DE657709C - Remote control - Google Patents

Description

The invention relates to a device for remote control, in particular of Railway switches and signals from a central monitoring point under Be-5, use of two continuous control lines and one continuous feedback line by means of key streams,

In a known device of this type, the key streams always consist of one same number of key stream pulses of the same length, and the switching point is selected by a special element of the keystream that differs from the other elements, namely this one Distinguishing element reverse polarity as the others, and "the place where the The distinguishing element located in the keystream is for the selection of the determining the device to be controlled.

According to the invention, several substations or intermediate receiving points are on connected to the continuous control lines, each of which has a certain number of finally mastered devices to be controlled, and each substation contains one certain number of devices to be finally controlled. To receive the key stream pulsesi serve two relay groups connected in parallel and fed by the continuous control lines, one of which responds to any impulse while the other or the other respond only to one or more selected pulses of variable frequency, and of the frequency contained in the sub-divisional element. So you have the possibility of not only controlling one substation, as is the case with the known Arrangement is the case, but several, and the selection of the intermediate receiving point and The route to be finally controlled is located on it before the direction is carried out by the combined effect of the two types of receiving devices.

In the drawing, Figs. 1 and 2 are to be placed together with their ends, with Fig. Ι comes to the left. ' Both together form a circuit diagram, which is an embodiment of a railway line control apparatus according to the invention.

Fig. Ι shows the equipment and

Fig. 2 the equipment installed at the remote location.

Fig. 3 is a cross section showing an embodiment of the receiving relay that is suitable for use with the apparatus shown in Figs.

Figs. 4, 5 and 6 are the cross-sections along lines IV-IV, V-V and VI-VI of the Fig. 3.

Fig. 7 is an individual representation of a part of the receiving relay shown in Fig. 3, seen in the direction of the arrow VII in Fig. 6.

Fig. Ι explains the equipment of the dispatch point, from which characters are transmitted that consist of elements of different

different textures are composed. In the illustrated specific example, each element of a pulse is a periodic stream of different frequencies These frequencies are supplied by three alternators X, Y, Z, which are driven by a motor having an armature and a field magnet 5. 6 The armature 5 is always in the switched-on position with the line ends B and C of an excitation source not shown. The magnetic field is connected to the line ends B and C via a resistor 7, which can be shunted by means of the contact 8 of a centrifugal governor Ji driven by the motor m , so that it causes the motor to work at a constant speed and in this way the Frequencies of the currents that are supplied by these alternating current generators, approximately. to be maintained consistently.

Means are provided to connect the alternators X ₃ Y ₁ Z optionally with two line wires 3 and 1, which extend from the dispatch point to one of the remote substations where the devices to be controlled from the dispatch point are located are. The connections between the alternators and these line wires are controlled by three transmitting magnets AD ^X , AD ^Y , AD ¹ . If the transmitting magnet AD ^{X is} excited, its normally open contact 9 is closed, and the alternating current generator X is then switched on via the lead wires 1 and 3. In the same way, when the magnet AD ^{Y is excited,} the alternator Y is switched into the lead wires 1 and 3 and when the magnet AD ^{Z is excited} the. AC generator Z via the line wires ι and 3.

The transmitting magnets AD ^X , AD ^Y and AD ⁷ - are partly controlled by a contactor PA that works step-by-step by a magnet FA. The step-by-step contactor has a ratchet wheel 33 which is actuated by means of a pawl 34 driven by the magnet FA. The wheel 33 cooperates with a number of stationary contact pieces 35, 36, 37 ... 40, which are arranged so that an arm of the wheel 33 is always on one of these contact pieces. According to the drawing, an arm grasps the contact piece 35. If the magnet FA is now excited, the pawl 34 is moved one step along the wheel 33, and if the magnet FA is de-excited, the wheel 33 is advanced by one step, so that the arm now engages contact 36. In the same way, successive excitations and de-excitations of the step-wise working magnet FA advance the connection of the wheel 33 from one contact piece of the step-wise / step-wise working contactor to the next contact piece in the sequence working contact ■ g'eber PA act main switching relay J ^a, χ, a starter relay, and two time-determining relay j 'j ⁴ and ^a together, the Wirküngsweise will be explained below.

The dispatch point is provided with a number of panels, one for each station to be controlled, and each panel has manually controlled switching devices which are used to control the actuating devices on the associated station individually. For example, the panel BB in Fig. Ι is provided with two switching devices BE ¹ and BE- , each of which contains a lever 12 in the form of a cam that adjusts a slider 13. The lever also carries with it a movable contact 14 which can be brought into contact with a selected one of a number of stationary magnets. The switching devices BE ¹ and BE ² · are suitably mounted on a rail or track model 26, with a handle 2J to the locations of the lever 12 of the switching device BE 'is provided. ¹ The piece of the route model, which is arranged at panel BB , is further provided with a number of indicator lamps 29, 30, 31 and 32, which are switched in the manner described below to inform the clearance officer of the state of the position of the handles 27 to teach dependent apparatus. For the sake of simplicity, only panel BB is shown completely in the drawing. Only pieces of the other panels CC and DD are drawn in Fig. 1.

As far as the panel BB is concerned, the switching devices BE ¹ and BE ^{Z represent} a movable part 18 which is ^{mounted at i8 a} swivel bar and is arranged so that it moves to the left when the lever of one or the other switching device is served. When the part 18 is moved to the left, the contact arm 20 comes out of contact with the contact 22 which it usually engages and with the contact 21 in contact. This adjustment of the arm 20 enables a pawl 23, under the influence of gravity, up to one position

elangen, in which the backward movement of the arm 20 is prevented.

Furthermore, each panel is provided with a key current control relay BW ₁ CW etc., the winding 25 of which controls a finger 24 and a number of contacts. If the winding 25 of the relay BW is energized, it moves

Finger 24 to the left, and the tip of this finger grasps the arm 20 and lifts at the same time the latch-23. Therefore, under these conditions the arm 20 released from the pawl; however, it is held in its position on the left, so that the contact 20-21 remains closed until the winding 25 is de-energized.

The switching device BE ¹ can be used to set points on the associated remote station. If the handle 27 assumes the position shown, the contact 14-ιό operated by the lever 12 is closed. If, however, the handle 27 is changed over, the contact 14-15 is closed. The handle 28, which operates the switching device BE ² , is used to set railway signals on the same station. This handle takes the drawn one

ao position, the contact 14-16 of the switching device BE ″ is closed. When the handle 28 is moved to the left, the contact 14-17 closes, and when the handle 28 is moved to the right, the contact 14-15 closes.

The wires 1 and 3 extend to all intermediate receiving points (substations) that are to be controlled by the dispatch point in Fig. Ι; the lead wire 3 serves as a common return, and the lead wire 1 contains an AC transformer at each station. In particular from Fig. 2 it can be seen that on the station with the index B, the primary line of the transformer t ^{B is} connected in series with the line wire ι, and transformers of the same type are arranged on each of the other stations.
By means of the apparatus according to the invention, traffic control devices of any type can be controlled; however, for the purpose of explanation, a piece of a railway section is drawn from which is provided with switch tongues 50 which lead into a side track 51. The section ab is provided with a track circuit which contains a battery 52 which is connected across the rails located near one end of the section and via a track relay ν connected between the rails located near the other end of the section is switched on. The tongues 50 are set by a motor g , which contains an armature 53 and a field magnet 54, and is partly controlled by two switch relays p ¹ and p ^2. The tongues 50 in turn control a changeover switch 55 which controls the polarity of the current coming from the line ends B and C to a display relay k. The relay k is energized in the usual direction so that its pole contacts are on the left when the tongues 50 are in their normal position. However, if the tongues assume the changed position, the relay is energized in the opposite direction, so that its pole contacts are moved to the right. If the tongues 50 take any intermediate position, the display relay k is de-energized so that its working contacts are open. Tongues 50 also control two contacts 56 and 57, of which contact 56 is closed at all times except when the tongues are in their fully open reversed position, and contact 57 is closed at all times when the tongues are in their normal fully open position.

