BE454021A - - Google Patents

Description

       

   <Desc / Clms Page number 1>
 



  "Device for setting or controlling selector switches in automatic long-distance communications".



   The present invention relates to devices for the automatic establishment of long-distance communications, also called interurban comminica inos. These telephone communications pass through a number of central or concentration offices and require for their establishment, in addition to the local number of the called subscriber, a long distance number which indicates to which local network the called subscriber is connected.



  Usually, local networks can be constructed in the shape of stars so that each digit of the subscriber's local number clearly indicates a direction of traffic. This is not the case in a long distance network. A toll direction of traffic is usually determined from less than two consecutive digits of the toll number.



   In addition, there is often the possibility of reaching the office called by more than one direction of traffic, and, in case all the lines in a given direction are busy, it is desirable to form the call in one direction. another direction of traffic in which the called office can be reached.



   It is known to establish long distance connections to

 <Desc / Clms Page number 2>

 using long distance recorders which changes the long distance number of the called local network to a number suitable for the connection process, each number of which clearly indicates a direction of traffic. This method, however, involves quite complicated recorder arrangements and each office in the long distance network must be equipped with special recorders suitable for the connections starting precisely from that office. In addition, the number of distinct connection paths which must be governed by each recorder becomes very large.

   The greatest disadvantage of the mentioned method is, however, that all communication paths have to be fixed from the start and that redesigning the traffic paths results in changes in all toll registers.



   It is also known practice to issue the long distance number of the local area network called from office to office and to provide in each office, through which the connections pass, 3 recorders which receive the long distance number and present it to selectors connected to the long distance lines. in a direction of traffic corresponding to the trunk number.



   This method does not have the disadvantages of the previous method, but instead entails another great disadvantage, namely that the connection operation takes a lot of time in the case where a number with several digits must be repeated several times.



   The present invention aims to eliminate the drawback of the latter method and achieves this object by transmitting the arrangement or digit formation from a recorder in a telephone office to a telephone recorder. another office and this by means of power pulse trains which correspond to the digits given by the arrangement of digits, so that two digits or more than two digits are transmitted simultaneously and by means of current pulses alternating current alternating current frequencies, each alternating current frequency indicating a place in the arrangement of digits,

   however, the number of current pulses of the same alternating current frequency indicates the value of the digit which takes the place indicated by the alternating current frequency.



  To further shorten the connection operation, the recording devices are connected to the connection lines to which calls have arrived and this by means of relay selectors of known construction, called coordinator selectors, in which the The connection operation is emoroée by an electromagnet connected in series with a

 <Desc / Clms Page number 3>

 discharge tube and which, on ignition of the discharge tube, is actuated, and said discharge tubes are ignited ei. serial <with a resistance common to a Group of recording devices.



   By virtue of this arrangement, the switching on of a recording device can be carried out very quickly, which emerges from the description given below.



   The group selectors connected to the interurban lines are arranged in the same way, they are also made up of selectors - coordinators and regulate the recording devices, the connection operation being initiated by two electrically connected in series. , one of which belongs to the recording device and the other to the group selector, and the two electromagnets mentioned are connected with a discharge tube which is ignited in series with a resistance common to a group of selectors group and recorders. The setting of a group selector can take place very quickly with this device, which is described in more detail below.



   Fig. 1 represents a number of interurban offices or exchanges and the network of interurban lines which connects them. It emerges from fig / as / one can, to a certain extent, give the interurban network a star-shaped construction around given large cons, for example in the oonoentration or centralization office 36, which is the center of all offices 371-379 and 381-389.



  However, between such centers, some direct lines must be drawn to avoid too long and too expensive detours. The numbering for long distance offices is 3 digits, but with the star clustering around larger centers according to the figure, the last digit will clearly indicate the direction of traffic, so only the first two digits need to be recorded and issued from office in the office.



   Fig. 2 shows line equipment for a trunk line, and FIG. 3, the GV group selector belonging to the same line. Fig. connects to fig.



  3 by the connections going downwards in fig. 3 and represents a REG recorder and its finder R8 which are temporarily connected to the REG recorder of the CV group selector.



   The interurban line is according to fig. 2, constructed as a 4-strand line or pipeline comprising a1 bi and a2 b2 line branches, but the connection diagram also relates to a 2-wire line, in the case ocelle-oi @

 <Desc / Clms Page number 4>

 is using a differential transformer and a line balancer, divided in the known manner into rear branches.
 EMI4.1
 vee and start, which correspond to the children a1 b, and aE b2.



  A call signal from the line arrives at the wires al b1 and activates the signal receiver Mi The signal receiver 1d2 is tuned to a frequency other than M1 and is not activated by call signals. The two signal receivers are rao- oorded to the incoming branch and are therefore not actuated by outgoing signals, ie transmitted. In each of the two
 EMI4.2
 branches a 1b1 and a2 ba, there are amplifiers FH for the incoming (received) signals and FV for the outgoing (transmitted) signals and the conversation. In the differential transformer
 EMI4.3
 DT, the two branches a1 bl and aa b2 are united in a line with two wires a and b to the balancing wires A and B.

   De3 signals leaving are friends at frequencies fl and f2 using relays RF1 and RF2 next to the transformer Tr which is tuned with the balancer BV corresponding to the input impedance of the amplifier RV, so way that the alternating current of
 EMI4.4
 frequency fl starting from contacts 15 and 16 of relay Ryl, does not pass through contacts 85 and 2a of relay Rygg and the alternating current of frequency f2 starting from contacts 25 and E6 of relay RF2 does not pass to contacts 15 and 16 .



