DE648551C - Circuit arrangement for telephone amplifier systems - Google Patents

Description

In telephone repeater systems in which trunk lines can be combined with other trunk lines or interconnected with local lines, d. H. Incoming and outgoing S. connections are established in the If the line attenuation is too great, the amplifier is switched on in * the through connections, which may also include connections from long-distance lines with long, heavily attenuated local lines are. If the mediation takes place through semi or fully automatic institutions, so it is expedient to equip the heavily attenuated lines with power amplifiers that ever as needed, d. H. when making through connections, switched to the line and only then ignited in a known manner, d. H. be made ready for use. With the previous telephone amplifier systems arrangements have become known in which the amplifier is selected by means of selection devices that are located at the input and are provided at the output of the amplifier. Furthermore, there are also follow-up drives in the called and the calling line has been provided to the appropriate Switch on line extensions.

The invention relates to a circuit arrangement for telephone amplifier systems, in which the connected to a semi or fully automatic switching device Lines are partly equipped with line amplifiers and these are assigned by these lines as required Shared drives, which are set to the desired lines concurrently with the selectors of the switching facility, in the line can be switched on, with the caller line sharing the Power amplifiers on both the calling and the called line are switched on, and only if both lines need reinforcement, i. H. with power amplifiers are equipped.

The follow-up drive therefore has four tasks. Once it must be able to run with every line selected, so it must not be permanently connected to a single line. Second, it has to check whether or not amplifiers are on the lines. G-third ₀ least it must possibly through the amplifiers. Fourthly, after it has completed its task, it must immediately return to the starting position in order to be available for further switching operations which are due to the call from other subscribers. Compared to the known, the subject matter of the invention has the advantage that only one or a few co-drives are required, which are selected as required via a call searcher and which solve all four tasks identified above.

*) The patent seeker stated as the inventor:

Artur Strache in Berlin-Karlshorst.

According to the invention the plant are associated with a plurality o ^ he Mitlaufwerke be adjusted to the desired number line ^ the device to the calling trunk only for the time of the switched connection setup and the same continuously with the voters of the switch ". ⁴ The long-distance or local lines in need of reinforcement are assigned additional organs, relay sets, via which ίο the follow-up mechanism, consisting of the caller and counter, is requested and controlled and, when checking a line in need of reinforcement, the or switched off, ignited and extinguished. Power amplifiers are added to the long-distance lines that require amplification. Irrespective of the duration of the voice connection, the shared drive is immediately returned to the starting position immediately after the line has been checked and made available for new connections.

For the sake of simplifying the circuit and making the system cheaper expedient, especially in the case of semi-automatic switching devices, the total number to divide the lines in need of reinforcement into groups and these groups to have all the switching functions carried out, which are not necessarily the individual lines are peculiar. These group community functions are essentially that Picking up the tracking mechanism to the calling group and the transmission of the switching impulses on the follow-up drive.

In one embodiment, the circuit arrangement is shown schematically, namely for a semi-automatic office where the calling line is in the manually operated one In the usual way, you are asked for the required line number on a numeric transmitter is set, which in turn automatically establishes the connection. In the exemplary embodiment, the lines in need of reinforcement are not only on both sides with control organs, but also with power amplifiers and the necessary switching relays Mistake.

Since the connection of the voice line is established in a known manner, this is only mentioned in the description where necessary.

If the exchange is called via trunk line F ₁ , for example, the interrogation device of the place is switched on to the calling line in a known manner by flipping the space query switch PS ₁ assigned to trunk line F _1. When switching the switch PS ₁ , the circuit for the relay L ₁ assigned to the calling trunk line and the relay G ₁ assigned to the group of the calling line is switched on via its contact 3. Contact Z ₁₁ of relay L ₁ prepares the inrush current for relay U ₁ , via whose connector M ₁₃ the amplifier is later ignited and JJbjer M ₁₄ and w _{is switched} into the cable run. The group relay G ₁ closes with its contact g ₁₆ (the contacts g _2e and g ₃₆ are the stimulus contacts of a second and third group) the circuit for the rotary magnet D _s of the place seeker attached to the traveling mechanism. Space seekers and all voters of the follow-up works are stepping mechanisms known from self-connection technology. Under the influence of his self- _breaker contact ds ₁₇ , the site seeker now moves his contact arms ds _{iB -ds 2 (t} step by step over the contact paths until the arm ds _ls hits a contact lamella, via which the positive pole of the battery (earth) is connected to the circuit for the test relay Ps. In the example, this is done via the lamella connected to contact g ₃₁ , since contact g ₃₁ belonging to group relay G ₁ is currently closed ^ The relay Ps picks up and switches the circuit for the rotary magnet DS via its contact ps _Si off, so that the viewfinder arms dy _J8 - (i $ ₂₀ on the last lamella of their contact paths are stopped. The switching of the pulse circuit for the follow-up mechanism is prepared via contact ps _i6 and arm ds _19. The lamp SL in the circuit of the relay Ps lights up and indicates to the operator that a shared drive is available.