In the east direction by the portion from continuous transport is controlled by two Signalew ¹ and w ² monitors which are mounted after the drawing on the same mast. Similarly, westbound traffic is directed by two signals w ^s and w ⁱ . The signals w ¹ , w ² , w ³ and w ⁱ are provided by two signal relays q ¹ and q ² .

The switch relays p ¹ and p ² and the signal relays q ¹ and q ² on the station with the index B are controlled by receiving devices, which are described in detail below.

According to the drawing, the switching devices BE ¹ and Bp on the board BB of the dispatch point assume their basic position, as do the tongues 50 on the station BB shown in FIG. The switching ^{relays /) 1} and p ² are both energized, as are the signal relays q ¹ and q ² , so that all the signals on the station shown assume their stop position. When discussing the mode of operation of the apparatus as a whole, it is first assumed that the dispatch officer wishes to change the switch points 50 on the substation with the index B _1, called station for short. To bring about this result, he moves the handle 27 of the switching device BE ¹ (Fig. 1) into the converted position. As a result, the slider 13 of the cam piece adjusted by the switching device BE ^{1 is} moved to the left and the movable part 18 is taken along to the left, so that the contact 20-21 closes. At the same time the contact 19 is opened. The pawl 23 now engages the arm 20, as a result of which this arm is kept in permanent contact with the contact 21. When the handle 27 has fully reached its repositioned position, the part 18 returns to the position shown, whereby the contact 19 is closed while the contact 20-21 remains closed. It is now a complete circle

produced from the line end B through the normally closed contact 42 of the relay x, the contact 43 ~ 43 ^{a of} the main switching relay J ^A , the resistor 44, the contact 20-23 ° of the panel BB, the contact 19 provided by part 18 of the panel BB and the winding 25 of relay BW to line end C. Therefore relay BW is energized and finger 24 is moved to the left. This action triggers the pawl 23, but the contact 20-24 is closed and the arm 20 is kept in contact with the contact 21. It should also be noted that this action of the finger 24 closes the group of key power control contacts that are located to the right of the finger in the drawing. When contact 20-24 closes, the current flows from line end B through normally closed contact 42 of relay x _3, winding 58 of relay J ^A , contact 20-21 of panel BB _1, contact 19 and winding 25 of relay BW to the end of the line C. The potential gradient across resistor 44 provides an electromotive force sufficient to energize winding 58 across the circuit just discussed. As a result, the main switching relay J ^{A changes} over, so that the contact 43-43 * closes, and since the contact 43-43 ° is now open, the circuit just explained for the winding 25 is interrupted; but this winding is now kept energized over the last specified circle until the relay χ is energized, which is done in the manner to be discussed below.

By closing the contact 43-43 ^ö of relay J ^A , the step magnet FA of the step encoiLtaktes P ^{A is} excited from the end of the line B through the normally closed contact 42 of relay λ-, contact 43-43 * of relay J ^A , the winding of the magnet .F ^A and the normally closed contact 45 of the relay j ^A to. Line end C. This excitation of the magnet F ^A becomes the

- Wheel 33 of the step-by-step contactor is not moved, but rather the normally open contact 48 is closed, so that the line end B is connected to the wheel 33, which is connected to the stationary contact piece 35 in

- touch is located. Each contact piece of the step-by-step contactor is connected to a selected one of the transmitter magnets AD ^X , AD ^Y or AD ^Z , depending on the connections ^{monitored by:} the contacts made by the relay BW of the panel BB. For the sake of convenience, the contacts of the contactor are attached to busbars and the transmitting magnets are also connected to busbars. Cross-connections between these two approaches from the busbar are partly controlled directly by the contacts of the key-operated relay and partly by the location of the switching devices on each panel. The key streams consist of six elements. The first four keystream elements of each keystream are used to select particular substations, and these elements are the same for all keystreams emanating from the same panel; the remaining two elements are used to bring about a particular line on the selected substation and depend on the position of the switchgear of the panel.

If the gradually working magnet F ^{A is} energized, a complete electrical circuit is created from the line end B via the working contact 48 of the magnet F ^A , the contact 33-35 of the step-by-step contactor P ^A , the contact of the key current control relay BW and the winding of the transmitting magnet AD ^Y to the end of the line C. Therefore, the transmitting magnet AD ^{Y is} excited, and by closing the contact 10 of this magnet, the alternating current generator Y is switched on between the lead wires 1 and 3, i.e. a current pulse is sent from the second alternator to the lead wires 1 and 3 to to form first keystream element. If the gradually working magnet F ^{A was} excited, then the normally open contact 46 has closed and the current passed from the line end B through the normally open contact of the magnet F ^A and the winding of the relay i ^A to the line end C. The relay i ^A is therefore energized. Then the relay j ^{A is connected} directly to the line end B through the normally open contact 47 of the relay ^. If the relay j ^{A is} energized, the above-mentioned circuit for .den step magnet F ^{A is} interrupted by opening the normally closed contact 45 of this relay. If the magnet F ^A lets go, it opens the working contacts 46 and 48 and pushes the wheel 43 forward by one step until it touches the contact piece 36. By opening the working contact 48 of the magnet F ^A , the circuit for the transmitting magnet AD ^{Y is opened} interrupted, and the first element of the keystream is terminated. Furthermore, the relay i ^{A is} de-excited by the opening of the normally open contact 46 of this magnet, and this relay in turn triggers the relay j ^A. When the normally closed contact 45 of the relay j ^A is closed again, a complete electrical circuit is created for the step magnet F ^A , and when this magnet is excited, energy is supplied to the transmitting magnet connected to the contact piece 36 (in this case AD ^K ) , so that the

