot' opposite pola rities.

y In such case, a car passing over the bar M causes a change in the magnetic fiux through the coils w, yw which changewis effected or controlled or modified by the magnetic fluit produced by the coil C1. This change in magnetic fluxthrough the coils w. fw cau. the production ot' a current by induction, in the circuit of these coils thus changing the attractive force normally exerted by the core c'1 upon the reeds or armatures el, e2. For a given speedof car or train this change in attraction willbe of predetermined amount and may be assumed to loe sutiicient to attract armature (L, which may Ibe moved so close to or into contact with the pole c] as to be retained in attracted position and thereby close and hold closed the circuit from battery B: and armature (1,1, contact c2 and solenoid winding s2, it being assumed that the current impulse vasnot sutlicient to attract the armature e.. The wind-ing s, now being energized will attract the core c4 upwardly a certain distance `in opposition'to spring 86 tl'iereby opening the valve somewhat and Vthe ci'irrent impulse ingthe circuit of the winding wl will loe greater than before and sufficient to attract both armatures (LL and 11,2 and hold them in their circuit closing positionsgor it the armature a1 had previously been attracted and held in circuit closing position a succeeding train might pass at such higher speed as to cause the subsequent attraction and holding of ari'nature apto. close `the secoml circuit. In either case, both circuits arc closed and therefore both windf i'ngs s: and s3 are energized with resultant stronger pull upon core c4 whichwill rise to a greater distance in opposition to spring a, and open the valve 'u still farther to cause a `Heater (le-:gleeof control or indication or trolled or operated to different degreescorresponding withwlifl'erentdegrees of train f speed. i

In case the switch s, is open and 8 is closed, alternating current will pass through the axle coil C1.

or soft steel.

And it will be further understood that in any of the above cases the source B2 may be omitted, but in such case there is likely to be less delicacy and certainty of action, as later explained in connection with Fig. 4. When the translating device t is employed in the arrangement of Fig. 2,it also will respond upon passage of the car over` bar M and produce any suitable control, indication or signal upon the train or car. And it will respond when the bar "M is magnetized, either permanently or by a winding tra.- versed by current, and also in the case where the bar M is simply a mass of softiron or steel or like material.

In Fig. 3 thereis shownan arrangementwhereby results similar to -those described in connection With Figs. 1 and 2 may be procured in connection with an electric railway receiving its. motive power from atrollcy wire, third rail or other contact .conductor.

The contact conductor illustrated in this case is a trolley or overhead conductor c, carried by the insulator I1 supported by the usual span wire wz. In definite relation with the conductor c5 is secured the )ermanent magnet P1 which may be suita ly insulated from the conductor 0,. The permanent magnet may have the .soft iron or soft steel or-similar pole cores 0 surrounded by windings w3 adapted to be connected in circuit with either a direct current source B5 or alternating current generator A2 brought into circuit respectively by the switches s, and 88. In the circuitmay be a translating device t of any suitable character, for example, such as above described.

Carried by the moving vehicle is the traveling contact or trolley wheel w13 contacting With the conductor c5 in the well-known manner'. The wheel w1, may be carried by a trolley pole or other member p, which carries also the core c., adapted to pass be-` tween the cores c6, au as the electric car or train passes the permanent magnet P1. On the core c, is the winding fw, connected in circuit with a source of current as a battery B and a translating device t of any suitable type, such, for example, as above described.

In this case the operation is similar to those described in connection with Figs. 1 and 2. f i

Where the control or indication to be effected is that of'some device along the track- Way, the winding w4 and its circuit on the -car may be omitted, and then, when thecore c, is either a permanent magnet or soft iron or soft steel, indications or controls will nevertheless be effected by the device t in any circuit with the windings w3. And in such case also the magnet'Plneed not be ai.

permanent magnet but maybe of soft iron But when indications or controls are to be effected only upon the car,th'e

thestrengt resistance R1 and of such direction as to 180i'- coils w3 and their circuit may be omitted and the permanent magnet P1 will eiect indications on the car. Or the parts may remain as shown and described and the translating device t in the circuit of the windings w3 may be omitted. Or the magnet Pl may be of soft iron or steel either with or without the associated circuit including coils w3' Ain which case indications or controls .will be produced on the car both Whenc1 7 5 i is a permanent magnet or also when it is soft iron or soft steel, it being understood that any arrangement may be used which will change the magnetic flux through a.

circuit either upon the car, or stationary` 30. -r

along the trackway, or both. --r

In F'g. 4 is shown an arrangement which may be used either upon the car or train or. disposed permanently along the trackf posed close to one4 pole of its coperating 95' permanent magnet. The free ends of 'the reeds or armatures are disposed at different distances from the -pole cores es, c, and om' surrounded by the coils or windings i115, (we

and w, respectively, these windings being .10er

shown connected in series With'each .other and with the battery orother source of current B, adjustable resistance R1 and the windings w8, 'ws which may be either wheel coils like C, C, Figs. 1, 6, 8, 10 and 11,- or an 105 axle coil like C1, Figs. 2, 5 and 7, on a movi-1 ingcar or train, or whichmay be stationary coils located along the trackway, like coils w, w, Figs. 1, 2 and 9 or C2, Fig. 5. In any event they are cumulatively onnectedandllo y arethe coils within which occur the mag` netic. fiux changes due tocar or train movements. The reeds or armatures, which ma themselves be springy or resilient, or whic may be supplied with springs, are normallyfll against their back stops s1- but when fullyf'fat".l

tracted come into and are held by the"per" manent magnetism in engagement with -the contacts en, 012, and cu respectively, controling the circuits of solenoids 8 am and ail, a 120 y battery or other source of current B, being included in circuit. Common to these solenoid windings is the core c, carrying valve 'u' having port p'the valve controlling passa and p, a's de- 125 scribed in connection with g1g .The pole windings 0.0- w, and' w., 'ard .l l I traversed b current from the sour B1, the

of current being adjustable by` 'amounts permanent magnet oppose the permanent magnets with which they are associated. thusnornndly preventing the permanent magnets from attracting their respective reeds or arnmtures. l-lowever an impulse comprising both positive and negative half waves being generated in or b v the coils wf, such current also traverses the pole windings but the. connections may be such that thetrst halt' wave is in the same direction with or assists the source BT while the second half opposes it, overcoming it more or less completely, thus allowing the permanent magnet 795, for example. to attract and hold its reed or armature o5 which may be itself permanently polarized only by the effect of the associated permanent magnet p5.

