DE181811C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

■ -.Λ * 181811 CLASS 21 α. GROUP

HANS CARL STEIDLE in MUNICH.

Circuit arrangement for telephone systems.

Patented in the German Empire on January 28, 1906.

The invention relates to a circuit arrangement for telephones that allow the connection of two subscribers, one of which is at the time of the Connection is already in conversation with a third party, enables and after the existing connection has been completed, the automatic connection of the reserved one Subscriber to the intended intercom

ίο has the consequence.

The technical means, which is achieved by that after completion of the existing connection of the automatic connection of the desired and initially only associated subscriber ^{vormerksweise%} ER- follows, and the official Simultaneously, the implementation of the terminal for the purpose of. ' Sending of the wake-up current is announced in the established connection, are given by the test systems required for each multiple switching system to determine whether the line of the respective desired subscriber is free or not. As soon as one of the multiple jacks belonging to a subscriber line is occupied by establishing a call connection, all other associated multiple jacks appear electrically charged in the office, for the purpose of sending a characteristic current to the officer when touching the jack sleeve with the plug tip Test noise causes and indicates that the line is busy. The present device for establishing the reserved connection now uses the test device just described to cause the voltage state of the pawls in the event that the line is busy to establish a local circuit, which disconnects the subscriber initially designated to the multiple jack from the existing connection during the same, as well as the connection of the same to the desired line BEZW. the announcement that the line has become free after the existing connection has been dealt with.

In Fig. Ι and 2 two embodiments of such a circuit arrangement are shown, namely the circuit of Fig. Ι shows the state up to which the process has proceeded when the calling subscriber N ₁ has announced the desired number to the switchover officer. The fact that the desired subscriber N ₁₁ initially connected to N ₁ by the introduction of the connecting plug VSt ₁ into the multiple jack VK ₁ is already in conversation with a third subscriber at the time the connection is established, is shown in FIG the connection of the multiple pawl VK ₆ with the interrogation pawl AK _{3 of} the subscriber N _{111 is} shown. In the embodiment of the reservation device according to FIG. 2, the reserved connection is made by simply turning the reservation switch.

In order now to the circuit of Fig. 1, the compound N produced by means of the plug ^ 4A ₁ and VSt ₁ during the duration of the call between N ₁₁ and N ₁ Jj ₁ N ₁₁ only after the end of this conversation are effective to make, and thus the listening of the conversation by notifying N _n

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exclude connected nodes N _1, a Abschalterelais AR which α in the excited state of the cord wires and b of the connector plug VSt ₁ from those of the query plug .ASI ₁ isolated in such a way connected to a Vormerkschalter VS that during backward movement of the shift lever H (downward movement ) the test battery PB ₁ connected to the test sleeve Ix _{1 of} the connecting plug VSt ₁ in its normal state (position in FIG. i) exchanged its place in the circuit with this switch-off relay AR. As soon as the switchover officer has determined that the line is busy by means of the telephone T in a known manner by applying the tip of the connecting plug VSt ₁ to the test sleeve Ij _{1 of} the multiple jack VK ₁ after receiving the desired number from the calling subscriber, he leads the connecting plug into the relevant multiple jack and puts the A ^ ormark switch VS backwards (down) to exclude the calling subscriber N ₁ - initially from the parallel connection with the existing connection.

The current flows that occur during these switching operations are as follows:

i. Test circuit: (- (-) pole of battery B, test telephone T, monitoring relay ÜR, output

branching to the transformer Tn, contact 1 at Abschalterelais AR, tip of the connecting plug FSi _1, test sleeve Jt ₁ of the joint pawl VK _1, leguminous line / Prüfhülsefc ₅ of the multiple jack VK _5, test sleeve of the connecting plug FSi _2, plug conduit C _2, test battery PJB _2, Earth, (-) pole of battery B. In this case, the monitoring relay ÜR is not energized because the batteries B _{and PjB 2 are connected} against one another.

2. Circuit for the exclusion of eavesdropping on the conversation in progress between the desired subscriber N _n and the subscriber N _ni by the subscriber N ₁ connected to the designated participant:

■ (-) -) terminal of the test battery PB _2, plugs line c ₂ of the connector plug VSt _2, test sleeve /? ₅ , sleeve cable / j test sleeve It ₁ , plug cable C _{1 of} the connection plug VSt ₁ , contact 2 on the reserve switch VS, cut-off relay AR, earth, (-) pole of the test battery PB ₂ . The switch-off relay AR has therefore been connected to the test sleeve by the movement of the pre-notice switch VS downwards, while the test battery PB _{1 is} connected to the test sleeve h via a contact 17 on the pre-notice switch _{and the plug line C 1} when the pre-notice switch is in the idle state. The battery PB is identical to the test battery PJS ₁ and has only been drawn so that the third plug cord does not have to be led to battery PB ₁ .

The relay AR opens its break contacts ι and 3 under the influence of the above-mentioned current flow and, as a result, initially disconnects the subscriber N ₁ from the existing connection N ₁₁ N ₁₁₁ .