   A call signal activates the M1 signal receiver, so that the RF6 relay attracts its armature from the start of. signal and drop it after the end you signal. By this,
 EMI4.5
 contact 62 closes and relay PX 1. receives positive blade current (hereinafter referred to as "plus") from the battery
 EMI4.6
 by a winding of the relay R1D, passing through the oontaot 92 and the contact a2 towards the negative pole (hereinafter referred to as "monk") of the battery. Relay Ry 1. attracts its armor and connects contact 62 with contact 102 so that a very short current pulse from relaia RF6 causes
 EMI4.7
 a complete reaction of the RF relay armature. The Rrg relay attracts its armature when contact 1or closes.

   Contact 92 breaks and contact 93 closes, whereupon the relay RF10 loosens its armature a little slowly as a result of a release.
 EMI4.8
 tance connected in parallel with the winding of relay R'10 The fall time of relay RF1 prolongs a too short current pulse arriving and relay R1r10 repeats the current pulses arriving at relay Rlr9, which, by contact 93, connects locally in a dependency ratio / M contact 2, so that a long current pulse of RF 8 is repeated throughout its length at relay R9. When RF 9 attracts its armature, contact 94 closes and the following current path is formed: positive, contact 94, contact 85, contact 131, contact

 <Desc / Clms Page number 5>

 
 EMI5.1
 152, the winding of relay R1r15 towards negative.

   Relay Pr 15 is a two-stage relay which, in the current path described, reacts via the first stage, thus closing contact 151. After the call signal has ended, relay RF6 releases its armature, the
 EMI5.2
 contact 62 breaks, relay RF9 drops and contact 94 Be breaks. By this, the RF15 relay attracts the second stage of its armature by the following current path: positive pole, contact! 81 and 91, contact 151, the two windings of RF1 in series,
 EMI5.3
 towards less. The RF relay 15 activates its contacts 152-158. When contact 153 closes, relay RF16 attracts its armature and its contacts are actuated.



   Fig. 2 shows on the left, six connection wires a, b, A, B o and d which come from the different fields of the GV group selector switches. When a group selector, GV tries a trunk line as represented by the fib. 2, this is done by wire o, the rest contact of the stop button BK, the
 EMI5.4
 contacts 155, 12 and 112, the winding of RFit the contact 63, the minus and in parallel with the winding of Pi 1, by the contact 122, the resistance r., contacts them 141, 154 and 63, and the least. Already at the start of a call the current path of self is already interrupted at contact 63. When relay Rir 10 attracts its armature, relay Rlrll receives current through contact 103 and attracts its armature, after which the course of oourant d'es-
 EMI5.5
 sai is interrupted at contact 112.

   Relay Rll1 is connected in parallel with an electrolytic capacitor] [, and is energized
 EMI5.6
 therefore for a teiapx which is considerably longer than an inrush current pulse. When relay PT 1. attracts its armature, the test current path is interrupted at contacts 154 and 155, causing the line to be kept marked ("busy" for outgoing communications or conversations.



   When contact 157 closes, the call in the GV group selector is marked by the following current path: plus, contact 157, contact 26 in fig. 3, the winding of the relay RF1, the contacts 35 and 46, the discharge tube a GLS and the resistance me at the negative pole of a battery with a voltage of 180 volts, the positive blade of which is connected to the plus and who
 EMI5.7
 in the following will be designated .jur the expression "the less than 180 Vs.



  The ms resistance is common to all the GV group selectors
 EMI5.8
 and recorder%, REG. If a single HS group selector should be marked "called, its discharge tube G L.S will light up, If multiple HS group selectors should be arched" called
 EMI5.9
 at the same time, where it is the discharge tube which has the lowest ignition voltage which ignites and which opens the other discharge tubes.

   Experience has shown that two discharge tubes do not have such a similar ignition voltage that they can

 <Desc / Clms Page number 6>

 light up at the same time in a test circuit of the kind described above, when the common resistance me is of sufficient magnitude, The arrow drawn along the wire between the deohar-
 EMI6.1
 GLS ges and resistance indicates branching to a certain number of GLS discharge tubes in the direction indicated by
 EMI6.2
 the arrow. This designation is repeated at other branch points.

   When the G.L.s. discharge tube is ignited, the RGl relay attracts the armature and the contacts 11, 12 and 13 close. Via contact 13, the call to all
 EMI6.3
 free rogiters is marked by the current path following the minus 180 volts, the resistance mr, the contacts 13 and 20, the discharge tube * GLR in fig. 4, the winding of relay SR1, contact 15, the rest contact in the zero position group of selector RV3, the contact in the starting position of the
 EMI6.4
 RV1 selector, the most. The resistance m is common to all the group selectors G V. and 16 racoordecrert starting from contact 20 in FIG. a is repeated for all line seekers
 EMI6.5
 RS that belong to these group selectors.

   All free RS line ohorahouro are now called in time and the GLR discharge tube which has the lowest ignition voltage ignites and the corresponding SRI relay attracts its armature. There is therefore only one recorder that can answer the call.



  The following current path is closed: the plus, via contact 11 in fig. 3, contact 28, contact 111 in FIG. 4, the winding of the STMI bar magnet towards the minus.



  The STMI bar magnet attracts its frame. It has been assumed here that the calling group selector is connected in the first
 EMI6.6
 first decade, to the happiness of RS recorder.



   Contact 140 closes and relay SR2 attracts its armature.



   The contacts 120-129 close and the following current path is formed: most, through the aontaot 12 in fig. 3, the contact 29, the contact 121 in FIG. 4, winding
 EMI6.7
 of the BRM1 magnetic bridge, the less. THE BRMl magnetic bridge attracts its armature and the set of contacts I-VI corresponding to the bridge
 EMI6.8
 Mil magnetic and stul bar magnet is actuated. The following current path is thus formed: most, passing through contact 153 in FIG. 2, the winding of relay G 2 in fig. 3, the contacts 44 and 33 or 72, the multiple contact V of FIG. 4, the winding of the relay RRl, the less. The RG2 and RR1 relays attracting their reinforcement.



