US1741440A - Induction train-control system - Google Patents

Description

Dec. 31, 1929. A. G. SHAVER ET AL mnucnou TRAIN CONTROL SYSTEM F1 ed May 4, 1923' 2 Sheets-Sheet //v yavme; Au) 6. J HIVEE F/fffl M Ahab/z VVf/G A TTORNE s Dec. 31, 1929. A. SHAVER ET AL INDUCTION TRAIN CONTROL SYSTEM Filed May 4, 1925 2 Sheets-Sheet 2 V I 4 I55 762 ATTORNES Patented Dec. 31, 1929 Uttttii stares AnoHIBALD G. SHAVER, or CHICAGO,

NIAGARA FALLs, NEVJ' YORK, ASSIGNORS TO THE BEGAN ILLINOIS, AND FRED M. ROSENZWEIG, OF

SAFETY DEVICES COM- FANY, ING., OF NEW YORK, N. 1., A CORPORATION OF NEW YORK INDUCTION TRAIN-CONTROL SYSTEM Application filed May 4, 1923. Serial No. 636,552.

This invention relates to automatic train control systems, and has special reference to the provision of an improved automatic train control system of the induction type.

A principal object of the present invention comprehends the provision of an induction train control system in which train carried mechanism is operated to produce a plurality of different effects responsive to the cooperation between vehicle carried and roadside inductor means, the construction and the cooperation being such that the vehicle carried inductor means is influenced by the roadside inductor means to produce a controlling, such as a tripping action of the vehicle carried mechanism, to control the movement of the vehicle, and is then influenced under one or more different roadside conditions to produce a modifying or resetting action of the vehicle carried mechanism.

A further principal object of the present invention relates to the provision of an inductive system of the type referred to in which the vehicle carried and roadside inductor neans are operated by means of a vehicle carried source of energy.

A still further principal object of the invention includes the provision of a system of the nature referred to in which the vehicle carried and roadside inductor means are constructed so as to cooperate for periodically producing a controlling or tripping operation of the train carried mechanism or for producing such an operation only under danger and caution roadside conditions, and for producing a resetting action of the vehicle carried mechanism under caution and clear roadside conditions when the same has been tripped.

Further objects of the invention include the provision of an induction system in which a vehicle carried inductor is employed for energizing the vehicle carried mechanism, the said energizing inductor functioning also in cooperation with the roadside mechanism for producing the controlling or tripping operation of the vehicle carried mechanism, and for producing the resetting thereof; and the further provision of a system of this nature in which the parts of the system are coordinated to produce proceed, proceed at caution and stop effects in the vehicle in response to clear, caution and danger conditions on the roadside.

To the accomplishment of the foregoing and such other objects as may hereinafter appear, our invention consists in the elements and their relation one to the other, as hereinafter particularly described and sought to be defined in the claims, reference being had to the accompanying drawings which show a preferred embodiment of our invention and in which: 7

Fig. 1 is a view showing a track subdivided into blocks or sections with the roadside inductor means in each section,

Fig. 2 is a view showing the vehicle carried mechanism and the cooperating roadside mechanism, r

Fig. 3 is a view showing a modification of the roadside mechanism,

Fig. 4 is a detail view showing a modilied form of vehicle carried inductor means, and

Figs. 5 and 6 are views showing two modifications of the inductive train control system of our invention.

Before describing in detail the system of our invention, we will briefly premise that in our inductive train control system a train control mechanism,'such as a valve V which may control the train line of an air brake system, is operated by means of train carried energy such as the alternating current generator G, and is controlled by the coo aeration of a vehicle carried inductor means generally. designated as A and a roadside inductor means generally designated as B, the vehicle carried and roadside inductor means AB cooperating to periodically produce a controlling operation of the valve V or to produce such an operation under one or more roadside conditions such as a danger or cantion condition and to modify such controlling operation of the valve V by a resetting action under clear and caution roadside conditions.

The valve V may be any suitable valve for controlling the flow of air in the train line of an air brake system, such valve being preferably of the type shown in the patent to- A. G. Shaver No. 1,411,526 of April 4, 1922. The valve V is controlled by means of an electromagnet 10 which is normally energized by a vehicle carried circuit designated for convenience as it (see Fig. 2) and comprising the generator G, conductors 11, 12 and 13, contact 14 which is normally closed by the energization of a relay F, conductor 15, conductor 16, coil of electromaget 10 and conductors 17 18 and 19.

In the preferred embodiment of our invention, the circuit 7b is controlled and operated to produce proceed, proceed at caution and stop effects in response to clear, caution, and danger roadside conditions. Under clear roadside conditions the circuit h is closed at the contact 14 due to the onergization of the relay F, which relay is deenergized under danger roadside conditions to effect the opening of the contact 14 and the opening and the deenergizing ot the circuit 7L and electro-magnet 10 respectively. Under caution track conditions the circuit FL is controlled by a branch or'partial circuit arranged in parallel with the contact 14, the said branch or partial circuit comprising the conductor 20, a speed circuit controller 21, the contacts of which are closed when the vehicle is traveling at or below a predetermined speed and. are opened when the vehicle exceeds such speed, conductor 22, contact 23 controlled by a relay H, and conductor 24. Under caution track conditions the relay His energized to close the contact 23, placing the circuit h under the control of the speed circuit controller 21 so that when the speed. of the vehicle under the caution track conditions does not exceed the predetermined or fixed speed, the electromagnet 10 is energized to permit the train to proceed under restriction; and when such speed of the vehicle is exceeded, the electromagnet 10 is de-v energizcd to operate the train venting valve V to bring the train to a stop.

The relays F and H are operated by means of the vehicle carried source of energy G and are controlled by the cooperation of the vehicle carried and roadside inductor means AB. The relay F is a two-element relayhavthe field f and the armature 7 arranged in series in a stick circuit which may be designated for convenience as 2' comprising the contact 25 controlled by the relay F, the conductor 26, conductor 27, condenser 28, the coil of an inductor element 6, conductor 29, the coil of an inductor element a, conductor 30, relay element f, conductor 31, relay element 7" and conductor 32. This circuit 2' is normally energized by a circuit, which for convenience may be designated as 70, comprising the generator G, conductor 11, conductor 34, the coil of an inductor element a, conductor and conductors 18 and 19. The elements a b and c are inductively related so that under normal conditions with the circuit 2' closed, the relay F is energized to maintain its contacts 14 and 25 closed. 1

The relay H is also a two-element relay having the field h and the armature k arranged in series in a stick circuit which may be designated as Z comprising a contact 36 which is open under normal conditions and which is closed when the relay H is energized in response to caution conditions, as will become clearer hereinafter, a conductor 37, the conductor 27 condenser 28, element 6, conductor 29, inductor element 0, conductor 30, a conductor 38, relay element k conductor 42, relay element 72/, and conductor 43. The inductors b and 0 being inductively related to the energizing inductor a, when the circuit Z is closed, the relay H will be energized from the energizing circuit k and the generator G. Condenser 28 is provided in the circuits 2' and Z respectively, for the purpose of adjustingthese circuits to the proper state of impedance.