second element of the key stream is produced from a current pulse at the frequency supplied by the alternator X. By the excitation of the magnet F ^A and the relay i ^A and 'j ^A in activity will be in the manner just described is set, but that they excite the magnet F ^A, quit the second pulse of the keystream and the wheel 33 of the stepwise operating contactor p ^{Bring A} into contact with contact piece 37. The process just described is repeated for the third and fourth elements of the keystream; the line circuits can be seen from the drawing (Fig. 1) without needing to be specified in detail. It should be noted, however, that according to the drawing, the third element of the key current is supplied by the alternator Z and the fourth element from the alternator Y. After the fourth element has been delivered, the wheel 33 is in contact with the contact piece 39, and when the magnet F ^A the next time energized, the fifth element is fed to the lead wires 1 and 3 in accordance with the location of the switching device BEr which, as described above, monitors the signals on the station. As can be seen from the drawing, the contact 14-16 of this switching device is closed, so that the fifth pulse of the key stream from the alternating current generator Y is supplied. In a similar manner, the sixth pulse is controlled by the position of the switching device BE ¹ , which now assumes its repositioned position, so that the contact 14-15 is closed. Therefore, the sixth element of the key stream is also supplied by the alternator Y. By the following on the sixth element deenergization of the magnet F ^A the wheel is advanced 33 until contact with the contact piece 41, and at the next excitation of the magnet F ^A, the current flows from the line end B through the normally open contact 48 of the magnet F ^A, the Contact 33-41 of the step-by-step contactor p ^A and the winding 'of the relay χ to the end of the line C. The relay χ is therefore excited; the hold circuit for the relay BW is interrupted by the normally closed contact 42 located on it. This is thus de-excited and releases the finger 24. Since this finger now holds the pawl 23 out of engagement with the arm 20, the triggering of the relay BW allows the arm 20 to return to its original position and the contact 20- 22. Furthermore, by closing the normally open contact 42 of the relay χ, the winding 59 of the relay j ^{A is} excited and the contact 43-43 ″ is closed. By opening the contact 43-43 * of the main switching relay J ^A , the circuit for the step contact F ^{A is} interrupted and the wheel 33 is advanced until it touches the contact piece 35. Therefore relay χ is de-energized and relays i ^A and j ^A are de-energized so that all parts of the apparatus are brought into the position in which they are drawn and the device is ready again to transmit a new key stream to begin the leadership circle.

During the operations just described, the lead wires 1 are obviously and 3 have been fed with a key stream composed of six elements, each element being a current pulse of a selected frequency and the sequence of these frequencies in part through the board from which the stream of keys emanates and partly from the positions the switching devices located on this panel is determined.

It can now be seen from Fig. 2 that each key stream generated at the dispatch point that gets into the line wires 1 and 3 passes through the primary line of the transformer t ^B at each substation. Therefore, current pulses are induced in the secondary line of this transformer, the frequencies of which correspond to the frequencies of the elements supplied in the line wires ι and 3.

Each station is provided with a number of devices which optionally correspond to the various textures of the elements supplied after the conductors. For example, these devices can be ordinary relays connected in the circuits, which are tuned in such a way that they each respond individually to the frequency of the various elements. As can be seen from Fig. 2, the secondary winding of the transformer t ^B supplies energy to the relays BG ^X , BG ^Y and BG ^Z. The circuit containing the relay BG ^X is z. B. matched by means of a choke coil 60 and a capacitor 61 so that it responds to the frequency of the X current supplied by the alternator. The relay BG ^X no therefore only closes its normally open contact by responding to an element coming from the alternator X at the dispatch point. In the same way, the relays BG ^Y and BG ^Z are tuned so that they respond to the frequencies of the frequencies supplied by the alternating current generators Y and Z, respectively. A relay BH is provided which is also supplied with energy from the secondary winding of the transformer t ^B and is arranged to be energized when any key current element enters the line.

processing wires ι and 3 arrives. The relay BH is energized at the beginning of each key stream and remains energized until the end of the same.

Therefore, the relay BH on each station, responding to the key stream just described, is energized at all times during the reception of this key stream, and some of the relays BG ^X , BG ^Y and BG ^Z are energized one after the other in a certain order depends on the sequence of the various current impulses of the various frequencies forming the key stream.

It is desirable to switch the equipment on the remote station in accordance with the sequential operation of the BG relays on that station. For this purpose, a number of receiving relays BN ^1, BN ² , BN ³ etc. are provided on each station, which are switched by the associated relays BG etc. in such a way that they respond selectively to specific key streams. Relays operating in the manner described can be constructed in various ways, and although only one embodiment of the receiving relay is illustrated, the invention is not limited to this particular embodiment.

Figs. 3 to 7 explain in detail an embodiment of the SAT relay which is suitable for use in apparatus according to the invention. This relay has a housing 60 which is provided with a cover 61 and contains a number of step switching magnets and a holding magnet 62 ¹¹ . One of the step magnets 62 ^X , U2 ^Y and 02 ^{Z is} provided for each of the relays G ^x , G ^Y and G ^{z described.} In the embodiment shown, the holding magnet and the step magnets are arranged next to one another on a magnetizable core 63 which is provided with protruding legs 71 (Fig. 6). In this way, certain parts of these legs form parts of the magnetic circles for adjacent step magnets. Furthermore, the receiving relay N contains a rotatable shaft 66 which is held in suitable bearings and non-positively locked by means of a spring 67 in the position shown. A contact arm 68 located on the shaft detects a fixed stop 69. On the shaft 66 there is a number of disks 64 *, 6 <4 ^y etc., each of which has a larger number of notches80 (Fig. 6) is provided, each having a magnetizable block 76 . Between each two magnetizable legs 71 is a T-shaped component (Fig. 7) made of non-magnetizable material, supported in an articulated manner, on the opposite sides of which two are arranged at a distance from one another

Magnetizable fingers 75 are attached, which are on both sides of the associated disks 6a ^x , 64 ^{y and} so on. Each component, together with its associated fingers 75, is applied in a non-positive manner by means of a spring 77 against an adjustable stop 78 (FIG. 6). When the parts take the position shown, fingers 75 are in the vicinity of enlarged pole pieces 72 which are attached to the ends of the adjacent legs 71, but outside of the continuation of the pole pieces. As can be seen from FIG. 6, a block 76 occupies the notch 80 which is located between the fingers 75. If the step magnet 6z ^x is now excited, the part 73 together with the associated fingers 75 is rotated clockwise as a result of the efforts of the fingers 75 to move into the continuation of the pole pieces 72. During this movement, the flux from the magnet 62 * passes between the fingers 75 through the block 76 so that when the fingers move in the manner described above, the disc 64 * is also moved. One of the step magnets each switches a disk in the manner just described. ^{The holding magnet 62 ff shown} in FIGS. 4 and 5 is provided with two upstanding magnetizable legs 79 which end on both sides of the holding disk 64P. This is provided with a number of clamps y6 which are similar to those described for the discs. The clamps of the retaining disk each correspond to a step position of the \ ¥ elle 66, whereas with the disks clamps are only inserted into those notches 80 that belong to the positions in which an excitation of the associated magnet is intended to bring about a forward step of the shaft 66. For example, in the illustration in Fig. 6, the disc 64 * has only two cocks arranged such that that particular disc can only advance the shaft 66 when the winding 62 ^X energizes during the first or fourth element of a key stream will. In order to achieve the adjustment of the clamps 76 , the notches 80 can be partially covered by a retaining plate 65 (Figs. 5 and 6) which is provided with a cutout 91 which can be brought opposite any desired clamp notch for removal or insertion of a block to allow. The parts are set in relation to one another so that when the driving magnets are energized in a prescribed sequence corresponding to a certain key stream, the shaft 66 is rotated by the last element to a position in which the arm 68 makes a fixed contact.

