BE454860A - - Google Patents

Description

       

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   AUTOMATIC SWITCHING SYSTEM APPLICABLE TO TELEPHONY
The present invention relates to an automatic switching system more particularly applicable to telephony.



   In known automatic telephone systems, the search for the calling subscriber is carried out: either by researchers linked directly to connection circuits, or by researchers linked to other researchers whose aim is to search and connect to the telephone. requesting station via the primary searcher, a connection circuit; or by researchers researched by other researchers linked to connection circuits.

   With a view to reducing, within wide limits, the number of organs necessary for carrying the traffic, the present invention is based on the combination of two systems: one, which assigns connection circuits, connections. seekers directly connecting the requesting station to the connection circuit, the other, which connects the connection circuit to the calling station through the searcher of the connection circuit connected to the connection circuit and searching for a call seeker, this last looking in turn for the line in appeal ...

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  Searchers assigned to call searchers are only taken when turn! researchers assigned to
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 connection circuits are busy. Usually CO.l; j18nde
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 and the termination of these researchers is carried out either by means of a device prepared for each researcher, or by means of dis -
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 positive coizxuns at..an certain number of researchers, a uÉi:; r researcher not having access to several coii .. i 1 ':: 1 nd 8.
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  The present invention is characterized by the use
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 General organs called "recorders" whose role is to c :: 1nandér cortroler and guide the researcher of the circuit
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 connection and the call finder. Multiple recorders
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 can control and co;.,. 18nder a r.lê: the researcher of the disconnection circuit, or a: 'lê, 18 call seeker and the organs of C', C7ï7: c'tnCle of stop and test of these researchers are the ne: tes C \ li efiectucnb: '. us.3i 1 <, CO: ': 1: 12nclo l stop and test the selectors pt con'lscteul'.3. The T-horn; Lande, the stop and the test of the searchers, selectors or connectors are done by three wires, the., I; aintien de'3 organs by a qu3'bric; 'tG wire. These wires can be used by others; ';' J;: [GS, when the connection has taken place.

   The conversation threads and the conpt :: ur thread by e; e :: p] .e are among these three threads. These wires serve Ó.81C "slow 18 el-Lljcri, '. 1Ína tion of the requested stations having several links () 188. They allow stopping on a free line belonging to the called group, if the nUl: 1ÓrO corlpose is that ôo le *, pre '.i; r; 1i [,; n8 iJt unique ".ont on the li; .91o called without search dn free lij.xe, nor the nu '' - Lérc compound is a nu; .iéro avztrc that clui of the pre, -, i01 'o lic; ne ..



  The principal m, r'nt,?, ¯, e resulting from the particular enpioi do i! Cnr:) c; L - :: L .'- :-) ur, following the conception of the present patent, lies in the possibility of accessing a certain number of circuits of) connsxicn (each of them being able to be reached by several eor..yi ^ vrcu> s ;, to control the position of the different selnctcul'S placed at the different stsjes selection, so that d8G connect.'urr ;, without it being necessary to use any 8utr3 intermediate organ which is used cc i.rai: x.icnt.



  We know that such an exclusively assigned auxiliary orc; arrJ, either t a selector, or;: a group of select <:; ui s, 1'oc:; oit. the 1:, j? uliJ: 1, year: 'ÜS <.08 by the dial of the calling station and narquc the position on Ijquolle it directs the selector or the connector.



  IQS son of counter.'e linked to 61; '1 & Ul'>. @ Qt: to 121 '\ 11 ti 1'1.1é pnl "éts.r, e selection on all recorders. It is for' An'te for
 EMI2.9
 the connector control wires.
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  The role and constitution of 1 fenreizistoeour, which represents the essential part of the achievement of 'present
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 patent, are defined by the following considerations:
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 Lifting the calling set first causes
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 the start of the recorder via the rolais
 EMI2.14
 call and cora relays: mns of every hundred. It rzch31? C; qe

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 an available connection circuit and is associated with it for the duration of its intervention, the recorder making
 EMI3.1
 at some point at this time, constitutive part of the connection circuit which is located at 1 or placed under the exclusive central unit of the recorder, the latter itself being under the control of the deuarrase circuit.



   The recorder then performs three distinct functions, the first of these functions being the only one related
 EMI3.2
 synchronously with the other two:
The first function is the preselection * The recorder directs the searcher of the connection circuit with which it is temporarily associated to an available call searcher, on the arc of which the line in call is located.



   If the connection circuit has an electrical connection with a call seeker, the recorder only ensures the orientation of this seeker. As soon as the call finder has encountered the on-call line, the recorder engages with it and comes under the exclusive control of the calling subscriber. All the other recorders requested by the starting circuit and which were associated with free connection circuits are considered as eliminated and left available for other calls.

   The recorder engaged with the subscriber in call is the one whose call researcher with whom he was
 EMI3.3
 enga / 58, was the first to reach and test the calling line. The meeting of the calling line by the recorder (through the connection circuit and the call finder) has the effect of replacing the dialing relay of the '' recorder at the line call relay, for supplying the station,
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 ,, 7Landeuré From this point on, and until the end of the selection, the calling line is looped exclusively to the dialer relay of the recorder. The recorder is then in progress. the transmission signal in the do earpiece
 EMI3.5
 the requesting subscriber 1Dgr]. 'initiate dialing.



   The other two functions are two separate functions which are not synchronously linked to each other.
 EMI3.6
 On the one hand it receives (through the call searcher, the connection circuit, the recorder searcher), and records the call impulses sent by the station of the
 EMI3.7
 requesting subscriber. The reception of these pulses must be wiped out even in the most unfavorable cases. For this purpose, they are received by a pulse corrector device,
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 ! .1 mounted directly in series with the line and the dial, which helps to ensure the safety and. The sharpness of the reception by the digital elements. The impulse relay retransmits to the digital elements the impulses sent by the station of the calling subscriber.

   Each digital element being connected to the pulse relay at the time required to receive the pulses of the digit 'it represents, The elements which received the previous digits are disconnected, while
 EMI3.9
 that the elements which are to receive the subsequent digits are not yet connected.

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   On the other hand, as it receives and records the digits of the requested number, it causes and controls the selection constituted by the movements of the selectors and -connectors by limiting these movements in accordance with the positions taken by its elements at the following receipt of call pulses. This second function, which is based on the knowledge of the number of the requested subscriber, performed by the elements of the recorder, takes into account the constitution and the state of occupation or
 EMI4.1
 enconbroment of the network of junctions.

   For that / he pr'd - vaque and control the rotation of the selectors and connectors, the stop on the level determined by the position of each digital element or by the combination of these positions, the search for a free line in the level consider connecting searchers, selectors, or connectors on the designated line. These different functions, identical to each selection stage, are fulfilled in the recorder
 EMI4.2
 by 10r: same organs.

   It allows 10 forwarding, either in 8ccmpatian, or on special lines placed at any point of the selection stages, when the selector has explored at least once all of the lines forming the designated level, without finding any do. free,
 EMI4.3
 According to the figures received, c'08t-airG according to the position of the digital elements, the recorder connects the first selector with the call finder, through the intermediary of the connoxion circuit and its finder, of tollo so that colui one can 'be found in one of the three cases below doSIJOUG: 1) - L .; set andclar is supplied, the called set has rang and a counting pulse occurs when the called set goes off hook.
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  2; - :The; calling station is supplied, the called station is ('1 i' l Jnt6, without ringing, there is no cociJta6c (the counter wire is extended on the selectors).



  3) - Researchers and selectors law are connected "1'3tolliquo'lcnt, without any derivation, the relay used for this connection can remove 1 ',). -Aint (, nu, as well as the ch relays,; r2h.; Urs and selectors, by the internéc1.i - area of another organ to which these app & rcils can be linked.
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  After connecting the calling line to the se line, the GNR <.-; ', istrour is released, leaving the chain of devices used under the control of the connection circuit, no djrnior being placed during the call of the called subscriber, under lc ton-brolo at <: 1'E ,,, Don-born d, <;:.; anàcur. under the control of the calling subscriber.



  In case of early release, caused by hanging up the dc'andcur subscriber, before the connection is established by the 3nrogistrcur, the latter is released,

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 releasing in turn all the organs already used for the establishment of the communication.



   The released recorder can then serve other calls.



   The present invention provides a particular embodiment of the "connection circuit !!". This device is made up of only six relays. Placed first of all under the control of the recorder, the connection circuit extends the latter by l 'intermediary of the connection circuit searcher and the call searcher, to the call line.



  It acts as the link between the calling line and the recorder for receiving and recording the requested number. On the other hand, the connection circuit ensures the link between the recorder and the first selector for the progressive selection of the requested line. After connecting the first selector with a free connector, the link is still established between the recorder and the connection circuit, but is extended by the first selector and the free connector encountered towards the line to be reached At the end of the selection and if the requested line was found free; the recorder becomes free, the connection circuit then passes under the control of the calling subscriber.



  The connection circuit which hitherto played a passive role in ensuring the links, actually comes into action as soon as the recorder is released. It then supplies power to the calling station and to the requested station, calling the requested station, counting by sending a pulse to the counter of the calling subscriber upon the response of the requested subscriber. : It "also makes it possible to ensure the connection between the calling set and the called set, without there being either automatic counting or automatic calling of the called set.



   -'The counting can be controlled by a device in conjunction with the selectors: -
It also allows the metallic link between the searchers and the selectors, the maintenance being possible on the third wire:
Release can take place without increasing the number of devices, but by moving the straps, either by the first set to hang up, or by hanging up the calling set, or by hanging up the requested set, or by the last set to hang up:
The present invention allows, by closing the stop circuit on a clean rectified current supply circuit, the wire-to-wire mixing of all the control wires, by selection stage;

   with all recorders
The use of this device, placed in an organ common to other individual organs, for the

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 EMI6.1
 control of these individual organs or the c7.orane test; s individual, comes within the scope of the invention, even if they are organs having functions different from those described in this patent,
The present invention also envisages the judicious distribution of the power supplies for the researchers, selectors and connectors with the aim of eliminating the protection members (fuses and thermal coils) in these members and of centralizing them in the recorder.



   The present invention also relates to the possible use of a traffic distributor member which puts
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 on the recorders at the stall of the spawning spawner.



  This unit controls the search for the line in Call. The number of recorders put into operation simultaneously is equal to the number of traffic distributors requested by the line in call.
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  Finally, "one of the features of the invention is the possibility of using secondary line switches, either after a first selector, or between two selection stages, these line switches being controlled by the recorder connected to the connection circuit, meshed with the considered secondary line switch.



   The various characteristics of the invention described above and others will emerge and
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 will be better com. ,, r-sse by referring to the following example of application, not limiting, of the system and the various figures attached to the text: - Figure 1 is a schematic set of
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 organs entering an ocmmunicntion.



  - Figures z: - 3 - 4 - 5, are detailed diagrams which are 00mpl, "t'3nt mutually and are connected according to the layout of figure 1.



   - Figure 2 shows the two partial relays
 EMI6.6
 at each station, the equipment of the call searcher, the equipment of the connection circuit with the searcher of the connection circuit r = t the first selector, the equipment of the remote selector and that of the connector.



   - Figure 3 shows a traffic distributor.



   - Figure 4 shows a recorder.
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  - Figure 5 represents 1 t.pl, ^ rr .: il d 'elh, 1ontation in rectified current, assigned to each recorder.



   - Figure 6 shows the particular soft relays
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 1: 1 gold at each IJoste; 10 researcher of the connection circuit, the common rolais for 100 stations, used to transmuttro the start-up on call seekers, when all

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 the researchers of the connection circuits assigned to the hundred are busy.
 EMI7.1
 - Figure '7 shows a line switch 1:! 8oond ", ir', accessible to the first selectors.



     - Figure '8 shows a secondary switch
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 line between two selection steps.



     All the `` organs entering '' the establishment - set up of a communication, shown in figure 1, are essentially composed of: a) - The calling station P, its line equipment, (call relay-and cut) R.
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 b) - Narohe relays G. c) - From the traffic distributor H with its finder X 7. d) - From recorder A with the finder do
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 the enrosistrour X l. c) - A connection circuit B with the chorus of the connection circuit X 2. f) - 19 a connection circuit Dt with its finder? 1 4t.



