BE465122A - - Google Patents

Description

       

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  Improvements to automatic or semi-automatic telephone systems.



   The present invention relates to improvements in automatic or semi-automatic telephone systems and more particularly relates to systems in which a permanent recording, automatically, of the details of a call. In systems of this kind, while the general aim is to eliminate the service of an operator, there are cases in which the service of an operator is essential and the object of the present invention is to provide facilities. which work in conjunction with the equipment used to establish and record calls, to enable these various additional manual operations to be carried out.



   According to a feature of the present invention, storage arrangements are provided to allow the recording of the details of a call and when the calls are established from an operator station, use is made of certain features. storage devices to allow the establishment of the call while at the same time the recording of the call is prevented.

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   Another feature of the invention relates to the use of means by which an operator can be called by a subscriber and required to establish the trunk call. This means contains a special conversour recorder, controlled by the operator, allowing her to set up the call by routes which are also used for automatic recording.



   Another characteristic of the invention relates to the use of means for producing a signal to an attendant, indicating to her the number of the calling party, and enabling her to control the establishment of a call in the event that the assigned junctions to charge registration calls are all busy.



   The invention will be better understood on reading the following description taken together with the appended drawings comprising FIGS. 1 to 24-. These drawings should be arranged as shown in fig. 25.



   Among these drawings, FIG. 1 shows the layout of part of the equipment located at the particular area office where the automatic recording of the details of a call is made. Provision has been made in FIG. 1 a number of switches of which IS is an example and one of these switches is taken in service when a call is to be established to another area or to an operator. Only one of these switches has been shown for the sake of simplicity of the drawing, but it goes without saying that the other switches are reproductions of the IS switch. The IS switch has access through the tenth stage to special service selectors such as SS, calls made through this switch being handled by an operator.

   Through stages 2 and 5, the IS switch has access to the equipment to establish inter-zone calls and to automatically record the details of the call. It goes without saying that although stages 2 and 5 are shown linked together for simplicity, they can in fact

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 have access to the different groups of a similar device. This equipment comprises a group of relays RG which responds to a digit transmitted to it from a recorder-converser which controls the establishment of the communication, this cipher causing the group of relays RG to be chosen. an appropriate quality of anointing line by means of a finder switch such as F2.

   Switch L2 has access to charge line control circuits such as TLCC which are each permanently associated with a particular trunk or charged line. The digits representing the number of the called party are transmitted to the metering line control circuit and are stored therein, and also repeated by the switch CF to the recorder-converter 0 which in response to these digits, used to establish communication with the called subscriber.



  Further information about the call is encoded to and stored in the metered line control circuit. The charging line driver is also used to measure the time of the call. When an effective communication is released, switch 0F searches for a printer controller such as PC to which all information is transferred from the charging line control circuit, which is then released with the line. junction. Other information is also transferred from the DTU date and time unit to the controller-printer, which determines the total price of the call and takes a PT printer into service using the PF switch and causes the printing of information on a ticket by the PT mechanism.

   Recording is also done for non-effective calls by the PT1 mechanism under the control of the controller-printer PC1.



   If, however, a trunk line is not available, communication is extended by the last position of switch F2 by the group of relays RG1 towards the group.

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 RG2 relay. The relay group RG1 determines whether the call is of sufficient importance to warrant the intervention of an operator or whether its busy tone must be returned to the 1 calling participant. In the first case, the group of relays RG2 causes the lighting of a call lamp to an operator station such as OP. In addition, the relay group RG2 causes the switch Fl to search for a free calling number register CNR on which the number of the calling party is stored.

   When an attendant answers, the F4 switch searches for the set, and the calling number is displayed on a panel at the set. The attendant then takes the details of the desired number and the call is released.



  The operator then tries to establish communication; for this purpose it uses an RT recorder-converter by means of the RGTF and RTF searcher switches and the RGT relay group. The set of KS keys is then associated with the recorder taken into service by means of the KSF switch.



  She then establishes the required number on her set of keys and
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 The recorder-to-talker causes the RTGS switch to lift to the second or fifth floor, after which communication is established as described above except that as the attendant establishes the call, she takes the details. in the usual manner and it is therefore necessary to prevent the measurement of the time of the call by a charging line control circuit and also to prevent a printer-controller or paging mechanism. be taken into service.



   If we now come back to the IS switch, we see that through stages 1 and 4 the switch has direct access to the group of relays RG2 so that the call is directed immediately to the operator, the calling number being exposed. like before. This arrangement is intended to allow subscribers to have their long distance calls established for them by an operator if they so wish. The call

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 is set by the operator as described above.



   It should be noted that calls coming through the IS switch can be made by an attendant at a manual home office and in such cases the attendant takes the details of the call. Here again the charging line control circuit is prevented from performing its normal functions of measuring the time of the call and connecting a printer-controller and a printing mechanism. pressure.



  A detailed description will first be given of the circuit operations which take place when an inter-area call is automatically established by a subscriber or an operator at a manual home office. It will be assumed in fig.l that this call is extended by the selector switch IS to a group of relays RG shown in fig. 2. The RG relay group is intended to receive a digit transmitted from the recorder-talker to the originating office which determines the quality of the feature line to be taken in service, the relay group having access by means of switches F2 and F3 to trunk lines of different qualities.

   When the RG relay group is taken in service, the battery is extended by conductor 3104, the contacts associated with armatures 3071 and 3081, the winding of relay 3000, armatures 3045, 3056, 3064 to earth. The earth potential is also extended by the conductor 3105, the contacta associated with the armatures 3072 and 3082, the winding of the relay 3010 towards the battery.



   Relays 3000 and 3010 operate, and relay 3000 closes a circuit to armature 3001 for relay 3020 slow to release. Relay 3010 puts at armature 3011 the group of relays RG safe from a new outlet in service and at armature 3012 it closes a latch circuit, for relay 3020 from ground to earth. frame 3023.



  In addition, relay 3020, at armature 3021 places a new earth ground on conductor 3106.

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   The circuit is then in a state to receive the number to determine the quality of the trunk line which is to be used, the number 1 indicating that a lower quality, and the number 2 that a higher quality of the trunk line must be used. be seized. The pulses comprising this number are transmitted by interruptions by the conductor 3105 and when the relay 3010 is released for the first time, the earth is extended by the armatures 3023 and 3012, the lower and upper windings of the relay 3030, the springs out of range. normal 3102 and switch contacts 3099, coil winding coil 3098 to battery.



  The earth is also extended by armature 3043, the lower bearing of relay 3040 towards the battery. Relay 3020 energizes in the above circuit but magnet 3098 does not energize. Relay 3030 short-circuits armature 3033, its bottom winding, and armature 3034, it provides ground to maintain relay 3000 in the actuated state. Relay 3040 is a two phase relay and operates only%. this moment its armature "X" designated by 3042. When relay 3010 re-energizes at the end of the pulse, relay 3040 is fully energized by means of its two series windings, armatures 3042, 3052 and 3022 down to earth.

   It will be assumed that the received digit is 1 and accordingly at the end of the first pulse, relay 3030 releases slowly and if the contactors of searcher switch F3 are on contacts leading to a busy trunk line, the earth is extended backwards by the friction device 3093, the armatures 3076, 3031, 3041, the switch contacts 3099, the winding of the magnet 3098 towards the battery. This earth is also extended to a terminal of relay 3070, the other terminal of which is earthed by reinforcements 3044, 3035 and 3024.

   The wipers of switch F3 are thus rotated until a free junction line is found, after which relay 3070 operates in series with the magnet, which is not excepted.

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 and the conductors 3104 and 3105 are connected by the armatures 3071 and 3072 by means of the wipers 3090 and 3091 leading to the charge line control circuit associated with the chosen trunk line of the required quality.



   The charge line control circuit shown in Fig. 24 is similar to that described in Patent No. 434,799, and is not shown in detail, only parts of interest have been shown. The present invention. The metering line control circuit is taken in service by extending the battery through lead 67 and ground through lead 68, causing relays 33 and 35 to operate respectively. tively, which to the armatures 34 and 36 close a circuit for the slow release relay 37. The relay 37 closes to the armature 38 a clearly visible circuit for the relay 39, which, to the armature 40, closes a good circuit. visible for relay slow to release 41.

   In operation, the relay 41 completes to the armature 42 a circuit extending from the earth to the armature 27, through the armatures 30, 42,44, the switch contacts 70, the winding of the magnet 62 towards the battery. Magnet 62 is combined with a CF switch shown in FIG. 1 which has access to C recorders-converters and PC printers-controllers. As the present invention does not relate to the operation of these circuits, none of them nor the wipers of the CF switch have been shown in detail.

   It may be mentioned, however, that when the magnet 62 is energized in the above self-interrupting circuit, the rubbers of the CF switch are rotated in search of a free converter and when this occurs. produces relay 43 operates and armature 44 opens the circuit shown above for magnet 62. The charge line control circuit has now received coded digits in the recorder. converser of the home office and stores the figures on groups of storage relays which we have

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 shown as groups IV and VIII. The first digits received by the charging line control circuit and which will be repeated from the converser form the number of the called party.

   They include seven digits, the first two of which represent the zone of the called participant, the next two the office of the called participant and the last three the number of the participant called in this office.



   The pulses are received by the charging line command circuit by conductors 67 or 68, those transmitted by conductors 67 serving to control the advancement of the wipers of the IP switch and also to cause the operation of the relays. appropriate storage, while those received by conductor 68 control the advancement of the IP switch wipers only.



  The earth which is transmitted by the rubbers of the switch to cause the store of the called party number, to operate the store relays, is also transmitted by the rubbers of the switch Ci! ' to the converter to have these numbers repeated to it. The remaining information transmitted to the charging line control circuit is stored therein.



    When communication has been established to the called subscriber, the relay 21 in the charging line control circuit operates under the effect of an alternating current signal and at armature 22 it extends the earth through the armature 11, the upper coil of relay 10 towards the battery. Relay 10 is a two phase relay, it activates its armature "X" designated by 12 only at this moment but at the end of the signal it works completely and at armature 11 it prepares a circuit to operate the relay 13 This circuit is completed during the operation of the relay 21 under the effect of an alternating current signal which is transmitted when the called subscriber answers.

   Relay 13 is also a two-phase relay and only closes its arming in this phase.

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 ture "X" designated by 15. At the end of the signal, the relay operates fully and at armature 16 it closes a circuit for relay 17, which at armatures 18 and 20 causes the emission of the battery monitoring. reverse.



   The next operation of the metered line control circuits includes the measurement of the time of the call and this begins after a certain grace period, when the relay 29 is operating. Relay 29, when operating, locks to earth at armature 31, and at armature 32, it closes a circuit of time pulse conductor 69 through armatures 28 and 19, the winding of relay 25 towards the battery. Earth pulses at the rate of one every five seconds are transmitted by the conductor 69 and repeated by the relay 25, to cause the advancement of the switch not shown which is intended to record the duration of the call? When the calling participant hangs up his receiver at the end of the call, relays 33 and 35 are released, followed by relays 37, 39 and 41.



  The charging line control circuit however remains maintained because of a circuit which is not shown and when releasing the relay 41, the following circuit is closed: earth, the armatures 27, 30 in its actuated position, 42,44, the switch contacts 70, the winding of the magnet 62 towards the battery. The rubbers of the CF switch are again set in motion and this time in search of a free printer-controller and when this is found the relay 43 operates again to open the circuit indicated above to the armature 44. The stored information is then transferred from the charge line control circuit to the printer controller and when this operation is complete, the charge line control circuit is released.