As indicated in Fig. 3, each step magnet is connected to the line ends B and C by a normally open contact 92 of the associated holding relay Ii and a normally open contact of the associated step relay. However, the holding contact is excited by a normally open contact of the holding relay and normally closed contact of all the step relays in series.
The receiving relay shown in the drawings is intended for working key streams with six elements. Is z. B. desired to set the relay shown in Fig. 3 so that it responds to the key stream, which has been placed in the manner described above on the wires 1 and 3, in order to switch the points on the station B , so the Block j6 are placed in the notch 80 of the disk 04 ^y which correspond to the first, fourth, fifth and sixth steps in the rotation of the shaft 66 . Furthermore, a clamp would be inserted into the notch 80 of the disc 64 ^Z which corresponds to the third position, and a clamp would be inserted into the notch 80 of the disc 64 which corresponds to the second position. If the parts are set up in this way, the first element received will energize relays H and G ^Y (Fig. 3). Since the disc 64 ^ has a lever in the first position, the action of the step magnet 62 ^ corresponding to the action of the relay G ^Y causes the shaft 06 to advance by one step. At the end of the first element, the relay G ^{Y is} de-energized, but the relay II remains closed due to its delay, so that the holding magnet 62 ^{11 is} excited; in this way he keeps the shaft 66 in the position up to which it has moved and brings the second notch 80 of each disc up to the position which is to be switched by the associated fingers 75. During the second element the relay G ^{x is} energized, and since the disc 64 * has a block in the second position, the shaft 66 is advanced by another step by energizing the step magnet 62 *. From the above, the operation of the receiving relay N during the following items can be easily understood; it is only necessary to establish that a receiving relay N can only be brought into action in the sense of closing its contact 68-70 if its step magnets have been excited in a certain prescribed manner.

It should also be emphasized that when the receiving relay has been partially activated so that its shaft 66 has moved away from its initial position, and when an element has been received which excites a step magnet for which there is no block in the disc while this key element opens the circuit for the holding magnet. This allows shaft 66 to return to its initial position, which is effective in preventing contacts 68-70 from operating by responding to any key stream other than the particular one for which the receiving relay is intended to operate.

Reference is now made to FIG. 2 again. The relays BN ¹ , BN ² , etc. on station B are set up in such a way that they respond selectively to the key streams that originate on panel BB of the dispatch center. For example, when the handle 27 on the panel BB is moved into its repositioned position, the receiving relay BN ³ located on the station closes its contact 68-70 for a short period of time in accordance with the key stream supplied. During this period of time, current flows on the station from the line end B through the winding 81 of the relay BU, the contact 68-70 of the relay BN ³ and the winding 82 of the relay BL- to the line end C. The relay BL " was already in its repositioned position been energized so that this relay due to the action of the relay suffers J32V ³ no change. now, however, the relay BL? energized in its rearranged direction, and when this occurs, as is the closing Obergurig of contact 83, 83 ^& relay BL ^{Z completes} a line circuit from the line end B through the contact 83, 83 *, the contact 56 actuated by the switches and the winding of the switch relay p- to the line end C ". Therefore the relay p- is excited and then the motor g is driven by current, which flows from the line end B through the normally open contact 84 of the track relay v, the normally open contact 85 of the switch relay p ~, the armature 53 of the motor g, the normally open contact 86 of the relay p ' ¹ and the field magnet 54 of the motor g to the line end C. If this circuit is closed, the motor g works in such a way that the switch tongues 50 move into their changed position. If the switch blades have reached their fully switched position, the contact 56 opens, whereby the circuit for the relay p ^{2 is} interrupted and this relay is allowed to switch off and de-energize the motor g.

If the dispatch officer wishes to return the switches to their home position at the station, he can do this in such a way that he returns the handle 27 on the panel BB to its home position. Here, by the action of the cam 12, the transmission apparatus on the

The dispatch point is put into operation in the same way as previously discussed, and then a key stream is delivered into the line wires ι - and 3, which is identical to the one described above, except that the last element of this key stream is now from an alternator X. delivered current pulse exists, since now that of the handle

ίο 27 actuated contact 14-16 is closed. As a result, the transmitting magnet AD ^{X is} connected to the contact piece 40 of the working contactor P ^{A in} order to produce the last element of the key stream.

If this is received at the station, relay BN ^{1 is} the only relay that closes its contact 68-70. In this case, current flows from the line end B through the winding 87 of the relay BL ^S , the contact 68-70 of the receiving relay BN ⁴ and the winding 82 of the relay BL ² to the line end C. The relay BU remains in its repositioned position; but the relay BL ³ has now been returned to its basic position, whereupon the current flows as follows: from the line end B through the base contact 83 - 83 ^{s of} the relay BL ³ , the contact 57 operated by the switch blades 5 ° and the winding of the switch relay p ¹ to the line end C. If the relay p ^{1 is} energized, a working circuit for the motor g is closed from the line end B through the working contact 88 of the line relay V _1, the working contact 89 of the relay p ¹ , the armature 53 of the motor g, the working contact 90 of the relay p ¹ and the field magnet 54 of the motor g to the line end C. The motor g is then driven in the sense that it flips the tongues 50 against their basic position, and when this is achieved, the contact 57 opens, whereby the Relay p ¹ deenergized and the motor g is stopped.

In the same way, the signals on the station are optionally set by the remaining receiving relays on the station. If the dispatch officer wishes, for example, to set the signal on the station for eastbound traffic to "free travel", he brings the handle 28 to its position on the right. As a result, a key stream is supplied to the line wires 1 and 3, which activates the relays BG ^X , BG ^y and BG ⁷ - on the station in such a sequence that the relay BN ⁶ on the station is energized. When this relay closes its contact, current flows from the line end B through the winding 87 of the relay BL ³ , the contact 68-70 of the relay BN ⁶ , the winding 92 of the relay BL ¹ and the winding 93 of the relay BL- to the line end C. therefore, the \ relay BL ³ and BL ¹ remain in the basic position, and the relay ² is energized BL also in the regular direction. Here, current flows from the line end B through the contact 94-94 "of the relay BL ² , the contact 95 -95 ° of the relay BL ¹ and the winding of the relay q ¹ to the line end C. Therefore, the relay q ^{1 is} excited, and there now the switches 50 assume their basic position, so that the display relay k is energized in the usual direction, the action of the relay g ¹ brings the signal w ² to "free travel". The working circuit for this signal is formed from the line end B by the working contact 96 of the relay v, the working contact 97 of the relay q ¹ , the working contact 98 of the relay k, the contact 99 of the relay k and the drive device of the signal w ² to the line end C.

First of all it is assumed that the points 50 at the station are in their changed position and that the dispatch officer moves the handle 28 to its position on the right in order to set the signal for eastbound traffic to "free travel". The key current pulse, which is then supplied by the panel BB , sets the relay BN ⁵ into action. Here, current flows from the line end B through the winding 21 of the relay BL ³ , the contact 68-70 of the relay BN ^S , the winding 92 of the relay BL ² and the winding 93 of the relay BL ² to the line end C. As a result, the relays BV- and BL ² both energized in the usual direction, and the relay BL? is energized in the reverse direction. Current then flows from the line end B through the contacts of the relays BL ¹ and BL ² to energize the relay q ¹ in the manner described above. However, since the switches occupy now their upgraded location, the indicator relay is k in the reverse direction energized, and the now completed signal drive circuit passes from the end of the line B by the contact of the relay v, the normally open contact 97 of the relay q is ^1, the normally open contact 98 of the relay k, the break contact 99 of the relay k and the drive mechanism of the signal w ¹ to the end of the line C.

In the same way, the operator of the handle 28 located on the panel BB ^{activates the relays SiV 1} or BN ² on the station to release a signal blocking the west direction, depending on whether the switches on the station are in the basic position or have been changed. The action of one or the other of the relays BN ¹ or BN ² causes the relay q ² to be energized. The circles are similar to those seen for the circuit of the rice is q ¹ \ Or. Furthermore, if the re-

lais q- is excited, a working circuit for the signal w ³ or for the signal ze / ^{4 is} closed, depending on whether the display relay k is excited in its changed position or in its basic direction.