On the part of the operator, the number of the line to be called has been set on the numeric transmitter ZG ₁ , which is now brought to run in a known manner when the lamp SL lights up. The number transmitter works on the one hand on the dialers lying in the speech path and on the other hand in parallel to them via the contacts Z ₂₁ and 2 _{U of} a relay Z belonging to the number transmitter and not shown on the pulse and control relays Z ₁ and S ₁ assigned to the group. Z ₁ is a rapidly falling relay that follows each control pulse, while S _{1 works} with a drop-out delay and only drops out in the event of major power interruptions, for example after the end of a series of pulses. The encoder pulses transmitted by the pulse contact J ₄₁ belonging to the relay J _{1 are now transmitted to the follower mechanism via the armrfs 19 of the place seeker.} The contacts i _4t and f ₄₃ as well as S ₅₂ and S ₅₃ belong to the control relay of other groups.

In the example it is assumed that the switching system comprises a group of thousands

and therefore the connection establishment in three deca levels (hundreds, tens, ones) manufactures. The follow-up mechanism also corresponds to the scope of the switching system expanded and consists of three consecutive decade selectors, of which over the first voter the hundreds, the second the tens and the third the ones is set. It works accordingly

to voter of the hundreds group parallel to the group voter of the main line train, the Tens selector parallel · to the stroke level of the line selector and the ones selector parallel to the rotary level of the line selector.

In accordance with the structure of the follow-up mechanism, the series of impulses for the first selection stage is directed to the relay S ₁₀₀ and the rotary magnet D ₁₀₀ . With the first impulse the circuit is closed via earth, the contacts i ₄₁ und.J ₅₁ , the selector arm ds ₁₉ , the contacts ^ j ₃₅ and To ₁₀₁ and the windings of the relay S ₁₀₀ and the rotary magnet D ₁₀₀ . By energizing the rotary voter magnet D ₁₀₀ , the contact arms a _iw -a _{113 of} the voter of the hundreds group are moved forward by one step with each pulse. The relay B ₁₀₀ is a relay with delayed drop-out, which holds its armature in the pick-up position during the entire series of pulses and only drops out again after the series has ended. The contact W ₁₀₁ is a so-called wave contact, which mechanically moves from its designated position to the mating contact when the selector leaves its zero position (permanent starting position). The pulse circuit interrupted after the first _{selector step at Zu 101} nevertheless remains closed via the relay contact O _{102 lying parallel to -W 101} during the entire series of pulses. After this has ended, prolonged opening of the contact I ₄₁ results in a major interruption of the pulse circuit, the relay B ₁₀₀ now drops out and therefore switches off the relay winding S ₁₀₀ and the rotary magnet D ₁₀₀ from the pulse circuit and this via & ₁₀₃ and the selector arm a ₁₁₂ on the rotary magnet D ₁₀ and the control relay S _{10 of} the tens selector in the selected hundreds group. With the second series of pulses, the tens dial is set to the desired decade in accordance with the switching operations of the hundred _{dialer through D 10} 'and S _{10 , after the second series of pulses the pulse circuit} via the contacts w ₁₂ i and b 1Z5 w ¹¹ ^ opens the selector arm C ₁₂ ^ the relay S ₁ and the rotary magnet D _{1 of} the selector switched through, which in turn is then set to the desired line number by a third series of pulses.

If the line set via the follow-up mechanism is in need of amplification, the test circuit switched through via the selector arms ds ₂₀ , C ₁₁₃ , C ₁₂₃ and C ₁₃₃ continues to relays I _{2 and} I H ₂ , which are directly assigned to the called line F _2.

