DE319784C - Circuit arrangement for telephone systems - Google Patents

Description

Circuit arrangement for telephone systems. The invention relates to a circuit arrangement for telephone systems with electromechanically adjusted circuit elements, in which for one or each group of subscriber lines a number of connection elements (e.g. connectors or viewfinders) inserted locally in front of the number surge receivers are provided, which are only provided for the busiest time corresponding connection needs. Systems of this general type have become known, for example, in German patents i26o8i and 1 74880 .

In the system according to patent ia6o8i, a calling subscriber is first via a number current surge path with a line selector (in the patent specification »Sucher« called) connected. After the line selector then on the desired to be called Line is set, the connector associated with the line selector becomes set to the calling line and then the number current pulse path from the established voice connection is switched off and other subscribers who -at the same time or immediately after calling the first participant, made available. A lack of this The system consists in that at a time only one subscriber has a numbered rush route for the purpose of setting up a numbered surge receiver and a second calling subscriber has to wait so long for his connection to be established, until the former fully set a line selector and on it a connector has established his voice connection. The present invention solves the problem Several calling subscribers can use different number burst paths at the same time to make, whereby they independently establish different connections. place can. This is achieved in that the calls of the participants via a group by automatically operating switching devices or temporarily used over several Switching paths, the contacts of which are connected to the subscriber lines, according to voter control organs through which other, simpler and cheaper means of connection and dialers (connectors and numbered surge receivers) at the same time as those calling as well as the called lines or line groups connected or set can be. The setting of the connection organs for the establishment of the speech connection with the calling line is done by control devices, which of the calling Participants or from the operator are independent, while the simultaneous Establish the same connection with the desired line through those with the ones mentioned Connection organs connected connection devices or by number surge receiver under the influence of the - manipulations of a participant or an operator he follows. The system is expediently set up in such a way that the switching processes at Establish a connection in the manner of a four-cord system handle that a subscriber when calling first via a temporary switched on Pair of switches and then continuously switched on via a second in the speech connection Pair of voters is connected. Here, precautions must be taken that when switching off of the first pair of switches no disturbance or interruption of the number current impulse entry. Also, it is important that the line picker is first temporarily connected to a calling line by the first pair of switches, afterwards through its connector not to another line calling at the same time is connected. To achieve this, for each group of participants everyone will temporarily used number current pulse path from a setting switchgear and a Auxiliary switch (connector finder) formed, which are set up such that also if several connections are made at the same time, confusion due to wrong Work of the connector associated with the number current 'surge receivers avoided will. Special circuits are provided to prevent such incorrect connections with special contacts provided on the setting switchgear and auxiliary switches applied. An auxiliary switch is assigned to each setting unit, which together with the setting mechanism for each connection a setting current path for a connector produces that of the adjustment current paths of further connectors operating at the same time is independent. To avoid cross connections or incorrect settings of the particular connector used, it is also important that the adjustment circuit or test circuit for influencing the setting of the connector Organ (relay) is routed via contacts in all switching elements or switching mechanisms, who contribute to the adjustment of the connector. So there are for each group of -Subscribers to forward several calls to the liaison bodies at the same time, Line-identifying switching elements arranged, which with special facilities cooperate in such a way that the connecting elements -the current surge receiver assigned to them only connect to those lines by whose call you can use the named -Switching elements have been excited.

These special means make it possible for the participants incoming calls at the same time or without pausing in any order or call order, as z. B. in the known Lorimer system (patent 1748 $ o) is provided to which the number current surge receiver can be passed on, and yet such control of the connectors is achieved that they are only with the line from which it was originally established have been suggested.

Compared to the Lorimer system, the invention also has the above-described, o # Understanding the difference that each participant has to establish a voice connection not only on the setting of a viewfinder that establishes the voice connection or connector needs to wait, but rather because of the particularly fast working Switching devices or setting switchgear immediately trigger a selector current surge and, if necessary, also receives a voice connection. This offers the opportunity for Connectors to use slow-working, relatively inexpensive types of switches, z. B. those that have a single row of contacts and those for a whole group Contact fields made up of punched strips shared by connectors or voters be used. The moving contacts may then be relatively long Cover a distance before reaching the relevant line, so that large groups can be formed by several hundred participants without disruptive delays to have to fear in the connection establishment.

For the implementation of the general basis of the invention The nature of the switching and connecting organs is in itself immaterial. Important it is, however, that these organs are designed in such a way that several participants take part at the same time can be connected and that the connecting organs regardless of any call order Only ever connect the numbered surge receiver to that subscriber line, from which they received a call.

In order to achieve the described quick connection of the subscribers to the I @ number current impulse receivers, setting switches with several contact arms, each of which covers only a smaller group of line contacts, can be used for the production of the temporary connection paths, while, as mentioned, the connectors only one own set of contact arms for all lines.

for the quick and error-free processing of the connection processes it is important that an auxiliary switch is assigned to each setting switch associated switchgear after each use of the same with a Nun mernstrom shock receiver 'respectively. Connects voter who is neither occupied by a call connection nor through another auxiliary switch is assigned.

- The fast working setting switchgear assigned Auxiliary switches always bring or hold their setting switchgear with a free one Connector in connection. The auxiliary switch or connection finder runs over the Connector leads away until it has found a free line. These it then puts it in the busy state and holds it for the next connection the assigned, fast-working setting switchgear. From the connector seekers are fewer than connectors, and the circuit is arranged so that never two such connector locators stop on the same connector lead. The group selectors connected to the connectors are switched so that in them certain operations at the same instant as other operations in the next group selector or take place in the line voter. It is z. B. at the moment when the Line selector from the subgroup selection (e.g. lifting movement of a Strowger selector) is reversed, in the group selector a starting circuit for the connection seeker who is advertised with him closed to -the separation of the fast-working seeker by the connector finder to effect. The moment the fast-working seeker disconnects, ' a new connection that is now being prepared by a slow working connector is switched through at the connector. A voter control relay circuit is used in this system used, in which the circuits of the reversing and tripping relays only when used of the relevant relay set are closed. This preparatory closure turns off when the connector claimed for the connection is moved its rest position executed.

The setting of each connector on the particular calling line can be made dependent on a relay, its winding at both winding ends is connected to the power source via a resistor, the circuit is arranged in such a way that the resistors cause a stopping of the connector Do not allow the relay to operate until the connector is on a calling line is set, with which it was previously set via a setting switch and an auxiliary switch was brought into relationship. The relay governing the setting of the connector can be provided with differential windings; which are switched so that their magnetizing effects cancel each other out when the connector is on the right one calling line arrives, meets.

The invention is illustrated in the drawing, in which Fig. i -is a basic scheme of the new system. Fig. 2 shows the order of the connections the participants in a group to the established contacts of the fast-working Line finder. Fig. 3 shows the structural design of the fast-working viewfinder represent, partly constructively and partly schematically. Fig. ¢. - Tends the Switching the subscriber lines, the call folder of a subscriber group and a part of the setting circuits of the fast working viewfinder. Figures 5 and 6 illustrate the remainder of the circuit of the fast-acting seekers. Fig. 7 shows the circuit of the connector finder. Fig. 8 shows the circuit of a connector: Fig. 9 shows the circuit of a group selector, Fig. 10 shows the circuit of a line selector Fig. i i shows the circuit for setting the connector to a calling Line, and Figs. F2, and i 2 a show a circuit arrangement for prevention the setting of several connectors on one and the same line. A complete The circuit diagram of the invention is obtained by placing FIGS. 4, 5 and 6 side by side and Fig. » 3 over Fig. Q., Fig. 7 over Fig. S and then Fig.8 over Fig.3. Fig. 9 over FIG. 7 and finally FIG. 10 next to FIG. 9.