It should be noted that every key pulse generated at the check-in point a message regarding the positions of both the switch lever and the signal lever

ίο on the associated board. In addition, this message is transmitted to the remote stations so that the The device on the remote station is always attached to the table with the positions of the devices of the dispatch center. An advantage of this arrangement is that only one Keystream is necessary to get from any state of the apparatus on the remote station to any other state. As a result, will achieves a saving in the total time the line is in use is located.

To inform the dispatcher of the condition of the devices on each remote station, each panel is provided with indicator devices (referred to herein as electric lamps) which are switched in accordance with the positions of the devices on the most remote station. To effect the switching of these display devices, display key streams similar to those described above are used and transmitted from each remote station to the dispatch center. These key streams consist of elements of different frequencies. In order to avoid the need to provide a number of similar alternators X, Y and Z on each remote station, an additional line wire 2 is sufficient from the dispatch point to each remote station. The alternators X ₁ Y and Z are all continuously switched on via the line wires 2 and 3 at the dispatch point. One of the relays AG ^X , AG ^Y or AG ^Z is connected in series with an alternating current generator and tuned so that it only responds to its frequency. For example, the relay AG ^{X is} connected to • the alternator X via the line wires 2 and 3 in series and by suitable * means, e.g. B. a choke 133 or a capacitor 134, tuned so that it operates in resonance with the alternator.

For the purpose of activating the relays AG ^X , AG ^Y and AG ¹ optionally from any remote station, each remote station is provided with a number of transmitter magnets, each of which is arranged so that, when it is excited, establishes a shunt path via the line wires 2 and 3 on the remote station, which is such that it is tuned to the frequency of the current which is supplied by a particular one of the alternators at the dispatch point.

In particular from Fig. 2 it can be seen that each of the transmitting magnets BD ^X , BD ^Y and BD ^Z is effective on the station when it is excited in such a way that ^{it follows a coordinated path d x} , d ^Y , between wires 2 and 3. d ^z , each of which includes a capacitor 21 and a reactance 122. The coordinated paths are individually coordinated so that they respond to the frequencies of the current supplied by the alternating current generators λ ", Y and Z; as a result, when the transmitter magnet BD ^X on the station is excited, the relay AG ^X on the dispatch point energized. in the same manner of the transmission magnets BD ^y the transmitting magnets pulls upon excitation at the station, the relay AG ^Y on the clearance point and upon energization of the relay BD ^Z on the station, the relay AG ^Z at the clearance position at. on the station to be in a certain sequence energized by means of a step-by-step contactor PB , which is similar to the step-by-step contactor located on the dispatch point, apart from the fact that in the present embodiment the step-by-step contactor PB has an additional contact piece 119 so that display key streams can be composed of seven elements instead made up of six elements like this is the case with the switching key currents. This additional element is introduced into the display keystrokes for the purpose of bringing certain messages to the dispatch center which cannot be transmitted by means of a keystream made up of seven elements.

The sending of the display key streams from the station to the dispatch point is started with the reversal of the main switching ^{relay J B} , which usually takes the basic position in which it is shown in the drawing. It is switched by a number of polarized indicator relays r ¹ , r ² , r ^s and so on. The display relays r ¹ and r ² are switched in accordance with the position of the switches 50 on the station. The display relays r ³ and r ⁴ are combined with the display of the positions of the signals on the station. The display relays r ⁵ and r ⁶ are partly switched by the line relay υ on the station and are used to control the dispatching

IO

to notify government officials when a train that has taken section ab leaves that section.

Since display keystreams can originate at any of a number of stations, it is evident that precautions must be taken to prevent interference originating at different stations. For this purpose, an inhibiting and locking device is provided on each station, which comprises the common wire 3 and an additional wire 4 extending between distant stations. Since this wire 4 is only used for inhibiting and locking between remote stations, it is not necessary to continue this wire to the dispatch point. The station is provided with a relay S ^B , a line relay R ^B , a motor relay M ^B , a delay relay K ^B and an additional relay T ^B , and each of the other remote stations is provided with similar apparatus. At each of the stations behind station B , the line relay, for example the relay on station C, which is denoted by R ^c in FIG. 2, is connected in the line 3 in series with its associated battery and the relay S ^c . At the end of the route behind the last station, the route lines 1, 3 and 4 are connected to one another, so that all the route relays R ^B , R ^c etc. each with its associated battery 104 one behind the other in a closed circuit that includes the route lines 3 and 4, are switched as long as all relays S ^B , S ^c etc. are de-energized, which is usually the case. The relay T ^c on station C corresponds to the relay T ^B on station B. Each relay S ^B etc. is usually de-energized and in these circumstances each line relay is in series with the line wire 4 through a normally closed contact 105 of the associated relay and with a battery 104 so that the line relays are all usually energized. The relay T ^B is usually de-energized, and the relays M ^B and K ^B are also usually de-energized.

If the main switching relay I ^{B is} energized in the reverse direction, the inhibiting and blocking apparatus on the station is activated. At the end of each inhibiting and locking operation, when the relay F ^{B is} energized, the transmission device is activated so that it supplies a key stream into the lead wires 2 and 3.

Now the activity of the inhibitor

and locking apparatus described in detail.

If the relay J ^{B is} energized in the reverse direction, the relay S ^B picks up; The circuit for this relay goes from the line end S through the normally open contact of the relay R ^B , the normally closed contact ι ο ι of the delay relay K ^B , the winding of the relay S ^B and the normally closed contact 102-102 * of the main switching relay J ^B to the line end C It is closed note that relay S ^B can only be energized when the line is free, ie when no other remote station is supplying a key stream to the line circuit; for under these circumstances, as will be explained further below, the usually closed line circuit containing the line wires 3 and 4 is open and the relay R ^B is deenergized, so that the circuit just referred to is open. Furthermore, the closing of the relay S ^B guarantees that the line has been cleared for a certain period of time, because when the relay R ^{B is} de-energized, the relay K ^{B is} energized and because this relay trips slowly and keeps its normally closed contact open to to prevent the circuit for relay S ^{B from being closed} for a brief intermediate time after relay R ^{B has} been re-energized. If the relay S ^{B is} energized, so that there is a guarantee that the line circuit is released for a certain time, then the opening of the normally closed contact 105 of the relay L ^B disconnects the line wire 4 from the entire stations that are used by the dispatch center are further away than the station B. Meanwhile, a local circuit for the relay R ^{B is closed} by the normally open contact 105 of the relay S ^B and the normally closed contact 109 of the relay T ^B. Closing the relay S ^{B also} completes a circuit for the relay T ^B , which now picks up. This circuit goes from the line end B through the normally open contact 100 of the relay R ^B , the normally closed contact ro ι of the relay K ^B , the winding of the relay T ^B and the normally open contact 103 of the relay S ^B to the line end C. When the relay T ^B picks up, interrupts it with its normally closed contact 109 the circuit for the relay R ^B , so that this relay releases. When the relay R ^B closes its normally closed contact 100, the working circuit for the relay K ^{B is} closed, and this relay picks up. The no closure of the relay K ^B interrupts the circuits for the relays T ^B and S ^B and completes a holding circuit for these two relays in series from the line ground C through the normally open contact 103 of the relay S ^B , the winding of the relay T ^B , the winding of the relay S ^B and the normally closed contact 102-102 * of the relay T ^B to the end of the line C. As a result of this holding circuit, the relay S ^B keeps its normally open contacts closed; but the relay T ^B acts quickly and closes its normally closed contact 109. Here the relay R ^B picks up,

provided that the line is free, and then a circuit for the motor relay M ^{B is} closed from the end of the line B through the working contact ioo of the relay R ^B , the working contact ioo of the relay K ^B (which is now de-energized, but still holds because of its delay ), the winding of the relay M ^B and the normally open contact of the relay S ^B to the end of the line C.

