DE1062755B - Circuit arrangement for relay crossbar switch - Google Patents

Description

There are circuit arrangements for multi-core subscriber switching in telephone exchanges known for cross-switch panels that have a relay with several at the intersection of two coordinates Have contact spring sets that can be operated at the same time. The relay winding is in these circuit arrangements each relay via a blocking rectifier cell with the input contacts of the horizontal panel axis one coordinate and with the output contacts of the vertical panel axis of the other Coordinate connected. The blocking rectifier cells serve to decouple the fault current from neighboring ones Relay. These arrangements require a relay with z. B. four contact spring sets with eight contact springs each and one blocking rectifier cell each. The use of blocking rectifier cells made of selenium limits the size of such cross-switch panels, since the leakage currents caused by reverse currents each blocking rectifier cell can be so high that the parallel connection of several Re-Iais can lead to errors.

By using reed relays with multiple contacts in conjunction with gas diodes as Blocking cells can create such cross-field circuits with a reduction in false and leakage current losses be improved so that cross-switch panels of any size can be formed, however, such arrangements are very expensive and require more space.

Further cross-switch field circuits for switching devices known under the designation coupling field in telephone systems need in each z. B. 5-part coupling relay per subscriber line a selenium rectifier blocking cell, an excitation winding and a holding winding per magnet.

The invention aims to reduce the cost of relay windings, blocking rectifier cells and soldering points of the known arrangements without reducing the number of contact spring sets. This is achieved by the invention in that, in a circuit arrangement for the optional switching through of coordinate-wise arranged input and output lines in telecommunication, in particular telephone systems with several relay switches arranged in a cross-switch panel, one of the subscriber contact spring sets arranged in groups each has a desired contact spring set depending on the position of one with one Step by setting magnets in one of its end positions movable and provided for all groups of a relay switch jointly, the setting member is individually actuated by the pressure magnet assigned to its group, the pressure magnets and the setting magnets of all relay switches are located in individual marking circuit branches that are decoupled from each other and on a circuit arrangement
for relay crossbar switch

Applicant:
Telephony and signal construction
Lehner & Co. KG,
Essen-Kupferdreh

Max Amann, Stuttgart-Bad Cannstatt,
and Carl Ludwig Lehner, Essen-Heisingen,
have been named as inventors

End for each relay switch to a relay switch marking contact assigned to it of the one Coordinate are connected and at the other end in such a way to input marker contacts of the other coordinate are connected that each contact of a subgroup of these contacts is only assigned to it and turns on each marked pressure magnet alone, while each contact of the other subgroup this contact switches on the setting magnet assigned to it and, at the same time, the delayed switch-on of the assigned pressure magnet prepared.

By dividing the circuits for the pressure magnets and the switching magnets into two Switching groups, with only one pressure magnet in the first switching group - on the other hand in the In the second switching group, the prepared switching solenoid is actuated first and then the one actuated afterwards Pressure magnet jointly - ■ for contact spring selection and switching through to effect comes, the invention enables significant savings in acquisition costs, size and weight the cross switch panel arrangement; also the maintenance costs with the arrangement according to the invention lowered. According to a further invention, the blocking rectifier cells for decoupling fault current are connected in such a way that that the current flow preferably from the subgroup input contacts via the pressing or; Changeover magnets only in one direction via the relay switch marker contacts assigned to the output coordinates is possible. Only the subgroup of input contacts that have the changeover magnet must be used and pressure magnets is common, a special set of blocking rectifier cells and only can be assigned in the first relay switch. Through this

909 580/78

Measures for the other relay switches serving the same purpose blocking rectifier cells are superfluous.

The chronological order of the response, first the changeover magnets and then the pressure magnets, is due to the design of the pressure magnets with pull-in delay means, such as and parallel resistances to the exciter windings or through copper damping on the windings ensured. In another embodiment of the invention, the relay switches are particularly advantageous for this purpose changeover contact spring sets, so that by the changeover element or the changeover magnet first a changeover contact spring set is actuated, which then inevitably only uses its pressure magnets let through. The delay means mentioned are omitted.

According to the invention, the switching magnet of each relay switch is used for further decoupling of faults via only one blocking rectifier cell to the axis line assigned to the output coordinate connected.

