DE693396C - Arrangement for issuing an alarm - Google Patents

Description

Arrangement for issuing an alarm The invention relates to an improvement the arrangement known per se for issuing an alarm to a plurality of participants from one Central from and consists in that one or more subscriber exchanges to the central @ are connected, their alarm transmitters according to the selection of the subscriber group to be alarmed from the central office this group in the one identified by the central office Alert wise.

This inventive training has the advantage that in the simplest Way subscribers connected to local exchanges in groups Can be alarmed extensively and in a variety of ways from a control center in such a way that that neither between the central office and the exchanges a large number of normal Weak current cores still particularly strong lines for a multitude of alarming ones Participants are required. In spite of the fact that it is used, it becomes less, often more already available Weak current wires between the control center and the exchanges a loud one Alerting large groups of participants is possible. To with as little different as possible Lines get along, the device is made so that @ the connection between the command center and the individual switching centers only via a double line going on. To achieve this, the exchange is connected to one of the Command post influencedi receiving device equipped in per se known Way from the control center through various types of current (direct current, alternating current, Current reversals, current amplifications) can be influenced in various ways. Around To get further savings, it is also possible to use it for other purposes To use lines by z. B. by overlay or in the manner of quad telegraphy the command post by the alternating currents superimposed on the telephone currents subordinate direct current surges or the commands of the exchange by means of simultaneous graphics transmitted over lines already used for telephone or other purposes.

It has now been found to be useful to have one in the headquarters Provide means by which it is possible that the set alarm signal is not only sent once to the selected participants, but multiple times, and that the termination of the alarm transmission only takes place when the alarm signal as often as desired has been sent to the participants or if by pressing a special key it is indicated that another Alarm transmission is not desired. This latter can e.g. B. occur when The alarm was initially set to be sent out four times in the command center has been and if by any special occurrences during the second Transmission the transmission of a new, modified alarm is desired. However, since a reset of the system only after the fourth transmission of the alarm ahead of you would go, would have to be proportionate to the setting of the new alarm to be sent have to be waited for a very long time, which is particularly disadvantageous when the new alarm is particularly important. For this reason, according to the invention by hand To be operated switching means provided that the repeated transmission of the set Interrupt the alarm, however, precautions are taken to ensure that the interruption transmission only in the pauses between the individual alarm transmissions can go on, so that in any case the sending of a garbled alarm is avoided. In the above embodiment, when this is operated according to the invention Switching means during the second transmission of the alarm to reset the system immediately after the second transmission of the previously set alarm has been completed and the system for setting the new alarm is released.

As stated above, it is advantageous in most cases to have the To automatically return the system to the rest position after the alarm has been sent, so that then the participants who have received the desired alarm after Issuing the alarm must be separated from the command parts again. In special cases, but especially if there is a telephone connection between the command post and the subscriber to be alerted is desired, it is expedient for this to coincide the connection between the command post and the participants after the To prevent alarms, otherwise the desired ones from the command post again Subscribers would have to be dialed in order to establish the telephone connection. These Re-election of the previously chosen participants represents an unnecessary loss of time represents, which is avoided according to the further invention in that devices provided that when choosing an alarm, the desire for an afterthought telephonic communication identifies, be actuated and, appropriately, the resetting the system only after pressing a special key or automatically after termination release the telephone conversation. Instead of actuating the. Provision of the facility preventing facilities when selecting a particular alarm is it Of course, it is also possible to select one or more of the facilities To operate groups of participants, especially if individual participants do not Have telephone traffic.

The switching devices in the command post are now in order to avoid operating errors to avoid being so interconnected that inevitably the order of operation of the individual switching devices in a certain order is if the transmission of an alarm is to be achieved at all. First of all you have to hence the office or offices attached to the command post in the command post Be selected before selecting those affiliated to the selected offices Participants can go on. After selecting the desired participant, only then appropriately the selection of the alarm to be sent to these participants is released, and after the selection of the alarm has been completed, the alarm can only be sent will. So it is with such an arrangement of the individual switching devices made it impossible for anyone to operate the alarm system in the command post Forgets to set a new alarm and that of the previous alarm broadcast resends the set alarm to the newly selected group. Likewise is the Operator forced to select any new alarm state when selecting a new alarm to mark, to select the subscriber to be alerted again, so that it does not it is possible to accidentally send a new alarm to the previously alarmed subscriber to send out if one assumes, what one is entitled to do, that there are errors in the operation the selection of participants are almost completely excluded.

For subscribers who are in the idle state of the system to a telephone exchange connected, it is now expedient and it has been suggested before Sending the alarm to these participants is an expediently slowly reinforcing one Send an alarm to indicate to the telephoner that an alarm has been sent and he should hang up the phone. This is necessary for a sudden onset of the alarm at full volume, otherwise damage can easily be avoided those who are telephoning at the time of the alarm can enter. The pre-alarm will now selected in the same way for all different types of alarms to be sent out, there he is only supposed to serve; display the upcoming alarm. It is therefore unnecessary start the pre-alarm with a special signal from the command post, instead, a device is provided that is expedient in the exchange is present and which automatically always has the same type before each alarm is sent Sends pre-alarm to the selected participants. It is advantageous here both the same generator to send the pre-alarm and the actual alarm to use, so that there is a particularly expedient version in the alarm generator is provided in the exchange, the one before transmission of the actual alarm, all participants are always the same Sends out an alarm and then from the command post, controlled by impulses, sends out the actual alarm at full strength. An unnecessary increase in price to avoid the entire system, it is useful here after triggering the Alarm generator for the command center, through which the switching center initially to Sending the pre-alarm is caused to set a delay device in motion set, 'through which the transmission of the main alarm in the exchange controls Impulse from the command post is delayed until the pre-alarm is safe has been sent to the participants. It is, however, also possible, a facility to be provided in the exchange through which a pulse from the exchange o. the like .. is sent to the command post, which terminates the pre-alarm there indicates.

In FIGS. I to 7, an embodiment of the invention specified above is described, from which the further details emerge more clearly. Fig. I initially shows the arrangement of the entire system in a purely schematic manner. KSt identifies the command center from which both a selection of the various exchanges connected to the command center in a star shape by the switch S and a selection, in particular a group selection, of the the selected exchange, e.g. B. V St, connected 'subscriber T can be made. To select the exchanges, as shown schematically in FIG. the selection of the desired subscribers connected to the selected exchange is done by the group selection devices labeled Gr and by the lamp field LGr, which indicated to the person making the selection whether he has selected the desired subscriber. The pulses flowing when the group number disc NGr via the line L is actuated in the exchange VSt, in a manner known per se, the selection device AE, which by means of its rotary dial D the relays to be selected, eg. B. R1 or R, energized. By energizing the relay R1 z. B. the contact ri in the exchange VSt is closed and thereby the subscriber T is connected to the exchange VSt.

In Fig. I is now shown schematically by the dashed line, that the subscriber T when energizing the relay R1 not directly to the exchange VSt, but via a further exchange VSt, to the first exchange VSt, can be connected. The number. the one with the command post via the Line L to be connected subscriber can thereby be enlarged as desired.

Once the subscribers to be alarmed have been selected, which are represented by the individual subscriber T in the exemplary embodiment in FIG. Ui. As a result, the number transmitter ZG is connected to the dial NTG with the line L in the command center, and on the other hand, the alarm device AL with the alarm device ALG can be sent via the line L from the number transmitter ZG in the command center KSt in the exchange VSt Pulses can be controlled in the desired manner. To control the alarm selected by the operator in the command center, a lamp field LZG is also provided next to the numeric transmitter, as in the case of the selection device, so that the operator can recognize which alarm he has selected. To. Pressing the start button At in the command center, the alarm device in the exchange VSt is started, which, for. B. from a local AC power source, e.g. B. a motor generator, fed, first sends the pre-alarm to the subscribers T via the transformer Tr and the contact r1. After this time, during which the numerator is prevented from sending out the set alarm signals, the numerator begins sending the alarm pulses through which the alarm device AL is controlled in the exchange VSt, which is now at full strength in the cycle of Encoder pulses send the alarm to participants T via the transformer Tr. If the alarm is transmitted to subscriber T as often as desired, then the switching device collapses in a manner not shown in FIG.