ίο Therefore the relay M ^{B is} energized and completes a delay circuit for the relay S ^B from the line end B through the normally open contact io8 of the relay M ^B , the winding of the relay S ^B and the normally closed contact IO2-IO2 ^{6 of} the relay J ^B to. Line end C Therefore, the relay S ^B remains in its energized state. Furthermore, a delay circuit is now closed for the relay M ^B , which contains its own normally open contact 107 and the normally open contact 106 of the relay S ^B. As a result of the closure of the motor relay M ^B , the relay T ^B also picks up and feeds the relay M ^B by means of the make contact 108 and the relay T ° via the make contact 103, so that the relay T ^B opens its break contact 109 and de-energizes the relay R ^B. Therefore the relay R ^B opens and keeps the relay K ^B energized, and in this state the apparatus remains during the transmission of a key stream. It should be noted that the relay M ^{B is} not energized unless the relay R ^{B is} energized, which indicates that the line forward is free and when not the relay S ^{B is} energized, this indicates that the Line behind the station is blocked.

When the motor relay M ^B is energized, a circuit for the step magnet F ^{B of} the step-by-step contactor P ^{B is} completed from the end of the line B by the make contact 111 of the relay M ^B , the winding of the step magnet F ^B , the break contact 112 of the relay j ^B and the motor contact 102- io2 ^{& of} the main switching relay J ^B to the line end C. Then the transmission apparatus is set in operation so that it supplies a display key stream to the line wires 2 and 3.

In discussing the operation of the display apparatus, assume that all parts of the apparatus assume the positions in which they are drawn and that the switches 50 on the station are moved to their repositioned position. At the beginning of this adjustment of the switches, the relay k is de-energized, and then current flows from the line end B through the normally closed contact 113 of the relay k, then in parallel through the winding 114 of the relay r ¹ and through the winding 115 of the relay? ' ² to line end C. In this way, relay r ¹ is energized in the reverse direction and relay r ² in the ordinary direction. When the switches 50 reach their fully switched position, the relay k is energized in the opposite direction, and then the relay J ^{B is} energized in the opposite direction by means of a current which flows from the line end B through the normally open contact of the relay k, the normally closed contact 116-1 i6 ^b of relay r ¹ , winding 117 of relay r ² and winding 118 of relay J ^B to end of line C. Closing this circuit returns relay r ² to its shifted position and then energizes relay J ^B in the opposite direction. By this action of the relay J ^B , the inhibiting and locking operation described above is started, and when the line 4 is free, as is the case when no other remote station is about to transmit a display key stream, the relay F ^{B is} energized . Then, current flows from the line end B through the normally open contact 120 of the magnet F ^B, the contact 33-35 of stepwise working contactor P ^B and the winding of the transmitting magnets BD ^Z to the end of the line C. Therefore, the transmission is magnet BD ^Z energized so that it switches on the coordinated path d ^z between the lead wires 2 and 3, whereby the relay AG ^{Z picks up} at the dispatch point. Another result of the closure of the magnet F ^B is the energization of the relay i ^B. As a result of the closure of the. Normally open contact 133 of relay i ^B attracts relay j ^B , whereby it opens the circuit for magnet P ^{B via contact 112.} This lets go and advances the step-by-step contactor P ^B to the next position. This process continues in the same way as the process described in connection with the device at the dispatch point. Each position of the incremental contactor produces a different element. The sequence of these elements is determined by the connections between the transmitting magnets and the contact pieces of the contactor working step by step. The first four elements are all of the display key streams arising for all of the same station and are used to select the appropriate panel on the dispatch point. However, the fifth element of the key stream is r by the relay ⁶ in accordance with the state of the route section from controlled. As can be seen from the drawing, the relay r ^{6 is} in the basic position, so that when the contact 39 of the step-by-step contactor PB is closed, the transmitting magnet BD ^{Y is} excited so that it

lais AG ^Y gets dressed at the dispatch point for the fifth element. Similarly, the sixth element is controlled in accordance with the positions of the signals on the station, and since these signals are all on "stop", relay r ⁴ is energized in the reversed direction and contact 40 is the stepping contactor connected to the transmitting magnet BD ^Y , so that the sixth element of the key stream brings the relay AG ^Y to the dispatch point to respond. The seventh element of the display key current is controlled in accordance with the position of the switches, and in the present case the contact piece 119 is through the normally closed contact I25-I25 ^{6 of} the relay r ² , the normally open contact 126 of the relay k and the normally closed contact 127 of the relay k with the transmitter magnet BD ^Y connected. Therefore, the magnet BG ^{Y is} excited during the seventh element, so that the relay AG ^{Y picks up} at the dispatch point. It should be noted that if the transmitting magnet BD ^{Y is} energized during the last element of the key stream, the winding 128 of the relay r ^{1 is} also energized, causing the relay r ¹ to return to its home position. The relay r ¹ is therefore used to store the displays delivered by the movement of the relay k in accordance with a changeover of the points until the corresponding display effect has been delivered to the dispatch point. At the end of the seventh element of the key stream, contact 33-41 of contactor P ^{B is} closed and the next time the magnet is energized, current is supplied to winding 134 of relay J ^B , thereby returning this relay to its home position. Upon this occurrence, the intermittent magnet F ^{B is} de-energized, thereby advancing the wheel 33 by one step to close the contact 33-35 and enabling the apparatus to begin delivering another indicator key stream. Furthermore, by opening the contact 102-102 * of the main switching relay J ^B, the reset circuit for the relay S ^{B is} opened, which then releases and de-energizes the relays M ^B and T ^B. By de-energizing relay S ^B , the normal line circuit is restored, and when the line is free, relay R ^{B is} energized and relay K ^B drops out. to bring the apparatus to its normal state.

Reference is now made again to FIG

taken. The relays AG ^x , AG ^Y and AG ¹ control a relay A ^H which is energized when any of the three relays just mentioned has been energized. The dispatch center is also provided with a number of receiving relays AN ¹ , AN ² , etc., each of which is similar to the relays arranged on the remote stations, except that the relays on the dispatch center which are used to work on the basis of display key streams with seven elements are intended to have seven positions each in one of the disks for the magnetic block 76 . For the sake of saving, it is advisable to have all of the end components for the display key streams generated at all of the stations in common for each individual message that is received from remote stations. For example, the display “Switch switched” is made up of four elements, the first four of which are distinctive for each station and the last three for all. Stations are the same. By this means, a single relay can be applied which responds to all display key streams containing the three elements corresponding to a "switch switched" key stream, and by using a special receive relay for each panel, the station can which the display keystream originated can be distinguished. As can be seen in Fig. 1, a receiving relay B " is arranged to respond to any display key stream arising on the station, and when contact 68-70 of that relay closes an auxiliary relay / is energized. As relay B" is set to respond to any display keystream created in the station, this relay will be energized by responding to the keystream just described. This display key stream also activates the relay AN ¹ . Since the relay / is now energized, the closure of the contact 68-70 of the relay AN ^{1 completes} a circle from the line end B through the winding 135 of the relay ^ fL ² , the winding 136 of the relay AL ¹ , the working contact 137 of the relay f and the contact 68 of the relay AN ¹ to the end of the line C. The closure of this circuit has no effect on the relay AL ² ; but the relay AL ¹ is energized in the reverse direction, and then current flows from the line end B through the contact 138-138 ° of the relay AL ² , the normally closed contact 139-139 * of the relay ^ iL ¹ and the lamp 30 to the line end C. Therefore the lampeso lights up, and since the lamp 29 has been extinguished by the reversal of the relay AL ¹ , the lighting up of the lamp 30 gives the dispatch officer a positive indication that the points have been set

now assume their opposite position on the station. "

