PL20191B1 - Telephone device. - Google Patents

Description

The present invention relates to telephone devices, and in particular to those telephone devices in which line dialers are used to connect the lines of the calling party to the first group dialer. The present invention aims to reduce the number of first group selectors needed without thereby reducing the high-traffic capacity of the device. In a telephone device that contains both primary and secondary selectors, some secondary line selectors are provided by the invention. so that they are only used during high traffic congestion. In a telephone device containing a certain number of dial groups, the selectors of each group are divided into two classes according to the invention, while second class selectors are used only when the first class dials of all dialer groups are busy. Telephone devices that contain groups of line dialers, consisting of regular dialers and overflow dialers, only used when all dialers normally in the group are busy , you choose usually cooperate, according to the invention, directly with the All overflow selectors have access to a common group of other group selectors through nonnumeric secondary dialers. The invention is described by the title of an example when considering the drawings consisting of Figs 1 to 8, of which Figures 1-4 show the circuit layout of one embodiment of the invention when positioned in the manner shown in Figure 8, and Figure 5-7 are a schematic diagram of a cable system. "In order to make the general outline of the above diagram easier to understand, the cable system shown in Fig. 5 will be described initially, even before the detailed description of the circuit operation, in telephone equipment of any capacity, in which dialers are used. lines to make calls to calling subscribers' lines, it has been found that it is best to divide the calling lines into groups of 200 lines with each line so that each group is served by a separate group of line dialers. The line is, for its part, divided into two groups of 100 lines (denoted by the letters A and fi), each of which is normally operated by an appropriate subgroup of line selectors, controlled by a separate set of ordinary instruments, associated with this subgroup by means of a distribution coupler. Each 200-line group was provided with sufficient number of line selectors to meet the most traffic. As group dials in such devices typically work directly with line dialers, it is obvious that an appropriate number of group dialers should be used. It should be noted, however, that the greatest volume of telephone traffic in all 200-line groups can never occur simultaneously, so the number of group dialers used can be significantly reduced, however, so that the station device always has an excess of so many dialers. As many as needed to cope with the highest volume of traffic in any group of lines. This condition is satisfied by the device of the invention in such a way that some line dialers work directly with group dialers, which corresponds to normal telephone traffic, while others line dialers, which are used only during the highest traffic , they do not work directly with group selectors, but can work via nonnumeric connections with other selectors, grouped, shared by the entire exchange. Due to this combination, the number of group selectors needed can be considerably smaller than the number of line selectors. Since line selectors are always available to any group of group searchers during their peak traffic, the machine may maintain some normal traffic flow. With the cable system shown in Figure 5, note that the so-called calling subscriber SUB normally has access via an ADR splitter to the usual group dial group RFf connected via an intermediate dial frame IDF with the common dial group RS. Under abnormal conditions, however, that is, when all of the usual group dialers are busy, the subscriber gains access to the OF overflow selectors, which are connected by means of an intermediate IDF distribution frame and secondary connectors seeking SNFs, with electors in the group of the common CS headquarters. Each secondary finder is connected directly via the dashboard to a selector in a common group. Each group may have more than one secondary finder, and the secondary finders are then used sequentially under the influence of the SCD secondary distribution board. To further improve the operation of the device, two selectors in the same serial group do not have access to one and the same selector or to a group of selectors in the common group. In order to more fully illustrate the implementation of the latter device, Fig. 6 shows a further cable layout of the three groups of retrieval connectors served by the splitters ADR1, ADR2 and ADR3, respectively. Each finder switch has access to its own group of common line selectors RF1, RF2 and & F3, while in heavy traffic it also has access to its group of selector which are linked to one of the SNF1, -SNF2 secondary selectors groups. Now, considering the group serviced by the ADR1 splitter separately, it should be noted that the first overflow selector is connected to the group containing the SNF1 secondary selector through which the overflow chooser may be combined with one of the subgroups of common selectors. The second overflow selector, operated by an ADR1 splitter, is connected to a group containing a SNF2 secondary selector, whereby this overflow selector may be combined with one of the sub-selectors in the common group, which subgroup includes other selectors rather than a subgroup. to which the first overflow selector has access. Likewise, a third overflow selector in the group in question is coupled to a third group of secondary selectors in order to gain access to an even further subgroup of common