US1801974A - Remote-control apparatus - Google Patents

Description

April 21, 1931.

J. M. PELIKAN REMOTE CONTROL APPARATUS Original'Filec1- Jan. 2 Sheets-Sheet 2 M ATTORNEY l T E s'rATEs PATENT; OFF! JOHN M. PELIKAN, or PITTSBUR H,'rENNsYLvANLA; ASSIGNOR TO THE UNIoN swrrcn- A & SIGNAL coi/rrANY, or swIssvALE, PENNSYLVANIA, A CORPORATION or PENNe SYLVANIA r REMOTE-CONTROL ArrARA'ros Application filed January 31, 1929, Serial Nb.336,427. Renewed September 26', 1930.

My invention relates to remote control apparatus, and particularly to apparatus for safety controlling traffic governlng'devices, such as railway switches, from a distant point.

One feature of my nvention 1s the provision of means for controlling by current of a given character supplied to one pair of conductors, a switch and associated signals, a switch indication, and three track circuit indications.

I will describe one form'of'apparatus embodying my invention,'and will then point out the novel features thereof in claims.

The accompanying drawings, Figs. 1 and 2, when placed side byside, with Fig. 1 on the' left, constitute a diagrammatic view showing one form of apparatus embodying my in- Vention.

Referring to the drawings, the reference character X designates a stretch of main railway track connected with a siding Y by a switch F. The rails land 1a of stretch X are divided by insulated rail joints 2 into track sections A -B, B C, and CD; Each of the sections AB, B@ and CD is provided with a track circuit which is supplied with current by a battery 3 connected across the rails adjacent one end of thesection, and 1 with a track relay' G3, G2 or G1, respectively, connected across the rails adjacent the oppo-' site end of the section. Sections AVB and CD are known as approach sections, and their circuits are known as approach track circuits. Section B-C is known asa detector section, and its circuit is known as a de tector track circuit.

Slow releasing track circuit repeater relays g1 and 93 are controlled by front contacts of track relays G1 and G3 respectively. An approach indication relay T is controlled by one circuit passing through a back contact of relay G1 in series with a front contact of relay g1, and by a second circuit passing through a back contact of relay G8 in series with a front contact of relay g3.

Signals S1, S2, S3 and S4 govern the movement of traffic over switch F which inits normal position directs trafic moves over 7 stretch X only, and which in its reverse posiback contact of relay P.

tion directs moves over stretch X to or frombut such controls, forming no part of my Q invention, are omitted from vthe drawings.

Switch F, as here shown, is operated by a motor M comprising an armature 5 and a' field winding 6, WlllCh is controlled in the normal direction by a slow releasing relay A hi and in the reversedirection b a slow releasing'relay k2. Relayhl is intu'rn controlled by a front neutral and a normal polar contact of a slow releasing polarized relay H, and relay b2 is controlled by a front neutral and a reverse polar contact of relay H. A circuit controller designated by the reference character a is operated in conjunction with switch'F. Circuit controller a is pro Vided with a contact 131 which connects with a segment" 131a at all times except while switch Flis in its reverse position, and which connects with'a segment 1816 at all times except while switch F is in its normal position. Circuit controller a is also provided with a contact 32 which, while switch F is in itsnor-' mal position, is in contact with a terminal 32a, and while switch F is in itsreverse posi tion, is in contact with a terminal 32?).

A polarized switch indicationrelay K' is controlled in the normal direction by switch F in its normal position, and in the reverse direction by switch F inits reverse position. A slow pick-up relay '1? is controlled by a front neutral contact of relay 'K. Asecond switch indication relay I is controlled by a front contact of relay Kin series with a Switch control relay His controlledover a pairof conductors and 64 by a lever V which may be included in a groupwith other similar levers in a control station such as a train despatchersoflice. Lever V has a normalposition N, and a reverse position to the left designated by the reference character L, and a reverse position to the right designated by the reference character R. To energize relay H in the'normal direction, lever V is operated to its L position, and to energize relay H in the reverse direction, lever V is operated to its R position. Lever V is provided with seven contacts, 119, 52, 117, 49, 150, 172 and 83. Contacts 117, 119 and 150 are closed while lever V is in its R position only, contacts 49, 52 and 172 are closed while lever V is in its L position only, and contact 83 is closed while lever V is in its N position only.