According to a further feature of the invention is located in the supply line in front of the relay switch marker contacts a common current weakening resistor to save electricity, which after completed Contact through-connection of a relay switch through a contact of an occupancy relay, not shown is switched on.

The crossover panel of the circuit arrangement according to the invention is considerably simpler, cheaper and is to maintain with low running costs.

In four circuit diagrams are some embodiments of the invention on a relay cross switch panel shown for ten or twelve input coordinates and ten output coordinates each. It shows

Fig. 1 a shows a circuit arrangement with three relay switches, in which the switching element from a Rest position is only adjusted to one end position, with electrical delay means that switch over the vector groups determine,

Fig. 1 b is a diagram for a relay switch according to Fig. 1 a,

Fig. 1 c shows an arrangement of the pull-in delay resistors for Fig. La,

Fig. 2 shows a circuit arrangement with three relay switches, in which the switching element as in Fig. 1 a is adjusted from a rest position only in one direction of movement and in which a changeover contact spring set determines the vector group switchover,

Fig. 3a shows a circuit arrangement with three relay switches, in which the switching element from a middle rest position is adjusted to one of two end positions and in which, as in Fig. 1 a, electrical delay means determine the vector group switchover,

Fig. 3 b is a diagram for a relay switch of Fig. 3 a,

Fig. 4 shows a circuit arrangement with three relay switches, in which the switching element as in Fig. 3a is moved from a central rest position into one of two end positions and in which as in Fig. 2 a changeover contact spring set determines the switching group changeover.

The circuit arrangement shown in Fig. 1 a for a relay cross switch panel uses ten relay switches with ten sets of contact springs each for ten subscriber connections. Each relay switch has five Pressure magnets II to Vl etc. to IO to VO and

a switching element that can be adjusted from a lateral rest position to a lateral end position by a switching magnet Ul to UO. The magnets are arranged in two switching groups so that in the first switching group of the odd subscriber numbers only the pressure magnets alkine and in the second switching group of the even subscriber numbers a prepared switching magnet is always operated first and then operated with one

ίο The pressure magnet jointly determines and connects the contact spring set of a participant. In this case, in the illustrated cross panel are all Andrückmagnete Il to Vl, etc. to IO to L via blocking rectifier cells 6 "11, S31, 5 * 51, 571 and 591 to SIO ₁ S 30, S 50, S 70 and S 90 to the horizontal axis lines L of all decades connected. The axis lines L end at the input contacts El, ES, E5, E7 and E9 of marker relays of the odd subscriber connections. In addition, the pressure magnets1 1 to Vl etc. to IO to VO of each output coordinate Zl to ZO are connected to a vertical axis linewl to mO connected, to the RelaisschaltermarkierkontakteZl to ZO performs the Markierrelais. Only in the first relay switch, the vertical connecting lines are connected k of the horizontal AchsenleitungenL which lead to the input contacts E2, E4c, D6, E8 and £ 0 Markierrelais the straight subscriber lines. at each vertical axis linewl to raO is connected to one of the reversing magnets Ul to UO via one of the blocking rectifier cells SU1 to SUO . A common line Lu of all the magnets U common to all input coordinates leads via the blocking rectifier cells S2, Si, S6, S8 and SO to the input contacts of the even subscriber connections.

The relay switch marker contacts Z1 to ZO are connected to the horizontal multiple line L 6 via a current weakening resistor Rv and connected to the positive potential of a current source. All input contacts E 1 to E 0 are connected to a multiple line η and applied to the minus potential. The blocking rectifier cells S 11, 5 * 31, 6 * 51, 5 * 71 and 5 * 91 to 5 * 10, .930, 6 * 50, 6 * 70 and S 90 are used to decouple fault current from all pressure magnets 1 1 to V 1 etc. to IO to VO. The blocking rectifier cells SUl to SUO serve to decouple fault current from all switching magnets Ul to UO. The barrier rectifier cells S2 ', S 4', 6 * 6 ', 5 * 8' and SO 'serve the fail current decoupling of all parallel connected input contacts E1 k via connecting lines to E 0. The current shunt resistor Rv is in setting of the relay switch through a normally closed contact b 2 short-circuited and is opened after the switch has been occupied by an occupancy relay B ( not shown), whereby the holding current for a marked switchover or pressure magnet is reduced to save power.