There being greater air gaps between the other reeds and armatures and their associated poles it will take progressively stronger impulses to cause their attractitm to circuit closing position from hich it will be understood that with impulses from coils ics, 'w ot progressively incre-.wing strength the different reeds or armatures. will be attracted and held in attracted position, thus producing a device which is selgetivcly re sponsive to varying speeds of Atrains or lars. As described in connection with lFig. 2, with more and more of the solenoid windings energized the valve@I will be lifted to greater and greater distances in opposition to spring so allowing greater and greater of motive fluid to pass through passages 772 and 71,., to e'ect arying controls, as of air brakes, or indications or signals depending upon the speed of the car. or trai.

It `will be understood also that the air gaps between the reeds or armatures or poles may be made of the same lengths but the windings wm auf and 'w1 may have progressively less turns so that it will nevertheless require. progressively stronger impulses to attract. the successive reeds or armatures. It will be understood als'o that with different air gaps as illustrattah', a single winding may embrace or inclose all the iolcs. i

While I prefer using a sourceof current such'as BT the same may be omitted, in which case.1 the connections may be such that the first half of an impulse from the coils wm j fw), will opposethe permanent magnet. and release any reed or armature that has held by it, andthe last halfwill as istuthe to produce attraction of In such case there is normally no current through the windings 1cm w and .u with the result that the. air `gaps lmtween the reeds or armatures and their poles must be more carefully adjusted and @there will not be the same certainty otl action as in thc'case where" the source B7 is present` And' further witlrthe source BT present any breakin its circuit Will result the reeds or arniatures.

been

in the att action ot' one or more ot' the armatures so that such failure is in the direction of giving a control or indication or signal on the side ot' safety. j

In Fig. 5 there is shown what may be considered a reversal of the arrangement shown in Fig. 2. Here the translating device t., batterjv or source B2 and adjustable resistance R2 may be disposed upon the car in circuit with the axle coil Cl while any suitable translating device l' is connected in circuit with the winding or coil C2 and with either the source Bi or alternator Al and adjustable resistance RL permanently disposed along the. tracltway. In this case the coil C2 wound upon the member M which may be permanently magnetizeil or which n1a \r be ot' sott iron or'sot't steel. Ur the circuit including the translating device it permanently along` the. traeltway may be entirely omitted and the member M may be either permanently magnetized, or magnctizcd by a solenoid and source of current, or may be simply a bar oi soft iron or steel, in any'ot' which cases the translation device f1 on the car will make. responses correspond ing to. those, described in connection with Figs. 1 and 2. and such translating device through itsl reeds or arnnlture members may ctlect any control, indication orsignal upon the. train.

ln Fig. the track rails T, T have inserted at suitable intervals, to constitute blocks, the

insulation 1 so that the. rails may be. madeparts ot' track circuits to the end that the wheelsl and axles otl a car or train may cause short circuit between the rails to eliect certain controls or results. lliere four blocks are Ishown, l)` E. F,` and (i, only the right end ot' block Dibeing shown and only the. left end of block (l beingr shown. The direction ot' travel of 'ars or trains is thatindicated by the, arrow. Thus at'or near thel end4 of the block D'and before the beginning of block E there is disposed across the rails. similarly to the arrangement above described, a permanent magnet. l), which is prevented from short-circuiting the rails by insulation I.

rIhis magnet has the vole. coils 'c o connected a: u y

with the contact r1,.'w.hich maintains contact v with tho contact a., actuated by the, core .on ot' the solenoid x, and the. contact. nl.. 4is adapt.-

cd to bring into circuit different. amounts ot resista nce. R, or to cut the` same entirely out ot' circuit., by `engaging the contacts (17,0, u. and rtw, the. track circuit including also the coil or winding'u= whose other terminal connects tothe other trat-lt. rail 'l` of the block D. 'llhe other blocks are.v similarly equipped andi the. traclt circuitof each ot' the blocks includes at the entrance to eachblock thesolenoid s thc terminals of whose windings are connected by conductors l and 2 to the two rails of the track circuit. By way of exam.n ple I have here illustrated a car circuit coin-Y prising source of energy l): and any suitable translatingdevice t associated with. a coil C suitably disposed with respect tothe wheels W and the axle A, but it will be understood that any of the arrangements herein de* scribed may be employed, particularly one which coperates with a translating device which will give varying degrees of response for giving varying controls, indications or signals, with different train speeds.

As the car or train is about to leave a block, its trai'islating device, due to the effect of the permanent magnet, responds to give a control or indication or signal wl'iich it will be seen will depend upon the condition of the block or blocks in advance.

lith a car in the block Cr, as indicated, the two rails T., T of that block are short circuit-ed through the wheeis and axle with 'the result that the solenoid s at the entrance to block G rohbed of current and the spring I, has moved the Contact (n, on to the lowest contact (L12. This cuts all of the resistance R into trackcircuit of block F thus weakeningr the current in the winding wf, to such degree that the signal Sg moves by gravity or otherwise into danger position, thus indicating that the lblock G is occupied.