The course of a connection can be explained broadly with the aid of FIG. The subscribers T, T, etc. are all connected to the fixed contacts of three different types of switching mechanisms, namely to the fast-working line finder F, the slow-working connector LF and to the line selector LW. If there is more than one group of subscribers in the office, in addition to the line selectors LW , group selectors GW are also provided in the manner indicated: As soon as a subscriber calls the office by lifting his receiver, the fast-working seeker F immediately or after performing a few switching steps Connection between the subscriber (z. B. Ti) and a group selector, 'with the help of a linker seeker VS, which always has a connection between the fast-working seeker F assigned to it and the group selector GW or the slow-working switching mechanism or `Connector LF keeps prepared.

'The calling subscriber now sets the group selector GW to desired, group and then receives "a connection with a free line selector LW of this group. In the meantime, the slow-working connector LF places itself on the calling line T1 a. Has the connector LF adjusted to the calling line and is the group selector is set to the desired group been then the connection of the subscriber via the fast-working searcher F and the connection finder VS is canceled, and only the connection with the remains Group selectors exist via the slow-working connector LF. Of the participants now sends the remaining setting currents via the slow-working connector LF and the group selector GW after the line selector LW and set it to the desired one Line, e.g. B. T2, a.

Are relatively large groups of participants, e.g. B. those with j e q.oo participants, educated; so it can happen that the slow working connector takes quite a long time to tune into the calling line T. In order to save this time, the disconnecting circuit of the fast working viewfinder F can be set up in such a way that they can only be set up after a second Group voter or after setting the line voter comes into effect.

By doing. in the circuit example described below, the Disconnection circuit to take effect after the line selector is half set, d. H. after being set to the subgroup (group of ten) of the desired participant is.

In Fig. A, the ten rows of contacts are one that operates rapidly Line finder for iöo lines shown. The ioo lines of the group will be connected in the order indicated by the number. So z. B. the subscriber lines, which are numbered from oo to o9, to the contacts of the first (bottom) row connected. The lines, which the numbers io to i9 are connected to the contacts of the second row, etc. From Fig. a shows that all lines whose numbers have the ones digit positions r to q. are connected to the left half of the contact field, while all Lines whose unit digits are expressed by the numbers 5 to g the right half of the contact field are connected.

A contact brush is provided for each row of contacts w ", w1... Provided w9. The cable detector is arranged so that, depending on the calling subscriber is connected to the left or right half of the contact pad, the contact brush w 'to w" from its Move the middle layer to the left or right. The greatest distance that the brushes have to cover will therefore be the distance covered by five adjacent contacts.

The brushes w "to w are usually insulated so that no connection is made by the sole action of these brushes. However, there is another brush W (Fig. 3) which is connected to the connection line and softens the execution of a connection with a calling party is connected with the brushes w "to wfl. This brush W moves to the upper or lower half of the contact field, depending on whether the calling line is in the upper or lower half of the contact field. The brush W is stopped as soon as it reaches the brush w "to w" which sweeps that row of contacts which contains the contact of the calling line. It can be seen that the brush W also needs to carry out a maximum of five switching steps. The brush set w "to w" and the brush W move simultaneously. It therefore takes at most the time required to move a brush w or W by five steps to search for any line among the 100 lines. On average, the time required to carry out 2.5 switching steps is therefore required.

In FIG. 3, a construction is indicated which can be used for moving the contact brushes w " to w" . In this, S is a brush shaft to which the brushes w " to w" are attached and which is mounted in a bearing b. A disk d is attached to the lower end of the shaft. This disk d is replaced by one of two disks dl or d. driven; which are attached to a drive shaft S1. The drive shaft can be common to a larger number of seekers. Through e1 and e. coils are indicated, which, when they are flowed through by current, their disks dl or d. magnetize and then attract the edge of the flexible disk d. The shaft S, with the disks d, and d. rotates in the direction indicated by the arrow a, so that when the disk dl is magnetized, the contact brushes w "to" are moved to the left half of the contact field; The contact brushes w "to w" each consist of a pair of brushes, the upper one of which is moved over the contacts belonging to the subscribers, while the lower one slides onto a contact rail p ". Each contact bar p ″ to p9 is connected to the fixed contact of a secondary switch SW. The secondary switch is constructed similarly to the main switch PS, but it has only one row of fixed contacts and one brush TI instead of ten. The brush W is driven by means of its drive magnets e; or e. ' moved in the direction of the lower or the upper five contacts, which are connected to the lower or upper five contact rails p 1 to p4 and p 1 to p9, respectively.

A disk dg is connected to the upper end of the brush shaft S, which is provided with an inclined slot l. A tongue protrudes into this slot t a, which sits on a switch ds. As soon as the wave S is in the direction of the Pillar a, is rotated, the tongue slides on the upper edge of the disc d and causes switch ds to close its upper contact c. Will -but the Wave S in the direction of pillar a. moves, then the tongue t slides down and closes the contact c. of switch ds. This switch is used when returning of the line finder in its rest position, as described in more detail later will. The sub switch SW has a switch similar to switch ds., The former is not shown in FIG. 3, however.

The brush shaft S of the viewfinder also has a thumb d4, the one Wave switch OS controls, the purposes of which emerge from the description below will.

To simplify the graphic representation and the description is for each contact row of the finder in Fig. z and 3 only one contact row and one brush w each has been illustrated. In reality, however, for each series of contacts of the main switch four brushes w are provided, and instead of one contact per subscriber line «- four such contacts are used. The sub switch SW also has in reality four brushes W and, accordingly, for each of the fixed ones shown in FIG Contacts their four. This is clear from the circuit of the line finder (Fig. 5) emerged.

In FIG. 4, So "S04, So" etc. represent the subscriber stations Group of ioo participants. The stations S.111 S04 and S "6, Soff are the first, fifth, sixth and tenth station of the first group of ten in the group of hundred, and this group of ten is connected to the contact sets which are shown in Fig. z are numbered from oo to o9 and each of the in the line finder provided by the group of hundred. To simplify the presentation, are .only the connections from two stations 04, o5 to the contact sets in the lower halves of the contact fields of the line finder F "Fr (Fig. 5): S60, S64, S;,;, and S6, are four stations which are attached to the upper halves of the contact fields the cable locator are connected. Of these, too, are only the connections from two lines S64, S66 - brought up to their 'contact = sets.

The first seeker F, the group of hundred, is in the drawing by four of his brush sets wao, wbo, wco, wdo, wa i, wb i, wc i, wd i ... was, wb5, wc5, wd5, wa6, wb6, wc6 , wd6, which belong to its main switch, reproduced and by the brush set w1 which belongs to its secondary switch. The main switch and secondary switch each have a special additional contact arm or brush Wp or Urs (Fig. 4). Ei and EZ (Fig.6) are the moving magnets of the main switch, and E; and E; represent the moving magnets of the sub-switch of the viewfinder F1. DS, (Fig. 6) is a switch which corresponds to the switch ds according to FIG. 3 and which belongs to the main switch. DSZ is a similar switch that belongs to the secondary switch of the viewfinder F. OS i represents a wave switch of the viewfinder S i. Tp and s. Are test relays, and rl is a reset relay of the viewfinder F i. The reset relay controls four switches r "r., R" r . Which, to simplify the drawing are indicated in addition to the motion magnets E, which they control. These switches are shown in their rest positions. As soon as the reset relay yl is energized, it moves these switches and transfers them from their rear contacts to their front contacts.

The viewfinder F is also provided with a through relay CR, which switches the line of a calling subscriber through to the connector finder (Fig. 7), as soon as the searcher has found the calling line.

Of the fast-working seekers F "F2 are in a group of one hundred only a few, e.g. B. two or three, provided. From the second viewfinder F2 are only shown as much of its circuit details as is necessary to understand the system appears necessary.