It is now assumed that the command post KS't intends to speak to the subscriber T. After renewed selection of the connecting line L leading to the exchange hStl by means of the switch S, a new group selection takes place by the group selector Gr in the command center, through which the selection pulses reach the selection device AE via the switch U, S, L, U1. The lever knob D is set and reaches the contact corresponding to relay R2, which responds and actuates its contacts r21. The switches U and U1 in the command center and the exchange then flip. After setting the. Numeric transmitter ZG and after pressing the start button AT in the command center, the advance signal is now automatically sent first by the exchange VST1 to subscriber T and then the signal sent by the numerator ZG through pulses from the command center to the exchange L'Stl. By setting the numerator ZG or .in any other suitable manner, z. B. by selecting the relay R2, it can now be ensured that when those alarms are sent out that are intended to indicate that a conversation is desired, the connection established after the alarm has been sent does not collapse - as in the case described above. By pressing the button Tt after the alarm has been sent, the telephone set F is switched to the line by means of the relay T 'through its contact t in the command center and, at the same time, in the switching center VStl Connection of the command post with the subscriber T established. After the call has ended, the system can then be returned to the rest position in any suitable manner from the command post by pressing a reset button which, if necessary, can still be activated automatically by hanging up the telephone.

FIGS. 2 to 7 now show a more detailed circuit diagram of a circuit according to the invention Annex .dar, from which .the further details of the inventive concept are taken can be.

A. Selection process in the command post Fig. 2 shows .the selection device provided for the selection of the desired subscriber groups in the command post KSt, which was designated in Fig. I with GR . Should in one of the connected exchanges, z. B. VStl, a certain group of subscribers are alerted, first the switch S1 belonging to this exchange is operated, through which the line L, which was previously under closed-circuit control, is switched on to the selection device provided with the relays A and B. This selection device is in a multiple circuit on the individual switches S, which are used to connect the lines L leading to the various exchanges to the selection device. When the dial used for selection is opened, the Kontaktrtsal is first closed, which closes the circuit for the relays A connected in series in the command post and the receiving relay IU (see Fig. 5) in the exchange V St : +, nsal, nsil, A , S1, a-wire of line L, receiving relay IU in the exchange, b-wire of line L, S1, c2, -. By means of its contact a1, the relay A switches on the delayed relay B, which is held during the selection pulse series given by the contact nsil when the dial expires, while the relay A works according to these pulses. The pulses of relay A are transmitted to the rotary magnet DR1 via a normally open contact b1 of relay B by means of its contact a2 and a cli contact, which is set according to the selected digit. After the end of the first series of pulses, relay B also drops out and, via the now set rotary arm dr, of selector Dr, activates relay Cl by means of its contact b2, which is held by its own contact c12. The contact c, this relay now switches the contact a2 of the pulse relay A via the contact c21 of the relay C2 to the rotary magnet of the second rotary selector Dr2, so that the following series of pulses is used to set this selector. If this second series of impulses is also over, relay B falls again, so that now over the arm dr21 of the voter Dr. and contact b3 of relay B can address relay C2, which is holding current via its own contact c_2. By setting the rotary selector Drl and Dr, and by responding to the relays Cl and C2, the lamp field LGr (see also Fig. R) was also switched on, namely via the contact c13 of the relay Cl and: the rotary arm drls -the rotary selector Drl the tens lamp and via the contact c23 of the relay C2 and .the rotary arm dr23 of the rotary selector Dr, the single lamp in the control panel is switched on. The relay C2 also disconnects the rotary selector Dr2 from the pulse contact a2 through the contact c22 and finally disconnects the connection line L from the voltage by opening its normally closed contact c24.

The two series of impulses used to set the rotary selector Drl and Dr2 in the command post simultaneously control the pulse relay IU via the connecting line L in the switching center VStl connected by means of switch S1, which, as will be described later, sets the rotary selector used for selection. B. Broken wire control As already stated above, the connection lines L are in the idle state of the system, ie when the switch S is open. Each connection line is assigned such a wire break relay to which the connection line is connected when it is disconnected from the selection device, that is, when the associated switch S is in the rest position. The quiescent current flowing on the line runs from + via switch S1, break contact ta of the telephone switch, d-wire of the line L, receiving relay in the exchange, b-wire of the line L, break contact tb of the telephone switch, switch S 1, wire break relay Dl, - . If the quiescent current on the line L is interrupted by a wire break or a ground fault, the wire break relay Dl drops out and thus brings its contact dl into the position shown, whereby the wire break lamp Drll, which indicates the wire break on the connecting line assigned to the wire break relay Dl, lights up: +, Fault relay St, dl, wire break switch drsl, contact Sll of switch S1, Drll, -. The fault relay St common to all wire break lamps Drl responds and appropriately generates a fault alarm which indicates that there is a wire break on any of the lines going out from the command post. By turning the wire break switch dysl, the wire break lamp Drh is made to go out. C. Display of the selected line When the selection switch S is actuated, the associated wire break lamp circuit is switched over in such a way that a flickering symbol of the wire break lamp indicates that the associated connection line has been selected. When the switch S1 is actuated, the contacts S11 and S12 are switched over at the same time, so that a circuit from + via S11, resistor W1, DYll, - is established for the wire break lamp. As a result of the circuit resistor W1, the lamp Drll initially burns dark. The contact S12 connects the relay interrupter RU, RU, with the contacts rii ", rit51 to voltage, the work of which is shown in FIG. 2. The contact ru, of the relay RU, in the relay interrupter RU, RU5 now closes at regular intervals Resistance W1 in the circuit of the wire break lamp Drll short, so that this lamp alternately burns brighter and darker.The flickering symbol indicates that the line L belonging to the lamp is connected to the selection device.

D. Alarm selection process in the command center The - selection of the desired alarm will now be described. The processes in the command post are shown in FIG. 3. As emphasized in the introduction, the circuit is made in such a way that the selection of the desired alarm is made dependent on the selection of the desired subscriber groups, just like the selection. of the subscriber groups was dependent on the actuation of at least one of the switches S. If no switch S was actuated, then opening the dial for the selection of the subscribers to be alarmed was ineffective, since the circuit for relay A in FIG Applying the desired line to the selection device by a switch S is closed. The opening and closing of the dial remained ineffective if no switch S was operated. Correspondingly, for the selection of the desired alarm, care is taken to ensure that the actuation of the dial provided for this purpose remains ineffective if the group selection is not terminated beforehand. The criterion for ending the group selection was, as can be seen from the above, the response of the relay C2. In addition to the contacts shown in FIG. 2, this relay also has the further working contact c25, which is in series with the dial contacts etsa, and 21s22 of the dial for alarm selection, so that the alarm selection can only take place when relay C2 is addressed. While now when selecting the desired group of participants from the command center via the connection line to the exchange, impulses had to be transmitted that were used in the exchange to set the rotary dial, in the present embodiment the alarm device is made so that the alarm selection process is unique and plays alone in the command post; only when the alarm is given to the subscriber is the previously set alarm transmitted from the command center to the exchange, which then appropriately transmits the alarm currents to the subscriber at the rate of the alarm impulses given by the command center. Used to set the desired alarm in the command post. The designated in Fig z with ZG number generator which essentially consists of three Einstellwählern, W1, W2, Ws, by which are in the hundreds, tens and units of the alarm, and a Abgreifwähler W4 who the. The setting selector scans and thus forwards the control pulses to the exchange.

