BE426051A - - Google Patents

Description

       

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  * Improvements to telegraph systems *
This invention (which is the work of Mr. Philo HOLCOMB) relates to signaling systems and, in particular, arux telegraph systems of the type with multiple circuits (or channel) in which a variable number of telegraph transmitters or other transmitter devices are arranged to control receiver devices each corresponding to a transmitter device - via a traffic line, the

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 occupation time, substantially whole, of the line or a predetermined part of this time being divided between the transmitters in service.

   In a system of this type, the term “traffic line **” means the channel or medium through which the signaling is effected, for example one or more multiplex or carrier circuits (or channels).



   The object of the invention is an improved and simplified system of this kind and an improved apparatus for the control of signaling channels.



   One of the more particular objects of this invention is to establish a multiple channel system in which the service time of the line, or a predetermined part thereof, is divided at will either equally or unequally between transmitters which have message signals to be transmitted over the line. If only a small number of transmitters are in service, the working capacity / traffic of the line may be greater than the working capacity of the transmitters in service and, in this case, it is beneficial to slow down the transmission. - -mission traffic via the line to a sufficient extent for the transmitters in service to function properly.

   It may also be interesting to make certain transmitters unable to take a channel / - in service, for example when certain transmitters are / -in auxiliary traffic of the line when a predetermined number of other transmitters are assigned to the transmission. of deferred massages and that it is good to suspend the deferred service until the regular service has fallen below a predetermined value. Following a preferred embodiment of the invention,

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 some transmitters or channels are only in service when the number of other transmitters being transmitted on the. row is less than a predetermined value.



   Another object of the invention is to establish a multiple channel system in which certain channels have constant transmission speeds or rates. In the usual multi-channel system, the active channels also share the service time of the line, so that the transmission speed for each channel varies according to the number of other channels in use.

   However, in certain cases, it may be advantageous to have one or more channels working at a constant speed regardless of the number of other channels in service and a system of this type constitutes one of the characteristics of the present invention, ,
Another object of the invention is to develop a multi-channel telegraph system in which multiple character transmitters are used, i.e. transmitters which watch for two or more characters during each. cycle of work ,, This! characteristic of the invention pere puts to obtain a higher speed of transmission of the channels when there is only a small number of channels in service ,,

   just as it allows the line to work to an extent which comes closer to its full capacity when there are only a few channels in service,
Further objects of the invention are to establish a multiple channel system further exhibiting one or more of the characteristics or advantages.

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 following, considered separately or in combination:
It uses a multiplex to. several channels as a traffic line and is arranged so as to carry out. from an auxiliary channel simultaneous transmissions by several of the channels of the multiplex system;

   
The input and (or) output signals used to connect and disconnect the receiving devices are composed of combinations of multi-character code, for example two or more successive characters which together constitute a input or output signal and the constituent parts of the input and / or output signals are sent by different multiplex channels, which decreases the possibility of emitting false input or output signals resulting a line disturbance;
It uses a series of synchronous multiplex channels in which the input and (or) output signals are invariably sent only through one of the multiplex channels.

   One of the advantages of this arrangement is that one can employ code combinations used for regular massage characters as input or output signals;
Ordinary code combinations are used as input or output signals, and when these signals come from a transmitter instead of from the control device, they are momentarily delayed or (and) converted to other signals;
A regulator is provided to govern the speed of operation of the control equipment, so that when there are only a small number of

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 transmitters in service, the transmission rate by the traffic line is reduced in accordance with the capacity of the transmitters in service;

     Some channels work only under predetermined system conditions, for example when the number of other channels (such as preferred channels in service is less than a predetermined value, so that deferred service can be suspended until 'that the regular service has fallen below the working capacity of the traffic line;
A simple and efficient arrangement is provided to control the traffic in each channel; or means are provided to establish a basis for taxing users in an equitable manner in a system of this kind;

   
The system is provided with means for sending signals through the channel, for example with a view to operating a warning device to - call an operator located at a remote station, and means for controlling the system, * for example with a view to stop transmission from a remote station or office;
The maximum number of channels in service is substantially constant;

   
The input system is perfected so that it does not require the exclusive use of a code combination for an input signal, and accidental entry or exit of a channel resulting from a disturbance is avoided. line*
Other objects and advantages of the invention will be demonstrated during the description given.

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 hereinafter systems established according to the invention, with reference to the appended drawing in which:
Figures 1, 2 and 3 are partial views. diagrams of a system established in accordance with the invention, FIGS. 1 and 2 showing the circuits and apparatus of the transmitting station and FIG. 3 those of the receiving station;

     Figures 4 and 5 are similar views of a modified system in accordance with the invention;
FIG. 6 is a detailed view of another embodiment of the stopper or latch;
FIG. 7 is a detailed view of an element of the mixer.



   In Figures 1, 2 and 3, the system shown is a multi-channel system using a quad or four-channel multiplex as a traffic line. The synchronous multiplex transmission distributor located at the first station is indicated by TD in FIG. 1 and the receiving distributor located at la. second station is indicated at RD in FIG. 3. The distributors are interconnected by the line circuit L arranged for operation in duplex according to the usual practice.



  It is understood that, ordinarily, the system will also be arranged to effect the transmission from the second to the first station, the apparatus shown being doubled for this purpose.



   Reference will be made more particularly to. the transmission apparatus of Figures 1 and 2. The code combinations representing the characters to be

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 transmitting on the traffic line are stored in the bank or group of relays 10 comprising ten relays (in the case of the five-unit code) including the reinforcements 11 to. 20 are connected by the armatures of a relay 25 to the segments of channels A and B of the TD transmitter distributor or by the intermediary of the armatures of the relay 26 to the segments of channels 0 and D of said distributor,

   whichever of relays 25 or 26 is energized Relays 25 and 26 are connected respectively to segments 27 and 28 of local ring 30 of the TD transmitting distributor in such a way that the relays are energized alternately, whereby the characters stored in the relay bank 10 are alternately transmitted first by one of the channels of the transmitting distributor, then by the other.



   The control coils 31 of the relay bank 10 are multiplied by the contacts of the transmitters of the respective channels of the system, such as the ribbon transmitters 35, 36, 37, 38, 39 and 40, The ribbon or strip transmitters can be 'of the usual type, except that the transmitters 35, 36, 37 and 38 are provided with ten selector contacts and that the step-by-step electro of each transmitter is arranged to drive the ribbon or band of two characters to the time so that, after each working cycle, each transmitter is arranged to actuate relays of bank 10 in accordance with the code combinations representing two successive characters perforated in the tape.

   The transmitter can of course be set up in various ways to effect the transmission of two or more characters during

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 each work cycle. For example, one could by drilling two or more characters side by side in a sledge tape.



   The relays of bank 10 are also provided with return coils 32 which, when energized by segments 41 and 42 of the local ring
30 of the dispenser, are intended to bring the arma% res 11 to 20 to their spaced state. its fourth and ninth relay of bank 10 are also provided with control coils 33 for a purpose which will be seen later.



   The transmitter 36 is automatically introduced into the traffic line when the contacts 45 of the so-called “autostop” automatic stop device are closed, which contacts are controlled by the loop of ribbon adjacent to the transmitter. Each of the other transmitters is introduced in the same way under the control of the associated hitchhiking contacts. The contacts 45 are in series with one half of the coil of the usual hitchhiking relay 46, the midpoint of this coil being connected in series with the stepping electro of the ribbon transmitter 36. The relay 46 is normally energized when the associated ribbon transmitter is inactive,

   as indicated by the fact that the contacts 45 of the autostop open when the loop is shortened, the relay being locked in series with the electro step by step of the ribbon trans- mitter by ion contact of 47 work grounded.



   When the tape boaale lengthens and that, consequently, the contacts 45 close, a parallel circuit is established with the earth through the left half of the coil of the relay 46 and the contacts 45 to put on the ground. earth contact 48 of the TM transmitter mixer. The

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 relay 46 de-energizes, the described circuit grounded by contact 47 opens and the right half of the coil of relay 46 is grounded by contact 49 and the above-described contact 48 of the trance mixer
 EMI9.1
 director.

   A circuit is then established by the right-hand ex% erection and the rest contact of relay 46 of
 EMI9.2
 hitchhiking to introduce the tx, 4monitor into the traffic line in a manner which will be described.