Associated with lever V in the control staiion, are an approach indication relay E1, a detector circuit and switch indication relay E2, and a switch indication relay E3. Relay E3 is of a polarized type which when de-energized retains its contacts in the closed position corresponding with that controlled by the last previous direction of energize.- tion of the relay. Contact 153 of relay E3 connects with terminal 153a when relay E3 is energized by current flowing through contact 172 of lever V, and since, with switch F in its normal position, lever V has been operated to its L position nest preceding its operation to its N position, contact 153 continues connected with terminal 153 while lever V is in its N position. Approach and detector circuit indication apparatus and switch indication apparatus are designated by the reference character (2 with distinguishing suflixes, and as here shown are electric lamps. The approach indication lamps cg1 and eg3 are controlled by relay E1, detector circuit indication lamp eg2 is conirolled by relay E2, and switch indication lamps cfl and ef2 are controlled by relay E3.

Current is supplied to conductors and 64 and to the indication lamps by batteries Q1 and Q2 which are located adjacent lever V. Conductors 55 and 64 are also at times supplied with current by batteries Q3 and Q4 which are located adjacent switch F, and which also supply current for the operation of switch F. Resistance units 4 and 7 are employed to prevent the possibility of short circuits being caused by the de-energization of relays G1 and G3 at approximately the same time.

Having thus described, in general, the arrangement and location of the various constituent parts comprising my invention, 1 will now proceed to explain the operation of the apparatus.

As shown in the drawings, all parts are in their normal condition, that is, lever V is in its N position, track sections A B, BC and C-D are unoccupied, switch F is in its normal position for moves over stretch X only, and signals S1, S2, S3 and S4 are indicating stop. Contact 153 of relay being connected with terminal 153a, normal switch indication lamp ef2 is lighted by a circuit passing from battery Q2, through wires 42, 43 and 44, contact 153-153a, wire 45, filament of lamp ef2, and wires 46, 47 and 48 back to battery Q2. lVith relay G1 energized, relay g1 is energized by its circuit passing from terminal 13 of battery Q4, through wires 14, 15 and 16, contact 17 of relay G1, wire 18, winding of relay g1, and wires 19, 20, 21, 22, and 23 to terminal 11 which is common to batteries and Q4. With relay G3 energized, relay g3 is energized by a similar circuit passing from terminal 13 of battery Q4, through wires 14, 15 and 24, contact 25 of relay G3, wire 26-, windng of relay 93, wires 27,20, 21, 22 and 23 to terminal 11. Since switch F is in its normal position, relay K is energized. in the normal direction by a circuit passing from terminal 11, through wires 23, 22 and 28, winding of relay K, wire 29, contact 30 of relay T, wire 31, contact 3232a of circuit controller a, and wire 33 to battery Q3. \Vith relay K energized, relay P is also energized by a circuit passing from terminal 11, through wires 23 and 34, winding of relay P, wire 35, contact 36 of relay K, and wires 37 and 38 to battery Q3.