   The RG2 relay in fig. 3 interrupts the current path
 EMI6.9
 from the discharge tube GLB to the oontaot z, and the relay RG1 releases its armature. The current path of the GLR discharge tube in fig. 4 is cut by relay RRl via contact 15,
 EMI6.10
 so that the REG recorder and its Ra finder are marked

 <Desc / Clms Page number 7>

 
 EMI7.1
 "Busy" . The Baa relay in fig. 3 Interrupts at contact 20, the inrush current path of the other free recorders, which previously are blocked by the GLR discharge tube of the recorder receiving the call.



  The contacts 28 and 29 of the relays RG2 interrupt the current paths to the bar magnet 5TWl and the magnetic bridge Bffll. The bar magnet SW1 lAohe its armature, while the magnetic bridge BRUl remains magnetized in a current path passing through contact 131, contact 14, relay RR1, one of the contacts 23 of relay RRE or 64 of relay RR6 and most. Relay SR2 releases its armature and contacts 120-129 are interrupted.



  The operation of connecting a call from an interurban line is thus finished and the line has been connected to a free REG register via the finder thereof.



  The call is marked in the line equipment according to fig. 2, by the fact that the relays RF15 and RF15 attract their armature.



  In the group C V selector, the RGZ relay and in the PR1 relay controller have drawn their armature. The Effll magnetic bridge in the RS seeker maintains the I-VI contacts terminated. At the same time as the marking of the call to the recorder by the fact that the relay B01 in the ry, 3 attracts its armature, the contact 14 of fig. 3 is formed and the electrolytic capacitor K3 begins to charge via the resistor r4.



  Based on the voltage rise at the electrolytic capacitor K3, the current strength is increased in the following current path: the Plus. passing through contact 14, resistors r4 and r5, the winding of relay RG4, the less. Normally, relay RG4 does not have time to attract its armature before relay Ré attracts its own and interrupts the current Oh in4 of relay RGJ, whereupon contact 14 opens at new. If, however, errors should occur or if all recorders are busy, relay RG4 will attract its armature as a result of the current path mentioned; the oontaota 46 and 44 then open and the relay RG4 is connected loosely in the following current path: the plus, passing through the contact 153 of the tig. 2, the contacts 32, 43 and 42 of FIG. 3, the winding of relay R04, the less.

   Consequently, the connection operation ceases without the common resistance ma being blocked by the discharge tube Gi, g, The relay] RG1 1 & che not lràd * U at the opening called contact 45.



  When the recorder is connected to the GV group aéleoteur de la fie. and that the RGS relay attracts its armature, the R08 relay receives current and attracts its armature. In mime J Y.



  ¯e-

 <Desc / Clms Page number 8>

 
 EMI8.1
 time, the telephone wires a, b are separated and closed in one direction via the contacts 61 and 63 and the resil tors r7 and r8 and in the other direction via the
 EMI8.2
 contacta 21 and 22 and aes resistors r and rlo, so that the following parallel current paths are established: the more, the winding of the relay RF5 of fig. 2, the reactance coil D, the rectifiers Rel and Re2 the telephone wires a and b, the resistors r7 and r8, the less. The rectifiers
 EMI8.3
 seura / He8 aim to reduce the damping and the imbalance that the D reaotanoe causes during the reversal.



  The RF5 relay attracts its armature and actuates the contacts
 EMI8.4
 51-57, so that the balance wires A and B are separated and changed so that wire A is connected to relay RF3 and wire B to contact III of the recorder finder RS.



  The balancer side of transformer DT is closed by the switch. medial of resistance ro, in fig. 2, which balances the
 EMI8.5
 reactance D and resistors r7 and r8, in fig. 3.



  According to this, the current pulses arrive from the
 EMI8.6
 trunk line to wires a1 and b, in fig. 2. The current pulses are received by the signal receivers Il and U2 and the relays RF6 and RT7 follow the current induction trains. Current pulses of an alternating current frequency f1 are repeated by relay RF6 on the following current path: least by passing through contact 61 in fig. 2, the multiple contact II of the RS seeker in fig.
 EMI8.7
 



  4, (the connection goes to fig. 3), the winding of magnet MV1 to the recorder selector RV1, the plus. Current pulses of an alternating current frequency f2 are repeated by relay RF7 on the next furthest current path, passing through contact 71 in fig. 2, the multiple contact I of the finder R8 in fig. 4, winding
 EMI8.8
 from the MYE magnet to the RV2 recorder selector. At the same time, the relays Rg8 - RFll of fig. 2 work, without however influencing the connection operation, because in FIG. 3 contact 24 is broken.

   In parallel with MVI magnets and
 EMI8.9
 Y2 from the rig. 4 are mounted windings of the relay pR8, which has a delayed attraction when falling, attine the armature at the start of the current emission and hold it until the last current pulse of that of the magnets
 EMI8.10
 1'V1 and Y2 which receives the longest current pulse train has arrived. The RVI and RV2 recorder selectors are actuated by current pulses and remain,
 EMI8.11
 one, RV1, in a position corresponding to the first digit of the transmitted number and, the other, RGB, in a position corresponding to the other digit.

   When the $ 6100 RVI gearshift tower leaves its starting position, the alto current path

 <Desc / Clms Page number 9>

 next closes; the plus, the contact of the RVI selector zero position group, contact 82, the winding of relay RR5, the minus. Le.relais RR5 attracts its armature, opens contact 58 and is connected locally by means of oontaots 51 and 91 next to the contact in the contact blade 3.of the starting position of the RV3 recorder selector.

   When the RR8 relay releases its armature, the following current path forms 1 most, the RV1 recorder selector contact, the zero position group, the contact 81, the RR7 relay winding, the finder contact VI
 EMI9.1
 R8, the winding of relay RG1 in fig. 3. Contacted them 35 and 46, the GLS discharge tube, the common r6siatanoe mv, the less than 180 volts. The GLS discharge tube is on and the relays RG1 at pin 3 and RR7 at pin 4 attract their armature.

