DE681877C - Circuit arrangement for teleprinting systems with dialer operation - Google Patents

Description

Circuit arrangement for teleprinter systems with voter operation The main patent relates to a circuit arrangement for teleprinter systems with dialer operation, in which the dialing and telegraphing pulses by pulses of the same type of current, but different durations are transmitted.

As stated in the main patent, incorrect connections can occur in such systems through the telegraph impulses following the false triggering of an existing connection occurrence. According to the main patent, these incorrect connections are prevented by that immediately after the connection has been established, the terminator criterion applicable to the system in question is sent to the calling party. The one assigned to the calling party The circuit contains switching means which, despite the terminating character criterion maintain the established connection.

However, the circuit arrangement according to the main patent is from the cooperation of the subscriber and requires a change in the activation and deactivation usual key arrangement of the subscriber devices.

These disadvantages are avoided according to the invention in that in the Subscriber line a relay chain, which advantageously consists of two delay relays exists, is arranged. According to the invention, the first relay is part of the accept the terminating character criterion sent after the connection has been established and turn itself off, while the delay changes the connection continues to hold. If there is a faulty connection, the first relay is the The chain is no longer on the line, and therefore the connection is made through the now falling second relay disconnected. It will be the change of the participant sets and avoid dependence on the participant's attention.

The inventive concept described above is now based on the following explained in more detail by two application examples.

Fig. R shows a common telegraphic electoral office in a schematic representation with a local subscriber station TS to which the inventive concept described above has been applied accordingly.

If the subscriber presses the call button Rt of his subscriber station TS, so he thereby closes a ringing circuit for the preselector VW in the usual way. This ringing circuit influences the relay via winding I. R, which in turn via the contact r3 to the selection in a known manner Brings start and via the contact r, the relay H (winding I) can respond. The preselector is now looking for a free group selector GW (in Fig. R only hinted at). When checking on the group selector pulls in a known manner the T-relay on. The relays SR, L (winding I) and H (winding II) ---- Telegraph battery (+ -TB) from the group selector, which puts SR on the isolating current side and relay L is made to respond. Relay H, whose winding I through Addressing T by. Opening of the contact t5 was de-energized, persists Winding II continues. The relays SR and L are through the contact 14 from the rear Transmission line (b-core) disconnected and connected directly to + -TB. Relay SR remains therefore lie on the isolating current side, and relay L remains picked up. By responding of relay L the subscriber loop was reversed, so that now the teletypewriter of the calling subscriber is started. By pressing the number switch and thus his. Contact ni is now the further connection in the usual way manufactured, d. H. When you dial the first digit, the group selector changes to the required Decade, in which he was subsequently an unoccupied line voter visits. The choice of the second digit affects the pulse relay A des Line selector through the contact a1 its Rebmagnet H, whereby the line selector is lifted into the chosen decade. Then the changeover relay UR comes through his Winding I in the usual way to respond (the relay C and thus also the contact c2 have been activated when checking the group selector on the line selector). In addition to switching the pulse contact a1 of relay A from the Rebmagneten to the Rotary solenoids of the line selector and others that are not essential to the present invention The relay UR brings switching operations through its contact ur dös relay F to respond, which by means of its contacts f i and f, prepares circuits, which are important for the following processes.

The rotary magnet D of the line selector is influenced by the last series of pulses that now follows by means of the contact a1 of relay A. The line selector is thereby rotated to the subscriber line of the subscriber to be called. Immediately at the beginning of this turning process, the shaft contact turns and connects to the b-wire coming from the group selector GW via the actuated contact f2 + telegraph battery (+ -TB). If the line selector has now reached the contact segments assigned to the subscriber line of the subscriber to be called, the relay P responds via the c wire and the closed contacts c3, ur2 and v1. The a-wire is switched through to the called subscriber via contact p1. Via the addressed contact p2, the actuated double work contact sari - potential (--TB) is activated . the b-wire coming from the group selector is switched.

