DE633246C - Circuit arrangement for selective Morse code calling from branch points located on a common line in telecommunication systems, in particular telephone systems - Google Patents

Description

The invention relates to a circuit arrangement for the selective calling of Junction points located on a common line in telecommunications, in particular Telephone systems in which the branch points equipped with dialers are equipped with time switches are assigned which, depending on each setting current surge, their ultimately triggering the voters Begin the process, but are repeatedly set to the initial state by subsequent power surges will.

The aim of the invention is to prevent incorrect calls to undesired places in such systems safe to avoid and this is achieved by the fact that the time switch means that the with Voters are assigned to equipped branch points after each one has been completed the current impulses used for setting as a function of those influenced by them Switching devices are switched on in preparation, but only after completion of the electoral process come into effect and automatically the transfer of the associated Bringing voters back to rest. The arrangement according to the invention offers over known arrangements in which time switching means serving to trigger the selection devices at the beginning of each adjustment current surge are set, the advantage that the arrangement of the duration of the current surges that z. B. when signaling by means of Morse code is different, becomes independent.

Such arrangements are particularly suitable for such telecommunications systems in which apart from the participant locations, which by agreed upon, at all such locations perceptible characters (Morse code or the like) are called, including subscriber stations (preferred places) are provided, at which only certain characters a call effect so that these (preferred) participants are not constantly disturbed by the other calls that do not apply to them.

In the accompanying drawing is an embodiment of the inventive concept shown, to which the invention is not limited. It's only for Understanding of the inventive concept shown details necessary.

In the exemplary embodiment, a connecting line VL is shown, to which any number of subscriber stations (simple subscriber stations .Si or preferred subscriber stations BSf) can be connected in parallel to one another. Each simple subscriber station St has a per se known and therefore only shown schematically.

*) The patent seeker stated as the inventor:

Robert Kruse in Berlin-Siemensstadt,

esa

Equipped given inductor station at which the current impulses sent via the connecting line VL , ^ for example, by ^ triggering an alarm clock, come into play. The preferred subscriber actuating ^ · BST, which may be formed for example as Vermittlung'srstellen are connected with a responsive current surges relay L to the \ ^r Getting Connected line VL ίο the current pulses recorded by this relay act via the relays A or B on the selector Tr and on the time switches (for example thermal relays) Th α and Th h . After each choice of a subscriber place one of these timers comes after a certain time to respond and causes the relay AR I to reset the dial and also to the selected subscriber station via the winding ARII the call.

The switching operations are as follows: The call sign of a preferred location should consist of six consecutive power surges, for example. The length of the individual current impulses is irrelevant • only the length of the pause following each current impulse. As soon as the first current surge excites relay L , contact 1 1 for windings A I and i? II closed a circuit. In this circuit, only relay A responds, while relay B cannot attract its armature through its winding B II alone. The contact 13 a closes a circuit for the rotary magnet Tr of the selector plant: -, resistor J ¹ F, winding Tr, contacts 13 a, 14 b, earth. The magnet attracts its armature and remains energized for the duration of the current surge. The contact 3 a produces a holding circuit for the relay A , in which the relay B with its winding B I is at the same time. is switched on preparatory. The circuits for the thermal relay Th b and the reset relay AR are prepared by the other contacts 5α 'and γα.

In the pause following the first pulse, the relay L is de-energized, as a result of which the contact is opened. 1 1 the short-circuit for the windings A II. And BI is canceled, so that now the relay B comes to respond. The relay A continues through its winding A II, although its response winding AI is short-circuited by the contact 2 b. By turning over the contact 146, the circuit of the step-up structure Tr is disconnected and the switching arms 4 tr and 10 tr of the selector mechanism are advanced by one step. It is therefore switched on via the switching arm 10 tr located on the contact rail 1-15 and the contacts 5 α and 6 b, the heating coil of a thermal relay Th b . Currency _{t. ;} This switching state remains between the break and the arrival of the next current surge

ie the thermal contact th b was supposed to close gradually. '- "" Upon arrival of the second current pulse of the contact 1 1 is brought to the working position, are short-circuited again so that the windings A and II BI. As a result, the relay A now comes to waste, whereby the previously switched-on heating winding Th b is de-energized as a result of the switching of the contact 5 α. The circuit for the heating winding of the second thermal relay Th α is now prepared for this. The second control relay B is held by its winding B II: -, B II, 2b, 1 I ₁ +. The fall of the relay A also has the consequence that the switching magnet Tr attracts via the contacts 14 b and 13 a.

After the end of the second current surge, contact 1 / is opened again. The holding winding B II is now also switched off, so that both control relays A and B are in the idle state. When the contact 6 b falls, the circuit for the heating coil of the thermal relay Th α is switched on: +, rotary arm 10 tr on contact segment ι-15, 8 ar, 6b, Thα, ζ α, -.