I will assume that, with all parts thus in their normal condition, a train approaching switch F from the west, that is, from the left, as shown in the drawin s, deenergizes relay G3. Relay T is then energized in the reverse direction by a circuit passing from terminal 11, through wires 23, 22, 21 and 174, winding of relay T, wires 175 and 176, resistance unit 7, contact 156 of relay 3 wire 157, contact 158 of relay G3, and wires 159, 37 and 38 to battery Q3. Even though the opening of track relay G3 opens at contact 26 the circuit for relay 93, the latter relay does not release for a short interval of time because it is slow releasing in character. Helay T, being thus energized, completes, through its contact a, a circuit through the winding of approach indication relay E1 in the control station, this circuit passing from terminal 11, through wires 23, 22, 28 and 39, contact 885 of relay I, wires 87 and 86, contact of relay H, wires 84 and 64, contact 83 of lever V, wires 82 and 54, winding of relay El, wire 55, contact 56 of relay G2, wire 57, contact 58?) of relay I, wire 59, contact 60a of relay T, wires 81 and 114, contact 80 of relay H, wire 79, resistance unit 4, wire 96, contact 97 of relay g3, wire 98, contact 99 of relay G3, and wire 100 to terminal 10 of battery Q3. Relay E1 is now energized in its normal direction, and hence lamp 093 is lighted by a circuit passing from battery Q2, through wires 42, 43, 44 and 89, contacts and 91a of relay E1, wire 101, filament of lamp 693, and wires 102, 46, 47 and 48 back to battery Q2. After the lapse of sutlicient time following the opening of the circuit of relay 93 by contact 25 of relay G3, relay g3 opens its contacts 97 and 156, thereby (lo-energizing relays E1 and T, respectively. Relay E1 then opens its contact 90, breaking the circuit and extinguishing the light of lamp 693.

ibis

I will assume that with all parts again in their normal condition, as previously described, a westbound train approaching switch F de-energizes relay G1.: Relay G1,

by closing itsback contact'103, causes the en ergization of relay T in the normal direction by a circuit passing from terminal 13 of battery Q4, through wires 14, 15 and 16, contact 103 of relay G1, wire 104, contact 105 of relay gl, resistance unit 7, wire 175, winding of relay'T, and wires 174, 21, 22 and 23 to terminal 11. Relay T, through its contact a,

now completes a circuit in the reverse direction through the winding of relay E1, this circuit passing from terminal 12 of battery 4, through wire 74, contact 75 of relay G1, wire 76, contact 77 of relayg1, resistance unit 4, wires 78 and 79, contact 80 of relay H,-

wires 114 and.81, contact 60a of: relay T, wire 59, contact 586 of relay I, wire 57,-contact 56 of relay G2,wire 55, windingof relay E1, wires 54and:82,rcontact 83 of lever V, wires64 and 84, contact 85 of relay H, wires 86 and 87, contact 886 of relay I, and wires 39,28, 22 and .23 to terminal 11. Re-

lay El, being energized'in its reverse direc tion, causes lamp 691 to be lighted by a circuit passing from battery Q2, through wires 42, 43, 44 and 89, contacts 90 and 91b of relay E1, wire 92, filament of lamp 691, and wires 93, 94, 95, 47 and 48 back to battery Q2. After the lapse of sufucient time for relay 91 to open its front contacts following the de-energization of relay G1,. relay T again becomes de-energized, by the opening of contact" 105 of relay 91, causing relay E1 to become de-energ'med and extinguish the light of lamp egl.

I will now assume that, with all parts i again in their. normal condition, the dispatcher desires to permit a traincto move over switch F in its normal position He therefore operates lever V to its L position, completing a circuit in the normal direction through relay H, this circuit passing from battery Q2, through wire 42, contact49 0f lever V, wire 50, winding of .relayE2, wire; 51, contact 52 of lever V, wires 53 and 54,"

winding of relay E1, wire 55, co-ntactj'56 of I relay G2, wire 57 contact 58?) of relay 1,-

wiref59, contact 605 of relay T, wire 61,

winding of relay H, and wires 62, 64 and 65; back to battery Q2. Relay H,now"being en-- ergized in its normal direction, causes relay I 7L1 to be energized by its circuit passing from terminalf13 of battery Q4, throughwires 66 and 67, contacts 68 and 69a, of relay H, wire 70, contact 71 of relay k2, wire 7 2, winding of relay 7L1, and wires 73 and 23 to terminal 11. RelayE2, as well as relayH is operated by the circuit traced through the winding of relay H, closing the circuit of detector indicator lamp 692 passing from battery Q2,

through wires 42 and 43, contact 143 of relay E2, wire 144, filament of lamp eg2, andwires 94,95, 47 and 48 back to battery Q2. While relaysHandE2 are operated by the circuit through the windings of these relays, the current flowing inthis circuit is not of sufficient magnitude to operate relay E1. When the front and normal contacts of relay Hare closed While switch F is in its normal posi+.