  The tran watch mixer TM comprises a rotating and axially movable arm 54 which is driven
 EMI9.3
 by a friction clutch 55 and rests normally in J If pian d'ww M.r & ...... 'i' It'l àwqpo% aboel ** w 06 which has two operating positions corresponds
 EMI9.4
 When connecting, or switching on, and disbanding or switching off the channel, each of the transmitters is provided with a similar latch 56 56a arranged for
 EMI9.5
 riphërically around the plane of rotation of the mixing arm 54, each loqmets dae being intended to be lowered on the path of the rotating arm to introduce the corresponding% rance transmitter into the line.



   Assuming latch 56 has been lowered to the position marked in dotted lines in the figure
 EMI9.6
 2, in a way that we drink. further on it is obvious that the. rotation of the mixing arm 54 will be stopped by the
 EMI9.7
 meeting this arm with 1 '; inner eÙrénlà of said latch. When the local broom 60 touches the segment 61 or 62 of the local ring 63 (depending on whether the channel
 EMI9.8
 auxiliary peoedemnen% connebté a. been connected to channels to and B or to channels 0 and D of the transmitting distributor, a circuit is established going from the battery to the earth by the conductor 64, 1 the nature of d. the right and the rest contact of relay 66, the electro coil 70 and the

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 normally closed contacts of relay 71.

   Electro 70 then momentarily lowers mixing arm 54 to release this arm from latch 56. Arm 54 begins to rotate in its lowest position; it engages with the internal end of the pivoting contact 48 which is mounted behind the latch 56 and thus momentarily opens the circuit of the electro stepping of the transmitter 36, this circuit comprising the contacts 45 of the hitchhiking, the contact 49 of the relay 46, the coil of the relay 46, the meter control electro 75 and the conductor 76.

   The counter 75 can be an ordinary electromagnetic recorder provided with counting wheels actuated by the successive excitation and de-excitation of the control electric which result from the periodic commissioning of the associated transmitter, thanks to which records the number of message characters sent by the transmitter. The counter recording is a fair basis for debiting the customer according to the actual services rendered and avoids the difficulties experienced in previous systems, such as charging based on the length of time the line is occupied, etc.



   This counting or counting system constitutes an important feature of this invention, since, until now, the charges for telegraph services rendered to customers with telegraph printing apparatus have been time-based. which a communication channel was made available to the customer, given that the latter used the facilities of the Telegraphic Company throughout the time, whether or not a message was actually transmitted during this time. multi-channel system, however, a channel is only busy during the time the client is actually transmitting.

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 and, therefore, charges may be based on the number of characters or words transmitted,

   The advantage of this arrangement from the customer's point of view is obvious.



  To charge for the service rendered on a word basis, the counter 75 can be arranged so that it is operated in accordance with the frequency of the transmission of the "spaces" between the words.



   When the stepping electro of transmitter trance 36 is de-energized as described, the feeler or probe rods of the transmitter are thrown against the ribbon, and the transmitter contacts are selectively actuated in accordance with the characters punched in the ribbon. The contacts which are actuated to come to touch the left or marking contacts of the transmitter close circuits by corresponding control coils 31 of the relay bank 10, which made up the code combinations in this bank.

   The breaking of the circuit of the electro 70 by the continuation of the movement of the broom 60 releases the mixing arm 54 which rises above the contact arm 48 and, on turning, engages the latch of the next channel, which is thus put into service. The contact arm 48, biased towards 1 & closing, closes the circuit of the counter 75 and of the electro stepping of the transmitter 36, after which the feeler rods of the transmitter are withdrawn from the ribbon and the latter is driven. to present the following two characters to the stems,
On completion of the rotation of the mixing arm 54, the stepping electro of the transmitter 36 is again de-energized by the control of the contact arm 48,

     which turns on transmitter 36 to send two characters through the traffic line for each turn of mixing arm 54 as long as latch 56 is down.

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 Likewise, during this rotation, the mixing arm brings into action one after the other, in a predetermined order, the other transmitters which are put in circuit by lowering their latches corresponding to the latch 56, those said transmitters which have nothing to transmit being omitted by the mixer, so that they do not occupy any part of the service time of the line.



   The two characters transmitted by each transmitter during its work cycle are composed on the contacts of the relay bank 10, which comprises ten pole relays each comprising two non-recalled armatures remaining in the positions to which they are brought. The frames 11, 12 .... 20 are arranged so as to transfer the code combinations received from the respective channels under the influence of the operation of the mixer alternately to the channels A and B of the transmitting distributor TD, represented by the first ten. segments of the transmitter ring 65, and at channels C and D, represented by the next ten segments (from the eleventh to the twentieth) of said ring, alternately, the passage from one pair of multiplex channels to the other being effected by relays 25 and 26.

   The pole relays 24, the respective armatures of which are connected to the segments of the transmitter ring 65, are arranged so as to store the code combinations of the relay bank 10 and to apply a marking or spacing potential. aux: segments of the ring, so that the characters intended to be transmitted by the A and B channels of said ring can be dialed while the transmitter brush 67 is moving on the C and D channels, and vice versa.

   As shown, the labeling potential of channels B and C is reversed with respect to that of channels A and D, so that the. transmission cannot be performed if the dis-

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   Transmitter and receiver tributators are accidentally 90, 180 or 270 out of phase, the phase shift relationship being evidenced by the distortion of the received signals. Of course, the communication is also interrupted by any other phase shift state.



   The transmitters of the respective channels of the multi-channel system may be of any type suitable to operate in conjunction with the distributor of the line and are preferably set up to operate in accordance with the characters stored on a tape or other accumulation agent under control. of the mixer. Each transmitter can either be installed in a subscriber's office and set up to receive tape from a keypad punch, or installed in the telegraph office and associated with a reperforator controlled from a keypad transmitter installed in a keypad. auxiliary network or a subscriber office.



   When the transmitter 36 has finished transmitting the message characters punched in the tape, the channel is automatically disconnected from the traffic line and the service time of the line is divided between the functioning channels. The shortening of the ribbon loop opens the contacts 45 of the auto-stop, of which the relay 46 energizes and locks in series with the electro-stepping of the transmitter 36, the locking circuit comprising the internal armature and the contact 47 of said relay * When the message characters stored in the relay bank 10 by the channel or the transmitter which precedes the transmitter 36 have been transferred to the storage relays 24 of the transmitter distributor,

   the tabs 11-20 and 11'-20 'of the bench 10 are brought onto their spacing contacts

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 by the return coils 32 excited by the local segnent 41 or 42 of the local ring 30.



   The subsequent engagement of mixer arm 54 with latch 56 and energization of electronics 70 operates contact arm 48 as described above, but the stepping electro of transmitter 36 does not operate. is not energized as mentioned in the case during transmission by this channel, given that said electric is locked by contact 47 of the autostop relay. As a result, the frames of the relay baad 10 all remain at the spacing position and the two-character output signal in which both characters include five spacing pulses (blank character) is transcribed by the line of. traffic to switch off the receiving device of that channel in a manner which will be described.

   The armatures 11'-20 'of the bank 10 constitute detection circuits which are established when the input ± and output signals are dialed in the bank. So. when the armatures 11'-20 'are all actuated for spacing and remain in these positions after the mixing arm 54 actuates the contact arm 48 due to the energization of the hitchhiking relay 46 of the as described, a circuit is established between the battery and the earth passing through the armatures 11 ', 12', 13 ', 15', 16 ', 17', 18 ', 20', 19 'and the contacts of 'corresponding spacing, the conductor 90, the electrical circuit breaker 91 of the transmitter mixer TM, the conductor 92, the spacing contact and the armature 14',

   which makes electro 91. When excited, the electro 91 lowers the curved central part of a. leaf spring 93 carrying an offset tab 94, thus bringing

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 this tab below the end of the latch 56, whereby the mixing arm @@@ @ @@@ 93 does not elevate the latch to the position marked in solid lines in Figure 2 and the associated channel is unplugged. While the mixer arm 54 rotates, the remaining channels are switched off upon completion of each message, hereinafter. same way. by the excitation, suitably regulated in time, of the electro 91.

   The latches 56, 56a, etc., are preferably biased towards both their upper stop and their lower stop ± by a spring-loaded toggle device, so that the sole role of the on and off mechanism circuit is to move the latches past the midpoint of their movement.