If now, before the thermal relay Th α takes effect and the call relay AR can switch on via the contacts 7 α and th α , another current surge, the winding of the thermal relay Th α is also switched off, since the relay A again ' comes to attract. It. consequently, the heating winding Th b is switched on again in preparation, which receives current during the pause following this current surge. If the current surges continue to occur, the processes already described are repeated. The control device A, B ensures that the heating windings of the thermal contacts are de-energized during the current surge duration, while one or the other of the two heating windings is switched on alternately in the break following the current surges. The time of two power surges and the pause in between is therefore available for resetting a thermal contact that has just been switched off until it is switched on again, in which time the thermal contact can cool down with sufficient certainty and return to the rest position.

If the switching arm 4 tr of the selector mechanism has reached contact point χ after the specified number of current surges has ended, the pause following the last current surge exceeds the set period of time,

the thermal contact switched on during this power surge pause is closed. It therefore attracts the step relay AR, for example when the contact Th a is actuated, with both windings via the following circuits: - {-, io tr on contact segment ι-15, 7 a, th ü, and now in parallel on the one hand via rotary arm 4 tr Contact x, AR II and on the other hand via AR I to · -.

The contact 15 ar II closes, the indicator AK appears.

The selector mechanism is reset automatically after the indicator has been triggered by the fact that the magnet Tr is brought back to the zero position in a self-interrupting circuit (by means of the contacts 11 ar I, 12 tr) : ~ \ -, το tr (ι-15), 11 β / · I, winding Tr, resistance W, - ·. If the selector has reached the zero position again, the self-interrupting circuit for the magnet is interrupted.

The switching operations in the other preferred locations are, since the switching devices are the same everywhere and only the calling devices at the various preferred locations are placed on different contacts of the dialing mechanism, as just described, except for the response of the calling devices, which is the case with all but the selected subscriber station does not occur, so that immediately after one of the time switches has responded, ie after selecting a subscriber station, also at all other preferred locations as a result of switching on the first winding of the .4 ^ relay AR I the transfer of the dials into the zero position takes place.

The call signs for the preferred digits will vary according to the number of simple ones Places that are made up of several short and long power surges call combined characters, preferably chosen so that the number of power surges for the shortest ringing tone of a preferred subscriber station is greater than the number of power surges for the longest call sign of a single call Subscriber station.

For example, if a simple subscriber station has the call sign - · -, then corresponding current surges are sent over the connecting line for their call. At This sign is audible to all simple subscriber stations when the alarm clock is triggered made. At the same time, all dialers are also at the preferred subscriber stations set to the third step. After the election, there are no more power surges follow, the timers to respond to the preferred subscriber stations and cause the dialing mechanism to be reset to zero without turning it on one of the preferred subscriber stations to address the call facility comes, and without further measures on the part of the caller or a common switching device become necessary to reset the dials. With each new call, all dials are therefore always repeated started from zero position.

Claims (6)

Patent claims: i. Circuit arrangement for optional Morse code calling from branch points located on a common line in telecommunication systems, in particular telephone systems, in which the branch points equipped with voters are assigned time switching means which, depending on each current surge, begin their process that ultimately triggers the voter, but always through subsequent current surges be put back into the initial state again, characterized in that the time switching means (thermal relay, time switch Th a, Th b), which are assigned to the branch points (BSt) equipped with selectors, after the completion of each of the current impulses used for setting depending on be switched on preparatory by these influenced switching devices (L ₁ A, B) , but only come into effect after the end of the voting process and automatically bring about the transfer of the associated voters (Tr) to the rest position. 2. Circuit arrangement according to claim I, characterized in that the time switch means consisting of a plurality of time switches (Tha, Th b) are switched on alternately one after the other in the event of successive influences. 3. Circuit arrangement according to claim i, characterized in that the time switches (Tita, Thb) cause the switching on of the drive magnets (Tr) in a circuit leading to the switching of the selector into the rest position when they become effective (by means of relay AR). 4. Circuit arrangement according to claim 3, characterized in that the time switches (Tha, Th b) bring an auxiliary switching device (AR II) to effect at the connection point marked by number dialing, which controls the call device of this connection point. 5. Circuit arrangement according to claim 4, characterized in that the time switch (Tha, Th b) is a step relay (AR) control, which is brought to the first switching stage (ar I) after the end of the selection at the undesired connection points and only brings about the transfer of the selector to the rest position, while the relay at the desired connection point the second switching stage (ar H) can take and besides the transfer of the voter to the idle position also influences the call facility. 6. A circuit arrangement according to claim i, characterized in that the calling devices (AK) of the connection points connected to a common line, depending on the type of connection points, either over the line or (z. B. in the preferred points) with the temporary participation of these Connection points provided voters are influenced. 1 sheet of drawings