tion, the arms of signals S2 and S3 are operated to the proceed position. c

When an eastbound train approaches switch F whilelever V is in its L position, de-energizlng relay G3,.the reverse control circuit for relay T becomes closed by contact 158 of relay G3 as previously described. Re-

lay T being energized in itsreverse direction,

the circuit for relay His opened at contact 606 of relay T, and an approach indication control circuit is closed, passing from battery Q2, through wire 42, contact 49 of lever V, wire 50, winding of relay E2, wire 51,

contact 52 of lever V, wires 53 and 54, Winding of relay-E1, wire 55, contact 56 of relay G2, wire57, contact 586 of relay 1, wire 59, contact 60a of relay T, wire 81, contact 113 of relayT, wire 112, contact 111 of relayH,

wire 110, contact 1096 of relay T, wire 115, contact 116a of relay H, and wires64and 65 back to battery Q2. The current flowing in this circuit is of sufiicient magnitude to op-,

erate relay E1 as Well as relay E2, and hence lamp 693 becomes lighted by its circuit as previously traced. After the lapse of suflicient time'following the de-energization of relay G3, relay 93 opens its-contact 156,

causing relay T to in turn-become de-energized. Relay E1, at" its contact 90,-;then

opens the circuit of lamp e93, Relay H, lief ng of a slow releasing type, .does not open. its front contacts/during the open period of contact 60b ofrelay T, when relay T is energizedas just described. 1

. If, with, all track sections again clear and with lever V in its L position, an approaching westbound train deenergizes relay G1,

relay T becomesenergized in its normal dircctionby its circuit passing through con tact 1031 of relay G1 as previously described. 1th relayT energized in its normal direction, the circuit for. relay H is again open at contact 605 of relay T, and a second approach indication circuit is closed, passing llO from terminal 13 of battery Q4, through wires 14, 15 and 16, contact 103 of relay G1,

wire 104, contact 105. of relay g1, wire106, contact l07aof relay H, Wire 108,.contact 109a of relay T, wire 110, contact 111 of relay H, wire112, contact 113 of .relay T, wire 81, contact 60a of relay T, wire 59, contact be noted that, in the circuit just traced, batteries Q3 and Q4 in series oppose battery The combined potentials of batteries Q3 and Q4 are suificiently in excess of the potential of battery Q2 to send current through this circuit in opposition to battery Q2 and of suflicient magnitude to operate relay E1 in the reverse direction. Lamp 091 then becomes lighted for a brief 2 period by its circuit as previously described.

As a train approaching switch F proceeds into section BC, tie-energizing relay G2, the main circuit which operates relays E2 and H is opened at contact 56 of relay G2. Relay E2, upon becoming de-energized, opens the circuit of lamp e92, extinguishing the light of this lamp and thereby showing to the dispatcher that the detector section is occupied. The de-energization of relay H causes the arms of signals S2 and S3 to be returned to the stop position.