   The circuits causing the release operations are not shown, as they will be understood from the patent mentioned above.

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   If the call is established by an operator, the time measurement and recording of the call is done by the operator and it is necessary to prevent the metered line control circuit from fulfilling these. functions. It is therefore necessary to prevent the relay 25 from being pulsed from the conductor 69 and also to prevent the closing of the second flushing circuit for the magnet 62. Group VIII of the relay groups d Storage is intended to store a digit which is indicative of the rate at which the call is to be billed, or indicative that the call is being established by a manual operator. In this last case the number is always the number 0 and referring to fig. 23 we see that only the fourth relay of the group is actuated to store this number.

   As a result, relay 26 only is actuated by slider 66. While operating, relay 26 prevents armature 27 from completing the second flushing circuit for magnet 62 and armature 28 prevents the chase. The completion of the pulse circuit to relay 25. As a result, measurement of the time of the call is prevented and no printing controller is taken in service at the end of the communication. Other circuit changes also take place which allow the release of the metered line control circuit as soon as the operator at the home office removes her plug from the jack.



   Returning now to the operation of the relay group RG, if all the lower quality junction lines accessible by the trotters of the switch F3 are occupied, the rubbers of the switch F3 are rotated to contact 25, where the following circuit is closed: earth, lower winding of relay 3060, armature 3046, contact 25 and wiper 3092, armatures 3073, 3031, 3041, switch contact 3099, winding of l magnet 3098 to the battery. Relay 3060 operates by this circuit but not magnet and at armature 3062 it pro-

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 runs along the 3024 armature earth through the lower and upper windings of relay 3050 in series, to the battery.



  Relay 3050 operates fully through this circuit to cause finder switch F2 to search for a higher quality free trunk line. In addition, at armatures 3063 and 3064, relay 3060 short-circuit and release, relay 3050 remaining held by armature 3053 towards the earth at armature 3052. If the wipers of switch F2 are on contacts ending in a free junction line, the earth is extended backwards by the wiper 3096, the armatures 3083, 3051, the switch contacts 3101, the winding of the magnet 3100 towards the battery.

   This earth is also extended to a terminal of relay 3080, the other terminal being earthed by armatures 3055, 3035 and 3024. If a free junction line is found, relay 3080 operates and connects the conductors. 3104 and 3105 to the reinforcements 3081 and 3082, by the wipers of the switch F2 to the charging line control circuit associated with the junction line. The subsequent phases in the establishment of the communication are then carried out in the manner described above. If no superior quality junction line is available, the wipers of switch F3 are rotated to contact 25, after which the RGI group of relays (fig. 3 and 4) is taken. in service.

   Relay 3080 then functions to connect conductors 3104 and 3105 and communication is extended by conductors' 295, 296 and 297 terminating in this group of relays. Relays 3000 and 3010 release when operating Relay 3080 and open the circuit for Relay 3020. Relay 3020 slowly releases and opens the latch circuits of Relays 3040 and 3050, which release.



   The earth is then extended by conductor 296,

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 the armatures 103, 162, the winding of the relay 110 towards the auxiliary battery -.- The connection of the auxiliary battery with the conductor 296 causes the change of the equipment of the original office for the manual establishment instead of automatic communication establishment. In operation, relay 110 closes to armature 111 a conspicuous circuit for slow release relay 120, which at armature 122 extends the earth back through private conductor 295, trotter 3096 and trotter 3096. armature 3083 to private conductor 3106. This operation occurs before releasing relay 3020.

   The relay 3080 is also maintained by this earth towards the battery by the winding of the magnet 3100. In addition, the relay 120 closes to the armature 122 and to the armature 121 the following circuit for the slow-to-go relay 130. release: the earth to the armature 272, the armatures 223, 101, 121, the winding of the relay 130 towards the battery. The relay 130 provides, to the armature 133, an additional earth to the private conductor and to the armature 132 it short-circuits the relay 120 which is released slowly.

   When releasing, the relay 120 opens to the armature 121 the circuit for the relay 130 which is released slowly and during the releasing period of the relay 130, the following circuit is closed: earth, armatures 272, 223, 101, 121 in its rest position 131, in its actuated position, the winding of the relay 160 slowly released towards the battery. While operating, the relay 160 closes at the armature 161 a circuit for the slow-to-release relay 150 and at the armature 162 and its normally closed contact, it opens the circuit for the relay 110 after which the auxiliary battery is disconnected. of the conductor 196 and to the armature 162 and to its actuated contact it connects the lower winding of the relay 170 to the negative conductor 292.

   Finally in the armature 163, the relay 160 connects the lower winding of the relay 180 to the positive conductor 297 by the armature 104. The relays 150, 170 and 180 are thus actuated and the relays 170 and 180

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 provide their armatures 172 and 183 with alternating locking circuits for relay 160. A back ringing sound is then transmitted to the calling party through the following circuit: sound conductor 292, armature 274, capacitor 291 , the armature 155, the upper winding of the relays 180 and 170 towards the earth, the sound being transmitted to the calling participant by induction by means of the lower windings of these two relays.



   The connection of relays 170 and 180 to leads 296 and 297 serves as a signal to a recorder-converter in the originating office to indicate that transmission of information stored therein can begin. This information, which is transmitted in code, comprises the number of the calling party and the number of the called party and a digit which represents the rate at which the call should be billed if the call was made by a subscriber, or the number 0 indicating that the call is established by an operator at a manual office.

   With respect to the code by which the information is transmitted, as indicated above, each digit is represented by a cycle of four pulses which produce the operation of different combinations of storage relays which are put into con. - nexion successively. In the circuit considered a single digit is stored and the storage group comprises relays 230, 240 and 250 and 260. The way in which these relays are actuated to indicate the different digits is shown in the table of fig. 23, relay 230 being relay 1 of the group.



   Consider first the case of a call that is made by the subscriber and assume that the recorder-talker at the originating office has determined that the digit 1 represents the rate at which the call is to be billed. The seven digits which represent the number of the called subscriber are transmitted first and since each digit comprises four pulses,

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 the wipers of switch S are advanced to position 28, at the end of the last digit, the nprmale position of the trotts of switch S being the last contact associated with the wipers of odd numbered numbers. These numbers are not stored in the RGI relay group. The next digit is the rate digit which should be the digit 1 and this is stored on the storage relay group 230,240, 250 and 260.

   Therefore, on the first pulse of this figure, which is a break pulse, by conductor 297, relay 180 is released. Relay 180 closes the following circuits to armature 182: earth, armatures 272, 223, 101, 121, 131, 151 where it divides, a path extending through armature 182, winding of l magnet 288 towards the battery to cause the magnet to energize in preparation for the advancement of its wipers towards position 29, while the other path extends through the armature 181, the wiper 287 on contact 28 winding relay 230 to the battery. Relay 230 operates and is locked by armature 232.

   At the end of the pulse, relay 180 is re-energized and magnet 288 de-energizes to move the wipers towards position 29. When the next pulse is received, relay 180 de-energizes again and it de-energizes it. relay 240 is energized by means of the wipers 287 on the contact 29 and is locked by means of the armature 242. The following two pulses are transmitted by the conductor 296 and cause the release of the relay 170 which at the armature 171 causes the excitation of magnet 288 only. The energization of the relays 230 and 240 has no effect in this case. At the end of this figure, the wipers of switch S are advanced to contact 32 where the earth is extended by wiper 285, armatures 271, 221, the winding of relay 100 towards the battery. .

   Relay 100 operates and is locked by means of armature 10? to the private driver 295; at armature 101, it opens the circuit indicated above for repeating the pulses and at armatures

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 103 and 104 it extends the conductors 296 and 297 towards the equipment shown in FIGS. 5 and 6. The effect of deci is to cause the calling number recorder (fig. 7,8 and 9) to be associated with the equipment of fig. 5 and 6 in order to receive the number of the calling participant, transmitted to the latter from the recorder-talker at the office of origin, and to display it in front of the operator. The operation of the circuits shown in these figures will be described in detail later.



   As a result of the operation of the relay 100, the circuits for the relays 170 and 180 are opened to the rest contacts of the armatures 103 and 104. The relays 170 and 180 release, followed by the relays 160 and 150. The relay 150 opens at. the armature 152 the latch circuit of the relays 230, 240, 250 and 260, those of these relays which were actuated then releasing to bring about the release of the relay 220 or 270 if either one is actuated. In addition, relay 150 closes armature 153 a self-interrupting circuit for magnet 288 by means of the coil of relay 140. Relay 140 operates in series with the magnet to hold the relay group. RGI occupied and to maintain the circuit for the magnet at armature 141 until it is open when the slider 281 reaches the normal position.

   Relay 100 remains maintained until communication to the attendant is terminated, at which time the ground is removed from the private conductor and the equipment can be used for another call.



   Certain inter-area calls are, owing to the proximity of the office of origin and destination, considered from the point of view of payment as local calls. The rate of payment for such calls is represented by the number 9, and they are not considered to be sufficiently important to justify an intervention of an operator if trunk lines are not available. If rate digit 9 is received, relay 250 operates and locks to

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 armature 252 and closes a circuit to armature 251 for relay 270.

   The relay 270 prevents the armatures 271 and 272 from operating the relay 100; at the frame 273, it opens the connections by the private conductor to the equipment of FIGS. 5 and 6 and at frame 274, it sends back the driver's busy sound from sound 293 to the calling subscriber.



  The intervention of an operator is thus prevented.



   If the call. is established by an operator at a manual office, this operator records the details of the call and instead of the number of the calling party the digit 0 is displayed in front of the operator. Such a call is indicated by the transmission of the digit 0 in place of the rate digit. In this case therefore, relay 260 is energized and latched by means of armature 262, and at armature 261 it closes a circuit for relay 220. Relay 220 operates and latched on. Using armature 222 to ground, armature 263, and armature 221, it opens one circuit and prepares another for relay 100.

   In addition, to the frames 224 and 225, it connects the relays 200 and 210 which are slow to release, to the conductors 300 and 299 respectively. This operates the equipment of figs. 5 and 6 to enter a free calling number register and when this operation is complete, the two relays 200 and 210 are actuated. A circuit is then closed from the earth on the trotter 285 on the contact 32, by the armatures 211, 201 and 192, the lower winding of the relay 290 towards the battery.



  Relay 290 is a self-interrupting relay and is used to advance the sliders from switch S to frame 191 and to control the transmission, to frames 193 and 194, from the digit 0 in code to the calling number recorder. . For this purpose it will be understood that a cycle of four pulses is transmitted, only the fourth of which is effective to operate a storage relay in the appropriate relay group in the number register.

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 appellant.

   For this purpose the contact 194, repeating the pulses, of the relay 190 which controls the operation of the storage relay is short-circuited by means of the wiper 283 for the duration of the first three pulses, that is to say. say while the slider 283 passes over the contacts 32,33 and
34, an impulse etént transmitted by the conductor 300 with the wipers in the position 35. When the number 0 has been transmitted, the wipers of the switch S are advanced to contact 36, after which the relay 100 is actuated by means of of the armature 221 in its operating position, the contact 36 and the wiper 285 towards the earth, and the connection is extended to the equipment of figs 5 and 6 and the various relays of the switch S are brought back to nor - male as described above.



