DE322105C - Circuit arrangement for telephone systems, in which calling lines are connected to connecting circuits by means of automatic switching mechanisms - Google Patents

Description

Circuit arrangement for telephone systems in which calling lines be connected to connecting circuits by means of automatic switchgear. The invention relates to a circuit arrangement for telephone systems in which calling lines are connected to the first group selector by means of automatic switching mechanisms Ending connecting circuits are connected and in which one is arranged in the office so-called register of a calling line is accessible and the setting of the first group selector.

Such circuit arrangements for telephone systems are known, where the register is associated with the calling line through call seekers is brought, which has the disadvantage that the participant with the delivery the power surges must wait until the call seeker disconnects the caller Established management and register.

To avoid any loss of time by the call seeker in making a To avoid a connection between two participants) but at the same time the advantages maintain the call seeker and make better use of the registry facilities to achieve, the arrangement is made in the subject invention such that on the one hand, in a manner known per se in automatic telephone systems, the connection the register device takes place directly to the subscriber line and on the other hand between group selector and register device in the setting regulating circuit a call finder e! nge! is switched, which is first controlled by the register so that during the recording of the Strotnimpulse by the register simultaneously the calling line is searched for by the caller and the impulses can be passed on immediately.

According to the invention, provision is also made that after setting, according to the number of a required subscriber line, the Register device during the period in which it carries out its electoral recruitment activity, removed from the possibility of influencing the calling subscriber is. This can be achieved in a number of ways; in the one described below Embodiment comes after completion of the registration an isolating relay Effect which the calling line mechanically moves from its to the registers and Voters leading turnoff separates.

Furthermore, the invention provides means by which a calling Leitunfr immediately after the allocation of a reference works for calls occupied appears while simultaneously through call seekers who as a result of the same Process can come into effect, remains selectable, with the viewfinder after setting a busy potential on the line at the multiple switched test contacts of the line holds up against both other calls and the setting of other seekers, after the register has been disconnected. With the particular one described below Embodiment was a normal between one Battery and Relay located in the line circuit is provided for each line, which when it closes of the line circuit at the subscriber station responds and thereby a register relay brings into effect, which a register switches directly to the line. It appears desirable to use this line relay during registration, the election and- not to leave the conversation in permanent contact with the subscriber line; Therefore, an isolating relay was used, which switches off the line relay after it did its job. A novel feature of the present invention is in influencing this isolating relay by alternating circuits that come into effect, the first of which comes into effect when a register is connected to the line is while the second is established when a viewfinder is connected to the line is. This second circuit is maintained after the register works Has done work and been severed.

The stopping of a viewfinder on the connection contacts of a line is advantageously controlled by a test relay of the seeker, that, in such a connection with the viewfinder and the circuits assigned to it stands that it is alternately over successively produced test current loop of the lines connected to the viewfinder and one produced by means of a breaker or contact mechanism belonging to the viewfinder Circuit is affected. The mentioned test circuits are to be connected accordingly Test contacts of all viewfinders serving the lines of a group in multiple connection connected and usually closed. However, if a line calls, it will Test circuit is opened until a viewfinder has adjusted to it (e.g. through the effect of the same relay that switches a register to the line) - That The test relay, which controls the working circuit of the seeker, is connected to a test brush connected and is after starting the viewfinder over the coated test contacts and the breaker continuously draw power until it reaches the calling line is. Since their test circuit is open, the test relay now becomes the drive circuit interrupt the viewfinder. The circuit across the breaker making a branch forms the circuit led via the test relay and the test brush advantageous not only for securing the test relay excitation during the transition of brushing from one contact set to the next, but also to secure one Precise adjustment of the # 5uchbrushes to the connections of the calling line. Therefore, this branch circuit is arranged so that it is through the movement the viewfinder brush activated breaker is closed, which acts so, that the branch circuit is only opened when the brushes are exactly on the connection contacts of a line are set. The finder test circuit can may also be used for an alideren purpose, such as B. for switching on a call counter or the like that is normally connected to the test circuit, but preferably only by applying a certain current to the circuit Apparatus assigned by the voters under suitable conditions in operation is set.

In your particular system to be described below, a special busy circuit is provided in connection with each line, which prevents a line from being called by any other line while it is busy. This test circuit ends in multiple switched test contacts in all line selectors that have access to the line. These contacts are usually supplied with a potential via the isolating relay from a battery, which regulates the connection of the line relay. The test relay of the line selector only responds to the full normal potential at the test contact, and a line appears to be occupied when the potential is reduced. In the case of a line in a connection that is calling, the line selector creates a branch from the test contact, which reduces the test voltage. Such a busy check is already known per se. The invention now provides means whereby the busy test occurs immediately after a register is switched on when the line calls. As can be seen from the example, the same relay that switches the calling line to a register can make it selectable for a searcher but not selectable for a line selector. It can also be seen that this is achieved in that the energized relay keeps a branch open, which usually starts from the "calling test contacts" of the line and closes a branch to the multi-switched "busy test contacts". The branch line may simply from the one 9 test circuits are switched to the other, and when it is turned to the Besetztprüfleitung the subscriber, it will also serve to - produce the circuit of the isolation relay which shuts down the line relay. In order to maintain the voltage reduction at the busy test contacts (i.e. to keep the isolating relay energized after the relay occupying the register * has been de-energized and the register has been disconnected, another branch from the busy test wire of the calling subscriber can be made using a special brush of the viewfinder are made, which is in contact with a connection located in the contact field of the viewfinder, which is connected in a multiple circuit with the test circuits.