  The connection circuit 3t is assigned exclusively to a hundred, it is connected metallically to a call seeker X 1 specific to the hundred cOD3idér0o. g) - A call finder X 4. h) - A first selector E with its rotary switch X 3.
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  L onsenbl e '(10: 3 first selectors!;, IL 3, are found connected, to the t exs-o: 2bl dos recorders A, by the control wires C 1. i) - "From a' selector hundreds E with its rotary switch X 5.
 EMI7.6
 



  The set of 'hundreds selectors', X 5,, is found connected to the set of G1'1rc, 3i f-1t r'o ur .c, by the son (do against! O C: 2. J ) - A line selector or connector F with its rotary switch X 6. All the connectors
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 their. is connected to the onsembrc will say recorders A, by the control wires 3 'C4 $ X 6. the) ... From the line equipment of the subscriber requested
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 R '.' '

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 EMI8.1
 1) - You post asked Put.



  Llinstallattan figured is four digits. For five digits, there would be one more selector, similar to the 'E X 5 selector. For six digits, deuJ; selectors in. more, etc. For three digits, there would be no mile selector. For two digits,
 EMI8.2
 there would not have been a mile selector or a hundreds selector.



   The operation of the system is broadly as follows: The calling subscriber picks up his set; his relay
 EMI8.3
 When excited, the start relays are activated, these close the starter circuit, and the traffic distributor searches for a free recorder. The recorder in turn searches for a circuit (the :; 'free connection, then, by means of the finder of the connection circuit, a free call seeker on the bank of which the calling subscriber is located;

   the recorder directs the researcher to the lisne in appeal. The maid perceives the numbering signal sent by the recorder. He dials the number of.
 EMI8.4
 the called subscriber, which teeth 1-n these in the diagram in figure 1, is given four digits. The first digit is received in the logger by the digital mile element.
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  L = first -; 51ez.oeui is oriented through * control wires 'on the level corresponding to the psitif'n of the digital element of.' :) miles, -then look for a selector of hundreds free in the considered 'group'. The second
 EMI8.6
 digit is received d :, 113 'the recorder cr the numeric element these hundreds, "The hundreds selector is oriented like the first selector. The three and fourth digits are received on the tens numeric elements 'and units and orient the connector on the requested line.



    The recorder then becomes free, the called subscriber is rung.
 EMI8.7
 



  By its response, the transmission '.'ont is achieved and the C "iflrn.'lni C'3t: Or: is éJ':; 7blie.



  In this system, a free li ::, ne is indicated by a positive polarity on the corresponding test contact.
 EMI8.8
 before. A line is classified as busy if the test contact is not L '. the positive pelarity of the battery.



   In the detailed description below, the letter R proceeding the number of a contact spring of
 EMI8.9
 râlais, indicates the contact made by the spring when the relay is at rest (not energized), and the letter T, the contact made by this spring when the relay is on.
 EMI8.10
 



  SUT) !, cSrn, 3, for example, that it siajiqse 9ur a determined subscriber to reach another subscriber having the number, b1J a? . When the calling subscriber P (figure 3), picks up

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 his position, this maneuver causes a loop at points 1 and 2. This loop has the effect of closing the circuit ,,. of
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 energization of the call relay. "The relay i closes the circuit of the starting relay Il following the connections: - earth, R, F; ,, T., RF, winding of Ittl and battery . Relay M1 activates the distributor.
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 traffic ;, by follows 3 of the connections: T u4 12 ', R T 1, point 3, (figure 3) Il 31, lower winding of relay 4,, and battery.



   Relay 4 closes its holding circuit at T 41 ,. in series with the lower winding of relay 3. The latter short-circuited by the starting earth coming
 EMI9.3
 in R 31 of T M 12, only works quine- the removal of this earth. This earth is removed when the relay T is energized (figure 2), by the opening of the rest contact R T1.

   The starting earth only short-circuits relay 3 (figure 3) during the pulling of relay T, which is delayed.The entry into action of relay M1 has the effect of
 EMI9.4
 prepare a test circuit on the call seekers having access to the group of which the calling subscriber belongs If the relay M2 is in operation, the test circuit is prepared only in the connection circuits specific to the group in question. The circuit of relay M2 is shown in figure 6.

   When relay M1 is operating, an error is made on the connection circuits, which are particularly affected by the. group to which the calling subscriber belongs., If these are free, relay M2 comes into action following the connections:
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 - earth, T 1.l'Ll, resistance, n 33, resistance, T M13, winding of .¯.:? and battery.



   If the connection groups particular to the group are busy, either because they are already connected to a recorder or because they are already in use
 EMI9.6
 for a cownunication in progress or in preparation, the T.:I2 relay cannot come into action. in the first case, a battery connected to point M prevents the operation of relay M2 which is bypassed. In the other case, the excitation circuit is open at R 33.
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  The land of T Miel, R L.i2l ,. (see figure 2) is put by Ra 2; 5 on the researcher's bench of the connection circuit explored by the brush T. is also put, by Rc 26, on the relay Me 2.



   The Me 2 relay is common: -? all call seekers in the same group. He prepares the operating circuit
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 operation of the Me 1 relay. The Lic 1 relay is common to - all the connection circuits explored by the recorders.

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  It is recalled that a connection circuit can
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 be multiple on the banks of a certain number of recorders, or even all the recorders and be taken by any one: these recorders.



   The pin M of all the connection circuits, having access by their researchers to the call seekers of the group where a subscriber is in call, is brought to the positive polarity (free line) as a result of the connections:
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 - earth, ^: I¯c2, resistance, R 33, pin M on the recorder bank.



   The relays 3 and 4 of the traffic distributor (figure 3) are at work, as it was indicated more
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 1? A.-l = j, The switch I? L is turned on pal 'following the connections: - earth, T 34, R 81,. RT switch, winding
 EMI10.4
 by RT, batter19.



   If a second call takes place, the earth pulse sent on wire 3, by T 31, activates the relays
 EMI10.5
 5 to 6>
The rotation of the RT switch is stopped when the relay 3 comes into action, it cuts the rotation circuit
 EMI10.6
 in il 81. Relay 8- has its excitation circuit closed by s-it; connections: - earth, T -Io 12 (figure 2), point 5 (figure 4), point f, .switch a (figure 3), established during the passage of the rubbers on a position correspond to a recorder requested by the call in progress, winding of relay 2, 1 5fl,, u T 5, wiper b, point r (flower 4), the rest positions of digital elements Xl,; 3, X3, X4, X5, 1 'eni? o .-1l.e: #emt du rcl ,, i, s 7 and the battery.



   Relay 8 of the traffic distributor (figure 3) is energized, in series with relay 7 of the recorder.
 EMI10.7
 encounter (figure 4). Contact n 81 (figure 3) cures the relation circuit. Contact T 8? puts an earth, either on relays 3 and 4, or on relays 5 and 5. Relays 4 or 6 drop out, the second winding of relE.is 4 and 6 being in opposition to the holding winding.



  When relay 8 drops out, short-circuited by T contact 72 due to recorder relay 7 (figure 4), relays 3 or 5 also drop out.



   There can be as many pending calls as there are relays mounted such as relays 3 and 4 or 5 and 5.
 EMI10.8
 



  The rotary switch RT each time relay 8 drops back on again if there is an earth at R 81.

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   If after a certain time, relay 7 being energized, relays 3 or 5 do not actually come into action, relay 1 is energized when a periodic cam passes, as a result of the connections: - earth, point 8, T 72, winding of relay 1, and battery, and relay 1 is kept on because of the continuity of the circuit;
 EMI11.1
 - earth, T 71, H 56, R 35, T 12, lower winding of relay 1 and-battery After a determined ';', i1: '18, an earth polarity appears on point 0, Relay S then comes into operation by the following :: connections: - earth, point 9, T 11, winding of 2 and battery.



   By contact T 21, an earth is put on point 3, causing the attraction of relay 4, then of relay 3 after passing the cam and due to the
 EMI11.2
 -l relay drop. The ET switch automatically rotates in search of a recorder, as described above.



   He. as many traffic distributors as required by the number of simultaneous searches to be carried out per call are placed in point 3.



   The recorder (figure 4) is in the position corresponding to the working state for relay 7. As a result of contact T 72, relay 7 is kept independent.
 EMI11.3
 awxument of the traffic distributor which provoked its excitation, the connections are due: - earth., T IIc 12 (figure 2), point 5 (figure 4),
 EMI11.4
 T 2, positioru; of rest of digital elements Xl - 212 X3 - X4, winding of relay 7 and battery.



  As long as the Pdle 1 relay (figure w) is working, that is to say as long as there is a call requesting a connection circuit located on the recorder bench, relay 7 is energized ( figure 4).



   Coming into action, relay 7 'causes excitation of relay 13 as a result of the connections:
 EMI11.5
 - earth, T 'i6., stud d o of Oombincur X5, lower winding of 13 and battery.
 EMI11.6
 



  Rotary switch E automatically rotates to find a connection circuit with pin M at positive polarity. Its ci> rc, Jî b of rotation is closed as a result of the following connections:

  <Desc / Clms Page number 12>

 
 EMI12.1
 - battery, T 75, R 10 = 1, T 134, pin a, position n of .5, T 71, R PI, breaker of E, winding of E and
 EMI12.2
 drums.
 EMI12.3
 



  The rotation circuit of the switch E is cut at i, when the stop circuit closes, when the trotter M passes over a pad corresponding to a control circuit.
 EMI12.4
 nexion, having access to the group in call: Le'relais 14 is
 EMI12.5
 excites as a result of oonnc.:io1:s: - (figure 2, terrj T 1.i; 22; resistance, i 53, ', 1.: ... r trotter -1 (figure 4), 1 74, R 91, R 111, plot C, position 8 Ii ::::; 5;; n = ioL1leiniant do 14 and battery.



  Contact 3 141 breaks the continuity of the rotation circuit of Cflm ,,, u.l;, motor rare following contact T 141) relay 14 connects the upper winding of relay 13 to the battery. The other end of its winding is connected to the wire there. On: '81aL; 15 thus has its two windings' traversed by csurant.



  C ':-)! 1W these one hundred windings ,, ::. Ont0s in differential, relay 13 drops if the flux from the upper winding is sufficient, this condition is fulfilled when Hun, another relay 13 is not connected to the same 'point M.



  The taking of a free orc; ons is characterized by the recs of relay L5 and the work of relay 14. Bans 1 #.> R, 0S on the contrary, redo 14 falls, these relays 14 being studied in such a way that two relsis 14 cannot be excited simultaneously, because they are mutually shunted by 1 winding of the 1: 3 relay. The entry into action of relay 14 8 and the fall of relay 15 cause the attraction of relay 16, which establishes contact. T 163: Far continuation of this contact T 153, the pad e being on the ppsiticn o of 5; the R 92 contact, the
 EMI12.6
 excitation of relays 3 and 9 is fired on their coils -
 EMI12.7
 lower elements mounted in series. Relay 9 delayed at
 EMI12.8
 the attraction has not yet attracted its frame while
 EMI12.9
 the reJa1s to a <iéj ";. established his contacts.

   By contact T 8?., The upper windings of 1'810 is 3 and 9 are closed (by T '74; on point 1.1. Relay 8 is maintained
 EMI12.10
 by its upper winding..Relay 9; whose in; ^ or--
 EMI12.11
 The elements are mounted nn a differential cannot be activated, but due to contact T 82, relays 3 and 9
 EMI12.12
 are branched off from the assembly formed by the
 EMI12.13
 relay 15 and i zà. Relay 14 is bypassed, relay 13 operates again, cutting the circuit of relay 16 which drops. The earth made by contact T 165 on the windings of relays 8 and 9 is cut, relay 9 attracts sound. frame.

   Relays 8 and 9 remain in position
 EMI12.14
 working as a result of the connections:
 EMI12.15
 - upper winding of 8 and 9, T 82, T 74, wiper M, piot?; i (fī1ii <e 2), R 56) resistance T Me 22
 EMI12.16
 and earth ...

  <Desc / Clms Page number 13>

 



   The connection circuit finder rotation circuit is then closed as a result of the connections: - (figure 4) battery, T 75, rest 141 ,. T 134, plot a, position o of X5, T 71, T '93 ,. R 101 ', slider R1, stud RI, (figure.' '2), breaker of Rc 1, winding of Re 1 and earth,
The rotary switch Rc 1, goes in search of a free call seeker, having access to the group in call, when the slider T passes, to a free call seeker, characterized by positive polarity on pin T.



   Relay 14 of the recorder is energized as a result of the connections (figure 4):
The battery, winding of relay 14, pin c, position o of X5, R 111, T 91 ,, T 73, contactor Tl of the researcher of the recorder, pin T1, (figure 2), trotter T of the researcher of the connection circuit, bànc pin, Rc 23, resistance, RM 21, TM 11 and earth.



