Патент USA US2116178код для вставки
May 3, 1938. ' 2,116,178 w. T. POWELL. RAILWAY TRAFFIC CONTROLLING SYSTEM Original Filed July 31, 1934 U/ BY/ZMM % M ATTORNEY Patented May 3, 1938 2,116,178 UNITED STATES PATENT OFFI?E 2,116,178 RAILWAY TRAFFIC CONTROLLING SYSTEM Winfred T. Powell, Brighton, N. Y., assignor to General Railway Signal Company, Rochester, N. Y. Original application July 31, 1934, Serial No. 737,781, now Patent No. 2,083,525. Divided and this application March 4, 1937, Serial No. 129,017 4 Claims. (G1. 246-3) This invention relates to traffic controlling layouts, involving con?icting and noncon?icting' systems for railroads and it more particularly routes and various other conditions encountered pertains to a system for the remote control of in practice, it has been speci?cally illustrated as power operated switch machines. applied to a single track switch and preferably This application is a division of my prior appli associated with an‘ automatic block signal system cation Ser. No. 737,781, ?led July 31, 1934, now of the type, for example, as disclosed in the pendw ing application of S. N. Wight, Ser. No. 120,423, U. S. Letters Patent No. 2,083,525. In a system of remote control of power operated ?led July 23, 1926, now U. S. Letters Patent switch machines for use in connection with ter minals, interlocking plants and centralized traflic controlling systems, it is desirable that the various controls and indications required for e?icient op ' With reference to the accompanying drawing, 10 the railroad track switch TS is illustrated as con eration of a switch machine be obtained over a necting the rails 3 of a main track to the rails 4 of a diverging or turnout track. Track switch TS minimum number of line wires between the tower or control of?ce and the remote point where the switch is located. Therefore, one object of the is operated by a power driven switch machine SM, which may be of any suitable type such, for 15 example, as disclosed in the patent to W. K. Howe, present invention is to provide a simple and re~ liable arrangement of line circuits and relays so No. 1,466,903, issued September 4, 1923. organized that several different distinctive con trolling conditions may be simultaneously trans mitted in response to the energization or de energization of the line circuits. More speci?cally, this invention provides for the transmission of the controls required for a 25 power operated switch machine over a single polarized line circuit and the provision in such a circuit of an improved arrangement for requiring the movement of the control lever at the time the locking is ineffective, in order to operate the 30 switch machine in such a manner that it will not operate after a train movement over the switch until the operator shifts the control lever to its last previous effective position. Brie?y, an electric lock equivalent arrange 35 ment is provided whereby, in the event that the operator shifts the switch machine control lever while the circuits have the switch machine locked against operation, it is necessary for the operator to restore the switch machine control lever into 40 ‘correspondence with the position of the as sociated switch machine control relay before con trol of the switch machine is obtained, regardless of whether the switch machine remains locked 45 2,082,436. or becomes unlocked in the interim. Various other characteristic features and ad vantages of the invention will be in part apparent and in part speci?cally pointed out as the de scription thereof progresses. In describing the invention in detail reference 50 will be made to the accompanying drawing, which is a diagrammatic illustration of the present in vention as applied to the control of a single track switch at a remote location. Although the tra?ic controlling system of the 55 present invention may be applied to various track This switch machine may be provided with a dual con trol selector to permit hand operation of the track switch such as shown, for example, in the 20 patent to W. K. Howe, No. 1,852,576, issued April 5, 1932. The main track adjacent the track switch TS and a portion of the diverging track to the fouling point, comprises a detector track circuit of the 25 closed circuit type with the usual track battery 5 and track relay T, which detector track circuit is insulated from the rest of the track layout by the usual insulated joints. Tra?ic over the track switch in an east bound direction is governed by signals I and ID on the main track and on the turnout track respectively. Traffic over the track switch in a west bound di rection is governed by signals 2 and 2D on the main track and off the turnout track respectively. 