US1805531A - Railway traffic controlling apparatus - Google Patents

Description

May 19, 1931. c. F. STOLTZ RAILWAY TRAFFIC CONTROLLING APPARATUS Filed Oct. 29, 1929 vvh INVENTOR'. CR5 2; D It 2.,

I atentecl May 19, 193i T ,STATES' To foFFIcs- CARL IE. S'rQLTZQoFpE LHI, 1110, ASSIGNOR" no-THE UNION swr'rcn & sreiml. COMJ PANY, on SWISSVALE,-PENNSYLVANIA,TK conPoRArIoN or PENNSYLVANIA? Runway TRAFFIC CONTROLLING APPARATUS Application filed October 29,1929. Serial in, 403,2 1. 3

. Myinventionrelates to railway traific conselector'A are twoselector relays F and F which arefnormally ole-energized, but which trolling apparatus, and particularly to apparatus of the type comprising railwaysignals controlled jointly by track circuits and by remote controlled selectors.

One feature of my invention is the provision, in apparatus of this character, of

means for removing the signals fromcontrol by the selector in the event of failure of the selector or of the transmission line which controls it, whereby the signals will then function as automatic signals. i i Y I will describe one form of apparatus embodying my invention, and will then point out the novel features thereof in claims.

The accompanying drawing .is a diagrammatic view showing ,;one form of apparatus embodying. my invention.

Referring to the drawing, the, reference.

characters 1 and 1 designate the track rails of a stretchof railway track along whichftraffic moves in bothclirections. This 'stretchcomprises a main track A 'and a side track'D connected with the maintrack by a switch The rails of the main track are divided by insulated joints 2 to form a pluralityof sections, 28-29, 29-30, etc. ,fandleachtrack section is provided with a track circuit comprising a track battery 3 and altrack re'l'aIyT. The track circuit for section 30-31 includes the rails of the side track D up to the fouling point. 7 I I 7 Located at the point 30 is a signal S governing trafiic moving toward the right, and located at'the point 31 is another signal S governing trafiic moving toward the left. The latter signal comprises two arms-a and b, the former of which is 7 effective when" the switch E is in its normal position, andthe latter of which is efiective when the-switch is in its reverse position. Trafiic from the side track D into the main track A'is controlled by another signal 8*: located 7 at the point 30;

An additional signalS is located at'the point 33 for governing traflic'o n'coving toward the left.

The reference character Adesi'gnatesa selector which is controlled from a remote oflice,a pick-up circuit for relay F is closed,

which circuit passes from' t-er'minal B of a suitable sourceof current, through the selector A,wire 34, and the winding of relay F to terminal 0 of the same source of'current'.

A stick circuit vfor relay F willthen'become closed, which circuit passes from terminalB, through the selector A, wire 35, front contact 15 of'relay F and the winding of relay F to terminal 0. Q Relay F willthen remain energized until the selector is operated to open this 1 stick circuit. Relay F is controlled by the selector A in similar manner, but responds to the operation "ofa different key 'in the despat-chers oflice Each'rsignal Sis provided with a home relay, designated by the reference characterjH with thesameexponent as that of the signal which it controls. Each signal is controlled "by theassociated relay H in such manner that the signal will give "a stop indicatiLO, when {the relay is de'-energized,land apro ceed indication when'the relay becomes energized; The

circuits :for the control of the signals' byitlie home relayswillfbe obvious from the drawing', and ti'on; I p i i y v "The home relays H are controlled jointly by the selector relays F and the track relaysT, as well'asby a circuit controller K which is operated by theswitch'EJ As shown in thedrawing, both relays fE and F are de energiz'ed, so that all of the home relays H are deenergiz'ed, with the exceptionfofrelay Hwhiclicontro1s signal 8?.

willitherefore require no explana The circuit'for home, relay, H is fromtermi- Inalsi B,fthrou gh backcontact 13 of relay ng back. Contact 14: of relay, Ht, front Contact 9 of trackirela'y T frontfcontact 11 ofitrac'k relay T, front Contact 27 of track relay Ti, and the winding of relay H ft'o terminalQ. lt'follows that signal S nor ally gives a pieceed indication, whereas, the remaining signals normally indicate stop. f p I w l N w t i le jfie a g epe ated in such manner as to cause relay F to become energized, and I will also assume that switch E is in the normal position. Home rela H will then become energized by virtue of a circuit which passes from terminal B, through front contact 12 of track relay '1, contact 10 of relay T, contact 6 of relay T, contact 16 of relay F contact 24 of circuit controller K, and the Winding of relay H toterminal 0. relay H becomes energized, signal S will be caused to give a proceed indication. If switch E is in the reverse sition when relay F becomes energized, ome rela H will become energized instead of relay the circuit being the same as before up to contact 24 of circuit controller K; the circuit then passes through relay H instead of relay H This will cause the signal S to give a proceed indication. t

In either event, that is, if either relay H or H becomes energized, the circuit for home relay H will be opened at back contact 13 of rel H or back contact 14 of relay H, so that signal S will be caused to give a stop indication.