If the switches 50 are now returned to their basic position on the station, the relay k is energized at the beginning of this movement; then it energizes winding 114 of relay r ¹ and winding 115 of relay r- and causes relay r ¹ to energize in the reverse direction and that

to relay r- for excitation in the ordinary direction. If the switches have fully reached their basic position, the subsequent excitation of the relay k is completed by current from the line end B through the normally open contact 113 of the relay k, the normally closed contact 116-116 ″ of the relay r ¹ , the winding 117 of the relay r ² and winding 118 of relay J ^B to line end C flows. Then the relays r- and J ^{B are} energized in the reverse direction, and by this action of the relay J ^B the described inhibiting and locking process is started. At the end of this process, the step magnet F ^{B is} energized in order to deliver a display key stream in the manner described after the dispatch point, apart from the fact that its first element is generated by the action of the transmitting magnet BD ^X. Under these conditions, the circuit for the transmitter magnet goes from the line end B through the normally open contact 120 of the step magnet F ^B , the contact 33 of the relay 119, the contactor BB, the contact 125-125 ^{& of} the relay r, the normally open contact 126 of the relay k, the Contact 127 of relay k and the winding of the transmitter magnet DB ^X to the end of the line C The circuit just described is provided with a junction that goes from the normally closed contact 125-.125 * of the relay r- through the winding 128 of the relay r ¹ to the end of the line C. Therefore, relay r ¹ is energized in the ordinary direction so that at the end of the display keystream it will return the display relays to their original states.

The display key stream delivered to the dispatch center in this way sets the relays AG ^X , AG ^Y and AG ¹ into action in a certain order with the result that the relays B " and AN ^{2 are put} into action. These relays do not work sooner than until the last element of the key stream has been received, when this occurs the relay / is energized and then an electrical circuit is established from line end B through winding 135 of relay ALr, winding 140 of relay AL ¹ , normally open contact 141 des Relay f and contact 68-70 of relay AN ² closed to line end C. Relays AL ³ and AL ² are thus both energized in the usual direction, thereby extinguishing lamps 30 on panel BB and switching on for lamp 29 Complete the circuit from the end of the line B via the contact 138-138 "of the relay ^ 4L ² , the contact 139-139" of the relay AL ¹ and the lamps 29 to the end of the line C. Therefore, the lighting of the lamp notifies you n 29 informed the dispatch officers that the switches at the station are in their normal position.

As will be discussed later, a display keystroke can be started on the station by other means than by moving the switches 50. However, each display keystroke to the dispatch point brings a complete message about the status of all the apparatus on the station where the keystroke originated is. If a display key stream has been sent by the station when the points were not blocked, i.e. when the points did not occupy one or the other of their outermost positions, the display relay k is de-energized, so that the relay r ¹ in the reverse direction and the Relay r ~ is energized in the ordinary direction. Under these circumstances, the last element is brought about by energizing the transmitting magnet BD ^Z. The display key stream delivered to the dispatch point in this way energizes the relays BN and AN ³ , whereupon a circle is completed from the line end B through the winding 142 of the relay AL, ² , the normally open contact 143 of the relay / and the contact 68-70 of the relay AN ³ to the. Line end C. Then the relay AL? energized in the reverse direction, and the circles of the two lamps 29 and 30 are interrupted 138-138 "of the relay at the contacts. In these circumstances _1O o stands the two lamps remain extinguished 29 and 30, whereby they inform the clearance officials of which, that the points on the station are not locked.

It is now assumed that the position of a signal on the station changes, e.g. B. it is assumed that the signal relay q ^{1 is} energized to clear a signal for eastbound traffic. By energizing the relay, a circle is completed from the line end B through the normally closed contact 144 of the relay q ² , the normally open contact 129 of the relay g ¹ , the winding 130 of the relay r ⁴ , the contact 131-131 ″ of the relay r ³ and the winding 118 of relay J ^B to end of line C. As a result of the resulting reversal of relay J ^B , the station begins supplying an indicator key stream, and since relay f ^{1 is} now energized in the usual direction, energizing relay BD ^{X will} cause the sixth element of the keystream

put forward. Upon receipt of this key current on the handling spot the relay AL ³ are energized in the normal direction, so that it closes the contact I45-I45 ^e. Then the lamp 31 is extinguished and the lamp 32 comes on, thereby informing the dispatch officer that a signal on the station has been set to "free travel". All of the displays would have been received if the relay q- had been energized on the station, so that the display would not tell the dispatch officer which signal was indicating "clear travel". Meanwhile, by observing the position of the handle 28, he can determine the direction of the traffic that has been cleared at the station, and by observing which is illuminated by the lamps 29 or 30, he can determine the position of the points and therefore that of the signals determine which one is set to "free travel". In the display key stream just described, the last element is controlled in accordance with the position of the switches. The 'receiving relays at the dispatch point are expediently designed in such a way that one of the relays AN ¹ , AW or AN ^{3 is} activated simultaneously with the relay AN * , which depends on the position of the switches on the station.

If the relay φ is deenergized again, e.g. B. after return of the signal on the station in its holding position, a display key stream is delivered, the sixth element of which has been produced by excitation of the transmitting magnet BG ^V , and this key stream energizes the relays AN ⁵ and B ⁿ . In addition, one of the relays AN ¹ , AN ^S or AN ^{3 is} activated, which depends on the position of the switches on the station. When the relays AN ⁵ and B "are energized, the relay AL? During the transmission of the sixth element of the display key stream from the station, one or the other winding of the relay r ³ is connected in parallel to the transmitter magnet, which is energized, so that this relay with the display key stream, which is delivered is matched.

The section relay ν switches the relay r '

and r ° in a similar way as the relays r ¹ and r ~ are switched by the relay k , naturally apart from the fact that no polarized contact occurs in this circuit on the relay ν. Without needing to explain the process in detail, it is evident that when the relay ν is excited, the fifth element of the key stream generated at the station is produced by the excitation of the transmitting magnet BD ^V. However, if the relay ν is deenergized and z. B. after the departure of a train from the portion from energized again, so the main switching relay J ^B is energized in the reverse direction and sent from the station, a key stream, the fifth element has been brought about by energization of the magnet ^K BD. This display key stream is sent to the relays AN ⁶ and B " on the production station. In practice, it is customary to indicate the passage of trains through the point of the track controlled by an apparatus according to the invention on a graphic recording strip over the display by lamps on the control board. Therefore, a graphic recorder is provided which has a magnet 146 which sets a spring 147 which operates on a movable recording board 148. When the relays B " and An ^{6 are} energized, the Magnet 146 on the graphic recorder is energized by the normally open contact 149 of the relay / and the contact 68-70 of the relay AN ⁶ .