   A description will now be given of the equipment shown in FIGS. 5 and 6 together with the equipment shown in fig. 7,8 and 9 which include the caller number recorder. When the earth is extended by conductor 299 from the RGI relay group of fig. 3 and 4, relay 330 operates and to armature 331 it extends. the earth back by the private conductor 298, and at the armature 332 it closes the following circuit: the earth, the armatures
376, 366, 332, the winding of the slow releasing relay 320 towards the battery. Relay 320 operates and armature
321, it closes a clearly visible circuit for relay 350.



   The wipers of switch F1 have access to the calling number recorders shown in fig. 7,8 and 9 and if the contacts on which the wipers are located lead to an occupied recorder, the earth is extended backwards by the wiper 433, the armatures 371, 364, 352, the switch contacts 432, the winding from magnet 431 of switch F1 to the battery. This earth is also extended to a terminal of relay 360, the other terminal of which is earthed by means of armatures 372 and 353. L (magnet 431 advances the wipers of switch F1 until a record is reached).

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 free tror is found, and then relay 360 operates in series with the non-operating magnet.

   Relay 360 completes at armature 365 a circuit for relay 340 through the contacts associated with armature 394, towards the battery on conductor 300, and at armature 366 it completes a circuit for independent relay 320. of relay 370. Finally, the relay 360 extends to the armature 364 the earth through the armature 371, the wiper 433, the conductor 448, the armature 725, the winding of the relay 710 to the battery. Relay 710 which is slow to release operates, and at armature 713 it closes a clearly visible circuit for relay 660 (fig. 8).



   The equipment of FIGS. 5,6,7,8 and 9 is now in a state to receive the number of the calling participant or the digit "0" in code as appropriate. The pulses which are transmitted by the conductor 300 are repeated to the calling number register to cause the operation of the appropriate storage relay of the group assigned to the particular digit and also cause the advancement of the distributor switch D1. , while the pulses transmitted by the conductor 299 cause the advancement of the distributor switch only.

   By way of example, the case of a subscriber for whom the first digit of the number is 5 will be considered, with reference to the table shown in â. fig. 23, it can be seen that the second and the fourth storage relay of the particular storage group must be actuated. The first pulse is thus transmitted by the conductor 299, after which the relay 330 is released and to the armature 331, closes the following circuit: the earth, the armatures 311, 361, 382, the trotter 435, the conductor 450, the armatures 704, 682, the flow of the magnet 800 towards the battery. The trotters of the switch D1 are advanced 13 to position 2 and the relay 330 re-energizes.



  The second impulse will be transmitted by the conductor 300 and consequently the relay 340 is released and completes the following circuit: the earth, the armatures 341, 563, the wiper 434, the conductor 449, the armatures 706, 681, the winding of the

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 relay 670 to the battery. The relay 670 operates and to the armature 672 it extends the earth through the wiper 804 of the switch Dl on the contact 2, the winding of the relay 510 towards the battery; relay 510 is a second relay of the first group of storage relays comprising relays 500, 510, 520 and 530. Relay 510 operates and latch by means of armature 512 to ground to earth. 'reinforcement 661.



  Furthermore, the relay 670 closes to the armature 671 a clearly visible circuit to excite the magnet 800 and the wipers of the switch D1 are advanced towards position 3 and the relay 670 is then released at the end of the pulse. The next pulse is transmitted by driver 299 to advance the sliders of switch D1 to position 4 while the fourth pulse is transmitted by driver 300 to operate relay 530 by means of slider 804 and to advance the sliders to position 5 at the end of the pulse.

   The number 5 is then stored in the first group of storage relays. The second digit of the calling party number, i.e. digit 7, will be stored in the second group comprising relays 540, 550, 560 and 570 by the operation of relay 540 only, in a manner analogous to that described for the first digit . The remaining digits are stored in a similar fashion on the group of relays shown.



   When the last digit has been stored, the sliders of the Dl switch are advanced to position 21 and the earth is then extended by the slider 805 on the contact 21, the relay winding slow to release 690, the switch contacts 801, the winding of the magnet 800 towards the battery. The wipers of switch D are thus advanced automatically to contact 1 where the circuit indicated above is open. The relay 690 operates in series with the magnet and with the armature 691, the earth is extended from the armature 721 by the armature 701 towards the battery by means of the lower winding of the relay 700. The relay 700 is a relay

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 two-phase and only at this time aotionne its "X" frame designated by 702.

   In addition, relay 690 closes to armature 692 a circuit for the lower winding of relay 680 which operates and is locked by armature 683 to earth to armature 713 and to armatures 681 and 682 it opens, the pulse repeater circuits which extend from the equipment of pins 5 and 6 respectively to the relay 670 and the magnet 800. In addition, the relay 690, to the armature 692, also extends the earth by the armatures 724 and 705, the conductor 451, the wiper 436, the armatures 362,384, the upper winding of the relay 380 towards the battery. Relay 380 is a two phase relay and operates its "X" armature designated 385 only, at this time.

   When the switches of switch D are advanced to contact 1, the relay
690 releases and the two windings of relay 700 then energize in series by means of armature 702 to earth to armature 714. Relay 700 then operates fully. Likewise, relay 380 operates completely through its two series windings, armatures 385, 374- to earth at armature 354. Relay 380 closes armature 383 a circuit for lamps such as 453 which are provided. at each operator station, and at armature 381 it causes the transmission of the ringing sound back to the calling subscriber, by means of the sound conductor 437 and the capacitor 438 and thence by induction by the windings relay 330 and 340.



   The circuits remain in this state until one of the operators inserts the answer card such as Pl (fig. 19) of its lead circuit in the jack Jl. When this occurs the springs 442 are closed and the earth is extended by these, the winding of relays 390 and 430 towards the battery. When operating, relay 430 locks by means of its lower winding, armatures 432 and 354 to earth, and at armature 4-31 it opens the circuit to lamp 453. Relay 390 when operating, extends to the armature 392 earth by means of the upper winding of the

  <Desc / Clms Page number 21>

 relay 400, by the sleeve 441 of the jack Jl, the springs 1140 of the key K3 (fig. 19), the contacts of the armature 1013 towards the battery by means of the resistor 1155 in parallel with the lamp 1154.

   The upper winding of relay 400 has high resistance while the lower winding has low resistance. The relay operates by means of its upper winding in series with the monitoring lamp or the latter does not light up, / Relay 400, while operating, provides armature 405 with additional earth for relay 340 Furthermore, relay 390 reverses at fittings 394 and 395 the connection of relays 330 and 340 to conductors 299 and 300 to provide the necessary monitoring; at armature 393 it provides an additional circuit for relay 320, while at armature 391 it extends the earth through the upper winding of relay 370, armatures 384 and 362, wiper 436, conductor 451, armature 705, lower and upper windings of relay 730 to the battery.

   Relay 370 does not operate through this circuit.



   Relay 730, on the contrary, operates fully and at armature 731 it extends the earth through armatures 741, 756, switch contacts 803, the winding of magnet 802 towards the battery. The sliders of switch F4 are thus advanced in search of the indicator panel associated with the operator who answered the call.

   The advancement of switch F4 is controlled by an alternating current test circuit which extends as follows: the wiper 814 of the switch F4, the conductor 815 (fig. 9, 10, 17, 18 and 19), the armature 1025 and the operator's cord circuit, the secondary winding of the TRI transformer, armature 1026, the conductor
444 (fig.

   19,18, 17, 10 and 6) the springs 443, the armature
382, slider 435, conductor 450, armature 704, relay coil 740 and rectifier 742 in parallel, capacitor 743, armature 754 back to slider 814. When required indicator panel is found the re-

  <Desc / Clms Page number 22>

 lais 740 operates and opens the advance circuit to the 741 armature and its normally closed contact, while at the same armature and its working contact it closes a well visible circuit for the 750 relay The relay 750 operates and is locked by the armature 752 to the earth to the armature 713. At the armature 753 the relay 750 short-circuits to the lower winding of the relay 730.

   At armature 754 it opens the test circuit; to armature 757 it provides an additional restraint circuit for relay 710 and armature 755 it terminates the following circuit: earth, armatures 723, 755,761, the coil of the relay slow to release 770 towards the battery. Relay 770 operates and at armature 776 it closes a circuit for slow to operate relay 760; at the armature 775 it closes a circuit to excite the magnet 800 in preparation for the advancement of the wipers of the switch Dl to position 2.

   The relay 770 finally extends to the armatures 771-774, the wipers 806 to 809 by the wipers 810-813 and the conductors 816-819 to the wipers 970 to 973 of the distributor switch D2 associated with the indicator panel 11 shown in FIG. 10.



   Shorting the lower winding of relay 730 allows relay 370 to operate through its upper winding. This relay latches through armature 373 and at armature 371 it opens the initial guard circuit for the recorder which is now guarded from ground at armature 757, through armature 703 to conductor ¯ 448.



  At armature 372, relay 370 opens the circuit for relay 360 which becomes free, and at armature 374, it opens the interlocking circuit for relay 380 which becomes free. Relay 380, upon releasing, completes the transmission of the ringing sound back to armature 381.



   The indicator panel has been shown for simplicity with a series of lamps only and a series of storage relays. When the circuits mentioned above

  <Desc / Clms Page number 23>

 above to the indicator panel are completed, the armatures of group I of the storage relays in the recorder are connected to the group I windings of the storage relays of the indicator panel. In the example previously given, the first digit of the calling party number was "5" and therefore relays 510 and 530 are actuated.

   The earth is thus extended by the armatures 661, 512, the contact 1 and the wiper 807 of the switch Dl, the armature 772, the wiper 811 of the switch F4, the conductor 817, the wiper 971 of the switch D2, the upper winding of relay 910, the winding of relay 940 to the battery. The earth is also extended by the armatures 661, 532, the contact 1 and the wiper 809, the armature 774, the wiper 813, the conductor 819, the trotter 973, the upper coil of the relay 930, the nut - relay 940 to the battery. The relays 910, 930 and 940 then operate, the relays 910 and 930 locking by means of the armatures 911 and 931 respectively to the earth to the armature 951. The relay 940 closes to the armature 941 a circuit for the. magnet 974.

   Relays 910 and 930 close a circuit to ignite the appropriate panel lamp, the circuit in this case extending from earth through armatures 902, 913, 924 and 935 to lamp N 5 to give an indication to the lamp. operator of the first digit of the calling party's number.



   Returning now to the number register calling relay 760, when operating, opens at armature 761 the circuit of relay 770 which is slowly released. By releasing itself, relay 770 opens to armature 775 the circuit of magnet 800 which then de-energizes and moves the wipers of switch Dl to position 2 @ In addition, relay 770 opens to armatures 771 to 774 circuits extending to the indicator panels so that relay 940 de-energizes, relays 510 and 530 remaining held by their latch circuits. Relay 940 opens on arma-

  <Desc / Clms Page number 24>

 ture 941 the circuit of magnet 974 which de-energizes and advances the wipers of switch D2 to position 2.



    Finally, relay 770 opens at armature 776 the circuit of relay 760 which is released and again closes, at armature 761, the circuit for relay 770. Relay 770 fonotio @@@ then and at armatures 771 to 774 it extends the armatures of the logger's group II storage relays to the group II storage relay windings (not shown) of the indicator panel to cause the appropriate relays to operate therein, in a manner analogous to that described above. The transfer of the remaining digits takes place in an analogous manner and will not be described in more detail.