It will be understood that the windings w, are those of relays or anyother devices tor controlling positions of signals in wellknown manner. The 4current through the coilsc, c at the poles of permanent magnet P at' the right end of block F has also been weakened, and, it being ren'leinbered that these windings produce magneto-motiveforce in opposition to that of the permanent I magnet P, their opposing magneto-motive".fry force will now be least with the result that a following car passing over this permanent magnet P at the right end. of block F will have produced in its car circuit a very strong impulse which, as hereinbefore described,

gages contact an leaving part of resistance will produce a selective indication or control depending upon the strength of such impulse, 'Such impulse may produce an audible or Avisual signal or may cause the wide opening of the valve v, as by an arrangement such as-shown inFig. 5, taken in connection with Fig. 4, as to powerfully set the air brakes on the train, either to bring the same to rest or to greatly retard the same, assuming that the driver did not see or disobeyed the signal Sg, i

This weakening of the current in the track circuit of block F also causes the weakening of the solenoid s so that the Contact a, en-

in the track circuit of block E, thus caus' magnet P at the end of block D to be still more strongly opposed and tocause the signal Se at the entrance to block E to go tothe safety position. And this will insure a siniilar condition in all the blocks to the rear which are unoccupied.

lt will thus he that as a car or train advances it produces a change in the track circuit in the rear-to give various signals and it will also change the opposition to the permanent magnets at the ends of the blocks to the rear so as to give varying in.-

, dications or controls upon following trains.

As the car or train moves olf the right end of block G the signal Sg will take the caution position and the contact en, will engage contact al, at the entrance to block G with the result that signal Sf will go t0 the safety position and all the resistance R at the enat 'any other point where an additional indication. or control is to be effected upon vthe car, the amount of flux .produced by such magnet may be made-anything desired to produ the desired nidi-cation o r control uponA the train. v0r where the train circuit includes a source-of energy, the member I2. vneed not be a permanent magnetbut may be simply soft' iron or steel` n. Fig. 7 the parts are similar to thosedescribed in connection with Fig. 6 except' however that in place of permanent magnets soft iron or soft steel. bars M may be emi ployed and surrounded by an energizing winding w10 connected c, c in Figffll.

Inasmuch as a flux through the wheel or axle coil C, upon a car or train increases with the increase of current strength in the coils wlo, (this being opposite tothe case of increase of currentin coils' 0,0 of Fig. 6) the resistance R and its contacts are so arranged that greater amounts of Iresistance are'brought into the track circuits as the `solenoid core. c1, rises, that is, as the solenoids s ing' the signal 'Sf at entrancegtgplockl to case-.the relay' br other C19-Vicent in place 'of the coils `saine being simply,as

with. the strongest current therethrough -the associated signal takes the danger position and the caution and clear positions are taken` with currents of progressively smaller values. l

Here again at the aifiproach to a curve or at any other suitable oint a member I which may be permanent y magnetized or. may be of soft iron or steel may be placed across the track rails to give an independent indicatibn or controlupon he car or train, the the case of Fig. 6, to cause a change in ux in the coil *in the car circuit as the train passes.

In Fig. 8 there are again shown a plurality of blocks or sections D, E, F and` G. In the example illustrated the upper or one rail '.l` iseonductively continuous while the other,

the. lower rail T, is divided into lengths corresponding with the blocks or sections by the insulators 1,. Between the two rails T.,T of each block and at one end of each block connected the track circuit battery or other suitable source of current B9, and

if desired an adjustable resistance R3 may be included therewith. And across the track rails T, T of each section or block, but at the opposite end from the battery Bm is connected the winding of any suitable relay R4, such as a well known track relay or any dthei equivalent. device, which; inay ialso control tracltway signals. as in Figs. (i and i',

`having the tongue or armature a1, pivoted atfrim1 and electrically 'connectedwith lone terminal of the battery or other suitable source of current Bm whose, other terminal connects with the upper continuous rail T.v

it bci-ug `noted that thc terminals or poles ot' like siens or )olarities of B. and B are zl a ii aci-oss the 'rails as hereinliefoi'e described i and aille insulated from' the rail atfone end at least by the insulation I. The coils 10 all have substantially equal number ot, convolutions or turns, and they act, when current pas through them, to opp( e the. magneto-motive forces of their associated permanent magnets so that the magnetic flux through the wheel or axle coils carried by the train or car shall ybe mfl, or at least `of such small value as to have no effect upon the translating device t upon the car or' train. And there may be a connection .windings 40 and thence through `the confrom each relay contact am through the coils 1cm, disposed upon the same permanent..

' magnets, to the continuous `rail or conductor T through the aforementioned lconductor om. It will be noted that `the number o f turns or convolutions in the coils w1, on the dilferent. permanent magnets varies, the number of turns in these coils decreasing from left to right, that is, )referably in the direction of the tratiic. ien current asses through these coils w15 they also op se `the mag-- neto-motive forces of their associated permanent magnets, but they do this ,to varying or different degrees because` of their different numbers of turns or convolutions. And it preferred that the number of turns iny the coil icm upon the permanent inagnet'P, this coil having the maximum number ot' turns ot' all the coils ww shall be than the number of turns in each of the coils Vwwso that in any case the magnetomotive `force ofthe permanent magnet P, shall not he completely diverted or neutralized, to the end that the permanent magnet I3 will nevertheless. when its coil w15 is energiz'aed, causel suiicient flux through the wheel or axle coils, on the car or train to produce an` indication or control .by` lthe translating device t i c The parts thus far described are suitable .for etfecting an automatic variable ortapering control or indication for traffic which is` always in one and `the saine direction, in the case illustrated. from left toward the right. When there is no train or car present in a section or block, the relaysR, at the rear ends (left ends as illustrated) of the sections or blocks will 'be energizedfrom their associated track batteries 13 at the other. ends of vthey blocks, and accordingly their tongues or ainatures will be attractul-cand held in engagement rwith their contacts am as indicated in the drawing at the relaysR, at the rear endsof block E and` F. The result is that the windings '10 of the blocks to the rear, that is. of blocksli and D willl be energized while the windingsiem of these] saine blocks will be denergi'zedl because the armatures am are separated from contacts (11...` These windingsien receive theirmurf rent from the assixfiated *batteries 13,0, the .l current passing from one terminal qffsuch a battery B,o tothe armature a,,"tlienoe through the contact am, thence through the y ductor cm. if it 'is noticoniiected*to tliei'ail,