The task of the contact brushes W ″ and ff z, the main and secondary switches of each viewfinder, is to set the contact arms or brushes wa, wb, wc, wd and W, to fixed contacts, which by means of lines o4, 05 etc. with calling The brushes WP, WS are therefore to be called adjusting brushes. The adjusting brushes move across contacts p "to Po and pö to p ', which are connected to two sets of permutation lines o to 9 and o' to 9 '; the purpose of which will be explained below. The fixed contacts po to ps and pö to p ', all searchers in a hundred group, are switched multiple times by means of permutation lines o to 9 and o' to 9 '. Each group of hundred has two groups of conductors of permutation that belong to it alone.

Each of the 100 participants in a group of hundred is through a sentence Multiple lines, -, vie - z. B. o4 "or o5, to a set of fixed contacts .in each finder F1, F., connected to the group. The fixed contacts which the multiple lines are connected to are through the brush sets wa, wb, wc, wd coated.

The subscriber lines are connected to the fixed contacts of the searchers in the order illustrated in FIG. So is z. B. the subscriber, S "" connected to the first set of fixed contacts in the first row of contacts, while the subscriber S "1 is connected to the second set of contacts of the first row, S", to the third set of contacts in the first row, etc. In the FIG. 5 shows only the connections of two subscribers o4 and o5 in the first row of contacts and of two subscribers 54 and 55 in the sixth row of contacts. The brushes wa o, wb o, wc o, wd o move over the contact sets of the first row, and the brush set wa i, wb i, wc i, wd i brushes the second contact row, the brush set wa 5, wb 5, wc 5, wd 5 brushes the sixth row and the brush set wa 6, wb 6, wc 6, wd 6 the seventh row of contacts. The third, fourth, fifth, eighth, ninth, and tenth row brush sets and fixed contact sets are omitted to keep the drawing as simple as possible.

The set of brushes wcr o, wb o, wc o, wd o of the first row of contacts is connected to the first set of contacts of the viewfinder secondary switch by a set of lines wl, while the set of brushes wa i, wb i, wc i, wd i of the second row of contacts is connected to the second contact set of the secondary switch, etc.

To a particular subscriber line, e.g. B. o4, with a connecting line a, b, c, d, which leads to a connector finder (Fig. 7) to connect, all brush sets w are rotated so far that one of the brush sets wao, wb o, wc o, wd o rests on the fixed contact set, which is connected to the line ö4. And the brush set of the secondary switch IV 'is rotated until it is set to the brush set of the main switch, which is connected to the subscriber line. The calling subscriber line 04 is then wa o, wb o, wc o, wd o ... a, ' . . . Wi be connected to the connecting line a, b, c, d .

If the calling line is connected to a contact set, which is located in the above the brush sets wao, wb o, wc o, uyd_o_-etc. located half of the contact field, a moving magnet E., similar to the magnet e2 (Fig. 3), will come into effect and move all sets of brushes up to the upper half of the contact field. But if the calling line is connected to the lower half of the contact field, the moving magnet El, which is similar to magnet e (Fig. 3), is excited and moves all the brush sets of the main switch to the lower half of the contact field.

Furthermore, if the calling subscriber is represented in the half of the contact field, which is to the left of the line -iy, the brushes W, of the secondary switch are moved by the motion magnets El in the direction of the contact sets to which the brush sets wa ö, wb o, wc o, wd o. . . wa. i, wb i, wc i, wd i to wa4, wb 4, wc4, wd 4, which are to the left of the line xy, are connected. If, on the other hand, the calling party is connected to a set of contacts to the right of line xy, then the brushes W are moved by the moving magnet E 'in the direction towards the fixed contacts of the side switch to which the brush sets wa 5 , wb 5, wc 5, wd 5 to wag, wb g, wc g, u. @ d g are connected to the right of line xy.

The direction of movement of the brush sets depends on the. Place in the contact field of the searcher in which the contact record of the calling subscriber is located. The calling subscriber unconsciously determine the directions of movement of the viewfinder by means of relays in "na ,, and iaz;, ra ', and by circuits that their line relay L.", Are brought l "" 4, etc..

The relays iii " in, determine the direction of movement of the brush sets wao, wb o, wc o, wd o etc. of the main switch, while the relays in '" m determine the direction of movement of the brush set of the secondary switch Ws. All subscribers whose numbers are represented in the one digit position from 0 to 4 are connected to contact sets which are located in the lower half of the contact field in FIG. 5. - The setting circuits of these participants are therefore set up in such a way that by means of the contacts ioo of the line relays they include the circuit do of the relay, which in turn closes the circuit of the moving magnet Ex, thereby causing the brush sets of the main switch to move downwards.

The corresponding line relay contacts ico of all participants, The one-digit parts of which are represented by 5 to g are used to close the circuit of the relay in_ ,, which is the circuit of the upward moving magnet E2 dominated, because the participants with the units from to 9 are at the top Half of the contact field connected.

All participants in the group, whose tens digits are represented by the numbers o to 4, are connected to contact sets, which in FIG. 5 are to the left of the line xy. The brush set W 'of the secondary switch is applied to the brush sets wa o, wb-o, WC o, wd o to wa 4, wb 4, WC 4, wd 4, which dominate the contact sets in the left part of the contact field, by the moving magnet E. ; which is switched on by the relay in. For these reasons, the setting circuits of the participants with tens digits from o to 4 are set up so that they close the circuit le through the contacts ioi of the line relays, which the relay l1; masters which the moving magnet E; causes the brush set WI to come into contact with the brush sets in the left half of the contact field of the main switch.

All participants with the tens digits from 5 to 9 are connected to contact sets in the right half of the contact field (Fig. 5). The movement magnet E. ", which causes the brushes ZP to adjust to the brush sets in the right half of the contact field, is controlled by the relay in;, and therefore the subscribers with tens from 5 to 9 can use the contacts ioi of their line relays to control them circuit ri of the relay;.

It can therefore be seen that the relays in "11z_ indicate whether the calling subscribers are connected to the upper or lower half of the contacts field is, and that the relay is in; , m .'_, indicate whether the calling party is in the right or left half of the contact field is represented. Through their interaction the relays n1 ;, m 'indicate in which quarter of the contact field the calling party Participant is located. Is z. B. the participant in the lower left quarter connected, z. B. the relays in, and m; get excited, and these would the moving magnets El and E; - bring it into effect.

The line in question in the quarter of the contact field is displayed by means of the permutation lines o to i and o ' to 91. The permutation lines o to 9 determine the point p "to pf at which the adjusting brush W" of the main switch is to stop, and the permutation lines o 'to 9I are used to stop the setting contact WS of the secondary switch at the point which corresponds to the calling line.

The permutation lines o to 9 and 'o' to 91 correspond to the tens and tiner digits of the calling subscriber. The contact 192 of the line relay lop of the subscriber oo is connected to the single permutation line o, while the contact 103 of this relay is connected to the ten permutation line o '. The contacts Tot and Toi of the subscriber oi are connected to the ten permutation line o and the one permutation line i, respectively. The decorative bonds between the permutation lines and the line relay contacts 102 and 103 of the 100 subscribers change in such a way that different permutations arise, and each permutation indicates a different setting of the brushes of the main and secondary switches of a viewfinder F1, F2. So if the subscriber calls 05 , the main switch of the viewfinder is set so that the setting brush WP is connected to the single permutation line 5 and the setting brush Ws is connected to the ten permutation line o, and the brush sets wa ö, wb o, @ WC o, zecd o ... wa i, zub i, wr i, wd i and W 'are moved in accordance with their adjustment brushes, the subscriber o5 would be moved through the sixth contact set in the first contact row and through the brush set wa o, wb o, wc o , wd o and above, w '' ... . W 'be connected to the connecting line a, b, c, d .