Cooperating with the inductor elements a, Z) and c of the vehicle carried inductor means A, there is provided a roadside magnetic element E forming part of the roadside inductor means B, the said element E, in the form of the invention illustrated in Figs. 1 and 2, comprising an inert element located at a controlling point or station and positioned preferably between the rails r, 1', an inert element E being provided for each section or block of the track such as the sections X and Y shown in Fig. 1; and the cooperation between the vehicle carried inductor elements a, b and 0 and the inert track element E is such that in the movement of the vehicle and the vehicle carried mechanisminthe direction as indicated by the arrow in Fig. 1, the vehicle inductor elements will move over so as to be influenced by the roadside element E. to produce a controlling operation of that relay F or H which is in an energized state.

The operation of the system thus far described is as follows: Then the train is running without restriction between control stations, the energizing vehicle inductor a functions in the nature of the primary of a transformer, the secondaries of which are the in ductor elements I) and c which are energized for operating the relay F in the circuit 4' to maintain the train control circuit it normally closed. WVhen the train reaches a control station the vehicle carried inductor elements a, Z; and 0 move over and cover the roadside element E, and the vehicle carried induct-or elements are influenced to produce a controlling such as a tripping operation in the relay F due to a diverting or shunting of the magnetic flux of the inductor a by the element E and due to a change in the reluctance of-the magnetic circuits of the vehicle carried inductors a, Z) and 0 produced by the presence of the inert element E, the change in the reluctance the secondary or of the magnetic circuit of the elements Z) and 0 having the effect of changing the state of impedance of the train carried circuit 2' resulting in an effective deenergization of the control relay F. Similarly when the train is running under caution conditions between control stations and the vehicle carried circuit Z is closed for error zing the relay Hi the vehicle carried inductor elements a, b and 0 again function in the nature of a transformer, the element a acting as the primary or ener gizing inductor, and the elements 5 and. 0 as rec-lyin inductor for the circuit Z for energizing the rela H and c2 0 J maintaining the circuit Z closed When,

however the train running under caution conditions reaches a control station, the vehicle inductor elements a, Z) and 0 move over and are influenced by the inert element E to divert or shunt the flux flowing thru the transformer secondary and to change the state of impedance of the train carried cuit Z for producing an effective deener tion of the relay ii, the deenergization or ,7 relay causing the opening of the control circuit h at the contact 23 and ca the opening of the sticlr circuit Z at the contact 36.

It will thus be seen that with the provision of the system described, a train runnirn der clear or caution conditions will always he influenced when passing a control station for producing a tripping or the train re lays to efiect a stop indication in the train mechanism and that the stop indication will persist in toe absence of any modifying influence or resetting operation.

For the purpose of preventing a stop i ndication produced by the tripping oi eith r relay F or H from becoming effective to opcrate the brake valvemagnet l0 under clear or caution roadside conditions, there is provided cooperating vehicle and roadside inductor means for modifying the controlling operation produced by the inert element E, the modifying comprehending the resetting of the relay F under clear track conditions to close the circuit it so as to permit the train to proceed without restriction, or the resetting of the relay H under caution trac r conditions to place the control circuit h under the control of the speed controller 21 to permit the train to proceed under a speed limitation.

For resetting the relay F, we prete ably provide a reset partial circuit including the conductors 56 and 57 and contact 58 these parts being arranged in parallel with the stick contact 25 of the relay F, the contact 58 being controlled by an indication receiver F which may be of the twoelement type having a iield f always ener ized from the vehicle carried generator G and connected thereto by means of the conductors 59 and connected to the conductors 19 and 11 respectively, and an armature f included in a circuit which may designated as 0 comprising the armature f conductor 61, coil of a vehicle carried inductor d, and conductor 62.

For resetting the relay H we preferably provide a rese'tin artial circuit comprising a conductor 63 co. actor (34 contact 65, conductor (36 and conductor 67. this partial circuit being arranged in parallel with the stick contact 36 oil? the relay the contact 65, be controlled by an ii creation receiver ll. which may also be of the t-wo-elen'ient type having the held if energized from the generator G and connected thereto by means of the conductors 68 and 69, ant. the armature h arranged in a circuit which n be designated as g) compi'sing the armature k conductor 70., coil of ayehiele carried inductor element 0, and conductor'il.

Cooperating with the vehicle carried inductor elements (Z and 6 there are provided roadside inductor elements (Z and c which are selectively energized by means to be described presently for inductively influencing the vehicle carried inductor elements (Z and o in the movement or the vehicle over the roadway.

For inductively influencing the vehicle carried inductor element (Z the roadside element (Z is arranged on the roadway so that the vehicle element (Z moves thereover when the vehicle passes a controlling station and is arranged in a roadside circuit on including a conductor 4-5, a roadside inductor element a positio .d so as to correspond and be in inductive relation with the vehicle carried energizing inductor a, conductor 46, a condenser 47, conductor d8, a contact 4:9 controlled by a home or traclr relay T, a conductor 50, a contact 51 controlled by a distant relay D, conductor 52 and coil of the inductor element cl, the condenser 47 being provided in this circuit for correcting the impedance factor thereof.

The home and distant relays T and D are operated in accordance with roadside conditions as will be described presently, so that under clear roadside conditions both of these relays are energized to close the contacts 49 and 51 for closing the roadside inductor circuit on. Under such clear roadside conditions with the circuit m closed, the vehicle carried energizing inductor a energizes the roadside inductor element a, the said roadside element functioning as a receiving inductor for producing an impulse which is transmitted to the roadside tra emitting inductor cl, an impulse being in turn transmitted by the element (Z, to the receiving inductor element (Z, the received impulse being suiiicient to energize thearmature f of the indication receiver F. Thus under clear road side conditions after the relay F has been tripped or deenergized by the inert element E, the indication receiver F is energized by the cooperation or" the train and track inductors to close the contact 58 controlled thereby :tor the energizing of the relay F, energization of the relay effecting the closing of: contacts 14: and 25 controlled thereby. It will be understood that the closing of the contact 25 closes the vehicle circuit 1' and permits the energization of the relay F from the energizing circuit 70 due to the resumed activity or the transformer combination a, Z) and 0 after the same has passed an inert element E. It will be further apparent that due to the closing of the stick contact 25 the energization of the circuit 2' will persist after the vehicle carried element d passes beyond the roadside element (Z.

For inductively influencing the vehicle carried inductor e to operate the indication receiver H, the roadside inductor element 6 is arranged for inductive cooperation with the vehicle carried inductor c in the movement of the vehicle over the roadway, and arranged in another circuit generally designated as is including the conductor 53, the coil of the element 6, conductor back contact 55, contact 51 normally open and closed when the relay D is deenergized, conductor 50, contact l9, conductor 48, condenser 47, conductor 4:6, and receiving inductor element a.