35 The track switch and the switch machine are preferably provided with point detector contacts of some suitable type such, for example, as dis closed in the patent to C. S. Bushnell, No. 1,517,236, issued November 25, 1924. These point 40 detector contacts are employed to energize a switch position repeating relay of the usual polar neutral type, in accordance with the position and the locked or unlocked condition of the track switch, but since this particular feature forms no 45 part of the present invention it has been omitted from the disclosure for the sake of simplicity. Referring to the drawing, a polar relay WZ of the magnetic stick type is governed from the control o?ice over a suitable polarized line cir cuit, including line conductor WL and common conductor C. This relay may be of any suitable type, in which the polar contacts are operated to one extreme position or the other in response to current ?ow over the line circuit in a particular 55 2 2,116,178 direction or another, the polar contacts remain ing in their last actuated positions when the winding of the relay is deenergized. Signal repeating relay M is provided to repeat Relay LP is energized over a stick circuit ex— the condition of the signals associated with the illustrated track section. This relay is ener tending from the (B+) terminal of battery B1, front contact 25 of relay L, resistance RS, front gized as long as all signals are at stop and is de~ energized when any one of the signals is clear. LP, to the (B—) terminal of battery B1. Since the method of providing this feature forms 10 no part of the present invention and since it is well known to those skilled in the art, the opera tion of relay M is merely indicated by associating the relay with contacts ll, I2 and [3 of the as sociated signals by a dotted line to indicate that 15 the relay is energized when all the signals are at stop. , Lock relay L is provided to lock the associated switch control circuit against operation when ever the track section is occupied or whenever a 20 signal is clear. Such operation. is provided by deenergizing relay L to open the control line cir cuit extending to relay WZ. Lock repeater relay LP is provided for the pur pose of effecting the electric lock equivalent fea 25 ture, as will be speci?cally pointed out. Resist ance RS is for the purpose of maintaining a substantially uniform current flow through the upper winding of relay LP, whether this winding is energized locally by both portions of battery B1 30 or over the line circuit. In the control o?ice, signal control lever SGL is illustrated to indicate that the signals at the remote point are controlled over signal control line conductor GL. Since this operation forms 35 no part of the present invention, it is merely indicated by a dotted line, the detailed circuits being omitted. Switch machine control lever SML in the control o?ice is for the purpose of controlling the associated switch machine, the 40 detailed operation of which will be explained later. Battery B in the control office and battery B1 at the ?eld station are each provided with a cen ter tap (CN), with these center taps being con 45 nected together by means of common conductor C. The symbol (B+) is associated with the (+) terminal of each of these midtap batteries and symbol (B—) is associated with the (-) terminal of each battery, it being understood that current 50 ?ows from the (B+) terminal in the external circuit back to the midtap or the (B—) terminal as determined by the circuit connections. To simplify the illustration, the symbol (+) is used to indicate the positive terminal and the symbol 55 (——> is used to indicate the negative terminal of a suitable battery or other source of current at the station, with the circuits to which these ter minals are connected having current ?owing in the external circuit from (+) to (—). It is believed that further description of the present invention will best set forth the charac teristic features and functions of the system, by considering the detailed operation under certain characteristic or typical conditions. 65 for energizing relay L which extends from (+), front contact 1 of relay M, front contact 6 of relay T and winding of relay L, to (—). Operation Normal condition.—With the detector track section unoccupied and with the switch control lever SML in the position illustrated, the various 70 devices, relays and circuits assume positions and conditions of energization as illustrated. Since it is assumed that the track section is unoccupied, track relay T is normally energized and since all signals are at stop, relay M is normally energized. With relays M and T energized a circuit is closed contact 26 of relay LP and upper winding of relay The energizing current for the upper winding of relay LP is maintained at a normal level, when both 10 portions of battery B1 are connected to the circuit, by means of resistance RS. Relay WZ is energized over a circuit extending from the (B+) terminal of battery B in the con trol office, lever SML in its normal position, line 15 WL, front contact 2| of relay LP, front contact 20 of relay L, winding of relay WZ and common