Various of the inventive features mentioned above are readily apparent can also be used with telephone systems with semi-automatic operation.

Show from the embodiment shown in the drawing FIGS. i to 4 schematically show the arrangement of the system, namely FIG. 1 shows the intercom and directing the calling party and the transmitter device to his / her station; Fig. 2 shows a call searcher serving a line group to which the subscriber line (Fig. I) belongs, as well as the connection circuit and the group selector to which the Call finder is assigned.

3 illustrates a line selector with the associated devices, as well as one of the lines which can be reached by the line selector and which represent the required line.

Fig. 4 shows a complete register and setting mechanism with one Distribution switch and those parts of a second register that are sufficient to make the relationships between the works recognizable.

FIGS. 5 to 8 show the register of FIG. 4 in detail and show its structural design to a sufficient extent for understanding.

The schematic representations of FIGS. I to 4 are to be combined in such a way that FIG. 2 lies between FIGS. I and 3 and FIG. 4 under FIG.

For the subscriber stations, transmitter devices are required in which a contact device alternately creates a circuit from the subscriber line branches to which it is connected to earth, whereby a temporary short-circuiting of the relays 65, 66 receiving the current surges (Fig. 4) in a corresponding manner. is effected during the time when these are connected to the line in the office. In its work, the contactor closes the earth branch a number of times according to the numbers of the various digits of the required subscribers and is designed so that. the last closure of each series of closings of a digit takes a little longer than the other closings, and so long that the slow-acting switching relay 65 can drop its anchor for the purposes described below.

A sender is required here with the required number the number of digits is set by lever, and then after elevator a drive lever, the required current impulse output occurs.

In addition, the call station is an ordinary central microphone battery station, which is connected to the office in the usual way by two cheerful a, b . a call counter 63 is assigned to each line. A counter is required here, which advances a dial by one unit for each successful connection; it can be designed in any known manner.

The facilities responsible for receiving the requested line representing current surges and for the subsequent corresponding control of the selector setting are referred to below as registers. The individual devices, those that receive the surges should be called registers, and that is in each one Movement has an iooo, ioo, io and units register.

As mentioned, the circuit of the register is shown in FIG. 4, the structural design in FIGS. 5 to 8 . The working magnets of the various registers are indicated with r and s with the addition of the register number. B. r ioo, s iooo. A sequence switch is also provided, the drive or clutch magnet of which is designated 205 and which, among other things, serves to activate the various registers one after the other.

Fig. 5 shows the iooo register. It consists of a disk K carried by the shaft L. A pawl 31 attached to the armature N of the Mab O * neten ri ooo engages in a toothing on the circumference of the disk. A spring 0 usually pulls the armature back so that it comes to rest against a stop P. The magnet s iöoo, whose armature R, which carries the pawl Q, is usually pulled against a stop T by the spring S, serves to return the disk K. The disk K carries an isolated projection U, the. when the register is in the rest position, contact 189 closes. There is also a spring 87 which rests on the circumference of K with a roll of insulating material. Depending on whether the roller is on a tooth or in a tooth gap, the spring 87 closes a lower or upper contact.

Disk K has ten teeth p, five i teeth m, the pitch of which is twice as large as that of teeth p, and five teeth o, the pitch of which is the same as that of teeth in. The magnet i- iooo is alternately excited by current surges emitted in accordance with the iooo position of the required line and causes the disk K to rotate in the clockwise direction; the number of steps corresponds to the number of impulses. If the register acts as a monitoring device for the dialing process, the magnet s iooo is alternately excited by current surges transmitted by the voter and rotates the disk K gradually in a clockwise direction in the opposite direction. As a result of the different pitch of the toothing m, however, the number of current impulses required to return to the rest position is only half as large as the number of current impulses causing the adjustment.

In the system described in the following, the iooo register does not act directly as a monitoring device, since here a system of only: 2ooo connections assuming Nvurde. However, by means of the spring 87 it has an indirect influence on the selection process in the manner described below. It is reset by a special surge circuit via the magnet s iooo, which is established after the end of the voting process.

The reference numerals of the springs of the registers are chosen to be the same in FIG. 4 and FIGS. 5 to 8.