In Fig. Ib the diagram of a relay switch for the switching magnets U and the pressing magnets 1 1 to V 1 etc. to 1 0 to V 0 of the subscriber connections E No. 1 to 0 is shown. The points in it indicate which of the magnets is excited for a participant.

In FIG. 1 c, the example of a pull-in delay for each of the pressure magnets, eg 19, through a parallel resistor Rb and through a common series resistor Ra assigned to the connecting line k of an axis line L is shown.

The following examples illustrate how contact spring set selection and switching work

explained for an even and odd subscriber connection:

Is z. B. the participant is marked, the first free relay switch is marked by a marker relay, not shown, ie the contact Z1 closed and thus positive potential preparatory to the vertical axis line m 1 of all pressure magnets 11 to V1 and to the switching magnet U 1 of the first relay switch placed:

+. > Lz, ZI,.

b2 Sul, ul

Furthermore, the input contact E 5 is closed by a marker relay (not shown), which thus switches on the minus potential:

+, -, Lz, Z1, III 1, S 51, E 5, n, -. b2

According to the diagram Fig. Ib is under the U-No. 5 only to operate the pressing magnet III 1. In the last The current flow described is energized the pressing magnet IIIl, which is the contact spring set for the subscriber line 5 switched through in the first relay switch (Z1).

Is z. B. the subscriber 2 is marked and the relay switch 9 is free, the contact Z 9 is closed by a marker relay (not shown) and thus positive potential preparatory to the vertical axis line m 9 of all pressure magnets 19 to V 9 and to the switching magnet U 9 of the ninth relay switch placed:

+,, Lz, Z 9, m 9,

b2

19 - V9, L, k, S2 '

SU 9, U9, LU, _S2

(Fig. La).

Furthermore, the input contact E2 is closed by a marker relay, which thus switches on the minus potential:

λ. ^Rv τ 7D ο ^SU9 > V9.LU.S2

+, -, Lz, Z9, m9,, E2, n, -.

b2 I9, S19, L, K, S2 '

According to diagram Fig. 1 b are under E-Nt. 2 to operate the switchover magnet U and the pressure magnet I. Both magnets are excited in the current flow described last. The switchover magnet U9 responds first and adjusts its switchover element so that a selector switch is under the contact spring set for subscriber connection 2 in the ninth relay switch. Only then does the pressure magnet 19, which is delayed due to the copper damping or due to the parallel resistance Rb (FIG. 1 c), attract its armature and switch the contact spring set for the subscriber connection 2 through.

Of course, the circuit arrangement according to the invention can also be designed as a 100-part, decadic relay cross-switch panel and used to connect one of 10-10 = 100 lines (subscriber lines or the like with two-digit numbers 1.1 to 0.0) with the aid of their individually assigned and by the pressure magnet , if necessary with the assistance of the switching magnet, to mark actuatable contact spring sets, to switch them through or to alternately connect them to a single line of a different type. In this application, the contacts El to EO previously referred to as input contacts act as marking contacts z. B. for the digits of the units of the lines and the so-called relay scarf termarkierkontakte Z1 to ZO accordingly as marking contacts for the digits of the tens of the lines concerned, etc.

The circuit arrangement shown in Fig. 2 differs from that of Fig. 1 a by the use of a changeover contact spring set u 1 to itO in the relay switches. Each changeover contact spring set causes an inevitable pull-in delay for the pressure magnets 11 to Vl to 10 to VO of each relay switch, provided that one of the contacts £ 2, £ 4, £ 6, £ 8 and £ 0 of the second switching group assigned to the even subscriber numbers is activated. The pressure magnets 11 to Vl to 10 to VO then have no special means of pull-in delay, such as. B. Parallel and series resistors or copper attenuation. The inevitable time sequence, according to which one of the switching magnets Ul to UO must respond before a pressure magnet can be excited, is achieved in that the switching magnet closes its switching contact spring set u 1 to u0 when it is actuated and only then all of the pressure magnets II to Vl to 10 until VO switches on to the input contacts. By introducing the changeover contact spring sets u 1 to u0, the blocking rectifier cells are omitted in the vertical connecting lines k , since the vertical connecting lines k are separated by the non-closed changeover contact spring sets u 1 to u 0. The vertical connecting lines k of all relay switches are connected in parallel to common horizontal connecting lines 0. The other design of the circuit arrangement is the same as that of FIG. 1 a, and the same diagram of FIG. 1 b, which shows the mode of operation, also applies.