thence to the continuous rail or'conductor and back tothe other terminal of the battery. This energization of these coils wu.; causes such opposition tothe magneto-m-H tive forces of the associated perinanentmagnets 1- 1 and 1Fthat `should a train 101'] vehicle run into the lblock occupied byithese 'i permanent n'iagiiets."t-lie flux .that any oneY of them could produce tl'irouglithe` wheel would be no control effected or indication produced on the car or train. In other Words those blocks whose coils fwn are energized are in the clear condition allowing vehicle or vtrain movements thereover at (maximum speed.

But should there be a train or car in a block, as is indicated in block G, the two rails T, T of that block are conductively bridged by the wheels and axles of the car or train, forming alow resistance path for the current from the battery B, of the block G. The result is that the relay R4 at the left end of the block G is denergized with the result that its armature al, drops away from contact a15 and engages contact aw The result is that the coils 'w14 of block F are denergized but the coils w15 of block F are energized, current flowing from the battery -B10 through the relay tongue a13 of relay'R, at the left end of block G, thence through its contact am, through the coils w15 of block F and through the conductor om, if it is not connected to the continuous rail, thence to the continuous conductor or rail T which is connected to the other terminal of that battery B10. The result is that the magneto-I motive force of the permanent magnet PEl nearest the left end of the block F is opposed'by the ampere turns of coil w15. But'thisfopposition `is not complete for the permanent magnet P3 is still able to produce such a flux through the wheel or axle coils of a car or train which may enter block F from block E as to produce an efect upon the translating device t upon the car or train. But this i'luX being relatively small will only produce a certain degree of response of the translating device t, which may 'be of the character illustrated in Fig. 4

or of any other suitable type. The result is that if the speed of the train or car so entering, from block E to block F is higher than the previously determined or desired Speed, the speed will be slackened by' the control, or the engineman or motorman will receive such indication that he will reduce the speed of the train or car. If the first mentioned car or train remains in the block G, when the train or car which has entered the block F reaches the permanent magnet P2, if the speed of the car or train has not been suiicien-tly Aslackened the translating device t thereon will make a greater degree of response, because the iux produced by the permanent magnet P2 in opposition to itsjcoil rwu, will be greater than that prol duced by the permanent magnet P3.A Or

if the Speed of the caror train has been sufficiently slackened by the time it reaches the permanent magnet P2, the response of 4thetranslating d/evicet may be no dnerent from that when'passing permanent magnet P3, because there is less speed though greater` flux.

further slackened there will be a still greater response by the translating device t which will either automatically `bring the speed 'of the car or train down to a safe speed, or to rest if desired, because the flux produced by the permanent magnet I1 is even great/cr than that produced by the ermanent magnet P2, or will give an indication ordering reduction of speed or complete stop. Or if the speed isV below ak predetermined value on reaching magnet P1, the device t may not respond sufficiently to further reduce the speed or bring the car or train to rest.

If while the train or car vis moving in the block F the train or car in the block G should move oft' lof the block G into the next block ahead, as block H, not shown, the relay R4 at the left end of block Gr will again be energized and will attract its armature am away from contact am into engagement with contact am, with the'result that the coils i015 of block F will be dcnergized and coils 'w14 of block VF will lbe energized, thus -in effect clearing the 'block or allowing maximum speed the-rein.

Accordingly by the arrangement described as a train or car approaches a section or block that is occupied there is eifected upon 4such train or car an automatic tapering -nection of 016 to the continuous rail above referred to is not made. In such case the windings fw,4 and w15 connect at the left end of each block through a conductorl 016 with a contact al, carried by but insulated from the tongue or armature (L13 of the relay Rfx at the rear end ofthe second preceding block. And

this contact al, is adapted to engage with a stationary contact a1B connected to the continuous conductor or rail T.

Suppose there should be in block E a train or car moving from left toward the right and at the same time there should be in block Gr moving toward the left a car or train as indicated. In such case the train or car in block E will short circuit the winding of the relay It, at the left end of the block E, thereby breaking connection between contact al., and a18 of that relay, thus interrupting the circuit through the conductor om through which connection from both coils fw14 and w15 of block G is made withthe continuous conductor or rail T.

i The result s that neither the coils 10 nor the coilsav15 of block G can be energized, and they are in fact denergized under this circumstance, withthe result that all thc permanent magnets in the block G prodLice maximum flux through the wheel o1' axle coils of the train or car in block G, thus givingr maximum control or indication by itel translating device t, bringing` such train or -ar to rest. or suitably reducing its speed, A ,nd from the fact that there is a car or train in block (i as assumed, the relay R4 at the left end' oi bloc-k G `will be denergimzd with the result that the coils 10,5 of block- F are energized so that it the train assumed-in block E should run into block F it'will be suitably controlled or brought to rest as dee( ibcd in coruicction with trafilc in one di rection only. Accordingly the last described arrangeinrnt of Fig. 8 suitable for'auto-- matieally controlling tratlir in both, directions on a single track railway, the connections by conductora cw from the. coils from and 'w1 oi a block to the second blocl-r in the rear and there controlled by the track relay, serving? in elert to give overlapping com troia or indications.

ln place of the .upper continuous rail T ther? may be used for the er; tions of the coils from and "com and -the batteries lim a scp :irate and .independent conductor or wire exi tending along the path of travel.