3. Signal circuit: (-f) Pole of the final sign battery BS, final relay SR, branch η on the transformer Tn, both lines a and b of the interrogation plug, 4Si ₁ , both springs a and b of the interrogation pawl AK, both branches of the subscriber line JLj, windings I and II of the Alarm clock W ₁ , branch point 0, handset hook H ₁ , contact 4 (after notification from the switching officer that the desired subscriber N _n "is occupied, subscriber N ₁ has hung the receiver on hook H ₁ ), earth, (-) Terminal of the final sign battery BS. The final relay SR picks up its armature and closes the following local circuit:

4. Local circuit: (+) pole of the battery BS, contact 5 on the closing relay SR, reservation cleat VL, contact 6 on the reservation switch VS (because the switch is pressed down or backwards), earth, (-) pole of the battery BS. The reservation cleat lights up.

As soon as the connection N ₁₁ N _{111 is} done, the switchover officer pulls the plugs ASt ₂ and VSt ₂ from the jacks AK ₃ and FK ₅ and thereby disconnects the test battery PJ3 ₂ from the jack sockets.

- As a result, circuit 2 is interrupted and the switch-off relay AR closes the contacts ι and 3 and thus switches the connecting plug lines α and b to those of the interrogation plug ASt ₁ . Since subscriber N ₁ J has hung his receiver on the hook after the conversation with Njjj, the following circuit now arises:

5. (-f-) pole of battery B, test telephone T, monitoring relay ÜR, junction m on transformer Tn, contacts 1 and 3 on switch-off relay AR, plug lines α and b, springs a and b of multiple latch VK ₁ , multiple line α b, Branch points d and e, subscriber line L ₂ (both branches), windings I and II of the alarm clock W ₂ , branch point p, receiver hook H ₂ , contact 11, earth, (-) pole of battery B.

The now excited monitoring relay ÜR picks up its armature and closes the following local circuit:

6. (+) pole of battery B, contact 8, monitoring lamp ÜL, earth, (-) pole of battery B. When the monitoring lamp ÜL lights up, this means that the existing connection N ₁₁ N _{111 has been} dealt with and Njj is automatically connected N _{1 has} connected. ,

The changeover officer therefore puts the preregistration lever VS up or up after the lamp ÜL has glowed. forward and posted

so the wake-up current in the established connection.

Circuit: a) Terminal I of the call dynamo RD, contact 9 on the reservation switch VS, branch point 12, ε line of the connecting plug VSt ₁ , b-branch of the multiple line α b, branch point e, winding I and II of the alarm clock W _% , branch d , α-branch of the multiple line α b, α-line of the connecting plug VSt ₁ , junction 10, contact 7, terminal II of the Rufdynamo RD.

b) Terminal I of the Rufdynamo RD, contact 9 on the reservation switch FS, branch point 12, winding II of the transformer Tn ,.

Junction 10, contact 7 at the reservation switch F5, terminal II of the call dynamo.

c) The current induced in the winding I of the transformer Tn has the following profile:

Terminal 14 on the transformer Tn, α-line of the interrogation plug ASt ₁ , α-branch of the subscriber line L ₁ , turns I and II of the alarm clock TF ₁ , b-branch of the subscriber line L ₁ , ε-line of the interrogation plug ASt ₁ , terminal 15 on Translator Tn:

The wake-up current of the Rufdynamo calls the participants N ₁ and N ₁₁ to talk. Simultaneously with the call of the participants by upwards resp. Moving the reservation switch VS forward, the exchange of the reservation cleat VL with the tail lamp SL in the local circuit 4 was carried out.

As soon as the two subscribers N ₁ and N _n hang their receivers on the hook switches and thus cause the closing of the circuits 3 and 5 at the contacts 4 and 11 by attaching the hooks on the microphone units N ₁ and N _n , light up the tail lamp SZ, and the transmission lamp ÜL on. The local circuit for the tail lamp is as follows:

(+) Pole of the battery BS, contact 5, lamp SL, contact 16 on the reservation switch, earth, (-) pole of the battery BS.

The polling officer then clears the connection.
• In Fig. 2, a further embodiment of the memory switch VS and the switching arrangement is shown, such; that the connection of the reserved subscriber to the reservation switch, which takes over the work of the cut-off relay AR by means of the appropriate spring addition f _x and f _t , can be made. In this case, the switch-off relay is only designed as a signal relay SR, which in the idle state causes the reservation cleat VL to light up. The preregistration switch then has the only task of preparing the signal circuit via the preregistration cleat via contact χ .