This is explained using two examples below for an even and an odd subscriber line.

Is z. B. the subscriber 19 is marked, the »Zener contact Z1 is closed by a marker relay (not shown) and thus positive potential is applied in preparation to the vertical axis line m 1 of all pressure magnets 11 to V1 and to the switching magnet Ul of the first relay switch:

• VI

_1_ ^rv t 71 H-

+, -, Lz, ZI,

b2 SU1, U1

In addition, the "one" contact E 9 is closed, which thus switches on the minus potential:

+, -, Lz _l Zl, VI, S91, E9, n, -. b2

The changeover relay Ul cannot be energized because the changeover contact spring set u 1 is open. According to the diagram Fig. 1 b is under the £ no. 9 only the pressure magnet Vl has been excited, which switches through the contact spring set of the subscriber connection 19 in the first relay switch.

Is z. If, for example, subscriber 06 is marked, the "tens" contact ZO is closed and, in preparation, plus potential is applied to the vertical axis line m0 of all pressure magnets 10 to VO and to the changeover magnet UO of the tenth relay switch:

Rv

+,, Lz, ZO.mO,

b2

10 -VO

SUO ₁ UO, LU

In addition, the "one" contact £ 6 is closed, which thus switches on the minus potential:

+, -, Lz, Z0, m0, Eo, A ₁ -.

b2 IIIO ₁ S50, L, K, UO

The changeover relay was thus energized in the first switching stage and its changeover contact spring set u0 closed, with its changeover element also being adjusted so that an elastic selector finger is under the contact spring set for subscriber connection 6 in the tenth decade, i.e. in the tenth relay switch. The contact spring set for subscriber line 06 is switched through in the tenth relay switch, as shown in the diagram in FIG. 1b under the £ no. 6 can be seen.

In Fig. 3a, the circuit arrangement for a non-decade relay cross switch panel is shown, which consists of ten relay switches, each with twelve contact spring sets for 120 subscriber connections. The relay switches each have four pressure magnets, each of which is able to operate one of three sets of contact springs, as well as a switching element that can be moved from a central rest position under the influence of two switching magnets Ul, Ul ' to UO, UO ^r into one of two end positions can. The circuit arrangement of all magnets is made in three switching groups so that in the first switching group only one of the pressure magnets 11 to IV1 to 10 to IVO alone and in the two other switching groups, on the other hand, always first actuates a prepared switchover magnet Ul, Ul ' to UO, UO' the contact spring set of a participant is determined and switched through together with a subsequently actuated pressure magnet. In the cross-switch field shown, all pressure magnets 11 to IV1 to 10 to IVO are connected to the horizontal axis lines L of all relay switches via blocking rectifier cells 521, S51, S 81 and 5011, etc. to 520, 550, 580, 5010. The multiple lines L of the first switching group end directly at the "one" contacts E2, E5, EB and £ 01 of the marker relays. In addition, the pressure magnets 11 to IVl to 10 to IVO of each relay switch Zl to ZO are connected to a vertical axis line wil to m0 , which leads to the "Zehner" contacts Zl to ZO.

Only in the first relay switch are the vertical connecting lines k connected to the horizontal axis lines L , which lead to the "one" contacts £ 1, £ 3, £ 4, £ 6, £ 7, £ 9, £ 0 and £ 02. A pair of switching magnets U1, Ul ' etc. to UO, UO' is connected to each vertical axis line m 1 to m0 of each relay switch via a blocking rectifier cell SU1 to SU 0 , and vertical axis lines m 1, ml ' assigned to them are connected to their other winding connections. etc. to m0, m0 'are connected via the blocking rectifier cells 51, 53, 54, 56; 57, 59 and 50, 502 are connected to the "one" contacts of the two other switching groups. All switching magnets Ul, Ul ' to L'O, t / 0' are connected in parallel ^{to the corresponding multiple lines LL 7} I and LU 2. The further development of this circuit arrangement is similar to that in FIG. 1 a.