In the circuit ot cach group ol? coils may be inserted a :resist-,ance RG for suitably adjusting the current through the coils lw14 to adjust the degree or extent of their opposition to the magnetoqnotive forces of their associated perm anent magri ets. And similarly in the circuit of cach group of. af'indings wm may be included a r f .ance lil for suitably adjusting the current in these coils to adi. just the. dre-free ,er extent ot' thir opporutilin lo their associated permanent magnets.

`While l have described the employment olf itlermanent magnete in Fig. 8, it is to be mi deretood that u'iembers of soft iron or steel may be employed in their stead with asso` ciated coils or windings for ceiitrollingi the controls, indications flux through them and through the wheel axle coils on the car or train,J such eeft 1ror steel members .co Ways hereinbefore doser iced,

I t will be understood as to Figs. 6, 'T and `Si that conductors other than the track rails may be 'employed in the circuits. including those track rails. l

The selectively or if'arlably responsive translating* device t on the ear or tram may effect "or cause any desired signals or inde cations, or may control the speed of the car or train by controlling the arr or other brakes to varying degrees or by controlling the speedof the driving engine or motor.

In Fig. 9 there 'is no car'circuit, the trans` lating device t1 to effect any suitable variable orsignals at prede? in rating in any of the mined points along the trackway being in- .eluded in a. cir :uit With the coils, w, 'w and-the ed, upon the translating de Vice,

reducing;` an effect, as herein- It will `be understood that where a permanen-t magnet is used as described, the source B2 may be omitted for in such ease also currentl will be induced in the coils o, c upon the passage of Wheels and axle.

And when the source B2 is present, the i'ierrnanent magnet P may be replaced by a bar or bars' of soft iron or steel and current will nevertheless be induced in the coils c, '0.y The translating device t1 may be used to 'count @are passing the Vcoils c, c or may Vus d for efeoting any contro] or indicatio oi guai. There will be a response for each pair of wheels and axle passing.

l'lhile in the arrangements hereinbcfore described the-permanent magnets or masses 'of softiron or steel have been reilierred to' as substantially'straiglit bars or laminated bars extendlnglacross thetrack, suoli erma- .nent magnets or soft iron or soft stee inembers may be U-shaped or in the shape of al horse shoe magnet as indicated in Fig. l0 at P4. Such shape is of particular 1when the member l?4 is a permanent magnet .for in such case the magnetic circuit through the permanent magnet itself is longer, and the portion ofthe magnetic circuit through the railsi 'Wheelsiand axle are relatively a :smaller part of the entire length of magnetic circuit. lt will be. understood that such Uehaped or horse shoe permanent ma net or other material may be used in any o the arrangements hereinbetore described; any of the coils ore-Xciting coils and their circuits hcreinbeiiore described being understood to be applicable as `well to this form ofgpermanent magnet or mass of soft iron or soft' steel. And it will be understood that such member 134 may be. buried in the track ballast or disposed in any suitable Way; and that the same maybe laminated.

And while l. have hereinbefore described the permanent magnets or messes of soft iron or steel as extending across the tracks, it will be understood that oneor both of the track rails T may. haiveinterpolatedgih them a section of rail `Tm of non-n1agnetic or substantially non-magnetic material such as manganese steel, asshown in Fig. 11. In this case the permanent magnet or massief advantage 'lao f Clo or poles. Pre erably the poles or ends of the members P., are substantially as far apart as the two 'Wheel axles A, A ol' a truck and -the rail Tm is preferably shorter than the 4distance.between the poles of P4. The tvvo i Wheels W, on one side of the truck and -some instances and axle coils in others it 1s rilnningnpon'the same rail, have some con nection betweenthem of magnetic material, such as the beam or member M1, which .may beV a partfof the usual truck frame or structure. It will be understood that as the truck passes over-'the rails the linx through, the-Wheel coils, or a coil surrounding the member M1, will be varied producing ellects in the circuit of thecoil or coils as upon the translating device t of any suitable chan acter such as herein described. And the other Wheels of the same truch running on the other rail, not shown, may be similarly equipped, and the other rail may be similarly equipped.- with a member Tm and a member P4, in which case the coil or coils cooperating with such other member l)ai may coperate with the first named coil or coils in controlling or affecting the car or train circuit, and such other member P, may have applied thereto windings or exciting coils 1n accordance with any of the arrangements 'illereinbefore described.

Whlle I have herein shown wheel coils' in to be understood that my invention is not so limited, for I may use Wheel coils vvliere axle coils are illustrated, and I may use axle coils Where Wheel coilsare illustrated, or Imay use both Wheel and axle coils in any case. And Where a plurality lof coils is used they may be connected in series, or in parallel with each other..

'What I claim is:

'1. The combination with a traveling vehicle, of a member of magnetic material disposed in the path of travel of said vehicle, an electric circuit on said vehicle in coperative relation with said member, a translating device in said circuit responsive indifferent degrees to different magnitudes of current in said circuit, and means'controlled to different degrees by said translating device as the latter responds in different degrees. ,2. Thecombination with a trave-ling vchicle, of a magnetdisposed in its path of travel, an electric circuit on said vehicle in cooperative relation With said magnet, a translating device responsive in different deto currents of .different strengths resulting in said circuit'froni cooperation of said circuit with sai'd magnet, and vehicle speed vcontrollingI means controlled to dif-- ferent degrees by said translating device as the latter responds i'n di'erent degrees.