   (It has been assumed in this description that this is a connecting circuit which is not specifically assigned to the calling group.)
The recorder relay (figure 4) comes into action, cuts off the searcher rotation circuit from the connection circuit by a circuit already described. Relay 13 tests the line through its upper winding and falls;. The .relay 16 comes to work as a result of the connections: ..- battery, resistance, R 131, T 142, winding of 16 and battery., And closes it. circuit for attracting relay 10 due to the connections: - earth, T 163, pad e, position 0 of X5, T 92, R 113, lower windings of 11 and 10.



   Relays 10 and 11 operate identically to relays 8 and 9. Relays 13 and 14 are shunted by the windings of relays 10 and 11, relay 13 is energized again and cuts off the attraction circuit of relay 16 which drops out. Relay 11 comes into action via its upper winding, contact T 163 cutting off the -terre- on its lower winding.



     Relay 6 comes into operation, as a result of the connections: - battery, the two series windings of relay 6, T 103, wiper, recorder searcher IC

  <Desc / Clms Page number 14>

 
 EMI14.1
 j? let c1, (figure 2), f; rtt6ur Cl d.u researcher of the .connection circuit, pict of b8Jl C, ne 2> é :, winding of J2
 EMI14.2
 and earth.
 EMI14.3
 



  The DC relay cannot come into action, the resistance of the two windings of the relata .H being too high to allow its operation. Relay 6 calls the recorder fcrue the circuit! ' rotation of call seeker C2, as a result of the connections: - (figure ': j, battery e T 7' "R 141, T 133.i ;, plot a, Dos it ion c of X5, f'1, 1 +5, 5l 11, T 65, 'trotter isle of the recorder seeker, plot Bi of the bench (figure 2)., 31', trotter J o'c plot of the seeker's bench of the connection circuit, 11: 1 2, breaker, TIC 2 winding and earth.



  Call seeker 1] C 2 enters rot> .ti, Jn.: T C W t 1 '1 ^. 1 search 4L * the calling line, this line is characterized by a so-called Hc118rrêtl1 polarity on the call seeker bench pad. The record 11 of the registrar enters: .úcrs in operation as a result of
 EMI14.4
 connections:
 EMI14.5
 r7nnexio; a # -: "n ±> t'J: i # E.e, = ni <Dule <µe; 1 "5. ù.oJ i? elais. 1.E, #plot. #> n. battery, 8nr ') ule', ient of relay 1-1, pin C? n; 'r;.; , ī.i; j, zr n; 1, a X, T 112, T gas ,, brush A of the searcher of ¯.¯ ..: 1 '^ ¯L:>' s. Lr, plot Qi (figure 2), R 51, brushes A of the circuit researcher ("J COn'i (.¯ï.it: p, '1w 21,' brush T 8t plot of Crtf7'a'tlnV .: ';",: u = '. T ¯: ":. 3, or: .r) Ule]' leJ1ts inj-ërieurs àez 'relais, ^ -> A et 1!', T At, 1 ',, 1 and earth ..
 EMI14.6
 
 EMI14.7
 



  The call pager rotation circuit is ccupù v- "'! C.';", ("Of contact R"., ' <, l '(figure 4), Aj''rës 1 ntest of 3-1; ¯ne, relay 1.) returns, closing the attraction circuit .ù., i relay 15..The circuit of - relay 1 of 1 '* nime- istr8UJ: erjt .-'. when: {'(;.:' - ;, Lé: Î (lr series of connections: - earth, T 16I, pad in position od¯e. 5 , T 92 ', T 1: 3, T PI,: r: rc'u7¯r. slow lower te 1 and battery.



  The input on action of relay 1 provokes; .ue, 11 attracting relay 3 as a result of the connections: earth, lower winding of 3, T 11, resistor wound on; # r <# 1 # .5Ls -3 and battery.



  Relay 5 itself ferns its hold circuit by eiuite contents']) 31 and T 32. It determines the input into 8Gicn of connection relay 5, to the recorder of the calling line. BaT csntacts T 53 'and T 52', relay 5 maintains the occupation elected connection circuit on the 'float M and the baby walker 1. The battery is put on 1 wire Il for the G': r'o.i ) '1'Giel1 of the connection relays. The contact T 56 ccurt-circuits the rtuleme, nt. upper relay 6.



  The relay C2 '(f'ij> ure 2) of the call searcher in series with the relay "6 comes on, ..

  <Desc / Clms Page number 15>

 



  , The C2 relay through its working contacts, establishes
 EMI15.1
 a connection of the dr.andeur station on 1-tenreglotreur, as a result of the connections: - (fi [9lre 4) battery, 'winding below relay 1 ,, T 58, trotter Al of .. 1Ionr83i3t seeker: . "eUr, plot., 1-, (figure '2)',, i? 31,, z. wiper and connection circuit seeker bench, TC 21, ur-rub: 1. and researcher bench. cheùr dta, .pe: l, line and extension of the subscriber dei'1andeur "bench and slider B of the call seeker, TC 22, bench and slider A
 EMI15.2
 of the connection circuit finder, R z l ', pin i3', LV wiper, (figure = ï), I '55', upper winding of 1, T 12 and earth.



    .



   In the case of an affected connection circuit
 EMI15.3
 particularly a. a group of subscribers, the relay 6 of the recorder cannot come to work, because there is no earth on., the contactor C of the finder! enrngist relll "The excitation circuit of relay 1 then by:" "(figure 1.1,), earth, 11 61, -: nrouJ¯ei.lower slow of relay 1 and battery.



     , After the connection rolaîs have been put to work
 EMI15.4
 '5' of the recorder, switch 11.1 advances its trotters by one step: - earth; rest position of. ssctor 1, breaker and 'winding of).'.: - 1, and btLe-r. ie .. lTj "sioenal is sent to 1: 'subscriber of; 1andeur, indicating to him that p ï2 can use his cîzdra n to compasor the number of the requested subscriber, as a result of the connections:

   , - point 23 (figure -l)., plot .1 of sector e of 'X4, capacitor, T 58, wiper, Il du. researcher of the recorder., plot A1 (figure 2)., R 31., wiper A and researcher's bench. of the station connection circuit., not shown in the diagram, point 2, bench B and wiper B of the
 EMI15.5
 call seeker, TC 2,2, 9anc B and wiper B of the connection circuit searcher, En 31 ', bench and wiper Bl du. finder scope of the recorder (figure> t =), 1 55 ', top winding of 1 and grounded.



    'RECEPTION
The subscriber arms his dial to dial the first
 EMI15.6
 number of 1 "subscriber, requested, that is to say 4 in the case of the example chosen.



   During its return to rest, the dial 'makes four cuts (on the line, these cuts have the effect of making the recorder relays 1 and 2 beat (figure 4) mounted as a pulse corrector.

  <Desc / Clms Page number 16>

 
 EMI16.1
 



  The first opening causes the relay to reto! TibGr which, via contact T 12, cuts its holding earth. ' The circuit of the digital mile element X1 is closed as a result of the connections :. '
 EMI16.2
 - earth, R 12, il 21, 1 .5.3, pin 1 of sector a of X1 "fl1 1 ,. enroulertenL of XI and battery.



  The coi = ir; wi.iteui% Xl,. attracts its armature and cuts its breaker ,, eliminating the short-circuit t of r'e1218 2 which comes into action, right side of the winding 'of 2, T 51', pads of sector C in position 1, wire 1 , breaker, wire 1, pads of sector a in position 1, T 52, R 21, left side of the winding of
Relay A comes into action as a result of the connections:
 EMI16.3
 - Earth,.; 12, roll up of 2,. 5 58 ', resistance and battery.



  The ocntsct R 21 cuts the cGr attraction circuit [Ci1ut; c-: t;,:, Ul 'Xl, yes lets go of its frame and moves its trotters to position 1.



     When relay 2 comes into action, the contact
 EMI16.4
 132 qui fer'uo le cir:? V.t clféxci tition of relay 1, the latter cuts in TI 12 the dté circuit:; ciior of relBis 2 which drops. The cycle of receiving an impulse is completed and all the elements are ready again to receive 1 = s cuts: mi vdntGG ..:;: .. 1 :: funcr1.; IonnsTil, omt du eoi.i, uvctCllT 'is fully controlled, since relay 1 cannot input or. action only when the CO breaker: 'l: C, -lt': '1teur is open, 0'o3t-1-say when one has made sure of, ti' G: 1'a C'i '; ¯.OYI from the palette. The dial pulses are distorted by 1: corrector assembly (relays 1, 2, and c # rr.mt8tcmr), and adapted to :; operating conditions das Glé ': on ts digital.' ').



  .From the jJrcniÈir8 impulse, éolé chl "cte du r (Ù ,, 18 1, relay -1 is energized as a result of the connections: - battery, resistance, winding in (l1J, .d;> 'do 1., T 31, R 11 and earth.



  The .Jn relay is. o 'short-circuited each time relay 1 is attracted, but its delay (due to oc short-circuit)
 EMI16.5
 does not allow it to fall back into the space of, time Heparating two impulses.



  The omnutatcur X1 has its circuit closed as a result of the connections: - earth, T 51 ', .T .il, sector g, winding of
 EMI16.6
 .X1 ,. and battery, .. -

  <Desc / Clms Page number 17>

 and attracts its frame. Each time the dial is cut off, the digital miles element will advance one step, names it was described for the first cut. When the dial has returned to idle @, the digital element will have advanced four steps and will be stopped in position 4 of sector'a. Relay 4, short-circuited for a long time, drops out) thus indicating that the first digit has been transmitted. The circuit of X4 is cut on T 41, X4 lets go of its armature and passes its brushes to position 3, thus disconnecting Digital isolation from the miles and connecting the digital element from the hundreds X2 ,.

   The second digit is received on X2; in a manner identical to what has been described for the reception of the first digit; the same applies to the third and fourth digits which will be received by the elements of X3 and X4.



   'After sending the last digit, the digital elements of the recorder will be in the following positions:
Xl in position 4
X2 in position 3
X3 on position 8
X4 in 7 'position
After reception of the last digit, a tone is sent to the calling set indicating that the. selection is not finished and asking him to wait for the end of this selection. At the end of the selection, the subscriber resets; the return call signal, if the called subscriber is free; the busy signal - if its correspondent is busy.



    SELECTION OF THE IAND SUBSCRIBER- A) - -Selection,. '. First selector, selector ordered.



   As soon as 10 'input distributor X4 has reached position 2, that is to say as soon as the first digit has been received, the commanded primary selection can begin. The combiner X5, which had remained in the rest position until then, switches to position 1 as a result of the ci = fired - earth, pad 'of sector e of X4 in position 3, R 232, pad h of X5 in rest position, breaker, X5 winding and battery.



     The X5 combiner comes to position 1.



   In this position of the combiner, the rotation circuit of the first selector closes as follows: - battery, T 57 ', R 151, pin b of' X5 in position 1, friction switch R2 of the recorder finder, pin R2, breaker and winding of RS 1 and earth.

  <Desc / Clms Page number 18>

 



   The selector RS 1 enters automatic rotation until its wiper C meets the first stud
 EMI18.1
 of the packet of li.ünes corrG3ondl1t su thousand 4 and connected orally to pad 4 of the wiper a of the digital element of miles.

   In this position, the rotation circuit is cut at R 151 by the attraction of relay 15, the circuit of which is closed by the secondary circuit (figure 6) of the
 EMI18.2
 transformer f1 J 1, rectifier Fi) 1, in the direction of the current, painted 23 (figure 1;., T 5G ', R 121, wiper C2 of the recorder researcher, pin 02 (figure 2), brushes C of the first selector, pad of bank C and wire of centu3.e, bundle of wire 1 (figure. ± j, bank a of COl'l; 11ltateur Xl in position- (the number received is, let us recall it. a 4) wire 1 corresponding to j31.Jt µ, in position 1 of combiner J5 R 251, R 131, the two series windings of rela is 15, rectifier RD 1 in the current direction, T 55, point 2, ( fieure 5) rectifier RD 1 in current direction, dry <code of transformer TF 1.



     By curing contact T 151, relay 15 prepares the closure of the free rotation circuit of the first selector. Contact T 152 closing the excitation circuit of relay 13, the latter comes into action.



   The end of the commanded selection is thus marked in the recorder by the following situation: relay 15 and
 EMI18.3
 1S at work, ocmbiner on position 1.