Under caution roadside conditions the distant relay D is deenergized as will appear hereinafter, and the contact 51 will drop onto its back contact 55 to close the inductor circuit a. When the vehicle carried inductor means A passes the inductor means B under such caution roadside conditions, after a tripping operation of the train mechanism has taken place, the roadside receiving inductor a which receives energy from the vehicle energizing inductor a transmits such energy to the roadside transmitting inductor c for producing an impulse in the corre sponding vehicle carried inductor e, the said imoulse being sufficient to energize the armature h of the indication receiver H to momentarily close the contact of the reset circuit controlling the relay H. It Will be understood that when the relay H is energized, the contacts 23 and 36 controlled thereby are closed, the closing of the contact 36 resulting in the cnergization of the relay H by the transformer combination a, b and 0, the transformer combination having resumed activity after passin the inert element E. It will be further understood that since the stick contact 36 is now closed, the circuit Z will persist in an energized state even after the vehicle inductor element 0 passes the roadside inductor element 6.

Under danger track conditions the home and distant relays T and D will both be deenergized as will appear hereinafter, and both the roadside inductor circuits m and n will be opened due to the opening of the contact 49 so that the tripping or deenergizing oi eith or relay F or H by the roadside element E will not be modified when the vehicle inductor elements a and 6 move over the roadand the control circuit h will thereby be placed under the control of the speed circuit controller 21.

The home and distant relays T and D associated with the inductor roadside means B of any given block are controlled respectively by the block in advance and the second block in advance, and to this end the home relays T may be connected to the insulated rail sections 7, r of a block by means of the conductors 77 and 78, the relay T being energized by means of a track battery 79 provided for each block; and the distant relay D of each block is controlled by the home relay T 01" the next succeeding block, such control being provided for example by placing a distant relay D in a circuit controlled by the home relay 'l of the block in advance, the circuit including conductor 80, battery 81, con ductor 82, contact 83 under the control of the track relay T of the next block in advance, conductor 84, and coil of the distant relay D.

The operation of the train control system shown in Figs. 1 and 2 is substantially as follows lVhen the train is running between control stations without restriction, the vehicle relay F is in an energized state and the vehicle relay H is in a deenergized state; and when the train is running between control stations under a speed restriction, the relay H is in an energized state and the relay F in a deenergized state. When such a vehicle running either with or without restriction passes a control station, the vehicle carried inductor means A cooperates with the element E of the roadside inductor means B to produce a tripping or a deenergizing of either the relay F or H according to which happens to be energized. If the control station indicates clear roadside conditions, the vehicle inductor elements a, (Z cooperate with the roadside inductor elements a, to reset or reenergize the relay F so as to permit the train to proceed without restriction. If, however, the control station indicates caution conditions ahead, the vehicle inductor elements a and c cooperate with the roadside inductor elements a and c to operate or reset the vehicle carried relay H to place the train under speed restriction. If however the control station indicates danger, the relays F and H will remain deenergized and the train will be brought to a halt, and may then be made to proceed under restriction by operation of the switch 75.

Referring now to Fig. 3 of the drawings, we show a modification of the roadside inductor means which is here generally designated as B, this roadside inductor means comprising resetting elements and resetting inductor circuits similar to those heretofore described, the parts being here designated by similar reference characters, and a tripping mechanism which differs from the inert magnetic tripping element E shown in Fig. 2, the tripping element E comprising three inductor coils 85, 86 and 87 arranged in a circuit gen- 5 erally designated as 3 including the three inductor coils in series, the conductor 88, condenser 89, conductor 90, contact 91 under the control of the distant relay D, conductor 92, contact 93 under the control of the home relay T, and conductor 94, the condenser 89 being provided in this circuit for adjusting the impedance of the same. With this arrangement under clear conditions ahead no tripping of the relay F will take place, the relays F and H being operated to tripped condition only when the contact 91 or 93 is opened in response to caution or danger roadside conditions.

Referring now to Fig. 4 of the drawings, we show a modification of the vehicle carried inductor combination a, Z) and 0, the coil of the energizing inductor a being provided with one or more turns such as 96 and 97 wound about the cores of the inductor elements 0 and b respectively, the construction being such that these windings act as opposing or bucking windings, the current therein opposing the induced current in the elements 6 and c, the opposition being just sufficient to neutralize any such induced current which may result from magnetic leakage between the inductor elements when the same move over the tripping element E.

Referring now to Fig. 5 of the drawings, we show a modification of our inductive train control system embodying a three speed control of the vehiclecarried mechanism, the said mechanism including a vehicle carried inductive means which is responsive to a change of current characteristic in the circuits thereof and a roadside inductive means operable for transmitting currents of different characteristics to the vehicle carried inductor means to operate the same.

The three speed control of the vehicle carried mechanism includes a high, medium and low speed control effective under clear, caution and danger track conditions respectively. Under clear track conditions the brake valve V is maintained closed by the energization of an electromagnet 110 which is energized under clear running conditions of the vehicle by a circuit including the generator G, the conductor 111, electromagnet 110, conductor 112, eenc'luctor 113,

contact 114 normally closed, conductor 115 leading to the high speed contact point 116, speed circuit controller 121, conductor 117 and conductor 119. Under clear running conditions of the train this circuit is controlled at the high speed contact point 116, the operation being such that the train is permitted to proceed only when moving at or below a predetermined high speed. Under caution or danger track conditions the contact 11 1 will be opened as will become clearer hereinafterfor effecting the opening of this circuit and the deenergization of the magnet 110 in the absence of any modifying influence.

Under caution roadside conditions the medium speed control of the electromagnet 110 is effective by means of a circuit including the generator G, conductor 111, electromagnet 110, conductor 112, conductor 118, a contact 120 which is open as shown and which is adapted to be closed manually as v ill appear presently, conductor 121, conductor 122, conductor 12%, contact 123, which is closed under caution track conditions as will appear hereinafter, conductor 126 leadto the medium speed control contact 127 closed by the speed circuit controller 121 when the vehicle reaches a predetermined. medium speed and conductors 117 and 119. This circuit is normally open at the contacts 120 and 123, and in rendering the circuit operative the contact 123 is closed automatically as will be seen hereinafter, and the contact 120 if open must be closed manually by operation of the push key mechanism 128. Upon operation of the push key 128 the contact 120 will be closed and if the speed of the vehicle has reached the predetermined medium speed the contact 120 will be held in closed position by the energization of an electromagnet 129 energized by a circuit comprising the conductor 111, the conductor 130, electromagnet 129, a conductor131, contact 132, conductor 122, conductor 124:, contact 123, conductor 126 medium speed contact point 127, speed circuit controller 121, and conductors 117 and 119. By this means the medium speed circuit controlling the valve V cannot become effective until the speed of the vehicle is at or below the pre determined medium speed and caution conditions exist on the roadside.

Under danger roadside conditions the valve V is controlled to permit the train to proceedc at a predetermined low speed by means of a circuit comprising generator G, the conductor 111, electromagnet 110, conductor 112, conductor 118, contact 120, conductors 121 and 122, a low speed contact 133, speed circuit controller 121 and conductors 117 and 119. This circuit, it will be noted, is normally open at the contact 120 and is not controlled by either of the ant rnatically operated contacts 1. 23 and. 1.14.; i said circuit being manually controlled by operation of the key 128 and controlled so that th train may be permitted to proceed at or below the predetermined low speed only after the speed of the train has been reduced to such predetermind speed. To prevent the low speed control from becoming otherwise effective, the key 128 is of the single impulse type disclosed in the eopendin application of A. G. Shaver Serial No. 634,053, filed April 23, 1923, and is so operative as to prevent the contact 120 from holding its closed position unless the electromagnet 129 is energized. For the low speed the electromagnet 129 is energized only when the train reaches the predetermined low speed, the energization resulting from the closing of the following circuit: generator G, conductor 111, conductors 130 and 131, contact- 132 closed when the key 128 is operated, conductor 122, low speed contact point 133, speed circuit controller 121, and conductors 117 and 119. This circuit it will be seen may be closed only when the train reaches the low speed and the electromagnet 129 will remain energized for permitting low speed control only when the train maintains a speed at or below the predetermined minimum.