selectors. The second and third groups of dialers, operated by means of ADR2 and ADR3 distributors, were arranged in a similar way, which results in the fact that the efficiency in handling telephone traffic was increased due to the fact that each overflow dialer can be combined with dialers as much as possible. common in different subgroups. After this general description, the principles of the invention will be described in detail with the meanings of the individual circuits and the connection sequences. The diagrams of FIGS. 1-4 illustrate the individual circuit arrangements. Fig. 1 shows a typical subscriber line circuit employing two relays and a counter with a battery equipped with an auxiliary generator; Fig. 2 - circuit layout of a linear selector that can search simultaneously on two levels, Fig. 3 - distribution switchboards ADR for group A with common control relays, with a part of the group on the right side of dashed lines. B, sufficient to understand its operation; Fig. 4 shows an indirect connection on the IDF distribution frame between the selectors and the bulkheads, the controlling group selectors, the secondary SNF finder and the secondary SCD distributor. Considering Fig. 1 separately as part of the overall circuitry, it is first assumed that the ordinary seeker has access to a group of line selectors serving the normal call line. When the subscriber, connected to this line, removes his handset to initiate a call, the circuit is closed, ground, battery, downstream coil. ¬ kaznika L, anchor kin cables 10 i //, anchor k2 and ground. In this circuit, the relay L is energized and attracts its anchor Lv, thereby forming a circuit: earth, battery, lower relay coil k, anchor working contact Zlf, upper relay coil L and conductor 12 to the corresponding the contact in the contact row of the cable running from the finder to determine this contact. In addition, the relay L still grounds the common starting conductor 13 at the anchor 12 in order to establish a contact corresponding to the level at which the evolving line is connected to the vertical selector cable. The circuit of the start-up relay ST in the control device of group A is then closed (Fig. 3). This circuit has the following course: earth, anchor K3, anchor / 2, conductor 13, resistor 14, conductor 15, Yb4, zb4 and vr2 anchors, ST relay coil, battery and earth. The group of resistors 14, each belonging to one contact to be determined, is on the one hand common to the starting relay ST, and on the other hand, is individually connected to the individual contacts of the vertical series, with the starting conductors 13 being common to each level. Thus, by earthing one of the starter conductors, the inrush relay ST is triggered, at the same time providing an appropriate series contact corresponding to the trigger level by means of direct earth, all other contacts are only marked as grounded through proportions 14 to distinguish the trigger level from the non-trigger level. The excited start relay St thus prepares at the anchors sll and sl2 (Fig. 4) the circuits of the transmitters TA and TB, whose operation will be The day described below, and at anchor st3 (Fig. 3) completes the circuit of relay SF, and finally at anchor st4 prepares a common circuit of relay LR and interrupting relay G. It should be noted that the switchgear ADR, connected to the group And the selectors are made so that they pre-select the free selector, indicated in fig. 2. All the selectors are made so, and when they are occupied, then it is grounded as appropriate. Poor serial contact, interacting with the brush 2a, thanks to which the circuit is closed, extending from the ground through conductor 16, brush 2a, anchor resting contact yb2, low-resistance right relay coil LK, resting contacts sl1 i / r3, adm-interrupting springs, high-resistance left-hand coil of relay G, for battery and ground. Only the relay G, due to its high resistance, operates in this circuit and, at its anchor, closes the following circuit: ground, anchors head and lk6, electromagnet DM, battery and earth, in order to excite the electromagnet DM, driving Distribution switch, so that the brushes can be moved to the next group of series contacts. Since now the relay circuit G contains springs breaking the adm electromagnet, there is an interaction between this relay and the DM electromagnet, causing the brushes to shift strongly until it comes into contact with the first free search. In order to avoid malfunctions due to disconnection, which may occur in the series of contacts that interact with the brush 2a of the switchgear, the switchgear ADR can search for a battery at the time of initiation of the call, so that the finder is not used until then when it is not marked free when a battery potential is applied to the plurality of contacts of the distributor. When the switchboard is in contact, disconnected during the initiation of the call, the starting relay ST closes the following circuit: ground, active anchor st41 left coil of the relay LK, anchor rest contacts sff and vrs, spring dm interruption tines, high-resistance left coil G, battery and earth. Only the relay G, due to its high resistance, is actuated and interacts again with the driving electromagnet DM until the brush 2a encounters a free seeking contact, indicated by the presence of a battery potential on the corresponding serial contact. When a free finder is found, the G relay is turned on in the branch line running from the battery through the resistor YA (Fig. 2), resting anchors hb2 and ha2, springs (test socket BTI), resting springs ml, conductor 16, series contact and brush 2a of the distribution connector ADR, resting anchors yb2, low-resistance right-hand relay coil LK, high-resistance left-hand relay coil LK, anchors st4 and to the