conductor C, to the (CN) terminal of battery B, which is the (-) terminal of the right hand por tion of this battery. Contact In of relay WZ, in 20 its right hand normal position, controls the nor mal operating circuit of switch machine SM and contact H1 in its left hand reverse position con trols. the reverse operating circuit of switch ma chine SM, as indicated by reference characters N1 25 and R1. Manaal control of track switch-It will now be assumed that the operator moves lever SML to, its reverse dotted line position. The actuation of lever SML to its reverse position closes a cir 30 cuit from the (B—) of battery B, contact of lever SML in its reverse position R, line con ductor WL, front contacts 2| and 20 of relays LP and L respectively, winding of relay WZ and con ductor C, to (CN). The reversal of current over 85 the line circuit switches the polar contacts of relay WZ from their right hand normal positions to their left hand reverse positions and contact I0 governs the operation of the switch machine to its reverse position. 40 The operation involved in actuating the track switch from its reverse position to its normal position is merely the reverse of that described and need not be speci?cally pointed out. It need only be mentioned that the return of lever 45 SML to its normal position reverses the current flow through relay WZ for positioning the polar contacts of this relay back to their right hand normal positions. Manual control of signals.——Assurning clear 50 traffic conditions, either signal I or 2 may be cleared with the track switch in a normal position and signal ID or 2D may be cleared with the track switch in a reverse position. The signals are governed in accordance with the position of 55 signal lever SGL and, as above mentioned, the detailed circuits for clearing the signals are not shown. It will be understood that the series circuit including relay M is opened when any signal is cleared, due to the opening of some one of the contacts ll, 12 or I3. The deenergization of relay M opens the ener gizing circuit of relay L at front contact ‘I, caus ing relay L to be deenergized. The opening of front contact 20 of relay L locks the switch con trol circuits, so that the operator does not have control over relay WZ during the time that a sig nal, governing traffic over the track switch, is clear. An “electric bias control” feature is provided to maintain relay WZ energized in its last ener gized condition when relay L is dropped. For example, with the circuits in the conditions shown, the dropping of relay L closes a circuit for main taining relay WZ energized in the same direction, 60 65 70 75 2,116,178 3 which circuit extends from’the (B+) terminal of battery B1, contact 22 of relay WZ in its right hand position, back contact 20 of relay L and terminals of the windings of relay LP. For ex; winding of relay WZ, to (ON) . It will be obvious that if relay WZ has its contacts in their left hand position, due to lever SML being actuated to its reverse position, then the release of relay L completes a circuit for maintaining relay WZ traced from the (B+) terminal of battery B, con tact of lever SML in its normal position, conduc tor WL, back contact 2| of relay LP, front contact 24 of relay L, contact 23 of relay WZ in itsleft hand energized, from the (B—) terminal of battery B1, the (B+) terminal of battery B1, which circuit 10 contact 22 of relay WZ in'its left hand dotted position, back contact 20 of relay L and winding of relay WZ, to (CN) . Electric lock equioale'nt.—In the event that the operator actuates lever SML to a new position while the track switch is looked, as indicated by relay L being deenergized, this actuation is in effective to condition the control circuits. With the circuits in the conditions indicated, it will be assumed that relay L is deenergized and that the 20 operator actuates lever SML to its reverse posi tion before relay L is picked up. It will be un derstood that relay L will be dropped by deener gizing its circuit in response to the clearing of a signal or in response to the occupancy of the track 25 section, as above described. Since the control line circuit WL is open at front contact 20 of relay L, the actuation of lever SML is ineffective to ener gize relay WZ. The deenergization of relay L opens the above 30 described stick circuit of relay LP at front con tact 25, so that relay LP is released. Under this condition, the actuation of lever SML is ineffec tive because the WL line circuit is open at front contact 2i of relay LP and at front contact 24 of 35 relay L, both relays being deenergized. When relay L is again picked up, then if lever SML is in its normal position a circuit is closed for picking up relay LP which extends from (B+) , contact of lever SML in its normal position, con 40 ductor WL, back contact 2| of relay LP, front contact 26 of relay L, contact 23 of relay WZ in its right hand normal