For controlling the valve V under clear and caution conditions, the contacts 114 and 123 are operated by means of a relay mechanism F and controlled by the cooperation of the vehicle carried inductor means A and the roadside inductor means B The relay mechanism F is of type which is responsive to a change in the current characteristic in either the field or armature and comprises the field f common to two armatures and f, the said armatures being operative for controlling the contacts 123 and 114 and additional contacts 136 and 125 and operating these contacts so that when the current in the armatures f and f is in phase with that in the field 7, the contacts 125 and 114 will be moved to closed position and the contacts 136 and 123 will be moved to open position, and when the currentin the said armatures is 180 out of phase with that in the field W, the contacts 136 and 123 will be operated. to closed position and the contacts 125 and 114 will be operated to open position. By this means it will be noted that the contacts are po itively operated electrically to both the operat ve and inoperative positions.

The field f is normally energized from an inductor a by means of the circuit comprising the field f condenser 134, conductor 135, a resistance 137, resistance 138, conductor 139, coil of the inductor element a and conductor 140. The inductor element a is related. inductively to the two inductor elements 6 and 0 the latter inductors being arranged in an energizing circuit including the generator G, the conductor 141, winding of element 6 a bucking winding 142, winding of element 0 and conductor 143. With this arrangement it will be understood that normally, as when the train is running under clear conditions between control stations, the field will be energized due to the inductive coupling between the elements 05 b and 0 The armatures f and f of the relay F are arranged in series and are controlled by the following circuits: Under clear running conditions the energizing circuit for the armatures includes the resistance 138 which presents an energizing potential drop, the conductor 144, the armatures f and f in series, conductor 145, contact 125 closed, and conductor 146. Under caution running conditions the energizing circuit for the armatures comprises the resistance 137 which presents an energizing potential drop, conductor 144, armatures f and f in series, conductor 145, contact 136 closed under caution conditions, conductor 147, and conductor 148. With this arrangement it will be seen that the resistances 138 and 137 energize the armatures with currents of dilierent phases, the arrangement being such that the resistance 138 energizes the armatures with a current in phase with that in the field 7, and the resistance 137 energizes the armatures with current 180 out of phase with that in the field 7.

For producing a controlling condition in 1 39 relay mechanism the roadside mechanism B includes the tripping element E which may be controlled in a manner such as that heretofore described in connection with Fig. 3, the tripping element E being controlled by a roadside circuit closed under clear track conditions and opened under caution and danger track conditions, the said circuit comprising the coil of the element E condenser 150, conductor 151, contact 152 under the control of distant relay D conductor 153, contact 154 under the control of a home relay T and conductor 155. It will be understood that under caution or danger track conditions with this circuit open the vehicle inductors a 72 and o are influenced to effect the effective deenergization of the relay mechanism F F or modifying the control 01 the relay mechanism under caution and danger track conditions, cooperative vehicle and roadside resetting means are employed operating as heretofore mentioned by change in the current characteristic in the roadside vehicle inductor means. The vehicle resetting means comprises an indication receiver H having a field 72 always energized from the generator G and connected to the conductors 111 and 119 by means of the conductors 156 and 157, and the armatures 7L6 and k arranged in series in a circuit including the conductor 15 the inductor element d conductor 159 inductor element 6 and conductor 160. The field and arinatures oi": the indication received H are so inter-related that when a current in phase with the current in the held it is passed through the arinaturcs 11 and h, the armatures will be moved or operated to close a contact 161 and to open a contact 162, and when the current in the rmatures h and IN is of a phase opposite to that in the held 72?, the contact 161 will be moved to an open position and the contact 162 will be moved to a closed position.

he contact 161 controls a reset partial circuit which is in parallel with the contact 125, the said partial circuit including the conductor 163, contact 161, and conductor 161. When the contact 161 is closed, it will. be so 1 t t the armatures f and 7 will be energized with an in phase current as explained with reference to the normal circuit for and f under clear conditions. Contact 162 controls a partial circuit for reseting the armature 7, the said partial circuit including the conductor 16%, contact 162, an d conductor 165, this partial circuit being therefore in parallel with the stick contat 135. When the contact 162 is closed, it will be understood that the armatures 7 and f are energized with an out of phase current as already explained with reference to the normal circuit for f and under caution conditions.

For selectively producing the in phase and out of phase currents in the armatures h and [L7 of the indication receiver H the roadside inductor means B includes resetting inductor elements inter-related to transmit impulses oi ditlerent characteristics to the vchicle carried inductors. The roadside resetting; elements include an inductor (0" arranged to receive energy from the enerizing inductors b and 0 and transmit ting inductor elements (Z and 6, arranged to cooperate respectively with the vehicle inductor elements (Z and c 'to transmit to the latter impulses received from the inductor element a The roadside inductor elements (r d and c are so inter-related that under clear roadside conditions the inductor element a will energize the inductor elements 6 and d with a current of one phase, and under cauti n track conditions will energize the said inductor elements with a current of an opposite phase. To produce this operat on the roadside inductor elements are inter-c n'ected by circuits controlled by a distant relay D and a home relay T the circuits in cluding the condenser 16?, conductor 168, front :11 d back contact points 169 and 170,

the front contact point being closed by the contact 171 when the relay D is energized, conductor 1'12, contact 178, conductor 17 1, 111- ductor element a conductor 175-, inductor cle ment d conductor 1763, contact 177, conductor 178, contact 119, front contact point 1150 conductor 181, and inductor element a, this circuit being operative under clear track conditions. Under caution track conditions the distant relay D is deenergized and the contact 179 makes with the baclr contact point 170, the contact 171 making with a hack contact point 182 connected to the con ductor 181,'the circuit connections between the inductor element a" and the inductor elements (Z and 6 being thereby reversed for producing in the inductor elements (Z and c an impulse of a phase opposite to that produced under clear track conditions. Under danger track conditions the home and di tant magnets T and D will both be deenergized, opening the contacts 177 and 173 with the result that no impulse is transmitted to the inductor elements (2 and d when the vehicle carried inductor means moves over the roadside inductor means.

Re'terring now to Fi x 6 of the drawings, we show a still further modification of our invention, the system shown in 6 being similar to that shown in Fig. 5 with the exceptions that av three-position relay mechanism and a three-position indication receiver means is provided in lieu of that shown in 5, the roadside mechanism including an inert magnetic elemen operating in a manner similar to the system shown in Fig. 2. The other parts of the system are similar to hat shown in 5 and are designated by similar reference characters.