   When the fifth digit has been transferred from the calling number recorder, the Dl switch wipers are advanced to position 6. The earth is then extended by wiper 805 on contact 6, armatures 712, 794, 751, the upper and lower windings of the relay 720 towards the battery. Relay 720 operated and shorted its upper winding to armature 722; at armature 723, it opens the circuit of relay 770 and at armature 725 and its actuated contact, it extends the earth through conductor 448 to keep the recorder occupied and at its rest contact it opens the circuit of relay 710.

   The relay 710 opens to the armature 713 the locking circuit of the relays 680 and 750, which is released, and to the armature 714 it opens the locking circuit of the relay 700 which also releases. In addition, the relay 710 closes the armature 712 the following circuit: earth, the wiper 805 of the switch Dl on the contact 6, to the armature 712, the contact 21 and the multiplication of the fixed contacts associated with the wipers. 805, coil of relay 690, switch contacts 801, coil of magnet 800 to battery. The rubbers of switch Dl are thus advanced to position 7 or a new circuit with automatic interruption is closed.

  <Desc / Clms Page number 25>

 for the magnet 800 by means of the frame 711.

   While the switch is advancing, relay 690 is actuated and at armature 692 keeps relay 720 energized by means of its lower winding, the initial circuit for this relay having been opened at armature 751 when relay 750 is released. . Relay 690 is released when switch Dl has been returned to normal and is followed by relay 720. The recorder is then fully returned to normal and can be seized for another call.



   If the number "0" is received in the recorder from the circuit of fig. 5 and 6 relay 530 of storage relay group I is the only one activated. A circuit is then closed from the earth to the armature 531 by the armatures 521, 511, 501, 782, the winding of the relay 790 towards the battery. A circuit is now closed from the earth on the wiper 805 on the contact 5, the multiplication of the fixed contacts, the armature 792, the contact 21 and the multiplication of the fixed contacts, the winding of the relay 690, the switch contacts 801, the winding of the magnet 800 to the battery. The wipers of the switch are thus advanced until position 6 or a new circuit with automatic interruption is closed for the magnet 800 by means of the armatures 712 and 794.

   The trotters are advanced to position 7 where the front self-interrupting circuit is again completed and the sliders are rotated to position 21 where a new self-interrupting circuit, previously indicated, is completed to bring back. the wipers of the switch. During this return movement, relay 690 is actuated and at armature 691 * the following circuit is completed: earth, at armature 721, by armatures 691, 795, the upper winding of relay 780 towards battery.



  Relay 780 is a two-phase relay and operates only

  <Desc / Clms Page number 26>

 At this moment its armature "X" designated by 783. When the switch Dl is brought back to normal, the relay 690 is released and the relay 780 operates fully by means of its two windings in series, by the armature 783. to earth to armature 714. Relay 780 opens to armature 782 the circuit of relay 790 which releases.



   The appropriate indicator panel is then taken into service by means of the wipers of switch F2, as previously explained, and the digit "0" is transferred to the first group of relays stored on the panel. The trotters of the Dl switch are then advanced to position 2, following which the earth is extended by the wiper 805 on the contact 2, the armatures 731, 794, 751, the upper and lower windings of the relay 720 towards the drums. Relay 720 operates to initiate the release of the recorder, as previously described.



   The position, at this moment, is therefore that an operator has associated her cord circuit with the communication and that the number of the calling party or the figure "0" is displayed on the indicator panel. Referring now to the cord circuit, it should be noted that when the operator is on, the relays 1020, 1030 and 1040 are activated as a result of the operation of the relay 1130 when the OS equipment of the operator is fixed by the plug. Relay Il.30 causes the operation of these relays to the armature 1132. The relays 1020, 1030 and 1040, while operating, cause their various armatures to connect the circuits of the bead circuit.

   When the attendant is away from her station and her equipment is removed, relays 1020, 1030 and 1040 are released and a call arriving at this station is, when inserting the Pl file in the appropriate jaek, directed to a neighboring post by means of the fittings of these relays.



   If we assume that the operator is at her post, she then moves her listening key Kl to place her team-

  <Desc / Clms Page number 27>

   pement in communication with the calling participant. As a result of this operation, the earth at the springs 1146 is extended by the armatures 1035, 1101, the coil of the relay 1090, the armature 1036, the coil of the relay 1010 to the battery. Relays 1090 and 1010 operate and relay 1010, at armatures 1015 and 1016, extends the positive, ifet negative conductors through armatures 1045, 1046, 1082 and 1081 to the terminals of the windings mounted in series, of transformers TR3 and TR4. to close the conversation circuit to the equipment of the OS attendant.

   At springs 1170 a clearly visible circuit is closed for relay 1070 which at armatures 1071 and 1072 opens points in the conversation circuit extending through the calling plug P2, and at armature 1073, extends the battery resistance by the key K10, the fittings 1042, 1013, the spring 1140 towards the conductor of the sleeve to keep the relay 400 actuated.



   The attendant then asks for the number of the desired participant and notes the number of the calling participant on the indicator panel. It then informs the calling subscriber that it will establish the communication when a trunk line is available and asks him to replace his receiver, which releases the communication.



   When the calling subscriber replaces his receiver, the equipment in the original office and in the central office is freed and as regards the circuits shown, the loop through the conductors 3104 and 3105 (fig. 2). and from there through 296, 297, 299 and 300 is open. The relays 330 and 340 are therefore released and the relay 340 extends to the frame 342 the earth of the armature 404, through the armature 423 to the battery, by means of the winding of the slow-to-operate relay 410. . Relay 410 operates and locks to earth by means of armatures 411, 422, 421, 402, and to ar-. mature 412 it closes a circuit through the lower winding of relay 400 for lamp 1154.

   As a result of. the weak resistance

  <Desc / Clms Page number 28>

 tance of the lower winding of the relay 400, the lamp 1154 gives a weak light to indicate to the operator that the calling participant has replaced his receiver, after which she removes the plug Pl from the jack Jl.



   When the P1 plug is removed from the Jl jack, the relays 390, 400 and 430 become free, followed by the relays 410, 320 and 350. When releasing the relay 350 the earth is removed from the conductor 298, after which the relay 100 (fig.3) is released and also relay 3080 (fig. 2) while relays 1010, 1070 and 1090 in the cord circuit are released when the key K1 is restored to normal.



  The RGI relay group is available for use with another call upon releasing relay 100, while switches F2 and F3 of the RG relay group are returned to normal, after this circuit is (the new one available) for employment on another call.



     Finally, the operator closes it. key 978 (fig. 10) to activate relay 950. Relay 950 is locked by the armature 956, the springs 979, the switch contacts 975, the winding of the magnet 974 towards the battery.



  The magnet energizes in this circuit and the trotters of switch D2 are advanced to position 6 in which springs 979 are open. In addition, relay 950 opens to armatures 951 to 955 the latching circuits of the storage relays which become free and the indicator panel is then available for use for another called relay 950 releasing slowly when its interlock circuit is opened by springs 979.

   It is :. note that the contacts 6-10, 11-15, 16-20 and 21-25 are connected in multiple with the contacts 1-5 so that the switch Dl does not have to be returned to normal after operation. operation, the springs 979 opening in positions 1,6,11,16 and 21.



   Measures are also taken by which the calling subscriber can call the operator again by waving his

  <Desc / Clms Page number 29>

 hook switch. When this occurs, relay 340 (Fig. 5) is released intermittently and relay 410 operates on first release to faintly glow lamp 1154 as noted above. When relay 34Q re-energizes, relay 420 operates and locks by armature 421 and at armature 422 it opens the latch circuit of relay 410 which releases and opens the circuit to lamp 1154.

   The relay 420 finally connects to the armature 423 the earth interrupted by the conductor 446 to the relay 410 to cause the latter to operate intermittently and to cause the lamp 1154 to flick to attract the attention of the operator.



   When the attendant decides to establish the required communication, she inserts plug P2 of her cord circuit into jack J2 shown in fig. 17. The equipment shown in fig. 17 and 18 comprises the group of relays RGT with the two hunting switches RGTF and RTF, the latter having access to the recorders-conversers which control the establishment of communioation.



   Arrangements can be made for a signal to be given to the operator cord circuits when all charging lines are in service / which reduces the number of unsuccessful attempts to complete the call.



   When inserting the plug into the J2 jack, the earth is extended from the springs 1389, by the armature 1223, the winding of the relay 1200 slow to release towards the battery. Relay 1200 works by this circuit and in frame 1202 it connects magnet 1371 of the RGTF switch to the contactor 1378, If the contacts on which the contact points of the RGTF switch are located lead to a group of relays oc - cut, the earth is extended by the wiper 1378, the armatures 1213, 1202, the switch contacts 1372, the winding of the helper 1371 towards the battery.

   The rubbers

  <Desc / Clms Page number 30>

 RGTE switches are thus rotated until a free relay group is found, relay 1210 then operating in series with relay 1230, the first relay having been previously short-circuited. When operating, relay 1210 opens 1; armature 1213 a circuit for the magnet.



   The relay 1230, while functioning, to the armature, - 12.52 connects the magnet 1373 of the RTF switch to the trotter 1380. If the contacts on which the rubbers of the RTF switch are repositioned lead to an occupied conversation recorder, the earth is extended by the conductor 1396 and the trotter 1380, the armatures 1312, 1305, 1232, 1311, the switch contacts 1374-, the winding of the magnet 1373 towards the battery. In addition, the earth at armature 1233 is extended to one terminal of relay 1300 while the earth sent back by trotter 1380 is extended to the other terminal.

   The RTF switch then advances until a free recorder-converter is reached; at this time, relay 1300 operates from earth to armature 1233 by winding relay 1300, armature 1311, switch contact 1374-, magnet winding 1373 to battery. Relay 1300 operates only by this circuit and to armatures 1303 and 1304, it connects relays 2070 and 2080 of the recorder-converter to outgoing conductors 1403 and 1404 of the RGT relay group which leads to the group selector. RTGS shown in fig. 1. The circuit for these relays runs through armatures 2104 and 2105 of pulse relay 2100 in the recorder-converter.

   During the operation of the relays 2070 and 2080, a clearly visible circuit is closed for the slow release relay 2060 ii to release which, at the armature 2062, 3-closes a clearly visible circuit for the slow release relay 2050. In addition, relay 2060 extends to armature 2061 the earth of armature 2043 to relay 1650 which also operates. The

  <Desc / Clms Page number 31>

 relay 2050, while operating, extends to the armature 2052 the earth by the armatures 2021, 1977, the coil of the relay slow to release 2000 towards the battery. While operating, relay 2000 closes a circuit in the 2001 armature which is clearly visible for the 2010 relay which is slow to release.

   In addition to the 2003 armature, the 2000 relay extends the earth through the 1991, 1984 armor, the switch contacts 2198, the coil of the magnet 2197 to the battery. The KSF switch wipers are thus advanced in search of the group of KS keys belonging to the set where the operator inserted the P2 plug into the J2 jack.

   The test circuit for the KSF switch extends from the wiper 2232 through the conductor 1167 (fig. 14, 19 and 20), the key K7 in the operator's cord circuit, the armature 1025j l 'secondary winding of transformer TR1, armature 1026, conductor 1394 (fig. 20, 19,18 and 17), armatures
1211,1222, the trotter'1376, the frame 1242, the slider
1383, the conductor 1400 (fig. 18 and 15), the reinforcement
2002, winding of relay 1990 in parallel with rectifiers 2250 and 2251, capacitor 2252, armature
1978 back to the 2232 slider.