The ioo register is shown in FIG. 6. It also has a disk Kl- seated on a shaft L '. The magnets r ioo and s ioo are used to adjust and reset the disc. This register has two springs 85 and 86. The normal rest position is the one shown, in which the spring 86 is in contact position. Under certain circumstances, however, this register is required to receive five special bursts of current in order to perform the required translation. In this case, the disc under surveillance is of iooo-Register.s working and not stop when the spring is reached 86, but only after reaching the spring 85. Are included the ioo-current surges the station, thereby closing a spring 158 their lower or upper contact, depending on whether the number of impulses is even or odd.

In FIG. 7 the io register is shown, the disk Ks of which is seated on a shaft L '#. The magnet r io moves the disk step by step in a clockwise direction and the magnet s io brings it back into the rest position in which a contact 153 is closed. Just as many current surges are required here for resetting as for setting the disk.

The disk K-1 of the units register (Fig. 8) sits on a shaft L 'and. is adjusted clockwise by the magnet ri, in the opposite direction by the magnet si. Here, too, there are two with an insulating piece U! ' cooperating rest position springs available. Which of these springs in the contact position brings about the shutdown of the disk during the return movement depends on the record position of the ioo register, as will be described in more detail below. It should only be mentioned here that while the disk is also returned to its main rest position by the number of impulses required for adjustment, that is the one in which the TJ4 influences the igo spring, there are also connections which are required for the establishment of the one register ten add more surges of current before calming down; the shutdown is brought about by the auxiliary "ifeder 159".

For the sake of simplicity of illustration and description, only one slice each is shown in FIGS. 6 and 8 for the 100 and unit registers. In reality, three disks are expediently used for the 100 register (FIG. 6) , all of which are rotated together on shaft L ', and two disks for the single register, which rotate together around shaft L4. The first disk of the ioo register has ten teeth p ", the second ten teeth m # I, which have the double toothing pl, but are distributed over the entire circumference of the disk, so that the register can be returned to the rest position after a selection process can, in which it has stopped in its second rest position, in that the magnet is excited from the breaker 1, gi (Fig. 4) until the disk has turned completely and the 1 insulating piece Ul has brought the spring 86 into contact the third disc has the five teeth ol.

Of the two disks of the units register, the first has ten teeth p4 and the second j has ten teeth m4, which are distributed over the entire circumference and have the same pitch as the toothing pl. As the teeth wil 'of the ioo register the teeth NZ' mounted to the i disc acts in the event of the adjustment in the second or auxiliary rest position in which U4 on the spring 159, by influencing the magnets s i from the breaker 1 9 1 (Fig. 4) from a reset until U4 has reached the contact igo and 1 has closed, to be able to effect a complete rotation. There is also a distribution switch, the magnet of which bears the reference number 305; this is used to start ZD searchers for the purpose of determining the calling line. Call seekers and group dialers, which are shown in Fig. 2, have a common sequence switch with the magnet io5; The line selector has a special sequence switch with the magnet 505. The distribution switch springs 73, 73a, ' b 7 3, and 73e belong to distribution switch 305, the other sequence switch springs in FIG. 4 to the register sequence switch. Sequence switches of the type mentioned here are already described in older patents; the manner of representation explained there also corresponds to the one used here; the positions of the springs corresponding to the various switching steps of the sequence switch are identified by numbers on both sides of each spring *.

The group selector 4oo (FIG. 2) and the line selector 500 (FIG. 3) are selectors of the known multi-brush type. The viewfinder (Fig.:2 left) is built similar to the group selector, apart from the fact that the brushes are not held back by a locking device in the rest position, but that they always sweep over the fixed contacts when the viewfinder shaft is moved and that the viewfinder does not has a certain rest position. In order to establish a connection with a calling line, the brush trolley is set in rotation from the power-driven shaft with which it is magnetically coupled, and the brushes slide over the rows of contacts. The viewfinder has four rows of contacts and four brushes. The structural design of the magnetic coupling can be the same as that of the voters. Description of how it works : It is assumed that the subscriber of the telephone station shown in FIG. 1 wishes to be connected to the telephone station shown in FIG. The calling subscriber sets his transmitter to 1149, picks up his receiver and pulls the transmitter's power lever. After lifting the receiver, a circuit is closed via the line relay 53 , which responds and closes a circuit via the lower winding of the first register relay 54. The relay 54 closes a holding circuit via its upper winding, which is via the lower winding of the relay 5: 2, the line 58 and. a resistor 6.o (Fig. 4) runs. As a result of this resistance circuit, 52- does not yet respond. 54 connects the line branches a, b to the lines 61, 62 assigned to it and leading to the register. Furthermore, 54 closes a circuit through the counter 63 and the isolating relay 51; this responds and prevents the calling subscriber from influencing the line relay; further verminder - t is the tension in the lines leading to the line test wire voters the calling line so as to appear occupied therein. The meter is not receiving sufficient power to influence it.

If the register (FIG. 4) had been occupied, the current flow exciting the relay 54 would not have come about, since the upper contact of the sequence switch spring 57 would then have been open. In this case, however, the lower contact of the spring 57 would have been closed and the relay ## of the second register would have been energized in a Stro2kreis via the upper normally open contact of the line relay 53 and the line 5611 instead of 54. When responding, 55 would have produced the same effects as 54, except that its holding circuit would have been routed via the upper winding of the isolating relay 52 and that the second register would have been switched to the calling line instead of the first.