   The introduction of each channel in the traffic line, as soon as a cane has message characters to transmit, is carried out automatically under the influence of the closing of contacts 45 of the auto stop, as a result. the lengthening of the ribbon loop coming from the associated perforator (or reperforator) * To perform the simultaneous entry of a tram * transmitter at the transmitting station and a receiver at the receiving station, a transmission clock TC and a receive clock RC are provided at the transmitting station and at the receiving station respectively.

   The transmitter and receiver clocks include contact arms 80 and 180, respectively, which rotate at the same speed. For example, these arms can be coupled with (or controlled by) the transmitter and receiver distributors of the synchronous multiplex system. As shown, the transmitting and receiving clocks also include bars

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 turn-on machines 81 and 181 which are also kept in synchronism.

   The contact arm 80 of the transmitting clock is provided with brushes resting on segments 82 and 83 and on a contact ring 84 provided at the periphery of the clock. Each channel is provided with two segments such as 82 and 83, and the receiving clock is likewise provided with pairs of setters for each channel, these segments being arranged in the same order as those of the transmitting clock.



   When the hitchhiking contacts 45 close due to an elongation of the ribbon loop, a circuit is established starting from the earth passing through the contact arm 48, the contacts 45 and the left half of the cable. coil of relay 46, which is in parallel with the circuit passing through the right half of this coil, which de-energizes the auto-stop relay 46, thus opening the blocking circuit by contact 47, but closing, by the contact 49, a parallel circuit terminating in earth at the contact arm 48 of the transmitting mixer.

   When the relay 46 de-energizes, it is established from sagment 82 of the transmitting clock TC a circuit passing through the external armature and the rest contact of the relay 46 and ending in. earth, to the latch 56, through the upper contact 86 which engages with this latch. When the contact arm 80 of the transmitting clock reaches segment 82, a circuit is established between the grounded signal 82 and the battery by the contact ring 84 and the coil of the relay 66, what excites the latter.

   When the contact arm 80 touches the contact sign 83, a blocking circuit is established through this segment and the left armature and the working contact of the relay 66, so that this

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 the latter is kept energized for a sufficient time to ensure that the channel is switched on.



   The energization of the relay 66 closes a circuit starting from the local segment 61 or 62 ,, when the local brush 60 reaches one or the other of these segments, through the conductor 64. the right armature and the contact relay 66, conductor 95, coils 33 of the fourth and ninth relays of bank 10 and conductor 96, to energize the connection electro 97 of the transmitting clock. When energized, the electro 97 lowers the outer end of the circuitry bar 81 of the transmitting clock, which bar is then placed above the latch 56, so that the latter is brought to its lower position, or connection.

   At the same time, as a result of the energization of the coils 33 of the relay bank 10, the input signal is transmitted from the bank 10 to one of the channel pairs of the transmitting distributor TD and the remote receiver is switched on when of the reception of this signal, in a manner which will be described.

   It should be noted that the fact that the local pulse is diverted from the local ring 63, which normally energizes the electro 70 of the transmitting mixer, prevents the transmission of characters through the channel which has been chosen by the transmitter. mixer arm 54, so that the transmission through this channel. is delayed for the time necessary to send the input signals on the traffic line * However. in the next work cycle, the characters that have been retained will be transmitted, since the mixing arm 54 has not been released from the latch of the channel that has been chosen.



   In the illustrated embodiment, the double input signal consists of two characters

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 in which the fourth pulse is a marker and the remaining pulses produce the spacing (character of "carriage return *), The energization of the coils 33 of the fourth and ninth relays of bank 10 brings the armatures of these relays to the on positions. quage, the remaining reinforcements having been brought to the spacing positions by the return coils 32 in the manner described above.



   The dual input signal consisting of two code combinations with the fourth pulse marking was chosen because this selection is ordinarily used for "carriage return" and, if used, this selection does not need to be made. 'be transmitted twice in succession. Obviously, any desired code combination can be used as an input signal, but it is preferable to employ an input signal which is not normally used or which, at least, is not required for an input signal. regular communication. Another useful signal would be a code combination established using characters from a higher set of characters, such as digits, followed by "F".



   In FIG. 3, the receiving distributor RD of the receiving station comprises a receiving ring 109, the various segments of which are connected to the relay coils of the receiver bank 110 and to the local rings 111 and 112. Each of the relays of the relay bank 110 is a polar relay comprising two non-recalled armatures intended to remain in contact with corresponding marker or spacer contacts, after each pulse, until a pulse of opposite polarity is received from the line relay .

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   In this way, the code combinations received by the line are stored by one group of armatures and the other group is arranged so as to smoke protection circuits when receiving input and output signals.



   The cable 120. which is multiple by the reperforators or other receiving devices, comprises ten conductors which are connected by the arms. tures of relay 121 alternately to the right armatures of the first ten relays of bank 110 and to the right armatures of the ten other relays (from the eleventh to the twentieth), of this bank.

   The relay 121 is energized during all the time that the distributor brush of the local ring 112 remains in contact with the segment 122 of said ring, so that the code combinations composed in the second half of the receiving relays of the bank 110 are connected. by cable 120 to a receiving device, while the receiving distributor brush returns the first ten shifts of this bank to position, and the relays last mentioned are connected by the rest contacts of relay 121 and the cable 120 to another receiving device, while the receiving distributor halai resets the remaining relays of the bank (from the eleventh to the twentieth) in accordance with incoming signals.



   The ten selector coils of a reperfor & tor, printer or other receiving device or accumulator are shown at 146, these coils being connected to separate contacts 147 intended for. be simultaneously connected to the battery by the normally open pivoting contact 148 when the latter is actuated by the mixing arm 154 of the receiving mixer RM. If the repunching machine is of the ten unit type,

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 a wide ribbon can be used or the ribbon can be fed two characters during each work cycle.

   Normally open circuits of other receiving devices are controlled in the same way. by the mixing arm 154, under the control of the latches 156, 156a, etc. when the channels are switched on.



  In general, the construction and mode of action of the RM receiver mixer is analogous to the construction and mode of action of the TM transmitter mixer, the latches 156, 156a being lowered from the position indicated by solid lines when the channels are switched on and the mixer arm 154 selecting the receiving channels in service one after another in the same order and at the same time (taking into account the transmission delay) as the mixer arm 54 of the transmitter mixer selects the corresponding transmitter channels.

   The receiving devices of the channels in service are actuated by the momentary closing of the circuits by the contact 148 of the selector coils 146 and of the control electro 149 to print, store or perforate the characters composed at the same time on the connected group of receiver bench relay 110.



   As described above, the input signal which is transmitted by the line to introduce a receiving device into the multichannel system comprises two successive characters in each of which only the fourth pulse is a marker (double carriage return '). This signal can be transmitted either through channels A or B, or through channels C and D, depending on when the clocks TC and RC reach an auxiliary channel which is to be switched on.



   Assuming the input signal is

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 received by channels to and B of the receiving distributor represented by the first ten relays of the receiving bank 110, when the brushes of the receiving distributor continue to move, the circuit of relay 121 is interrupted at local segment 122 of the receiver. distributor.

   When the relay 121 is de-energized during the time during which the storage of the received signals takes place in channels 0 and D of the receiver bank 110, a circuit is established through the upper armature and the contact of
 EMI21.1
 ropoe du y <J * JL3I <1 <M <MMt4 <M wsmuwh <QV4- marker tacts of the fourth and ninth relays of bank 110, the spacing contacts of the first, second, troigièmeo oiquia, 1x1 \ 1 .. ntp \ 1tll \\ t. hult1èu "'" tenth relay of bank 110, the coil of relay 124, the brush arm 180 and the segments 182 and 184 of the receiver clock., the top contact 186, the latch 156 and ground, this circuit energized the relay 124.



   It should be noted that this tour is not
 EMI21.2
 closed only when the% mnsoeission of the input signal and that the position of the brush arm 180 of the receiving clock, when this signal is received, determines that of the
 EMI21.3
 recooteurs devices that must be introduced into the channel, this di spo si. ti f corresponding to the transmitter 36 of FIG. 1 in the case considered The choice of the suitable receiver device or channel is thus determined, as has been said above, by the duration of the transmission of the input signal .