ground. Relay G does not operate under these conditions, whereas relay LK operates and at anchor Ikl closes the shunt of the starting relay ST; at anchor lk2 completes the local shunt circuit of the common relay YA running through the anchors ybl (the purpose of this circuit will be described in detail next); at anchor lk3 completes a similar local shunt circuit through the anchors junction and containing the common relay ZA connected to the group of overflow finders; at anchors lkA and lk5 complete the circuit of the relay SF with the course described next; Finally, at the anchors lk7 and / & 8, it breaks the points of circuits of the initially excited relays, not indicated here, corresponding to the relays YA and ZA, which are in group B. The position of these relays is, however, quite similar to the position of the relays , marked with the same numbers in Fig. 3, where these relays are surrounded by (dashed rectangles, indicating their association with the relay LK of control group B. Looking at Fig. 4, it should be noted that the step-by-step connection between the IDF intermediate distribution frame is typical only for a given finder switch, switched off for partial secondary action, but in this example it is assumed that the call is supplemented with a group of common finders, with three upper tips in the case of ordinary finders corresponding to the negative, positive and tripping cable conductors in sequence, are directly connected in steps to the corresponding terminals of the selector, including In the case of this, the ends marked with numbers 17 and 18 are connected to each other by a shorting strap. The following circuit of the SF relay is closed on these connections: earth, resting anchor c2, shown in the lower part of figure 3, activated anchor lk4, resting anchor urK, brush 4a and series contact, conductor 19, resting springs Nx, conductor 20, short-circuit strip on the IDF distributor frame not visible, connecting terminals 17 and 18, conductor 21, serial contact and brush for ADR connector, activated anchor Lk5, anchor idle vr4, SF relay coil, battery and ground. In the above circuit, the relay SF is excited, shorting at its anchor sfl the left coil of the relay LK, which remains, however, in an excited state due to its right coil of sufficiently low resistance. As a result, the ground is still connected to the series contact of the selected finder via the brush 2a. The purpose of this is to prevent the selection of this finder by a different distribution coupler serving the same group of finders. Moreover, the indicator - 5 - SF interrupts yet! at the anchors sf2 and sf3, a common triggering conductor circuit 22, extended to all search switches in group A, and at the same time the circuits of testing relays SC and FC are prepared; on the anchor and sf4, the circuit of the lifting electromagnet VM of the selected finder with a tapping run is prepared: grounded working anchor sf4, resting anchor vrl, low-resistance coil C, brush 5a and serial contact, conductor 23, resting springs NRI , coil of the lifting magnet VM, battery and earth. In this circuit, the electromagnet is energized, which raises the shaft and the brushes to the first level, and a relay C operates, which on its anchor cl prepares another AC circuit, which then activates the lifting electromagnet, at anchor c2, breaks the initial excitation circuit of the relay SF, which, however, does not release immediately, because it is provided with a copper screw, at the anchor c3 prepares the circuit of the right coil of the interrupt relay G and at the anchor c4 activates the VR relay, which closes immediately at its anchor vrl and remains in this state until it is fully completed connections. The VR relay breaks the initial excitation circuit of the ST starting relay at anchor vr2, at the anchor vr3 it prepares the circuit of relay G, at anchor vr4 it prepares the shunt circuit of the relay SF before this relay becomes de-energized due to the break in its circuit at anchor c2, and on of the anchor vr5 prepares a point in the pulse circuit of the rotating electromagnet RM. When the shaft and the brushes performs its first vertical stroke, then the non-native springs NI, N2 and N3 start to operate (Fig. 2), from which the springs NI prepare the circuit of the electromagnet cajac 7? Af, the springs N2 break the point in the circuit of the common relay YA, and the springs N3 close the point in the circuit of the release solenoid ZAf. When the lifting electromagnet improves its stroke, then the corresponding springs vml will be activated, it closes the circuit as follows: earth, springs vml of the lifting electromagnet, conductor 24, series contact and brush 3a of the ADR connector , resting anchor 63, active anchor vr3, resting springs dm, left-hand relay coil G, battery and ground. In this circuit, the relay G is excited and at its anchor it breaks the excitation circuit of the lifting electromagnet VAf, as a result of which this electromagnet demagnetizes, and because the corresponding springs vml are located in the circuit of the relay G, they interact between the relay G and the electromagnet VM, the result of which is the lifting of the shaft, the rotary brushes and the vertical brush VM, while the lifting continues until a contact is encountered, determined in a vertical series. the calling subscriber line, the toothbrush VM encounters a direct earth, connected to the circuit indicated previously, as this circuit is extended to the battery and to earth via the idle springs NR2, conductor 25, series contact and brushes 6a combined the ADR, the anchor c3 is activated and through the left coil of relay G. Therefore, the relay G remains active during for a longer period of time, regardless of the closed circuit on the springs vnl, and since the