The numeric encoder is set by dialing the desired alarm numbers. When pulling up the dial with the contacts nsa2 and nsi, the relays A2 and B2 respond: -f-, c25, ztsa2,, B2, -. While B2 holds: - @ -, c25, ztsa2, B2, -,! 12 passes on the impulses to the rotary magnet W1 of the first selector. If the series of pulses has ended and B2 has come to a fall with a delay, relay C speaks via arm T'V 1d of selected selector W1 and gives itself a holding current via its contact c1:. +, C1, W1d, C, - This Relay C switches the pulse contact a once from the voter magnet W1 to the voter magnet W2 by means of its contact c2 and also brings the corresponding hundred-light lamp to light up through its contact c4 in the control panel via the voter arm Wlu .des voter W1. The second series of pulses now controls the selector W2 through the pulse contact a: +, normally open contact b21, normally open contact c2, normally closed contact d321 W2, -, while the third series of pulses after the relay D3 has responded: -f-, normally closed contact b22, selector arm W2d. Of the selector W2, D3, - acts on the rotary magnet of the third selector W3: --f-, b21, a, C2, d32, C2, Wg, -. hAfter the third series of pulses, relay E responds: -E-, normally closed contact b21. Selector arm W3 ″, E, -, which disconnects the rotary magnet of the third selector TV, and switches on the single lamp in the control panel. Since the relays C, D3, E are addressed and held by the contacts cl, t131, e1 , all three lamps are now of the panel is switched on, from which the operator can see whether he has set the correct alarm number. E. Triggering the set alarm If the operator is satisfied that the numeric encoder has been set correctly, he switches the alarm by pressing the trigger button ET (Fig. q .) By pressing the AT button, provided that the relay E is energized by dialing the third alarm digit and thus the contact e5 of relay E (Fig. 3) has been closed, the relay An is made to respond: +, E5, AT, Atz, -, which is connected to a holding circuit via its contact: +, rü21, an1, Ara, -. The relay An switches on the relay interrupter consisting of the relay VK to VK, which gradually switches the selector W8 mitt els of the contact vksl advances. When the relayAn responds, the relay VK, is first excited: -, an, 11, hKl, _, pre-circuit resistance vkl, -f-. This relay opens its contact vkli and thus -the short circuit for the relay VK ,, which can now also respond and by opening its contact vk21 cancels the short circuit for the winding I of the relay VK. When the relay VKs responds, on the one hand the selector magnet Thg receives current through the normally open contact vksi, and on the other hand the relay VK, is short-circuited through the contact vk ", which now drops out and, through its normally closed contact vkl1, the relay VK., Short-circuits. Relay. VK, drops now also from and short-circuits the winding I of the relay VK, so that by opening the contact vksl the selector magnet W $ is again de-energized and by opening the contact vks, the relay VK, receives power again. This process is repeated, until the voltage from the relay interrupter is switched off by opening the contact 11. This is done in the following way: The arms W ", Web, Ws, of the selector W8 are incrementally advanced by .the current pulses from the selector magnet Ws. The voter now brings the delay relay IH on his second step via his arm TVea and Kontakt.an2 via his arm TVea and Kontakt.an2, which, through its contact ih, is placed in a holding circuit: +, Yü2i, ihl, IH, - and through Opening of its normally closed contacts ih " ih", which when the relay Aa responds via the contacts art.s, an4 of this relay (see Fig. 2) again disconnects the voltage applied to the connecting line. On the eleventh step of the selector W8, @ the relay U2 is activated in the first stage: +, yü21, Wea, resistance Ui, relay U2, -. The relay U2 closes its contact u, ', whereby the excitation of the relay U2 in the second stage is prepared by the short circuit of the resistor U1. The voter W8 now begins the second round. Here comes the tenth step via the b-arm of the selector W8, the relay U2 in the second stage to respond, because the previously existing series resistor Ui is short-circuited, and the relay switches the c = arm of the selector by closing its contact u2 " W8 on, but is held again via the resistor U, the resistor Ui must therefore be dimensioned in such a way that the current flowing in the circuit yügl, u2, or contact I i of the selector arm Wea, Ui, U2, - the relay U2 also holds in the second stage, but can only excite it in the first stage. During the third cycle of the selector W8, as indicated in the exemplary embodiment, the relay L comes to the fourth step to 'respond: @ -, rüM, U2'. u2 ', W8C, L, -, which is in a holding circuit: -f-, yii21, l2, L, -, and, as already said above,. stops the relay breaker by opening its normally closed contact h As already mentioned above, dialer W8 was started by the Ans The relays On and IH are briefly energized to the connection line after the switched on. Exchange hSt. And - in this the relay RU (see Fig. 5) to respond, 'which, as will be described later, causes the connection of the paging machine and the activation of the pre-alarm in the exchange. During the further rotation of the selector W8, the generator set up in the exchange then sends the pre-alarm currents to the selected subscribers automatically, ie without any special processes being sent from the command center to the exchange. The use of the dialer W8, which rotates three times in the command center, only serves to give the exchange the time to send the pre-alarm correctly and completely, while the actual alarm, determined by the setting of the encoder, is from the exchange. may only be sent depending on the: impulses transmitted by the command center to the switching centers. This is done in the following way: G. Transmission @, of the main alarm If the relay L at the command post comes into contact with the fourth contact when the selector arm W8 contacts the fourth contact during the third cycle of the selector W8, then the relay from the relays F, G, 11, and K (Fig. 3) existing relay interrupter in the command post switched on: +, normally closed contacts z2 and x1, normally open contact 12 of relay L; Normally open contact ei of relay E, relay breaker, -, which: advances the rotary magnet of alligator selector W4: -f-, contact f2 of relay breaker, phi, p4, W4, -. The mode of operation of the relay interrupter is clearly evident from FIG. 3 and does not need to be specifically described. Instead of the relay interrupter, any other pulse generator can of course be used, which is started as a function of the contacts z2, x1, 12, ei and, by means of the contact operated by it, corresponds to the contact f2 (FIG. 3). Way controls the selector W4. Parallel to the rotary magnet TV4 is the pulse relay I, whose contacts i1, i2 (Fig. Z) send the pulses from the encoder to the connecting line L and thereby the control relay RU (see Fig. 5) in the switching center VSt connected by the switch S steer. If arm Wob of selector W4 has reached the fourth step through the relay interrupter, on which arm b of selector W1 is also located, test relay P is activated: +, 913, Wlb, Wob, f3, p3, P, - , which brings the auxiliary relay PH through its contact p1: +, p1, PH, -, and is also placed in a holding circuit dependent on the selector W4 via its contacts p2 and p3: -f-, arm W4d of the selector r'V4, p2, p3, P, -. By responding to the relay PH, which is maintained through its contact ph3: -, PH, ph3, x3, +, the impulse transmission to the exchange is interrupted on the one hand by disconnecting: the relay J, because the idle contact phi is opened, and on the other hand through Switching the contact p4 of the relay P of the selector 974 to the contact yu21 of a relay interrupter consisting of the relays RU and RU, which now rotates the selector W4 at an accelerated pace to the zero position. The operation of the relay circuit breaker consisting of the relays RU 1 and RU 1 is shown in the figure, and the pulse speed can be appropriately measured without difficulty. As already mentioned, it is only necessary to ensure that the pulse speed of the relay interrupter RUI, RU, is greater than that of the relay interrupter F, G, H3, I (. Of course, it is also possible in place of: the relay interrupter RUI, RU2 Use another breaker, which is set to the same pulse speed. By switching the contact p4 , the relay RUI is connected in series with the selector magnet W4: -j-, RU, p41 W41 -.- Relay RU, responds, the Contact rui of relay RU is closed. Relay RU2 responds and closes relay RU briefly through its contact ru.Furthermore, the selector magnet TV,: -1-, RUI, p41, which is at rest with relay RU, speaks W4, - in the event of a short circuit in the relay RU, through the contact ru, and thus advances by one step.This process is repeated in the cycle of the pulses of the relay interrupter RUI, RU2, until the selector W4 has reached its zero position. In this position is de r Holding circuit -y-, W4d, p21 p9, P, - for relay P interrupted. The relay P drops out and, through its contact p4, switches off the selector magnet 1h4 from the relay interrupter RU, RU. The circuit for the relay RU, this breaker is also interrupted by the dropping out of relay P, so that now the relays RU and RU2 are de-energized.