   When the group of keys is found, the 1990 relay operates and closes in the 1991 frame a circuit from earth to the 2003 frame for the 1980 relay which locks by means of the 1981 frame and opens at the armature 1984 the circuit of the magnet 2197.



   Also, at armature 1982, relay 1980 closes a circuit for relay 1970; to the 1983 frame, it connects the slider
2233 to the winding of relay 2040, and to the 1985 armature it extends the earth by the 2004 armature, the conductor 1399 (fig. 15 and 18), the wiper 1382, the 1302 armature, the winding top of relay 1240 to the battery. Relay 1240 is a two-phase relay and only activates its "X" armature designated 1243 at this time.



   When operating, the 1970 relay opens the 1978 armature the above test circuit and the 1977 armature

  <Desc / Clms Page number 32>

 it opens the circuit of relay 2000 which then releases slowly, followed by relay 2010. In addition, relay 1970 connects, to the 1971-1976 fittings, the wipers 2226-2231 to the recorder-converter. As a result of this, the earth is extended from the armature 1664 by the armature 1976, 1c frother 2227, the conductor 1162 (fig. 14,15,16,19 and 20), the winding of the relay 1120 towards the battery in the operator's cord circuit.

   The relay 1120 causes the armature 1121 to switch on the lamp 1153 and for the armatures 1122 and: 1123 it causes the transmission of the dial operation sound, from the sound conductor 1152 to the operator's headset. by means of transformer TR4. A visual and audible signal is thus given to indicate that the voice recorder is able to receive the digits to establish communication.



     Upon releasing, relay 2000 removes the earth from conductor 1399 at the 2004- armature leading to the RGT relay group. As a result of this, relay 1240 is fully energized through its two windings in series, armature 1243 to ground to armature 1235.When fully functioning, relay 1240 completes to armatures 1241 and 1242 points in the conversation connection and to the armature 1244 it extends the resistance earth through the armature 1323, the fixed contact and the wiper 1577, the armature 1224, the sleeve of the jack J2, the conductor of the sleeve of the plug P2, the springs 1145, the contact associated with the armature 1014, the arm 1156 in parallel with the resistor 1157 towards the battery.

   However, the 1156 lamp does not light due to resistance in the circuit.



   The attendant can then set the desired number on her group of KS keys and when, in the assumed case, the call must be extended to a subscriber in an office in another zone, the attendant will generally have to set up a number consisting of eight digits of which the first is the digit "O", the next two represent the designation of the zone

  <Desc / Clms Page number 33>

 desired, the next two represent the office in that area while the remaining three represent the number of the called participant in their own office.

   It should be noted that the connections to the keys forming the set of keys KS are arranged so that the digits are transmitted to the recorder-converter in code, the arrangement being such that different combinations of the conductors 1163-1166 are made available. earth to represent the numbers. Thus in the case where the first digit is "0", lowering the corresponding key in the set of keys KS causes the extension of the earth through the contacts 1168 towards the conductor 1166 (fig. 20, 19, 16, 15 and 14), the fixed contact and the wiper 2231, the armature 1972, the wiper 2209 on the contact 1, the winding of the relay 1500 towards the battery. The code used is the-! same as that exposed previously.



   The relay 1500, when operating, locks by the frame 1502 to the earth at the frame 1651, and at the frame 1501 it extends the earth of the frame 1651 by the frames 1511, 1521, 1531 , the winding of relay 1620 towards the battery. Relay 1620 operates and at armature 1625 it extends earth through cam springs 2205, switch contacts 2200, magnet winding 2199 to the battery. The rubbers of the RCS road control switch are thus rotated to contact 13, where the above chi circuit is opened by the opening of the cam springs 2205.



   In addition, when one of the keys of the KS key set is lowered, the earth is also extended by contacts such as 1169 to conductor 1161 and thence by friction 2226 (fig. 14), armature 1971, the winding of the magnet 2190 towards the battery. Magnet 2190 is therefore excited in preparation for advancing the wipers of switch D3 to contact 2. When the attendant

  <Desc / Clms Page number 34>

 let go of the key, this earth is removed and the magnet de-energizes to advance the wipers on contact 2.



  In this position, the earth is extended ¯by the trotter 2210 on contact 2, the armature 1623, the contact 1 and the trotter 2214 of the switch D4, the switch contacts @@@@@ 2193, the winding of magnet 2192 to the battery. The rubbers of switch D4 are thus advanced to position 2, following which the above circuit is opened.



  The reason for the advancement of the switch D4. is that this co-mutator controls the impulse transmission of the recorder-converter corresponding to the number formed by the operator, and since the figure "O" is not used in the establishment of communication but is only used to cause certain changes in the circuit in the recorder-converser, switch D4 is advanced to contact 2 to prevent this number from being transmitted.



   The second digit is then established by the operator and is stored on group II of the storage groups, comprising relays 1540, 1550, 1560 and 1570. The excitation circuits for this group of relays have not been shown. - healthy but will be understood from the explanation given above of excitement. of Group I. The remaining digits are stored on like groups with switch D3 moved forward from position to position as each digit is stored. With the wiper 2210 on contact 3, that is to say after the storage of the second digit, the earth is extended by means of this trotter to operate the relay 1630.

   Relay 1630 is locked by armature 1631 to earth to armature 1657, and to armature 1632 it closes the following circuit for the lower winding of relay 1640: earth, armatures 1632, 1641, the lower winding of relay 1640 towards the battery. Relay 1640 is a self-interrupting relay and is used to generate pulses to advance the various switches in the recorder-converter and also.

  <Desc / Clms Page number 35>

 also to control the transmission of series of pulses therefrom.



   When relay 16.40 is first energized, the earth is extended by armatures 1642, 1673, 2181, 2162, 2114, 2071, 2081, 2093, the upper winding of relay 2090 towards the battery.



   Relay 2090 is a two-phase relay and only actuates its armature "X" designated by 2091 in this phase. When relay 1640 releases, relay 2090 operates fully by its lower and upper windings in series, and the armatures. 2091, 2113 to earth at 1658. At armature 2092, relay 2090 prepares a circuit by which relay 2100 is energized during the next operation of relay 1640, and at armature 2094 it closes a circuit for both windings of relay 2120 in series.



  This last relay is energized and at armature 2123, it short-circuits its lower winding and at armature 2121 it extends the earth from armature 1871 to the battery by winding relay 2130. Relay 2130 which is slow to release energizes and closes a circuit for Relay 2140 e which is slow to release. When relay 2100 operates during the next operation of relay 1640, the earth is extended by the armatures 2101, 1732, the winding of the vertical magnet 2194 of the two-way switch TD1 towards the battery. The sliders of the TD1 switch are thus vertically swung in synchronism with the operation of relay 2100.

   In addition, the 2100 relay extends to the 2102 armature the earth by the 1794, 1785, 1775, 1765, 1754 armatures, the lower winding of the 1750 relay to the battery, The 1750 relay which is the first in the series meter-relays comprising relays 1750, 1760, 1770, 1780, 1790 and 1800 is a two-phase relay and at this moment it only closes its "X" armature designated by 1753 / Finally the 2100 relay opens to the 2104 armatures and

  <Desc / Clms Page number 36>

 2105 the circuit extending from relays 2070 and 2080 to the RTGS group selector (fig.l); the opening of this circuit has no effect at present since the reinforcements 2104 and 2105 are short-circuited by the reinforcements 1746 and 1747.



   The setting of the two-way switch TD1 is controlled according to the second and third digits transmitted by the operator, which digits have been stored on the storage relay groups II and III by means of the trotters 2206, 2207. , 2208 and 2209 of switch D3. The contacts 1-8 associated with these trotters are connected in multiple to the corresponding contacts of the wipers 2215, 2216, 2217 and 2218 of the switch D4.

   With the trotters of this switch in position 2, a connection extends from the contact associated with the armatures 1541, 1551, 1561, 1571 of the second group of storage relays to the second contacts associated with the wipers 2215, 2216, 2217 and 2218 of switch D4. If we assume as an example that the second number formed on the dial by the operator is the number 8, in this case relay 1560 of the second group of storage relays will have been energized and the earth will have been extended by armature 1652, armature 1561, contact 2 associated with wipers 2216, the winding of relay 1700 towards the battery.

   Relays 1690, 1700, 1710 and 1720 act as decoder relays and in accordance with the number that is stored on the particular group of storage relays, the earth is extended to the appropriate conductor among the ten conductors by the contacts of these relays. These conductors extend through the indicated cable to the armatures associated with the chain of meter relays comprising the 1750, 1760, 1770, 1780, 1790 and 1800 relays.

   As indicated above, the counter relays count the number of pulses transmitted to the vertical or rotary magnet of the switch TD1 and when this number coincides with the number stored on the group

  <Desc / Clms Page number 37>

 appropriate storage relay, the transmission of pulses to the magnet is complete. This operation is similar to that described in the recorder-converter shown in the prior patent and will not be described in detail. When the correct number of pulses has been transmitted, in this case 8, the earth is extended by the armatures 1761, 1801, 1803, 1887, the winding of the relay 2110 towards the battery.

   Relay 2110 operates to disconnect relay 2100 from armature 1642 from relay 1640 to armature 2115, and at armature 2111 it extends earth through armature 1733, the upper winding lasts 1730 to the battery . Relay 1730 is a two-phase relay and only then actuates its "X" armature designated by 1731. Relay 2110 opens to armature 2112 the locking circuit of the counting chain relays which then release and open. the initial excitation circuit of relay 2110, this relay being however kept actuated by armature 2115 towards earth at armature 2122, 2131 or 2141.

   In addition, at armature 2112, relay 2110 extends the earth of armature 2051 through armature 1745, the lower winding of relay 1670, the winding of magnet 2192 from switch D4 towards the end. drums. Relay 1670 and magnet 2192 are energized by this firing and relay 1670 opens to armature 1673 a new point in the pulse circuit. Relay 2110 also opens at armature 2113 the latching circuit of relay 2090 which releases, and at armature 2094 opens the circuit of relay 2120, which releases slowly, followed by relays 2130 and 2140. Relay 2110 is released when relay 2140 finally releases, after which relay 1730 fully energizes and locks by its two windings in series, armature 1731 to earth in 1656.



  Furthermore, at armature 2112 the circuit for relay 1670 and magnet 2192 is open, whereupon the wipers of switch D4 are advanced to position 3. The relay

  <Desc / Clms Page number 38>

 1670 is also released and at armature 1673 it closes a point in the pulse circuit which is completed by closing armature 2114-, Relay 209C is actuated again at the first pulse and relay 2100 is actuated during the second impulse and the armature 2101 it extends the earth through the armatures 1732, 1742, the winding of the rotary magnet 2195 from the switch TD1 towards the battery.

   The number of advances made by the rotating magnet is determined in a manner analogous to that described for the vertical magnet and relay 2110 operates again to complete sending pulses to the rotating magnet and to cause the rubbers of switch D4 to advance to position 4. In addition, at armature 2111, the earth is extended by armatures 1733, 1743, the upper winding of relay 1740 towards the battery. Relay 1740 is a two-phase relay and only then closes its "X" armature designated 1744. When relay 211C releases, relay 174-0 operates fully through its two windings in series, armature 1744 to land in the ar- mature 1734-.