It should now be assumed that a participant, e.g. B. No. 59, a Establishes a connection with another participant.

As soon as the calling subscriber S6 "picks up his receiver from the hook, he closes his line loop a69, b5g, and his line relay 1" in a known manner - is then excited by a current from the negative pole of the office battery via the contact iio of the call folder FS, common power supply iii , Contact 105 of the 'line relay i ", l", 112, b59. S63, 69, 113 to earth. The line relay 1 ″ is energized and opens its contact 105, while it closes its contacts ioo, ioi, 102, 103, 104.

Since the subscriber S53 is connected to a contact set that is in the upper half of the contact field to the right of the line x-y (Fig. 5), so the upward movement relay in, and the relay m; that's the setting on the right half of the contact field caused to be excited to the viewfinder on the calling line. For this reason- the anchor contacts are ioo and io.i of the line relay are connected to the circuits u and ri; and the relays in, and energized in circuits, - which. from the negative pole across FS, ins; 1z, ioo to the earth and from the negative pole via i112, ri, ioi to the Run earth. At the same time, the ten permutation line becomes 51 and the single permutation line 9 through contacts 103 and pulled to ground.

The move up relay closely closes its armature contact and prepares a circuit for the move up magnet E, and the relay ir; prepares a circuit that causes the excitation of the moving magnet E2 of the secondary switch. The call folder FS is in series with the relay 2 energized a2 and causes during tightening of its armature i 16 an instantaneous closure of the contact 117. This is a rush current from the negative terminal 117, cause line St, contacts i 18 11 9 of the wave switch of first free finder (e.g. F1), wires 123, 124., magnets E., 'and E, contacts 128 and 132, wires ril, 2z1, contacts i 15 and i 14 sent to earth. The magnet E .; is energized and moves the brushes W'1, Ws of the sub-switch by one step in the direction after the contact sets which are connected to the wires e ',. - The magnet E. is also excited and moves the brush sets wa o, wb o, wc o, wd o .-. . wa i, züb i, wc i, wd i etc. as well as the adjusting brush W, of the main switch by one step upwards.

For the sake of simplicity it should be assumed that the magnets El, E2, E ,, E .'_, each by an indexing pawl with each current pulse the switching shaft move your switch one step forward, and that with every step new contact set is reached.

It can be seen that the two switching magnets El and E; with the line 123 and the two incremental solenoids E ,, E; are connected to line 124. The current surge that is sent from the call recorder FS via the starting line St, however, always only affects one of the magnets El, EZ and one of the magnets E i or -El, because at any one time only the circuit of one switching magnet of each magnet pair through the relay ntl, zttn, zn, i , m; closed is.

As soon as the main switch of the viewfinder is moved out of its rest position, the shaft switch 0S1 closes its contacts i2o, i2-1 and 122 and opens its contacts 118 and Zig. The main switch is arranged so that it performs its first step, as soon as the starting current surge through the annealing line St ceases to flow, so that the C ontact 121 through which the starting line for the next searcher F, expanded ', experiences no closure before the starting current impulse has ceased and an erroneous start-up of the next finder F2 is excluded.

As soon as the contact 122 is closed, an interrupter 133 is connected at the point of the starting circuit with the moving magnet, and current impulses then flow from the negative pole via 133, 134 to the line 138. ", tone of the line z38, the current impulses flow to the Magnet pairs Ei, E. and E ,, E!. However, only the circuit of one magnet of each pair is closed by the relays ntl, in ', m11, mst in each case. In the assumed case, these are the circuits of magnets E. and E' , which are closed at contacts 114 and 15, respectively, so the current surges will only excite magnets E 1 and E> and cause the brush sets of the main and secondary switches to rotate upwards.

It will of course happen that the main switch as well as the auxiliary switch are moved downwards or that the main switch is moving its brush sets downwards, while the secondary switch moves its brush set upwards and vice versa.

In the assumed case, the brush set Wl is moved one step upwards, whereupon the circuit of the magnet E is interrupted by the excitation of the tens test relay sp. This is because a circuit is closed for this test relay as soon as the adjusting brush of the secondary switch reaches the ten permutation line 51. "This circuit leads from the negative pole of the Zehnerprüfrelais about 14.1, -i42, Sp, Ws, p;, 51, 143, 103 to ground Upon energization of the - sp relay the interrupt occurs the circuit of E._ ', at 136. and the brushes W1, W are stopped.

The main switch brushes continue to move until the adjustment brush lever reaches a grounded permutation line. In the assumed case, until the permutation line p is reached. The circuit of the unit test relay is then closed from the negative pole via 141, tp, Wr, p9, 144, io2 to earth, and the test relay tp opens the circuit of the magnet E. at contact 135. The brushes w1 5, wb -5, wc 5. wd 5 now remain on the contact set bc., To which the subscriber SS ;, is connected, while .the brushes W1- rest on the contact set of the secondary switch, which is triggered by w; with the brush set what, wb 5, wc 5, wd 5 is connected. Thus, the calling line is connected to the connecting line a, b, c, d by its wires 59, bc ", the brush set wa 5, wb 5, wc 5, wd 5, lines w 1, brush set W1.

At the moment when the two test relays sp, tp are energized, a current circuit is closed from the negative pole via .137, 145, ER- to earth, and the switching relay CR then closes its contacts 146, 148, 49. By closing the contacts 148, 149 the calling line after the connector finder VS (Fig. 7) is switched through, while the closing relay co., Of the calling subscriber is energized by the closing of the contact 146 by a current that takes its way from the earth through the relay CR , Contacts 146, 147, line c, brush of the brush set TV 1, brush zx,! C 5, the fixed contact on which the brush u, c 5 rests, line c "" isolating relay co "to the negative pole of the battery Isolation relay co "is excited by this and disconnects the line relay l" from the calling line a ;; "b; @ off, so that the line relay is de-energized.

As long as the line relay is energized, the circuit of the relay in, or the relay in, remains energized by the current flowing through the call recorder, and the call recorder interrupts the power supply rjj to all the line relays of the group of hundred and thereby prevents that during the setting of the calls any other subscriber of the group of hundred for the connection of the line searcher used. This state only lasts until the line finder F1, F. etc. has established the connection with the calling line, and since the average time for this setting is the time that the line finder needs to execute 2.5 contacts the blocked state of all other lines in the group of hundred only for a fraction of a second, so that a subscriber calling later will practically not notice the blocking.

In a manner to be explained later, the line searchers are always kept in connection with a free connector LF (FIG. 8) or group selector GTV by their verb: ndersucher VS (FIG. 7). It is at the moment when a line finder, z. B. F1, is started by the starter surge via the starting line St, also the connector LF, to which the line finder is connected by the connector finder VS, started by a current surge that takes its way from the negative pole of the battery via contact 117 of the call folder, St, i 1 8, line Zoo (Fig. 6 and 7), contact arm 201, line 207, contact 2i3 of a wave switch OSz of the connector LF (Fig. 8), moving magnet 14 of the connector, 215, 216 to earth. By means of this current surge, the brush set czf, bf, cf, df is brought out of rest by means of the rotary magnet 214, and the shaft switch OS. closes its contact 217, whereby a breaker 218 is connected to the current circuit of the rotary magnet 2I: 1. Current surges now flow from the negative pole of the battery via 218, 217, 217, 2I._1, 215, 216 to earth, and the rotary magnet 214 is alternately excited by these current surges, so that the brush set af, bf, cf, df is fixed over the - @ len contact sets of the connector moved step by step until the contact set is reached to which the calling line 1 "is connected. As soon as the brush set reaches this line, a circuit is established, from the negative pole of the battery via 219 (Fig. 6 and 7), contact arm 202 of connector finder VS, 2o8 (FIGS. 7, 9 and 8), relay 220, brush df, line df "(FIGS. 8 and 5), brush wd 5, middle brush from IYl, line d to Positive pole. The relay 22o (Fig. 8) opens its contact 2I6 and thus the circuit of the moving magnet 214., so that the connector LF stops on the line l "of the calling subscriber S".