In the system shown in 6 we employ a three-position relay mechanism designated as F including a field f and a single armature f", the said armature being operative to actuate the contacts 11a and 125 to closed position when the current in the armature f in phase with that in the field f and to operate the contacts 123 and 136 to closed position when the current in the armature f is 180 out of phase with that in the field f. The indication receiver H also comprises a three-position indicating means including a field 72/8 and an armature ii operative to actuate the contacts 161 and 162 in a manner similar to that heretofore describoc in con nection with the indication receiver H As mentioned the track element oi. the roadside inductor means comprises an inert element which is here designated as The operation of the systems shown in Figs. 5 and 6 will in the main be fully apparent from the above detailed description thereof, the operation of the system being generally similar to that described in detail in connection with Fig. 2, with the general or: ception that impulses or currents ot dili ereu phases are selectively transmitted to the vehicle carried inductors both for controlling the operation of the relay mechanism and for operating the resetting means.

While We have shown our device in the preferred forms, it will be obvious that many changes and modifications may be made in the structure disclosed Without departing from the spirit of the invention, defined in the following claims.

e claim:

1. In combination, vehicle carried mechanism, means for controlling the operation of the same including a vehicle carried energizing inductor and roadside mechanism for influencing the inductor to produce a controlling operation of said vehicle carried mechanism in the movement of the vehicle over a roadway, and neans for determining the further operation of the vehicle carried mechanism including cooperating vehicle and roadside inductors associated with so as to be energized by said vehicle energizing inductor.

2. In combination, vehicle carried mechanism, means for controlling the operation of the same including a vehicle carried energizing inductor, a vehicle carried source of energy therefor and roadside mechanism for influencing the inductor to produce a controlling operation of said vehicle carried mechanism in the movement of the vehicle over a roadway, and means for determining the further operation of the vehicle carried mechanism including cooperating vehicle and roadside inductors associated with so as to be energized by said vehicle energizing induct-or.

3. In combination, vehicle carried mechanism, means for controlling the operation of the same including a vehicle carried energizing inductor and roadside mechanism for influencing the inductor to produce a controlling operation of said vehicle carried mechanism in the movement of the vehicle over a roadway, and means for determining the further operation of the vehicle carried mechanism including vehicle impulse receiving and roadside impulse transmitting inductoriums and a roadside impulse receiving inductor arranged to receive energy from said energizing inductor and to transmit the same to the inductoriums.

l. In combination, vehicle carried mechanism, means for controlling the operation of the same including a vehicle carried energizing inductor and roadside mechanism for icriodically influencing the inductor to produce a controlling operation of said vehicle carried mechanism in the movement of the vehicle over a roadway, and means for perifluencing the inductor to produce a control ling operation of said vehicle carried mechanism in the movement of the vehicle over a roadway, and means for determining the further operation of the vehicle carried mechanism substantially when the said controlling operation is produced including cooperating vehicle and roadside inductors associated with so as to be energized by said vehicle energizing inductor.

6. In combination, vehicle carried mechanism including a normally closed operating circuit, means for holding the circuit closed including a vehicle carried energizing inductor, means effective for opening the circuit including roadside mechanism for influencing the inductor in the movement of the vehicle over a roadway, and means for determining the further operation of the said circuit including cooperating vehicle and roadside inductors associated with so as to be energized by said vehicle energizing inductor.

7. In combination, vehicle carried mechanism including a normally closed operating circuit, means for holding the circuit closed including a vehicle carried energizing inductor, means effective for opening the circuit including roadside mechanism for influencing the inductor in the movement of the vehicle over a roadway, and means for determining the further operation of the said circuit substantially when the opening means is effective including cooperating vehicle and roadside inductors associated with so as to be energized by said vehicle energizing inductor.

8. In combination, vehicle carried mechanism, means including a vehicle carried energizing inductor and roadside mechanism for influencing the inductor to produce a predetermined eflect in said vehicle carried mechanism in the movement of the vehicle over a roadway, and means for modifying the effect under given track conditions including cooperating vehicle and roadside inductors associated with so as to be energized bv'said vehicle energizing inductor.

9. In combination, vehicle carried mechanism, means including a vehicle carried energizing inductor and roadside mechanism for influencing the inductor to produce a danger effect in said vehicle carried mechanism in the movement of the vehicle over a roadway, and means for modifying the effect under safe track conditions to produce a pr0- ceed effect in said vehicle carried mechanism, said modifying means including cooperating vehicle and roadside inductors associated with so as to be energized'by said vehicle energizing inductor. V

10. In combination, vehicle carried mechanism, means for controlling the operation of the same including a vehicle carried energiz- 'ing inductor and roadside mechanism for infiuencing the inductor to produce a controlling operation of said vehicle carried mecha- -energizedby said'primary transformer coil.

nism in the movement of the vehicle over a roadway, and means for determining the further operation of the vehicle carried mechanism including a vehicle carried receiving inductor, a roadside transmit-ting inductor, a roadside receiving inductor arranged to be energized by the vehicle energizing inductor and roadside means operable in response to roadside conditions to connect and disconnect the roadside inductors.

11. In an inductive train control system, vehicle carried train control mechanism, means for producing a controlling operation in the same comprising a vehicle carried transformer including primary and secondary coils and a roadside mechanism for shunting the secondary coil when the transformer is moved thereover, and means for determining the further operation of the train control mechanism including cooperating vehicle and roadside inductors associated with so as to be energized by said primary transformer coil.

12. In an inductive train control system, vehicle carried train control mechanism, means for producing a controlling operation in the same comprising a vehicle carried transformer including primary and secondary coils, a vehicle carried source of energy therefor and a roadside mechanism for shunting the secondary coil when the transformer is moved thereover, and means for determining the further operation of the train control mechanism including cooperating-vehicle and roadside inductors associated with so as to be energized by said primary transformer coil.

13. In an inductive train control system, vehicle carried train control mechanism, means for producing a controlling operation in the same comprising a vehicle carried transformer having primary and secondary coils and a roadside mechanism for shunting the secondary coil when the transformer is *movedthereover, and means for determining the further operation of the train control mechanism including vehicle impulse receiving and roadside impulse transmitting inductoriums, and a roadside impulse receiving in- 'ductor arranged to receive energy from said primary transformer coil and to transmit such energy to the inductoriums.

14. In an inductive train control system, vehicle carried train control mechanism in- "cluding a normally closed operating circuit,

means for holding the circuit closed including a vehicle carried transformer having primary and secondary coils, means effective for opening the circuit including roadside mechanism for shunting the secondary coil when the transformer is moved thereover, and means for determining the further operation of the said circuit including cooperating vehicle and roadside inductors associated with so as to be 15. In an inductive train control system, vehicle carried train control mechanism, means including vehicle carried primary and secondary transformer coils and roadside mechanism for influencing the same to produce a predetermined effect in said vehicle carried mechanism in the movement of the vehicle over a road way, and means for modifying the effect under given track conditions, the said last mentioned means including cooperating vehicle and roadside inductors associated with so as to be energized by said primary coil.