When the scanning selector 1,1 "4 is returned to the zero position, the relay GI is made to respond in the eleventh step of the selector W4: -f-, selector arms W4, and W4Q; gll, 1a24, GI, -, which is via - f-, a'ii24, 9117 h21 GI, - are holding current and by means of its contact, the connection of the relay HI 9i2 prepared the relay GI further separates by its contact b 9i3 the arm of the selector from WI by the response of the relay PH.. and closing of the working contact plag, the selector WB was also switched to the contact f2 of the relay interrupter F, G, H3, K, which slowly advances the selector Wa step by step. In the second step of this selector, the relay X is energized via the arm LTTad: -f-, y1, W "" X, -, which separates the relay breaker F, G, Hs, K by opening its contact x, and the selector W, by means of its contact x2, to the two relays RU and RU2 Existing quick breaker sets: +, RUI, x21 WEd, Ws, -. This switches the selector in Schn ellem pace to the zero position. If this is reached, the holding circuit for the relay PH: -, PH, ph3, way, + opens, and the relay X drops out with a delay, so that a repeated response of the relay PH via the parallel to the c-arm of the selector W8 lying break contact x3 of the relay X is avoided. By closing the contact plai of the relay PH , the pulse relay T and the selector W4 are again connected to the contact f2 of the relay breaker F, G, H31 K g esc ', which by closing the normally closed contact x, the relay X is also back on was placed, .so that it begins to work and slowly advances the selector 1174, while at the same time the pulse relay I applies voltage to the selected line L through its contacts i, and i2 current impulses, at the rate of the incremental pulses of the selector W4. The arm W4b of the selector W4 now picks up the position of the b-arm of the selector IT'2 until the relay .P is activated again when the corresponding position is reached: -E-, g sharp, his, TTr-b, Wob, f31 PS, P, - This brings the relay again PH: +, pi, PH, -, whereby, as described, the selector W4 is brought into the zero position by means of the relay interrupter RU1, RU. With his arm W4, however, this time the selector W4 already causes the relay HI to respond at the tenth step: +, W4d, TV4a, 912, HI, -, which is held via +, rii24, 1a11, 9121 H11- and by closing of its normally open contact h12 prepared the response of the relay H2. The relay r31 also separates the b-arm of the selector W2 by flipping its contact Isis and applies voltage to the b-arm of the selector W3, so that the setting of the selector W3 is scanned during the third cycle of the tap selector W4. By responding to PH , as previously described, the selector bhQ was initially connected to the relay interrupter F, G, H3, K and, after the relay X responded, to the rapid interrupter RUI, RU2, which in the meantime has already brought the selector W4 to the zero position Has. Since during the rotation of the selector W, the relay J is also switched off by the contact phi of the relay PH and thus there are no current impulses on the line L, and since the selector TT'r, when it reaches its zero position, the relays PH and X fall brings, which on the one hand turn on the relay J again to the breaker contact f2 and on the other hand delay the breaker F, G, H31 IL back on, the pause between two pulse series is essentially made up of the cycle time of the selector W "and the release time of the relay X together, is therefore independent of the position of the selector 11, '4 in which it brings the relay P, so also independent of the alarm signal set.

With the third cycle of the selector W4, this now brings the relay H2: -f-, W4a, ZV4a, L12> H21 - to the first step, which closes its holding circuit by closing the contact: - @ -, .r31 121, H21 - Furthermore, the contacts 1a22 and 1a23 are closed by the relay H2, so that the selector WS is switched forward by one step: +, h22, W5, - and the response of the relay Y: +, h2s, Wsb, Y, - is prepared . By opening the normally closed contact h24, the relay G1 is finally made dependent on the contact ph4 of the relay PH and thus the release of the relay G1 is prepared. When the d-arm of the selector W4 runs into the position corresponding to the position of the selector arm W3b speak, again the relay P: +, g sharp, h132 Wsb, W4ti, fs, ps, P and the relay PH: +, p1, PH, - on, so that the selector W4 and the pulse relay I of the normally open contact f2 of the relay breaker F, G, H32 K are switched off again by the contact phi. The selector W4 is switched to the relay interrupter RU, RU2 through the contact p4, which brings it into the zero position. Furthermore, through the contact ph of the relay PH, the selector YVO is switched to the interrupter contact f2. However, relay Y now responds to the first step of this selector via the b-arm of selector W6 and, by opening: its contact y1, opens the circuit for relay X. This has the effect that -the selector W, not as in the two previous cases by the fast-working interrupter RU1, RU2, but continues to be incremented by the slow-working interrupter F, G, H32 K, provided that the interrupter is on Tension remains. However, this is only the case if the system does not return to the rest position after the first signal has been sent, since the alarm signal is to be sent several times. Only in this case there is a pause between two alarm signals: which is extended according to the contact times of the slow-working breaker. On the tenth step of the selector W5, however, Y falls again, closes its contact y, and thereby causes relay X to respond. The selector W6 is now brought into the zero position by the rapid interrupter RUi, RU.