   The winding of relay RR9 thus receives current through contact 72 and attracts its armature, which causes contact 98 to be actuated. And the current path of relay RR5 connecting locally to interrupt you at contact 91 , so that the RR5 relay releases its armature.



  According to fig. 3, relay RG5 receives current through contacts 11 and 27 and attracts its armature,
 EMI9.2
 thus closing contacts 50-59. As only one d6obar ges poft 8tre lit at a time, there is only one GV group selector which could have energized (magnetized) its RG8 relay.



  As the RR7 relay of fig 4 attracts its armature, the following current path closes: the minus, passing through contact 71, the contact of the recorder selector RV1, the contact crown 2 (for example in position 3 ), the RV2 recorder selector contact. contact crown 2 or 3 (for example position 6 of the contact crown
 EMI9.3
 contact 2), the winding of one of the Stol STM10 bar magnets (for example STM1) in fig. 3, a contact of relay RG5 (for example contact 51), towards positive. The bar magnet (in the example STM1) designated by the recorder selectors RVi and RV2 attracts thirsty armature.

   The following opening path closes: the plus, passing through contact 153 in fig. 2, one of contacts 101-191 at pin 3 (in
 EMI9.4
 the example contact 111), contacts 41, 97 and 9 the Loins lliiiltfi, Le P014T. ERI.1 bridge bearing I118gnétiqu, e re its armafu * / and in the first bridge closes the multiple contacts oorrespon-
 EMI9.5
 of which to the actuated bar magnet (821i1 according to the example).

   Contact 91 is closed and the following current path is formed: the plus, passing through contact 153 to pin 2, contact 32 to pin 3, contact 91, the winding of the
 EMI9.6
 BRM2 magnetic bridge, the monks The BRM2 ettil magnetic bridge

 <Desc / Clms Page number 10>

 its armature, interrupts the current path of the winding
 EMI10.1
 of magnet BRM1, is connected locally via contact 93 and transmits current to the winding of the bridge
 EMI10.2
 magnetic BRM3, via contact 92.

   The connection operation is repeated either until a free line has been found, and then the RG3 relay attracts its armature, or until the coil of the RG4 relay receives current, via contact 95 of the last bridge
 EMI10.3
 magnetic ST10, and in this case the relay RG4 attracts its armature, is connected locally via the contacta 42 and 45 and interrupts the operation of connection to the contact 41. In the first case considered the current path of the tube
 EMI10.4
 deorargee GLS is broken in contact 35 and in the last case in contact 46 of relay RG1 in fig. 3 and the RR7 relay in fig. 4 let go of their frame.



   The connection operation in the GV group selector according to fig. 3, can take place in three different ways, namely:
1) When no free communication line is found, as described above, the RG4 relay attracts its armature. Contact 44 is actuated and relay RR1 of FIG. 4 releases its armature, which causes contact 14 to open and the magnetic bridge BRM1 in searcher R8,
 EMI10.5
 let go of its frame. The 1 oontaots I-VI in the oheroheur R6 open and the recorder REG is released.

   During the fall teps of relay RG2, which has a delayed action, in fig. 3, a current pulse and sent into the following current circuit: most, passing through contact 45, contact 25, contacted them 156 and 95 in fig. 2, the wind-
 EMI10.6
 ment of relay RF1, the winding of relay Ri2, contact 63, the minus. The RF1 and RF2 relays attract their armature and a signal is sent over the trunk line to the office
 EMI10.7
 start of communication. This signal means that the communication cannot be established.



   2) In case a free communication is found
 EMI10.8
 in the direction corresponding to the bar magnet STM1, the course of the reohersb is interrupted at contact 32 because the relay RG3 attracts its armature, and the magnetic bridge which has
 EMI10.9
 connected to the free communication 11ne, is maintained in a magnetic circuit already described, via the contact 31. When the bar magnet STMI attracts its armature, the RG7 relay receives current through its winding,
 EMI10.10
 attracts its frame and connects ioaaieneni via contact 71. Contacts 78, 73 and 74 are actuated.

   Since the two contacts 33 and 78 open, the relay RRl at the

 <Desc / Clms Page number 11>

 fig. 4 drops and the recorder is released as under 1). During the ohute time of relay RG2, the current path is zero. the front remains closed according to fig. 3: the most, through the
 EMI11.1
 resistor r6, contacted them 74, 34 eti 8.p eea contacted 156 and 95 in fig. 8, the winding of the relays the contact 63, the less. Relay RF1 attracts its armature, but relay RF2 is not actuated. A signal of the current frequency
 EMI11.2
 alternative fl is sent by the 8 wires a2 and b2 of the trunk line to the station from which the communication starts.

   This signal means that the local network corresponding to the interurban number has been reached and that the local number must be transmitted from the originating station.



   3). In the event that a free communication line is found when reoherohe in a direction of cor-
 EMI11.3
 responding to one of the STLIE-8T1d10 bar magnets, the RG3 relay (fig. 3) reacts. Assuming that the test of a trunk line continues according to fig. 2, the following current path is formed: the plus, the RG3 relay winding, the
 EMI11.4
 multiple contact in the GV group selector, the wire o, the rest contact of the stop button BE (lig. 8), the contacts 155, 142 and 118, the winding of the relay RFl, the contact 53 towards the minus and in parallel with this circuit by the inter-
 EMI11.5
 contact mediary l & 2, resistanoe r8, contacted them 141, 154 and 63, and the less. The relays 8G3 in fig. 3 and RF1 in fig. 1 react.

   According to fig. 8 the following current path is formed: the most, passing through contact 158, contact 138 or 144, contact 17, the winding of relay RF12 which has delayed action, contacts them 143 and 95, the winding
 EMI11.6
 element of relay RF1, the winding of relay RF2, contact 63, the minus. In this current path, the armature of relay R72 is held Jugou9 until relay RF12 has attracted its armature, while relay RF2 is not actuated. It follows that the RP12 relay is forced to complete the connection process so that a call signal will always be followed by an end of communication signal as described below, even if the connection process test had to be interrupted.

