DE657478C - Circuit arrangement for manually operated teleprinter switching devices with query operation - Google Patents

Description

REICHS

NTAMT

In the case of manually operated teleprinter exchanges, efforts are made after as far as possible simplification of operation, the switching on and off of the Interrogator in inevitable dependence on the connection establishment necessary switching measures brought. The arrangement is made so that in each case the insertion of a plug, in particular So when a call comes in, plugging in the interrogation plug, switching on the engine of the interrogation machine and so on inserting the second plug, normally inserting the connecting plug, switching the motor off again or switching the interrogation device to Inevitably leads to read-along operation.

As far as the clearance! of the incoming call is against this In terms of operation, there is nothing wrong with it, because with an incoming call, the It is guaranteed that the subscriber station sending the call or in the case of trunk lines the calling exchange is operational. It is different, however, with an outgoing call, namely both in the case of an independent call originating from the exchange as also in the normal case of switching through a connection by inserting the connecting plug. In both cases, the previous one takes place Switching mode of switching on the query machine or switching it off again or switch to recording mode immediately depending on the plugging in of the relevant plug, also regardless of whether in the switching center called here or subscriber station the call arrives correctly and operational readiness is established or not. Namely at high quality (trunk connection lines) the uncertainty caused by this is very high disruptive and dangerous for the operation, and it can happen that the participant, for which the connection is established in the event of a malfunction of the opposite exchange or of those in between Connecting parts is unfairly charged with fees. When using record-keeping switches to take advantage of the Query machines as note-taking devices is indeed the possibility of a control of the Operability given, but it always depends on the use of the service officer whether it has the opportunity to monitor a connection for a while immediately after it has been established and by receiving the transmitted messages or by asking questions, the operability control in both directions.

According to the invention, these shortcomings are eliminated in that the automatic switching the engine of the query engine

*) The patent seeker specifies as the inventor:

Gunnar Wiegand in Berlin-Wilmersdorf.

with an outgoing call and the automatic switch-off of the motor or the switchover the interrogator on record mode with continuous connections from Switching means is dependent, which only when the incoming call confirming the outgoing call Return pulse come into effect.

It is already known that the return impulse to

Triggering of other switching processes in

ίο to use telex systems.

However, the invention makes it possible to switch on the motor as well as its deactivation and switching to make the recording mode dependent on the connection switching means that the possibility of errors is significantly reduced.

As an embodiment of the invention, the circuit of a pair of cords is shown in the drawing reproduced, which for the query operation with a teletypewriter normal execution can be connected. On the reproduction of switching devices that share the query machine enable you to take notes during an existing connection has been added to the Waived interest in the simplest possible representation of the subject matter of the invention, since the switching measures and switching means required for this are derived from the switching on and off of the interrogation machine Said self-evident for the expert.

In addition to the pair of cords themselves, which is symmetrical and whose plugs are labeled S ₁ and S ₂ , two jack connections K ₁ and K _{2 have been shown} , which can belong to lines of any type. For example, subscriber lines can be connected that lead directly from the exchange to a subscriber station, or exchange lines that enable a connection to be switched through to another exchange. These lines can be operated in any way, while within the switching circuits it is advisable to use a uniform operating mode throughout, e.g. B., as shown, the usual four-wire double-current operation with only two-wire through-connection is used.

For the sake of explanation it is initially assumed that a call, for example from a subscriber station, arrives via the line connected to the jack K _1. Here, the contact er _{x of} the receiving relay, not shown, is moved from the character position assumed in the idle state (the so-called incorrect idle position) to the separating position. As a result, the usual, therefore not shown to simplify the circuit diagram, the call devices are operated in a known manner, which the operator of the. Arrange switching center to insert the interrogation 'plug S ₁ into the latch K ₁ . _; ; _ _: - _; Since as a result of the Z ^ Vein in jack • "" • ÜeV position corresponding to the contact he _± positive battery voltage + B and negative at the end connected to the & ₃ Vein of the plug relay VA battery voltage - B is, now speaks the relay VA on. On the one hand, a holding circuit for the relay VA is prepared via the double make contact Va ₁ and, on the other hand, a compensating resistor W _{1 is connected} to balance the load on the telegraph circuit in question. The contact Wd ₂ switches the circuit of the test wire c _s , so that the relay CA responds in the cord and the relay ₁ in the latch, which shortly before received a first excitation via the tail lamp SL _{1, remains attracted.}

The relay T ₁ opens the contact t _t and thus switches off the negative potential from the winding of the transmitter relay SR ₁ , which is necessary in the idle state to maintain the false idle position. At the same time, the positive potential of the battery _{can now come into effect via the a s} -wire of the cord and the rest contacts C & 4 and from _{2 onwards, ie the ReIaIS 1} S ¹ Ji ₁ is moved from the wrong rest position to the separating layer. This transfer means sending a return pulse to the calling station to confirm the correct arrival of the call it has transmitted.