After releasing the transmitter drive lever at the subscriber station, the individual setting levers return to their rest position. each lever carries a segment with tooth-like projections which Upon sweeps past on a spring grams of soil to the B leg of the conduit. If all teeth of a segment have passed the contact spring and all current impulses are sent out except for one, which determines the thousand, a grounding of a somewhat longer duration is effected by means of a wheel h as soon as a projection of this wheel reaches a spring i. When the second segment d sweeps past the spring g , ## a number of current impulses corresponding to the number of the ioo-place is sent via the b-branch, of which the last one caused by the wheel h is of a longer duration , and so it goes on until the transmitter has transmitted all power surges to the office and has returned to its rest position.

If the subscriber line is connected in the manner described with the first register i factory carrying conductors 61, 62, a circuit for the parallel-connected relays 65, 66 and the relay 68 is closed via the subscriber station. The excitation of these relays occurs immediately after the register has been assigned. The grounds of conductor b through segment c of the transmitter short- circuit relays 65,66. While the relay 66 drops its armature with every current short-circuit, the short-circuits 1 are not of sufficient duration to cause the armature at the delay relay 65 to drop. The relay 68 remains energized as long as the receiver is picked up and, when triggered, closes a circuit for the sequence switch 2o5, which causes the return to the rest position in the manner described below. The first excitation of the relay 65 »closes a circuit for the register sequence switch magnet 2o5 via spring 69 below. The switch goes to the position -. When changing from position i. to position: 2, a current surge is sent to magnet 305 of the distribution switch via the spring 70 below, causing the distribution switch to advance by one step and at the same time activating a free caller to find a calling line.

The distribution switch indicated by the magnet 3o5 and its contact springs is dependent on the registers that are accessible to a certain line group. This dependency on several registers is expressed by the multiple connection of the conductors which start from the lower contact of the spring 7o. The effect of this switch consists in the preselection of a free call seeker - the group controlled by him; Immediately after a register has been occupied by a subscriber line, he leaves the preselected viewfinder on for the purpose of setting the line. He then selects another free searcher before the call status occurs in any ZD of another line in the group. The construction of the distribution switch and its mode of operation are the same as that of the subsequent switches, only it has no specific rest position. Assuming that he is in position i when the call described is initiated, the current impulse reaching his magnet 305 via the lower contact of the spring 70 moves him to the 2nd position. Spring 73 above closes a circuit via spring 74 below of search success switch io5 (Fig.:2), which goes from position i to position 3. As soon as the viewfinder switch and. so that the viewfinder itself is started, spring 74 opens the lower contact and closes a ground connection via the upper contact. Any finder in use does the same; So if the distribution switch comes into the position - "so when the second viewfinder, that is the one connected to the spring 73" (Fig. 4), is occupied, a circuit for the magnet of the distribution switch will come about, so that the Switch continues immediately after position 3 , and so on, until he has found a free searcher, on whose contact he remains until the receipt of another call requires a new stepping forward. While the distribution counter started the call finder, the registration of the call continued quietly. If the register sequence switch moves to position 2, the iooo register magnet is connected to the normally open contact of the fast-acting relay 66- via spring 71. Since the relay picks up its armature once with each current surge, the magnet r ioco is also influenced in a corresponding manner and moves the register disc by one step with each surge. In the relatively long grounding the end of the surge grater for the thousands, the relay can 65 falls its anchor and closes the normally closed contact and spring 69 above a circuit for the magnet 205, so that the next switch in - is the position 3, in which the magnetic r ioo of the ioo register is applied to the normally open contact of 66 via spring 71a 'below; If the relay 65 is energized again, a new circuit for .205 is closed via 69 below, so that the switch goes to position 4. The connection for the magnet r ioo remains, however , and this now receives the current surges for the hundreds just as it did before r ioo for the thousands. At the end of the second series of impulses, 65 is de-energized again, causes switch 2o5 to move to position 5, and so the game continues. The magnet r io receives the tens current impulses via 71 # in position 6 , the one magnet ri in the sequential switch position 8 receives the ones current surges via 71c. The de-excitation and subsequent excitation of the relay 65 during the last longer earthing in the transmitter brings the switch 2o5 from position 8 to position io.

When passing through the position 9 , the resistor 6o is short-circuited at the bottom of the spring 72 , and a sufficient current now flows via the line 58 to energize the second isolating relay 52. This completely separates the subscriber station through its anchors during the voting processes that now follow, which are to be regulated by the registry.

The test contacts 104 are grounded on the free lines via the counters 63; This test contact is also earthed in the same way for lines that are involved in an existing connection. If, however, the line calls, the earth connection is removed by one of the register relays 54 or 55 , and the line can then be seized by a seeker. In view of the fact that the register relay separating the earth remains energized until the dialing process is completed, it appears necessary to apply a searcher earth to contact io4 immediately after the line is occupied, so that no further seekers can adjust to it. This is done - via a spring 76 at the top of the search success switch, which grounds the line leading to the test brush io4.ß via a resistor that corresponds exactly to the resistance of the counter 63.