anchor gl breaks the circuit of relay C, this relay releases slowly in order to switch the pulse circuit to the electromagnet rotating RM. The relay - 6 -C also breaks the shunt circuit of the right coil of the relay G at the anchor, and after the release of this relay the following circuit of the rotating electromagnet is closed: ground, anchor actuated lk6, anchor at rest, anchor at rest cl, anchor triggered vr5, brush 4a and series contact, conductor 19, springs actuated NI, coil of the turning electromagnet RM and to the battery. In this circuit, a rotating electromagnet is energized and moves the brushes into contact with the first group of series contacts at a selected level. After the first rotation of the shaft, the rotating non-native springs NR1 and NR2 are activated, by the springs NR1 a point in the circuit of the lifting electromagnet is broken and the circuit of the input switch HA is prepared, on the springs NR2 a point in the circuit that runs through vertical brush VW and the circuit of another relay switching HB is prepared. As a result of the rotation of the rotating electromagnet, the springs rml are actuated, closing the previously indicated circuit of the relay G, which energizes and breaks the circuit of the rotating electromagnet. As a result of the interaction of the G-relay with the RM electromagnet, the brushes move until they touch the evoking line, which was marked by the connection to it of the battery potential through the coils of the K and L relay, connected in series). When finding the line causing the brush, the map PI or P2 encounters the determining bacteria, and since the indicated circuit is connected to the PI contact, the following circuit is formed: earth, battery, lower coil of K (Fig. 1), anchor lf upper L relay coil, conductor 12, serial contact, brush PI contact, conductor 26, serial contact and brush 7a of the ADR connector, right relay coil SC, active anchor sf2 and to the ground. Relays KL and SC operate in this circuit, the first of which, on its anchors, k2, disconnects the line evoking the boat of its normal battery and from the ground, and on the anchor k3 it disconnects the ground from the starting conductor 13 and prepares the meter circuit. Returning now to the consideration of the operation of the SC relay, it can be seen that this relay prepares its own shunt circuit at the anchor, running to the grounded anchor vr6, and at the anchor sc2 it completes the following circuit: earth, anchor sc2, coil of the CS relay , anchor cl and vr5, brush 4a and series contact, springs Nlt turning electromagnet RM, battery and ground. In this circuit, the RM electromagnet does not work, but the relay c3 works, closing the following circuit: ground, anchor activated csl brush 6a and series contact, conductor 25, springs activated NR2, relay coil HB, battery and ground. P encounters the trigger line, then the FC relay will be triggered, closing the following circuit of the HA relay: ground, sc2 and fc2 anchors, brush 5a and series contact. In the event of a modern closure of the trigger circuits, conditions may arise in which both the series contacts P and PI are determined simultaneously. In this case, one of the relays SC or FC will be energized first, since it is assumed that no two relays have identical operating characteristics; In any event, however, it can be seen from the drawing that the circuit arrangements prevent the simultaneous operation of both switching relays HA and HB. - 7 - The HB relay prepares its own shunt circuit at the anchor hbl; at the anchor, hb2 connects the trip cable conductor to the trigger circuit; at anchor, hb3 interrupts a point in the circuit of the tripping solenoid ZAf, and at anchors hb4 and hb5 it connects the evolving circuit to the corresponding first number switch, which, as already stated, is connected by means of an IDF intermediate distribution frame and broken conductors, as shown in FIG. 4. After the first number switch has been seized, the ground is switched backwards through the conductor of the trip cable 27 in order to keep the switch relay HB active. Under these conditions, the right coil of the IK relay in the control group according to Fig. 3 becomes compact, and thus the relay becomes demagnetized because the lower end of said coil is connected to earth via the anchors sl4 and sll, and the upper end is connected to connected to earth via: anchor yb2, brush 2a, series contact, conductor 16, coil springs, BTT power socket, trigger cable conductor 27 and to the ground. Due to the magnetization of the relay LK, the circuit of the starting relay ST is broken, so that the relay always trips, even in the case of subsequent trips, when the earth is almost permanently connected to the starting cable. The ST relay, demagnetizing itself, breaks the circuit of the Si7 relay at the anchor sl3, which at the anchor sf4 releases the relay VR in order to re-engage the starting relay ST at the anchor w2, and because the brush 2a is now connected to the grounded contact, the relay G then reactivates to move the brushes until they contact the next free seeker. Consider the case now that all group A finders are occupied. Then, thanks to a special layout of the circuits, the connections will automatically reverse towards group B, so that all subsequent calls to group A will be handled by seeking links placed in group B. The method will now be described effectively This reversal of connections can be seen from Fig. 3 that the common relay YA remains normally active in the following circuit: ground, resting anchor tb4, right, high-impedance relay coil YA, resting anchor lk7 (surrounded by a broken square, to indicate its relationship with group B), resting anchor lk2, conductor 28, large resistor IYB. N2 resting springs, zml, resting springs