   When the RF12 relay attracts its armature, one of the test current paths is interrupted at contact 122 and the relay
 EMI11.7
 RF12 is only connected in series with test relay RG3 (flg. 3) via contact 83 (f1g. 2) b of the auxiliary winding. At the same time, the contact 126 is closed and the relay RF14 receives current in its own winding, attracts its armature and SE locally connected by the inter-
 EMI11.8
 middle of contact 1450 in series with resistor r3, In addition @ the second of the current circuits of easy Parallel @ ,,,

 <Desc / Clms Page number 12>

 is interrupted at contact 142 and the relay releases its armature.
 EMI12.1
 during the reaction time of relays RF12 and RF14, there is thus a call signal with the alternating current frequency
 EMI12.2
 fl on the line wires az bZ.

   At the same time as the contact 126, the contact 127 ae closes and one of the windings of the relay RF13 receives power. The relay RF13 attracts its armature and the electrolytic capacitor K1 connected in parallel with the winding of this relay, is charged through a protection resistor.

   Because of this the contact 131 is opened so that the relay RF15 cannot be actuated by signals directed back from the line, and a trip signal is prepared through the contact 134. In addition, the RF5 relay attracts its armature in the following path of the current connected in parallel: the plus, the winding
 EMI12.3
 the relay RF5, the winding of the reactor D, the rectifiers Re, and Rez, the wires a and b (on the left in fig. z), the contacts in the HS group selectors (fig 3), the contacts 21 or 22, the resistors respectively r9 or r10, the less. Contacts 51-57 (pin 2) are actuated.

   When the RG3 relay (fig. 3) attracts its armature, the search process was interrupted at contact 32, and the magnetic bridge which had been left open the free communication line, is maintained in a current path passing through. contact 31. Contact 33 opens, but the current path of the relay
 EMI12.4
 RG2 passing through contact 72 is maintained until the recorder REG has emitted the received digits again.



  When the training operation starts in the HS group selector, the RR7 relay (fig. 4) attracts its armature as described above.



   Contact 73 closes, causing relays RR10 and RRll to be blocked in the position they currently have. Relays RR10 and RR11 receive current through the
 EMI12.5
 wires TKC1 and TKC2 of current paths which, in fig. 2, correspond to TKC1. If a trunk line is free, this is marked by the following current path: the plus, passing through contact 161 (fig. 2), contacts 113, 87 and 149, the rest contact of the blocking button, the common TKC1 wire for all trunk lines. who belongs
 EMI12.6
 In the same direction of traffic, the winding of all relata RR10s (freeze 4) connected in parallel, the least.

   As long as a line is free in the direction of traffic
 EMI12.7
 corresponding to the TKC1 wire, the plus is therefore connected to the TKCl wire, and the armature of the RR10 relay remains attracted in all
 EMI12.8
 REG registrars. In the event that contact 73 does not close while

 <Desc / Clms Page number 13>

 the RR10 relay is still energized, the relay is kept energized (magnetized) by current, via contact 104, by an auxiliary winding. If the RR10 relay should have let go of its armature when contact 73 closes, the relay is energized by current through contact 103 and that through a linear winding, which acts against it. of the working winding of the relay, of the aorta that it cannot attract in the path of the current passing through the TKCI wire.

   This latter auxiliary winding is, however, not able to actuate the relay, so that the armature of the oelui-oi retains the deoonaected position. The RR11 relay works in a similar way with the RR10 relay. The set-up current path to the GV group selector for the combination of digits 48 normally passes through contact 102; however, if all lines in the direction of traffic which indicates the communication from contact 102 were to be busy, relay RR10 would drop its frame and the number combination 48 would establish communication in the direction of traffic corresponding to contact 101 .

   This means that in the event that all lines from station 36 to station 461 (Fig. 1) are busy, calls from station 36 to stations 4el- 489 would be routed through station 399.



  Likewise, relay RRll switches the combinations of digits 33 and 34 from contact 114, which is connected to the rod magnet STM2 (fig. 3) and refers to combinations of digits 50-59 and 30-2 and 35, to contact 113, which as one can imagine it is for example connected to the bar magnet STM6 and relates to the combinations of digits 46, 47 and 19, At the same time, the relay RRll switches the combinations of digits 40 -45 from the direction of traffic corresponding to these, and which is indicated by the communication starting from contact 112, towards the direction of traffic corresponding to contact 111 and combinations of digits 46, 47 and 49.



   After the choice of the direction of traffic and the flow in that direction has been made, the relay RR7 drops off as described above and hence also the relay RR9, whose current path is cut off at contact 72. The RR9 relay is delayed action during the fall, so that the call signal through the line chosen by the GV group selector and the recorder connection towards the rear end of said line, have the times to be established before the current pulse emission as described below begins.

   The following current path is fef-

 <Desc / Clms Page number 14>

 me: plus, passing through contact positions 1-10 of contact blade 1 in recorder selector RV2, to which the recorder selector has been brought, contacts 92, 83, 52 and 42 , the winding of relay RR3, the less.

   Relay RR3 attracts its armature and activates contacts 31-34.The following current paths (circuits) are formed:
1) most, passing through contact 61, contact 31, contact III in the RS finder, contact 56 of relay RF5 in fig. 2 (communication goes to fig. 3), wire B, multiple contact in the GV group selector (fig. 3), wire B to the trunk line occupied by the GV recorder selector and executed, on admits it by hypothesis, according to fig. 2, the contact in its relay RF5, the contact 121, the gold-bearing of the relay RF2, the contact 63, the minus.

   Relay RF2 attracts its armature and thus passes in the line of the alternating current of frequency f2,
2) most, passing through contact 32 (fig. 4), contact 21, resistor rll, contact IV in the RS finder, the multiple contact in the group selector GV (fig. 3), the wire d to the trunk line occupied by the GV group selector and, assuming it is assumed, executed as in fig. 2, contacts 124, 133 and 95, the winding of relay RF1, the winding of relay RF2, contact 63, the minus.