H, resetting of the numeric transmitter (Fig. 3 and 4) in the command post As already mentioned above, when the relay HZ responded, the selector W5 was advanced by one step. This brought the a-arm of selector W5 to the first contact, and if the arm of alarm switch AS that determines the number of alarms to be sent is also set to the first contact, relay UH is energized by contact y2 when relay Y is energized : +, W5 "2 AS, z1, y22 ROH, .-. The relay REIH responds and excited by closing its contact stir the relay RU2, which responds and is addressed via its contact rü22 and the selector arms c of the selector Wi to W5 The excitation of the relay RU brings the entire alarm system back into the zero position with it. The contact rii "switches off the control panel of the numeric transmitter, so that the lamps go out. The contact yfi24 also opens the holding circuit for the relays Gi and H1, while the relays P and PH remain held until the selector W4 is returned to the zero position. Through the normally open contact rü25 of the relay RCI2, the dialing magnets W1, W22, W3 and W5 are brought into the zero position one after the other. Since the relay C is energized, first receives the selector W, current: +, ru2, M25, c32 W1, -, and the selector WI is brought into the zero position by the contact r262 of the rapid breaker RUi, RU, in which through the voter arm d of the selector W1, the circuit of the relay C is interrupted and the contact c3 returns to the rest position, whereby now the selector WZ on the way +, ru2, rii ", c3, d.3, Ws, - receives current Interrupter contact ru2 also switches the selector WZ to the zero position, so that the relay D3 drops out and the contact d33 switches the selector Ws on to the relay breaker contact ru2, which is also brought back to the zero position and, when the relay E drops out, the selector W5 to the relay breaker contact ru2 sets. Simultaneously with the Back Brin narrowing of voters W1 to W3 and W5 took place the provision of the voter W4 RÜG by the relay break contact because the voters W 4 through the contact p4 of the relay P yet held with the co ntakt ritt is connected. When the selector W4 reaches the zero position, the relay P drops out, since its closed circuit is interrupted via the d-arm of the selector W4. Now the voters WI to W5 of the numerator (Fig. 3) are brought back to the rest position. Furthermore, by opening the normally closed contact rü, (Fig. 4) the starting relay An was switched off and the relay VK, II was connected to voltage: +, d, VK3II, d-Arm .des selector W8, normally closed contact on, -. The relay hK, II responds and closes its contact vk31, 'so that the selector magnet W receives power and opens its contact d. As a result, the relay VKsII is again de-energized and opens its contact vk ", whereby the selector W8 is de-energized. This continues until the selector WB has returned to the zero position and thereby the d-arm of the selector Ws the circuit for the relay VK , II. By opening the contact 7ü21 the holding circuits for the relays JH, V2 and L are also opened, so that they return to their rest position. The relay JH therefore closes its contacts iltz and ihs (Fig. 2), however delayed, so that the contacts at, and an4 of the relay Ait are already open and thus no current pulse can be sent to the line L. The control lamp, which is also provided for checking the status of the starting relay, goes out at the same time as the relay An drops out of the relay V2 remained ineffective. However, when the relay L switched off through its contact 1, the relay interrupter F, G, H3, K of the voltage was switched off. As a result, the selector W6 was not m It is switched on because on the one hand the breaker contact f2 is no longer working, on the other hand the contacts x2 and 1 are open. Only when the selector W3 reaches its zero position, relay E drops out and connects through its contact e2 the selector W6 with the contact rat, the quick breaker RUl, R U2, so. that now the selector W6 returns to the rest position, which brings the relay Y to fall in its tenth position. The relay X is energized: +, y, W6 "", X, - and drops out with a delay when the selector Ws reaches the zero position, so that the holding circuits for: dieRelaisPH: -, Plt, pltsl, x3 or W6 , + and H2, -, H2, 1t21, x3 or Ws "+ are opened briefly and these relays drop out. I. Resetting of the group selector (Fig. 2) in the command center In addition to resetting the numeric encoder, the group selector is also reset causes the relay RÜ2 to respond by actuating its normally open contact 7i% 26, the relay RU, the group selection device: +, selector arms d714 or d724 the rotary selector Drl, rit26, RÜl, -. The relay RU, with its contact riils into one of ri # .6 -independent- holding circuit. The control lamp lying parallel to the relay RÜl lights up and indicates that the group selection device is reset to the zero position. The relay RÜl first opens the circuit for the lamp field by means of its contact rii, l LGr of the group dialing device so that the units and tens lamps go out. Furthermore, by closing the contact rii ", an interrupter U is switched to the rotary magnet Drl: - [-, U, rii12, cl, Drl, -, which switches to the rotary selector Dr2 after the rotary selector Drl is reset and the relay Cl drops out becomes: +, rii12, cl, c2, D72. When the selector Dr2 reaches the zero position, the relay C .. also drops out and opens its contact c2, so that now the breaker is again switched off from the system after the selector in At the same time, the relay RU, drops out, and its control lamp goes out because the rotary arms d714 and d724 of the selectors DRl and DR2 have interrupted the holding circuit for the relay RÜl. During the resetting of the group selector, the relay RÜl through its contacts rii14 and rill, a current pulse of opposite polarity is applied to the line L, which also causes the reset in the receiver in a manner described later See alarm signal As stated above, these reset processes only take place as soon as the rotary arm W5 "of the selector yVr is brought into line with the rotary arm of the alarm switch AS (Fig. 3). This is done by the response of the relays H2 and Y and has the effect that, when the rotary arm AS is set to the first contact, the desired alarm is only sent once. If, however, the rotary arm of the alarm switch z. B. set to the fourth contact, then after the first stepping of the selector W5 the relay RüH could not respond via the arm YTTra. With the above-described excitation of the relay PH after the first transmission of the alarm, the slowly operating relay interrupter F, G, H3, K would initially not be switched off, as the relay Y was activated and, through its contact y1, the relay would respond X urid thereby the disconnection of the breaker by the contact x, the relay X prevented. So while the selector W6 when the relay PH is energized after the transmission of the signal pulse series, however, from the transmission of a complete alarm signal only up to the second position of the slowly working interrupter, after that, however, the rapid interrupter RUl, RU, is brought into the rest position After sending out the entire desired alarm signal, consisting of several series of pulses, it is only brought into the zero position after the tenth position has been reached by the rapid interrupter. This is done in that the excitation of the relay X is suppressed by the relay Y until the tenth position is reached, and thus the selector Wa is advanced to the tenth position by the slow-acting breaker. 7 shows a diagram of such an alarm symbol. The first series of alarm pulses I is ended at time t. At this time, the relays P and PH respond . Now the selector W, takes two slow steps z and 2, since he advances these two steps through the contact f2 of the slow interrupter. This is followed by steps 3 to 12 under the influence of the quick breaker RV "RV". After the zero position has been reached, the selector W switches off the relay PH , so that now, after the delay time of the relay has elapsed, the second alarm pulse series II is sent out After this series has ended, there is a pause formed in the same way as the previous one, which is now followed by the last series of pulses III of the alarm signal to W3 (see above). If W3 has returned to the zero position, then E. The time from the beginning of the resetting of the selector W1 to W3 until the relay E drops out is denoted by E in FIG the selector W6 advanced by the quick disconnect through steps 2 to 12, when it reaches its zero position switches the relays H2, PH and X, of which the first two fall off immediately len, the latter only after the time x. On the other hand, the selector Wa works differently if a repeated transmission of the alarm signal is desired. At the end of the series of pulses III, the selector W is advanced to the tenth position by the contact f2 of the slow interrupter and only then brought to the zero position by the rapid interrupter, after which the relays H2, PH and X are again set in the manner indicated above fall off. The emission of the pulse series I2 of the new alarm signal then follows the drop of the relay X in the known manner. The transmission of the alarm signal is repeated until the arm LP "of the selector WS is in line with the rotary arm of the alarm switch AS. L. Premature interruption of the alarm transmission As mentioned above, however, the possibility of transmitting the alarm is provided to interrupt prematurely; this happens through the reset contacts Rstl, Rst, The contacts can be operated individually by two separate buttons or together with a single button Rst. The contact Rst2, which is in series with the reset relay RÜ2, is now switched in such a way that it remains inactive if it is closed after pressing the starter button AT, since the contact an3 of the relay An in series with it is then open. The contact Rst can therefore only reset the Numeric transmitter and the group selection device (Fig. 2) cause when the start button AT (Fig. Q.) Is not yet actuated and thus the relay -An is still de-energized to effect the reset if the transmission of the alarm signal has not yet started. After pressing the AT button, however, the starter relay An is held as a function of the contact rü21 of the reset relay RÜ2, and the excitation of the relay RÜ2 therefore remains solely dependent on the relay RÜH. If the repeated transmission of the complete alarm signal is to be interrupted, the relay 0 (Fig. 3) is energized when the reset button is pressed by closing the contact Rstl, which is connected to a holding circuit with its contact o1: +, yüh2, o1, 0, -. Through the contact 02, the relay 0 also prepares the excitation of the relay RÜH, and when relay Y responds after sending a complete alarm signal, the relay RUH is excited regardless of the position of the alarm switch AS, which by means of its contact 'stirs the relay RÜH2 to respond, so that now the above-described resetting operations for the numerator and the group selection device begin. The fact that the excitation of the relay RÜH is made dependent on the excitation of the relay Y, the requirement already mentioned above is met, that the premature interruption of the alarm transmission. - may not lead to a mutilation of the alarm signal.

If, however, the reset is to take place before the numerator is started by actuating the starter button AT; then, as already said above, the relay RÜ2 is energized by actuating the same reset button via the contact rst2: +, .an3, RST2, RÜ2, -, which in turn triggers the reset processes. M. Giving the alarm with the following telephone conversation between the command center and participants' Now wishes z. If, for example, the command center is making a telephone conversation with a specific group of subscribers, then it can indicate this to the desired group by sending an alarm signal specially designed for this purpose. However, it is also possible to limit the number of participants or substations by suitably training the group selection facility. with whom speech communication is possible. In both cases, the dialing process in the command post prepares a switching process that prevents the system from automatically resetting after the alarm signal has been sent once or several times and instead prepares or automatically switches the system on to telephone traffic. In the exemplary embodiment, it is now initially assumed that the number 6, as the hundredth of the alarm signal, is intended to indicate to the subscribers that a telephone call is desired after the alarm has been issued. For this reason, special switching means are provided in the numerator, which are operated when the hundred selector W1 is set and which prevent automatic return of the numerator and the group dialing device immediately after the alarm is given and make this reset dependent on the actuation of a special button. For this purpose, in the lamp panel of the numerator on the sixth contact of the contact bank of the rotary arm W1, of the selector W1, the lamp that characterizes the setting of the selector W1 is connected in parallel with a switching device that consists of the series-connected working contacts 1a24 of the relay H2, p5 des Relays P 'and u, the relay U, the break contact rühg and the relay Z exists. Parallel to this is the relay T which, through its contact t, switches on the relay U to the rotary arm of the alarm switch AS. The alarm is set as described above. The lamps of the panel are connected to voltage via contacts c3, cd .., e3 and indicate the alarm set. It is now initially assumed that the contact u1 is short-circuited. In this case, the set alarm is sent out only once, ie regardless of the position of the alarm switch AS. The relays U and T can then be omitted. The process of the single transmission is as follows: After pressing the start button AT, the transmission of the alarm begins, also in the manner described above, but, as already mentioned, the relay Z transmits the alarm several times and at the same time excites the relay RÜH prevented. At the beginning of the third rotation of the sample selector W4, the relay H2 is energized in the same way as above, which is held by its holding contact h21 and the normally closed contact x3. When H2 responds, normally open contact 1a24 is also closed and the excitation circuit for relay Z is prepared. If now the sampling selector W 4 runs to the position of the selector W3 with simultaneous transmission of the corresponding pulses to the exchange, then the relay P speaks, as described above, and, in addition to its contacts p1 and p4, closes its working contact p5, so that now the Relay Z can respond: +, rii23, c3, WI " Z, riila3, ps, 1a24; -. The relay Z opens the circuits for the relay breakers F, G, H3, K and RUl, RU, with its contacts z2 and z3, All of the selector magnets therefore remain in the set position, since the relay interrupter actuating them is switched off.