The search success switch io5 closed a circuit for the test relay 75 of the viewfinder via the spring 76 below and, if the brush io4.11 is on the contact io4 of a non-calling line, to earth when moving from position i to position -3. When responding via the spring 77, 75 produces a circuit for the force magnet io6 of the seeker for battery, and the magnet sets the brush carriage iooll in motion. As long as the test brush hits contacts 104 on non-calling lines, 75 remains energized. During the transition of brush io411 from one contact to the next, the viewfinder breaker iog maintains a circuit for 75 independent of the circuit across io4 # a, so that 75 remains energized; the auxiliary circuit is interrupted every time the brushes are in the correct contact position. If the brush io40 reaches the contact 104 of the calling line, the test relay no longer finds earth and is de-excited. As a result, the circuit for the magnet io6 is interrupted and the circuit for a brake magnet iio is established via the break contact of 75 and the spring 78 . the viewfinder stops. The brushes ioill to io4. # Are now set to the contacts ioi to 104 of the calling line. The relay 75 also closed a circuit for the sequence switch magnet 105 via the spring 79 above. The switch goes from position 3 to position 5. From position 4, the spring 81 on the upper contact closes the relay 8o to the brush ioiu ,. If the register sequence switch is in one of the positions i to 8, in which current surges are received by the register, the relay 8o is in a circuit via 81 above, -ioia, ioi, upper break contact of relay 52, subscriber station, lower break contact of 52, make contact of 54, 62, the parallel relays 65, 66 and 64 below are energized. The search success switch 105 remains in position 5 as long as the switch 205 is in one of the positions i to 8 and the relay 8o is energized.

At the moment in which the search success switch connected earth to the test contact 104 via 76 above in order to make the occupied line occupied for other searchers, the spring 96 of the same switch established an equivalent circuit for the isolating relay 51 via IO3a and 103 , through the 51 as long as kept energized - is heard as the line to which dasTre'nnrelais must remain blocked against a call from the other side, that is to Zusaminenfall the connection and reset the devices in the rest position. As a result of the establishment of this equivalent circuit, 5 1 is no longer dependent on the circuit established by the register relay 54 or 55 , and the line relay 53 is kept disconnected from the line.

As soon as the sequence switch 2o5 goes from position 8 to position io after receiving all current surges, the electrical circuit for relay 8o (Fi.g #: 2) is opened at spring 64 below (FIG. 4); the relay is de-energized and closes a circuit at its series contact for the sequential switch magnet io5 via spring 92 above, so that the switch moves from position 5 to position 7. In positions 6 and 7 of the sequence switch, the selector or main circuit is closed as follows: Earth, spring 83 below, ioia, ioi, upper normally open contact of 54, wire 61, spring 64 above, windings of relays 65 and 66, wire 6.2, lower normally open contact of 54, 102, io: 2 "" spring 84 above, relay 8o, battery. The relays 66 and 8o are energized before the search success switch reaches position 7 , in which a circuit for the force magnet of the brush selector 409 on the group selector 400 via the spring 88 below and the armature of the relay 8o is closed. So the brush selector starts to run.

As mentioned, the subscriber transmitter gives the current impulses that correspond to the requested subscriber number according to the usual decimal system; the digit of each digit is represented by an equal number of rushes and a supplemental rush, i.e. for the number o one burst of currents is sent out, for the number i two bursts of currents and so on. For subscriber number 1149, the following series of current impulses are to be sent: two, two, five, ten. These surges are prepared by setting the discs of the register by a corresponding number of steps clockwise.

The line selector of the system should each contain 2oo terminals which are arranged in ten rows of 2-o contacts each. Likewise, the group selectors should each have 2oo connections, also in ten rows, each of which has 2o connecting lines to a group of line selectors. The first contact level of the group selector contains connections to line selectors to which the subscribers o to igg are connected, the second row contains connecting lines to the line selectors containing the connections 2oo to 399 , and so on; in the last row are the connections of the connecting lines to the line selectors, which can reach the connections i8oo up to 1999. The connection 1149 is to be established via a free connection line in the sixth row.

Thus, the connections in an even thousand can be reached via the first five contact rows of the group selector, while line selectors that have access to connections in an odd thousand are reached via rows 6 to 10 of the same group selector.