If the called line is free, the relay I ₂ , that of the called line, and the relay IH ₁ , which belongs to the calling group, are excited via the circuit just described. About the group Contact Hlae the relay IH ₁ and the contact i of the line relay L _{1 n} j is the transfer relay U ₁ ow calling line turned on, for the entire duration of the call connection via its own • Contact M ₁₂ and the contact # ₄₀ adheres , which belongs to a relay T ₁ in the set of the normal connection selector (preselector), which is also energized for the entire duration of the connection. Relay U _{1 changes} its contacts M ₁₃ , M ₁₄ , M ₁₅ , whereby the amplifier V _{1 of} the calling line is switched on and the heating circuit of the amplifier is closed.

The line selector in the course of the normal connection setup checks the called line in a known manner to determine whether it is free or busy and sends ringing current into it when the line is unoccupied. This ringing current creates a. Relay R ₂ located in the bridge to the α / δ branches of the called line energizes which · in addition to other contacts also contact i? ₂₀₅ closes, so that now a circuit for the relay H _{2 is} closed in _{parallel with the relay I 2.} When the calling line .F ₂ is occupied, the relay T ₂ belonging to the selector of the line F _{2 is} energized in a known manner for blocking against other calls, so that the circuit for the relay U _{2 is} closed via the contacts t _2M and H _200. Relay U ₂ closes its holding _{contact M 220} parallel to contact H ₂₀₆ according to the processes at U ₁ and further switches amplifier V ₂ into the called line via contacts M ₂₄ and M ₂₅ and closes the heating circuit for this amplifier via U ₂₂₃ . Here, too, the binding of U ₂ remains until the voice connection is terminated, ie until T _{2 has} dropped.

By switching on the amplifier in the line, the function of the tracking device is fulfilled and can now be made available to other connection structures. For this purpose, the tracking mechanism must be returned to its zero level in order to always be able to make the correct count. As a result of the above-mentioned excitation of the relay H ₂ , the battery is removed from the relay I ₂ via the contact H ₂₀₁ , so that it drops out. Relays R ₁ , R ₁₀ and i? _100>

assigned to the decade voters of the follow-up mechanism are now excited via the contacts t. _2Qi , I ₂₀₂ , the voter arm ^ ₁

ni

_ll0 , b _ui R.

b _ui and

_{2Qi 20 131 l u}

from here in the parallel branch to R ₁ via / «, R ₁₀ via the contact arm C ₁₂₁ , O ₁₄₃ , / ₁₄₄ and again in parallel continuation via the selector arm O ₁₁₁ and the contacts ^ and r ₁₄₆ the relay i? ₁₀₀ . The three i? Relays mentioned are connected via their contacts in ίο holding circuits, namely R ₁ via the contact r _li2 and the selector arm £? ₁₃₀ , the relay R ₁₀ via the contact r ₁₄₄ and the selector arm e ₁₂₀ and the relay i? ₁₀₀ via contact r _lie and voter arm a ₁₁₀ . The selector arms <z ₁₁₀ , C ₁₂₀ and C ₁₃₀ are on the so-called zero track, i.e. a contact lamella closed over the entire length of the track, which is only interrupted by a single contact in the zero position, i.e. the starting position of the selector. The relays R ₁ , R ₁₀ , R ₁₀₀ therefore remain energized until the three decade selectors have reached the zero position again. Through the relays R of the three voters, the rotary solenoids D ₁ , Z) ₁₀ , D _{100 are} energized independently of one another, in the case of the single selector via the contact r _13G and the self- _{breaker contact D 134} belonging to the rotary solenoid D ₁ , in the case of the voters of the higher option levels corresponding. Under the influence of the self-breaker contact, all three voters now simultaneously turn their contact arms forward until the arms C ₁₁₀ , C ₁₂₀ . C ₁₃₀ , with them of course also the others, reaches the zero position in which the i? Relays and thus also the rotary solenoids are switched off. When the relay R _loa drops, the rotary magnet Ds of the place seeker is placed again on the incentive line leading to the groups via the contact ^ ₁₀₀ , so that the place seeker and thus the follower is ready for new calls.

If the selected line is a line that is to be connected to the calling party without amplification when setting the follow-up mechanism, the relay R _{1 is} energized via the relay R 1 immediately after the relay B _{1 in the single dialer drops out, since the contact strips of these line numbers are permanently connected to earth} the contacts r ₁₄₂ , b _ui , JH ₁₁₀ and the voter arm ^ i3i · As with the implementation of the voter in the zero position described above, the same circuits are now used again, the only difference being that earth is placed _{directly on the contact arm e lsl} is, the relays R ₁ , R ₁₀ , R ₁₀₀ energized and thus initiated the return of the voters to their zero position.