I will assume that, when all track sections are again unoccupied, the dispatcher desires to send a train from stretch X over switch F to siding Y or in the reverse direction from sidin Y over switch F to stretch X. He there ore operates lever V to its R position, causing current to be supplied to relay H in the reverse direction by a circuit passing from batter Q1, through wires 48, 65, 64 and 62, win ing of relay H, wire 61, contact 606 of relay T, wire 59, contact 586 of relay I, wire 57, contact 56 of relay G2, wire 55, winding of relay E1, wires 54 and 53, contact 117 of lever V, wire 50, winding of relay E2, wire 118, contact 119 of lever V,and wire 120 back to battery Q1. The current flowing in this circuit passes through relay E2 in the same direction as the current in the circuit which is closed while lever V is in its L position, but in the reverse direction through relays Eland H. Relay E2 is thus again energized in its normal irection, causing lamp 0312 to become lighted, and retaining its contact 147 in the open position. The current flowing in the circuit is of insufficient magni-' tude to operate relay E1. Relay H, now being energized in its reverse direction, completes a circuit for relay 71.2 passing from terminal 13 of'battery Q4, through wires 66 and 67, contacts 68 and 69b of relay H, wire 121, contact 122 of relay b1, wire 123, winding of re- In 11 2. and wires 124, 73 and 23 to terminal'11.

With relay h2 energized, the reverse operating circuit for motor M becomes closed, passing from terminal 13 of battery Q4, through wires 66 and 125, contact 126 of relay h2, wire 127, armature 5 of motor M, wire 128, contact 129 of relay k2, wire 130, contact 131a-131 of circuitcontroller a, wire 132, field winding 6 of motor M, and wire133 to battery Q3. Motor M now operates switch F to its reverse position, and opens contact -131-1.31a thereby deenergizing motor M.

During the operation of switch F from its normal to its reverse position, the circuit for relay K through contact 3232a of circuit controller a is opened when the switch leaves its normal position, and the reverse control circuit for relay K becomes closed through contact 326-32 of circuit controller a upon the completion of the stroke of switch F. The reverse control circuit thus closed for relay K passes from terminal 13 of battery Q4, through wire 134, contact 32b-32 of circuit controller a, wire 31, contact 30 of relay T, wire 29, winding of relay K, and wires 28, 22 and 23 to terminal 11. Relay K is thus energized in its reverse direction.

During the de-energization of relay K, relay P, being de-energized by the o ening of contact 36 of relay K, has closed its liack contact 41. Upon the re-energization of relay K, a circuit becomes closed for relay 1, passing from battery terminal 11, through wires 23, 22, 28 and 39, winding of relay 1, wire 40, contact 41 of relay P, wire 35, contact 36 of relay K, and wires 37 and 38 to battery Q3. Relay P, having a slow pick-up, does not open its contact 41 until a short interval of time has elapsed after relay I has been energized. In the meantime, with the front contacts of relay I closed, a switch indication circuit has been completed, passing from terminal 13 of battery Q4, through wires 14 and 135, contacts 136?; and 137 of relay K, wire 138, contact 88a of relay I, wires 87 and 169, contact 1651) of relay T, wires 63, 64, 65 and 48, battery Q1, wire 120, contact 119 of lever V, wire 118, winding of relay E2, wire 50, contact 117 of lever V, wires 53 and 54, winding of relay E1, wire 55, contact 56 of relay G2, wire 57, contact 58a of relay 1, wire 139, contacts 140 and 141b of relay K, and wire 142 to terminal 9 of battery Q3.

In the circuit just traced, the battery potential between terminals 9 and 13 sends current inopposition to battery Q1 and of sufficient magnitude to operate relay E2 in the reverse direction but not to operate rela E1. With relay E2 operated in the reverse irection, the reverse operating circuit for relay E3 becomes closed, passing from battery Q2, through wires 42, 43, 44 and 89, contact 145 of relay E1, wire 146, contacts 147 and 148 of relay E2, wire 149, contact 150 of lever V, wire 151, the right-hand terminal of the winding of relay E3, through the right-hand portion of the winding of relay E3, and wires 152, 95, 47 and 48 back to battery Q2.