The combination with a traveling vehicle, of a magnet disposed in its path of travel, an electric ,circuit on said vehicle in cooperative relation with said magnet, a translating device-responsive in different degrecs' to currents of different strengths resulting in said circuit from cooperation of said circuit with said magnet, vehicle speed controlling means controlled to different de grecs by said translating device as the latter responds -in different degrees, and traffic controlled means controlling said magnet.

4. The combination with-a traveling vehicle, of a permanent magnet disposed in the 'path oit travel of said vehicle, an elec-- tric circuit on said vehicle inductively inluenced by said magnet, a translating device in said circuit responsive in dilllerent degrees to dill'erent magnitudes o't current in said circuit, means controlled to different degrees b v said translating device as it responds in different degrees, a circuit including a source of current and a winding associated with said magnet., and means controlling thestrength of current in said last named circuit for varying the inductive effect ci' said magnet upon said vehicle circuit.

5. The. combination with a travelin; r ve hicle, of a permanent magnet disposed in the path of travel of said vehicle, an electric circuit on said vehicle inductively influenced b v said magnet, a translating device in said circuit responsive iu ('liil'erent degrees to diierent magnitudes of current in said circuit, means controlled to dilerent degrees by said translating device as it responds in different degrees, a circuit including a source of current and a winding associated with said magnet, and means automatically responsive to traffic conditions controllinff the strength. of current in said last name( circuit -for varying the inductive effect of said magnet upon said vehicle circuit.

fw. The combination with a traveling vehicle. of a magnet disposed in the path of tavel thereof, a vehicle circuit inductively influenced by said magnet, ay translating device responsive in dille-rent degrees -to electromotive-forces of dillerent magnitudes induced in said circuit. and means controlling said magnet to produce different quantities ot' flux greater than zero in response to dilr'erent tratlic conditions in the path ol travel of said vehicle.

l. The combination with a traveling vehicle. of a permanent inaglllft disposed in the path ot' travel thereof, a vehiclc'rircuit iuductively 4influenced by said permanent magnet` a translating device respousivil .in

different degrees to elcetro-motive-forces of different magnitudes induced in lsaid circuit,

and means controlling said permanent magnet to produce different quantities of flux greater'than zero in response to dlilerent traic conditions in the pathof travel of said vehicle.

l8. The combination with atraveling vehicle, of a permanent magnet disposed 1n the i goth of travel thereof, a vehicle-circuit inuctively influenced by said permanent magnet, a. translating device responsive in different degrees to electro-motive-forces of different magnitudes induced in said circuit, means controlling said permanent magnet to produce different quantities of flux eater than zero in response to different tra Vc conditions in the path of travel of said vehicle, and a brake valve controlled by said translatin device. 1

"'"9L- he combination with a traveling vehicle, of a magnetizable member disposed in `the path of travel ofsaid vehicle, a winding associated with said magnetizable member, a translating device and a source of currentinluded in circuit with said winding, .and means moving with said vehicle for causing changes in zfmignetiaz: flux in said winding,

said translating device respondingto said changesin flux inthe track magnet winding.

10. The mbination with a traveling vehicle, of a ,magnet/izable member disposed in the path `of'tluitvel-o said vehicle,"a winding associated with said magnetizable member, a

variably responsive translating device and a railway, of a horse shoe source of current included in circuit with said winding, and-means' moving with said -vehicle for causing changes in magnetic flux -in said` Winding.

`11. They combination with a traveling ve- 4hicle,of a permanent magnet disposed in the path of travel of said ve cle, a Winding associated with said permanent magnet, a' vari ablyresponsive translating device included iin circuit with said winding, a magnetizable mass movable with said vehicle, and means on said vehicle for producingin said mass a magnetic flux, 4

12. The combination with the rails of a ermanent magnet i having its ends or poles luxtaposed to said rails, aV vehicle traveling upon said rails, a

" circuit includingg` a translating device, and

a magnetizablemass movable Vwith said vehicle 'for changing the magnetic flux inclcsed by 'said circuit.

13. The combination with a path of travel,

` lof a vehicle movable thereover, a circuit and a member'of magnetic material, one of which is disposed on said vehicle and the other in said `path of trav`e1,and a translating device responsive to different degrees controlled by said circuit, and traiiie controilin means controlled to different degrees by said trans- "1 lating device .as it responds in different dehicle, of an electric circuit thereon including a variably responsive translating device, an air brake system on said vehicle,- a valve coutrolling saidA system, means variably con-V trolled by said. translating device for causing said valve to take different positions, a ermanent magnet or a magnetizable mass disposed -in the path of travel of said vehicle, said translating device aii'ected to varying degrees in response. to varying effects of vehicle speed and magnetic flux, whereby said valve automatically takes said dilerent positions.

15. The combination with armoving ve hicle, of an electric circuit thereon including a variably responsive translating device and a source of current, an air brake system on said vehicle, a valve controlling said sys- Vtem, means variably controlled by said crans lating device for causing said valve to take different positions, a permanent magnet or a, milgnetizable mass disposedin the path ot' travel of Vsaid vehicle, said translating device affected to varying degrees in response to varying effects of vehicle speed and mag`- netic fiux, whereby said valve automatically takes said dilierent positions.

16. The combination with a traveling veV hicle, of acircuit wholly disposed thereon including a. variably responsive translating device, and means disposed along the path of travel of said vehicle'for progressively changing lthe magnetic fluxes inclosed by said circuit. l

17. Theconibination with, traveling vehicle, of a circuit thereon including n translating device, and means disposed along the path of travel of said vehicle for progressively changing the magnetic fluxes inclosed by said circuit, said means comprising a plu- `said vehicle for progressively changing the magnetic fluxes inclosed by'said circuit, said means comprising u plurality of permanent magnets.