In the event that not all groups of hundreds and tens with need reinforcement Lines are occupied, the hundreds and tens voters are connected to the contact lamellas, which represent such groups, also laid out directly on earth, so that immediately upon contact with such Lamella of the voter or voters are immediately returned to the rest position and further impulses via the follow-up mechanism are prevented. For such groups no tens or singles voter is installed in the subsequent elective levels.

If, when setting the follow-up mechanism, it encounters a line that needs reinforcement but is busy, the circuit for the relays R ₁ , R ₁₀ and R _{100 is} closed immediately, since the relay T _{2 is} energized on the busy line, as the slowly responding relay I ₂ cannot open its contact I _{202 in} time. The follow-up mechanism receives _{its return stimulus via contacts Z 204} and I ₂₀₂ , while the switching and ignition relays of the called line remain idle.

In the case of semi-automatic systems, in order to be able to correct incorrect settings of the numerator before calling the called line, it is common to stop the numerator by pressing a so-called correction key and return it to its idle position. In the present example, it is necessary to bring the follow-up mechanism to the starting position before the newly set number transmitter sends out its series of pulses. When you press the correction key (not shown) on the numeric transmitter, the triple contact marked kr on the drawing is closed and thus earth to the relays R ₁ , R ₁₀ and i? ₁₀₀ , which in turn cause the voters of the Mitlaufwer ^ ces to be returned to their starting position in the manner described above.

If a trunk line in need of reinforcement is connected in parallel with several trunk lines of the same type with the same destination, the line selector automatically selects a line that is currently free in the case of multiple connections. In order to ignite the correct amplifier, it is necessary that the one who chooses the follower mechanism also makes this free choice. If the follow-up drive is set to one of the numbers of the multiple connection and this and the subsequent ones are occupied, the To relays of these lines are energized and contact Z _{204 is} closed. _{Relay Af 1} is energized once via contact Z ₂₀₄ and selector arm C ₁₃₂ , and in parallel with this via contacts b _uo , r _13e and J ₁₃₄ the rotary magnet D _{1 of} the single selector. The selector now runs under the action of the self-interrupter _{contact J 134} over the contact track until it hits a lamella

. opens, which, as a result of the free state of the associated long-distance line, has not yet received any ground potential via the contact i ₂ o4. The testing of the activated long-distance line as well as the switching and ignition of the amplifier takes place in the prescribed manner.

Otherwise , the subject matter of the invention is not limited to the example shown; the follow-up mechanism will usually be set up in such a way that it is adapted to the system of the automatic switching device, for example if there are other types of voters available there, such as the non-decadic system, the follow-up mechanism is provided with corresponding voters. Or a square selector can be used in the described arrangement instead of the tens and singles selector. Furthermore, it is possible to use a device according to the invention in the case of only one line equipped with amplifiers, the one amplifier being fired after the called line has been checked.

Claims (7)

Patent claims: ι. Circuit arrangement for telephone amplifier systems, in which the lines connected to a semiautomatic or fully automatic switching device to the Some of them are equipped with line amplifiers and, if required, they are assigned follow-up drives through these lines, which are set to desired lines concurrently with the selectors of the switching facility, in the line are switched on, characterized in that the follow-up drive of the calling line the power amplifiers of both the calling and the called Line are switched on, and only if both lines need reinforcement, d. H. are equipped with power amplifiers. 2. Circuit arrangement according to claim i, characterized in that when the follow-up mechanism runs onto a line equipped with power amplifiers the switching organs of the amplifiers of both lines are put into action and bind themselves in such a way that they do not do anything of the shared drive remain in operation for the full duration of the line connection. 3. Circuit arrangement according to An-Spruch ι and 2, characterized in that that the follow-up drive is not permanently assigned to the line, but rather via a place finder assigned to it as required the calling trunk line is switched on. 4. circuit arrangement .according to claim i, 2 and 3, characterized in that that the shared drive remains assigned to the calling line only for the duration of the connection setup. 5. Circuit arrangement according to claim ι to 3, characterized in that that the shared drive, if the line to be called is busy, or when accruing immediately to a line or group of lines not equipped with repeaters is returned to the rest position. » 6. Circuit arrangement according to. Spruch ι to 5, characterized in that that by a correction device at any time the structure of the follow-up mechanism interrupted and this can be returned to its original position. 7. Circuit arrangement according to claim 3, characterized in that the allocation of the follower mechanism is indicated by a signaling device. For this purpose ι sheet of drawings