  The relay RF1 reacts, but the relay RF2 is not actuated by this current path and this as a result of the resistor rll, and the alternating current of the frequency fl is sent on the line.



   3) the more, passing through contact 34, I winding the magnet MV3, the less. The RV3 recording selector reacts.



   4) the more, passing through contact 33, the winding of relay RR4, the less. Relay RR4 reacts and cuts off at contact 42 the current path of the coil of relay RR3.



  Relay RR3 is however a little delayed during ohute, due to resistor r12, which is connected in parallel with the relay winding.



   When relay RR4 reacts, the winding of relay RR5 receives current, via contact 41, and relay RR5 reacts, which causes contact 52 to open. When relay RR3 releases its armature, all the circuits 1-4 ceorite above open to you. The pulses of alternating current of frequency fl and f2. passing through the line occupied by the recorder selector GV. are interrupted, the selector

 <Desc / Clms Page number 15>

 group RV3 puts its brush holder balance in position 1 and the RR4 relay releases its armature.

   The circuit of the relay 'RR5 winding is opened by the contact 41, but the RR5 relay is a delayed egg during the ohute, due to the resistor r13, which is connected in parallel with the relay winding. , so that a short pause takes place before contact 52 is closed and the next current pulse can be started with the help of relay RR3. The RV3 recorder selector moves * by one step for each current pulse from contact 34.

   When the group selector reaches a position corresponding to the setting of one of the recorder selectors RV1 and RV2, one of the following circuits is formed:
1) when the position corresponding to the setting of the RV1 recorder selector is reached: plus, passing through the contact on contact blade 1 of RV1 (for example xxx position 2) corresponding to the eontect on contact blade 2 on RV3 (position 2), the winding of relay RR2, the minus.



  Relay RR2 attracts its armature and is connected locally with the help of contact 22, by closing the following circuit: the plus, passing through the contact in the zero position group of recorder selector RV1, contact blade 3 in positions 1-10 of selectors RV3, contact 22, the winding of relay RR2, the minus. Contact 21 opens and the flow of current pulses of the alternating current frequency fl is interrupted according to the description given above. Contact 23 opens.



   2) when the position corresponding to the setting of the RV2 recorder selector is reached: plus, passing through the contact of contact blade 4 of RV2 (for example position 10), the contact corresponding to the contact of the contact blade 1 of RV3 (position 10), the winding of relay RR6, the minus.



  Relay RR6 reacts and is connected locally using contact 62 and an auxiliary winding. Contact 61 opens and the emission of current pulses of alternating current frequency f2 is interrupted. Contact X 63 opens.



   When both contact 23 and contact 63 have been opened, the current is interrupted in the winding of the magnetic bridge BRNU, and BRMI falls. Contacts I-VI in finder R6 open and REB recorder is released. Relay RR1 drops and contacts 11-13 and 15 close. It closes, passing through contact 11, the contact in the group of positionso of the RVI recorder selector and contact, '. locally connecting, from the MVI magnet, an oirouit for the winding of the MVI magnet, which causes the RVI selector to move in a circle to its starting position (position 0). Of the same     @

 <Desc / Clms Page number 16>

 In this way, the selectors RV2 and RV3 are returned to their starting position3, when the contacts 13 and 12 close.



   When two lines are connected together through the multiple contacts of the GV group selector, the A wires are connected together. If the two lines are of the same type, for example if they are carried out according to FIG. 2, there is no change which takes place in the connection of the wires A between them. if however an inter-urban line delon the fig. 2 is connected with a communication line, without amplifier, the following circuit is established: the plus of wire A in the line without amplifier, the multiple contact in the GV group selector (fig. 3) , wire A, contact 53 (fig. 2), the winding of relay RF3, the less.

   The devices of the line where an amplifier is missing can correspond in all points with the devices RF5, D, Rel and Re2 (fig. 2), with the difference that the contact 53 is connected at most by means of a resistance instead of being connected at least by one winding of relay RF3, said resistance being able to be adjusted with advantage in such a way that it can also be used for adjusting the amplification during the interconnection of two lines which lack clean amplifiers, through a cord amplifier.

   In the interurban line according to fig. 2, the relay RF3 attracts its armature as a result of the closing of the circuit described above and is linked locally by closing the following circuit: the more the winding of the relay RF3, the contact 31, the contact 162, the less. If the trunk line according to fig. 2 came to be occupied by a GV group selector according to FIG. 3, the contact 162 in the oirouit described is not closed; instead contact 135 is closed. When the RG recorder is released, the RG2 relay (fig. 3) releases its armature and contacts 21-23 open. Relay RG3 releases its .nature contacts 61 and 63 open and contacts 62 and 64 are formed. Relay RF5 (fig. 2) releases its armature and contact 57 closes.

   The following circuit is closed: the most passing through contact 57, the winding of relay RF4, contact 31, one of contacts 135 and 162, the least. Relay RF4 attracts its armature and disconnects by means of oontaots 41-46, the extension of the LF line. In case the trunk line according to fig. 2 was connected with another trunk line with its own amplifier, the RG7 relay (fig. 3) did not attract its armature, and consequently the signals between the. lines are not repeated, by relays RF6-RF11, but go through one. communication d. Conversation. In case the li-

 <Desc / Clms Page number 17>

 interurban gne according to fig. 2 was connected with a ligt without its own amplifier, the signals are repeated as below:

      
1) Alternating current frequency signals fl actuate relays RF6-RF11 solon the connection operation during the call, which produces the closing of the following circuit more, passing through contact 94, the resistance rl, contact 172, the winding of relay RF17, contact 156, contacts 24 and 73 (fig. 3), the multiple contact in the GV group selector, the wire, at least through the current pulse receiving devices in the equipment occupied by the GV group selector.