The diagram in Fig. 3b is similar to that of Fig. Ib with the difference that two switching magnets U1, Ul ' to UO, UO' with {/ ..., L ^r .. / and four pressure magnets 11th to IVl to 10th to IVQ with I ... to IV. . . are shown.

In the circuit arrangement according to FIG. 3a, parallel resistors Rb and a common series resistor Ra according to FIG. 1c are used for the pull-in delay of the pressure magnets 11 to IV1 to 10 to IVO.

The mode of operation is explained using two examples as follows:

Is z. B. the subscriber 12 is marked, the "Zehner" contact Zl is closed in a suitable manner and thus positive potential is applied in preparation to the vertical axis line m 1 of all pressure magnets 11 to IV1 and to the switching magnets U1 and UI ^{r of} the first relay switch:

+ ,, Lz, Zl _{1 Il-}

b2

-IVl _j SU1,

Ul Ul ''

In addition, the "one" contact £ 2 is closed, which thus switches on the minus potential:

Rv

+,, Lz, Zl ₁ Il ₁ S21, L, E2, n, -.

b2

In the diagram of Fig. 3 b is under the £ no. 2 as the pressure magnet 11 is actuated. So there is only the pressure magnet 11 has been excited, the contact spring set for the subscriber line 12 in the first relay switch switches through.

Is z. If, for example, subscriber 902 is marked, the "Zehner" contact Z9 is closed and, in preparation, plus potential is applied to the vertical axis line m 9 of all pressure magnets 19 to IV 9 and to the switching magnets U 9 ' and U 9 of the ninth relay switch:

₊ , ^, Lz, Z9, I9-IV9, SU9 ^{ü9 " m9 " LU2} . b2 U9, m9, LU2

In addition, the "one" contact £ 02 is closed, which then switches on the minus potential:

₊ , ^, Lz _lZ 9, _m 9, E ^ n, -. b2 lY9, S019, L, k, S02

In the diagram of Fig. 3 b are under the £ no. 02 the switchover magnet U 9 ' and the pressing magnet IV 9 are actuated. The switching magnet U 9 ' in the ninth relay switch is excited in the first switching stage, which moves its switching element from a central rest position to a right end position so that its selector finger is under the contact spring set for subscriber connection 02 in the ninth relay switch and delays it in the second switching stage responsive pressing magnet IV 9 is actuated, which switches through the contact spring set for the subscriber line 902.

In Fig. 4, the modified circuit arrangement of Fig. 3a can be seen, which is characterized by the use of a changeover contact spring set ul to «0 in each relay switch. Each changeover contact spring set causes an inevitable pull-in delay for the pressure magnets 11 to IV1 etc. to 15 to VO of each relay switch when any one of the "one" contacts E 1, £ 3 is actuated; £ 4, £ 6; £ 7, £ 9 and £ 0, £ 02 of the two switching groups. The changeover magnets 11 to IVl etc. to 10 to VO have no pick-up delays such as parallel and series resistors or copper damping. The inevitable time sequence that only one of the switching magnets' Ul, Ul ' to UO, UO' of a relay switch respond

Claims (5)