Relay E3 then closes contact 153-153b, causing lamp efl to be lighted by a circuit passing from battery Q2, through wires 42, 43 and 44, contact 153-153b of relay E3, wire 154, filament of lamp cfl, and wires 95, 47 and 48 back to battery Q2. After the lapse of a brief period of time, relay P opens its contact 41, thus de-energizing relay I which then, by its contact 586, again. completes the reverse circuit for relay H, causing relay E2 to again become energized in its normal direction and open its contact 147 de-energizing relay E3 which, however, as already stated, does not open its contacts when it is de-energized. Lamp efl therefore. continues lighted.

When switch F has been operated to its reverse position and while the front andreverse contacts of relay H are closed, the arms of signals S1 and S4 are operated to their proceed position. i

It now an approaching westbound train de-energizes relay G1, another. approach in,- dication circuit is completed by relay T which becomes energized in its normal direction as previously described. The approach indication circuit which is now closedpasses frombattery Q1, through wires 48, 65, and

64, contact 1076 of relay H, wire 108, contact 109a of relay T, wire 110, contact 111 of relay H, wire 112, contact 113 of relay T, wire 81,'contact a of relay T, wire 59, contact 586 of relay 1, wire 57, contact 56' of relay G2, wire '55, winding of relay E1, wires 54 and 53, contact 117 of lever V, wire 50, winding of relay E2, wire 118,.contact 119 of lever V, and wire .120 back to battery Q1. With relay H now removed from the circuit, battery Q1 supplies sufficient current to 0perate relay E1 in its reverse direction as well as relay E2in its normal direction. Lamp cgl therefore becomes lighted for a brief period as previously described.

When all the track sections are again unoccupied while lever V is in its R position, an eastbound train de energizing relay G3 causes relay T to'become energized in the reverse direction andto complete still another ap'-' proach indication circuit. This approach indication circuit passes from terminal 13 of battery Q4, through wires 66 and 125, con-- tact 170 of relay 62, wire 171, contacts 1666 and165a of relay T, wires 63, 64, and 48,

battery Q1, wire 120, contact=119 -ot lever V, wire 118, winding otrelay E2, wire 50, con tact 117 of lever V, wires 53 and 54,winding of relay E1, wire 55, contact 56 of relay G2,

wire 57, contact 586 of relay'I, wire'59, contact 60a of relay T, wire 81, contact v113 of relay T, wire 112, contact 111 of relay H,wire 110, contact 1096 of relay T, wire 115, contact 1166 of relay H, wire 155,v contact 1560f relay g3, wire 157, contact 1580f relayG3, and wires 159, 37 and 38 to battery Q3. .Batteries Q3 and Q4now supplysufiicient current through this circuit in opposition to battery Q1 to operate relay E1 in the normal direction as well as relay E2 in the reverse direction; Lamp eg3 thereupon becomes lighted for a brief period as previously described.

If, when all the track sectionsare again unoccupied the dispatcher desires to return switch a its normal-positiomfhe returns lever V to its L position thus again closing the normal control circuit for relay H and causing the armsof signals S1 and S4 to be returned to the stop position. Relay H, uponbeing energized in its normal direction, causesrelay 7L1 to .become energized by its circuit previously traced. Relay 61, upon becoming energized, completes the normal operating circuit for motor M, passing from terminal 13 of battery Q4, through contact 160 of relay 6 1,.wire 161, armature 5 of motor M, wire 162, contact 163 of relay 61, wire 164, contact 1316131 of circuit controller a, wire 132, field winding 6 of motor M, and wire 133 to battery Q3. Motor M then returns switch F to its normal position. Upon completion of this operation of switch F, contact 1316-131 is opened, breaking the motor circuit. Y