   2) Signals at alternating current frequency f2 only actuate relay RF7 and have no effect.



   3) Signals with the two alternating current frequencies fl and f2 activate the two relays RF6 and RF7, thus closing the following circuit: the plus, the winding of the relay RF3, the contact 72, the minus. Relay RF8 attracts its armor and contacts 81-88 are actuated. Contact 82 turns on an auxiliary winding, connected in parallel with the working winding of relay RR8 but working in opposition, and which, when contact 72 opens, will cooperate with it, so that the relay RR8 is delayed on fall but quick to react.

   Contact 84 closes the following circuit: the plus, passing through contact 94, contacts 84 and 172, the winding of relay RF17, contact 156, contacts 24 and 73 (fig. 3), the multiple oontaot in the HS group selector, wire d to minus, via a signal receiving relay for the line that the HS group selector has chosen. In the event that this line is an interurban line, executed according to fig. 2, and that the signal would be emitted by a line without an amplifier, the none circuit would last be closed passing through wire d (on the left in fig. 2), contacts 124, 133 and 95 , the winding of relay RF1, the winding of relay RF2, contact 63, the minus.

   The relays RF1 and RF2 would then attract their armature, and a signal at the two alternating current frequencies f1 and f2 would be emitted by the trunk line.



   It is assumed on the assumption that as long as the connection operation for the establishment of the call is taking place, the telephone sets (i.e. XXXX conversation) of the subscribers are not connected to the telephone. communication, so that the frequency signals cannot be disturbed by conversations. When communication

 <Desc / Clms Page number 18>

 is established, it is presumed that the situation of the called subscriber's line is signaled to the originating station by means of trumpet signals which cannot be activated by signal receivers M1 and M1 (fig. .



  2). It is further assumed that all signals which are necessary for the completion of the connection process have only the frequency f1. according to the signal directed in ar-
 EMI18.1
 rière described above, which, at the ;;. euc,; l'-tlx'O! 1 of the PEG register at the station from which the communication originated, was transmitted as a sign that the local number should be transmitted.



   It is accepted here that the connection operation is carried out in such a way that the called looale station, when the communication reaches the line of the called subscriber, sends a signal to the originating station of the communication, which signal causes the connection of telephone devices
 EMI18.2
 (CteBt ie conversation) subscribers calling the ooi, .munication.

   The originating station of the ocmnunioation then responds with a signal, which is repeated by the interurban lines with amplifiers using the two frequencies fl and f2 and which marks, on the one hand, that the communication is an interurban communication. , and, on the other hand, ocmmute the
 EMI18.3
 The equipment according to fig. 2 so that only signals of the two frequencies f1 and f2, and exceeding a determined duration can be repeated by the signal transmitters. Likewise, a similar signal is sent from the called local office to the originating station of the communication when the called subscriber is connected to the communication,
 EMI18.4
 that is to say when he lifts his horn (manual device).



   As emerges from the above description, during the connection operation described there is in no case sent a signal at the two frequencies f1 and f2 which is repeated in the circuit described last. If such a signal were to
 EMI18.5
 to happen, that would mean, according to the assumption made above, that a telephone device. been connected to the communication. A short signal in the direction of the call with the two frequencies fl and f2 closes the next circuit, already
 EMI18.6
 mentioned: 10 plus, contacts 04, 84 and 172, the coil of relay RF17, contact 158, contacts Z4 and 73 'P ÎiÉÉÎIÎ $ "d / oÎÎÉ CV, wire 8 a relay, from receiver to current pulse in the line interrupted by 1..GY group selector.

   The two-stage relay R117 then attracts its armature over a corresponding distance. on the first floor and contact 174 is closed.



    The following circuit. 'Establishes: the plus, passing through the contact 83, the contacts. 173 and 174 resistance rll, the @

 <Desc / Clms Page number 19>

 contact 162, the least. Contact 83 holds an auxiliary winding of relay RF17 connected to this circuit in short-circuit.



    After the end of the signal, when the relay RF8 releases its armature, this short-circuiting ceases and the relay RF17 attracts its armature xxxx over the distance corresponding to the second stage because of the current flowing through the auxiliary winding. Contacts 172 and 173 open.



   A short signal from the local office called to the starting station of the communioation at the two frequencies fl and f2 closes the following circuit: the plus, passing through contact 94, contacts 84 and 172, the winding of relays RF17, contacts 133 and 124, wire d on the left in fig. 2, at least through the current pulse receiver relay in the device which occupied the trunk line. Relay RF17 reacts as described above.



    After the two subscribers have been connected to the communication, the armatures of the relays RF17 are therefore drawn into the line equipment (usually two) according to fig. 2, which introduce or close the series of interurban lines connected in series with amplifiers and receivers of frequency signals which enter the telephone connection. Signals which originate after this and which contain only one of the frequencies f1 and f2, could not be repeated, since contact 172 is open. Signals at the two frequencies actuate the two relays RF6 and RF7, thus closing the following circuit: the plus, passing through contact 71, contact 171, the winding of relay RF18, contact 61, the minus.

   The RF18 relay, which has a delayed pull and drop action, attracts its armature in case the signal is long enough. After that, the RF18 relay matures remain attracted for some time after the start of the signal, and during this time signals having only the frequency fl can be started and repeated, since the circuit which was interrupted by contact 172, is now closed. via contact 182. Relay RF18 holds its armature as long as the signal lasts, and this by means of contact 181 which is connected locally.



   In the event that a long signal at the two frequencies fl and f2 arrives, the relay RF11 has time to let go of its armature for the duration of the signal. In this case, all the contacts 81, 91, 101 and 111 remain open simultaneously, breaking the retention circuit of the relay RF15 and releasing the matur. of this relay. This means that the communication link has been disconnected.