19. The combination with a traveling vehicle, of a circuit thereon ii'icluding a translating device, means disposed along the path of travel of said vehicle fory progressively changing the magnetic fluxes inclosed by said circuit, and means responsive to the presence of a vehicle on said path of travel .at a distance from said iirst named vehicle for increasing one or more of said fluxes.

20. The combination with 'a traveling vehicle, of a circuit thereon including a variably responsive translating device, means disposed along the path of travel of said vehicle for progressively 4changing the magneticfiuxes inclosed `said circuit, and means responsive to the presence of a ve- Q2'. The combination with a trave-'ling vehielo, of a circuit thereon including a translating device, means disposed along the path ot travel oi' said vehicle for progressively changing the magnetic Huiles inclosed by said circuit` and means responsive to the presence ot' a vehicle on said path of travel at. a dist-ance trom said first named vehicle tor rendering all said iuxes substantially equal to the greatest of said Huxcs.

Q3. The combination with a traveling vehicle, of a circuit thereon including a. translating device, means disposed along the path of trave-l oi' said vehicle for progressively changing the magnetic lluxes inclosed by said circuit, and means responsive to the presence of' a vehicle on said path of travel atardistance from said lirst .named vehicle for reducing said fluxes to such degree that said translatingdevice is non-responsive.

24. The combination with a' plurality ot blocks, of a traveling vehicle, a circuit. lincluding a translating device disposed upon said vehicle, a. plurality of sources of magneto-motive torce disposed along the pat-h ot' travel ot' said vehicle within a block, windings adapted to lnoduce magneto-anotive 'torce-s in opposition to the 1iiagueto-motivc forces produced by said sources` and means responsive to the condition of another block controlling said windings.

24" The. combination with aplu-rality of blocks, vofa traveling vehicle` a circuit including a translating device disposed upon said vehicle, a: plurality ot sources ot' magneto-motive torce disposed along the path of travel of said vehicle within a' block, wind,

ings adapted to produce. magneto-m'otive torres in opposition to the magneto-motive forces'produced by said sources, and means responsive to the condition of another block controlling said windings, said windings producing magneto-motive 'forces of dilierent intensities.

26. The. combination \vith a. plurality ot' blocks, ot a traveling vehicle, a circuit on said vehicle including a translating device, a plurality oli permanent magnet-s disposed alongr the path ot' travel of said vehicle with ina block, windings associated with said perinal'ient magnets producingv dltl'erent numbers of ampere turns, and means responsive to the `condition of another blockv for controlling said windings.

27. The combination with a plurality of blocks, of a travelingvehicle, a circuit on said-vehicle including a translating device,

a plurality of permanent magnets disposed alone the path ot travel of said car within a hloclii, windings associated with said 1nag nets adapted to reduce the magnetic fluxes successively 'inclosd by said vehicle circuit to a degree to render said translating device unresponsive, and means responsive to the condition of another .block controlling said windings.

QS. The combination with a plurality of blocks, of a traveling vehicle, a circuiti onsaid vehicle including a translating device, a plurality of permanent magnets di osed along the path of travel of said vehicle Wit'h- S5 in a block. windings associated with said magnets adapted to reduce the magnetic liuxes successively inclosed by said vehicle. circuit to a degree to render said translating device unresponsive, additional Win'd- 90 ings associated with said permanent magnets producing different numbers of ampere turns in opposition' to the magneto motive forces of said permanent magnets, and means responsive to the condition of another lolockA for causing energization oi one or the other oi' said sets of windings.

'22). The combination with a plurality of blocks, ot' a. traveling vehicie, a circuit on said vehicle including a translating device, a plurality of permanent magnets disposedv along the path ot travel o'said vehicle within a block, windings lssociated` with said magnets adapted to reduce the magnetic fluxes successively inclosed by said 105 vehicle circuit to a. degree to render said translating device unresponsive, additional windings associated with said permanent magnets producing different numbers of ampere turns in opposition to the magneto- 110 motive forces ofA said permanent magnets, and means responsive to the condition of another block preventing or permitting the energization of either set of windings.

30. The combination with a -plurality of blocks, of a traveling vehicle, a circuit on said vehicle including .al translating'd'evice,

a plurality of permanent magnets disposed'- along the path of travel of said vehicle within a block, `windings associated' with 120 said magnets adapted to reduce-the.mag netie fluxes successively in'closed by said vehicle circuit to a degree to .render said translating device unresponsive, additional windings associated with sai-d permanent' 125 magnets producing different numbers of `ampere turns :'in-oppositionto --the m- 'i neto-motive forces o fsaid permanent mag nets, means responsive to the condition of another block for causing energization of 130.

one or the other 'aid setsA of windings.y and `means respon ive to the conilitiiiin of' a thiriil block for ijiermitting or preveiiting iontiol of` either set ot' said ivinilings bv said last named means,

- 31. The coi'iibination with aI traveling vehicle, of `a circuitthereon including a variably responsive'triins'latin' device, v i able "speed controlling means c itrolled by said `trai'iislatiiig device, inea disposed along the path of travel ct said. ieliiclc for affect-nig the amount of mailini-itic flux cli'isedby said vehicle cir t, and n'ieiins i' respon. ve to traffic coniilitioi'is on said path i 15 of travel for controlling said means, ii'lieieby the speed Iof said car at any point on.

said path of travel is iiutoiiiiitically determined.