16. In an inductive train control system, vehicle carried train control mechanism, means for controlling the operation of the same including a vehicle carried transformer having primary and secondary coils and road side mechanism for influencing the said coils to produce a controlling operation of said vehicle carried mechanism in the movement of the vehicle over a roadway, and means for determining the further operation of the vehicle carried mechanism including a vehicle carried receiving inductor, a roadside transmitting inductor, a roadside receiving inductor arranged to be energized by the primary coil of said transformer, and roadside means operable in response to roadside conditions to connect and disconnect the roadside inductors.

17. In an inductive train control system, vehicle carried mechanism, means for producing a controlling operation in said mechanism comprising a vehicle carried control relay, a vehicle carried transformer having an energlzing primary coil and a secondary coil, a vehicle carried circuit for the said relay and the secondary coil and a roadside mechanism for influencing the said transformer in the movement of the vehicle over a roadway; and means for determining the further operation of train carried mechanism comprising a vehicle carried indication receiver and cooperating vehicle and roadside inductors associated with so as to be energized by the primary coil of the transformer in the movement of the vehicle for operating the said indication receiver.

18. In an inductive train control system, vehicle carried mechanism, means for producing a controlling operation in said mechanism comprising a vehicle carried control relay, a vehicle carried transformer having an energizing primary coil and a secondary coil, a vehicle carried circuit for the said relay and the secondary coil and a roadside mechanism for influencing the said transformer in the movement of the vehicle to produce a controlling condition in said relay; and means for determining the further operation of said train carried mechanism comprising a reset circuit for said relay, an indication receiver for operating said resetcircuit and cooperating vehicle and roadside inductors associated With so as to be energized by the primary coil of the transformer in the movement of the vehicle for operating the indication receiver.

19. In an inductive train control system, vehicle carried mechanism, means for producing a controlling operation in said'mechanism comprising a vehicle carried control stick relay, a vehicle carried transformer having an energizing primary coil and a secondary coil, a vehicle carried normally closed circuit for the said relay and the secondary coil and a roadside mechanism for influencing the said transformer in the movement of the vehicle to trip said relay and open said circuit; and means for determining the further operation of said train carried mechanism comprising a reset circuit for said relay, an indication receiver for operating said reset circuit and cooperating vehicle and roadside inductors associated With so as tobe energized by the primary coil of the transformer in the movement of the vehicle for operating the indication receiver. 7

20. In an inductive train control system vehicle carried mechanism, means for producing a controlling operation in said mechanism comprising a vehicle carried control stick relay, a vehicle carried transformer having an energizing primary coil and a secondary coil, a vehicle carried normally closed circuit for the said relay and the secondary coil and a roadside mechanism for influencing the said transformer in the movement of the vehicle to trip said relay and open said circuit; and means for determining the further operation of said train carried mechanism comprising a reset circuit for said relay, an indication receiver for operating said reset circuit, vehicle impulse receiving and road side impulse transmitting inductoriums for operating the indication receiver and a roadside impulse receiving inductor arranged to receive energy from said primary transformer coil and to transmit the same to said inductoriums.

21. In an inductive train control system, vehicle carried mechanism, means for producing a controlling operation in said mechanism comprising a vehicle carried control re lay, a vehicle carried transformer having an energizing primary coil and a secondary coil, a vehicle carried circuit for the said relay and the secondary coil and a roadside mechanism for periodically influencing the said transformer in the movement of the vehicle to produce a controlling condition in said relay; and means for periodically determining the further operation of said train carried mechanism comprising a reset circuit for said relay, an indication receiver for operating said reset circuit and cooperating vehicle and roadside inductors associated With so as to be energized by the primary coil of the trans former in the movement of the vehicle for operating the indication receiver.

22. In an inductive train control system, vehicle carried mechanism, means for producing a controlling operation in said mechanism comprising a vehicle carried control relay, a vehicle carried transformer having an energizing primary coil and a secondary coil, a vehicle carried circuit for the said relay and the secondary coil and a roadside mechanism for influencing the said transformer in the movement of the vehicle to trip said relay; and means for determining the further operation of said train carried mechanism comprising a reset circuit for said relay, an indication receiver for operating said reset circuit, cooperating vehicle and roadside inductors associated with so as to be ener ized by the primary coil of the transformer in the movement of the vehicle for operating the indication receiver, and roadside means operable in response to roadside conditions for controlling the energization of said inductors.

23. In an inductive train control system, vehicle carried mechanism, means for producing a controlling operation in said mechanism comprising a vehicle carried control relay, vehicle carried inductively coupled coils, a vehicle carried circuit for said reley and one of said coils and a roadside mechanism for influencing the said coils in the movement of the vehicle over a roadway; and means for determining the further operation of the train carried mechanism comprising a reset circuit for said relay, a vehicle carried indication receiver for operating the reset circuit, cooperating vehicle and roadside inductors for operating the said indication receiver, and a vehicle carried source of energy for energizing the vehicle inductor by Way of the roadside inductor.

24. In an inductive train control system, vehicle carried mechanism, means for procucing a controlling operation in said mechanism comprising a vehicle carried control relay, vehicle carried inductively coupled coils, a vehicle carried circuit for said relay and one of said coils and a roadside mechanism for influencing the said coils in the movement of the vehicle over a roadway; and means for determining the further operation of the train carried mechanism comprising a reset circuit for said relay, a vehicle carried indication receiver for operating the reset circuit, and cooperating vehicle and roadside inductors for operating the said indication receiver.

25. In an inductive train control system, vehicle carried mechanism, means for producing a controlling operation in said mechahicle to trip the said relay; determining the further operation of the train carried mechanism comprising a reset circuit for said relay, an indication receiver for operating said reset circuit, cooperating vehicle and roadside inductors for operating the said indication receiver, and a vehicle source of energy for energizing the vehicle inductor by Way of the roadside inductor.

26. In an inductive train control system,

vehicle carried mechanism, means for producing a controlling operation in said mechanism comprising a vehicle carried control relay, a transformer having primary and secondary coils, a vehicle carried stick circuit for said relay and said secondary coil and a road-' side mechanism for influencing the said transformer in the movement of the vehicle to trip the said relay and means for determining the further operation of the train carried mechanism comprising a reset circuit for said relay, an indication receiver for operating said reset circuit and cooperating vehicle and roadside inductors for operating the said indication receiver. 27. In combination, vehicle carried mechanism, means for controlling the operation of the same including a vehicle carried inductor and roadside mechanism for influencing the inductor to produce a controlling operation of said vehicle carried mechanism in the movement of the vehicle over a roadway; and means for determining the further operation of the vehicle carried mechanism including cooperating vehicle and roadside inductors associated with so as to be energized by said first mentioned vehicle carried inductor.

28. In combination, vehicle carried mechanism, means for controlling the operation of the same including a vehicle carried inductor, a circuit therefor including a vehicle carried source of energy and roadside mechanism for influencingthe inductor to produce a controlling operation of said vehicle carried mechanism; and means for determining the further operation of the vehicle carried mechanism including vehicle impulse receiving and roadside impulse transmitting inductoriums and a roadside impulse receiving inductor arr nged to receive energy from said vehicle carried inductor and to transmit the same to the inductoriums.