and BTJ occupancy test socket, hal and hb2 resting anchors, IYA and battery resistor. The circuit in question runs through all of the normally connecting seekers in group A that are in the normal position, i.e. that the relay YA will only be able to demagnetize when all finders have been taken into service. Now considering the state of the last search of the group. A has been put into service, it can be seen that the remaining set of springs N2 in the selection circuit is open, but because the LK relay is also operating at that time, therefore the relay YA is excited in the local circuit running from the ground through the batteries, a resistor, the windings on the YA relay coil, the anchors launched lk2, the resting anchors ybl, the high-resistance relay coil YA, the resting anchors tb4 and to the ground. When the finder finds the trigger line, the relay LK will magnetize as already described, as a result of which the circuit of the relay YA will be broken, which, therefore, will open on the anchor yal will close the circuit of the overflow relay. YB, which at anchor ybl will break a point in the circuit of relay YA; on the anchors yb2 and yb3 will switch the circuits of the relays LK and G. (The gel of this switch will be explained in more detail when describing the partial secondary action); at anchor yb4 will switch the starting guide in group A to the starting relay in group B, shown to the right of the dashed line; and at anchor yb5 will prepare a further section of the start-up guide. As a result, further calls to group A will cause the relay to operate in group B, so that calls will be supplemented by means of ordinary finders specific to group B. When all finders usually in group B are occupied , then the corresponding common relay YA, interacting with this group, is demagnetized in the manner described in the consideration of group A. This magnetization entails the activation of the corresponding relay YB, with the consequence that the starting guide of group A is switched back to in this group, the starting guide of group B is still connected to the appropriate starting relay. Therefore, further calls in group A or B were sent through the overflow finders associated with the respective groups. Note that when the finder in the usual group becomes free, then the excited transmitter LK in group A or B keeps the circuit of the common relay YA broken, until the connection is finally terminated, then it is safe to reverse the direction of action. (Red), i.e. when secondary finders are used, it should be noted that, in order to prevent the use of overflow finders when finders are normally available, the wires leading to contact lines 2a and 3a of the ADR splitter have been switched. that is, the conductors 24, containing the contact springs of the finder electromagnet in the overflow group, were connected to the contacts of the series 2a, and the starting conductors of the 16 secondary finders, the contact springs of the trip electromagnet have now been connected to the 3a series contacts. With this device, the number of contact lines required for the ADR distribution board can be reduced, since the selection circuits cannot be adapted in the same series of series contacts. for both regular finders and for overflow finders, until special measures are taken to prevent the selection of overflow finders while there are still normally available finders in the group. The finder * in the overflow group are cross-linked on the IDF intermediate distributor frame in the manner shown in Fig. 4, so that they can be linked to the free selector in the common group through one group of secondary connectors searching for SNFs. Considering now in particular the call in group A of the switches, when all the finders are normally busy, see that the relay ST is energized through the start-up conductor in order to complete the circuit of the relays LK and G connected in series, the last of which It works with the electromagnet driving the ADM divider, but this interaction continues until the brush 3a (which under these conditions is a brush that selects a free finder in a partial secondary group), which usually brings about until the battery potential is encountered. In this case, the relay G becomes short-circuited, causing the current to increase in the circuit, as a result of which the relay LK is excited by its two coils connected in series and performs the activities already described. of the above, the terminals 17 and 18 on the dashboard are not connected to each other by a strap, so the battery terminal is extended at the anchor lk5 through the relay SF, brush la and conductor 21 running to the contact row, and through the terminal 18, cross-connected with end 29. This is to determine the appropriate contact in the SNF secondary search line 4c, the contact series of which are connected multiple times with all the other linkers in the group. On the anchor lk4, a circuit is further prepared (FIG. 3) for actuating the relay DK (FIG. 4) which completes the circuit of the selected secondary search switch. This circuit has the following course: ground anchor c2 (Fig. 3), operating anchor Lk4, resting anchor vr5, bristle 4a and series contact, conductor 19, non-native springs NI, conductor 20, tip 17 of intermediate frame switch, cross-coupled to terminal 30, obi resting anchor, DK relay coil, brush 4b and series contact of secondary finder switch SCD, resting anchor sk2, and to the battery through a relatively small YD resistor. a further description of the mentioned call will be to describe a device by which the secondary finder of the SCD splitter selects the initially free secondary finder for SNF. Referring to Fig. 4, it should be noted that the series contacts 4 of the SCD distributor are connected directly to the ends of