DE596041C - Telegraph system, in particular with dialing operation, in which the anchors of the relays used to transmit the telegraph characters (e.g. polarized relays) have two rest positions - Google Patents

Description

GERMAN EMPIRE

ISSUED ON APRIL 26, 1934

REICH PATENT OFFICE

PATENT LETTERING

JVi 596041 CLASS 21a ¹ GROUP 5o4

Siemens & Halske Akt.-Ges. in Berlin-Siemensstadt *)

Patented in the German Empire on July 7, 1928

In telegraph systems, especially those with voter operation, the task is set the operating status from a station (usually from a sending station) influence from other stations or from connection devices, especially when a connection with a specific subscriber is established or initiated or after Termination of traffic will be canceled

For remote printer systems with correspondence via fixed connection lines, it is known to switch on the remote receiver of the initiating traffic Station to close a circuit through which a special switch-on magnet is attached the receiving station is energized while the receiving station is switched off after completion the transmission is carried out by sending a combination of characters that is specific to this Purpose is specially provided.

Similarly, it is known for telegraph systems with voter operation, in the connection point to provide a special relay,

ag das first (when initiating a connection) lies in the line and by closing a circuit of the making the connection Station is energized off, but after the connection has been switched through or after responding of the pre-selection devices is switched off while the resetting of the selection devices after the end of traffic in such systems via a second circuit - (e.g. earth) by influencing a special one differential relay provided for this purpose.

To the disadvantages that are caused by the use of a second circuit Avoid, it has already been proposed to reset the electoral systems when repealed to make the connection via the telegraph lines by means of pulses, whose Type of current or frequency from which the telegraph impulse is different. Such a kind however, the reset again requires special power sources and reset relays and is not suitable for making the monitoring of the system simple.

The invention now aims for telegraph systems with switching operation, in particular those with voter operation, while avoiding the disadvantages mentioned above, the same degree to achieve operational safety and ease of use for telephone systems, where the connection is initiated by lifting the handset and by hanging up the

*) The patent seeker stated as the inventor:

August Jipp in Berlin-Siemensstadt.

rers is repealed, has long been known. For this purpose, according to the Invention that lies in the telegraph circuit for the transmission of telegraph characters used relays in a certain way as control relays for controlling the desired Switching operations are used, and it is made use of the fact that The armature of such relays can have two fixed positions, either due to the relay construction or by switching the relays both are defined as rest positions. The armature of a polarized relay with unstable If the winding is de-energized, for example, the middle position has two rest positions by having by the directional force of the permanent magnet depending on the direction of the last received Impulse is pressed either against one or the other contact piece. In a similar way Way has with a neutral relay, which during the telegraphing traffic with quiescent current is operated, the attracted position of the armature as operationally determined rest position to apply, since the anchor only during a character current pulse, i. H. in this Fall during a current interruption causing the anchor drop, leaves this rest position and immediately returns to it when the character current pulse ceases. on the other hand but here is also the position of the corresponding to the currentlessness of the relay winding Armature to be referred to as rest position if this position is a rest state of the circuit or corresponds to a part of the circuit. Under such circuitry requirements a neutral relay is also to be regarded as a relay with two rest positions.

According to the invention, such relays with two rest positions are used to control the Desired switching operations exploited that the relay armature in the one rest position the Traffic initiating switching operations (e.g. occupancy of the voters) and in the other rest position trigger the switching processes that end traffic (e.g. resetting of the voters). the The relay is then appropriately controlled in such a way that the anchor is released when the traffic ends or when the connection to one of the company retirement (i.e. the dem Separating current corresponding position) deviating rest position can be transferred, which is considered to be the wrong rest position should be designated. Conversely, the relocation of the relay armature, from this wrong Rest position in the company rest position when establishing or initiating a connection and used to do the switching operations required to initiate traffic trigger.

The relays can preferably have such a false rest position in their character stream assume the appropriate working position. The reversal of the relays upon initiation or Cancellation of the connections can then be caused by current changes in the telegraphing circuit which, in their type of current and their character, correspond to the telegraph impulses corresponding current changes and of which the introductory current change in their sense of direction of the change in current during the transition from the symbol pulse to the separator pulse, the change in current causing the termination of the connection is reversed to the change in current at the transition from the separation pulse corresponds to the character impulse.

When leaving the wrong rest position, for example, a preselector can be used to prepare of choice in telegraph systems with voter operation, while the Return of the armature to the wrong rest position to reset the dialing devices used can be exploited.

When using polarized relays, the relay armature can be turned over from the wrong rest position in the company rest position z. B. by one when switching on the drive motor of the telegraph apparatus triggered capacitor current surge, by which the armature of the transmitter relay is relocated and thus the receiving relay is also reversed.

The invention is explained in more detail below with reference to the drawing. In the drawing Fig. 1 shows a schematic representation of the basic principle of the new circuit, while Fig. 2 shows a practical application example of the circuit in a teleprinter with Represents voter operation.