At the same time, the armature z was turned over by the relay Z, so that now the relay RÜH is only energized via contact z1 when contact o2 is closed can be, because the contact y2 because of the blocking of the selector W, due to the shutdown of the relay interrupter F, G, H3, K cannot be made to respond.

In the present case it was assumed that after the entire alarm signal has been sent once, the alarm should be prevented from being sent. However, as already mentioned, it is easily possible, also in the present case, to set up the device in such a way that the alarm signal is sent out as often as desired and that the system is only blocked by the relay Z afterwards. This is done through the relays T and U in the following way: By setting the selector W1 to the sixth contact, which is used to send an alarm, through which the participants, at the request of the command center, make a telephone call after the alarm has been issued, are made aware, the relay T, which is parallel to the lamp, is energized. This relay T switches a relay U to the rotary arm of the alarm switch AS by means of its contact t1. If the alarm is now to be sent several times before the start of the telephone conversation, the alarm switch AS is set to the corresponding number. A shutdown of the interrupter by response of the relay Z as well as an automatic energization of the relay RUH before the desired number of alarm transmissions is thus prevented. Only when the rotary arm W5 reaches the position of the rotary arm of the alarm switch after the corresponding number of transmissions of the alarm signal, then the relay U responds:. +, W5 ,, AS, t, U, - and brings the relay through its contact u1 Z to respond, which prevents the numeric encoder from returning to the zero position by opening its contacts z2 and z3. If the alarm transmission is to be interrupted prematurely without causing the established connection to collapse and the system being reset, then only the telephone key Tt, a separate key or a relay V controlled jointly by all the telephone keys Tt assigned to the various lines L needs (see Fig. 2) the contact u1 to be short-circuited. A mutilation of the set alarm signal does not occur here either. The relay V is so high resistance that the relay T only. responds if contact z, 5 is closed when the Tt key is pressed. On the other hand, relay V remains held even when contact z5 is closed, since the with. z5 in series resistor w4 is sufficiently large.

The connection of the command center with the alarmed subscriber is thus maintained, and -by pressing the telephone button Tt (Fig. 2), which is assigned to the selected line L, the telephone relay T, which is also assigned to this line, is energized, which is activated via its own contact Closed circuit holds: -E-, resistor w4, contact z5 of relay Z, T, t, rüh4, -. The telephone relay T uses its two changeover contacts ta and tb to switch the telephone equipment common to all lines to the selected line L with simultaneous activation of the previously short-circuited inductors Dra, Drb into line L. The line is fed by means of the two contacts il, i2 of the relay T, which is kept energized by a further contact z4 of the relay Z. After the telephone call has ended, the reset can now be initiated by pressing the special reset button Rst. The relay O is energized by the contact Rstl, which is held in the manner described above via its own contact o1 and by means of its contact o2 via the folded contact z, the reset relay RUH is energized. This switches on by means of its contact stir the reset relay RU, which now causes the number transmitter and the group selection device to be reset in the manner described above. By opening the contact rühs the relay Z is immediately brought to waste, so that the relay breakers F, G, H3, K and RUI, RU can immediately start working again and cause the resetting of the selected selector.

So far the facility has only been made in such a way that the setting of the one selector WI is sufficient to switch on the device for telephone operation. However, in order not to occupy too large a number of alarms and e.g. B. only at the Setting a single specific alarm could turn the facility on proceed in such a way that the relays T and Z existing in parallel Arrangement of two of the voters W2 and Ws pressed in certain positions Relay contacts of the lamp is connected in parallel. Only if all three voters have theirs have a precisely defined position, the telephone can then be switched on will. If only one of the voters changes position, the order falls immediately together after the alarm was sent.

Instead of preventing the connection from collapsing only by selecting a specific alarm signal, as indicated in the exemplary embodiment, it is also possible in the same way to achieve this by selecting a specific group number (FIG. 2). It is then only necessary that the relay T, Z and the contacts rüh3, p5, h24, u1, v existing device shown in Fig. To be assigned to the sixth contact of the rotary selector DRI or DR2. Only if this number is dialed will the connection collapse after the alarm has been sent out. However, it is z. B. by series connection in the manner indicated above through the contacts controlled via selectors DR and W1 to W3, the entry into effect of the device from the choice z. B. to make only a single group and only a very specific alarm dependent. N. Selection of the subscriber groups in the switching centers The two-wire double line L going out from the command center ends in 'the switching center in a receiving device, which consists of the series connection of two relays, one of which is neutral and the other is polarized. The polarized relay in the receiving device of the exchange is now in the course of the line that it is also when the line is switched from the neutral relay TU to the relays RU and RU, through the contacts dat3 and du, of the dialing pulses from the Command post are sent, is flowed through. Its polarity is chosen so that the dialing pulses and the current impulses controlling the alarm do not cause its armature to be flipped, but that it is only actuated when the polarity of the line current is reversed due to the response of the relay RU Switching device is effected.

As already described above, a desired group of subscribers is selected from the command post after flipping the associated office switch S and pressing the first dial with the contacts nsa and nsi. This is the first time the dial is wound. and thereby the circuit for the consecutively switched pulse relays and the neutral receiving relay JU in the exchange are closed, the relay JU responds and switches on the delay relay AU via its contacts: -j-, iui, AU, -. At the same time the normally closed contact iu is opened. During the expiry of the dial, as described above, the relay J sends the dialing pulses over the line to the exchange. The relay JU follows these impulses of the number disc contact nsi, while the relay AU holds because of its drop-out delay. The contact iu2 now actuates the lifting magnet H of the lifting rotary selector of the dialing device in the exchange according to the number of number pulses received. After the end of the first series of pulses, the relay JU remains de-energized because the circuit is opened by the contact izsa on the dial. This also causes the AU relay to drop out, and via the au contact and the head contact h of the rotary selector, the BU relay closes, which is given by its contact bul and the contact pol of the polarized relay POL holding current: -f-, pol , bui, BU; - and by flipping its contact bv, the pulse contact izc, switches to the rotary magnet D of the rotary dial.

Through the now following second series of pulses, - "while the relays JU and AU work again as previously described, the lever-operated rotary selector is now turned in by exciting the rotary magnet D through the pulse contact izsl according to the selected number: +, au" izi2, bat, of the relay "BU, you, D, -. If the second series of pulses has ended and, in addition to the relay JU , the relay AU has also dropped out, the relay DU responds via the shaft contact zsl of the rotary selector, which is in the same way as the relay BU also gives holding current via the contact pol: +, pol, du "you, -. The relay DU also disconnects the circuit of the rotary magnet D by means of its contact du, and switches the long-distance line L from the receiving relay JU and switching to the other receiving relays RU and RUi through its contacts Kita and du4.

O. circuit, of the subscriber groups Another contact du switches on the selected group relays via the rotary arms a, b, c of the rotary dial. The rotary selector is shown only schematically in FIG. 5. Its rotating arms apply voltage to the group relays connected to the contact strips. The group relays can now be distributed to the contacts of the selector in the most varied of ways. It should be emphasized in particular that a subscriber can advantageously be reached in several positions of the selector by having several relays assigned to him, but belonging to different groups. These subscribers can then be alerted by selecting a group without the subscribers of other groups, to which these alarmed subscribers also belong, having to be alerted as well. In a further group, several relays 28 to 30 are also provided, which are used to switch subscribers connected to a telephone network to the alarm device. Finally, it is advantageous to provide a relay A for collective alarm, which is made to respond by selecting a special group number and z. B. in the manner shown for the relays 28 to 30 by its contact a when energized the relays of all groups turns on.