   When the signal ceases, the following circuit is closed: the plus, ei

 <Desc / Clms Page number 20>

 passing through contact 161, contacts 113 and 86, the coil of relay RF2, contact 63, the less. This circuit is closed only for the duration of the fall of relay RF8. During this time, a signal of the alternating current frequency f2 is transmitted over the trunk line. The purpose of this signal is to check if the line and its equipment are free from faults, unoccupied and in working order, and it activates the equipment at the other end of the line according to the description below.



   If the test circuit passing through the wire a on the left in fig. 2 is interrupted, relay RF12 releases its armature and the following circuit closes: the plus, passing through contact 125, contacts 133 and 95, the winding of relay RFl, the winding of relay RF2, contacts them 63 , the least. This circuit is closed only for the duration of the output of relay RF13. The circuit of the relay RF13 is cut in the contact 127 and the relay holds its armature until the charge of the electrolytic capacitor K1 is exhausted.



  Relay RF14 remains energized by current flowing through contact 145 and resistor r3. After the end of the disconnection signal, the aforementioned test signal arrives from the line, thus indicating that the line and its equipment are intact, free and able to function.

   so
Relays RF7-RFll react / and the following circuit closes the most, passing through contact 158, contacts 132, 18, 88 and 114, the coil of relay RF14, the least The coil of relaia RF14 entering this circuit acts against the second winding of the RF14 relay and produces a much stronger magnetic field than the latter, so that the RF14 rail releases its armature and attracts it again after the magnetic field in the relay changes direction. The if, - don't! test is not long enough to give the RF11 relay time to release its armature during the signal. At the end of the signal, the RF1-RF9 relays release their armatures.

   Relay RF14 releases its armature when the magnetic chap wants to change sounds, when contact 08 opens. After that, the RF11 relay also releases its armature, after which the line is free for a new call.



  If no co-control signal came from the trunk line, the RF14 relay armature would remain attracted and the line marked "coouped", because the $ contacts 141 and 142 are open. The next circuit is closed; the least, passing through the contact 163, the oontaot 148, the winding of the relay RF13, the. contacts 128 and 115, to a transmitter slide. pulse $ current that connects most to the pulse wire to

 <Desc / Clms Page number 21>

 equal intervals and for a time corresponding to the duration of a trigger signal. Each time the plus is connected to the imp wire, the RF13 relay attracts its armature and a trigger signal is emitted.

   This operation lasts until the arrival of a test current pulse and loosens the armature of relay RF13, or until a inrush current pulse arrives from the line, what quifait that the relay RF11 attracts its armature and that the contact 115 opens, so that the relays RF15 and RF16 attract their armatures and that the contact 135 opens.


    

Claims (1)

CLAIMS, 1. Device for automatic telephone installations for the transmission of the arrangement of digits in a recording device of an interurban telephone exchange to another recording device or another interurban telephone exchange by means of trains current pulses which correspond to the digits indicated by the digit arrangement of the first-mentioned recording apparatus, characterized in that two or more ohdigits are transmitted simultaneously and by means of alternating current pulses of different alternating current frequencies, each alternating current frequency indicating a place in the arrangement of digits, however that the number of current pulses of the same frequency of alternating current indicates the value of the figure, which takes the place indicated by the frequency of alternating current, 2. Device according to claim 1, characterized in that signals which are sent between two long distance telephone exchanges and which relate to the connection process during the establishment of a call, but not to the transmission of the arrangement. of digits thereof, consist, before the connection of the conversational devices to the communication, of alternating current pulses of a single frequency of alternating current, and, after the connection of the conversational devices to the communication , consist of current pulses consisting of a combination of at least two alternating current frequencies. 3. Device according to either of claims 1 or 2, characterized in that when connecting a conversation device to a telephone call, it is sent from the station where the aforesaid connection takes place, a signal that activates the receiving devices entering the communication for the. acoustic frequency signals, and this at frequencies, of alternating current included in the band <Desc / Clms Page number 22> oonversation, so that after the end of the signal, only signals oonsisting in a combination of at least two alternating current frequencies and of a duration exceeding a determined given duration, can be transmitted in the direction of the signal. 4. Connection device according to claim 1, charac- terized by devices or apparatus for telephone communication lines provided with amplifiers and line balancers, apparatus which, when connecting a par- ter. line to a recording device are actuated by means of a signal on one or each of the two conversation wires, such that at least one of the conversation wires and of the balancing wires entering the telephone communication - nique is connected, in the incoming communication, to the recording device and, in the outgoing communication, to a relay RF2 for the transformation of the continuous current pulses emitted by the recording device into pulses of alternating current. 5. Connection device according to either of claims 1 and 4, characterized in that one of the communication and balancing wires entering the inter-urban communication is connected to a communication device. relay, which is actuated in such a way that it switches off a damping device interposed in the telephone communication, when the line is connected with another line for which the corresponding wire is switched, when reconnecting the other aforementioned line to the recording device, on a device capable of marking that the last line has no folder 6. Connection device according to claim 1, characterized in that the recording devices are connected to communication lines through which calls have arrived, and this by means of relay selectors in which the connection process is initiated by an electromagnet connected in series with a discharge tube and whose magnet is actuated when the discharge tube is ignited, and in that said discharge tube is switched on in series with a resistance common to a group of recording devices. 7. Connection device according to claim 1, characterized in that the communication lines are connected to group selectors which are composed of relay selectors and are controlled by recording devices the connection process being initiated by. two electromagnets connected in series, one of which belongs to the recording device and the other to the group selector, and in that the two aforementioned electromagnets are actuated in series with a <Desc / Clms Page number 23> EMI23.1 dohargaa tube which is allnal in series ano a resintaue ooemn to a gem9o edlootmre ermpe. e. as pwtioulior, set nonlimiting # read of the embodiments of the invention as * aent dierite above vosaa a * q1ee, with r4f <r <ne <aooz daraiaa oi-ana 6 and such as * mounted illurtra by ose lasto