From this it follows that the ioo register has to be brought into the position in which it causes the electoral process to stop in the group voter during # of its control activity by a number of steps that is either equal to or equal to half of the current impulses transmitted by the subscriber station this half increased by five more steps. If the number of ioo surges is odd, i. H. If it represents an even hundred, the number of steps that the ioo register has to execute in the reverse direction when moving the back of the door clockwise will, of course, correspond to half of the next higher even number, possibly increased by the five additional steps. As is easy to see, the five additional steps are only necessary if the iooo digit of the required subscriber number is odd. Since an odd iooo digit was assumed here, the ioo register may only complete the dialing process when it and the brush selector have carried out six steps. The regulation of this activity of the ioo register causes the iooo register, whose task in the example described here is to determine whether contact 86 or contact 85 (FIG. 6) of the ioo register should be effective for the shutdown of the ioo register and the termination of the voting process in the group voter. This task is solved by the teeth o and the spring 87 of the iooo register. If the thousand digit (or for larger systems: 2, 4 etc.), the selection takes place in the group selector in the first five (lower) contact rows and the five additional steps are not required. Therefore, the contact spring 87 of the 10000 register is arranged in relation to the teeth o that when the register has made a step as a result of a step from the transmitter, the roller on the spring 87 remains on the long tooth on which it usually stands. The spring 87 holds 1, consequently, the ground connection of the leads to the contact 86 of the register ioo wire upright (Fig. 4). When the ioo register reaches its rest position, it closes this main rest contact and thereby a circuit is established which brings about a switching process by the register sequence switch, by means of which the ioo register is brought out of relation to the main circuit, but the io register is brought into relation to it .

Since the iooo digit is i here, the iooo register has taken two steps and the role of the spring87 lies in a gap in the toothingo. In doing so, 87 Er-de applies to i contact 85 of the ioo register. Since there is now no earth at contact 86 , the ioo register will not be switched over and stopped before it has reached the auxiliary rest position in which contact 85 closes. In the case of the example, the ioo register must carry out six steps in the direction opposite to the clockwise movement. If the iooo number had been 2, 4, etc., an odd number of iooo current impulses would have been emitted, the iooo register would have carried out an odd number of steps and the roll of the spring 87 would have stopped on a tooth; the effect would be the same as with the thousand digit o. As mentioned, the task of the iooo register in the example is to determine whether, after resetting the ioo register to the main or auxiliary rest position, the voting process in the group voter is brought to an end shall be. In a system containing between 2,000 and 2o,000 connections, as can easily be seen, the 10,000 register would have to control the election of a further set of group voters and a fifth register would have to be used to determine, in -i which-he: 2 ooo group of the 2o ooo connections would have the choice to take place in this further group voter. The 'translation between the iooo Regi # .ster and 4em. The fifth register would have to be based on the same principle as between the registers dealt with here, and without an inventive step the system could not only be expanded up to: 2o ooo, but also up to, 2oo ooo and more connections; it would only be necessary 1 to install additional registers and additional group selectors.

In the line selector, too, there is a current impulse translation with the interaction of the, ioo and units register stat + Jf. At the ioo register it is caused by the contact device 158 and the toothing o ", which determines whether an excitation of the self-holding relay 156 occurs, which earth connection applies to the contact device 159 and igo of the unit register. If the ioo digit is odd, a Stronikreisz is prepared, which in the eighth and ninth position of the register sequence switch causes 156 to be excited and blocked, so that it connects earth to contact 159 via its right armature an even ioo digit, on the other hand, no circuit is established for 156 in -the -en-en positions and the earth remains connected to the igo contact.This determines whether the ones register will last, i.e. its 1 # ontrolling by so many steps is adjusted, was similar to the set by the supplied, current pulses of the subscriber station, or to a greater by ten step number of steps as a consequence of the viewfinder switch 105 in the position 7, Wurd e that, relay 8o: energized and the brush selector magnet 409 put its shaft in circulation. For each step of the brush selector, an earth tap is connected to the battery side of the main circuit through the TS breaker 407. During this application of earth the relay So remains energized, but the step relay 66 in the register is short-circuited each time, drops its anchor and immediately afterwards pulls it on again for each step of the brush selector. With every excitation of 66 , a circuit is closed for the step magnet s ioo, the register of which is reset in step with the advance of the brush selector. To reach the sixth contact level, the brush selector of the group selector and thus the ioa register must carry out six steps. before the regisiter brings the voting process to an end by opening the main circuit. This process actually occurs; for since the 10000 register has carried out two steps, the spring 8, 7 is influenced in such a way that it has separated the earth from 86 and applied it to contact 85 .

Is the relay 66-. short-circuited for the sixth time = d # so at the same time the thirst selector is in the position suitable for triggering the sixth set of brushes, t,! the pin Uldes roo register meets the auxiliary break contact 85, and there is a circuit for the next switch: 205 via 89: down, 85 and spring 87 closed, so that the switch goes into position i: a.