During the operation of switch F from its reverse to itsnormal position, the reverse control circuit forrelay K is opened at contact 326-32015 circuit controller a when the switch leaves itsreverse position, and the normal control circuit previously traced for relay K becomes closed through contact 3232a-of circuit controller a upon the completion of theoperation of switch F. Upon the re-energ'ization of relay K in its normal direction, relay I becomes energized: by its circuit as previously traced. Upon the energization of relay I when switch F is returned to its normal position, a switch indication circuit becomes closed, passing from terminal 13 of batteryQ4, through wires 14 and 135, contacts 141a and 140 of relay K, wire 139, contact 58a of relay I, ,wire 57, contact 56 of relay G2, wire 55, winding of relay E1, wires 54 and 53, contact 52 of lever V, wire 51, winding of relay E2, wire 50, contact 49 of lever V, wire 42, battery Q2, wires 65, 64 and 63, contact1656 of relay T, wires 169 and 87, contact '88aof'relay 1, wire 138, contacts 137 and 136a'of relay K, and wire 142 to terminal 9 ofbattery Q3. By-meansof this circuit,.the potential between battery terminals 9 and 13 sends 'currentin opposition to battery Q2 and of suflicient magnitude to operate relay E2 in its reverse direction, but not of sufiicient magnitude to operate relay E1. RelayoE2 thereupon closes its contact 147, completing a circuit through the left-hand portion of the winding of relay E3, this circuit passingTfrom battery Q2, through wires 42, 43,44 and 89, contact 145 of relay E1, wire 146, contacts 147 and148'of relay E2, wire 149, contact 172 of lever V, wire 173,

left-hand terminal of the winding of relay W I claim is:

scribed only one form of remote control a'pparatus embodying my invention, it is understood that various changes and modifi-- cations may be made therein within the scope of the appended claims without departing from the spirit and'scope of my invention.

Having thus described my invention, what 1. In combination, a railway traflic governing device, a first and a second and a third section of railway track, a track circuit for each of said sections each including a track relay, a pair of conductors, means for supplying current of a given character to said conductors at a first voltage for controlling said traliic governing device, an indication means, means controlled by said trafiic govm'mg device for supplying current of said given character to said conductors at a secand voltage for controlling said indication means, a second and a third and a fourth indication means, and means controlled by said first and second and third track relays for supplying current of said given character to sea conductors for controlling said'second and third and fourth indication means respecti vely.

2. In combination, a railway traffic govorni'ng device, a first and a second and a third section of railway track, a track circuit for each of said sections each including a track relay, a pair of conductors, means for sup? plying current of a given character and of normalpol'arity to said conductors for con trolling said trarliic governing device, an inmeans, means controlled by said traflic governing device for supplying current of said given character but of reverse polarity to"said conductors for controlling said indication means, a second and a third indication means, means controlled by said first and second track relays for supplying said conductors with current of said given character but of greater magnitudethan the current which controls said traflic governimg device and said first indication'means, means including said current of greater m1 itude' for' controlling said second or sai third indication means according as said current is of normal or; reverse polarity respectively, a fourth indication means, and means controlled by said third track relay for supplying current of said given characten to said conductors for controlling said fourth indication means.

3. In combination, a railway switch, a pol'arized switch indication relay energized in itsnormml' or its reverse direction according as said switch is in its'normal or its reverse tion respectively, a second indication reay controlled by a neutral front contact of said olarized indication relay, a third indication relay controlled by aback contact of said second indication relay and by a neutral front contact of sai p a sed indication relay, a polarized switch control relay, a polarized fourth indication relay, a first and a second conductor, a manually operable lever having a normal and a reverse position, a circuit including the winding of said switch' fourth indication relay while said lever is in either its normal or its reverse position but causing said current to flow through said circuit in a normal or a reverse direction according as said lever is in its normal or its reverse position, a branch path'around said control relay and said third indication relay back contact in said circuit including a front contact of said third indication relay and a front contact of said first indication relay, means including a second source and controlled by polar contacts of said first indication relay for supplying said circuit through said'branch path with currentof reverse or normal polarity according as said polar contacts are closed in their normal or raverse positions respectively, the potential of said second source being great enough to send current of suflicient'magnitude in opposition to the potential of said first source to cause said fourth indication reiay to close its polar contacts in their reverse position, means for controlling the operation of said switch by said control relay, and indication means controlled by said fourth indication relay.