the frame with the conductors of the release cable, the appropriate selectors in the appropriate group, so that in the event of use of these selectors y, by connecting the earthing to the appropriate conductors of the trip cable, also the series contacts 4b of the switchgear will be determined. Assuming now that the brush 4b is in contact with the earth-potential contact of the distribution frame, a circuit with the following course is formed: earth, brush 4b, scm breaking springs, resting anchors dk2 and od2, high resistance GG relay coil, brush 2b and series contact, SNF secondary junction breaker springs, battery and ground. The GG relay is excited then and at its ggl anchor, through the dkl resting anchors, it closes the excitation circuit of the SCM electromagnet, driving the switchgear, and because the springs which interrupt this electromagnet are located in the circuit of the GG relay, this relay interacts with the said electromagnet Until the brush 46 encounters unearthed contact, which indicates that the secondary SNF finder and the corresponding group selector are free. Similarly, a pre-selection secondary free SNF finder is automatically selected, always ready as ready. It can be connected to the calling finder coupler. Returning now to the call in question, you can see that the relay DK, operating in the circuit already described, switches on the anchors dkl and dk2 the circuit of the GG relay to the SNM solenoid driving the secondary switchgear , and at the anchor dk3 also completes the circuit that runs from the ground through the anchors dk3, the upper coil is EKniknik FK, resting anchors fkl, activated anchors dk2, resting anchors ob2, relay coil GG, brush 2b and series contact, sleep break springs, batteries and ground. If the brush 4c of the SNF-10 secondary finder did not encounter the serial contact determined by the initial finder connector, then only the relay GG would arise in the circumscribed circuit and at its anchor ggl would complete the circuit of the driving electromagnet SNM. As a result, the relay GG cooperates with the electromagnet SNM, so that this cooperation continues until the brush 4c meets the contact to which the battery is connected via the conductor 21, or the low-resistance SF relay in the control circuit. When this occurs, the GG relay shunts and cannot continue to operate, while the FK relay is excited by its two coils connected in series, closing its low impedance lower coil circuit at its ankle fkl, which allows the Of the instructions SK and SF, the last of which starts the selected cut-off switch, as has already been described above. The SK relay, when operating, prepares its own shunt circuit at its anchor, and at the anchors sk2, sk3 and connects the dotted conductors with the negative and positive terminals, and with the trigger cable, running from the chooser in the common group, this has the following path: a patch connection on the distribution frame, SK relay anchors actuated, brushes 1c, 2c and 3c, other patch connections on the distribution frame and to the selected finder connector. During the ensuing development period, the SK relay is grounded through the tripping cable conductor, so that the secondary finder switch is active until the trip is completed. At the skl anchor, a point in the circuit of a normally active OB relay common to all SNF finder finders is broken. in a given group. On the other hand, when all these secondary switches are active, then the OB is released and at the anchor obi, in place of the DK relay, it grounds the serial contact of the corresponding distribution switch ADR, in order to indicate that it is occupied, at the anchor. ob2 breaks the initial circuit of the seek switch SCD to prevent unnecessary searches for this switch in the event that all the selectors of the appropriate group are busy. As a result, the ADR distributor moves automatically to the next group of series contacts. This displacement of the distributor is due to the closure of the tap circuit: ground, obi anchor, conductor 20, NI springs, conductor 19, series contact, brush 4a, resting anchors vr5 and kl4, springs breaking dm, left relay coil G, battery i to ground. This causes the relay to energize and the DM driving solenoid to engage in the manner already described - As already mentioned in the general description of operation, the circuit layout is such that in one and the same overflow or transition group, two finders are never served forgotten one and the same subgroup of forgers in the common group. When all the overflow finders in group A are seized at one point, the relay ZA, equivalent to relay YA, connected with the common group, releases and at its anchor thall completes the circuit of the relay ZB, which operates and at its anchor zbl breaks a point in the circuit of the relay ZA; at anchors zb2 and zb3 it breaks the selection circuits of relays LK and G; at anchor set4 it switches the common starting conductor in group A to the starting relay in group B, and at anchor set5 it prepares a relay circuit point OF controlling the overflow counter VM. Consequently, all subsequent calls in group A cause the starting relay to operate in group Bt and thus the call is made via the overflow finders in group B, since the mode of operation of these finders is quite similar to that of described in connection with the overflow finders in the A and B group, and in the event that at some point all overflow finders and usually are taken in both groups, it can be seen that the YB and ZB relays in both groups A and B are active, When considering the circuit under these conditions, it can be seen that both start relays are off, and the common start conductors of both groups are reversed to the OF relay to activate it when further triggering occurs. The CF relay