  B) - Free selection -
 EMI18.4
 1 ->; :: commanded selection being completed ,, the -;: ic.: -; free ccmmsnce. The '' brush rotation (lu '; r.e> .. i 1 st G6J8Cgl)!' r # '' nnd dors, we reason the cnnef: ions: - battery, T 57 ',' T 151, TI 1.2i, T 15 :, trotter RU of the researcher rL2 the recorder, plo R2 (figure 2), breaker , coil only RS 1 and earth.



  Lp contact T 155 places test relay 11 on wire T8 of the recorder connector, and from 1 :, on wire T of the re0ier selector.



  At the moment of passing on a free li, é; n 8 ', relay 1.3 is energized. The first selector brushes stop in this position because the rotation circuit of the first selector is cut off at R il. The armature reads the relay li, placo the upper winding of relay 15 (winding at f <; i'h2.r resistance; bypass on the coil of relay 1. The ..o.tentia% of the test pin therefore drops to a value close to that of the negative jôl.e of the battery. The selector is thus protected against any possible tap by another first selector.

   Relay 15, which is a differential relay, drops out because the fluxes produced by its two windings balance each other out exactly.

  <Desc / Clms Page number 19>

 



    C) - Connection to the hundreds selector -
The end of free selection is. marked by the following position of relays 15 - 14 - 13: relay 14 and 15 on, relay 13 on rest: As soon as this is the case, relay 16 of the recorder is switched off by: 'battery, resistance , rest 131, T 142, winding of relay 16 and battery:
Relay 16 can only come into action 'if the following condition is fulfilled': the second 'digit sent and distributor X4 in position' 3, because relay 16 is short-circuited by all the links': - Earth; plot e 2, R 232, plot f in position 1 of the combiner X5, R 234 'and relay 16, if the second digit is not yet recorded.



   Contact T.163 forms the circuit of 'relay 12 which is thus constituted: - earth, T 163', pad e in position 1 of combiner X1, R 125; relay winding 12.



   The relay 12 is maintained by its working contact T 123 and the holding circuit is the following T 123, R 251i, T SI !, and earth.



   In R 121, the attraction circuit of relay 15 is open. Relay 15 by falling causes the relays 13 to fall and which have their circuits open at T 153 and 1 153. Relay 16 drops back, opening at T 163 the circuit of the electro of combiner X5, which switches its wipers to position 2. In T 132, the occupancy polarity is set on the test wire T2 to signal that the hundreds selector which was tested by the first selector is occupied.



  SELECTION OF HUNDREDS - A) - Ordered selection -
When the inlet distributor X4 has reached position 3 and the combiner X5 has reached position 2; the selection of hundreds can begin, since on the one hand the second digit has been received and recorded on the digital hundreds element X2 and, on the other hand, the first selector is connected to a free hundreds selector.



   The hundreds selector rotation circuit is then closed as follows:

  <Desc / Clms Page number 20>

 -   drums; 1 57, R 151, stud b in position
 EMI20.1
 of (5; R 17.1, R 255 ', trotter B2 of the researcher of the recorder, plot B2 (figure 2), friction D and bank of the first selector, I 22, breaker and winding of iS2, earth.



  The selector R8 2 enters into automatic rotation until its fr.-àtteur C is in contact with the first piet of the bundle of lines corresponding to the hundred 3 of the '
 EMI20.2
 thousand 4 and also connected to stud 3, wiper has d.e 1 t. digital hundreds element X2.



   In this position, the rotation circuit of RS 2 is cut in R 151 as a result of the attraction of the relay 15, the excitation circuit of which is closed retort follows: (figure 6) secondary of transformer TF 1, rectifier
 EMI20.3
 D 1 or HD 2 in the direction of the current, point 2J (f1, ::; u1; e 4), 1 55 ', T 121, R 25.S', brushes S 2 of the recorder finder, stud 5 2, trotter and bench S of the first selector; î.1 52: 'resistance and lower winding of S 2 in dÓri- 7a - ..; ion, bolais C and bank of the selector of hundreds, control wire 5 of package 11 (figure e 4), pin 5 of the selector of the co: ':, bineut': mÍr, i8rique of hundreds i2, wire 2, pad G in I08i- tion of the combiner: C5;

   , R 251, R 181, the-two windings on relay 15 series, rectifier 1 in the direction of the front 1 55, poi, lt 2-, figure 5, rectifier i0 5 or D 4, seccndeire of transformer T3 '1.



    Through its contact 1 151, relay 15 prepares the
 EMI20.4
 closing of the free rotation circuit of selector 1-8G Hundreds turn:? Jr lc CO'l1'i:; '; ('. t 1 "J2, the circuit of relay 13 is over ;? e '. this relay comes to txrw he.



   The end of the command selection of the hundreds selector is thus marked in the recorder by the
 EMI20.5
 , Ütun \; iOl1, :: ūv.lnP :, relay 15 and lJ5 working, combiner X5 in position 3.



  B) - Free selection of the hundreds selector -
The commanded selection of the hundreds selector
 EMI20.6
 () tS :: 1t tGrilÜD08, the coninence free selection. Rotation dC>: 3 brushes of the CWli selector. '. iil :: 5 then resumes due to the connections: - battery, 1 57 ', T 7¯57¯, i; 1.il, 1134i plot a, position 2 of the combiner? [5, 11 17.:;:, Ai 233 r, contactor B2 of the recorder finder, plot B2 (figure 2), trotter
 EMI20.7
 and bank of the first selector> OE li = 1, breaker and winding of RS2 and earth.



   The test relay 14 is placed by the contacts
 EMI20.8
 1 153 and # 124 on thread \ 2 of the ITonreistr8ur researcher '

  <Desc / Clms Page number 21>

 
 EMI21.1
 and, from li?, 'fi8'U'rc 3) on wiper A and the first dru bench s01eqtsur: m 21, wiper T of the hundred selector. l Au 'pès's: "[' :, ': 1" on a free line, relay 1-i is # :: èité ..' The brushes' of the do hundreds selector stop on this ;, position, because the circuit, selector rotation,
 EMI21.2
 cen'a.ncs is cut in R '141.



  '' The frame 141 of relay 14 places the upper winding due r (-lays 13. (low resistance winding) in the safe derri'vüt.ion were winding it from relay 14. The potential of the test pin drops therefore to a value close to the negative pole of the battery. The connector is thus protected against any possible seizure by another central selector -
 EMI21.3
 ta1nGs,. ' ,,
Relay 13, which is a differential relay, drops out, because the flows produced by its soft windings balance each other out.
 EMI21.4
 exactly.



  0) - Case of simultaneous meetings -
If two selectors of hundreds meet in
 EMI21.5
 lead time the same free line, both mock a time out on cotte li, 3ne, one of the selectors rosto engaged, the other continues. its, research.



   At the moment of 'the meeting, the two relays 14 of each recorder (figure 4)' coming into action. Each of them cuts the circuit of the rotation of the selector with which
 EMI21.6
 he was mOilloJ1téJnér ::!. "mt associated ùt shunte on T 141 its unrolling by}, 'f (; l1ro \ .: l;); superior lcnt (low resistance winding) -du niais z which CO: C'l'o.sponrl. '1': 1.:. Is the two relays 14 and with them, the upper windings of the relays 13 are powered in parallel by the earth at trav.::rs
 EMI21.7
 A common resistoncr Z, put by the connector on its test wire (figure 2).



   Under these conditions, relays 13 cannot
 EMI21.8
 operate as a relay of differentials and they remain attracted to all soft. As for the relays 14, if they were able to attract all nails their armature, they could not maintain
 EMI21.9
 hold when, their onroulomcnts being bypassed by relays 13, the resistance of which is low, Finally, the soft relays' 14 drop and we re-establish the circuit of rotation of the tale selectors to which they are,): 1t associated .

   COTnY1l1J practiced soft rolling 14 no. Which can have an absolutely identical go.setting, one 'so dcs two relays 14 drop out,' the other remaining on., Taken '(the first relay 14 which
 EMI21.10
 opens his T 1 - he stops having "an action on the other) .. - Connection of the hundreds selector -
The end of the free selection is 'marked in 1'

  <Desc / Clms Page number 22>

 
 EMI22.1
 recorder by the following position of relays 15 - 14 - 15; relay 14 and 15 working, relay 13 idle ...



  Relay 1.6 comes into action as a result of
 EMI22.2
 connections:
 EMI22.3
 battery, resistor, R 131., T 143, 1G winding and battery.



  (It should be noted that the rnisis 16 can only enter an action if the digit of the dizeines is already ifleq. I; CI 8st ':'. \ .. say: 1 (F2lt "e le (1";, i ., input rib X4 has left) position 5.



  In this) "position, the r, 'lai8 16 is short-circuited by
 EMI22.4
 following links;
 EMI22.5
 earth, trotter pad in position 5 of X4 :, pad i'2 of combiner in X5; R 254 '; winding of 1'31a i8 16 and ter1: 'C') D3 1UG the relays 15, lù, 13, 1G occupy this position, the connection of the hundreds selector is made. Relay L2 of the hundreds selector switch 2) to ACE, ion. in series; ... irec the stop relay 15 (figure 4) whose upper winding of great resistance is .-; ourt..c: LC: l ::. tG in t 168.



  F & r earth, T 135, plot e 2 of the cC,; -: 1.bin:, mr X5; winding of the coir-autator and battery, X5 has sai: circuit d:; r, tract.ion closed and its pallet is
 EMI22.6
 attracted.
 EMI22.7
 



  The relay 82 coming to work, frJ: 1G in TS 25 a maintenance circuit by its winding? Aj>: li? 5e1 = r the bench and trotter T of the first 8elect the b2nc and the friction 12 of the recorder finder ( fi.¯; ur9 4), 1? .21à. resistance and beat 3 ',.



  In tus 21, T3 3, and 18 .J. 1? ; threads of lisnes and z t r> j¯ s 1 EIP.e thread. 32nt extended to ^ .Oi11.18 (; i% f; l7'¯ '"in RS 21. the +, circuit of the stop C'.l.ßS 15 of the recorder is,.' V, r: "-; ri.:. 3 es '' extended or¯ 7 1? .. ± '' :: \: \:" J. {C,) n¯l G cJ-; e11r "i.'r -1G; J8, O lu c.:.z,ùDi.n=;:1: X5 in position 5 (selection of iz {3 ine S fi - Relay 15 of the recorder (figure 4), having sen circuit dat tra ctic..1 ourer in. US 24 (figure 2) fell back.



  12 1 53, il OU'1 ::: 3 le, circuit of relays 13 and 14 which ifle torobont, causing the cellm ^ of 1'010i8 1G.



  1'0 eleccro lu circuit co'b'n'j is open in T 163. Ln combiner X5 brings>,.: Sb ^ 1: is = :: 1 1 [1 pocition 3,

  <Desc / Clms Page number 23>

 SELECTION OF TENS - When the inlet valve has left position 3 and opens the combiner X5. has reached position 3, the selection
 EMI23.1
 tion of the tens can begin since on the one hand, the tens digit has been received. and recorded on the digital tens element X3, and on the other hand, the de.centaines selector is connected to a free connector;

   
The connector rotation circuit is then closed as follows?
 EMI23.2
 "battery, T 57, R 151, plotbàn position 3 of the cor- bineur X5, R 174, R 233", wiper B2 of the researcher of the recorder, - 'lj- B2 figure 2), wiper and bench B of the first selector, breaker, RCO winding and earth,
The connector's electro begins to rotate automatically in search of the control pin designated by the baby walker a in position 8 of X3 (figure 4).
 EMI23.3
 the connector electrc rotation cirouiu is cut as soon as the control brush C of connector A reaches the control pin Relay 15 then operates because of the circuit: secondary of transformer TF 1 (figure 6 ' )., re-
 EMI23.4
 RDI trainers or `` RD3 in the direction of the current:

   point 23, (figure 4), T 56 ', T 121, .R 234' wiper S 2 of the recorder finder, plot S 2 (figure 2), wiper and banks of the first selector ', TS24 , wiper and banks of the selector
 EMI23.5
 hundreds, RC 04, resistor-. and winding of relay "C50; in par.allele, rectifier in the direction of the current, trotter and bene c of the connector, wire 8 of package 13, (figure 4), bank a of X3 in position 8, wire 3, pin G of combiner X5 in posi-
 EMI23.6
 tion 3, R 251, R 181; the two serial windings of rail 15 the rectifier RD 1 in the direction of the current, T 55, point 24 (figure 5) rectifier RD3 or RD4 in the direction of the current, secondary of the transformer.



   In R 151, the connector rotation electro circuit is cut. the end of the ten selection is marked in the recorder by the action of relay 15.