After completion of the turning process, however, the relay UR decays after a delay (it has been held up to now via its holding winding II). This opens the contact cri and switches to the still activated contact /,. But since the contact /, is also connected to the - telegraph battery, despite the switchover of the contact, uri is still - potential on the b-wire coming from the group selector. Via the contact, however, the relay F was de-energized at the same time, which in turn now drops out with a delay. This also brings the contact f, into its rest position and makes the final through-connection to the called subscriber. This - potential applied to the b-wire coming from the group selector during the fall times of the relays UR and F runs backwards to the relay H, which drops after some time, separates itself from the b-wire through contact hl and instead of it Relays SR and L (winding I) back to the b-wire via contact h2. The continuous signal current is dimensioned in such a way that - although it still acts on relay L (winding I), it can no longer cause it to drop so that the connection does not trigger. After the end of the continuous signal current pulse (to be recognized on the subscriber machine by passing through the machine) the calling subscriber can establish the write connection with the called subscriber in the usual way. If any random disturbance occurs during this telex traffic, which results in a process similar to that mentioned in the introduction to the description, i.e. if a new undesired connection is formed by the telegraphing impulses of the respective sending subscriber, then when the line selector is checked, any subscriber connection occurs also terminator criterion. However, since the delay relay H does not terminate the b-wire in the preselector, as was the case when the connection was established, but the relay SR and the delay relay L are connected, the connection is triggered because the length of the continuous signal stream from the line selector is dimensioned so that the relay L drops out before the end of the continuous signal current pulse. Relay L reverses the polarity of the subscriber loop, thereby stopping the subscriber machine and bringing relay R to waste, so that the preselector runs home and the connection is thrown together.

Fig. A shows an embodiment for a so-called remote subscriber, d. H. for a subscriber who is not at the location of the exchange itself, but is somewhere far away (for example in another city, etc.): To now to be able to guarantee the remote activation and deactivation of such a participant, A part of the selection must be made at the site of the remote subscriber station normal local participant existing switching means are repeated. This yourself repetitive switching means are summarized in Fig. z in the so-called. Remote subscriber termination FTA. The repetitive switching means have the same designation as in the selection receive and lead to the difference only a special identification, z. B. ER ', T' etc.

If such a subscriber calls by pressing his call button Rt in the subscriber station TS, a circuit for the call relay R 'in the remote subscriber termination FTA is thereby closed. By actuating the contact r'1, the subscriber-side winding of the relay ER 'receives power (the contact of the relay SR' is opposite to the position shown in its so-called false rest position). As a result, the relay ER sends 'by means of its contact er' isolating current over the long-distance line FL to the ER relay of the preselector. The ER-relay of the preselector contact places his he also characterized in the separating layer, whereby through addition of the effects of the windings I and II, the relay R reaches the preselector VW for addressing. Via contact r4, the preselector is now started up and checked for a free group selector in the usual way. Furthermore, the relay H (winding I) responds via contact r5. Checking for a free group selector is also characterized by the response of the relay T in the usual way. The preselector is stopped via contact t3 and the relays SR, L (winding I) and H (winding II) are received via contact t2. + -TB from the group selector. SR and L separate from the b-wire in the manner already described and directly receive + -T B. The further establishment of the connection takes the course already described. The subscriber chooses, and when checking the line selector on the called free subscriber, the selection from the line selector receives a final character criterion for a certain period of time, which causes the H relay to drop, but can no longer throw off the L relay that is switched on afterwards, so that the The connection remains and the participants can start writing traffic. If partial tripping takes place during the existing connection and a new subscriber is dialed, the final character criterion (trigger pulse) of the line selector only affects the L relay, releases it and thus triggers the connection.

Claims (1)

PATENT CLAIMS: i. Circuit arrangement for teleprinter systems with Voter operation, in which the dialing and telegraphing impulses by impulses are the same Type of current, but of different duration, and with which by the Incorrect triggering of an existing connection following telegraph impulses incorrect connections can come about and where to prevent such misconnections Switching means are provided, which immediately after the connection has been established the final character criterion applicable to the system in question for a certain period of time to send out to the calling party, while switching means in the the calling party Participants assigned part of the system the established connection despite incoming Maintaining the final character criterion, according to Patent 68o 75a, characterized in that that the switching means that after proper connection setup despite arrival of the final character criterion (trigger pulse) maintain the connection than Delay relays are designed and in the located at the exchange, Part of the system assigned to the calling subscriber (subscriber line circuit) lie. z. Circuit arrangement according to Claim i, characterized in that in the Subscriber connection circuit several delay relays to intercept the trigger pulse are present, each of which picks up part of the trigger pulse, the Relay affected first before the end of the trigger pulse from of the line switches off and transfers the rest of the trigger pulse to the other relays. 3. Circuit arrangement according to claim 2, characterized in that the fall time of the interacting delay relays is dimensioned so that the sum of all release times greater, each individual fall time is less than the duration of the trigger pulse. q .. Circuit arrangement according to claim 2, characterized in that two delay relays are available to intercept the trigger pulse. 5. Circuit arrangement according to claim a, characterized in that while the telegraph connection exists in the outgoing direction only one of the delay relays for the purpose of normal tripping is connected to the rear transmission line (b), when it falls the The connection is released. 6. Circuit arrangement according to claim z, characterized in that: characterized that with an incoming connection only one of the delay relays is switched on for the purpose of normal tripping. 7. Circuit arrangement according to Claim 2, characterized in that the through-connection of the rear transmission line (b) to the subscriber station only after the last delay relay has been switched on.