terminates at its anchor ofl the overflow counter circuit OVM which registers the busy state of all groups. The subscriber, calling now, only activates the OF relay, because the lack of the dialing sound, which is usually obtained from the first dialer, indicates that this call cannot be handled. In the event of the Medu in the operation of the device, preventing the correct performance connection, the start-up relay ST remains energized for a little longer, i.e. longer than a certain period of time, usually three seconds, as a result of which, by means of book discs S and Z, mounted on a common shaft and delivering earth pulses at specified intervals time, the delayed signal device, including the TA and TB transmitters, starts to operate (Fig. 4). Now, looking at the circuits of this group in detail, it can be seen that the circuit of the upper relay coil TA is prepared on the anchor stl, and the circuit of the lower coils of this relay * The TA relay, having received an impulse from the target S, starts to operate in the circuit of its lower coil and closes its its own shunt circuit, which still includes the upper coil of the TD relay, which is designed so that it does not operate under these conditions, but only keeps said shunt circuit closed. Moreover, the relay TA prepares t: and the circuit of the lower coil of the relay TB at the anchor, after a suitable period of time, the earth is connected via the pulse disc Z in order to activate the relay TB, which at the anchor, tbl closes its own shunt circuit, terminating on the grounded springs of the TRS test socket, and at the same time short-circuits the upper coil of the TA relay, and at the anchor, tb6 switches off the lower coil of this relay, as a result of which the relay releases. Tbl and tb3 earthing via conductors 31 and 32 running to separate and common alarm circuits (not shown in detail as these circuits may be of any known type) on the anchors tb4 and tb5 (Fig. -3) breaks the circuit of the common relays YA and ZA, corresponding to the common and overflow group of finders, as a result of which these relays are demagnetized, and the brushes 2a and 3a are connected to the ground in order to keep the wrong locator busy in the event that the switchboard is connected repeatedly with other switchgear. Relays YA and ZA, release, activate, as has already been said, the respective transmitters YB and ZB, the anchors of which are combined so that they switch the starting guide from group A of the finders, so that all calls in the group A will be interlocked by the connectors found in group B. The circuit layouts are thus constructed so that in the event of a failure in group B, the reconnection is mentioned, so that further calls in group B are completed ¬ ted through group A of seeker switches. Now, when examining the disconnection of the front circuits, it can be seen that the finder trigger electromagnet is controlled by the appropriate selector circuit. In order to reduce the number of wires connecting the selectors to the finders in the present circuitry, the tripping solenoid is actuated in a common circuit from the common control relay unit when the unit is in its normal position. The triggering circuit has the following course: ground, resting anchors sf2 and sf3 connected in parallel, common conductor 22, springs activated N3, resting anchors h3 and hb3, release solenoid coil ZM and to the battery. The trip electromagnet energizes and moves the shaft and the brushes to the normal position, causing the springs N3 to open to shut off the solenoid circuit. During the return movement of the spring, the release electromagnet of the mll remains open in order to disconnect the free marker battery connected via a resistor 1YA. This prevents the selection of this connector, that is, until the connector reaches its normal position. Each group is also provided with RTA and RTB test sockets to allow the finders to be tested without having to insert them again. in a searching motion, while the test socket springs are open, the ground is connected via a resistor to the starting conductor in order to activate the starting relay ST. Since the vertical multiple contact series has not been properly delimited, the finders are now looking at the tenth contact level having a constant earth potential as shown in the figure. The brushes then switch on and rotate automatically to the eleventh position, in which the brush trying to P meets the contact, connected to the battery through a low-resistance resistor, which causes the relay switching HA to be energized and the already described operation is effective. the line devices of the eleventh unit are not connected with each other by wires, so that the line and tripping relays of the chooser are inoperative, while the relay HA trips due to the absence of a shunt circuit. It should be noted that at this time the brushes of the distribution link have been shifted onto the stepped series contact, so that when the starter relays operate, the next finder will be triggered. The described cycle of operations is repeated without interruption until the springs of the test socket are opened. Fig. 7 gives an example of the application of the subject matter of the invention in a satellite exchange to reduce the number of DSR repeaters needed in recognition selectors, which are known to are relatively expensive switches. For this purpose, usually RF finders are combined with RS ordinary selectors, OF overflow finders combined with a common group of CS selectors, with the help of SNF secondary finders and their respective SCD secondary distributors. main switchboard are supplemented in the usual way via OLS outgoing lines, while local calls are completed via DSR repeater brushes, scout selectors, local S selectors and C local connectors.