   Additionally, at armature 1742, relay 1740 opens the circuit to rotating magnet 2195 and to. the armature 1741, the earth is extended by the armature 1622, the armature 1903 towards the conductor 2071. The conductors 2065-2071 are connected to the different friction switches of the RCS route control switch which has the same function as the route switch described in the patent previously indicated.



   In short, the RCS switch, moving forward from contact to contact, controls the transmission of the necessary impulses from the recorder-conversour, in concordance with the cross connections between its contacts and the conductors shown near the fixed contacts. The operation of this switch is not part of the present invention but in order that the establishment of communications by the recorder-converter can be more easily understood a detailed example of a series of cross connections a been given in fig.

   22 on the assumption that the driver

  <Desc / Clms Page number 39>

 2071 is connected to the slider 2234 of the route control switch in the hut to establish communication to another area, If we refer to fig.l, we see that with regard to the equipment in the office of Mons, the. pulses transmitted by the recorder-converter must carry out the setting of the RTGS group selector while another digit is required to choose the desired quality of charging lines in the group of relays RG as described above. previously described.

   Finally, the number of the called party and an additional digit, the digit "0", are transmitted to the TLCC charging line control circuit in code, the additional digit serving to prevent the time measuring device in this circuit from entering. in action and also serving to prevent printing equipment from being connected as described above. Two figures are therefore necessary to position the equipment in the Mons office. If we now refer to fig. 22 which shows the cross connections in the call under consideration, it will be noted that the first digit is controlled by the connections of contact 13 to conductor 2076.

   This conductor is connected to the wiper 2221 and the contact on which this wiper is located is arbitrarily connected to one of the ten impulse control conductors. The first digit transmitted therefore depends on the z8ne of the called participant, in order to position the RTGS group selector in such a way that the junction line to be entered is a line extending towards the required zone. If, for example, it is assumed that the RTGS group selector is to be set to stage 5, the contact on which the slider 2221 rests is connected to the pulse conductor 5 which is extended towards the armature. ; 1791 of the counter relays described above.



   The transmission of pulses from the recorder-converter is initiated when relay 2110 is released and is carried out by relay 2100 operating in synchronism with the relay.

  <Desc / Clms Page number 40>

 relay 1640. Note that as relay 1740 is now actuated, armatures 1746 and 1747 are currently open and consequently the openings of armatures 2104. and 2105 when energizing relay 2100 causes the transmission of pulses of breakage by conductors 1401 and 14-Ci! and from there by the relay group RG by the upper selector RTGS. The counter relays 1730, 1760, 1770, 1780,

   and 1790 and 1800 operate in the manner previously described and at the end of the fifth pulse the earth on the 1791 armature is extended by means of the 1884, 1803, 1887 armatures, from the winding of the 2110 relay to the battery. Relay 2110 operates to terminate the transmission of pulses and at armature 2111 the earth is extended by armatures 1733, 1743, 2182, the winding of magnet 2199 to the battery.



  Magnet 2199 is thus energized in preparation for advancing the trotters of the RCS switch to position 14 when relay 2110 releases, and this operation occurs each time relay 2110 is energized. With baby walker 2234 on contact 14, earth is extended to conductor 2 among the pulse control conductors to cause digit 2 to be transmitted.

   The reason this figure is fixed in the present case is that, as indicated above, only calls for which the rate is higher than the lower value are directed to an operator, and all of these calls require a premium trunk line. It is obviously possible that this figure must be made variable, in which case an additional trotter must be provided on the switch TD1 and the contact 14 would be connected in a cross to this trotter. When the number 2 has been transmitted, the trotter 2234 is advanced to contact 15.

  <Desc / Clms Page number 41>

 



   The TLCC charged line control circuit is now taken up and prepared to receive the number of the called party and the digit 0. This transmission takes place in code and in order to modify the circuits.
 EMI41.1
 of the recorder-converS8tIT so that this code transmission can take place, the contact 15 associated with the wiper 2234 is cross-linked to the conductor 2072 so that the earth extended by this conductor makes the relay 1870 operate by its winding superior. The 1870 relay closes to the 1871 armature a clearly visible circuit for the slow-to-operate 1880 relay which, to the 1883 armature, closes the following circuit: earth, the 1735 armature, the winding, lower of the 1870 relay, the armature 1883, the winding of the relay 1890 towards the battery.

   The operation of relays 1880 and 1890 connects the ten pulse control conductors to the windings of relays 1820, 1830, 1840, 1850 and 1860 as shown.



   With regard to the code used, as described above, each digit comprises a cycle of four pulses and each pulse is transmitted by the conductor 1401 or by the conductor 1402. The counting of each ! cycle is carried out by the relays 1750, 1760, 1770 and 1780 and the determination of which conductor a pulse should be transmitted is effected through the extended earth by means of an appropriate conductor among the ten conductors control.



   The second and the third digits forming the number of the called participant have been stored by the vertical and rotary movement of the switch TD1 and the transmission of these two impulses is effected by the cross connections going from the contacts 15 and 16 associated with the sliders 2234 to the conductors 2073 and 2074 respectively, which in turn are connected to the vertical trotter 2225, the slider 2223, the contaots associated with the trotter 2223

  <Desc / Clms Page number 42>

 being connected in multiple vertically.

   Therefore, with the 2234 wiper on the contact 15 the earth is extended by the conductor 2073, the vertical wiper 2225 and, assuming the second digit to be the digit 8, by the contact 8 in the vertical row of fixed contacts, through the pulse control conductor 8 to the armature 1898, the lower winding of 1840 to the battery. The 1840 relay operates and at the 1841 armature it closes a circuit for the 1810 relay. The following circuit is then closed: the earth to the 1776 armature, the 1766, 1755, 1842, 1811 armatures, the flow of the r @@@@@ 2150 to the battery. By examining the table shown in FIG.



  23, we see that the number 8 is represented by a cycle of pulses, the first, third and fourth of which are transmitted by means of the negative conductor 1402 while the second is transmitted by means of the positive conductor 1401. During the following operation of relay 1640, relay 2090 operates through its first phase and it functions fully when releasing relay 1640, as described previously, and to armatures 2095 and 2096 it connects the resistance battery and the ground to positive and negative conductors 1401 and 1402 respectively, in order to improve the pulse circuit. During the next operation of relay 1640, relay 2100 operates and opens its 2104 and 2105 armatures.

   As a result of the opening of the reinforcements 2104 and 2105, a breaking pulse is transmitted by the negative conductors 1402 but no impulse is transmitted by the positive conductor 1401 since the reinforcement 2104 is switched on. short circuit by actuated armature 2151 of relay 2150.



   Relay 1750 operates fully at the end of the first pulse and locks by armature 1753 while at armature 1755 it opens the circuit shown above for relay 2150 which then releases. The impulse

  <Desc / Clms Page number 43>

 The following is therefore transmitted into the recorder-converter as a break pulse through positive conductors 1401, as armature 2151 is now open and armature 2152 is closed to complete a short circuit across the armature 2105 by the 1885 armature. The 1760 relay operates fully at the end of the second pulse after which the following circuit is closed for the 2150 relay: earth, 1776, 1766, 1844 armatures, the winding of the 2150 relay towards the drums.

   The next pulse is again transmitted as a break pulse through negative conductor 1402. Relay 1770 operates at the end of the third pulse and the following circuit is then closed for relay 2150: earth, armatures 1776, 1845 , 1811, the winding of relay 2150 to the battery.



  The fourth pulse is then transmitted as a break pulse by the negative conductor 1402. The relay 1780 operates fully at the end of the fourth pulse and the following circuit is then closed: earth, armatures 1872, 1786, winding from relay 2110 to the battery. Relay 2110 operates to complete the impulse transmission and at armature 2112 it opens the circuit of relay 1780 which then releases. Accordingly, when the pulse transmission starts again for the transmission of the third digit; the relays 1750, 1760, 1770 and 1780 are again actuated successively to count the four pulses of the digit following the pulses.



   When relay 2110 becomes free at the end of the transmission of the second digit of the participant number. called, the circuit of the magnet 2199 is opened at the armature 2111 and the wipers of the RCS route control switch are advanced to position 17. With the slider 2234 on the contact 17, the earth is extended towards the conductor 2074 and thence to wiper 2223 of switch TD1 in

  <Desc / Clms Page number 44>

 view to control the transmission of the third digit of the. number of the called participant. This takes place in a manner similar to that described above for the second digit and therefore a detailed description will not be given.



   The digits from the fourth to the eighth of the called party's number are stored on relay groups IV throught VIII and the recorder-converter circuits must be changed slightly so that the digit transmission can be controlled in accordance with operation. storage relays. For this purpose, the contact 18 associated with the trotter 2234 is connected in a cross to the conductor 2078 so that when the friction pad 2234 advances towards the contact 18 at the end of the transmission of the second digit, the earth is extended by this trotter, conductor 2078, armature 2175, coil winding 2160 to the battery.

   Relay 2160 operates and at armature 2164 it closes a circuit for slow to operate relay 2170. In addition, relay 2160 opens at armature 2162 the pulse circuit to relays 2090 and 2100 to delay the transmission of the pulses from the recorder-converter until the circuit changes have been completed, and at armature 2163 a circuit is completed before operation of relay 2170 from ground to armature 2173 , by armature 2163, the winding of relay 2110 towards the battery. Relay 2110 operates and at armature 2111 it again closes the circuit for magnet 2199.

   In addition, at armature 2161, relay 2160 prepares a circuit which is completed during operation of relay 2110 qt which extends as follows: earth, armatures 2051, 2112, 2161, 2172, l lower coil of relay 1670, the coil of magnet 2192 towards the battery.



  Magnet 2192 is energized in preparation for the advancement of the wipers of switch D4 and de-energizes when relay 2170 is operated. The trotters of switch D4 are thus advanced to contact 4, position in which

  <Desc / Clms Page number 45>

 the appropriate relays among the relays 1690, 1700, 1710, 1720 are actuated by means of the wipers 2215, 2216, 2217 and 2218 in accordance with the operation of the relays of the storage group IV. In addition, relay 2170 operates, the circuit of relay 2110 is opened and this relay is released, after which at armature 2111, the circuit of magnet 2199 is opened so that this magnet de-energizes and advance the wipers of the RCS switch to contacts 19.

   The following circuit is then closed for the left winding of relay 2260: earth, armatures 2051, 2112, 2171, 2261, the left winding of relay 2260 to the battery. Relay 2260, at armature 2262, locks to earth at armature 1735; and at armature 2264, it extends the earth through the pyramid of contacts controlled by relays 1690, 1700, 1710, 1720, so that the appropriate pulse control conductor is grounded to cause the operation of the appropriate relays among relays 1810,1820, 1830,1840, 1850 and 1860 which control the transmission of coded digits as described above. 'previously indicated.



   Transmission of the coded digits representing the fourth digit and up to the eighth digit of the called party's number takes place in a manner similar to that described above for the first two digits and therefore will not be described in detail. It should be noted that when the relay 2110 operates at the end of each digit, the circuit to actuate the magnet 2192 then extends from the earth to the armature 2151 through the armatures 2112, 2263 and from there through the winding from relay 1670 to magnet 2192. The RCS route control switch wipers advance for each digit transmitted but there is no cross-connection of contacts 19 to 23 as the route control switch does not participate in the determination of these figures.