  - Switching of the combiner X5 to position 4 (unit selection)
In T 152, relay 15 prepares the switchover of combiner X5 to unit selection position 4. The transit circuit. is completed when the fourth digit or unit digit is received, and recorded by the unit digital element X4. In
 EMI23.7
 This assumption, the slider T of X4 is engaged and the relay 4 is released.
 EMI23.8
 is The co, mbineur goes to position 4 by: earth, T 152, plot. d of X5 in position F- R 42 sector i of X4 in position 7 ,. breaker, X5 winding and battery.



   Combiner X5 brings its sliders to position 4

  <Desc / Clms Page number 24>

 - Unit selection - -when sector J of X4 is engaged and relay 4 is at rest, and combiner X5 is in position 4, unit selection can begin since, on the one hand, the digit unit has been received and recorded on the digital element X4, and that on the other hand, the brushes of the connector are oriented on the ten to which the requested subscriber belongs.



   The connector enters again in automatic rotation in search of the control pin designated by the friction h of the digital unit element X4 'in pcsition 7. The electro rotation circuit of the connector is cut as soon as the connector frctor c reaches the control pin.

   The stop relay 15 then operates as a result of the connections: transformer secondary, TF 1, (figure 5) rectifier RN1 or RD 2 in the current direction, point @@ (figure 4), T 561, T 121, R 234 'wiper S2 of the searcher of the recorder, pad S 2 (FIG. 2) wiper and bench S of the first selector, TS24, trotter and bank S of the hundreds selector, RC 04 wiper and pin of the bank ,, o of the connector; wire 7 from package 14, pcint 14 (figure 4), wiper h of X4 in pcsition 7, wire 4, pin g of combiner X5 in pcsition 4, R 251, R 181, the two windings in series of relay 15, rectifier RD 1 in direction of current, T 55, point 24 (figure 5), rectifier RD 3 or DR 4 in direction of current, secondary to transformer.



   In R 151, relay 15 cuts off the connector rotation circuit. relay 13 then comes into action as a result of the links? earth, T 152, terminal a of combiner X5 on position 4, lower winding of 13 and battery.



   The end of the unit selection is thus marked in the recorder by the working position of relays 15 and 13.



  The requested lighe test -
When these soft relays are in this position, the test of the requested line is carried out by the relay assembly 14, relay 13, consequently back connections; battery, winding of relay 14, T 153, pad C of combiner Xb in position 4, T 124, wiper A2 of recorder finder, pin A2 (figure 2), wiper and bank .1 \ 2 of the first selector, TS21 wiper and bank a of the hundreds selector, RG 01 connector test wiper, series winding of relays A and F, RF3 and earth.

  <Desc / Clms Page number 25>

 



   Two cases are then to be considered depending on whether the requested line is free or busy.



  A - The requested line is free -
Relay 14 is working. In T 141, the relay
14 places the upper winding of relay 13 (low resistance winding) in shunt on the winding of relay 14. The: potential of pin debts! therefore falls to a value close to that of the negative peel
 EMI25.1
 , drums.

   The requested line is thus protected, against any possible catch by another connector, The relay 13 which is a differential relay, drops out, because the flows produced by aes two windings are exactly balanced,
Relay 16 comes to, work by: battery, .resistance, R 131, T 142, relay 16 CONNECTOR CONNECTOR
The end of the test of the requested line is marked in the recorder by the following position of relays 13,14,15. And '16': relays 14,15, and 16 are working, relay 13-is at rest .

   As soon as these relays occupy.
 EMI25.2
 these positions: the connection of the conn;} ctèur is eff; ctuéq The DC relay figure 2) of the connector comes to work in series with the relay 15 (figure 4) - whose winding
 EMI25.3
 upper ', of great resistance, is bypassed by the contact T 162,
 EMI25.4
 The r = i1; is Cô '(figure 2) closes in TC 05 a do maint ion circuit by its (7nroul; rit-rit sl1.pér, i'3ur, the bank and slider T of the hundreds selector, TS 23, 1 bench (, t friction T of the "first selector, bench and slider T2, of the search engine of the recorder (figure 4), T 122, resistance to battery.



   In TC 03, the relays A and F of the called subscriber are connected to the test wire, in TC 01 and TC 02. The line is connected to the called subscriber.
 EMI25.5
 



  In RO Ground, l ,; Mnrugistre relay 15 circuit: ur is open.



   <The r <;. ijis 16 of the recorder (figure <.1 :), at the time of its entry we act,, has closed at T 16 ":., Pin e 4, the circuit of attraction of the electro of the coil X5 which attracted its armature.

  <Desc / Clms Page number 26>

 
 EMI26.1
 é'.SSg0 of co. inour X5 on position 5 and E
 EMI26.2
 Relay 15 (figure 4) drops because its circuit
 EMI26.3
 is open in RC 04 (figure 2). He cut in T 151 the c ir- cuit of rclë.: I3 14 and 13 qui 1 ,,; to: o (mt (, '1881, Jntrninant li' chute du r <: 1:> is 1 & which opens the cont and T 16- ,. The co; r- binvur would pass ss .t'.r.ottcurs to position 5, then cross this positi np; r SUit3 of the circuit: turrc, Tri 191, R 1G3, pad f 5, breaker, coil of 11 , ebctro and - ',,' tt0ri- L cew, ri = î.: er x5 accapa J.- position 6.



  I, position occupied p-:;: le en: hoe X5 m. ± 1.r0UO 1 :. end of actions rréliin0irs J.'ctrbliss :. nt d9 la oo ...; uniction (preselection, sel-ction, t (7St d line d, - "Yl8.! 1déEJ); in this position, ligD0 dc the requested subscriber, must. : shot: extended0 to -sort to 1 <s selection organs '' to 1, circuit already connected, which 0nvci, on elli, the COl1rnt of ppc-1.



  '# = 1 effect, the relay .5 of the connection circuit (figure 8) has its excitation circuit closed CO It follows: earth, Electrical,: upper part of relay 5,' rectifier in the direction of the current, ' bench E of the researcher of the reC:, istreur, trotter L (figure 4), R 36, stud b of the conbineur K5 n. 'position 6, R 814, R ..- 1, point 24 (figure 5) , rectifiers RD '> 3 or RD 2J, transformer secondary, rectifiers RDI or nid 2, point 23, (figure zut), T 56', R .'5, R 8I; 3, 'pad E of combiner X5 in position 6, R 198 and earth. '' Relay 5 of the connection circuit closes enet 54
 EMI26.4
 the circuit of relay 1 which is as follows:
 EMI26.5
 earth, 'R '55, T 3.1, top winding of 1 and bat-
 EMI26.6
 terie.



  Relay 1, when energized, closes the circuit of relay 4 at T 11, which is as follows:
 EMI26.7
 battery, resistance,; T 11, R .'3'5 ', winding of 4 and
 EMI26.8
 drums.
 EMI26.9
 



  In T 46, relay 4 closes its holding circuit, Zn T 41 and T 44, it prepares the connection of the requesting subscriber to supply relay 1.:, n T -, relay xi
 EMI26.10
 closes the relay 3 excitation circuit.
 EMI26.11
 battery, resistance, T 4J, winding of relay 3 and
 EMI26.12
 Earth.
 EMI26.13
 Relay 0 went into action. In T vu 'and T 36, it
 EMI26.14
 connects both the Seeker and Selectors test leads.
 EMI26.15
 on the battery connected by T 43. In T 51 and T 31 ', it

  <Desc / Clms Page number 27>

 connects the calling subscriber to supply relay 1.



   But in R 31 and R 31 ', it opens the circuit of relay 1 of the recorder (figure 4) which is released.



   The connection circuit passes under the control of relay 1, (FIG. 2) which is itself under the control of the calling subscriber. We will see later the sending of the 'inrush current on the requested line.



   B - The requested line is busy -
The potential of the test pin of the requested subscriber is close to that of the negative pole of the battery.



     . Recorder relay 14 (figure 4) does not work, but relay 17 operates because of the circuit: battery, winding of relay 17, rest 192, T 133, pad d of combiner X5 in position 4 - T 152 and Earth.



   It remains in the working position as a result of the connections: earth; 51 ', T 172, T 175, R 192, winding of relay 17 and battery.



  Switching of the combiner X5 to positions 5 and 6 - -Relay 17 closes the switching circuit of the combiner X5 at T 171, X5 following the connections :, earth, T 171, pad f 4, pad h 4 of the combiner X4 , .. 'X5 winding breaker and battery.



   , The combiner moves its wipers to position 5, then crosses this position as a result of -links :. earth, R 191, R 185, stud f and h, of combiner X5 in position 5, breaker, winding of X5 and battery.



   The X5 combiner occupies position 6. In this position, -the recorder relay 3 is short-circuited by all the connections: earth, T 171, pin a, position 6 of X5, winding of 3, st drops out .



   Relay 3 opens at T 32, the circuit of researcher connection relay 5, which drops out, cutting the circuit at T 51 '. the selector connection relay le, which also drops out ,. In T. 52 'and T 122, the support is cut on the test leads', 'seeker side and' selector side. The connection relays of the call finder and the hundred selector drop out. Relay A (the equipment of

  <Desc / Clms Page number 28>

 
 EMI28.1
 ..good (figure 4) drops out before 1 relay F.

   The latter then finds a circuit of 1lc: in-tien closes as follows: earth, R A3, painted 2, loop of station d6i.û ::. NeUI 'not shown in the diagram TF 1, R, é: 1, winding top of relay F, coil of relay comriun 0 c, t batt <3ric .. '
 EMI28.2
 
 EMI28.3
 Un8 occupation tomlité is snvoTêe on the,: bonné
 EMI28.4
 applicant by:
 EMI28.5
 point 16, capacitor T O1, a r # 1% is F lui, Indi-
 EMI28.6
 when the called subscriber is busy; Ultimately, all the organs contribute to the
 EMI28.7
 When the communication ends, the subscriber toe-, nndeur remains connected to relay F.



  ,, He hangs up the subscriber dG.!: O; -ndE-ur, relay F
 EMI28.8
 falls.
 EMI28.9
 



  1,1 bonné del1'J.ndé has several lines- D ", 3 ce c '8, the plot S of 1. :: pre, ièrv line, 7 is connected'. \ 1 -) anoint 15, the lines 8uivcnts are linked -.u
 EMI28.10
 point 16,
 EMI28.11
 Li; prcnlèr0 line was busy, it was t:; xplcn:. "." r, 1 s xt.ivi <; tcs. : u.rsue 1 cO ':' Qint; ur X5 reaches 1.¯. position'.



  5, relay 10 .9 its closed excitation circuit: secondary to tr: msform: .ttiur (figur, 5), r sdressers RD 1 or RD 2 '.ns the S ",' 1S of the current, point z5 (figui 4) T 56 ', T 121, R 23', float S2 of the recorder seeker, plot S2 (figure 2), ilo-ttaur 3 of the seltioteur, TS?, 4, wiper u sÓ1votuur du \, ; nt.: 1nE) s, RU C4 of the connector, rdr.; ss; ur in the direction of the current rubbed S and pad S até o. pr ",,; 'ièrL lignu d.'. ns 1, - bench back conn .... ct - :. urs, point 15 (figure 4), 1 plot '& du combinuur X5, n position 5, T I7., R I8I', \ Jnroul'vffīnt do Here, 1 r0dr 'Jss0u,: t "RD 3 in lu sns du ccurc, nt T 55, painted 24 (figure 5) rectifiers RD 3 and RD 4. In 1, direction' of the current, secondary of the tr-ns- fcraatur TF 1.
 EMI28.12
 



  The p.ss.:rw of the cr: hin.: Ur d 1 pasition 5 at the po-
 EMI28.13
 position 6 is cut in R 191,
 EMI28.14
 Lv shines 18 has its circuit f, -, rmci,: trru, T 51 ', T 172, T r93,: nrcul., Ifi;, n-t d 18 t b "tturiG.



  It attracts its ^ .r - :. tur¯ t fvrtü:.:. a circuit of n1: 1in- tion n T 182, L .: r, 1-is .Il '"' .y. '. nt its open circuit bn R 192, r, tQ'i1: J, -, .. n R 174, 1, .. conn. rotation circuit, ct ..ur Ist prepared.



  Li Triais 15 having sen open circuit cn R 181 Oü'-, to7 ra bt closed ..: by 1 ... contact R 151, 1 ..; cannon rotation db circuit: ct, ur:

  <Desc / Clms Page number 29>

 
Battery, T 57 ', R 151', T 195, T 183 ', R 174, R 233 "wiper B2 of the recorder finder, plot B2 (figure 2) trotter and bench B of the first selector, TS 22, wiper and bank B of the hundreds selector RC 02, failure, winding due to electro and earth.