I will now assume that the selector A is opcause arm a of signal S to give a proceed indication. If I switch E is in the reverse position instead of the normal position, relay H will become energized, and this will cause arm 6 oi signal S to give the proceed indication. In either event, the circuit forire'lay H will not be disturbed, and, consequently, signal S will still give a proceed indication. I t c The circuits for the home relays H H, HF, and H are provided with shunts around the front contacts of the selector relays F and F which shunts include front contacts of it normally de-energized cut-out relay G. Relay G isfprovided with a circuit which includes a normally open manually operable circuit controller J so that when this circuit controller is closed the relay will be energized. Assuming now that both selector relays F and F are deenergized, and that circuit controller J is closed to cause relay G to become energized, and also assuming that all of the track relays shown in the drawing are energized, relay H will become energized by virtue of a circuit which is the same as before, exce t that it includes front contact 20 of relay instead of front contact 16 of relay F Rela H will also become energized by virtue o a circuit which is the same as before exce t that it includes front contact 21 of relay instead of front contact 18 of relay F Signal S and for normally controlling said signal by arm a or signal S will then both giie proceed indications. The circuit previously traced for relay H will then be opened at contact 13 of relay H but this relay will become energized bfy virtue of an auxiliary circuit which passes rom terminal B, through contact 23 of relay G, contact 9 of relay T contact 11 of relay T, contact 27 of relay T and the winding of relay H to terminal 0. It follows that signal S will then u in spite of the fact that relay H is energized.

ive a proceed indication Of course, if switch E is in the reverse position, relay H will be energized instead of relay H and relay H will be energized instead of relay Hi, with the result that signal S and arm b of signal S will give proceed indications.

In the event of failure of the selector A, or of the transmission line L, or of the apparatus in the despatchers oflice for controlling this line, circuit controller J may be closed by hand, thereby removing the signals from control by'the selector A, so that these signals will functionas automatic signals controlled by thetrack relays T. In this connection it should be noted that under normal operating conditions it is impossible for signals S and S or for signals S and Sto simultaneously give proceed indicationsthereby effecting what is known in systems of this character as traffic locking. When the cutout relay G is energized, this trafiic locking is removed, because the back contacts 13 and 14 of relays H and H are eliminated from the control of relay H with the result that signal S may givea proceed indication simultaneously with signal S or S.

Although I have herein shown and described only one form of apparatus embodying my invention, it is understood that various changes and modifications may be made therein within the scope of the appended claims without departing from the spirit and scape of my invention.

aving thus described my invention, what I claim is:

1. In combination, a section of railway track, a track circuit including a track relay for said section, a signal governing trafiic through said section, a remote controlled selector associated with said signal, means for normally controlling said signal by said track relay and said selector, and. manually operable means for removing said signal from control by said selector whereby the signal may function as an automatic signal in the event of failure of the selector or of the line .over which it is controlled.

for said section, a signal governing traffic through said section, a remote controlled selector associated with said signal, means said y detrack relay and said selector, a normal energized cut-out relay, means effective when said relay is energized to remove said signal from control by said selector, and a circuit for said relay including a normally open manually operable circuit controller.

3. In combination, a section of railway track, a track circuit including a track relay for said section, a signal governing traf fic through said section, a remote controlled selector associated withsaid signal, a normally de-energized selector relay, means controlled by said selector for energizing saidv selector relay, a controlling circuit for said signal including a front contact of saidtrack relay and a front contact of said selector relay in series, a branch for said signalcircuit around said selector relay contact and cluding a front contact of said track relay and a front contact of said selector relay in series, a branch for said signal circuit around said selector relay contact, and manually operable means for closing said branch whereby said signal may be removed from control by said selector.

5. In combination, a stretch of railway track, a track circuit including a track relay for said stretch, two'signals governing trafiic in opposite directions along said stretch, a remote controlled selector, means for normally controlling said signals by said selector and by said track relay, and manually operable means for removing said signals from control by said selector whereby the signals may function as automatic signals.

6. In combination, a stretch of railway track, a track circuit including a track relay for said stretch, twosignals S and S governing traffic in opposite directions along said stretch, a remote controlled'selector, a

normally de-energized selector relay, means controlled by said selector for energizing said controlled by said selector for energizing said selector relay, a normally de-energized home relay for signal S means for normally controlling said home relay by said selector relay and by said track relay, a circuit for signal S including a front contact of said track relay and a back contact of said home relay in series, a normally de-energized cutout relay, manually operable means for energizing said cut-out relay, and means operat ing when said cut-out relay is energized to remove said home relay from control by said selector relay and to close a shunt in the circuit for signal S around the back contact of said home relay. 7

8. In combination, astretch of railway track, a track circuit including a track relay for said stretch, two signals S and S governing traffic in opposite directions along said stretch, a remote controlled selector, a normally de-energized home relay signal S, means for normally controlling said home relay by said selector and by said track relay, means for normally controlling signal S by said track relay and by aback contact of said home relay, and manually operablemeans for removing said home relay from I control bysaid selector andremoving signal S from control by said home relay.

9. In combination, av stretch of railway track, a track circuit including a track re lay for said stretch, two signals S and S governing traflic in opposite directions along, said stretch, a remote controlled selector, a normally de-energized home relay for signal S means for normally controlling said home relay by said selector and by said track relay, means for normally controlling signal S by said track. relay 'andby a back contact of said home relay, a-normally- (Lie-energized cutout relay, manually operable means for-energizing said cut-out relay, and means operat ing when said cut-out relay is energizedto remove said home relay from control by said selector and to remove signal S from control by said home relay. a I In testimony whereofI afiix my signature. r CARL F. STOLTZ.

selector relay, a normally de-energized'home relay for signal S means for normally controlling said home relay by said selector relay and by said track relay,'means for nor mally controlling signal S by a back contact of said home relay and by said track relay, and manually operable means for removing said home relay from control by said selector relay and for removing signal S from control by said home relay.

7.In combination, a stretch of railway ice I

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