   A short signal with intercalation of service signals thus acts to select any one of a large number of channels.
 EMI21.4
 traffic is used for sessage signals as the clock brushes move and reach the next entry point, which may be several

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 hundreds of characters. The significant amount of time that is needed to make a proper entry is not wasted,
Relay 124 remains locked by segment 183 of the receiving clock, the latter circuit comprising the left armature and the working contact of said relay.

   In the continuation of the movement of the brush arm of the receiving distributor RD, a circuit is established by the local gain 126, the right-hand anlature and the working contact of the relay 124 and the input electro 197 of the l. RC receiver clock. At this time, the receiver clock start bar 181 is above the outer end of the latch 156 and, by pivoting, this bar lowers this latch, as described in connection with the latch. TC transmitter clock.

   The latch 156 is thus lowered to the position marked in dotted lines, which represents the switch-on position of the channel, as soon as the brush arm 180 of the receiver clock RC leaves segment 183, the blocking circuit of the relay 124 is activated. interrupted, and this relay is recalled to the normal state. During the time that the relay 124 was energized, the circuit of the control electro 170 of the receiver mixer RM was interrupted at the right armature and at the rest contact of said relay, which prevented the mixer arm 154 from disengage from the latch with which it was engaged.



   In this way, the characters constituting the input signal on the A and B channels are prevented from reaching a receiving device, and the transmitting and receiving devices are kept in synchronism since, as said above, the transmission of regular character signals by the traffic line is momentarily interrupted during signal transmission

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 entry.

   If the input signal had been received through channels 0 and D of the receiving distributor, the operation would have been essentially the same as described, except that the relay 121 would have been energized when the local distributor brush touches the seg. - ment 122 of the local ring 112 and that the protection circuit used to read the input signal comprises the upper armature and the working contact of relay 121 and the contacts of the second ten relays (of the eleventh to twentieth) of bank 110 instead of the first ten.



   On the subsequent encounter of the mixing arm 154 with the latch 156, the selections stored in one half of the receiver bank 110 are connected by the contacts of the relay 121 to the coils 146 of the receiver device, which is actuated by the closing of the contacts 147 and 148 when the mixing arm 154 is lowered below the latch 156 under the action of the electro 17U, the circuit of this electro comprises the latch 156, the lower contact 187 touching this bar, the right armature and the rest contact of the relay 124 and the segment 126 or 127 of the local ring 111 of the receiving distributor RD. Each of the receiving channels which has been connected is thus put into service concurrently with the corresponding element of the linked transmission channels successively to. the traffic line under the.

   control of the transmitter mixer TM, regardless of the number of channels in service, the entire service time being divided between the channels in service when the number of channels in service exceeds a predetermined value :.



   In such a system, it is advantageous to provide auxiliary signaling or control channels in addition to the channels used for communication.

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 communication. These auxiliary channels can be used for various purposes, for example, for signaling between the operators of the respective offices or to govern the operation of the equipment in any way desired.

   Thus, if one experiences difficulty in receiving at one of the offices, it may be useful to notify the operator of the remote office that he must stop the transmission to that office. If desired, one can use the control channel, for example, to stop the device and reconnect one by one the channels that were in service, from a idle state, so that we can be sure that there will be the same number of ca - transmitters and receivers in service.

   In the system shown, the signaling or control channel is provided with a space on the transmitting mixer, as in the case of each of the communication channels, and the control device is a key switch. 88 comprising contacts which control the input circuit corresponding to the external right armature and to the contact of the hitchhiking relay 46, the button being provided in addition to contacts arranged so as to connect the marking battery to the coil control 31 of the first of the relays of the trans-transmitting relay bank 10.

   Other keys can also be arranged to transmit code combinations serving to perform different functions at the receiving end of the circuit,! in the same way as key 88. When one of the keys is operated, the signaling channel is connected in the same way as one of the communication channels and thus causes the connection of the receiver signaling channel represented by the coils 160 .

   Coils 160 may represent separate polarized relays intended to be

 <Desc / Clms Page number 25>

 actuated in accordance with the application of a marking or spacing potential to the corresponding receiving relays, under the control of the relay contacts of the relay bank 110, in accordance with the state of the control button switches.

   For example, the first relay 160 connected to conductor 1 of cable 120 and corresponding to button 88 is provided with a series of armatures 161 arranged in series with relays with the auto-stop relays associated with the control transmitters. the second station (Figure 3) which are intended for. transmit to the first station shown in Figures 1 and 2 (the contacts 89 in the example shown in Figure 2).



  In this way, the operation of the first relay 160 under the influence of the application of the marking potential to the conductor 1 of the cable 120 opens the hitchhiking relay circuits of the transmitters at the second station and thus disconnects all the transmitters. of the multiple channel system.

   When the control button of the first station is recalled again, the remote hitchhiking circuits of the transmitters in service are closed and, after the transmitters have been connected to the traffic line in the usual way, the transmission is restored *, La.

   receiving station of the. FIG. 3 would also be provided with one or more signaling channels serving to stop the transmission from the. station shown in Figures 1 and 2 or for other desired purposes. For example, one could cause the application of a spacer battery or a spacer battery, as desired, to any of the other coils 160 to operate signals or effect. other functions at the remote station.

 <Desc / Clms Page number 26>

 



   According to another characteristic of the invention, it is possible to make the transmission from some of the transmitters dependent on the operation of the other channels or regular channels of the system. Thus, for example, transmitters 37, 38,
39 and 40 may be delayed communication transmitters and be arranged so as to seize a channel of the multi-channel system only when the number of other channels or regular channels in use is less than a certain value.

   Deferred channels can be exactly the same as regular channels, except that a relay contact 891, 892, etc. of the relay
73 is interposed in each of the autostop circuits of these transmitters, which prohibits the entry or exit of the delayed channels when the number of regular channels reaches a certain value. Transmitters
39 and 40 with different ribbons are five unit transmitters arranged to operate in unison on a multiple channel. Corresponding five-unit reopening devices can be used.



   The various contacts 87 associated with the latch
56 (including those of delayed channels) of the transmitter mixer TM are connected by separate resistors
72, the common terminal of these resistors being connected in relay series with the coils of relays 85, 71 and
73 /. It is obvious that the current flowing through this relay varies according to the number of channels which have been connected. The relata 85 is intended to close a contact when the number of channels in use is less than three.

   Likewise, relay 71 is intended to close a contact when one or more channels are connected, and relay 73 is intended not to close the autostop circuits of the delayed transmitters or special transmitters 37, 38, 39 and 40.

 <Desc / Clms Page number 27>

 that when the number of regular branched cazxals is less than four, Contacts 891, 892, 893,
894 are in series with the autostop contacts of the. same way as contacts 89,
When there is. no channels connected, relay 71 remains on its left contact and mixing arm 54 rotates freely without being lowered by the electro 70 armature.

   When any latch such as 56 is lowered to the channel plugged position by the clock armature 81, it is set by the relay control coil 71, the resistor. 72, earth and battery, a circuit which overcomes the force urging relay 71 towards the spaced state and closes the earth circuit of the mixer control electro 70. Thus, the selector arm of the transmitting mixer plays again its regular function when the first channel is plugged into it.



   If several channels are in use simultaneously, the speeds of the various multi-channel transmitters are relatively smooth. It will be assumed that three channels of the first station will give a satisfactory working speed for each channel, even if the multi-lever transmitter was capable. to keep the circuit completely full.

   In this case, the only busy operator would have great difficulty using the line to the maximum of its service capacity and, consequently, it is interesting to allow the delayed transmitters to share the line when the number of regular transmitters connected. at any time is less than a certain value,
When the number of regular transmitters connected is less than three, the contacts of relay 85 close due to the decrease in the current passing through the control coil.

   This earths the

 <Desc / Clms Page number 28>

 segments corresponding to segnent 82 of the transmitting clock TC, thanks to the addition of contacts of the automatic control slides on the various multiple channels which are disconnected at the instant envisaged. These disconnected channels are therefore reconnected and, since the trans-transmitter mixer TM does not come to a new position during the connection function, the transmission rate is reduced and a sort of regulating device is obtained for the regular channels remaining in service,

   The channel which has nothing to transmit but which is connected in the above-mentioned manner by the operation of relay 85 remains connected until it has had the opportunity to transmit a combination comprising only pulses of. spacing. This removes it from the succession cycle, but another inactive channel is immediately plugged in in its place.