As soon as the line finder F1 established the connection with the calling subscriber line, the line relay LR of the group selector (Fig. 9) was energized by a current from the battery B via the upper winding of the relay LR, a1, 221 (Figs. 9 and 7), 204 , 223, 22l, 148 (Fig. 6), a, brush set TP, zi, 2a 5, a ", calling subscriber station S"",b,", zeib 5, brush of brush set W1, b, 149, 225 (Fig 6, -5 and 7), 226, 203, 222, b l, 223, lower winding of relay LR, battery B. The line relay LR closes its contacts -225, 228 and opens its contacts 226, 227. In the meantime is also the relay 231 (Fig. 9) is energized by a current from the negative pole of the battery via 231, 232 (Fig. 8), contact 233 of the shaft switch OS @ to earth. As soon as the relay ER is energized, a current flows from the negative pole via 234, trigger relay. RR, contact 228, line 235 to earth. The trip relay closes its contacts 236 and . -J37 and opens contact 238. Closing contact 236 closes a circuit for relay 239 (Fig. 8) of the connector, which can be traced from earth via 236, 240, 239, brush cf, line cf ;, "Isolation relay caz ;, of subscriber S", after the negative pole. The -relay co- "now receives current from two sides, on the one hand from earth via -236 and relay 239 and on the other hand from earth via relay CR, contact 14 (i, 1.47, line C us,% v. Via the already followed current path.

As soon as the line relay 1. "of the calling line as a result of the excitation of the isolating relay co" is de-excited by the current flowing through the relay CR, it opens its holding circuit at contact 104 and at the same time also the circuits of the relays m. And W., «-Which close the circuits of movement -, - magnets of the line finder. The line relay also disconnects the earth connections to the permutation lines 5 'and g at the same time. The call folder FS is de-energized and the common power supply 1 i 1 is closed at 1 Io. However, the dropping of the armature 116 does not cause the starting circuit at contact I17 to be closed.

The opening of the ground connections of the permutation lines 51 and g causes the test relays sp and tp (Fig. 6) to de-energize, causing the circuits the moving magnets of the line finder at 135 and 136 are closed. One However, complete closure of the circuits of the motion magnets does not take place, because contact 134 is open due to the energization of relay CR.

The switching relay CR is still kept energized for the time being the current flowing from earth via CR, 146, 147, c, rc, c 5, c,;, and co5, to the negative pole flows.

If a second participant calls now, another one becomes freer Set line finder F. to the calling line, and this line becomes one Connect another connector L F or another group selector GW.

If the calling subscriber, 'who has been connected in the manner described with a free group selector G13', wants to have a connection with the number 354, sc first sends a series of three current pulses through the relay LR by means of his number switch. With every interruption of its line loop, the line relay LR releases its armature, and a current surge flows from the negative pole via 234, 226, 244 337, lifting magnet HM of the group selector to earth: This causes the contact arms ag, bg, cg to graze up to the third row of contacts as Strowgerwäbler trained group voter uplifted. After the third interruption of the line loop, the line relay remains energized for a longer time, so that the reversing relay CR (Fig. G), which is energized during the back and forth movements of the line relay armature from the negative pole via 33q., * RR, CR, earth, at 228 is short-circuited and thereby drops its armature. Here, the contact spring 242 lies against the contact 230 and pushes it away from the contact 22g. A short current closure occurs, during which a current surge flows from the negative pole via 234, 2-25, 229, 23o, 242, 243, control magnet S1vI, to earth. The shaft contact 234 is closed as soon as the group selector carries out its first stroke step. Due to the current surge through the control magnet S111, the contact arms 2-23, 224, 2-14, 245, 3462 247, 248, 249, 25 0 , 25 1 , 252, 253 of the control switch are ver from their first positions to their second positions -: # rhoben. The contact arm 345 closes the circuit of the rotary magnet D JU in its second position, and current surges now flow from the negative pole via the interrupter 254, 245, D111 to earth. The control switch of the group selector has a second on. Triebsmagneten S_11 =, whose armature is influenced by the rotary magnet D11 in the usual way with Strowger voters, i.e. when the armature of the rotary magnet DII is pulled for the first time; not only are the contact arms ag, bg, cg turned one step, but it also becomes rler Armature of the control magnet SH. pressed against its magnetic pole. When the first occupied contact set is reached by the contact arms ag, bg, c-, the armature of the control magnet S11. held in its attracted position by a current flowing from a ground connection of another group selector, which has already taken the line cv into use, via the trip relay 255 of this group selector and via the contact arms 246 and cg of the same and also via the line cv, contact arm cg , Line 256 of the searching group voter, contact 246 of the same; Control magnet SM. flows to the negative pole. ' The contact arms ag, bg, cg are rotated step by step in a known manner until a free line is found. The contact arm cg will then rest on a line cv, which is only connected to the negative pole via a relay 258 (FIG. Io) with a very high resistance. As a result, the control magnet S1i 2 drops its armature, so that the contact arms of the same pass from their second to their third positions. The circuit of the rotary magnet DM is then interrupted, as is the connection of the line relay LR with the line of the calling subscriber. The contact arm cg is connected to earth via the low-resistance trip relay 255, whereby the line av, bv, cv that has been used is brought into the occupied state. As a result of the separation of the line relay ZR from the line a1, b, _, the relay ZR and also the relay RR are de-energized. If the relay RR is de-energized before the control switch changes from the second to the third position, the tripping magnet AM of the group selector is excited by a current from earth via 238, 26o, 253, AM to the negative pole. Würde.also the calling subscriber a listener to attach, before the group selector Gli leading '-on a free TI for a Leitungswählet L' av connecting line; bv, cv is set, the closing of the contact 238 as a result of the de-energization of the trip relay RR of the group selector GW would be triggered. This would also result in the connector LV being returned to its rest position in a manner explained later. The excitation of the release magnet A111 would close the circuit of the relay 262 of the connector VS (Fig. 7) - earth at the positive pole or full earth - via contact 261, line 211, contact arm 205 of the connector finder, relay 26 = to the negative pole. The relay 262 closes its contact 263, and a current surge then flows from the negative pole, 263, rotary magnet Dlvlv, breaker 264 to earth. The rotary magnet D11v moves the contact arms 2o1, 2o2, 203, 204, 205, 2o6 one step further, and if the next line of the next group selector is occupied, the electronic holding circuit of the relay is kept closed. This holding current flows from the negative pole via 262, 265, contact arm 2o6, line 212 of the next group selector and then either via contact 236 or via contact 25o of the next group selector to earth. If the line leading to the next group selector has already been seized by another connector finder, the holding current of the relay 262 can also flow to earth via the contact arm 2o6 of this other connector finder and its contact 266. However, as soon as a free line is found by the connector finder, the holding circuit of the connector finder VS is not closed by a contact 236, a contact arm 25ö, or a contact 266. The relay 266 then drops its armature and opens the circuit of its motion magnet DMv at contact 263. The connector finder stops and connects the fast-working line finder F "to which it is assigned to a free group selector GTT '.

When the relay 262 is energized, a contact 265 is closed at the same time, which results in the excitation of the release relay rl of the fast-working line finder F. The release relay r1 then resets the fast-working seeker F to its rest position in a manner to be explained later.