It is therefore evident that in the case of the apparatus according to the invention, the dispatch officer a complete record of the condition of all apparatus at all times on every remote station. This message is presented in its entirety transmitted by means of the key streams that are not by the lengths of elements and also not distinguished by the number of pulses in different elements are, but rather by the succession in which its elements are of different textures be placed on a management team. An advantage of these peculiarities is that all the elements have the same lengths and that the length of an element can be very short. There is only a requirement that each element lasts for a time sufficient to activate the relay, which optionally responds to this element. In practice it has been found that relays that respond selectively to the frequency of the currents for key stream elements can be made to operate reliably due to elements of the order of magnitude lasting an eighth of a second. It is evident that one on this principle working system, the time used for each key stream is relatively small

and that a large number of displays over a single pair of lead wires can be sent in a relatively short time.

It should be emphasized that while for the purpose of illustration only a single embodiment the key energizing relay which can be used has been described and drawn; this particular one

ίο embodiment of the relay is not essential; rather, their task can be performed by any similar apparatus will. In the same way, the invention is not limited to the use of a step

wise working contactor limited by the type described, rather any other step-by-step device can be used in place of this engine will.

It is also evident that the real circuitry is on the remote station through the receiving relay and the specific switching of the display apparatus through the Feedback relays on the dispatch point can be modified to suit local conditions to be sufficient, and that the circuit diagrams disclosed here are merely illustrative are drawn.

In describing the invention it has been assumed that four elements of the Keystream can be used to perform station selection. When using of four elements for this purpose, each of which has any of three frequencies the system can operate on a total of 81 remote stations and can be used with a corresponding number of panels. However, it is evident that by Changing the number of items or changing the number of items for each Element available frequencies a greater or lesser number of stations and Panels can be switched across a single pair of lead wires.

Claims (10)

Patent claims: i. Remote control, in particular for setting points and signals from a central monitoring desk using two continuous control lines and one continuous feedback line, to which key streams are supplied which consist of a number of pulses of equal length but different in their electrical properties, characterized in that at each of several intermediate receiving points (substations) connected to the continuous control lines, each of which controls a certain number of devices to be finally controlled, two main receiving switching devices (relays BH, BG ^X - ^Z ) connected in parallel and fed by the continuous control lines are arranged, one of which (BH) responds to each pulse, the other or the other responds only to one or more selected pulses of variable frequency, in such a way that by the combined action of the two types of receiving device en the selection of the intermediate receiving point (substation) and the route device located on it to be finally controlled and its actuation takes place. 2. Remote control according to claim 1, characterized by a number of current sources located at the monitoring point (X, Y, Z) of alternating current or of periodic current of different frequency and by devices (P ^'A, AD ^X, AD ^Y, AD ^Z) for successively the all or some of the current sources (X, Y, Z) for short inter- ⁸ S intervals to a transmission line (1, 3) to connect the after a number of devices (BG ^x , BG ^Y , BG ¹ ) on each of the locations to be controlled is enough, each of these devices is optionally tuned so that it only responds to current of a particular frequency, while others respond to one of these Devices located in places (BN ¹ , BN ² , BN ³ etc.) each respond to a particular sequence in which the first-mentioned devices (BG ^X , BG ^Y , BG ^Z ) are activated. 3. Remote control according to claim 2, characterized in that the device (52V ¹ , BN ² , etc.) located on each one to be controlled, which responds optionally to the sequence of the activity of the devices (BD ^X , BD ^Y , BD ⁷ -) , an adjustable member (switching mechanism 66) which is arranged so that it can be operated in a series of steps which must be carried out in a previously described, for the particular device distinctive sequence, so that the switching mechanism (66) at the end of the Keystream reaches a final position or a final state in which the process desired at this point is carried out. 4. Remote control according to claim 1 to 3, characterized by one or more manually operated switching levers (27, i6 28), which are set up in such a way that, when they are adjusted, they bring about the operation of a step-by-step contactor (P ^A ) or the like, causing a number of alternating current generators (X ₁ Y ₁ Z) of different frequencies, To deliver current in a prescribed sequence to a control line (1, 3), which leads to the substation that controls the switches and signals to be set, whereby the currents received there are switched in such a way that they optionally responding relays (BG ^X , BG ^Y , BG ^Z ) , which in turn drive receiving relays: (BN ¹ , BN ' ¹ , BN ³ , etc.) , by means of which the adjustment of the switches or signals is brought about. 5. Remote control according to claim 4, characterized in that a panel (BB, CC ₁ DD) is provided at the monitoring point for each station to be controlled, the lever (27, 28) operated by Hai \ d for controlling the devices located on the station together with display devices (29,30,31,32) controlled by a display key stream sent to them from the remote station. 6. Remote control according to claim 4, characterized in that by operating the control handles (27, 28) the conversion of a polarized main switching relay _ (J ^A ) and the connection of a number of contacts (35, 36, etc.) of the step-by-step contactor ( P ^A ) is brought about with the exciting windings of transmitting magnets (AD ^X , AD ^Y , AD ⁷ -) in a prescribed grouping, such that the main switching relay (J ^A ) causes the intermittent excitation of a magnet (F ^A ) and thereby the step-by-step contactor (P ^A ) rotates in a series of steps so that it energizes the transmitting magnets (AD ^X , AD ^Y , AD ^Z ) in a corresponding sequence, whereupon the transmitting magnets (AD ^X , AD ^Y , AD ^Z ) each one Connect alternators (X, Y ₁ Z) in the same sequence with the transmission line (1,3). 7. Remote control according to claim 5, characterized in that devices are taken to automatically prevent a display keystream on the Transmission line extending between the transmission point and the point to be controlled (1,3) is transmitted as long as another display keystream is being broadcast he follows. 8. Remote control according to claim 7, characterized in that an additional line (4) is provided which extends between the .sämliche controlled stations and usually with the transmission line (3) on one station each by a power source (104) and a line relay (R ¹¹ ) is connected, while a relay (S ^{! S} ) which is energized when the main switching relay (J ¹¹ ) is energized in the reverse direction to transmit a display key is arranged to connect the auxiliary wire (4) separates from the wire (3) and thereby the circle of those located on two distant stations. Line relay (R ^c etc.) interrupts in such a way that the de-energization of this relay prevents the activity of the two contact gelers, which work step by step and which are located on these stations. 9. Remote control according to claim 3, characterized in that the device 04JV ¹ , AW ... BN ¹ , BN- , etc.), which responds to the sequence of the activity of the other devices (AG ^X , BG ^X , etc.), a rotatable shaft (66) which ^{carries disks (64 ^ 64 y} , O4 ^Z ), on each of which magnetic elements (76) are arranged in prescribed positions and are operated so that they move the shaft (66) step by step by means of stationary electromagnets (62 ^X , 02 ^Y , 02 ^Z ), the excitation of which is controlled by the other devices (AG ^X , BG ^X , etc.). 10. Remote control according to claim 9, characterized in that the rotatable shaft (66) is rotated against the action of a return spring (67) and is held on each step by a disc (64 ^) having magnetic elements (76) which with a holding magnet (H) cooperate, the excitation circuit of which is closed only during the time intervals between the excitation of the other magnets (AG ^X , AG ^Y , etc.), in order to prevent the shaft (66) from moving back with each step, which rather only happens when the excitation of the magnets (AG ^X , AG ^Y , etc.) is carried out in the appropriate sequence. For this purpose 2 sheets of drawings