These subscribers, who are connected to a telephone exchange in the idle state (see FIG. 6 - subscribers z, 2 and x), are switched off from the telephone exchange and on the group alarm line when they are selected by the exchange when the group alarm relay assigned to them is excited AL switched. According to the grouping of the individual participants, the device for switching the participants from the telephone exchange to the alarm line must also be provided so that the participants are switched to the alarm line when all the group relays assigned to them are excited. This is done in the manner shown in FIG. B. the subscriber x can be switched from the central office to the alarm line AL both when the group relay X is excited by switching the contacts x1 and x2 and when the group relay 3o is excited by switching the two contacts 3o. Correspondingly, the subscribers t and 2 belonging to a group (see FIG. 5) can also be switched to the alarm line by energizing the group relays z and a belonging to them as well as by the group relays 28 and 29.

As can be seen from FIG. 6, it is not absolutely necessary to always connect telephone subscribers to the alarm line, but special alarm loops, three of which are shown in the exemplary embodiment, can also be alarmed. In the exemplary embodiment, these partial loops are normally under closed-circuit control, with the closed-circuit current, starting from the positive pole, of battery B, via the galvanometer G, the closed-circuit or open-circuit relay DR, via the series-connected loops and the limiting resistor W. When the group relay 21 to 27 belonging to loops I to VII (see also Fig. 5) is excited, the partial loops are removed from the closed-circuit current loop and connected to the alarm line AL, with the closed-circuit current control for the loops that have not been switched by switching on the equivalent resistors W1 until W7 is maintained.

There are also changeover switches S1 to S; provided through which the loops connected by hand to a common inductor line and thus the one in the loops arranged alarm clock can be excited.

P. Alerting the selected participants. Once the desired group of participants has been selected and the numeric transmitter is set in the command center, voltage is briefly applied to the connecting line L through the contacts of the relay IH in the manner already indicated above after the start button has been pressed in the command center. This causes the control relay RU connected to the connection line L to respond in the exchange VStl after switching the contacts dus, du, - which, through its contact yul, excites the relay PU : +, rul, PU, -. The relay PU maintains its contact pul: -f-, du5, .pul, PU, -. When relay PU responds, relay TA (Fig. 5) is excited: +, pul, TAl, -, which switches on relays TA2 and TJ via its contacts talg and ta ": -f-, talg, TA2, - ; -E-, k21, tal2, TA, -. The alarm machine motor 111 is connected to voltage through the contacts ta21 and ta22 of the relay TA and the alternating current generator serving to generate the alarm current is connected to the alarm bar AL through the contacts ta23 and ta " . Another contact ta13 of the relay TA starts the relay chain consisting of the relay V1 to V3, which, working in a manner known per se and as shown in the drawing, advances the selector WU step by step by means of the contact v31 'of the relay V3 of the relay chain . Relay V1 responds via valley and contact k1, 'which cancels the short circuit for relay V2 by opening its contact v1. By speaking to beis; Relay T12, which cancels the short circuit for relay V3 by opening its contact V2, is energized relay V3, which closes its contact v31, as a result of which the stepping mechanism magnet WU receives a current surge. By contact v32 a short circuit for the relay V1 is produced at the same time and this brought it to waste. In the same way, the relays V2 and V3 'are thrown off again by a short circuit across the contacts v1 and v2 and the selector magnet WU is again de-energized by opening the contact v31. As a result of the drop in relay V3, however, relay T 1 again responds, and the processes described above are repeated, with the selector magnet WU being advanced by one step each time.

In the sixth position of the switching mechanism WU (the first steps are used to start the alarm machine), the step relay R1 is activated in the first stage via its arm WUa: -E-, til, R1, Vorschaltwi, derstand w1, WUa, '- The relay R1 maintains its contact rll regardless of the position of the switching mechanism WU. In the seventh step, the resistor w1 is short-circuited via the selector armWUa, and the relay R1 responds in the second stage. Correspondingly, the relay R1 in the eighth position of the switching mechanism WU is activated by the relay R2 in the first stage: + til, Y12, R2, w2, W Ua, -, which is held by its contact r21. In the ninth position, the resistor w2 is again short-circuited, so that the relay R. = is drawn into the second stage, whereby the excitation of the relay R3 is prepared by closing the contact r22. The excitation of this relay in the first. Stage takes place in the tenth position of the dialer W U. The relay is held by contact vsl and is brought to the second stage in the eleventh position of the selector WU by short-circuiting the ballast resistor w3. The short circuit of the series resistor w3 occurs through the two contacts hl and u2 of the relay U, which is excited in the eleventh position of the selector WU:. +, U, series resistor wu, W U ", -.

By closing the contact u3 of the relay U, voltage is also applied to the arm WUb of the selector WU, so that the relays R4 and R5 are excited in the manner corresponding to the relays R1 to R3 when the selector contacts are passed through for the second time. When the voter arm WUb is in the zero position, the relay R4 responds via the contact u3 and the voter arm WUb. In the first stage: +, ti2, y32, R4, w4., WUb, u3, -. Relay R4 is held by contact y41 and is pulled through in the first position by short-circuiting the series resistor w ,,. In the second and third selection step, the relay RS is first brought into the first and then into the second stage in the same way. In the ninth step of the selector WU, a circuit for the relays K1 and K2 is closed by the selector arm WUb: +, K1 or K2, WUb, 711, -. The relay K1 opens its contact k ", whereby the relay interrupter is switched off. The selector WU remains on the ninth step. At the same time, the series resistors w1 to w ;, for the relays R1 to R , short-circuited via the contacts r11, r21, rat, y41, r51. Through the contacts r23, ras, r43, r53, the relays R1 to R4 were also placed in a holding circuit independent of the contacts til and ti2, so that only the relay R5 remained dependent on the state of excitation of the relay T = through its contact ti3. During the gradual excitation of these relays R1 to R5, they had short-circuited the series resistors wll to wle by means of their contacts r14, r24, r34,; "4, r54 and as a result, the alarm current sent by the ringing current generator G via the contacts ta23, ta24 to the alarm line AL gradually swell up to the full value. Since when relay K2 responds by opening contact k21, the holding circuit of relay TJ is opened and contact Nil .des relay HJ is not closed either (relay, RU [Fig. 5], because no current flows on line L) is de-energized , so that the contact ru2 lying in series with relay HJ is opened), the relay chain now drops out by first causing relay R5 to drop by opening the contact tig. By opening contact r53, the holding circuit of relay R4 is opened, so that this relay opens the holding circuit of relay R3 through its contact r43. The holding circuit of relay R2 is finally interrupted by contact r33, so that when contact r23 opens, relay R1 drops out and the relay chain is returned to the rest position. During this dropping of the individual relays R1 to RS, the pre-signal sent by the alarm machine G is slowly switched off again by switching on the series resistors This controls with its contact rtt2 the relay HJ, which in turn passes the impulses on to the relay TJ via its contact Nil. The grain cycles til to ti3 of the relay TJ now cause the relay chain R1 to R5 to respond one after the other, with each of these relays as a result of the short circuit of the upstream resistor windings through the contacts k12 to kle immediately into the second stage.After opening the ti contacts, the relays R1 to RS drop out again in reverse order, so that even during the impulse from the command post, the stage switching through the contacts r14 until r54 takes effect.