The connection process when establishing a connection between your subscriber S., and the subscriber 354 was ailf up to the setting of the group selector GW. a free line selector LIT '(Fig.lo) of the desired' Hundertgruppe leading @ 'erbindungsleitung-äz "bv, c2, has been followed. By the transition of the control switch of the group selector GU' from the second to the third position, the lines a ,, b, after the lines a2 #, c-Ilirchgesclialtet, and at the same time a relay 25g is switched on to the line b, in the group selector. A circuit is then closed from the negative pole via the relays 259, 251, hl, 222 ( Fig. 9 and 7), 203, 226, 223 (Fig. 7 and 6), 14.9, b, contact arm of the brush set TF1, Wb 5, h "", subscriber station S "", cr; @ "Ulu 5, brush des Brush set TT », a, 148, 22.a., 223, 204 (Fig. 7), 221, a, (Fig. 9), 2s7, ag, aV, upper winding of the relay LR, (Fig. 1o) to Earth. The relays LR, and 259 `` -grounds are ex-excited.

Simultaneously with the connection of the relay 259 all the line b, the circuit of a slowly operating relay 26z is prepared by the contact, 252 of the control switch. However, this circuit is interrupted at contact 263 by the excitation of relay 259 before relay a61- has the opportunity to close its armature contact 264. -The calling subscriber sets the line selector to zero on the desired group of ten of the desired line by breaking his loop five times in quick succession by means of his numbering switch. With each interruption, a current surge flows from the negative pole via 266, 269, 270, 271, 272, lifting magnet H111 of the line selector to earth, and the contact arms as, bs, cs of the line designed as a Strowgerwähler-. selection selectors are raised up to the fifth row of contacts.

The interruptions of the subscribing loop cause de-excitation of the relay 259. With each de-excitation, the relay 26111 receives a current surge from the negative pole via 252, 263, 26111 to the positive pole. It pulls its armature 264 and thereby closes the circuit of the control switch unit S111, (earth, 264th, S17, negative pole). The relay 612 is slow-acting and keeps its armature contact 264 closed during the power interruptions at contact 263. However, as soon as the subscriber loop is permanently closed again after the hundreds of electri- cal surges have been sent, the contact 263 is opened for a longer period of time. Here, the relay 2612 drops its armature and opens the circuit of the control switch magnet SJT ,. The control switch magnet SII. then lets its armature fall back and then brings about the transfer of all of its contact arms from the third to the fourth position. Here the relay 259 is completely switched off on line b. Through the contact arm 2d9 of the control switch, the line 2i i is grounded and this energizes firstly a relay: 28o iin Ver linder LF and secondly the '\ #, reiterstellrela: s 262 (Fig. 7) of the connector seeker. The circuit of relay 28o runs from earth via 249, 261, 281, 282, -28o to the ' Mintispol. The relay 28o then closes the contacts -283, 284 and> y85. Through the contacts 283, 285 it establishes a connection between the calling subscriber and the line selector LW. The circuit of the next:, teaIrelay of the connector finder runs from earth via .2d.9, 211, 2o5, 26,2 to the negative pole. The relay closes its contact 269, whereby the moving magnet D 1I << of the connector finder is switched on, which now moves the contact arms of the connector finder step by step until a line leading to a free connector or group selector is found. The relay 262 keeps the contacts 223, z26 open during the search process for the verb: indersuchers, so that no interference is caused by running over contacts that are connected to the lines of speaking participants. As long as the contact arms of the connector finder meet busy lines; remains of the contact is closed via the contact 265 and 2O6 leading holding circuit of Weiterstellreiais 26z in the manner already described and is then interrupted when a free line is found.

When the relay 262 is energized, a contact 265 is closed, whereby the reset relay rl of the fast working line finder F1 (Fig. 6) is excited by a current that takes its course from earth via 265, 286, r1 to the negative pole. The relay r1 immediately opens the contact 147, whereby the switching relay CR, which is triggered by a via the contacts 46, 147 and via the isolating relay co "des. calling party is excited, de-excited, and opens the contacts 148, 49 while it closes contact 134. By closing the contact 134, the interrupter 133 is applied via 122 and 134 to the line 138, which Via the contacts 135 and 136, the current impulses emitted by the interrupter 133 after the magnet pairs El, E2 and E; , E; continues. From each of these pairs of magnets only the magnet E. or E. current surges will be received, which was previously in the Setting the line finder on the calling line was effective because it will when setting the main switch and the auxiliary switch of the line finder by the switches DSI, DS @, which are built like the switch ds (Fig. 3), always only the contact C corresponding to the magnet in question is closed. In the assumed So the trap becomes the contact C .., which corresponds to the magnet E., and the contact C` "which corresponds to the magnet E.`, closed -: - en. So there are current surges i. vom:, vlintispol via 133, i22, 134, 138, 135, E "C_, DSl to earth, and 2nd from Negative pole via 133, 122, 13d., 138, 136, E ;, D.S. after Earth. 'To avoid that the just described current paths of the magnets E., E ._, `when driving over the adjusting brushes W '"WS via earthed contacts in permitting activities caused by excitations from Test relays Q, sP are interrupted, the circuits of these relays at the contact 141 of the reset relay rl held open until the line finder is in its rest position reached, in which the wave switch OSl opens the contacts 122 and i2o and thereby simultaneously the current impulses flowing through the magnets E., E., 1 and the through - the reset relay r1 interrupts the holding current flowing. DerLeitungssucherFl is now for the connection of another calling line with a through the assigned connector finder VS already selected free group selector ready.

As a result of the setting of the connection finder b'S to a different group selector GW, as the one used for the speech connection, is the circuit, the one from the negative pole via 2i9, 2o2, 2o8, 22o, df, df6I, ard 5, brush of the brush set W1, which runs after the positive pole, is interrupted and the relay 220 (FIG. 8) closes its contact 216. The circuit of the rotary magnet 214 of the connector is however still kept open by the relay 239, which is in series with the isolating relay co " is excited and holds its armature contact 215 open.

During the longer closing of the subscriber loop after setting the line selector LW to the row of contacts in which the line of the desired subscriber is located, the control switch of the line selector is switched off as a result of a current flow (negative pole, 266, 267, 290, 294 292, 293, control switch magnet SMB, i earth) transferred from its first to the second position.

The mode of operation of the control relay set LRl, RR " CRl corresponds to the mode of operation of the control relay sets provided in the group selector GW and therefore does not need to be discussed again.