   The connector brings its brushes to the next position to which the second line is connected.



   In this position of the connector, the wire 15 which was used to maintain the relay 19 of the recorder (figure 4) is cut.



   Relay 19 drops out, reestablishing the busy relay circuit; but in this new position, the excitation circuit of relay 15 is closed: secondary of transformer, TF1 (figure '5), rectifier RD 1 or RD 2 in the direction of the current, point 23 (figure 4) , T 56 ', T 121, R 234', scraper S2 of the recorder finder, pin S2, trotter and bench S of the first selector, TS 24, trotter S and bench of the selector of the hundreds, RC 04, rectifier in the direction of current, connector wiper, pads of sector S assigned to the following lines, point 16 (figure 4) (the wires connecting points 15 and 16 to the first lines of a direction or to the following lines, are common Firstly,

   to all first or subsequent lines of PBX subscribers and on the other hand to all recorders) T 181, series windings of relay 15, rectifier RD 1 in the current direction T 55, point 24 (figure 5) RD 3 or RD 4 rectifiers in current direction, secondary of transformer TF 1.



   Via contact T 152, the circuit of relay 13 is closed: T 152, pin d of combiner X5. In position 5, lower winding of relay 13 and battery. Relay 13 comes into action, the circuit of test relay 14 is closed on the subscriber's test wire: battery, winding of relay 14, T 153, T 182 ', T 124, wiper A2 of the researcher of the recorder, A2 plot (figure 2), wiper and bank A of the first selector,
TS 21, slider and bank A of the hundreds selector
RC 01, connector brushes T, relay windings
A and F in series, RF2 and earth.



  This second line is itself busy.



   The potential of the requested subscriber's test pin is close to the negative pela of the battery. Relay 14 of the recorder (figure 4) does not work, the connector electro rotation circuit is closed again: battery, T 57, T 151, R 141, T 134, T 183 ', R 174,
R 233 ', contactor B2 of the recorder finder, beam B and bank B of the first selector, TS 22, brushes B and bank B of the hundreds selector, RC 02, switch, coil of RC 0.



   The brushes of the connector are brought to the next line. As a continuation of the preceding circuits, the connector explores all the lines grouped under the same number up to the last of these lines: two cases must be considered depending on whether the last line is free or occupied.

  <Desc / Clms Page number 30>

 



  - The last line is free -
Relay 14 of the recorder comes into action due to the test circuit. ..In R 141, relay 14 cuts off the connector rotation circuit. In ', Il 141, the release
 EMI30.1
 14 pls the upper winding, from relay 13 (low-resistance winding) in bypass on. winding of relay 14 ..



   The potential of the test pin therefore drops. to a value close to that of the negative pole of the batches. The line requested is thus protected against any possible seizure by another connector,
 EMI30.2
 Relay 15, which is a differential relay, drops out because the fluxes produced by its two windings are exactly equal ..,
 EMI30.3
 Relay 16 comes into action for the following purposes:

   Battery, resit - .: nce, It 131, T 142, relay 16
The end of the test of the requested line is marked in the recorder by the following position of relays 1,14, 15 and 16: - relays 14,15 and 16 working, relay 15 at rest., As soon as these -relays occupy these positions, the connector connection is .'ffeetée, as indicated above.



  - The last line is busy -
 EMI30.4
 The çonne (, to-lr crosses the position of the last \ 1st bed "ne., The cirotit of relay 15 is open, wire 16, no longer being connected, Li wiper S of the eonneoteur. ' j, 'jn T 151, relay 15 cuts off the connector rotation circuit.
 EMI30.5
 In R 152 the circuit of the occupancy relay .7 is closed, 'thus 01103 the circuit of passage of the combination X5 on position 5:'. earth, R I2, T 183, pin f of cOi'b1l '!. 6Ur z5 in position 5, breaker, slow winding of X5 and battery.



   Relay 17 short-circuits relay 3 by ccntact T 171 and pin has on position 6 of X6.
 EMI30.6
 



  Relay 3 r2to, be, connecting the deraan- deur subscriber to relay F and releasing the devices in engagement and the recorder as seen previously.

  <Desc / Clms Page number 31>

 
 EMI31.1
 



  - Cied call the subscriber of :) :: iHad0 '(- We have seen above:, nan one the called set, ....,;' had been recognized lihrA, the recorder established the connection in the connection circuit. 'Nelcis 5-1-S-4 are ..AU work., The calling station is supplied by relay 1, the connection circuit is under the exclusive control of the calling party.
 EMI31.2
 The requested subscriber is called (relay 5 is working) following the inrush current connections resistance, T 55, T .52 ') wire B, trotter and bank B of ^: re: i9r selector TS .22) , trotter and bench B of sdect: l1 'of hundreds, T4 () 2,. wiper B and connector bench, painted ?, post zut ringing of post 'dw.anlê, wire A,' bench and wiper A of connector, 1 <.tic.

   CI, bench 'and. slider ,. selector: r of hundreds, TB 21, bank .et f ".ro..t- tor A of the first selector, T: 2, T 43.fi, T 51, lower winding of relay 6 and bët t: ; r iG,. A part of the call flow is de} ivé3: 'ver.3 the pcst-. of the subscriber of: iandeùr who thus initiates the call return, followed by the circuit: capacitor , T 41, T 3I? Slider a and seeker bench of the conti. Circuit ,, xi or ,, TC 21, trotter A and ban'c of the call seeker, point 1, ¯ line and station of the calling subscriber, point 2 bench 8t wiper B of the call switch, TC 'sa, bench and friction B of the researcher of the connection circuit, T 51', T 44, 22, en2-oule, .-ie.nt lower of relay 1 and earth.



   'The:.', '? - not sensitive to alternating current, not yet working. It will only work when the subscriber goes off hook because his winding is then traversed by the direct current: 'earth, T 55,' R 24, T 61, lower winding of relay 6. and battery .. relay 5 short-circuits by T 65 drops out., closing in R 51 and R 55 the rail 2 circuit on the button
 EMI31.3
 requested key.



   Relay 2 comes into action and cuts in R 24 the holding circuit of relay 6 which drops out.
 EMI31.4
 



  - Communication count - During the beat '' produced by the attraction of the
 EMI31.5
 relay 6, then the fall of r31uis 5; Uns terre is Elise on the calling subscriber's meter, who enters a
 EMI31.6
 communication as a result of the connections: T 65, T 56, wiper and bank C of the connection circuit searcher, 'TmC 34, brushes and bank of the call searcher, winding of the meter C and battery.



  Relay 5 short-circuits at '1' 63 drops out, opening at T 56 the attraction circuit of counter C.

  <Desc / Clms Page number 32>

 
 EMI32.1
 Conversation circuit -
 EMI32.2
 The connection circuit p, r # ut to Oc. moment of con-rss.tion.: n tr: 1, os d ux postas c1ualandGur ut d, nindé, 1 ", s dux <'rott'irs ;, du pr \ :;' [1ie; r if: 1 <; ct8ur it of the chorchdur of the circuit of the connection are r;, li,> s nsnible by 10,
 EMI32.3
 circuit:
 EMI32.4
 T 51, T 41, capacitor, T 42, T 2 1 ,, - s d. ,,; \ 17 tru-Cteurs B are joined. <., l Fr 1-a circuit: T ¯1 ', T 44, cond, ns8tur, T 5, R 55, T 32'. In T 21. 1'al'i.'1cntation is reversed; on the subscriber d ,. ; and..ur, Les J ', 1, Üs cu work dac1S the circuit> connection, p'Jndaêlt 1; .coni. rs <t.ion are: a) lu r.-lais 1 which "li.ic.nte the subscriber d.and.ur.

   It is placed under the 1danco l: clusiv .. of the subscriber èL, ne ... 1dvur. h) 1 r \ :. lis 2i (him 8li "vntb the abcnncé d ..; ian4é. Il 'A3t pir-cë scus 1'-' dL, .ndanc =., .xclus1vG dv the acid subscriber. c ) Read:; lrÜs '.' .., t 4 which are 1; .. J relay due to maintain the cûnnxion circuit.



  L,. # Third ... the it. st òrné duux sections, co- t ch. cti .... ir ..t coke se1Jctur. connected, ;; J '\. 3vn (Jlu by contacts T "5 / j, t <.t .Ôb.



  L .. circuit (10 .. connection \; st signals in OCCPj) 2.- tion, 1 <, wax L of relay ci.,.; 1Ísû., n mar ... l \: Cl being open in R 35. LJ broached] B: on las 1) [l10.S c1'Js 0) rch .. urs des, r, istr,. \ 1rs .st purte 'au pr, t¯.ntil of the pcl: native (L la' rtv.ri. ,, had yes c nstitu :. the polarity where occupation.
 EMI32.5
 



  .
 EMI32.6
 



  -Li; r; tion <1:; s ;; I6éan.; S un iifi dv conversation - The release iu connection circuit t p. ;; l1t have liu da qv.t-.tr .. different way, aylon 10 r8ccordvm ... nt <J; points -5-C-D-.



  : Let's read a: .'- in, .r 0, ;; 5 q1Jatr ;; case pcssibib da li .érc1t ion.



  I - Release by 10 1? R.,: I, r rost ,. who hung up - Lvs dots ::, 3 of a.:. on the other hand, CB on the other hand, are strappas ..ns;, màl,;, lcrscuc 1:. '. ost ..: d; 1and "ur r.3ccrocb ,; 1 .; rT., ii" r, l . relay 4 ist short -cirouitd by 1 circuit: turre. Rll, points': .B, relay .z, .. t terru

  <Desc / Clms Page number 33>

 
Relay 4 drops out, opening at T 43 the holding circuit of relay 3 and the holding of seekers and selectors. Turns the engaged organs are released. If the called party has not yet hung up, he is given on his relay F and receives the busy signal via a circuit already described.



   When the requested extension hangs up first; relay 4 is short-circuited by all of the earth connections, EC pads, rest G2, R 53, T 33 ', winding of relay 4 and earth.



   Relay 4 drops out, opening at T 43 the holding circuit of relay 3 and holding the searchers and selectors; all the organs in engagement are released. If the calling party has not yet hung up, he is connected to his relay F and receives the busy signal via a circuit already described.



   When the subscriber hangs up, his line relays will be put back to idle.



     II - Release by the calling station -
The points Le% and B are met,
Hanging up the called station has no effect since point C and therefore point R 23 is not connected to the earth at E. When the calling station hangs up, relay 4 is short-circuited by the connections: earth, R 11, '' points AB, winding of 4 and earth.



   Relay 4 drops out, opening at T 43 the holding circuit of relay 3 and holding the searchers and selectors. All the organs in engagement are released. If the called party has not yet hung up, it is returned to faultc and receives the busy signal via a circuit already described, - Release by the requested set -
Points A and D on the one hand, C and F on the other hand, .. are strapped together.



   The points and. D are assembled to allow the release 'by the calling station of the devices engaged before unhooking. Of the called subscriber, at this moment only ;, the circuit; connection falls under the exclusive dependence of the requested subscriber.



   When the calling station hangs up, nothing happens, points A and B not being linked. When the called station hangs up, relay 4 is short-circuited as a result of the connections: .. earth,, point ± ,, point C, R23, R 62, R 53, T 33 ', winding of the relay 4 and earth.

  <Desc / Clms Page number 34>

 
 EMI34.1
 



  L- relay 4 reto open n T 4J the relay maintenance circuit. 3 5 -t 1 ,, c, t searcher dis- selector maintenance. All the organs we took: .. are free.



  If the subscriber dü "18nd''Jur ni worse not yet rar; hooked, he is connected to his relay r 0t receives the busy signal pr un cii, c, iit d .. '! A. described.



  .Liberation by the d "r.rÜr-r who hung up. - The dots, -C-D feel t.rar-s 0üs: O: iJhle.



  Lcrsy ;; 1 .-- s extensions fle ...- n, À:> 1Jr -.t rtu n'nd \ 3 hung up all 1,1-.s, i11JJ, le r 01 ± 1i3, .1, #st cuurt -circuitë as a result of connections: terre, Fll, c.ints # and. C, R. '3, 11 62, R 53, T J, 3',; nroul: ,,:; nt do 4 ut t'jrre.
 EMI34.2
 



  Relay 4 drops out, opening in T 45 cirouit
 EMI34.3
 to maintain relay 3 and Io inti3n researchers and
 EMI34.4
 selectors. All the organs involved are freed.
 EMI34.5
 



  The 1-D points are combined to allow the libu'r-tic, n by the requesting iicst3 of orranqs engaged before the d,:, cl'ochsge d6 1 r% 1bG?:.: 11.u.,: # # ;; - i <ié. I. ce .nC, 11Gnt the s0'.J.lc.,. C:. '1t, the pass circuit, under the :. t = -pen- d, no of the two ibonn0s.