29. In an intermittent inductive train control system, vehicle carried mechanism, means including a vehicle carried inductor, a circuit therefor including a vehicle carried source of energy, roadside mechanism for influencing the inductor to produce a predetermined effeet in said vehicle carried mechanism, and means for modifying the effect under given track conditions including cooperating vehicle and roadside inductors associated With so as to be energized by said first mentioned vehicle carried inductor.

and means for 30. In an inductive train control system, vehicle carried mechanism, means for producing a controlling operation in said mechanism comprising a vehicle carried control relay, means including a vehicle carried inductor and a roadside mechanism for influencing the said inductor in the movement of the vehicle over a roadway; and means for determining the further operation of the train carried mechanism comprising a vehicle carried indication receiver and cooperating vehicle and roadside inductors associated With so as to be energized by said vehicle carried inductor in the movement of the vehicle for operating the said indication receiver.

31. In an inductive train control system, vehicle carried mechanism, means for producing a controlling operation in said mechanism comprising a vehicle carried control relay, means including a vehicle carried inductor, a vehicle carried source of energy for energizing said inductor and a roadside mechanism for influencing the said inductor in the movement of the vehicle to produce a controlling operation in said relay; and means for determining the further operation of the train carried mechanism comprising a reset circuit for saidrelay, an indication receiver for operating said reset circuit and cooperating vehicle and roadside inductors associated With so as to be energized by the first mentioned vehicle carried inductor for operating the in dication receiver.

32. In an inductive train control system, vehicle carried mechanism, means for producing a controlling operation in said mechanism comprising a vehicle carried control stick relay, means including a vehicle carried inductor, a vehicle carried source of energy for energizing said inductor and a roadside mechanism for influencing the said inductor in the movement of the vehicle to trip said relay; and means for determining the further operation of the train carried mechanism comprising a reset circuit for said relay, an indication receiver for operating said reset circuit and cooperating vehicle and roadside inductors associated with so as to be energized by the first mentioned vehicle carried inductor for operating the indication receiver.

33. In an inductive train control system, vehicle carried mechanism, means for producing a controlling operation in said mechanism comprising a vehicle carried control relay, means including a vehicle carried in ductor, a vehicle carried source of energy for energizing said inductor and a roadside mechanism for influencing the said inductor in the movement of the vehicle to trip said relay; and means for determining the further operation of the train carried mechanism comprising a reset circuit for said relay, an indication receiver for operating said reset circuit, cooperating vehicle and roadside inductors associated With so as to be energized by the first mentioned vehicle carried inductor for operating the indication receiver and roadside means operable in response to roadside conditions for controlling the energization of said inductors.

34. In combination, vehicle carried mechanism selectively operable for producing different train control eii'ects, means for controlling the operation of the same including a vehicle carried inductor and roadside mechanism for influencing the inductor to produce a controlling operation in said vehicle carried mechanism in the movement of the ve hicle over a roadway, and means for selectively determining the further operation of the vehicle carried mechanism including a plurality of vehicle carried inductors and a plurality of roadside inductors cooperating therewith and associated with so as to be energized by said first mentioned vehicle carried inductor.

35. In combination, vehicle carried mechanism selectively operable for producing different train control effects, means for controlling the operation of the same including a vehicle carried energizing inductor and roadside mechanism for influencing the energizing inductor to produce a controlling operation of said vehicle carried mechanism in the movement of the vehicle over a roadway, and means for selectively determining the further operation of the vehicle carried mech anism including a plurality of vehicle carried inductors and a plurality of roadside inductors cooperating therewith and associated with so as to be energized by said vehicle carried energizing inductor.

36. In combination, vehicle carried mechanism selectively operable for producing different train control efi 'ects, means for controlling the operation 01 the same including a vehicle carried energizing inductor and roadside mechanism for influencing the inductor to produce a controlling operation of said vehicle carried mechanism in the movement of the vehicle over a roadway, and means for selectively determining the further operation of the vehicle carried mechanism including a plurality of vehicle carried impulse receiving inductors, a plurality of roadside impulse transmitting inductors cooperating therewith and a roadside receiving inductor arranged to be energized by said energizing vehicle carried inductor and to selectively transmit energy to the other inductors.

37. In combination, vehicle carried mechanism selectively operable for producing different train control eil'ects, means for controlling the operation of the same including a vehicle carried inductor and roadside mech anism for periodically influencing the inductor to produce a controlling operation of said vehicle carried mechanism in the movement of the vehicle over a roadway, and means for periodically selectively determining the further operation of the vehicle carried mechanism including a plurality of vehicle carried inductors and a plurality of roadside inductors cooperating therewith and associated with so as to be energized by said first mentioned vehicle carried inductor.

38. In combination, vehicle carried mechanism selectively operable for producing different train control ell ects, means for controlling the operation of the same including a vehicle carried inductor, a vehicle carried source of energy for energizing the same and roadside mechanism for influencing the inductor to produce a controlling operation of said vehicle carried mechanism in the movement of the vehicle over a roadway, and means for selectively determining the further operation of the vehicle carried mechanism substantially when the controlling operation therein is produced including a plurality of vehicle carried inductors and a plurality of roadside inductors cooperating therewith and associated with so as to be energized by said first mentioned vehicle carried inductor.

39. In combination, vehicle carried mechanism selectively operable for producing different train control eiiects, means for controlling the operation of the same including a vehicle carried inductor and roadside mechanism for influencing the inductor to produce a controlling operation of said vehicle carried mechanism in the movement of the vehicle over a roadway, and means for selectively determining the further operation of the vehicle carried mechanism including a plurality of vehicle carried inductors, a plurality of roadside inductors cooperating therewith and associated with so as to be energized by said first mentioned vehicle carried inductor, and means selectively operable in response to roadside conditions for controlling the energization of the roadside inductors.

40. In combination, veh cle carried mechanism selectively operable for producing different train control effects in accordance with different track conditions, means for controlling the operation of the vehicle carried mechanism including a vehicle carried inductor, a vehicle carried source of energy therefor and roadside mechanism for influencing the inductor to produce a controlling operation of said vehicle carried mechanism in the movement of the vehicle over a roadway, and means operable in response to roadside conditions for selectively determining the operation of the vehicle carried mechanism including a plurality of vehicle carried impulse receiving inductors, a plurality of roadside impulse transmitting inductors cooperating therewith, a roadside impulse receiving inductor associated with so as to be energized by said first mentioned vehicle carried inductor-and changeable circuit con rnections between the roadside inductors.

- 41;. Incombination, vehicle carried mechanism selectively operable for producing different train control effects, means for controlling the operation of the same including 7 a vehicle carried inductor,

a vehicle carried source of energy therefor and roadside mechanism for influencing the inductor to produce a controlling operation of said vehicle carried mechanism in the movement of the vehicle over a roadway,'and means for selectively determining. the further operation of the vehicle carried mechanism including a plurality of vehicle carried'impulse receiving inductors, a plurality of roadside impulse transmitting inductors cooperating therewlth, a roadside impulse receivmg lnductor associated with so as to be energized bysaid first mentioned vehicle carried inductor, a circuit connectingsaid roadside inductors and pole changing and .make and breakmeans in said circuit.

v further operation of the vehicle carried mechroadside inductors cooperating and assoclated wlth so as to be energized by the primary of the transformer.