R. Connection of the selected subscriber to the telephone device If the telephone button is pressed after the alarm has been sent out by the command center, the relay T is energized there, as described above Connecting line L turns on, whereby the two chokes Dra and Drb are switched into the line at the same time. As a result, the quiescent current flowing via the line L and the contacts i1 and i2 of the relay I is weakened to such an extent that the relay RU I cannot respond as before. This causes the relay TU to respond: +, rli3, .rztIl, TU, -. The relay TU switches by means of its changeover contacts tul and tii. the alarm line AL from the alarm generator G and to feed line SZ. The connecting line L is thus in this way via the capacitor Cpo1 lying parallel to the polarized relay POL , the contacts dltg, dzi4, the capacitors Ca and Cb and the contacts titl and tzt. connected to the alarm line AL , so that speech communication between the participants and the command center can take place in a known manner. Resetting the switching means in the exchange As can be seen from the description of FIG. This polarity reversal causes the polarized relay POL , which is in series with the line, to respond, which changes its contact pole and causes the relay EU to respond: +, pol, wave contact w., EU, -. This starts the relay interrupter consisting of the relay I "and IIu through its contact eul. The contact I" now switches the rotary selector magnet D gradually to the zero position via the shaft contact w2, whereby the contacts w1 to w3 and the head contact k also open . This causes the relays BU, DU and EU to drop out, so that the relay breaker is also shut down. When the relay DU drops out, the holding circuit for the relay PU is also interrupted and, as a result, both the relays TA and TA de-energized and the alarm machine 11I shut down. The connected group relays also drop out, since their supply via the contacts du5 and pul is interrupted. With this, however, the system has returned to its original position, and the relay IU is ready to receive -in the course of the line-

Claims (3)

PATENT CLAIMS: i: Arrangement for issuing an alarm to a plurality of subscribers from a control center, characterized in that one or more subscriber exchanges (hSt) are connected to the control center (KSt), their alarm transmitters (ALG) from the control center according to the selection of the subscriber group to be alarmed alert this group in the manner indicated by the central office. 2. Arrangement according to claim i, characterized in that in the control center (command post) in addition to the switching means used to select the desired participants, there are others Any stepping mechanisms that can be set by hand are provided by setting them .the individual alarm pulse series of the series consisting of one or more such series Alarms. 3. Arrangement according to claim i, characterized in that the lines connected to the control center, leading to the switching actuatorf, are traversed by a quiescent current, the interruption of which by a broken wire or the like optical sign switches on. q .. arrangement according to claim 2; . characterized in that after the subscriber's selection has been completed, switching means (c24) in the control center are actuated, which z. B. by interrupting the line quiescent current, a transmission of further current surges by pressing the dial. 5. Arrangement according to claim 2, - characterized in that switching means are operated in the control center in dependence on the device actuated in the selection of the participants, which prepare the actuation of a device serving to set the alarm. 6. Arrangement according to claim 5, characterized in that after the participants have been selected, switching means (c25) are actuated in the control center, which apply voltage to a circuit arrangement serving to set the alarm. 7.'Anordnung according to claim i, characterized in that both the choice of participants and .die setting of the alarm is carried out by pressing one or more dials which act on switching means arranged in the control center in such a way that the current impulses used to select the participants cause the selection directly by setting a selector, while the setting. The current impulses serving the alarm are first stored and only then serve to control the alarm = 8, arrangement according to claim 7, characterized in that the `` keying '' of the position of the memory set according to the desired alarm by means of automatically or manually by actuating a Switching means (AT) activated switching means operating in the manner of call seekers is effected, the current pulses causing the scanning simultaneously serving to control the desired alarm. G. Arrangement according to Claim 8, characterized in that after the memory has been set in the central unit, switching means (e5) are actuated which automatically switch on the call seekers or the like which cause the scanning or prepare their switch-on by manually operated switching means ('AT). ok Arrangement according to Claim 7, characterized in that, in addition to a selector serving to scan the set memory and to send out the impulses controlling the alarm, a further selector is provided, which is expediently started to rotate once after each scan of a set alarm number and prevents the following alarm digit from being scanned during its cycle. II. Arrangement according to claim 10, characterized in that switching means are provided for generating pauses of different lengths between the scans of two successive alarm digits, which switch the selector between two pulse series of an alarm signal faster than after a full alarm signal. i2. Arrangement according to Claim i, characterized by switching means which automatically reset the entire device in the control center to the rest position only after a full alarm signal has been given. 13. Arrangement 'according to claim i, characterized in that manually adjustable and the resetting relays influencing means are provided which prevent automatic actuation of the reset relay after giving a full alarm signal. 14. Arrangement according to claim 13, characterized by a stepping mechanism interconnected with the resetting and manually adjustable switching mechanism, which is advanced by one step after each transmission of a full alarm signal and when a position corresponding to the number of desired transmissions is reached via the corresponding to the The same number of manually set means prepares or closes a circuit for the reset relay. 15. The arrangement according to claim 14, characterized in that, independently of the resetting of the switching device in the control center, the resetting relays o. 16. The arrangement according to claim 15, characterized in that in addition to the manually operated switches, depending on the state of the backward, steep switching device dependent switching means (y2, an,) influence the reset in such a way that regardless of the time of actuation of the switch Resetting can only take place before the actuation of the switching means causing the scanning of the memory according to claim 8 or, if the resetting is to take place after the scanning has started, only after at least one full alarm signal has been given. 17. The arrangement according to claim 2, in particular for systems with multiple use of the lines leading to the subscribers, characterized in that a delay device (Fi, g. 4) provided in the control center starts when the switching means (AT) which causes the memory to be scanned is actuated the scanning of the memory by one for transmission. a pre-alarm prevents sufficient time. 18. The arrangement according to claim 17, characterized in that at the beginning of the operation of the delay device in the exchange: the device for sending the pre-alarm is started by a current pulse, which then automatically sends the pre-alarm and ends again after a certain time. ig. Delegation according to Claim 18, characterized in that the pre-alarm consists of a slowly increasing signal which is generated by gradually switching resistors in the signal circuit on and off. 2o. Arrangement according to Claim ig, characterized by a relay chain (R1 to R $) which, according to its step-by-step construction, switches off resistors (W11: to U119) in the alarm circuit in stages at the start of the pre-alarm. 21. The arrangement according to claim 2o, characterized in that the relays of the relay chain of a stepwise z. B. operated by a clock operated switching mechanism (WU) in succession, where they are both excited and held in dependence on each other. 22. Arrangement according to claim 2o and 21,. Characterized in that both the first and the last relay of the chain depending on contacts (tii, tis) are energized or de-energized, which are not from the relays of the chain, but from the When the memory position is scanned, the pulses sent out can be controlled directly or indirectly, so that the activation of the pre-alarm is effected by a pulse sent out by the control center - which switches on the alarm machine in the exchange as well as by means of a circuit arrangement (TAi, TA., HT, TJ) which influences the pre-alarm regardless of the duration of the received pulse. 23. The arrangement according to claim 22, characterized in that after the pre-alarm has been sent, the alarm device is controlled in time with the pulses sent by the control center. 24. Arrangement according to claim i, characterized in that a relay (z. B. POL) of the receiving device in the exchange is used to reset the device in the exchange; the Z. B. responds to a reversal of the polarity of the line current caused when the device is reset in the control center and causes the switching devices in the exchange to be reset. 25. The arrangement according to claim i and 2, characterized in that the control center sends out pulses over the line when the participants or groups of participants are selected, which in the exchange is a dialing device, for. B. rotary dials, influence "over 'which, after their setting, the relays assigned to the desired subscribers are excited.. 26. Arrangement according to claim 25, characterized in that a subscriber is assigned several relays which are excited at different positions of the dialing device. 27. Arrangement according to claims 2, 5 and 26, characterized in that the relays, when they are excited by means of their contacts connected to the desired subscribers, conveniently connect the subscribers via a common alarm line to the alarm device arranged, for example, in the exchange. 28. The arrangement according to claim 22, characterized in that switching means (Z) are provided in the central office, which -depending on the selected subscriber group, the selected alarm or depending on both, the automatic resetting of the switching devices in the control center and the exchange z B.; Arrange for the provision by separating the prevent the relay in the center. 29. The arrangement according to claim 28, characterized in that automatically or manually operated switches are provided in the control center after the alarm has ended; B. consisting of a weakening of the current of the rtihestroane flowing after the alarm is generated by switching on choke coils in the line, a switching device is actuated in the exchange; which connects the alarm line common to the selected subscribers to the control center expediently with simultaneous disconnection of the alarm device and, if necessary, connects a device for the central supply of the connected subscriber devices to the alarm line. 30. Arrangement according to claim 25, characterized in that in the line leading from a subscriber to a telephone exchange. Contacts are switched on, which when the associated relay is excited in the exchange, the subscribers from the telephone exchange and switch to the common alarm line. 31. Arrangement according to claim i to 30, characterized in that each switching center is connected to the central unit via only one double line, via which the central unit receives current impulses @ of various types (current amplification, weakening, polarity reversal, interruption, alternating current different frequency or the like) to the exchanges to identify the different types of switching operations to be carried out by the exchanges.