As a result of the transition of the contact arm 272 of the control switch into its second position, the rotary magnet DM is connected to the setting circuit 27o of the line selector. Furthermore, the negative pole of the battery is connected by the contact arm 294 to the lower winding of the line relay LRI, and this connection replaces the connection to the b-line, which was disconnected from the b-line by switching off the relay 259 in the group selector. The connection to the negative pole via the contact arm 294 is made before the relay 259 in the group meter is switched off by the transition of the contact arm 251 into the fourth position of the b-line. This is achieved in that the slow operating relay 261 drops its armature later than the relay CRI. Since the interruption of the by the contact 264 and the control switch magnet SM occurs later than the closure of the circuit of the control magnet S1113. the control magnet SM, the transfer of the group selector control switch from the third to the fourth position later than the control magnet S1113 connects the negative pole via 294 and the lower winding of the line relay LRI with the b line. The line relay LRI does not lose its excitation when changing the circuits. It now receives power via a current path from the negative pole of the battery via 2-94, lower winding of the line relay LRI, bv, bg, 248, b1 285, bf, bfzi3, b59, S "" arg, afsa, af, 283, ai, 247, ag, ao, upper winding from LRI to earth. The calling subscriber who wants the number 354 now causes four interruptions in his subscriber loop through his number switch, and it. During the to-and-fro movements of the armature of the line relay LRI, the relays RRl, CRI are both kept energized, and each time the armature drops, a current surge flows from the negative pole via 266, 269, 270, 271, 272, rotary magnet DM, to earth. The rotary magnet then sets the contact arms as, bs, cs to the fourth line in the fifth row of contacts. Now the subscriber loop is closed again, which causes the changeover relay CRI to drop again due to the short circuit at 268 and thereby closes the changeover circuit from the negative pole via 266, 267, 29o, 29I, 292, 293, control magnet S1113 to earth. The control switch of the line selector is now moved to the third position, and the circuit of the test relay 300 is closed by the contact arm 297 from earth via 297, 300, cs, cl. C.4, isolating relay co ", the line of the desired participant to your negative pole. If the desired line is free, the test potential on the test line -cl "" will be sufficient to energize the test relay 300. This then attracts its armature and closes the contacts 301, 3o2. By closing the latter contact, the ringing current relay RL is energized (negative pole 3o2, 3o3, RL, earth). The relay RL closes its armature contacts 304, 305 and thereby connects the ringing machine LM with the contact arms as, bs, and ringing current now flows from L3,1 via the ringing current cut-off relay 307, 304, as, al ", a.4 to the called station S ", b", bl ", bs, 305, interrupter 3o6 back to the ringing machine LM. As soon as the called subscriber picks up his receiver from the hook, the ringing current flowing through relay 307 is amplified to such an extent that relay 307 closes its armature contact 3o8 and thereby energizes relay 309 (negative pole. 308, 309, earth). The relay 309 then closes its holding circuit (earth, 309, 310, 311 of the wave switch, negative pole). At the same time, the relay 309 at contact 303 opens the circuit of the ringing current relay RL, so that this opens its contacts 304, 305 and the contacts 3i2, 313 closes. Since the contact arms 295, 296 are in their third positions, the called subscriber now receives power from the battery B = via the lower winding of the relay AR ,, 296, 313, bs, b134, b54, S54, a.4, as ., as, 312, 295, upper winding of AR, after battery B, back. The relay AR attracts its armature 314. This brushes past the contact spring 315 .

If the called subscriber first hangs his receiver on the hook at the end of the conversation, the current flowing through the relay AR is interrupted. The armature 314 drops and in the process brushes past the spring 3I5, the spring 315 being pressed against the spring 316. As a result, a current surge is sent from the negative pole via 316, contacts 317, 318 of the `wave switch of the line selector, trigger magnet A11, to earth, which triggers the line selector. At the same time a circuit is closed from the negative pole via 3I5, 3I6, 317, cv, eg, 256, 246, trigger relay 255 of the group selector to earth. The tripping relay 255 closes the contact point, whereby the tripping magnet AM of the group selector is excited (earth, 320, 253, all after the '2 \ linuspol). This brings the group voter back to its rest position. As soon as the contact arm 25o of the control switch of the group selector removes the connection between the line 321 and earth, the holding circuit of the relay 28o and also the circuit of the relay 239 are interrupted. The relay 28,) opens the connection between the contact arms af, bf and the lines as, b, and thereby prevents disturbances in lines, which are being discussed, from occurring when the brushes af, bf are passed over the contacts of these lines. When its armature drops, relay 239 closes contact 215 and thus the circuit of rotary magnet 21: 1 (earth, 216, 2i5, - 21d., 217, breaker 218, negative pole). The rotary magnet 21: 1: now turns the contact: ürsteii af, bf, cf, df until they reach their rest position, in which the @fellenschalter OS. the contacts .233, 217 opens. By opening the contact 217, the circuit of the rotary magnet -21.1 is interrupted and the brush set af, bf, cf, df is stopped.

On the line selector, by pressing contact 311 at the achievement (, he rest position of the line selector of the holding -: _ circuit of the relay 3o9 open, so that this relay can drop its armature. It can be found then all parts in their rest positions again.

If the calling subscriber hangs up his handset first, it will Trip relay RR, short-circuited by the permanent closure of contact 323. It then lets: = drop an armature and closes contact 322. This causes the negative pole is connected to line cv via 322 and 317, with the trip magnet AH, of the line selector and the trigger relay 255 of the group selector, at the same time - The release is hereby initiated and otherwise progresses in the same way as when triggered by the called party - it happened.

When the last reversing current surge occurs, that is, when the Transfer of the control switch of the line selector to the third position, the Test relay 30o not energized, a summer generator 325 is connected to the line av connected via 326, 325, 324 .. The calling subscriber -receives then a desetztsignal and hangs his receiver on the hook. The voters will then triggered in the manner already described.

Particular attention should now be paid to the circuitry for setting the slow-acting connectors on the calling lines. be instructed. The circuit contained in FIGS. 5, 6, 7 and 8 is shown especially in FIG. 11 for the sake of clarity. With this circuit it could happen that two slow-acting connectors tune into the same calling line. Suppose z. B. that the fast working line finder F; is connected by the associated connector finder with the slow-working connector LF3, that the line 1 "" calls, and that the fast-working seeker _F, tunes in to the line h ". The slow-working connector LF, now appears on the line 1u ". While the Sprecliverbiildung the line l "" is now progressing through the other ZVähler (group selector, etc.), z. For example, another line 1,; i, and this call is picked up by a further, fast-working searcher F '"which is connected to the connector LF, for example by means of its connector searcher the slow-working Verhinder LF, the contact of the line l "" is reached, before the - first rapidly working line viewfinder F;. is separated from this line the relay 32o which the Bewer; ungsmagnetenDlbl; off the N genetic idem, would then receive current via the line 1 "", which is connected via wd, 1171, to the positive terminal of the battery, and as a result, in addition to the connector LF ;, a second connector LF, would be set to the calling line. The later calling line L "1 would then not properly connected.

A circuit is shown in FIG Mistakes are avoided.

After this circuit, the moving magnet (DM ", -Dlllb) of each connector (LF", LIw) is initially caused by a starting current surge to move the switching shaft of the connector from the rest position in the manner shown in FIGS. 5, 6, 7 and 8 bring it into the circuit of a breaker 218a . Here, a wave contact ky indicated in FIG. 12 is closed at the same time, which closes a circuit of a relay 320a. This circuit runs through the contact arm of the connector finder, e.g. B. 3o2, which is currently in connection with the connector LF ". The excitation of the relay 320a will in this case be done by a current flowing from the positive pole via a resistor X", 320a, ky, 3oav, resistor yb to the negative pole flows. The relay 326 "is now kept energized by this current until the contact arm of the connector LF" hits the line with which the fast-working seeker FU has established a connection. At this moment the relay 32o "is de-energized by a short circuit and it then opens the circuit of the motion magnet DM, Ein: Short-circuiting the relay 32o" would occur when the connector LF "strikes conductors with which other fast-working seekers, e.g. F ", just connected, cannot take place. In such a case a current surge would occur from the positive pole via LF ", F", " to the negative pole. The current flowing through resistor X" would be reduced by the current via y. » The current flowing through the relay 32o "is increased and the current flowing through the relay 32o" is weakened. The resistance y "is, however, such that this weakening is not sufficient; to influence the relay 320a .. The relay 320a will therefore only be de-energized when the connector F "is connected to the line on which LFL has been set Anchor stalled by 320Q.

A deficiency of the circuit of FIG. 12 is that the relay 320a because of the de-energizing by short-circuiting his Wickhmg have the tendency would slowly drop its anchor. This could mean that because of the non-immediate opening of the circuit of the moving magnet DM " Prevents LFa from being moved beyond the calling line.