The relay CA closes a holding circuit through the contact Ca ₁ , which makes the state of excitation independent of the position of the contact Va ₂ and which comes into effect later when the connection is disconnected. The contact ca ₂ closes the local occupancy circuit in which on the one hand the relay AB assigned to the cord and on the other hand the relay E assigned to the interrogation machine are located. The relay AB is designed in a known manner as a test relay by using two different-resistance windings in order to prevent a simultaneous connection of several pairs of cords to one and the same interrogation device. When the interrogation device is free, the interrogation relay AB can respond to the cord used, whereby it short-circuits the high-resistance winding II through the contact Ob _{1 in order to achieve the aforementioned blocking.} The contacts from ₂ and from _& are shifted in order to connect the contact ms of the co-transmission relay MS and the winding ME of the record-receiving relay to the relevant cores of the cord pair

switch. The opening of the contacts from ^ and from ₅ prevents the wires from being switched through within the cord during the interrogation state.

When the relay CA responded , in addition to the contacts Ca ₁ and ca ₂ already mentioned, the other contacts were also switched. Of these, the contact prepares approx. _{3 for} the subsequent connection, during the

ίο Contact ca ₄ via the still closed contact cb _s the positive potential necessary for the next call, regardless of any actuation of the forwarding contact ms, to which a ₄ ~ wire of the connecting _{plug, S 2} connects. Contact ca _s is opened in order to prevent the connection of a fixed potential to the a ₃ wires of the interrogation plug later when the contact cbi is moved. The contact ca _s prepares the

ao final signaling by preparing a later permanent dropping of the relay VA held during the connection through its opening.

As mentioned, the relay E assigned to the interrogation device also responded at the same time as the relay AB . The contact e _x is opened and thus eliminates the short circuit of the transmitting contacts SK and the receiving magnet EM, which exists in the idle state for safety reasons. The contacts e ₂ and e _s switch the drive motor M of the interrogation machine to the network N ₁ so that the machine starts up. The query operation can now proceed, with the characters coming from the subscriber being recorded by the relay ME and transmitted to the receiving magnet EM through its contact me , while in the opposite direction the relay MS is generated by the sending contact SK by means of its contact ms Passes on impulse combinations to the participant.

When the subscriber's request regarding the establishment of a specific connection is accepted, the connection plug S _{2 is} inserted into the jack of the line in question, for example the jack K _s. In the test circuit, only the relay T _{2 located in the c 2} wire of the pawl is activated, while the relay CB located _{in the c 4} wire of the connecting plug remains energized, in contrast to the usual mode of operation. Through the contact ίο of the relay T _{2 , the negative potential lying on the a 2} wire of the pawl in the idle state is separated, so that now the transmission relay SR _S is from the wrong idle position in accordance with the positive potential lying on the a _{4 wire of the connecting plug} the separating layer is reversed.

The call to the connected subscriber station or switching center continues through the contact of relay SR _{2 (not shown).} In this the known switching processes then take place, which send out a confirmation pulse in the rearward direction when ready for operation. If it is an exchange with voter operation or a subscriber station, the return pulse is sent out automatically in the case of operational readiness, whereas in the case of a manually operated exchange, as indicated above, it is only triggered when the operator enters.

In the exchange from which the call originated, the incoming return pulse causes the receiving relay, not shown, to be reversed and thus the switch of contact er ₂ to the separating position. Only now does the relay VB _{on the & 4} wire of the connecting plug S ₂ respond, while it was previously due to the mutual. Connection to the negative potential of the battery was de-energized.

The excitation of the relay VB has, similar to that of the relay VA before when interrogating, the closure of its own holding circuit by the contact Vb ₁ and the switching on of the relay CB by the contact vb ₂ . This relay now prepares its own holding circuit again via contact cb _x. The contact cb ₂ interrupts the local occupancy circuit of the interrogator, so that the relays AB and E drop out.