f. In combination with a railway switch, a first and a' second section of railway track, a track circuitforeach of said sections each including a track relay, a first slow releasing repeater relay controlled by a front contact of said first track relay, a second slow releasing repeater relay controlled by a front contact ofsaid second track relay, a first polarized indication relay controlled by current of normal polarity flowing in a circuit including 7 f a back contact of said first track relay and a front contact of said first repeater relay and by current of reverse polarity flowing in a circuit including a backcontact of said second track relay and a front contact of said second repeater relay, a polarized switch control relay, a first and a second conductor, a second polarized indication relay, a manually operable lever' having a normal position and a first and asecond reverse position, a circuit 7 including the winding of said control relay and a neutral back contact of said first polarized indication relay as well as said first and second conductors and the winding of said second indication relay in series, means 10? ond track relay, means for supplying said insupplying said circuit with current of normal or reverse polarity according as said lever is operated to its first or its second reverse position, respectively, said current being of sufficient magnitude to operate said switch control relay but not said second indication relay, an indication circuit including a front contact of said first indication relay and a back contact of said control relay as well as a front contact of saidfirst repeater relay and a back contact of said first track relay and also said first and second conductors and the winding of said second indication relay in series and a contact closed while said lever is in its normal position, means for supplying said indication circuit with current of normal polarity to operate said second indication relay in its normal direction, a branch path around said contacts of said firsttrack relay and said first repeater relay in said circuit including a front contact of said second repeater relay and a back contact, of said secdication circuit through said branch path with current of reverse polarity to operate said second indication relay in its reverse direction, means for controlling the operation of said switch by said switch control relay, and indication means controlled by said second indication relay.

5. In combination with a railway switch, a first and a second section of railway track, a track circuit for each of said sections each including a track relay, a first slow releasing repeater relay controlled by a front contact of said first track relay, a second slow releasing repeater relay controlled by a front contact of said second track relay, a first polarized indication relay controlled by current of normal polarity flowing in a circuit including a back contact of said first track relay and a front contact of said first repeater relay and by current of reverse polarity flow ing in a circuit including a back contact of said second track relay and a front contact of said second repeater relay, a polarized switch control relay, a first and a second conductor, a second polarized indication relay, a manually operable lever having a first and a second position, a circuit including the winding of said control relay and a neutral back contact of said first polarized indication relay as well as said first and second conductors and the winding of said second indica tion relay in series, means for supplying said circuit with current of normal or reverse polarity according as said lever is in its first or its second position respectively, said current being of sufiicient magnitude to operate said switch control relay but not said second indication relay, around said control relay winding and said first indication relay back contact in said circuit a branch path includ ing a front and a normal contact of'said first indication relay and a front and a normal contact of said control relay as well as a front contact of said first repeater relay and a back contact of said first track relay, means for supplying said circuit through said branch path with current of reverse polarity and of sufficient magnitude to oper ate said second indication relay in its reverse direction, in multiple with said first'branch path, a second branch path including a front and a reverse contact of said first indication relay and a front and a normal contact of said control relay, means for supplying said circuit through said second branch path with current of normal polarity and of sufficient magnitude to operate said second indication relay in its normal direction, in multiple with said first branch path, a third branch path including a front and a normal contact of said first indication relay and a front and a reverse contact of said control relay, means for supplying said circuit through said third branch path with current of reverse polarity and of sufficient magnitude to operate said second indication relay in its reverse direction, in multiple with said first branch path, a fourth branch path including a front and a reverse contact of said first indication relay and a front and a reverse contact of said control relay and also a front contact of said second repeater relay and a back contact of said second track relay, means for supplying said circuit through said fourth branch path with current of normal polarity and of sufficient magnitude to operate said second indication relay in its normal direction, means for controllingthe operation of said switch by said control relay, and indication means controlled by said second indication relay.

In testimony whereof I afiix my signature.

JOHN M. PELIKAN.

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