  . CC0up.tion of a bundle of lines -.; ' there is no li ', n.> libri in an oxplorc bundle in 1Utl selection:, ;; tick, the rotation of the selector continues. FrottoJr C of the selector when passing a certain position of the selector, closes the circuit of the relay a; c. Registers it (figure 4): secondary of transformer TI '1 (figure 5) rectifiers RD 1 or RD 2 in 1: direction of the current, point 23, T 56 ', R-fold, contactor CC of the searcher of the recorder, pin 12 (figure 2), bJIQis 1 of the prsr2i: r selector, a pin of the bench connects at point 17 (point 17 is mul- triple grur tons the o'1rr;) p, istJ7:? 111'S it on all bees, nudes of Pr-icrs and s,) drives of c (; nt2ines), enrol. l1ement in 'gé.rieir i1J r-; 1; -, is 22 (figure 4), 2D rectifier U, T z, roint 24 (figure 5) rectifiers pu' 7; or HD 4 in the direction of the current, secondary of the TF1 transformer.



  L ,. relay SO Antre then in action, consequently
 EMI34.6
 connections:
 EMI34.7
 tnr1'o, T 51 ', R 161, T eue21, R 211, coil of relay 2E -and battery.

  <Desc / Clms Page number 35>

 



  The holding circuit of relay 20 is closed
 EMI35.1
 in series with relay 21 in T 2Gx. L. relay 21 short-circuited in 'R-211 and T 221 cannot come into action * when the selector slider C has crossed the energizing position of relay 2) ce..relais r:) to: i1; e) removing the short-circuit of relay 21 which attracts its armature and
 EMI35.2
 is maintained in series with relay 20.



   When the selector trotters again meet the bundle of lines to be borrowed, two cases must be considered: - the selector encounters a line which has become free since the first exploration;
 EMI35.3
 r the summer does not meet again any, line l: 1, br.e, a) The selector renews a line that has become free -.

   When the slider C has reached the level of the first line of the beam to be explored, the relay 15 of the recorder is at work, its circuit being closed by the control wire. as indicated above.
 EMI35.4
 Aa passage on a 1J.bre line, the test relay 14 is not activated, cutting off the selector rotation circuit at ni 141. After the normal test of the line, the relay 13 drops out, closing at R 151 the changeover relay circuit
 EMI35.5
 16, The recorder p, 5s.3e on 1 '; next position, which corresponds to the selection of the c ^ nv selector: inés ,. L. 161., the 20% and 21 relay holding circuit is open.



  Cus;: laà.s.; Come to rest and are ready to go, to, again for the next selection tag'8. ' b) The elector does not meet any free line again -
The selector trotters again pass the bundle of lines to be scanned and pass once more on the bench position connected to point 17. The relay 22 returns to work because of the previous circuit; , but this time, it is maintained on bonding by the circuit: earth, T 51 ',. R 161, T 221, T 211, relay 23 and battery
L.,:, Relay 3 -, the logger is short-circuited by the connections: earth, T 51 ', R 161, T @ 21, T 211, T 222, T 215, winding of relay 3 and earth .

  <Desc / Clms Page number 36>

 



   The fall of relay 3 causes the release of the recorder as well as the components which
 EMI36.1
 when communication is established, the calling subscriber is connected to his relay F and receives the busy signal, as specified above, - Call for special services -
It may be useful to call certain services by
 EMI36.2
 a knot of Chiff8d different from 4 and to orient the first selector by two digits instead of one ..



   To explain this possibility, we planned that the telephone numbers of these services would start
 EMI36.3
 by the number 1 and bare these lines are found in 1111, .11 multiplied on the benches of the first selections. We have ad., Iis also, to explain another possibility that calling and counting would be suppressed in this case.



   It is quite obvious that it is possible not to
 EMI36.4
 3UpDri;, er calling and counting ', and that the selection by two digits is not linked:; ïitee fu digit 1, 1101 ::' 1:18 first digit,: but this first digit can '' 'be any; likewise, it is possible that several different first digits give this possibility of selection by two or more digits on the first selector and with or without calling and counting.



   The number 1 is received and recorded by the
 EMI36.5
 ; digital lens of thousand XI (figure 4). At the end of the sending of digit 1, relay 4 short-circuited, long enough to exhaust its delay and let go of its armature, thus reestablishing its rest contacts.
 EMI36.6
 



  The circuit of rel, is 2 '.') Is then formed co, nme follows': earth, T 51 ', sector b rh the digital 8 l' current XI in position l, -7q 43, upper winding of 2j and battery ,
 EMI36.7
 Relay 2z closes a holding circuit :. earth, T 51 ', T 223, bottom winding 23 and battery.



   In R 232, it cuts the pass circuit of X5 after the reception of the first cipher. The passage of
 EMI36.8
 coi3lineur X5 on the positive. ' 1 should only be done after receipt of 4. <; uxiein c? iii '± te, which will determine the bundle of auxiliary lines 1. to reach.



  The second digit is Tiqu zut enrogidtré by the numerical element of the hundreds X 2. At the end of the sending of the second digit, the relay 4 short-circuited for a long time, opening in T 41 the attraction circuit of the distributor. -input XI, which passes its brooms
 EMI36.9
 on the positào f.3.

  <Desc / Clms Page number 37>

 
 EMI37.1
 



  With Jy3 .second .. cipher recorded, the selection of the first selector can begin. For this purpose, 1; corqbi-eur X5 goes to position 1 1 p: p series of connections: earth seoteur e of input distributor XI, en. position 3,? 232., -plc-t h of X5 in position 0, reset, winding of the electro of X5 and battery.



  The combiner X5 brings its brushes in position li Sur 4iati; j., position .. 1> circuit due to the rotation of the selector RS is closed as it was indicated above. Only the controlled stop circuit differs from what it is in the case of a call from a subscriber. The control is effected by the position of the digital elements. XI The relay circuit 15 of the recorder is fvrm, é: secondary of, transformer, .ur TF 1 (figure 5), rectifiers Ruz 1 or RD 2 in 1 ... direction of current, point 3 (. figure 4), T 5E ', R 121, recorder seeker trotter C2, plot 02 (figure 2);

   trotter G du pr'Yl; l,.:; r, seLct <: - ur,, bench studs connected to point 12 (fig.4)) sector b d., digital element X2, sector a of the digital element X, 1:; n position l, wire 1, pin g of the combination X5 eh position 1, R; 51, R 181, the two windings of relay 15;:. N serina, 1 1 <:, àr-ssc, Jr RDI in the current without, T 55, point 3.4 :, 'figuru 5, redoresor RD 3 or RD 4 in the current, swôonàairw of the transformer- TFI; harrf; lu t'jst, the test dj la iign,. ,, s'3rfic- tu.; nt in the manner indicated above = there-.n; J, 1 # ntl Unu free line '' having. been found., . 1 relay 16 switches the combination X5 to position 2 as specified above * Combinour X5 must cross all the u1télhJurv selection positions.

   It crosses its positions as a result of conn,; xions: t.; Xr4, T 232 ', plots h in position 2-to-4-5; breaker, :: "nroulbïnunt de .l'élvctro ', 15 and battery.



  Lu ominator X5 ahienj sus brushes on position 6. hard: ctt ", position, 11.nr,; gis, tr, .i-ir must establish the connection of the connection circuit on the ligie- c, ..: v7andé. . un; mpchant, on the one hand, the sending of the inrush current to the line of! - mandéu, on the other hand, part, read function,; m;: nt of the meter of the
 EMI37.2
 the requesting subscriber.
 EMI37.3
 



  In 'c, goal,' 1; relay 6 of the connection circuit is: is n actioned by. suitu of the connections': tvrr0, R 178, pad d, of the combination "" ur y5 a position 6, rest 213, T 3I, point 24 (figur .; 5) rectifiers RD 3 or RD 4 in the direction of the current, secondary of the TF1 transformer, point 2? (fig'ire 4), T z ', T 231', R 214, plot b of the combinour; '5' jn position 6, R 176,

  <Desc / Clms Page number 38>

 recorder searcher D wiper; bench pad (figure 2) rectifier in the direction of the current, upper winding of relay 6 and earth.



   When relay 6 comes into action, relay 1 is energized as a result of the connections: earth, R 35, T 64, upper winding of 1 and battery.



   Successive-link relays 4 and 3 come into action as has already been mentioned previously;
Relay 6 is maintained by contacts T 61; R 24, T @ 5, until relay 2 is energized, when the requested station answers.



   Counting cannot take place, relay 5 being at rest. The meter excitction circuit is open at T 56. Inrush current cannot be sent on the line; relay 5 not having worked.



   It may be useful in certain cases to eliminate the feed bridge and to connect the seekers and the selectors metallically. To make the operation possible, we assumed that when the first digit is 7, the power bridge is removed. It is obvious that the feed bridge could be linked for another digit than 7 or even for a nonbridging of several digits.



   The metal connection between the chdrchers and the selectors is realized by the combination of the two relays 3 and 4, which also serve in the normal cases of use of the connection circuit. On position 6 of the X5 combiner of the recorder (figure 4), the relay 3 of the connection circuit is energized as a result of the ccnnc; xions: battery, resistance, T 212, pad C, position 6 of the controller. bindur X5, R 177 wiper 1 of the recorder finder (figure 2), winding of relay 3 and earth ;.



  * Relay 3 is kept working on the test-selectear wire, on a power supply not shown in the diagram.



   .By the contacts T 31 and T 32 of a party T 31 'and 32' on the other hand, the two line wires are electrically connected.



    - Fake calls -
When the bogus call came in on a recorder, a meaty device was a. fixed duration, needle the ligie in false call on return lines which lead to jacks equipped with light signals

  <Desc / Clms Page number 39>

 call placed in front of an operator. These lines are multiplied on the banks of the first selectors.



   The first cam determines the entry into action of relay 24 as a result of the links; earth cam, point 19, T 5, top winding of 24 and battery.



   Relay 24 is maintained by the connections: T 242, R 41 ut earth in T 51 '. (if the calling subscriber numbers the holding circuit of relay 24 is open at R 41 and relay 24 drops).



   Contact T 241 closes the circuit of cam 2 which passes after a determined time, after the passage of cam 1. Relay 25 comes into action because of the connections: cam, earth, point 20, T 241, top winding of 25 and battery
The relay 25 is kept in action by the contact T 251 'and the earth. The first selector electro rotation circuit is closed as a result of the contact T 253'; battery, T 57 ', R 151, T 255', wiper R2 of the recorder finder, breaker, winding of RS 1 and earth.



   The controlled shutdown circuit is thus constituted; winding of the secondary of TF 1 (figure 5) rectifiers RDI or RD 2 in the sounds of the current - point 23 (figure 4), T 56 ', R 121, trotter C2 of the searcher of the recorder, pad C2 of the bench ( figure 2), control wire of false return lines, calls - point 18 (figure 4), R 234, T 251, R 181, both windings in, series. of relay 15, rectifier RD 1 in direction of current T 55, point 24, (figure 5) rectifiers RD3 or RD 4 in direction of current, secondary of TF1.



   Relay 15 comes into action. The relay circuit 13 is then closed: terrù, 'T 152, T 254, lower winding of 13 and battery.



   On the other hand, the selector rotation circuit is closed again: battery, T 57 ', T 151, R 141, T 134, T 254', T 253 'wiper R2 of the recorder finder, pad R of the bench (figure 2) R 11 winding and earth breaker.

  <Desc / Clms Page number 40>

 



   When the T2 wiper passes over a free line, relay 14 (-figure 4) is energized as a result of the connections:
 EMI40.1
 battery, winding of relay 14, T 153, T 253, wiper T2, contact TZ, (figure, wiper T of the first selector and discnibility earth on the line encountered.



     On contact T 141, relay 14 places the upper winding of relay 13 in shunt on its winding. The potential of the test pin therefore drops to one- !. value close to that of the negative pole of the battery. The line encountered is thus protected against any possible seizure by another selector, ,,
Relay 15 ui is a differential rail drops because the fluxes produced by its two windings are exactly balanced.



   Relay 16 comes into action following the connections: battery, R 131, T 142, relay 16 and earth.