   The successive input and output operations performed on inactive channels govern the speed of the channels in regular service until the need for a branch occurs at a time when the TC transmitting clock brushes are located. on segments corresponding to 82 for one of the delayed channels 37, 38, 39, 40. One will assume that the prepared tape is in place on the stems of the delayed channels and that, when a connection opportunity arises for these channels, the Deferred service transmission begins and continues until connection of other channels increases the total number of connected channels to four or more.

   At this time, due to the preponderance of the control currents over the restoring currents in relay 73, the auto-stop circuits of the deferred service transmitters controlled by

 <Desc / Clms Page number 29>

 this relay are cut, which triggers the output cycle of these transmitters and suspends the operation until the situation of the connected and disconnected channels is again favorable to the transmission of the deferred service.



   The deferred service transmitters 39 and 40 are of the normal five-contact type and, although they are used to transmit two separate messages, their appliances are in series and their operation is in all respects equivalent to that of the transmitters. 37 and 38.

   At the receiving end, the devices for receiving pulses from transmitters 39 and 40 may be ordinary five-unit printers or registerers, both connected to a contact group of the receiving mixer. repeat the description of the regulating action of relays 85, 71 and 73 and associated circuits for the receiving end in connection with the mixer RM and the receiving clock RC, since the times and functions of the branch operations and delayed channels are identical in all respects to. those relating to the functioning of regular channels.



   In systems established in accordance with the invention, various traffic lines may be used, and when multiplex channels are used as the traffic line, more or less than four may be used, if desired. Multiplex channels can use soft or multiple lines or carriers to transmit signals from the transmitting distributor to the receiving distributor in a manner well known to those skilled in the art.

 <Desc / Clms Page number 30>

 job. In addition, other methods can be applied for effecting the entry and exit of the channels of the multiple channel system without departing from the spirit of the invention and various methods for controlling the speed of the transmitters.

   Figures 4 and 5 show a system modified in accordance with the invention which uses a mixer and clock having some analogy to those of Figures 1 to 3 but in which the input and output of a transmitter channel are all two performed by the same signal. In other words, if a channel is plugged in, it is unplugged when the signal is transmitted and, if it is unplugged, it is plugged in by the same signal. This signal can be any character of the alphabet and need not be assigned exclusively to these functions. Moreover, in this system. the traffic line consists of two multiplex channels and the input and output signals are always cross-linked by the A channel.

   Other modifications made to the detailed arrangement of the apparatus will become evident in the course of the description which follows, but it is understood that the system illustrates simply by way of example certain modifications falling within the scope of this description. invention and that many other modifications can be made to the circuit layout and construction of the apparatus, inter alia with regard to the construction details of the mixer and the clock or to. other means for controlling the entry and exit of the channels and the mixing of the channels in use, without departing from the spirit of the invention.



   In the system of Figures 4 and 5, two multiplex channels are represented by the ten

 <Desc / Clms Page number 31>

 segments of the transmitting ring 265 of the transmitting distributor TD, the input and output signals being transmitted through channel 1 represented by the five. first segments of ring 265 in a manner which will be described. The same signal is used to plug and unplug a channel, and this signal is the line drive character and only the second pulse is marked, although other input and output signals can be used, if desired.

   This use of a line drive character or other channel as an input or output signal does not preclude the normal use of that character in communication. Any other combination of codes such as the letter X, changing from letters to numbers or even a blank can be used as the input and output signal, if the circuits have been properly arranged.



   As shown, the transmitters, one of which is indicated at 235, are of the ordinary five-unit ribbon type or other suitable accumulating transmitters of known construction. Each transmitter is connected by corresponding contacta to the C contacts of the transmitter mixer TM and the amatures of a transfer relay 225 to. the first or the second half of the accumulator relays 231 of the relay bank 210 associated with the respective channels of the transmitter distributor TD.

     The first five relays
231 are provided with auxiliary coils 232 for the transmission of input and output signals by the traffic line under the control of the transmitting clock TC when a channel is to be connected or disconnected. bench 210 are fitted with fittings which control the application of the

 <Desc / Clms Page number 32>

 marking and spacing at respective segments of the transmitting distributor; the first, third, fourth and fifth relays of this bench are also provided with frames for a purpose that we will see later.



  Although only one transmitter or channel has been shown in connection with the transmitter mixer TM, it is understood that a series of channels are ordered in accordance with the operation of this mixer as in the system of figures 1. to 3. The elements of the transmitting clock and of the multiplex distributor which are identical to those in FIGS. 1 and 2 have been designated by the reference nanbres assigned the prefix 2, in order to facilitate the explanation of the operation of the system. in comparison with that of Figures 1, 2 and 3. Similarly, in Figure 5, the elements of the receiving end of the channels have been designated by the same numbers as those of Figure 3, but assigned the prefix 3.



   Assume that all channels are unplugged, that the flexible hitchhiking levers are lifted by short loops of tape, and that latches 256 of all channels occupy the raised position marked by solid lines in Figure 4. On It will also be assumed that the rotary elements 254 and 281 of the transmitting clock TC are in synchronism with the corresponding elements of the receiving clock RC (Figure 5) and that the transmitting and receiving multiplex distributors are in synchronism. At one point of his. rotation, the mixing arm 254 contacts a regulator latch 270 shown in the lower part of FIG. 4.

   This latch is intended to be lifted by an electro 271 out of the path of the mixing arm 254, but only when this arm is in the vicinity.

 <Desc / Clms Page number 33>

 of the latch 270 and when the brush 272 of the control mechanism adjusting the regulator in time occupies the zero position as shown, the brush holder assembly of said device is provided with five stop arms or notches intended to engage with a latch 273 controlled by an electro 274, The electro 274 circuit includes the broom arm 272. an annular contact 275 and segments 276 or 277 of the local ring 278 of the multiplex distributor TD.

   With this said position, it is evident that each impulse of the local ring 228 will release the broom arm 272 a notch ,,
The regulator mechanism also includes a contact 279 in series with the electro 2? La so that when the brush arm 272 contacts the segment 279 the electros 271 and 274 will be energized if the circuit is connected to the switch. battery by contacts 290, which are intended to be actuated by the passage of mixing arm 254 and to be held closed as long as that arm is stopped by latch 270. This raises regulator latch 270 and enables mixing arm 254 to keep turning.

   The mixing arm is thus prevented from rotating faster than the brush arm 272, the speed of which is controlled in accordance with the rotation of the brushes of the TD transmitter distributor.



   The role of this arrangement is to control the rotation of the mixer arm 254 of the mixer transmitting @ turn when the number of channels in use is less than a predetermined value. Thus, with the arrangement shown, if there is only one channel in service, the binding of the regulator mechanism with the segments of the local ring 278 of the transmitting distributor TD has the effect that the channel in service not again

 <Desc / Clms Page number 34>

 connected to the system as long as the transmission time of three additional characters by the multiplex channels has not elapsed, It is obvious that the rotation of the broom arm 272 is subordinate to the number of stop arms used and ,

   if it is desired to assign a lower maximum speed to the mixing arm 254, additional arms will be added to the broom. In this way, the number of operations of the sending tracs apparatus in a given time is limited so that it is not necessary for a transmitting unit to be capable of being controlled at a speed sufficient to effect. working the traffic line at full capacity, which would require perhaps two or three hundred words per minute, if this is undesirable, With the governor, the maximum working speed of any channel can be kept very close to the limit for which it was established, even if the speed of the circuit is significantly higher than the speed of the channel.



   Likewise, it will be appreciated that, by properly assigning channels to the preferred and delayed group and by the appropriate choice of relay booster circuits, the speed of the preferred channels can be kept substantially constant regardless of the number of channels. having messages to transmit. This is achieved by limiting the number of preferred channels in the system and by properly adjusting the booster circuits of relays 73 and 85 so that there is substantially no increase or decrease in the operating speed of the preferred channels, which is required. 'only one or all of these channels are in use. To make the traffic line work at full capacity, * there

 <Desc / Clms Page number 35>

 will have. of course big changes in the working speeds of the delayed canals.

   In this way, a group of preferred channels can be obtained at "Constant speed", which is useful for the transmission of market and exchange quotes, press information, etc.