When the relay E drops out , the motor M of the interrogation machine is switched off again and the machine is therefore stopped. This allows the operator to clearly see that the return pulse has arrived properly and that the connection line leading to the called station is operational in both directions as well as for the receiving and transmitting devices of that station itself.

If the relay AB drops out, no resetting of the contacts from ₂ and from _s disconnects the send and receive lines of the recorder from the cord. The contacts from ₄ and from ₅ cause the final connection of the traffic arteries within the cord, which was prepared beforehand by relocating the contacts approx. ₃ when interrogating and cb _% when the return pulse arrives. The purpose of the contacts cbi, cb ₅ , cb _B is the same as that of the above-mentioned similar contacts of the relay CA.

If one of the participants, e.g. If, for example, the end signal lying on the jack K ₁ , due to a longer ^J character current pulse, the relay VA drops out, which was not influenced by the short-term current changes during the character transmission due to its delay. It then remains permanently off, since the own contact Va ₁ finally interrupts the previously existing holding circuit and the contact ca _B remains open until the plug is pulled. The contact va% switches on the tail lamp .SX ₁ , but does not affect the relay CA _{held by its own contact Ca 1.} In the same way, the tail lamp SL ₂ also appears on the other side when a tail signal pulse arrives via the pawl K _2. Then the connection is finally broken again by pulling the plug, whereby the rest state of all contacts shown in the drawing is brought about by de-energizing the relays T ₁ , CA, CB and T _2.

Above, the case of a continuous connection was considered, in which the invention only has an effect with regard to the deactivation of the interrogation machine (or, in the presence of record-keeping switches, possibly in switching the interrogation device to record-keeping operation). However, it is also often the case that an independent call is initiated from the office. In this case, the importance of the invention lies in the fact that the interrogation machine is not switched on immediately when the plug is inserted, as before, but only when the return pulse that confirms the call arrives. This process will also be explained using the example shown in the drawing. It is assumed that the operator of the office wants to call the exchange or subscriber station connected to the jack K _{1 on his own initiative.} Upon insertion of the plug S _1, the in-c _x Vein the latch relay T, as previously energized _1, so that by the contact of J _1, for ensuring the incorrect neutral position of the transmission relay SR ₁ necessary negative potential of the C ₁ -Ader is disconnected. The relay SR ₁ is thus again reversed in the separating layer, since it c from a _s Vein of the cord on the closed contacts is & ₄ are fed and from ₂ positive potential .: On the other hand, the relay can VA, which with the & ₃ Vein of Cord is connected, in contrast to the case considered above, the query of an incoming call does not respond, since the receiving relay contact he _{t is} still on the negative pole of the battery. The relays CA, AB and E also remain temporarily unexcited, while the tail lamp SL ₁ , which is only momentarily excited during interrogation, remains switched on for the time being.

When the return pulse arrives, however, the contact er _{± is moved} from the wrong rest position to the separating position. Only now can the relay VA respond and switch on the other relays CA, AB and E , which in turn results in the connection and commissioning of the interrogation device in the manner already described above. In this case too, when the interrogation machine starts up, the operator has a perfect indicator that the connection initiated independently by him is operational in both directions.

Claims (3)

Claims: so i. Circuit arrangement for manually operated teleprinter switching devices with interrogation operation, in which, depending on the connection setup, the respective corresponding operating state of the interrogation device is inevitably established, characterized in that the automatic switching on of the motor (M) of the interrogation machine in the event of an outgoing call and the automatic disconnection go direction of the motor or the switchover of the interrogator to recording mode in the case of continuous connections is dependent on switching means (VA ₁ CA, VB ₁ CB) , which only come into effect when the return pulse confirming the outgoing call arrives. 2. Circuit arrangement according to claim i, characterized in that relays (CA ₁ CB) in the test circuit, whose contacts (ca ₂ , el · «) control the occupancy circuit (AB ₁ E) of the interrogator, connected to the telegraphing circuits through relays (VA, VB) that can be influenced by the return pulse. 3. A circuit arrangement according to claim 2, characterized in that in the circuit of the relay (CA ₁ CB) controlling the occupancy circuit of the interrogation device, a separate contact (Ca ₁ or Cb ₁ ) of the relay (CA or CB) and a contact in parallel (va ₂ or vb ₂ ) of the relays (VA or VB) controlled by the telegraphic circuits as a function of the return pulse. 1 sheet of drawings