   The same applies to relay 23 due to the connections: earth, T 163, T 252, lower winding of the relay
23 and battery, Its holding circuit is closed by the contacts
 EMI40.2
 T 4 ',, ,, T 51', and In t rre,
Relay 23, as we have indicated previously in the case of a call for special services, must connect the connection circuit to the forwarding line in a false call when sending inrush current, nor metering.



     The relay 2'6 fiat switch the combiner X5 to position 6 by its contact T 232. In this position, the
 EMI40.3
 Connection circuit connection is made and the e.11 '' '' gishrcur .ust released.



  It '¯.st quite obvious or' .- '; false call forwarding can be carried out regardless of the state of the selection, i.e. whatever the instant \ from which the subscriber 4r = ni, ndeiàr ¯1 lug d (! nuuurotc'r .



  L rr "cnerchc) of the linn? Dr. Forwarding in false call st toujoura <, ± f ',,;? Killed by the selector plum tree, L- relay 12 for connection of the first selector (figure. 4) before
 EMI40.4
 soi ", circuit d::; inti n open .on R 251 'drops out, cutting cI} T 12,2 le, 1, - ,, inti ,, r, d .: connection rctis already different ét, .p: cs: lw selection that are freed.



  Ln R 121, 1., circulated from Dr2t control is restored to the first selector, the control circuits being

  <Desc / Clms Page number 41>

 reestablished by the normally open contacts of relay 25.
 EMI41.1
 



  L-; secondary line finder represented:, nté figure .7 is located behind a pr '.: .1i.er S & 13c: ...' t, 1r, and has access to line equipment. 1 "relay D, ... is a relay conrnun to all they equip I1Gts of lines towards the same direction, and on the same group of secondary line finders. The very least availability is given by the contact. TD 1, held that there is a; .. free line in the bundle atone by the switch
 EMI41.2
 secondary line- Lo 8? 1etor; tests a free line secondary vomitator, having access to a
 EMI41.3
 pement d .. line 'ibru as a result of the connections: frottuur T du pr' ::: 1.ivr 's, L¯ctoùr RS .1, RCS 3, resistance, TD 1 t earth.



     The RCS switch rotation circuit is formed:
 EMI41.4
 battery in the, ¯nr'gi5tr (; ur (non r,; present in this diagram), trotter and bank B of the first selector RS 1, RCS 2, xuptuur t .nroul,; m.; nt of RGS and earth.



   The RCS researcher enters n automatic rotation,
 EMI41.5
 . the search for a free line equipment, this equipment being characterized by a resistant earth on the
 EMI41.6
 wire T. Au. passage of the wiper, T on a 'pad T corresponding to a free line, the stop relay of the
 EMI41.7
 .r6gis: treur (not shown in this diagram) works by following the links:. '' wiper and 'bank A of the, prt.:ier selector, ROS 1., - wiper and bank T of the secondary switch!: \ ::,., of, line, winding of the L ut earth relay.
 EMI41.8
 



  C ': stopping relay inturns the rotation of the line switch, then after testing the line, as already mentioned, establish the connection of the CSL for: battery in the recorder (not shown on this
 EMI41.9
 diagram) wiper ut bench S of the prl .- '' 1ic: r selector, RS 1, .. coil of relay CS;, t earth.



  L ... r,., Lais OS su closes a hold circuit via TCS 4 and the test lead-
In TdS 5, the relay of the line equipment L
 EMI41.10
 ., st maintained at 1 .; test wire.



   In   . TCS 1 and TCS 2, 1 s line wires are extended from the first selector to the equipment
 EMI41.11
 lineage
If, 'during the search for the secondary line switch, all' line equipment to which

  <Desc / Clms Page number 42>

 
 EMI42.1
 he has acnes, come to hearth occupied, the relay R drops, cutting in TD 1 1J ground of the 1.isnonib11ité 'which by the circuit; r5sistanct, RCS z, bench and trotter T of the first selector, maintained the r;. test of; the record-
 EMI42.2
 treur at work. The hush, of the relay of tust, caused
 EMI42.3
 in the recorder the disconnection of the pl '..... '11 <., 1 'slçct, ... llr.

   All the co'mmond,; s are carried over to the prt:;:; ibr selector which ..... ntr0 n rotation, looking for another secondary switch jd line ..,, having access to lii1 ', li'rL equipment. L ,; cycle of operations ost ra- rr. ,, born at the command of pr ....,: lLr sÔ11.ot = -u; <, as he has
 EMI42.4
 previously stated. '
 EMI42.5
 L: c 'iutat, ;; ur scondair du ligno CS r, presented figur- 8 vst placed vntr \' "two stages d:., Selection, We assumed, 0n outr '.-, that it vst placed,. ntr a r.d.: second selector S2 .t a third se18ctuor S3.



  Lu rlais is a relay common to all subsequent selectors, has access to,: 'C' :: li:.: S other selection stages cu aux 't-Jin = s lines, The availability is ensured by the contact TD 1 as long as there is a free selotur.do in the bundleG8U -xnloé by 1., secondary conniutatuur d lignu.



  L ..... duuxiëm sel "ct¯ur 'tS 2 rotates, - = n automatic rotation, he. Rch:, rch of plot C t11.1", indicates to him the position of element n .., nt nu eru .. d .; l ',', 'lr; gistrcur The circuit d., rotation of the 6L ctro ixs to st cut as soon as the brush C of the duuxie;, iq s:; l, .ctvur RS 2 has reached the broch, : control, coinm # it has been indicated. This circuit is closed by 1 '; ns .. mbl ..;: read brushes C of the ci,' l: ièmu sé1-sCtur, the pad of bank C, 1 = rdr, ¯s3 ", ur RD 1, read point 31,; tī rrt relay in not shown on 1 diagram. The <-u-.iéia.- s;, 1, ct: ur part u, .n <3uitu a free selection,? the ruchurc! J <"of a COülmutat" ur
 EMI42.6
 s ,, condair, d free line, having access to a third
 EMI42.7
 free selector. This switch, ur svcondairv \ Jst charac- terized by a., T-rr- resi., Both on 1 "bank T of the second selct: ur by RCS 3, TD 1 vt-t, rr".



  L, - d, UYièr; ", sel, ctvur arr.r; t. As soon as a switch, .ur li '.... has been found.



  'In (deprivation on 1., stop circ-iit by the in- of a r., Dr,; ssl: ur RD, fil -, e un r..delais dis- criain-t. ., nr ..ntr .:, .n action in gistr, 7ur. C.- r ,, - leave to work in ", iqu; à 1 ',. nr, é; istr; u>. he must continue 1 ^ sÔL :: tion freed, with ILs: n,%, 8 ele: n.,; nts which have; s, rvi 'for the selection of the second .sel-CtUr, after having previously established the con ';,: xion of the next selected ..., ctur S2. L- circuit of rotation iu co: uuutatur second- condnir- d ,. lign0, is then'fvré by 11-ns, -.-, nbl ,, of
 EMI42.8
 connections:

  <Desc / Clms Page number 43>

 battery in the recorder (not shown in the diagram) wiper and bank B of the first selector
RS 1, TS 22, coldness and bank B of the second selector RS 2, RCS2, breaker, coil due-switch
RCS and land.



   The secondary line switch searches for a third free selector. This equipment is characterized by the resistant earth placed on the T wire of the bench by RS 33, resistance and earth.



  When crossing this line, the relay. stop) the recorder (not shown in the diagram) comes into action and stops the otation of the secondary RCS line switch.



   The recorder tests this junction and then establishes the connection.



   The circuit of the connection relay CS of the commu-. secondary line controller being closed by wire 33 and.



   Un'contact of the discriminator relay of the recorder activated by point 32, as has been described herein. above*
By the working contacts of relay CS 1, the line and control wires are transferred to the third 'selector', on the other hand the recorder switches after connection of the secondary line switch, its combiner in position controlled selection of the third selector.



   It is obvious that the system described above is capable of other applications than automatic telephony. It can be adapted, in particular, for interconnection and electrical control purposes.

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


    

Claims (1)

CLAIMS 1) Method 'for the flow of traffic in automatic switching systems, in particular in tele-. automatic telephony, characterized in that it is based on the combination of two common automatic telephony methods, one which consists in assigning to connection circuits searchers connecting directly the calling line to the connection circuit, the other which consists in connecting this line to the connection circuit, through the intermediary of the finder of the connection circuit and of a call seeker, the researchers assigned to call seekers being taken only when all the researchers assigned to connection circuits are busy. ' ' <Desc / Clms Page number 44> 2) System for the application of the following process 1) characterized by the use of general organs known as "recorders" which command, control and direct the finder of the connection circuit and the call seeker in an exclusive manner, each recorder being linked to a certain number of circuits connection and a determined connection circuit which may depend on several recorders and in each recorder, the control, stop and test devices of these researchers are also those which control, stop and test the selectors. and connectors. 3) Living system 1, characterized in that the reception of the impulses by a recorder takes place through the intermediary of a correcting device mounted directly in series with the line and the dial. 4) System according to claim 3, characterized in that the recorder exercises control of the position of the selectors of the various selection stages without retransmission of pulses and without intermediate members. 5) System according to claim 4, characterized in that the control son of the selectors are multiplied by selection stage on all the recorders, as well as the control son of the connectors. 6) System according to claim 5, characterized in that the control, stopping and testing of the selector researchers or connectors are done by means of three wires and the maintenance of the organs by means of a fourth wire; the connection takes place, these wires used to discriminate between sets having several lines, allow stopping on a free line belonging to the called group if the called number is that of the first line, and only on the called line without search of free line, if the number dialed is other than that of the first line. 7) System according to claim 3, characterized in that the recorder searches for a connection circuit 'available. 8) System according to claim 3, characterized in that the recorder directs the call searcher to the call line. 9) System according to claim 8, characterized in that if the connection circuit is connected to a call finder, the recorder directly directs the call finder to the line in call. 10) System according to claim 3, characterized in that the recorder directly receives the dial pulses from the station on a pulse correction device. <Desc / Clms Page number 45> 11) System according to claim le, charac- terized in that as the recention of the pulses the recorder directs the selectors and searches for a free line to the next selection stage, with the same organs . 12) System according to claim 3, charac- terized in that the recorder connects the selectors or connectors afterwards. looking for the free line. .. 13) System according to claim 3, characterized in that the recorder allows the control of secondary line switches, either after a selector or between two selection stages, ..14) System according to claim 3, character - ized in that the recorder allows forwarding, either in occupancy or on special lines placed at any point in the selection stages, when the selector has explored, at least once, all of the lines forming the designated level without finding any free, 15) System according to claim 3, characterized in that, according to the number received, the recorder controls' the connection of a connection circuit with six relays, or when the calling station is powered, the called set is rung and a counting pulse occurs when the called set goes off hook, i.e. when the calling set is powered, the called set is powered without being rung, there is no counting (the counting is extended on the selectors) or finally when the searchers and selectors are metallically connected without any bypass, the relay used for this connection can be maintained, as well as the searchers and selectors relays, through the diary of another organ to which these devices can be connected .. 16) System according to claim 2, charac- terized in that the release can take place by simple connection displacement, either by the first station which hangs up, or by hanging up the requested station, or by the last which hangs up, 17) System according to claim 2, charac- terized in that the mixing of all the control wires by selection stage with all the recorders is carried out by closing the control and stop circuits on a device specific to each recorder transforming the alternating current into isolated rectified current, this device allowing the recorder to prepare a, 3 command which can be indicated to it at any point in the chain of devices <Desc / Clms Page number 46> used to establish communication. 18) System according to claim 2, charac- terized in that the power supply of the researchers, selectors and connectors is carried out such that the fuses and thermal coils can be centralized in each recorder. 19) System according to claim 2, characterized in that the traffic can be distributed to the recorders by a device which turns on the recorders when the requesting station is picked up, the number of recorders running simultaneously being equal to the number of distributors contacted by the call line. 20) System according to claim 19, characterized in that a distributor can record a certain number of calls and determines the start-up of as many registrars as he has recorded calls. - SUCCINCT SUMMARY Method for the flow of traffic in automatic switching systems, in particular in automatic telephony based on the combination of two common automatic telephony methods: - one which consists in assigning researchers connecting directly to connection circuits. the calling line to the connection circuit, - the other which consists in connecting this line to the connection circuit via the searcher of the connection circuit and a call seeker, the researchers assigned to call seekers taken only when all the researchers assigned to the connection circuits are occupied. cupés. The invention also relates to the system for the application of such a method, essentially comprising the use of general organs known as "recorders" which command, control and direct the researcher of the connection circuit and the researcher of the connection circuit. 'appeal in a non-exclusive manner.