DE957489C - Circuit arrangement for blocking turnout inputs in the event of faulty turnout outputs in telephone systems - Google Patents

Description

The invention relates to a circuit arrangement to block disturbed turnouts for relocators in telephone systems with a connection line.

Converters are relay arrangements in which, the implementation of the necessary for a remote connection Character is made. Switches are switching devices, with which the connecting lines are equipped to eliminate multiple directions at the beginning of a Make the connection line and the separation of the directions at the end of the connection line to be able to. The switches are the converters mostly assigned.

There are known arrangements for converters in which a line in the office is not occupied as long as there is no switching device available in the opposite office for this line. Bine Occupancy of a connecting line is therefore prevented if, all outputs are occupied or there is another malfunction. Such a process, the reverse from a switching device blocks the inputs of the previous connection stage, is used as a reverse block or called rear lock.

The idea is to use the well-known reverse blocking also for turnouts, in the event of a disturbed output or any other disturbance in the incoming switch to be able to block the relevant input.

However, such an application of the known rearward blocking in turnouts arises on closer examination as inexpedient

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off, because if a switch output is faulty at a switch with z. B. nine directions, also that other eight non-disturbed outputs are blocked ·. This disadvantage could be remedied by a, uch for each individual direction in the arrivals The well-known principle of reverse blocking is used for the and outgoing points. To do this, it would be necessary to transmit the reverse lock starting from the disturbed output first choose the corresponding turnout input, and; then, to lock.

The effort to be driven here is, however, so considerable that the well-known reverse blocking in this form for turnouts is out of the question.

So there is one. To find a way in case of failure of a point output, the corresponding point input with the least possible effort to block switching means for an assignment :. According to the invention this is achieved in that upon arrival! and the first occupancy pulse becomes effective in the event of a disturbed turnout exit one in the incoming. Converter-generated return pulse, which is longer than the others for signaling The pulses used is, in the outgoing converter switching means that controls the blocking and. Labelling initiate the corresponding turnout. As can be seen without further ado, comes with it choosing the disturbed. Turnout entrance and the associated effort in. Elimination, since turnout entry and exit anyway are partly involved in establishing the connection. The partially established connection is known to Way then, triggered and; the participant receives Busy signal.

Is the fault z. B. in the mixer located at the switch output, so ° can who the Participants causing occupancy after re-election via another non-disturbed switch control the same direction - the first dialing process "as a result of the disturbed switch output the former switch could not be used.

The idea of the invention is illustrated in an exemplary embodiment varan-4.5 vividly.

The figure shows a relay arrangement as a section of a switch at the outgoing converter.

Relays 1 to 9 are assigned to each input E ₁ to E _9. If a turnout input, e.g. B. £ ₃ , activated, then with the help of relay 3 and relay A ₁ on the incoming side of the turnout output 3 is assigned. The switching operations required for this! should not be explained in more detail here, as they are used for the, object! of the invention are not important.

If the switch output 3 _{X is} disturbed, then

a reverse pulse generated in the incoming converter (return pulse) is sent to the line, which controls switching means in the outgoing converter that control the blocking · and. Marking of the turnout entrance 3 initiate. At the same time, this return pulse is evaluated as a busy pulse, i.e. H. the calling party receives. Busy signal :.

The evaluation of the incoming on the long-distance line alb. Return pulse takes place in the signal receiver 10 such that a relay / is energized for the duration of the return pulse.

The relay / opens the circuit with its contact i II: earth, contact r II, ill, winding 1/6 j of a relay R that has been energized up to then, and the relay R drops after a certain through the. Condenser C conditional. Time of the current knee interruption. At the same time, the capacitor C prevents R from dropping if the relay / impulses arriving at the signal receiver are excited, all of which are shorter in length than the return impulse.

As soon as the relay R has dropped out, the circuit is closed: earth, r III2 contact, 31112 contact, winding 2/1 of the 6 * / »3 relay, the relay Sp 3 responds, blocks with its: contact sp 3II the input 3, triggers an alarm device via a contact (not shown) and persists via: earth, button T 3, contact sp $ III, winding 5/6 of the 6 "/> 3 relay.

By contact, sp 3II also the circuit for the seizure relay C is interrupted .; this drops out 'and initiates the usual trigger pulse in the incoming converter, which switches off the return pulse via switching means. This causes the / relay to go to the outgoing. Side back to its rest position ·, and the i? Relay is excited again via: earth, cl2 contact, rll contact, fll contact, winding 1/6 of the i? Relay. Contact rli closes and. This ensures that the other inputs can still be used. Input E 3 remains blocked. The same \ ^r organg repeated if further outputs the incoming Soft are disturbed.

Once the reported fault has been rectified, the associated button Γ 3 is pressed and thus the 67> 3 relay brought down and. the entrance 3 released again,

Claims (2)

105 claims: i. Circuit arrangement for the blocking of turnout inputs in case of disturbed turnout outputs. In telephone systems, in, those, the turnouts. Converters are assigned, characterized in that a return pulse generated with the first assignment in the incoming converter, which is used longer than the rest for signaling. Impulse is, in the outgoing converter controls switching means (J, H) , which initiate the blocking and identification of the corresponding turnout input via further switching means. 2. Circuit arrangement according to claim 1, characterized in that a relay (Sp) is provided for each direction as switching means for the blocking. For this purpose ι sheet of drawings