   It is also evident that the stop arms of the governor mechanism may be detachable or in variable number to vary the speed of rotation of the broom 272 in the event that the transmission speed of the traffic line varies by one. day to day. On the other hand, the full capacity of a high speed traffic line is used at all times when several channels are in service without this causing difficulty when the number of channels decreases, If the multiplex was working at a rate of 100 words per minute per channel, a single transmitter in operation would not exceed fifty words per minute with a broom arm having five rest positions.



  If one, two, three or four transmitting channels were in use, the speed would remain at fifty words per minute for each channel. If five trance lying channels were in use, the vibes of the line. which is two hundred words per minute, would give per channel a rate of two hundred divided by five, or forty words per minute. Over a predetermined number of channels in service, the mixing arm 254 acts, at the moment where it is about to reach latch 270, so as to close contacts 290 and energize electro 271 to raise said latch and allow the mixing arm to pass unimpeded.



   The fat mixer 254 does not descend

 <Desc / Clms Page number 36>

   below latch 270 as in the case of a regular channel latch. Latch 270 must be raised to release the mixing arm. When the control pulse lowers the mixing arm 254, the regulator contacts 291 and 292 are controlled without overriding the closed state of the contacts 290, and the relays of bank 210 are thus controlled from the regulator to transmit the space character. by the line circuit (only the third pulse being a marker).



  These contacts 281 and 292 are not essential for ordinary operation, but they may be desirable under certain other conditions. It is obvious that contacts 291 and 292 can be arranged like contacts C to connect to relay bank 210 a deferred service transmitter.



   When a sufficient quantity of tape has accumulated on any channel, for example at transmitter 235, the autostop contacts 245 close and the channel connects to the multiple Banal system under the influence of this. action. So,. when the contacts 245 close, a circuit is established comprising the earth, the latch 256, the upper contact 257, the autostop contacts and the segment 282 of the transmitting clock TC.

   When the proper time measured by the clock has elapsed, a circuit is established starting from segment 282 and passing through the coil of input relay 221, which energizes this relay, which is blocked when the clock brush 280 reaches segment 283, the blocking circuit comprising the right armature and the working contact of relay 221.

   While brush 280 is in contact with segments 282 or 283 of the TC transmitter clock, the battery is applied by a

 <Desc / Clms Page number 37>

 local broom of the TD transmitter distributor via seed 266 (or 267) of the local ring
263, which establishes a circuit starting from one of the ten segments and passing through the left armature and the working contact of relay 221, the coil of the input and output electro 297, the upper coil of the re - polarized layer transpositor 226, the relay coils
232 and earth, electro 297, the first five relays of bank 210 and relay 226 are energized.

   The first relay of bench 210 pushes back its reinforcements 211 and
211 'to the right; the second, third, fourth and fifth relays of bank 210 push or hold their armatures to the left and the two armatures of transposing relay 226 come into contact with their right-hand contacts. Due to the excitation of the input and output electricity 297, the horizontal roller pivotably mounted on the end of the control arm 281 lowers onto the triangular protrusion of the related latch 256. to the channel which needs to be connected, this latch being thus lowered to its lowest or working position, When the local broom leaves segment 266 (or 267)

   of the local ring 263, the control bar 281 is returned to its. normal position, the roller r then occupying, with respect to the triangular projection of the latch 256, a position such that, during the subsequent control of the arm 281, the latch rises to the position marked in solid lines on the figure 4.



   Due to the described operation of the relays of bank 210 and relay 226, a positive or gap potential is applied to the first, third, fourth and fifth segments of the transmitter ring 265 of the TD transmitter and a negative potential. or marking is applied to the second segment

 <Desc / Clms Page number 38>

 of this ring * At the desired times, the distributor brushes will thus transmit the character '' line drive (willow the second impulse being a marker) to. from channel A.

   It should also be noted that the establishment of an input signal by the fact that the sixth pulse is diverted by the left contacts of relay 221 to the relays of bank 210 does not establish the protection circuit by armatures 211 'to 215' of said bank since this circuit is open to armature 211 '. It follows that the protection circuit closes only when the "line drive" character is transmitted by one of the transmission channels when the channel 4 of the TD multiplex distributor is in service,
Mixer arm 254 is then released by raising regulator latch 270 and, shortly thereafter,

   this arm engages with the lowered latch 256 relating to the switched on channel represented by transmitter 235. A connection is then established between the local brush of the TD transmitter distributor and segment 266 (or 267) of the transmitter. 'local ring 263, which establishes a circuit through the left armature and the NO contact of relay 221, the lower coil of the transposing relay 226 and the electro 27U' of the mixer transmitter TM.

   The mixing arm 254 lowers to release itself from the latch 256 and momentarily comes into contact with the internal end of the contact arm 248, the normally open contacts C which connect the transmitting tabs of the transmitter 235 to the relay bank 210 being then momentarily closed.

   The setting of the tongues of the transmitter 235 corresponds to the character to be transmitted, and the code combination is directly transferred by the circuit described.

 <Desc / Clms Page number 39>

 above, comprising the contacts C and the armatures of the relays 225, to the relays of the bank 210. At the desired moment, the transmitter brush touching the transmitting segments of the transmitter ring 265 transmits the character via the traffic line. If desired, the transmitter can be set up to transmit multiple characters, cam diane the embodiment of Figs 1 to 3.



   On completion of the sixth pulse which activates the electro 270 'of the transmitter mixer, the mixer arm 254 rises and rotates under the action of the control clutch (not shown) until its stop point Next, which is regulator latch 270, since it is assumed that no other channel is plugged in at this time.

   As explained above, the mixing arm 254 is maintained at this point until the time when the regulator time adjustment device terminates a circuit of the commando electro 270 '. controller, the mixer arm 254 then being released again to transmit another character from the transmitter 235, in the same manner as described above.

   The transmission of each character from the transmitter 235 is effected in part by the oscillating movement of the contact arm 248 of the transmitter mixer and, according to the present embodiment of the invention, this periodic movement of the contact arm 248 is used. to operate a counter 242 so as to count the number of characters transmitted for the. taxation.



   If during message transmission a "line drive" character of which only the second pulse is a marker passes to the lower half of the relay bank 210, this character is found.

 <Desc / Clms Page number 40>

 transmitted unchanged via the B channel of the TD multiplex distributor.

   However, if the transfer relay 225 is energized and thus connects the upper bank half 210 to the live channel when transmitting the "line drive *" character, the detection circuit comprising the frames 211 ', 213 ', 214' and 2151, of the upper half of bank 210 closes, establishing a circuit including the battery positive, the coil of relay 227, the armatures of bank 210, the lower or reset coil. position of relay 226, the coil of electro 270 'of the transmitter mixer and earth. The electro 270' energizes and keeps the mixer arm 254 lowered, so that the character "line drive" is found. again applied to bank 210, in this case to the lower half of this bank.

   Closing the circuit described above re-establishes relay 226 and energizes relay 227, whereupon the second segment of the transmitter ring 265 of the transmitter distributor is disconnected from the negative or tag potential and connected to the positive or negative potential. spacing. Thus, the attempt to transmit the input signal on channel A directly from the transmitter is prevented by substituting a blank signal for the input signal of the channel. However, the "practice" character line * which is used for entry in the particular embodiment which has been described can be transmitted by the B channel, and it is moreover transmitted by this channel when it is intercepted and prevented from being transmitted channel A.

   This arrangement has the advantage that the characters ordinarily used in the transmission of messages can also be used as input or output signals but are not transmitted.

 <Desc / Clms Page number 41>

 by channel limited to. the transmission of input or output signals, although they are not lost "since they are then transminated by another channel,
It is evident that combinations of the character "line drive" can be used as described above either as functions effecting entry or exit or as intended signaling combinations. for any other desired use. So,

   any character could be used for a special purpose if it is transmitted through channel 1, whereas, if it were transnised through channel B, that character would have no meaning, except as message character4 As we have. Said, all the combinations of this kind which occur in the regular transmission of messages will be momentarily retained if one tries to transmit them by the channel .L As these characters will be later repeated by the channel B, they are not lost.



   When the local brush of the transmitter distributor then touches the segment 229 of the local ring 230, the coil 232 of the first relay of the bank 210 is energized, so that it actuates Par ... mature 211 'and de-energizes the relay 227 and electro 270 'operating the mixer. The mixing arm is then enabled to advance to the next stop position. When the message transmission in transmitter 235 is completed and the left hitchhiking contacts 245 close, the transmitter 235 may not stop immediately because the output or disconnection of a channel is. rarely done at the same time as the hitchhiking contacts command.