If the switch: 205 leaves its tenth position, the main circuit is interrupted at 64 above and the relay 80 is de-energized as soon as the breaker of the brush selector disconnects. to earth opens and the brush selector 4a has come into the exact position in which it can trigger the sixth set of brushes. The circuit of the brush selector magnet 409 is interrupted by the thief de-energizing 8-a; the brush selector remains in place. Furthermore, So closes a circuit for the, sequence switch magnet via a normally closed contact. io5 via spring 92, above, so that the switch goes from position 7 to position 8. In dbr position 8 of the sequence switch, a drive circuit for the brush trolley of the group selector is closed, which runs via the break contact of the relay go and the spring 9 # i to the force magnet 4o6: the brush trolley starts moving and the triggered brush set begins to search for a free connection line in the selected contact level. The brush 40S5, which is grounded via 95 below, the left high-resistance winding of the relay 93 and the relay go, brushes over the Ptüfkontakte 403; She comes into contact with a contact that has a. Resistance gz , connected to the battery (Fig. 3) and the spring 92a is connected and to which there is no earth shunt via another group selector, the relay 93 will respond and, through its normally open contact, connect its right, low-resistance holding winding to the left, high-resistance winding in parallel so that the occupied line selector appears occupied for other group selector due to * the voltage drop on the test wire. After the brushes of the group selector have been precisely adjusted to the contacts of a free connection line. isind, becomes a pre-existing short circuit. to the relay.go at the breaker 410, and the responding relay interrupts the circuit at its break contact. for the magnet 4o6 and at the same time closes a circuit for the brake magnet 408 via its normally open contact and the spring 94. It also closes a circuit for the sequence switch io5 via 92 below; the switch goes to position 9, in which the contacts ioi, io2 of the call seeker are switched through to the springs 8,1 and 84 below to the group selector 5oo #. Furthermore, the contact io4, to which the call counter is connected, is connected to the group selector via spring 95 at the top, and the. Contact occupying earth is transferred from the upper contact., The spring 76 to the upper: contact of the spring 95 through the test relay and the circuit of the isolating relay 5 1 is closed via 96. above.

Now the main circuit for the tens dial the required number is sen closed-i; the circuit is earthed via spring 97 below (Fig. 3) and battery via the, line relay 99 (Fig. 3) and spring 99 below.

While now the Registerfolgeschat- 1, iz ter in position, the viewfinder sequence switch in position 9 and the Leitungswählerfälgeschat- 'ter SO5 is i in position, the main circuit contains the step relay 66 and the line relay 98. Durch'Erregung 98 is spring i5o below a circuit is closed, which brings the sequence switch of the line selector to the second position. In this, the main circuit remains unchanged and the line relay is energized, but a circuit is also established for the brush selector magnet, which is via the normally open contact of relay 98 and the spring. 1 5 1 runs below.

With every step that the activated brush selector carries out, an earth branch is again connected to the battery side of the main circuit by a breaker 507 via the spring 1 52 above. The relay 98 remains however to be energized until the main circuit i again to the spring 64 (Fig. 4) is interrupted, while the relay 66 at 1 deenergized each step once and is energized again to the disk of the io register reset. After the required number of steps, this closes a circuit via the springs 153, 154 at the top to the sequential switch 2o5, so that it continues up to position 14. When leaving position 12, the main circuit is opened at spring 64 at the top, and relay 98 is de-energized as soon as the brush selector has reached the position suitable for triggering the appropriate brush set. Then a circuit is closed via the normally closed contact of 98 and the spring 155 at the top, by means of which the magnet 5o5 of the sequence switch is caused to move its shaft into position 5 . As mentioned, the connections are distributed to the 200 contacts of the line selector in such a way that each time the first ten connections of each of the ten contact rows contain the connections of the odd hundred. Since the ioo number is odd here, the connections of the required line must be in the second half of the selected contact row of the line selector. In order to bring the brushes to the connection of the requested line, it will therefore be necessary to bring them up to the 7-o. Contact instead of turning to OK. The register sequence switch closes the circuit for the translation relay 156 (Fig. 4) at contact 158 in the ioo register when it passes through the positions 8 and 9 on spring IS7 at the top. Since here the ioo register has received an even number of current impulses corresponding to an odd hundred, the relay 156 has been energized and has switched itself into a local holding circuit via spring 70 above. As a result of the excitation of 156, the auxiliary break contact 159 of the ones register ri is assigned control over the termination of the singles dialing; this contact brings the register to a standstill ten steps after the main rest, so that the one register must carry out ten steps more than it received power surges from the subscriber in order to close this contact.

With position 14 of switch 2o5 and position 5 # of switch 505 , single selection takes place in the line selector. The main circuit is closed at the spring racks and 97 below, and the relays 98 and 66 are energized. As a result, a circuit for the brush carriage magnet 5o6 from relay 98 via spring 16o at the top is closed; the brushes ioia, or io3, u- are made to circulate. When passing the brush selector shaft, the selected brush set is triggered, and the interrupter 510 at the top of the selector closes an earth connection on the battery side of the main circuit for the upper contacts of springs 161 and 152- for each accessible contact, whereby the step relay 66 is again influenced, that it alternately closes and opens the local circuit via the step magnet si of the Eincrregister. Since the register has been adjusted by ten current surges and has to carry out ten additional steps before contact 159 is closed, it only comes to a standstill after 20 current surges have flowed through relay 664. Then a circuit for the magnet 2o5 of the register sequence switch is closed via 154 at the bottom and the right working contact of the relay 156. The register sequence switch leaves its 14 position.