.anism including .nism selectively operable for-producing a plurality of vehicle carried inductors and a. plurality of roadside inductors cooperating therewith and associated with so as to be energized by said primary transformer coil.

48. In combination, vehicle carried mechanism selectively operable-for producing different train control effects, means for controlling the operation of. the same including a vehicle carried three element transformer havmg primary and secondary coils and roadside .mechanism for shunting the secondary when the transformer is moved thereover, .minmg .the. further and means for selectively deteroperation of the vehicle carried: mechanism including a plurality of vehiclecarried inductorsand a plurality of therewith 44. In combination, vehiclecarried mechadifferent train control efiects, means for con trolling the operation of the same including a vehicle carried transformer having primary and secondary coils and-roadside mechanism for shunting the secondary coil when the transformer is moved thereover, and means for selectively determining the further operation of the vehicle carried mechanism including a plurality of ceiving inductors, a plurality of roadside impulse transmitting 'lay mechanism, vehicle carrled impulse re inductors cooperating therewith and a roadside impulse receiving inductor associated with so as to be energized by said p imary transformer coil.

45. In combination, vehicle carried mechanism selectively operable for producing different train control effects, means for controlling the operation of the same including a vehicle carried transformer having primary and secondary coils and roadside mechanism for shunting the secondary coil when the transformer is moved thereover, and means for selectively determining the further operation of the vehicle carried mechanism including a plurality of vehicle carried inductors, a plurality of roadside inductors cooperating therewith and associated with so as to be energized by said primary transformer coil and means selectively operable in response to roadside conditions for controlling the energization of the roadside inductors.

46. In combination, vehicle carried mechanism selectively operable for producing different train control effects, means for controlling the operation of the same including a vehicle carried transformer having primary and secondary coils and roadside mechanism for shuntingthe secondary coil whenthe tr ansformer is moved thereover, and means for selectively determining the further operation of the vehicle carried mechanism including a plurality of vehicle carried impulse receiving inductors, a plurality of roadside impulse transmitting inductors coop crating therewith, a roadside impulse receiving inductor associated with so as to be energized by said primary transformer coil and changeable circuit connections between the roadside inductors.

47. In an inductive train control system, vehicle carried mechanism selectively op'erable for producing different train control effects comprising a vehicle carried control relay mechanism, a vehicle carried inductor associated with said relay mechanism and a roadside mechanism for influencing thesaid inductor in the movement of the vehicle to produce a controlling operation in said relay mechanism; and means for selectively determining the further operation of the relay mechanism comprising reset circuits for. said relay mechanism, an indication receiver means selectively operable for operating said reset circuits, a plurality of vehicle carried inductors for said indication receiver means and a plurality of roadside inductors cooperating therewith and associated with so as to be energized by said first mentioned vehicle carried inductor.

48. In an inductive train control system, vehicle carried mechanism selectively operable forproducing different train control effects comprising a vehicle carried control rea vehicle carried transformer having primary and secondary coils associated with'said relay mechanism and a'roadside mechanism for influencing the said transformer coils in the movement of the vehicle to produce a controlling operation in said relay mechanism; and means for selectively determining the further operation of the relay mechanism comprising reset circuits for said relay mechanism, an indication receiver means selectively operable for operating said reset circuits, a plurality of vehicle carried inductors for said indication receiver means and a plurality of roadside inductors cooperating therewith and associated with so to be energized by said primary transformer coil.

49. In an inductive train control system, vehicle carried mechanism selectively oper able for producing diiierent train control estfects comprising a plurality of stick circuits, a vehicle carried control relay mechanism therefor, a vehicle carried inductor associated with said circuits for selectively energizing the same and a roadside mechanism for influencing the said inductor in the movement of the vehicle to selectively deenergize the circuits; and means for selectively determining the further condition of the circuits comprising reset circuits for said relay mechanism, an indication receiver means selectively operable for operating said reset circuits, a plurality of vehicle carried inductors for said indication receiver means and a plurality of roadside inductors cooperating therewith and associated with so as to be energized by said first mentioned vehicle carried inductor.

50. In an inductive train control system, vehicle carried mechanism selectively operable for producing different train control effects comprising a vehicle carried control relay mechanism, a vehicle carried inductor having primary and secondary coils associated with said relay mechanism and a roadside mechanism for influencing the said inductor in the movement of the vehicle to produce a controlling operation in said relay mechanism; and means for selectively determining the further operation of the relay mechanism comprising reset circuits for said relay mechanism, an indication receiver means selectively operable for operating said reset circuits, a plurality of vehicle carried impulse receiving inductors for said indication receiver means, a plurality of impulse transmitting roadside inductors cooperating therewith and an impulse receiving roadside inductor associated with so as to be energized by the primary coil of said first mentioned vehicle carried inductor.

51. In an inductive train control system, vehicle carried mechanism selectively operable for producing different train control effects comprising a vehicle carried control relay mechanism, a vehicle carried inductor associated with said relay mechanism and a roadside mechanism for influencing the said inductor in the movement of the vehicle to produce a controlling operation in said relay mechanism; and means for selectively determining the further operation of the relay mechanism comprising reset circuits for said relay mechanism, an indication receiver means selectively operable for operating said reset circuits, a plurality of vehicle carried impulse receiving inductors for said indication receiver means, a plurality of impulse transmitting roadside inductors cooperating therewith, an impulsereceiving roadside inductor associated with so as to be energized by said first mentioned vehicle carried inductor and changeable circuit connections between the roadside inductors.

52. In combination, electromagnetic vehicle carried mechanism, means for controlling the operation of the same including vehicle carried energizing and energy receiving inductors and roadside mechanism for influencing the inductors to produce a controlling operation of said vehicle carried mechanism in the movement of the vehicle over a roadway, and electro-manually controlled means for determining the further operation of the electromagnetic vehicle carried mechanism, said electro-manually controlled means being capable of being setonly when the speed of the vehicle is reduced to a predetermined rate.

53. In combination, electromagnetic vehicle carried mechanism, means for controlling the operation of the same including vehicle carried energizing and energy receiving inductors and roadside mechanism for influencing the inductors to produce a controlling operation of said vehicle carried mechanism in the movement of the vehicle over a roadway, and electro-manually controlled means for restricting the operation of the electromagnetic vehicle carried mechanism, said electro-manually controlled means being capable of being set only after the speed of the vehicle is reduced to a predetermined rate.

54. In combination, vehicle carried mechanism, means for controlling the operation of the same including a vehicle carried energizing inductor and roadside mechanism for influencing the inductor to produce a controlling operation of said vehicle carried mechanism in the movement of the vehicle over a roadway, and manually operated electro-magnetic stick means for determining the further operation of the vehicle carried mechanism efiective in continuing the vehicle under a predetermined rate of speed after the speed of the vehicle is reduced to said rate.

Signed at Niagara Falls, in the county of Niagara and State'ot New York, this 18th day of April, A. I). 1923.

ARCHIBALD G. SHAVER. FRED M. ROSENZWEIG.

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