  The hitchhiking mechanism is arranged so as to allow

 <Desc / Clms Page number 42>

   the. transmission of a small number of additional characters if the disconnection does not take place immediately, which is obtained for example by providing a flexible extension 246 on the hitchhiking lever. When the left-hand hitchhiking contacts close, the earth potential is then applied to segment 282 of the transmitting clock TC by latch 256 of the mixer. At the desired moment, the brush arm 280 of the transmitting clock TC touches the segment 282, thus actuating the input relay 221 in the manner described above and transmitting the input and output signal via the A channel of the multiplex distributor.



  The input and output electro 297 of the transmitting mixer is again energized as described above and, due to the position of the triangular projection of the latch 256 relative to the roller r. the latch then rises to the channel disconnection position.



   Shortly after entry or exit has been made to the switch of the transmitting clock
TC, the clock sweep arm 280 is traversing a long dead segment as the multiplex transmitter sweep is passing over the conveyor segments of channel B. It follows that it cannot. be ordered or made no entry or exit as such on channel B.



   The mode of step-by-step drive of the transmitter 235 will now be described. The electronic control SM of the transmitter is connected to the positive by the contacts of a relay 241 serving to actuate the transmitter. This relay is closed by the pulse or charge of a capacitor 243 immediately after the transfer of a code combination made up in the transmitter to the coils of the relay bank 210 by the contacts C.

 <Desc / Clms Page number 43>

 



  It goes without saying that the electro SM of the transmitter de-energizes when the code combination has been dialed as in the case of the ordinary ribbon transmitter described above with regard to the system shown in Figures 1 to 3. When a different type of transmitter is used, it is obvious that the circuits will be arranged so as to work in conjunction with such a transmitter.



   In the system shown in Figures 4 and 5, the transfer of a code combination from the transmitter to the relay bank 210 is effected when the mixing arm 254 lowers and pushes the contact arm 248. At this point, the capacitor 243 discharges through resistor 244. When the electro 270 'actuating the mixer releases the mixer arm 254, a spring recalls the contact arm 248 and the load capacitor 243 in series with the relay 241, thus transmitting a control pulse to the electro SM of transmitter 235, which pulse can be as long or as short as desired, depending on the electrical constants of the circuit.

   Thus, the transmitter 235 is actuated, stepped, released and prepared to transmit the next character punched in the tape. These operations require a determined time interval which, however, is independent of the operation of the mixing arm 254 and not will not delay the rotation of this arm towards the latches of the other channels * Thus, the cyclical operation of the mixer control electro 270 can be accelerated since it suffices for the mixing arm to momentarily operate the contacts C if one uses sensitive relays in the relay bank 210.

   It goes without saying that the mixing arm 254 must be able to make a complete revolution in the time necessary for the transmitter brushes of the TD distributor to pass on a channel

 <Desc / Clms Page number 44>

 multiplex.



   Each of the transmitters or channels of the multi-channel system has, on the mixer and clock, a position similar to that described for transmitter 235 and each of the channels is connected and disconnected in the same manner as that described for transmitter 235. deorite above concerning this transmitter, It will be further noted that the characters are transmitted from the transmitter (s) in service alternately by the A and B channels of the multiplex by the cyclical operation of the transfer relay 225, which is energized and de-energized in a time suitably set with respect to the movement of the transmitting brushes of the transmitting distributor by the sign 228 carried by the local ring 230 of this distributor.



   Referring to Figure 5, when an input signal is received through channel A of receiving ring 309 from receiving distributor RD, that signal is camped in the first five relays of bank 310 at the second station. Assuming that the input signal is the line drive character, the armatures of the first, third, fourth and fifth relays of bank 310 will be thrown to the space position and the armatures of the bank 310. Second relay of this bench will be projected to the marking position.

   The protection circuit is then closed by the left annatures of these relays and, when the local brush of the local ring 311 touches the sign 313 of said ring, a circuit is established by this sign, and the armatures left of the first five relays of bank 310. which circuit energizes the input and output electro 397 of the RM receiver mixer. The energization of the electro 397 activates the catch 356 of the receiver device corresponding to the transmitter which was connected to the first one.

 <Desc / Clms Page number 45>

 station.

   When the receiving brush of the RD receiving distributor touches the receiver signals of channel B, the character being transmitted is dialed in the lower half of bank 310 and, the transfer relay 321 being de-energized, this character will be transferred from the contacts of said relays of bank 310 to conductors 322 which are multiple by the receiving devices.



   As mentioned above, the mixing arm 254 of the transmitting station jumped a notch while an input pulse was being transmitted through channel A. As seen on Figure 5, the receiving mixer arm 354 similarly jumps up a notch when an input pulse is received by channel A and an input is being made by electro 397, since the normal control circuit of the electro 370 'comprises the marker contacts of any of the first, third,

   fourth or fifth relay of relay bank 310 and that segment 313 of local ring 311 of the receiving distributor is open when receiving an input signal arriving through channel A but is closed for all other combinations of code received by this channel except the "blono" or the combination entirely composed of spacing pulses.



   As has been described, false input signals sent from a transmitter through channel 1: .. have been converted to "blanks" and, retained for subsequent transmission through channel B, given that, although they were not intended for input signals, they could have been transmitted for some other purpose. The code combination of the "blanks" dialed on the upper half of the relays of bank 310 similarly maintains open the circuit of the electric mixer 370 ',

 <Desc / Clms Page number 46>

 However, when the input signal is repeated on channel B, the electro 370 'operating the mixer is energized directly by the segment 314 of the local ring 311 of the receiving distributor.

   On the other hand, it is obvious that the reception of a "blank" or of a code combination composed exclusively of spacing pulses on the upper half of the relay bank 310 does not effect the reception. 397. Input and output electro excitation 397. The "white" input signals and any other code combinations received by channel B of the receiving distributor RD are stored in the lower half of the receiver bank. 310 and transferred to the receiving or printing devices by the annunciations of the transfer relay 321 and the contacts 347 of the respective channels of the receiving mixer RM.



   Mixer arm 354 of the take-up mixer rests against latch 356, 356a of any channel that is plugged in. The mixing arm is rotated by means of a clutch, as in the transmitting and receiving mixers of Figures 2 and 3. The mixing arm remains in engagement with one of the 10 quarts until it is lowered by. the electro 370 'to release the latch, this arm then coming into contact with the pivoting contact arm 348, which momentarily closes, through the contacts 347, the circuits of the electro selectors 346 and of the control elecjro 349 of the device storage receiver or printer. In this case, an ordinary multiplex printer with five electrodes or tape reperforator can be used.

   On completion of the control pulse intended for the receiver mixer control unit 370 ', the mixer arm 354 rises, the contact arm 348 is returned to its normal position by a spring and the them. printer connections

 <Desc / Clms Page number 47>

 with the relay bank 310 are cut at contact 347.



   On short lines where the possibility of mutilated line signals is very low, it is not economical to provide mechanisms to reduce the possibility of false or false input or output signals. To facilitate the correction of such signals, On lines which are prone to interference, it may happen that communication characters transmitted by a channel to can be modified by induction or in some other way. a degree such that occasionally one of these characters is converted into an entry or exit code combination.

   All the input or output signals likely to arrive as such on the channel .. actuate the latch of the receiver mixer which they bring to its second position, that of the latches which is thus actuated depending on the position of the mixer. clockwork mechanism at the moment when such a false input or output signal arrives ,, It is obvious that the possibility exists that a receiving channel is accidentally plugged in or unplugged while the corresponding transmitting channel is not plugged in or unplugged., as a result of interference or other line disturbance.



   To help correct the drawbacks likely to result from this state of affairs without significantly modifying the circuits of Figures 4 and 5, it is possible to use a latch such as that shown in Figure 6. This latch 384 is mounted in the transmitter mixers. and receiver replacing latches 256 and 356 and takes the place of two of the ordinary latches. Two clock channels are used for each latch modified in this way. If a channel

 <Desc / Clms Page number 48>

 multiple asks. be plugged in when the brushes - one of the transmitting clock occupy / of their positions, input pulses are transmitted but can only confirm the plugged-in or unplugged state, in the operating position of the special latch .