which then closes its switchover contact spring set ul to uQ upwards or downwards when it is actuated and thus only then switches on all the pressure magnets 11 to IVl etc. to IO to VO to the "one" contacts, is caused by the switchover contact spring set later indirectly is only actuated by the selector. For this purpose, the vertical connecting lines k 1 to k0 in each relay switch are connected to the middle contact springs of the switching tekontaktfedersätze u 1 to u0, which are open in the middle rest position of the switching elements. The horizontal multiple lines Lu 1 and Lu2 run over all relay switches and are via the blocking rectifier cells vS-I, 53; 54, 56; 57,59 and 50,502 for the upper and lower contact springs of the changeover contact spring set are only connected in the first relay switch. The other design of the circuit arrangement is the same as that of FIG. 3 a, and the same diagram according to FIG. 3 b, which shows the mode of operation, also applies. The mode of operation is explained as follows using two examples below: If z. If, for example, participant 05 is marked, the "Zehner" contact ZO is closed and, in preparation, plus potential is applied to the vertical axis line mO of all pressure magnets IO to IVO and to the pair of switching magnets UO and UO 'of the tenth relay switch: Rv +, -, Lz, ZO, IQ b2 -IVO, SU0, UO UO '' In addition, the "one" contact £ 5 is closed, which thus switches on the minus potential: Rv +,, Lz, ZO, m0 ', 110, 550, L1E5, n, -. b2 35 The changeover relays UO and UO 'could not be energized because the changeover contact spring set u0 is open. In the diagram of Fig. 3 b is under the £ no. 5 the pressure magnet II 0 is actuated. Thus, only the pressure magnet II 0 has been excited, which switches through the contact spring set for the subscriber connection 05 in the tenth relay switch. Is z. B. the subscriber 14 is marked, the "Zehner" contact Zl is closed and thus plus potential preparatory to the vertical axis line m 1 of all pressure magnets 11 to IV1 and to the switching magnets Ul and Ul 'of the first relay switch Zl: +, -, Lz, ZltIlb2 -IV l.SUl, Ul Ul '' 55 Furthermore, the "one" contact E 4. is closed, which thereby switches on the minus potential:, R ° τ -τ * «χ * SUI1UI1ml, S4 +, -, Lz.Zl.Ml, - -, £ 4, n, -. b2 III, S 51, kl, S4 In the diagram according to FIG. 3 b is under the E no. 4 the switchover magnet U1 and the pressure magnet II 1 are actuated. In the first switching stage, the switching magnet U1 in the first relay switch is excited, which adjusts its switching element in an upward direction so that a selector finger is under the contact spring set for subscriber connection 4 in the first relay switch, and in the second switching stage its delayed-response pressure magnet II 1 actuated, which switches through the contact spring set for the subscriber line 14. Patent claims: 1. Circuit arrangement for the optional switching through of coordinate-wise arranged input and output lines in telecommunication, in particular telephone systems with several relay switches arranged in a cross-switch panel, of which subscriber contact spring sets arranged in groups each have a desired contact spring set depending on the position of one with one step by switching magnets in one of its Movable end positions and jointly provided for all groups of a relay switch switchover member is actuated individually by the pressure magnet assigned to its group, characterized in that the pressure magnets (II to VO) and the changeover magnets (U1 to UO) of all relay switches are in individual marker circuit branches which are decoupled from each other are and are connected at one end together for one relay switch to a relay switch marking contact (ZI to ZO) assigned to this one coordinate and at the other En de are connected to input marking contacts (£ 1 to EO or £ 02) of the other coordinate in such a way that each contact of a subgroup of these contacts (e.g. E.g. £ 5) only switches on the pressure magnet assigned to it and marked in each case (e.g. III 1), while each contact of the other subgroup of these contacts (e.g. £ 6) switches on the switchover magnet assigned to it (e.g. Ul) switches on and at the same time prepares the delayed switch-on of the assigned pressure magnet (e.g. IUI). 2. Circuit arrangement according to claim 1, characterized in that all magnets (I to V, [/ ...) each of a relay switch are permanently connected to an axis line (ml to m0) controlled by one of the relay switch marker contacts and assigned to a corresponding output coordinate, and that one pressure magnet (II to VO) with the same ordinal number of all relay switches is connected with its other connection to a further axis line (L) controlled by at least one of the input marking contacts (£) and assigned to the corresponding input coordinates. 3. Circuit arrangement according to claim 1, characterized in that the input marker contacts (£ 2, E 4 ... £ 0) of the other subgroup also control a line {Lu) common to all input coordinates, to which the switching magnets (U ...) are connected their other terminal of all relay switches are connected (Fig. 1 a, 2). 4. Circuit arrangement according to claim 1 to 3, characterized in that delay devices are provided which are effective when a contact (£ 6) of the other subgroup is actuated and the response of a pressure magnet (II to VO) compared to the response of the associated switching magnet (JJ. ) delay... 5. Circuit arrangement according to claim 4, characterized in that each pressure magnet (11 to VO) wears copper damping and all 909 580/78