In Fig. Ι W means the winding of a receiving relay with the normally open contact α and the normally closed contact r. The two contacts are led to the two poles of a battery B , the center of which is grounded. Due to the pulses picked up by the winding W , the armature of the relay is alternately placed on the normally open and normally closed contact, so that a current of alternating direction is closed in a known manner.

The normally open contact α of the relay, which is closed during the incorrect rest position of the relay, is bridged by the winding V of a delay relay. The delay relay is short-circuited when the receiving relay W is in the wrong rest position. If the receiving relay is now energized, its armature is placed on the real normally closed contact r, whereby the delay relay V is connected to the battery B and is energized. The contacts of the delay relay are thus relocated and, as a result of the delayed armature drop of the relay, remain in their working position even when the receiving relay armature oscillates, since the opening of the normally closed contact r and the

Closing of the normally open contact α only ever takes place in pulses.

But if the transmission is finished and the subscriber gives the final surge in the line, the armature of the receiving relay W is finally and for a long time placed at the contact α in the wrong rest position, so that the delay relay V comes to waste.
Fig. 2 shows one possible application

ίο this circuit in the preselector circuit of a teleprinting system with selector operation. Receiving relay W of Fig. Ι here corresponds to the polarized relay -Ei ?, which arrival to the pulses originating from the subscriber TS

iS speaks and whose contact he transmits these impulses via the contact arms v ^a and v ^{b of} the preselector to the other voters or to the distant participant. The delay relay V in Fig. I, which bridges the normally open contact of the receiving relay armature, corresponds to relay X, which controls the preselector.

The subscriber station TS is, for example, connected to the control center via a double line L ^a , L ^b.

In order to enable reciprocal communication between the connected subscribers, the well-known differential circuit is used in the control center, in which a replica N of the subscriber loop is used and the contact sr of the transmitter relay SR with the transmitter battery is in the diagonal branch that is connected to the center of the winding Receiving relay ER is connected. This prevents the receiving relay ER from responding to the impulses emanating from the transmitting relay armature sr.

To initiate the connection, the subscriber TS first reverses the receiving relay ER so that its armature is moved from the incorrect rest position corresponding to the working position to the operational rest position. The delay relay X is thereby connected to the battery B and closes the contact x, which, for example with the interposition of a further relay R, stimulates the preselector, which can be switched according to the usual way in telephone technology.

The starting circuit of the preselector is closed by contact r _x of relay R:

Negative pole of the battery, breaker RU, rotary magnet D, normally closed contact t _e , normally open contact r _v normally closed contact t _s , selector arm vf, earth. The preselector starts up, and the switching takes place in the following circuit, which is only dependent on the contact t _e : battery, RU, D, t ₆ , continuous segment, vf, earth.

As soon as the test arm ve a free line, e.g. B. has found a line e leading to a free group selector , the test relay T responds in a known manner: line e, ve, T, t ₅ , r _x , vf, earth, the test relay Γ picks up and switches with t _{s off} its high-resistance winding, thereby making the line occupied, and is maintained via the normally open contact t ₆ : line e, ve, T, r ₂ , t _B , vf, earth. At the same time, the rotary magnet D is switched off by the contact t ₆ , so that the preselector stops on the line reached.

When the test relay responds, the contacts ^ ₁ to t _t also switch through the two double lines a, b, and c, d , which are provided within the control center for the transmission of the impulses in the two opposite directions of traffic.

Are sent from the subscriber TS of pulses in the line, the anchor will move into the operating position of the relay ER in the central pulsed manner in which it short-circuits the relay X. Its fall time is such that its armature is held in the tightened position.

Only when the subscriber TS after completion of the transmission, z. B. by switching off its motor, which sends the final surge into the line, the relay ER is switched back to the wrong rest position, in which the relay X is permanently de-energized and short-circuited. The relay R is then also brought to waste by the contact χ , which disconnects the holding circuit of the test relay T by resetting the contact r ₂ . The test relay T comes to waste and, by means of contacts ty to £ _{4, separates} the two circuits a, b and c, d used for transmission within the control center, while at the same time the switch-on circuit for the preselector is closed by contact t _e whose arms are switched to the starting position: battery, RU, D, t ₀ , continuous segment, vf, earth.

After the described interruptions in the operating circuits also the Triggering the other voters has been initiated, the system is back in Hibernation.

Claims (4)

Patent claims: i. Telegraph system, especially with voter operation, in which the anchors of the zur Transmission of the telegraph characters used in the telegraph circuit Relays (e.g. polarized relays) have two rest positions, characterized in that that the telegraph relays are also used as control relays by the relay armature In one rest position, the switching operations that initiate traffic (e.g. receipts the voter) and in the other rest position the switching processes that end the traffic (e.g. resetting the voters). 2. Plant according to claim i, characterized in that the armature of the Telcgraphierrelais after the end of traffic or termination of the connection to a different from the company rest period Rest position (wrong rest position) are turned over. 3. Plant according to claim 2, characterized in that the armature of the telegraph relay are transferred to work after the end of the traffic or disconnection. 4. Plant according to claim 3, characterized in that the working contact of the Telegraph relay is bridged by the winding of a delay relay, the Control contacts in a known manner selection and tripping devices of other voters. For this purpose ι sheet of drawings