Claims (4)

1. Patent claims. 1. A telephone device comprising a number of groups of seeking couplers, each group of which usually has seeker and overflow seekers, characterized by the fact that seeker couplers are usually linked directly to the corresponding line firsts. and the seeker overflow switches share access to a common group of first number switches through non-numbered secondary switches. 2. Telephone device according to claim 1, characterized by the fact that it comprises a seeker group, usually having a seeker group directly connected to the corresponding number 1s, and an overflow seeker which may only be used when all the usual seekers in the groups are busy, and may be linked to the first free number dials through free non-numeric links. 3. Telephone device according to claim 1 - 2, characterized by the fact that it contains a number of groups of seeking links taken for use in such order as the seeking link; used first are linked directly to the corresponding first number links, and the seeking links used last may be linked to the first free number links via nonnumeric links. 4. A telephone device according to claim 1 - 3, containing a certain number of starting groups of connecting links, characterized by the fact that some connecting links searching in each group are available for secondary seeking links, divided into as many groups, by connecting between two groups of connecting links looking for, are made so that different starting couplings looking in one group are available for secondary couplers looking in different groups. 5. Telephone device according to claim 1-4, containing a number of groups of finders, characterized by the fact that the finders of each group are divided into two classes, of which second class finders may only be used when first class finders in all groups of finders are occupied. 6. A telephone device according to claim 1 - 3, characterized by the fact that the non-numeric characters are seeking characters. 7. Telephone device according to claim 1, 2 - 4, characterized by the fact that the individual groups of searching switches are connected in pairs, since the search elements of each group normally serve the corresponding line group, however under conditions of high load, that is, when this group is constantly busy serving a different line group. 8. Telephone device according to claim 1 - 7, characterized by the fact that the starter finders cooperate sequentially with the rotary coupler having access to ordinary seeker couplers and overflow seeker couplers, whereby the latter are only used when all the usual seeker couplers are occupied. 9. A telephone device according to claim 8, characterized in that the test leads of common search couplers are connected to one series of contacts of the rotary coupler, while the test leads of overflow search couplings are connected to the second series of contacts of the rotary coupler, the apparatus has a relay which, It works when all the usual seeking switches are in use for the purpose of switching the trial circuit of the rotary switch from the first brush to the second. 10. A telephone device according to claim 9. A method according to claim 9, characterized in that the second brush is a brush by which pulses are sent back to the common breaking relay via the driving solenoids of the seeker. 11. A telephone device according to claim 4, characterized in that the initial seeking switchboards are unidirectional switchgear. 12. Telephone device according to claim 8, characterized in that when a developing line is found, a relay is activated, connected in the circuit of the marker and in the circuit containing the brush seeking the seeking connecting link; Hence, this relay closes the circuit of the switching relay of the seeking switchgear through the marker brush. i3. Telephone device according to claim 1, 2 and 5, characterized by the fact that the seeker couplings are double-motion couplers, grips. are used as an indirect twelm! a designator containing a control device which controls, through a single conductor, the initial movement of the switch in use, and successively controlling the operation of the switch for switching on said switch. 14. A telephone device according to claim 1, 2, 3 or 5, characterized in that the seeker switches are actuated by a pointer, which includes a control device that engages the brush of the pointer to actuate the non-numerical secondary switch, and then the same bristle in the circuit in order to actuate the electromagnet of the finder. 15. Telephone device according to claim 13 or 14, characterized by the fact that the contacts, actuated by the mechanism of the finder switch, serve to activate the switching relay of the switchgear and the electromagnet driving these contacts. Automatic Electric Company Limited. 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