The switching operations that result when this arrangement is used, along with the ones belonging to the train The circuits are as follows:

As soon as the Umsghaltebeamte has determined that the line is busy by means of the telephone T in the known manner by placing the tip of the connecting plug VSt ₃ on the test sleeve Zj _{1 of} the multiple _{jack FKT 1} after receiving the desired number from the calling subscriber, he introduces the connecting plug the relevant multiple latch and puts the reservation switch VS backwards (down) in order to initially exclude the calling subscriber N ₁ from the parallel connection with the existing connection; the exclusion of eavesdropping takes place here by switching off the voice line of the connecting plug VSt ₃ , at the reservation switch VS itself, as can be seen from FIG. 2, since the contacts on the springs / _I; / ₂ , / ₃ and / _{4 are opened} by pushing the lever H backwards and the plug-in telephone lines ending at f ₂ and f _{s are isolated.}

Simultaneously with the disconnection of the calling subscriber from the existing one The switching of the reservation switch to the reverse position has the following connection Effects:

1. The test battery PB ₁ is swapped with the • signal relay SR , which picks up its armature.

Circuit: (-f-) pole of test battery PjB ₂ , _{plug line c 2} of connection plug VSt ₂ , test sleeve Zi ₅ , sleeve line /, test sleeve A ₁ , plug line C ₁ of connection plug VSt _3,. Contact 6 on the reservation switch VS, signal relay SR, earth, (-) pole of the test battery PjS ₂ .

2. The signal circuit via the reservation terminal Vi is prepared for contact χ on the reservation switch. As soon as after the end of the conversation between N ₁₁ and N _{J {[} the officer pulls the plug .4Si ₂ and VSt ₂ , the test sleeve h _s and thus also Zj _{1 is} de-energized, so that the current flowing through the signal relay SR is now interrupted.

The signal relay SR therefore releases its anchor and the reservation cleat lights up.

Circuit: (+) pole of the signal battery SB, contact χ to VS, contact y to signal relay SR, preregistration cleat VL, earth, (-) pole of the signal battery SjB.

Since the light of the officer's cleat is the sign of the vacancy the occupied line and thus the time for the processing of the reserved Indicates conversation, puts the officer

now the reservation switch FS temporarily in call position (upwards) and then lets the same pass into the intercom position. *

This first connects the two subscribers N ₁₁ and N ₁ as required and then calls them up for a conversation. Circuit: a) Terminal I of the call dynamo, contact 9 on the reservation switch VS, branch point 10, contact 17 on VS, α-line of the connecting plug FSi ₃ , α-branch of the multiple line from, branch point d, windings I and II of the alarm clock W ₂ , Branch point e, b-branch of the multiple line α b, b- line of the connecting plug VSt ₃ , contact 16 to VS, branch point 13, contact 7 to VS, terminal II of the call dynamo.

b) Terminal I of the Rufdynamo, contact 9 at VS, junction 10, windings I.

of the transformer Tn, junction 13, contact 7 at VS, terminal II of the call dynamo.

c) The "wake-up current" induced in windings II by Tn reaches subscriber N ₁ in the following way: Terminal 14 on

Transmitter Tn, α-line of the interrogation plug, α-branch of the subscriber line L ₁ , turns I and II of the alarm clock W ₁ , b-branch of the subscriber line L ₁ , b- line of the interrogation plug, terminal 15 on the translator Tn.

The wake-up stream thus calls subscribers N ₁ and N ₁₁ to talk.

Simultaneously with the transition of the reservation switch VS to the intercom position, the reservation clamp VL goes out because the lamp circuit was interrupted at contact χ.

Claims (4)

Patent Claims: i. Circuit arrangement for telephone 4.0 systems, characterized in that the production. the connection on the part of the switchover officer via the break contact (17) of a reservation switch (VS) to the test line (I) of the interrogation and associated multiple jack attached test battery (PB ₁ ) in the case of the occupancy of the desired subscriber (e.g. Njj ) subsequent backward movement of the reservation switch with a switch-off or. Signal relay (AR, Fig. 1, respectively Si ?, ■ Fig. 2) is swapped, for the purpose of either the automatic establishment of the marked connection. to allow at the moment of discharge of the existing at the time the hold conversation by Stromloswerden of Abschalterelais (AR) and the production of the desired compound (between N ₁ N ₁₁₎ display or simultaneously by illuminating a monitoring lamp (ÜL) only by the result Stromloswerdens the signal relay (SJR, Fig. 2) brought to the response signal (VL) to announce the time of the release of the desired connection to the connection and calling of the subscriber to the officer. 2. An embodiment of the circuit arrangement according to claim 1, characterized in that after the preregistration switch (VS) has been switched over by means of the call dynamo ( VS) by means of the call dynamo (VL) as a result of the release of the reserved connection by lighting up the monitoring lamp (ÜL) and RD) a ringing current is sent on the one hand to the marked subscriber (N ₁₁ ) and on the other hand to the winding of one leg (II) of the transformer YjTmJ, so that the current induced in the other leg (I) of the transformer also simultaneously causes the calling subscriber (N ₁ ) is called from the office and thereby both participants are notified of the connection that has now been established. 3. An embodiment according to claim i, characterized in that a in the reverse position of the preregistration switch (VS) via its normally open contacts (6) when the closing relay (SR) is energized the preregistration cleat (VL) when the ormark switch is turned into the rest position with the tail lamp (SL) is swapped for the purpose of enabling the operator to control the subscriber stations (N ₁ N _n ) after they have been called. 4. An embodiment according to claim i, characterized in that after the indicated vacancy of the reserved connection by the lighting of the Vormerklampe (VL) due to the lack of current in the signal relay (SR). the reserved connection by simply moving it _; of the reserve switch (VS) is established in the call position. 1 sheet of drawings.