   The rubbers of this switch

  <Desc / Clms Page number 46>

 will therefore remain in one position while transmitting the digits from the third to the seventh but in order to avoid changing the circuit to produce this it has been found simpler to allow the trotters to be advanced and to leave five associated empty contacts. at. baby walker 2234.



   When the eighth digit has been transmitted, the trotter 2234 is advanced to the contact 24 which is cross-connected to the conductor 0 among the pulse control conductors, in order to effect the transmission of the digit C. The previously described this figure is transmitted to the line control circuit at. charging and is used to prevent the measurement of the call time and the connection of printing equipment. At the transition of the digit 0, the trotter 2234 of the RCB road control switch is advanced to the contact 25 which is cross-connected to the horn;

  - conductor 2079. The earth is extended by conductor 2079, the winding of the. relay 2180 to the battery. The rel @ is 2120 functions to induce the release of the return-conversour.



   Relay 2180 opens at armature 2181 the pulse circuit to relay 2090 and 2100, at armature 2182 it opens the circuit of magnet 2199 of the route control switch, and at armature 2183 it closes a circuit of the earth of resistance to the armature 1624 by the armature 2183, the conductor 1698 (fig. 15 and 18) the contact f @@ o and the frot- er 1381, the armature 1306, the windings lower of relays 1310 and 1320.

   Relay 1310 operates and latch by its top winding and armature 1314 ground to armature 1231, while relay 1320 is marginal and does not operate by the above circuit. As will be indicated later, the operation of relay 1320 causes the lighting of the monitoring lamp in the cord circuit when communication has been established with the called participant but before it answers.

   When then the operator

  <Desc / Clms Page number 47>

 establishes a communication to the local subscriber this state will be assumed to exist when the transmission from the conversational recorder is completed. In this case relay 1620 in the conversational recorder is not energized but by con - The direct earth to armature 1624 is extended to the windings of relays 1310 and 1320. Relay 1320 then operates as does relay 1310.

   When the attendant, on the other hand, establishes an inter-zone communication, the communication may not be completed until a certain time after the completion of the transmission from the DVR, particularly if the communication. - communication goes through one or more offices in tandem. For this reason, relay 1320 is not actuated when the recorder-converter is released, measures are taken whereby when the communication is completed, an auxiliary battery pulse is transmitted by the private driver, winding of relay 1330 and rectifier to earth. Relay 1330 now operates and at armature 1332 it closes a circuit for the upper winding of relay 1320 which then operates.

   In operation, relay 1320 extends to armature 1323 the direct earth of armature 1235 to the cord circuit monitor lamp in place of the resistance earth coming from armature 1244, and then the lamp monitor lights up. Relay 1310 when operating, opens at armature 1311 the circuit for relay 1300 which becomes free and at armatures 1303 and 1304 it extends jack leads 1387 and 1388 directly to the first group RTGS selector. At the same armatures, relay 1300 disconnects relays 2070 and 2080 belonging to the recorder-converter from conductors 1403 and 1404 leading to the first group selectors. These relays then release and open the circuit of relay 2060.

   Relay 2060, when freeing, opens at armature 2061, the circuit for relay 1650 which at armature 1657, opens the circuit for re-

  <Desc / Clms Page number 48>

 1630 which releases and at armature 1632 prevents continued operation of the pulse generation relay 1640. Relay 1650 further opens to armature 1656 the latch circuit for relay 1730 which turns on. then releases and opens the latch circuit for relay 1740 which also releases. Finally, relay 1650 opens the latch circuits for the storage group relays to allow these relays to release.



   In addition, the relay 2060, when freeing, extends the armature 2062 the earth through the lower winding lasts 1660, the springs out of normal 2201 in the actuated position, the contacts of into @@ upte @@ 2191 , the winding of the magnet 2190 towards the battery.

   Magnet 2190 is energized by means of this self-interrupting circuit and rotates the rubbers of switch D3 to contact 11 where the self-interrupting circuit is open to out-of-normal 2201. The earth connection coming from the armature 2062 is then extended by the normal hoes contacts 2201 in their rest position, the out of normal contacts 2202, the switch contacts 2193, the winding of the magnet 2192 towards the battery.

   The trotters of switch D4- are thus set in a similar manner to position 11, after which the out-of-normal springs 2202 are returned to their normal position and the earth connection is extended by the vertical springs out of the way. normal 2203, the winding of the release magnet 2196 from switch TD1 to the battery.

   The TD1 switch is thus brought back to normal and with the vertical springs out of normal 2203 in their rest position, the earth is then extended by the out of normal springs 2204 of the RCS route control switch, the contacts of switch 2200, the winding of the magnet 2219 towards the battery. The

  <Desc / Clms Page number 49>

 Road control switch wipers are thus rotated towards contact 1 where the self-interrupting circuit is opened following the opening of the springs out of normal 2204. Note that the relay 1060 remains actuated during the return. to the normal of the different
 EMI49.1
 switches in ltenre, is'reu.r-cenverseur.

   This relay short-circuits the armature 1662 its upper winding to be made slow to release and the armature 1663 it provides its own operating earth independently of the relay 2060. Finally, the armature 1663, it extends the earth through conductor 1396 in order to make the recorder-converter occupied during the return to normal of the various switches.



   Finally, the 2060 relay opens at the 2062 armature and at its work contact the circuit for the 2060 relay which, by freeing itself, opens at its different armatures retaining circuits for the different aotated relays in
 EMI49.2
 Ilenregistretir-coiiverseur, which relays are then released.



  The registrieaz> -eonveiseur is then brought back completely to. normal and can be used to establish another call.



   When the recorder-converter has been released, communication extends from the attendant station through the switch-, their RGTF, the RGT relay group, the RTGS group selector, the RG relay group, the F2 switch, the TLCC charging line control circuit and from there through the trunk or charging line to the requested office and to the required subscriber in that office. A connection is also established to the calling participant by means of a device which is not represented by the insertion of the plug P1 in a suitable jack.

   When the called party answers, the battery and earth connections are reversed on the talk conductors, so that relay 1280 (fig. 18) operates and at armature 1282, clears a short circuit around. of the lower winding of relay 1250.

  <Desc / Clms Page number 50>

 



  This increases the resistance in the monitor lamp circuit 1146 and the lamp turns off. However, relay 1250 operates via this circuit. The attendant can then speak to the calling participant or to the called participant by pressing the keys K1 or K2 respectively, while she can ring the participants by pressing the keys K3 or K4.



   When the conversation is ended by the participants replacing their receivers, the operator's cord circuit lamp 1154 is lit as described above. The operator then removes the P1 plug from the jack. With regard to the called participant, the relay 1280 releases when it replaces its receiver, after which the earth of the armature 1235 is extended by the armatures 1282, 1253, 1273, the relay winding 1260 towards the battery. Relay 1260 closes to armature 1261 a circuit for the low resistance top winding of relay 1250 for monitoring lamp 1156. This lamp is lit by this circuit.

   In addition, relay 1260 is locked to earth by armatures 1262, la? 1, 1251. Relay 1270 is provided, darelebut to allow the called participant to call back the operator by shaking the cre @@@@ t -co @@@@ utat @@@.



  As the relsis 1270 operates in a manner analogous to the relay 420, a more detailed description of these details will not be given. The attendant then removes plug P2 from jack J2 to open the circuit from relay 1200 to spring 1389.



  By releasing, the relay 1200 opens to the armature 1201 the circuit of the relay 1210 which is released and 2, the armature 1213 opens the circuits of the relays 1220 and 1230 which are also released. Relay 1230 opens the relay interlock circuits of the RGT relay group to its various armatures, so that this device can now be used for another call.



   Although it does not propose to deal in detail with the other types of calls which may be established by the recording.

  <Desc / Clms Page number 51>

 Inverter-converter, the general principles by which the selection of the contactors of the RCS route control switch is made will be explained. Some calls are made by dialing four digits, the first and fourth of which are "O". In this case the relay 1620 is actuated as before and furthermore the relay 1580 of the storage relays of group IV is also actuated. The earth is then extended from the frame 1621 of the relay 1620 by the frames 1611, 1601, 1591 and 1581 to the wiper 2219 of the switch TD1.

   Calls of this type fall into two different categories which require different route control switch sliders to effect their establishment, and the connection of these sliders is controlled by relays 1950 and 1960. These relays are wired to the switches. appropriate contacts in the row of fixed contacts associated with the wiper 2219 of switch TD1 so that one or the other is actuated in accordance with the second and third digits established by the operator. The function of either of the 1950 and 1960 relays causes the driver 2065 or 2066 to choose the appropriate road control switch slider.



   In a number of cases the selection of the appropriate ROS route control switch friction switch for calls with the first digit / 11011 is effected by the operation of one of relays 1910 or 1920, 1930 or 1940. following the second digit formed by the operator. The excitation circuits of these relays are completed by means of the appropriate vertical contacts associated with the 2224 slider, so that when the TDI switch has been placed in the vertical position for such a call, the earth is extended. by the armature 1626, the vertical wiper 2224 and the fixed contact, the winding of one of the relays 1910,1920, 1930 and 1940 towards the battery.

   The appropriate wiper of the com-

  <Desc / Clms Page number 52>

 RCS route control switch is then taken into service by driver 2067, 2068, 2069 or 2070.



   It should be noted that the operation (any one of the relays 1910, 1920, 1930, 1940, 1950 and 1960 closes a circuit for the relay 1900 which, when operating, opens the circuit to the 1903 armature by the conductor 2071 to prevent a selection of the walker 2234 of the route control switch which controls the establishment of a subscriber connection to another zone.



   When calls are made by the operator to a local subscriber, relay 1620 is not actuated and the selection of an appropriate RCS route control switch slider is then made from ground to rear. - Mature 1741, and after the setting of the switch TD1, by the armature 1622 in its rest position, the trotter 2220 of the two-direction switch TD1 towards the fixed contacts associated with this wiper.

   These fixed contacts are connected to the appropriate rubbers on the route control switch to allow the appropriate baby walker to be chosen in conjunction with the setting of the TD1 switch.



   Another point should be noted regarding the establishment of special service calls to another area. These calls are designated by only five or six digits and in order to ensure the correct functioning of intermediate circuits, a code signal is automatically transmitted:. from the recorder-converter after the last back code digits. This is done by the following contacts associated with the appropriate driver-to-drive control switch slider 2077, (such that a circuit is thus completed for relay 1680.

   The 1680 relay closes the 1681 armature a clearly visible circuit for the 1690 relay, at the 1632 armature it closes a clearly visible circuit for the 1700 relay and at the 1683 armature it modifies the circuits extending from the relay contacts - 1750 counters,

  <Desc / Clms Page number 53>

 1760 and 1770 and by the contacts of relays 1810, 1830 and 1840, 1850 and 1860, which circuits control the operation of the. relay 2150. By this means, a coded signal thus comprising the four pulses, the first three of which are effective for operating storage relays of the appropriate office in the intermediate equipment, is transmitted. It can be seen by referring to FIG.



  23 that this combination of pulses does not correspond to any particular figure but serves to vary the operation of the intermediate circuits as was explained in detail in another patent (Case Z.99). (Ng- de request 360.555)
As regards the variations introduced by: the operation of the armature 1683, it should be noted that as the relays 1690 and 1700 are actuated, the earth is extended by conductor 1 of the impulse control conductors to make operate relay 1820 by means of its upper winding.