3Q. The combn'iation with a hic1e,-of a Acuit thereon im traveling` vii.. g a vari ably respoi rive translatii'ig' ij iid.

i, '":iriable speed controlling means coiiii oiled by said translating device, a pliiiriility of magnetic flux determining members disposed along the path of travel of said vehicle, means responsive to traffic conditions on said pathf of travel i'sontrolling,r said members,y the fiuxes controlled by said mei'iibers increas jing Inrogressively in the direction of travel of said vehicle, whereby less than predetermined speed,` of said vehicle insured at predetermined points in .its path of travel.

33. The combii'iatii'in with, a traveling. vehicle, of' an electric circuit thereon includ ing a variably responsive translating de vice, variable speed conti-oliii'iirir means contri'illeilfby said translating ilevice, a plurality of magnetic flux. contri'illiiig nien'ibers d along;r the path of travel of said a nd n'iea responsive to traffic conditions on said path of traveleither in advance of or in the rear of" i" 'l vehicle con- .Jy the speed of said vehicle is caiiised to ifliii'iinisli to or not exceed a predeterniinei'l specifi at a iiredetern'iined distance 'from San ii'ieansu 34. The comliination with a traveling ve rhicle, of an electricrcircuit thereon including `e variably respoi'isive translatingden vice, variable speed contri'illing means con disp( ytrolled by said translating device, a plural.-

lty "of magnetic flux ciintrolling members disposed along the path -ot' travel of said vehicle, and means responsive to traffic conditions on said path of travel either in ad Vance of." or in, the rear of said vehicle controlling said members, whereby the speed of said vehicle is caused to diminish to or not exceed a predeterminedspeed at a predetermined distance from said means, the

flux caused or controlled'by said i'iiembers increasing in the direction of travel of said vehicle.

35. The combination 'with a moving ven hicle, ofv an electric circuit thereon incl udiner vehicle controlli: f' means selectively responto diflerent electroniot1ve for :es 11nfid iipijinisaii'l circuit, a series of magpre. netic inenil'iers spaced along.,r the path of travel of said veliicle,` and means responsive to the presence `of and ii'ioven'ient of another veli'icle on said path of 4traii'el for causing travel of a vasaid-path of travel for causing progression iiloiip,r said path of travel of a varii'ition in the magnetic fiiixes ofisaid i'iienibers, whereby said secoiidvehicle or obstacle maintains a predeteri'nined space between itself and said first named vehicle.

'37. The ciiinibination with a traveling vehicle, of an electric circuit thereon including aA trai'islatingdevice, of a. series of magnetic ii'iembers spaced alongl saidf path of travel, y

said circuit on said vehicle ladapted to inclose magnetlc flux of sind members, land means responsive to the niiiiveiiient of another similarly equipped vehicle along said path f travel for causing a progression along said path of travely of predetermined variation of said magnetic fluxes, `whereby said translating device on said first named vehicle responds upon approach of Said first named vehicle within a predetermined distance of said second named vehicle, and means responsive to the position ofsaid first named vehiclecaiising autranslating device of said second vehicle similarly equipped to respond when said vehicles :reproach each otl'i'er' within a ireiiletermined distance.

The com ination with a movingveliicle, of an electric circuit on said vehicle including a translating device, a series of magnetic memliiers spaced along the path of travel of saidvehicle, niieansresponsive to the presence of and movei'iient of another vehicle on said path of travel `for causing progression along said path of travel of a variation in the magnetic fluxes of said members, whereby said second vehicle maintains a predeterii'iined s ace between itself and said first named ve icle, and s eed controlling meanson said` first name vehicle controlled by its translating device;I

39. The combination with a traveling vehicle, of an electric circuit thereon including a translating device, of a series of magnetic members spaced along said path of travel, said circuit'on `said vehicle adaptedto inclose magnetic iiiix of said members, means responsive to the movement of another simi larly equipped vehicle along said path of travel for causing' e progression along; seid path oi' travel oi' predetermined.variation of said magnetic: fluxes, whereby seid transloting device on seid iii-st.. named vehicle i'e spends upon approach oi' seid iii-st named vehieie Within :L predetermined distance said second named vehicle, and ineens responsive to the position of said first named vehicle causing a tmnshiting device ot' seid second Vehicle similarly equipped to respond when said vehicles approach each other within e predetermined distance; and speed con;

trolling Ineens on seid vvehicles @controlled by their tienslating devices.

40. The combination `with u' plu ity of blocks, of e traveling vehicle, e eil-enit in- @hiding a translating device disposed upon Leoni-34:5

seid vehicle, e plurality of sources of inegneto-motive oroe disposed along the path of 'travel of seid vehicle 'within e biock, Winch ings adapted to produce magneto -motive oiees in opposition to the magneto motive forces of seid sources, e continuous conductor common to neighboring blocksj a Circuit ino-hiding said Continuous conductor and Seid windings, und ineens responsive to the condition of another block controlling said circuit.

In testimony whereof I have hereunto.

affixed my signature in the presence of the two subseiibnig Witnesses.

GEORGE P. FINNIGAN.

Witnesses Nehme FIELD, A S. H. ROCHESTER.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5234184 *Nov 27, 1991Aug 10, 1993Union Switch & Signal Inc.Locomotive axle mounted cab signaling sensor
US5242136 *Nov 16, 1990Sep 7, 1993British Railways BoardRailway signalling systems
US5263670 *Feb 13, 1992Nov 23, 1993Union Switch & Signal Inc.Cab signalling system utilizing coded track circuit signals
EP2277763A1 *Jun 30, 2009Jan 26, 2011Bombardier Transportation GmbHGuarantee of a low-ohm electrical connection between wheels of a rail vehicle and rails
Classifications
U.S. Classification246/47, 246/28.00F, 246/194
Cooperative ClassificationB61L3/08