. In order to cause the relay 32o ", 22o" to drop its armature quickly, it is expediently designed and switched in the `@jeise indicated in FIG. 20. The relay receives two differential windings Xd, Xe the prevention of the closing of the - shaft contact k "y is the relay by a via X,., X'd, XE @, y ,. The current Xd is increased somewhat and the current in X is weakened a little with each encounter of the connector LF on a line connected to the negative pole via a midstand y " . However, the effect of the N winding Xd cancels the effect of the winding X ,, only when the line connected to the negative pole via y is reached by the connector LF. Then, due to the partial short-circuit of X ,, and the simultaneous current amplification in Xd, a complete compensation of the magnetic effects of Y, and Xd will take place, and. the armature of relay X., Xe drops out immediately. As can be seen from FIGS. 1.2 and i20, any order in the order of the calls forwarded by the switchgear F0, FL and via the auxiliary switches 202a, 302L set to the connectors LFa, LFL is superfluous and irrelevant for the correct setting of the same. Any type of setting switchgear F0, FL can be used, because even if multiple calls are forwarded to the connector randomly or simultaneously and, as already described, several connectors L F- ", L FL are looking for lines calling at the same time each connector regularly with the help of the special fuse resistors y ", yb, X0, Xi but only establish a connection with the line on which the setting switchgear, z. B. F ", which passed the call on the line to the connector via auxiliary holder 302b assigned to it.

The system described can also be used for semi-automatic telephone systems be used by a civil servant apparatus for everyone who works quickly Viewfinder and the associated connector finder is inserted.

Claims (3)

PATENT CLAIMS i. Circuit arrangement for telephone systems, in which the connections are made with the help of electromechanically adjusted switching mechanisms, characterized by several, - if necessary simultaneously working, automatic switching devices (F), whose fixed contacts lead to the subscriber lines, and whose movable contacts follow the calls of the subscribers Voter control devices (VS) are passed on; Which connection devices (L F or GW, LW) can be used to set the calling and the called line or group of lines at the same time. 2. Circuit arrangement for telephone systems according to claim i, characterized in that the setting of the connection switches (LF) on the calling line by the subscriber or the operator independent control devices happens while the simultaneous adjustment the connection switch (GW or L W) on the desired group or on the line of the desired participant by manipulations by a participant or an operator he follows. 3. Circuit arrangement for telephone systems according to claim i, characterized in that the connection device (LF) serving to connect to the calling subscriber is set in motion and controlled solely by automatically operating switching devices (that is, without arbitrarily handled control devices), while the simultaneously working, for connection to the desired group or subscriber line serving connection device (GU 'or LW) is set by a person determined number bursts. 4. "Circuit arrangement for telephone systems according to claim i, characterized in that the switching operations when establishing a connection in the manner of a four-string system unwind in such a way that a subscriber when calling first over a temporarily switched on ZVälilerpaar (F, VS) and then over a second pair of dialers (L F. LTVV) which is permanently switched on in the voice connection is connected A number current surge receiver (GW) is connected, the circuit being set up in such a way that if the subscriber is connected via the second switchgear during the current surge delivery and when the auxiliary switchgear is switched off, a disturbance of the current impulse delivery to the number rush receiver is avoided after An claim i with setting switches and connectors, characterized in that the setting switches (F), in addition to the setting contacts (Po, P1. . ., Po, P; ,. .) to regulate the setting of the connector have contacts (uld) via which the connector is stopped, contacts (wc) for the isolating relay circuits of the calling subscriber and also 11 number current impulse contacts (wa, wb). 7. Circuit arrangement according to claim i, wherein a group of connecting switchgear (LF) and a group of setting switchgear (F) is provided for a group of participants, characterized in that the movable via the contacts of a setting switchgear set on a subscriber line when establishing a connection Contacts of a connection switch are controlled in such a way that, even when several connection switches are working at the same time, they can only remain on the fixed contacts of the line from which they received their call. B. Circuit according to claim i and 7, characterized in that an auxiliary switch (VS) is assigned to each setting switching mechanism (F, Fig. I and 5), which switches the switching mechanism (F) assigned to it after each use with a selector (GW, LW ) that is neither occupied by a call connection nor by another auxiliary switch (T7S). G. Circuit arrangement according to claim i, characterized by such a design of the switching mechanisms that the moving contacts (wa, ze, b) of the setting switching mechanism (F) need to be painted less on average than the moving ones to reach the fixed contacts of the calling line Contacts (af, bf) of the connection switching mechanism (LF). Circuit arrangement for connectors, of which one of a group should adjust to a certain line according to claim i, characterized in that the adjustment of each connector is controlled by a relay (e.g. 320 " Fig. 12) whose winding is connected to the power source via a certain resistance at both winding ends, and that said resistors only allow an action of the relay (32o) causing the connector to stop when the connector is set to a calling line with which it was previously brought into relation via another switching mechanism (e.g. F "). i i. Circuit arrangement for connectors according to Claim 10, characterized in that the relay controlling the setting of the connector has two windings. which are connected in such a way that their magnetizing effects cancel each other out when the connector is set to a calling line with which it has previously been brought into relation via another switching mechanism (e.g. F "). 12. Circuit arrangement according to claim i, characterized in that the connection established via a rapidly operating switching mechanism (F) with a selector (GW) is replaced by a prepared connection via a slowly operating switching mechanism (LF) at the moment when "at the end of a series of impulses a reversing current surge of a transmitter station setting the voters'. 13. Circuit arrangement according to claim i and 12, characterized in that the start-up of a fast-working and a slow-working switching mechanism of a subscriber group takes place at the same time as a line of the group is called (via St, 118 ", iiga and St, Zoo) . 1d .. Circuit arrangement according to claims i and 12, characterized in that the contact field of the rapidly operating switching mechanisms is divided into several contact rows or sets of contact rows, while the contact field of the slow operating switching mechanism has only one set of irontact rows Claim i, characterized in that the rapidly operating switching mechanism is caused by an electromagnet (259) which is arranged on the first selector (GW) and is influenced by the setting and reversing circuit, to be caused by the selector ( GTI, ') 16. Circuit arrangement according to Claims i and 15, characterized in that d he solenoid (259) causing the disconnection is switched on during the polling current surge transmission in series with the line relay (LRI) of a selector (LW) used after the first selector (GW) :. 17. Circuit arrangement according to claim i, characterized in that each line of a subscriber group is assigned an isolating relay (co) which is excited first by a current path leading through a fast switching mechanism and later by a circuit leading through a slow switching mechanism. 18. Circuit arrangement according to claim i, characterized in that a circuit (2i9, 202, 208, 220, df, df #i "wd 5, d) "contains a relay (22o) which controls the circuit of the moving magnet (214) of the slow-operating switching mechanism (LF). 19. A circuit according to claim i and 18, characterized in that the circuit of the moving magnet (214) is interrupted by a second relay (239), 'which in series with the isolating relay (co) of the calling line. 2o. Circuit arrangement according to Claims 1 and 8, characterized in that the connector seeker is started and stopped by a relay (262) which is fully excited by a selector (GW) used for a voice connection (by closing 249). 2i. Circuit arrangement according to Claims 1, 8 and 2o, characterized in that the excitation of the connector seeker relay (262) takes place at the moment of the delivery of a reversing current surge. 22. Circuit arrangement according to claim 1, 8 and 2o, characterized in that the excitation of the connector seeker relay (262) 'happens at the moment of a premature termination of a connection (by closing 261). 23. A circuit according to claim i and 12, characterized in that in each slow-working switching, a switching relay (28o) is present, which is only caused when the fast-working switching mechanism is released, the connection between the calling line and to establish the voters (GW). 24. Circuit arrangement according to claim i, characterized in that for each group of subscribers a plurality of line-identifying switching elements (F., 202a, 302b, Fig. 12) which pass calls simultaneously to the connecting elements (LF) are arranged, which with special devices ( z. B. resistors Xd, Xb, y., y "and relays 220b, 3aoa) cooperate in such a way that the connecting elements only connect the current impulse receivers assigned to them to those lines through whose call they were stimulated by means of the switching elements according to claims i and 7, characterized in that, in order to avoid cross connections, the test circuit for influencing the setting of the connecting element (LF) determining relay (e.g. 220b, Fig. 12) via contacts in all switching mechanisms (e.g. BF, 202a, LF ", Fig.12), which participate in the adjustment of the connecting member.