In the 15th register switch position: The reset magnet s iooo is placed on the interrupter igi via the spring 192 above. The magnet is alternately excited and de-excited and brings its register step-by-step in a clockwise movement in the opposite direction until it closes contact 189; then a circuit for the sequence switch is closed via spring 89 at the top, which continues from its 15th position and opens contact 192 at the top, so that the iooo pegister cannot be moved any further. In position 16, a similar circuit for the magnet s ioo is closed via 192 below and the ioo disk is reset counter-clockwise until a circuit for the sequence switch via 89 above, 86 on i,) is in its - # - main rest position. o regi, ster and 87 am. iooo register is closed. In a similar way, the io register, which is outside the rest position, is reset in the 17th position by a circuit via 193 at the top and, when returning to this position, causes the sequence switch to move to the Position 18. In this, the unit register is reset via 193 below and closes in the rest position a .Stromkreis via 154 below, its break contact igo and the break contact 156, whose holding circuit was opened at 70 above when the switch left the 15th position. As a result, the next switch goes to the starting position, g and the entire register is in the rest position again.

Since the further switching processes, such as checking the desired subscriber line, Ringing the desired subscriber, releasing the connection, etc., not in the Fall within the scope of the invention and can go on in a known manner, need they do not need to be described in more detail.

Claims (2)

PATENTT -AN s P. Rüc H r: i. Circuit arrangement for telephone systems in which calling lines are connected by means of automatic switching devices to connecting circuits ending in the first group selector - and in which a register located in the office and occupied by a calling line regulates the setting of the first group selector, characterized in that the setting regulating, from Register to the first group selector running circuit contains a call searcher, which is started over the register. 2. Circuit arrangement according to claim i, characterized in that the search for the calling line for the purpose of connection with a free connecting circuit already takes place in the time in which the dialing current surges are sent out over the line. 3. Circuit arrangement according to claim 2, characterized in that the connection of a register to a calling line causes the line to be blocked against calls from other parties. 4. Circuit arrangement according to claim 3, characterized in that a calling line can be called up to the occupancy of a register from the other side, but that after. When the switching devices containing one or more relays come into effect, an occupied voltage is applied to the test contact of the line at all the points where it appears as a callable line, despite the fact that it has not been connected to a connecting circuit. 5. A circuit arrangement according to claim 4, characterized in that the activity of the calling line to a register connecting devices acts on the line so that it is selectable as an ' calling line in the searchers, but not selectable on the contacts over which she can be called. 6. Circuit arrangement according to claim i, characterized in that a distribution switch which causes a call seeker to be started for the purpose of finding the calling line is controlled by the register occupied by this line. 7. Circuit arrangement according spoke 6, characterized in that the distribution switch is influenced by the occupancy of one of the registers by a calling line so that it starts the next free call seeker of the line, group for the purpose of looking for the calling line. 8. A circuit arrangement according to claim 7, characterized in that the distribution switch after starting a call seeker of the group for the purpose of finding a calling line automatically switches to another free seeker so that it immediately activates the preselected call seeker after a register is occupied by a calling line can put. G. Circuit arrangement according to Claim i, characterized in that the circuit which receives the current surges is influenced by the register after receiving the current surges in such a way that the subscriber line does not affect the control of the selector setting by the register. ok Circuit arrangement according to Claim 9, characterized in that the device acting on the line contains a relay which is dependent on the associated register mechanism in such a way that, after receiving the current impulses via the line, it is excited and remains excited, thereby connecting the circuit of the calling line is interrupted by the register while the selector setting is being regulated. i i. Circuit arrangement according to claim 10, characterized in that the circuit for the relay is established immediately when the register is occupied by a calling line, but the relay is only activated by a current amplification which the register after completing its registration activity brings about. A circuit arrangement according to claim ii, characterized in that after the completion of the selector setting operation of the register, the relay circuit is interrupted and the circuit of the calling line is restored. 13. Circuit arrangement according to spoke i, characterized in that an isolating relay assigned to the calling line is brought into effect alternately via different circuits, of which at least.einer keeps it energized as long as the line cooperates with automatic facilities of the office. 14. Circuit arrangement according to claim 13, characterized in that the first excitation of the isolating relay of a calling line is dependent on devices through which the line is connected to the register, and - that the excitation is maintained by this until the line is switched over to one of the searchers, whereupon it continues to exist until the connection breaks down, depending on a circuit belonging to the searcher. 15- Circuit arrangement according to claim i, in which the automatic switching work for establishing a required connection is initiated by a line relay of the calling line and an isolating relay brought into effect by this first switching process disconnects the line relay from the line, characterized in that . the Linienreläis after production of the call state of a line, the direct connection of the line to a to the receiver acquisition and accumulation of current surges on the - causes line geeig # -netes register work, while the cut-off relay circuit immediately after the arrival # comes into effect and the line relay of d7 disconnects the line connected in this way.