   When the transmitting clock sweep arrives at the next group of segments, another input pulse is transmitted which makes the input to either of the transmitting and receiving mixers. One of the ends 385 of the latch 384 has a shape suitable for acting in an entry or downward direction and the other end 386 is intended to act in an upward or outgoing direction. If the armature of the input and output electro tried to actuate downwards, by the informed diary of the projection 385, a latch 384 which happens to have already been lowered, the movement would be completely ineffective since the electro armature roller would not act on the cam surface of projection 385.



   Likewise, if the armature of the input and output electro were to attempt to actuate upward, through the projection 386, a latch which has already been = raised, the movement would be ineffective and would simply confirm that the channel a. The two adjacent transmitting clock switch segments corresponding to dual latch 384 would be assembled so that, in effect, the transmitting clock switch segments would use twice the space of an ordinary channel.

   Of course, it would not be necessary for all the latches of the transmitter and receiver mixers to be of the same type, for example of the type shown in FIG. 6, since some of said latches could be of this type and others of the same type. type shown in Figures 4 and 5, the latches

 <Desc / Clms Page number 49>

 special channels being used on the most important channels, for example signal channels,
Another arrangement to achieve the same result as the latch 384 of Fig. 6 but without the use of specially constructed latches would include means for rotating the ratchet outward during one turn. control arm 381 and to rotate it inward during the next turn,

   This would make it impossible to enter a channel during the first round or exit from a channel during the second round. An electro can be arranged so that it rotates the arm to which the roller r is attached, or the roller holder arm can be extended through a guide plate 387 (FIG. 7), the internal and external slots or paths 388 of which are arranged. so as to rotate the roller to the entry and exit positions above the latches during the alternating rotations.



     The joys of systems produced in accordance with the invention and which have been described above possess remarkable advantages both from the point of view of the simplicity of the electrical circuits and of the control apparatus and with regard to the possibility of adapting the system to the problems involved in the transmission of telegraph messages. The system allows different kinds of messages, signals, etc. to be transmitted and received in a simple and efficient manner and to use the full capacity of a traffic line even if the number of channels in use is relatively small. . The improved methods of effecting entry and exit present advantages which will be evident to those skilled in the art.

   In addition, the. traffic line may consist of two or more wires, channels or

 <Desc / Clms Page number 50>

 carriers.



   Several embodiments of the invention have been described to explain the principles on which it is based, but it is evident that the invention is capable of receiving other embodiments and numerous modifications without departing from its spirit. .



    CLAIMS
1. / A telegraph system of the multichannel type comprising a traffic line and a series of auxiliary channels, with means for associating the auxiliary channels occupied with said line, the means in question comprising a particular mobile organ for each channel auxiliary, each oane being movable from a position corresponding to "connected channel" to a position corresponding to "disconnected channel", and reciprocally, a channel selector bar, movable with respect to said members and entering into engagement with them in one of said positions, and a contact device for each auxiliary channel, this device being jointly controlled by said members and by said selector bar.



   2. / A telegraph system as claimed in 1, in which the moving parts individually assigned to the auxiliary channels are brought to the branching position by a synchronous clock hand or arm moving opposite the aeration of parts in a predetermined order and only controlling the respective members when the corresponding auxiliary channels are to be introduced into the dry line.

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


    

Claims (1)

3. / A telegraph system of the multi-channel type comprising a certain number of code transmitting devices and means for putting into service <Desc / Clms Page number 51> of these devices and to vary the number of devices in service, these means comprising a selector arm and a series of movable bars or latches which, in one position, trigger the operation of the associated device when the latches are actuated by the arm. selector. 4. / A telegraph system as claimed in 1, 2 or 3, wherein a device for moving the movable bars or latches comprises a single control bar for bringing any latch to either of its respective positions, or a pair of arms ( or bars) one of which is arranged to bring a latch to one position and the other to move the latch to the other position. 5. / A telegraph system as claimed in 3 or 4, comprising a rotary arm intended to act on the latches and carrying a tab for restoring the latches in position, and means for causing said tab to move from its normal position to a position in which the movement of the arm: restores a latches in position. 6. / A telegraph system as claimed in any one of claims 3 to 5, comprising a rotary member whose movement is prevented when the movable members, i.e. the latches, occupy the channel branching position. , and the means for putting the corresponding transmitter device into operation when the movement of the rotary arm is thus prevented. 7. / A telegraph system as claimed in 6 in which means are provided for the relative movement between the rotary arms and the latches to operate a switch assembly and for varying <Desc / Clms Page number 52> the number and the. duration of the operations of this set. 8. / A telegraph system as claimed in 4 and in any one of claims 5 to 7, wherein each movable latch carries two lateral projections having cam surfaces placed in opposite positions; a control member is intended to engage with one or the other of the projections of any one of the latches in order to pass them from one position to another. 9. / A telegraph system as claimed in any one of claims 1 to 8 comprising a series of transmitting and receiving devices associated with the respective ends of the traffic line and means for dividing the time of the line. between the transmitting and receiving devices in service and comprising mixers at each of the ends of the line, each mixer comprising a series of mobile organs, one for each auxiliary channel, each of said members having two corresponding operating positions respectively when connecting or entering the channel and when disconnecting or leaving the channel, and means for simultaneously moving the corresponding members of the two mixers at the moment when each auxiliary channel is connected. 10. / A telegraph system of the type to. multiple channel comprising a traffic line and several auxiliary channels associated with means for connecting selected auxiliary channels to the line while omitting other auxiliary channels, these means being arranged to invariably connect the same number of auxiliary channels to the traffic line i c. II./ A telegraph system of the multiple channel type comprising means for transmitting message signals between two offices and means for interposing <Desc / Clms Page number 53> signaling and / or control pulses with the message signals. 12. / A telegraph system as claimed in 11, comprising a series of transmitter channels for the transmission of message signals and one or more signaling channels associated with means for causing the entry of one or more channels. signals in the system and their output from the system in much the same way as for the transmitting channels. 13. / A telegraph system as claimed in 11 or 12, comprising means controlled from one office and which have several auxiliary receiving channels serving to stop transmission from all transmitting channels located at another office. 14. / A multiple channel system comprising a traffic line and a series of auxiliary channels intended to work on said line, these channels comprising dgs transmitting devices provided with contacts, a control device for the transmission of a ds signal. input via the traffic line and means for intercepting code combinations corresponding to said input signals which originate at the contacts of the transmitting devices. 15./ A telegraph system as claimed in any one of claims 11 to 14, in which an input signal and an output signal are used, any one or each of the signals consisting of a combination of codes. with several characters, and in which means influenced by each signal act to connect an auxiliary channel to a traffic line or to. unplug it. 16./ A telegraphic system as claimed in 15, in which the elementary parts of the input and (or) output signal are transmitted by different multiplex channels of the traffic line. <Desc / Clms Page number 54> 17./ A telegraph system as claimed in any one of claims 11 to 15, of the kind in which a series of synchronous multiplex channels of the traffic line is used, characterized in that the input signal and (or) output is transmitted invariably by one and the same multiplex channels. 18. / A telegraph system as claimed in any one of claims 1 to 17, comprising a transmitter located at an office associated with the multiple channel system and a line terminating at a second office associated with means for transmitting character signals, through said line, from the second office to the first office, and a signal accumulator apparatus disposed in the first office and associated with said transmitter for storage. link the signals transmitted by said line, so that the character signals from the second office are repeated by a channel of the multiple type. 19. / A telegraph system as claimed in any one of claims 1 to 18, comprising integrator devices relating respectively to the various auxiliary channels and influenced by the message signals transmitted to charge the service on each auxiliary channel. 20./ A telegraph system as claimed in any one of claims 1 to 19, comprising a signal accumulator device and means for operating it under the influence of the charging or discharging current of an associated capacitor. to this device. BRIEF SUMMARY A telegraph system of the multi-channel type comprising a traffic line and a series of auxiliary channels with means for associating the auxiliary channels occupied with said line, the means in question comprising a mobile device specific to each auxiliary channel, each <Desc / Clms Page number 55> member being movable from a position corresponding to "connected channel" to a position corresponding to "disconnected channel", and vice versa, a channel selector bar, movable with respect to said members and engaging with them in one of said positions, and a contact device for each auxiliary channel, the device being jointly controlled by said members and by said selector bar.