position, upper winding of relay LP, through the right hand portion of bat tery B1 and conductor C, to the (CN) terminal of battery B. It will be noticed that the right hand portions of batteries B and B1 are connected in series aiding relation in the above described circuit, so that relay LP is energized. The closure of front contact 26 of relay LP completes the stick circuit for this relay before the above described pick up circuit is broken at back contact 2|. This is due to the fact that front contact 26 closes before back contact 2| opens. This stick circuit extends from the (B+) terminal of battery B1, front contact 25 of relay L, resistance RS, front contact 26 of relay LP and upper winding of relay LP, to the (B—) terminal of battery B1. A similar condition exists with relay WZ in its left hand reverse position, when relay L is picked (i0, up after being deenergized. Under this condi tion a circuit is closed for energizing relay LP which extends from the (B—) terminal of bat tery B, contact of lever SML in its reverse dotted line position, conductor WL, back contact 2! of relay LP, front contact 24 of relay L, contact 23 of relay WZ in its left hand dotted position, lower winding of relay LP, through the left hand por tion of battery B1 and conductor C, to the (CN) terminal of battery B. Relay LP again picks up 70 and closes its above described stick circuit. In the event that lever SML is actuated out of correspondence with relay WZ when relay L is deenergized, then upon the picking up of relay L, relay LP cannot be energized because like ter minals of the batteries are connected to opposite ample, with lever SML in its normal position and ‘ relay WZ in its reverse position, a circuit may be dotted position and lower winding of relay LP, to is not energized and will not pick up the LP relay. 10 Or if lever SML is in its reverse dotted line position when relay W2 is in its normal position, then a circuit may be traced from the (B~—) ter minal of battery B, contact of lever SML in its reverse dotted position, conductor WL, back con 15 tact 2| of relay LP, front contact 24 of relay L, contact 23 of relay WZ in its right hand normal position and upper winding of relay LP, to the (B—) terminal of battery 131. Current does not flow in this circuit because like terminals of both 20 batteries are connected to opposite terminals of the relay winding and the relay will not be picked up. It therefore becomes necessary for the op erator to restore lever SML to the position it pre viously occupied when the last effective control 25 ‘was exercised over the switch control circuits, be~ fore control of these circuits can again be ob tained. It is to be understood that, although only one speci?c embodiment of the present invention has 80 been disclosed, the principles of the invention may be applied to various other types of systems and various types of track layouts may be controlled in a similar manner, without departing from the spirit of the present invention. The present dis 35 closure has been chosen merely for providing a simplified showing which could be clearly de scribed in the speci?cation. Having described a traf?c controlling system for one speci?c embodiment of the present invention, 40 it is desired to be understood that the form is se lected to facilitate in the disclosure rather than to limit the number of forms which it may assume and it is to be further understood that various modi?cations, adaptations and alterations may be 45 applied to the speci?c form shown in order to meet the requirements of practice, all without in any manner departing from the spirit or scope of the present invention except as limited by the 50 appended claims. What I claim is: 1. In a system of control for power operated track switches for railroads; a switch machine for operating a track switch; a source of energy at said switch machine; a polar relay at said switch 55 ‘machine for controlling it to normal and reverse positions; a switch machine control lever and a source of energy at a control o?ice; a normally energized lock relay associated with said switch machine and deenergized whenever it is unsafe, 60 to operate said track switch; a lock repeating relay; a control circuit for said polar relay in cluding a front contact of said lock repeating re lay and energized with current of one polarity or the other from said control o?ice source of 65 energy in accordance with the position of said switch machine control lever; pick-up circuit means for said lock repeating relay including a front contact of said lock relay and both said control oflice source of energy and said source 70 of energy at said switch machine, said pick-up circuit having current flow therein only when said control of?ce source of energy is connected into said circuit by said switch machine control lever in an aiding relationship to said source of 75 4 2,116,178 energy at said switch machine as it is then con nected in the circuit by said polar relay; and stick circuit means for said lock repeating relay including a front contact of said lock relay and its own front contact, said stick circuit means when once energized remaining energized de pendent upon said lock relay irrespective of cor respondence between said switch machine control lever and said two-position polar relay. 