   When the first pulse of the cycle is to be transmitted no circuit is completed for relay 2150 and therefore a pulse is transmitted through positive conductor 1401. Further, no circuit exists for relay 2150. during the second impulse. So far, the operation has been normal since the circuit has been established to control the transmission of digit 1 and with reference to fig. 23, it can be seen that for such a digit, the first two relays of the appropriate storage group must be actuated. On the third pulse, the normal circuit for relay 2150 extends from earth to armature 1776 in its rest position through armature 1766 in its actuated position, armatures 1824, 1683, 1811 , the winding of relay 1250 towards the battery.

   This circuit is however currently open to armature 1683 and consequently no operation of relay 2150 occurs during the first pulse and this pulse is therefore transmitted again by the positive conductor to cause the operation of the third.

  <Desc / Clms Page number 54>

 relay of the appropriate storage group. The fourth impulse is transmitted by the negative conductor, of silk that no storage relay is actuated.



   If the attendant makes a mistake when establishing the called number, she activates the key K11 (fig. 20) which extends the earth through conductor 1172 (fig. 20,19,16,15 and 14), the fixed contact and the trotter 2233, the armature 1983, the winding of the relay 2040 to the battery. Relay 2040 operates and at armature 2043 and its normally closed contact, it opens the circuit for relay 1650, and at its power contact it provides an additional holding circuit for relay 2060. Relay 1650 opens, when freeing, the interlock circuit for the storage relays so that all these relays are released.

   In addition, relay 2040 closes at armature 2042 a conspicuous circuit for 10 relays 2100 which operates and opens at armatures 2104 and 2105 the circuit to the RTGS group selector. The opening of this circuit only produces an effect if the TD1 switch has been put in position and the armatures 1746 and 17-7 are open since it is only necessary to open this circuit if the group selector has been activated. operates. Finally, the 2040 relay, to the 2041 armature and to.

   its normally closed contact, removed the torro from conductor 1395 which extends towards the guard conductor of the group selector, and at its working contact, relay 2040 completes a circuit to sweep the various switches to normal. Relay 1660 operates during this return to normal and at armature 1664 completes a circuit of the latch for relay 2040 through armature 2044.



   During the operation of the K11 key, the communication established up to this moment is thus defeated and the recorder-convorator is restored to normal, but following the continued operation of the 2060 relay, it is recorded. - converter-converter is maintained associated with the operating station and when relay 1660 is released, the operating sound of the

  <Desc / Clms Page number 55>

 dran is transmitted to the attendant as described above, after which she begins to establish the connection again.



   As previously indicated, the calling subscriber can establish a communication with the operator and have the metering call set up for him by the operator. In this case the switch IS is raised to the fifth or fourth floor and then searches for a group of free relays RG2. Taking this group of relays into service causes the same succession of operations as those described above except that the communication between the calling party and the attendant is not defeated when the attendant has obtained the details, as she can proceed immediately to call setup.



   Another type of call that can be handled by the attendant is a special service call. The selector IS in this case is raised to the tenth floor and searches for a special service selector SS which is free. This selector then searches for a free relay group such as the RG3 relay group in the floor chosen (fig. 1 and 21). When this group is found, the battery is extended by the 3280 conductor (fig. 21) the contacts associated with the 3241 armature, the lower winding of the 3260 relay to earth at the contacts of, the 3245 armature In addition the earth is extended by the conductor 3281, the contacts of the armature 3242, the armature 3201, the lower winding of the relay 3250 towards the battery.

   The 3250 and 3260 relays operate and the 3250 relay extends to the 3251 armature the earth through the 3234 armature, the 3285 key springs, the 3289 lamp to the battery.



  This 3289 lamp is lit to attract the attention of the operator. The 3260 relay, when operating, closes to the 3261 armature a circuit going from the sound conductor 3284 through the capacitor 3290, the 3261 armatures, 3243e 3231Y the upper windings of the 3260 and 3250 relays, so that the sound

  <Desc / Clms Page number 56>

 ringing tone is transmitted to the calling participant by induction through the lower windings of the relays.



  The 3260 relay finally forms the 3262 armature a cirouit for the slow releasing relay 3270 which operates and the 3271 armature extends the earth to the private conductor 3282.



   When the attendant inserts plug P1 into jack J3, the earth to springs 3287 is extended by winding relay 3240 towards the battery. Relay 3240 operates and at armature 3244 it closes a circuit for relay 3230- The circuit from its conductor 3284 is then open to armatures 324-3 and 3231 and the circuit for lamp 3289 to armature 3234. Also, at armatures 3241 and 3242, relay 3240 reverses the battery connections to the conversation conductors.



   The 3230 relay, while operating; Closed to armature 3233 'HIM circuit for the high resistance lower winding of relay 3220, through sleeve 3288 and thence to the battery through monitor light 1154 in the cord circuit. Relay 3220 operates through this circuit but the monitoring lamp does not come on. The operator then speaks to the calling participant and provides him with the information or service he requests. The end of the conversation of the calling party replaces the receiver and relays 3250 and 3260 are released followed by relay 3270, the earth being maintained on conductor 3282 by reinforcements 3244 and 3232.

   Upon releasing, relay 3250 extends to armature 3251 the ground through the low resistance upper winding of relay 3220 to allow monitor light 1154 to be turned on for ringing. operator an indication that the calling party has hung up. If the service is to be paid for, the attendant then causes the caller party counter, which contains springs 3286, to start; the slow release relay 3210 operates

  <Desc / Clms Page number 57>

 then starts and to armature 3212 it connects the additional battery of the driver 3283 to the private driver 3282.



  The counter of the calling party is thus activated. In addition, relay 3210 closes at armature 3213 a circuit for slow-to-operate relay 3200 which locks by means of armature 3202 to earth at armature 3244, and at armature 3203 opens. the 3210 relay circuit which releases.



  Relay 3200 remains held to prevent continued counter operation. The RG3 relay group is released by removing the Pl plug from the J3 jack.



   It should be noted that although in the preceding description only the number of the calling party has been exposed, it is also possible that the number of the called party must also be exposed if it has been registered once, to help the operator to establish. Communication.



   Furthermore, although in the above description the number of the calling party has been exposed only, it is also possible to store it in the recorder transmitter so that the establishment of a subsequent call to the calling participant, although initiated by the attendant, is performed independently of the attendant
CLAIMS.



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1 / Telephone system in which storage arrangements are provided to allow the recording of the details of a call, characterized in that when the calls are established from an operator station, use is made of some of the storage arrangements to allow the call to be established while at the same time recording of the call is inhibited.

** ATTENTION ** end of DESC field can contain start of CLMS **.


    

Claims (1)

2 / Telephone system provided with the possibility of allowing long-distance calls to be established automatically by a calling participant, and comprising equipment which allows the details of a call to be recorded, in <Desc / Clms Page number 58> which provides arrangements whereby the calling party has the possibility of sending a signal 8, a. operator, if he wishes the call to be established by an Operator, and the equipment mentioned is used by the operator to establish the call while at the same time he is prevented from making the call. call recording. 3 / Telephone system provided with the possibility of allowing the establishment of long distance calls automatically by a calling participant, and comprising equipment which allows the recording of the details of a call, in which if the telephone lines outgoing trunk or charging are not available, the call is automatically directed to an attendant set and the attendant after having noted the details of the call is 1 even to order the establishment of the communication by the use of the mentioned equipment which in this case is preventing the recording of the call. 4 / Telephone system provided with storage arrangements allowing the recording of details of a call including the number of the calling party, in which if a call is extended to an operator, another storage agency is picked up and is used to store the number of the calling party and to initiate its exposure to the attendant. 5 / Telephone system employing operators to control the establishment of a communication, in which storage arrangements are provided which are intended to store a number indicative of the calling party and, when the operator answers, to cause the operator to display an indication of this number in front of the operator. 6 / Telephone system provided with possibilities (. It allow the establishment of long calls. Dista @@ e automatically by a calling party, in which if all trunk lines or charging are unavailable <Desc / Clms Page number 59> When you are busy setting up a long-distance call, the call is automatically routed to a device which determines whether a signal should be sent to an attendant, and also determines in accordance with the situation of the calling party if their individual number or a collective number will be displayed in front of the operator. 7 / telephone system according to claims 1 to 4, wherein the storage arrangements or the equipment are permanently attached to a trunk line or outgoing charging. 8 / telephone system according to claims 1 to 4 and ,, wherein the storage arrangements or the qont equipment intended to measure the time of the call and to store this information while at the end of the call , all of the stored information is transferred to equipment which controls the operation of a printing or recording device. 9 / The telephone system according to claims 1 to 4, 7 and 8, wherein the information transmitted to the storage facility or to the equipment contains a number which gives an indication of the rate at which the call should be billed or an indication that the call is precisely established by an operator. 10 / The telephone system of claim 9, wherein if the figure indicates that the call is precisely established by an operator, the measurement of the time of the call and the seizure of the equipment which controls the device. recording printing are prevented. 11 / The telephone system of claim 1, wherein the call can be established by an operator at the central office where the recording of the call takes place or at a manual office attached to the central office. 12 / The telephone system of claim 3, wherein if the rate at which the call is to be faoturé is, <Desc / Clms Page number 60> less than a minimum determined, the call is not directed to an operator and the busy sound is transmitted to the participant. 13 / Telephone system according to claims 3e5 and 12, in which certain local calls are established on trunk lines or @ charging and if during similar calls trunk lines or charging are not available, the equipment acts to prevent a signal from being sent to an attendant. 14 / A telephone system according to claims 3,5,11 and 12, wherein if trunk or charge lines are not available, equipment is taken up which responds to pulses representing the rate at which l The call must be billed and if this rate is less than a determined minimum, the sending of a signal to an operator is prevented and the busy sound is transmitted to the calling participant. 15 / telephone system according to claims 5 and 6, wherein if the calling participant is a subscriber, its indicative number is exposed to the operator. 16. Telephone system according to claims 5 and 6, in which if the calling participant is an operator, a particular collective number is exposed to the operator. 17 / The telephone system according to claims 4, 5,6,15 and 16, wherein if the calling party is an operator, the number is transmitted to the imaginative arrangements from the apparatus intended to determine whether the call must be directed to the operator, while if the calling party is a subscriber, the number is transmitted from the originating office. 18 / Telephone system according to claims 5, 16 and 17, wherein if the calling participant is an operator, a particular digit is transmitted to the apparatus. <Desc / Clms Page number 61> in place of the figure which normally determines the rate at which the call should be billed and this equipment causes in response to this figure the exposure of the same figure in front of the operator. 19 / The telephone system of claim 18, wherein the reception of the particular digit causes the apparatus to produce pulses representing this digit and to transmit these pulses to an illumination arrangement which controls the exposure of the digit in front. the operator. 20 / telephone system according to claims 1 to 19, wherein the information is transmitted in code to the storage arrangements or the equipment. 21 / telephone system according to claims 1 to 20, wherein when an operator establishes a call, she activates a recorder-converser which, in response to the reception of pulses, representing the number of the called participant, causes the transmission pulses necessary to direct the call to the called party. 22 / telephone system according to claim 19, wherein the number of the called participant is transmitted to the recorder-converseiur by actuating a set of keys provided at the operator station. 23 / The telephone system of claim 19, wherein the recorder-to-talker is adapted to transmit a coded signal when the transmission of pulses from itself is completed. 24 / Telephone system, in substance as described and shown in the accompanying drawings.