10 for said lock repeating relay for energizing said lock repeating relay when once picked up‘ de pendent only upon the picked up condition of said lock relay. 3. In a system of control for power-operated track switches for railroads; a switch machine; a switch control polar relay for governing the oper ation of said switch machine to the normal or reverse position; a source of energy and a control 2. In a remote control system for power-oper lever at a distant control office; a control circuit 10 ated track switches; a power-operated switch for energizing said switch control relay with one polarity or the other from said control o?ice source in accordance with the position of said lever; a lock relay adjacent the switch machine automatically deenergized when the switch ma 15 chine operation should be prevented; means rendered effective upon deenergization of said lock relay to open said control circuit and to machine; a source of energy at said switch ma chine having terminals of opposite polarity and a mid-tap; a polar relay for controlling said 15 switch machine and having one terminal con nected to the mid-tap of said source of energy at said switch machine; a switch machine control lever at a control o?ice; a source of energy at said control o?ice having terminals of opposite 20 polarity and a mid-tap; a lock relay associated with said track switch and energized except when it is unsafe to operate said track switch; a lock repeating relay having two windings; a common line wire connecting the mid-tap of said control oi?ce source of energy and the mid-tap of said source of energy at said switch machine; a con trol line wire extending between the control o?ice and said switch machine and connected to one terminal or the other of said control o?ice source 30 of energy in accordance with the position of said switch machine control lever, said control line wire at the switch machine being connected to said polar relay through a front contact of said lock repeating relay; circuit means connecting 35 the two windings of said lock repeating relay to the opposite terminals of said source of energy at said switch machine; circuit means connecting the other terminal of one of said windings of said lock repeating relay through a circuit including a contact closed with said polar relay in, one posi tion and a front contact of said lock relay to said control line wire, and connecting the other ter minal of the other winding of said lock repeating relay through a circuit including a polar contact of said polar relay in its other position and a front contact of said lock relay to said control line wire, whereby said lock repeating relay is ener gized with a potential of said control o?ice source in an aiding relation to a potential from said switch machine source of energy when said switch machine control lever and said polar relay are in corresponding positions; and stick circuit means maintain it open until said means is restored; a source of energy at the switch machine, and a 20 restoring circuit for said means including a con tact closed only if said lock relay is energized, said source of energy in the control o?ice and contacts of said lever; said source of energy at the switch machine and polar contacts of said 25 switch control relay, said restoring circuit having current ?owing therein only if said lever and said polar contacts are in corresponding positions so that said sources of current act cumulatively. 4. In a system of control for power-operated 30 track switches for railroads, a switch machine, a switch control polar relay adjacent the switch machine for governing its operation to the nor mal or the reverse position, a control lever and a battery at a distant control office, a control cir 35 cuit including a line wire for energizing said switch control relay with one polarity or the other in accordance with the position of said lever, a lock relay deenergized whenever operation of the switch machine should be prevented, a stick relay 40 adjacent the switch deenergized whenever said lock relay is deenergized for opening said line wire of said control circuit and to maintain such open~ ing until said stick relay is restored, a local bat tery at the switch machine, and means including said line wire for restoring said stick relay only if the battery in the control office is connected to said line circuit by said lever with a polarity to act cumulatively with the battery at the switch machine as connected to said line wire by a polar contact of said switch control relay. W'INFRED T. POWELL.