DEV0009207MA - - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

Registration date: July 15, 1955. Advertised on August 9, 1956

GERMAN PATENT OFFICE

The invention relates to a circuit arrangement for blocking disturbed switches for converters in remote intercom systems with connecting lines.

Converters are relay arrangements, in, those, those Implementation of the characters necessary for a remote connection is made. Switches are schiata devices, with serve, the connecting lines are equipped to eliminate multiple directions at the beginning of a Connection line and the separation of directions; at the end of the connection line to be able to. The switches are mostly assigned to the 'converters'.

There are known arrangements for converters in which, a line in the office cannot be occupied ¹ as long as no switching device is available in the opposite office for this line. An occupancy of a connection line is prevented if all exits are occupied or there is some other malfunction. Such a process, which blocks the inputs of the previous connection stage from a switching device in reverse, is referred to as reverse blocking or reverse blocking.

The idea is to use the well-known rüdew-like, blocking also for turnouts, in order to be able to block the concerned input in the ^{event of a disturbed 1 output or another disturbance at the arriving turnout.}

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

609 578/190

V 9207 VIIIal21a ³

off, because if a point output is faulty at a switch with: z. B. nine directions blocked the other eight non-disturbed outputs will. This disadvantage could be remedied, also for each individual direction in the arrival den and outgoing. Soft the well-known principle of reverse blocking is used. To do this, it would be necessary to transmit the reverse lock starting from the disturbed output the, corresponding, associated! First select the turnout entrance and; then to. lock.

The effort to be made here is, however, so considerable that the known rearward blocking In _{1 of} this form for turnouts is out of the question.

It is therefore ^{a matter of 1} to find a way, in the event of a fault in a turnout output, to block the corresponding turnout input with the least possible amount of switching means for an assignment. Converter-generated return pulse, which is longer than the other pulses used for signaling, controls switching means in the outgoing converter that block and! Initiate marking of the corresponding turnout input. As can be seen without further ado, this results in the search for the disturbed turnout input and the associated effort, in omission, since the turnout input and output are partly involved in the connection establishment anyway. The partially established connection is established in a known manner; then, triggered and: the subscriber receives a 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 drive in the same direction., the first dialing process as a result of the disturbed. Turnout exit of the former turnout could not be assigned !.

The idea of the invention is illustrated by means of an illustration in an exemplary embodiment,

The: Figure shows a relay arrangement ¹ 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. E ₃ , activated, then with the help of relay 3 and relay A ₁ on the incoming side of the switch output ¹ 3 is occupied. The necessary. Switching operations! should not be explained in more detail here, as they are for the, object! of the invention are not important

If the switch output T _{11 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 initiate the blocking and identification of the switch input 3. At the same time, this return pulse is evaluated as a busy pulse, ie the calling subscriber receives a busy signal.

The evaluation of the incoming on the long-distance line a / b. 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 ill: earth, contact II, HI, winding 1/6 of a relay R that has been energized up to that point, and the relay R fails after a certain amount of time due to the capacitor ¹ C. interruption. The capacitor C prevents; at the same time. R dropping out when the relay / is excited by other pulses arriving in the signal receiver, all ^{of which are 1} in length but shorter than the return pulse.

As soon as the relay R has dropped out, is; the circuit is closed: earth, rIIl2 contact, 3lIl2 contact, winding 2/1 of the 5 * /; 3 relays. The relay Sp 3 responds, blocks input 3 with its: contact sp 3II, triggers an alarm device ¹ via a contact not shown and is maintained via: earth, button T 3, contact sp 3III, winding 5/6 des Sp 3 relay.

Through 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 is triggered via switching means. Back pulse switches off. As a result, the / relay goes to the outgoing. Side back to its rest position; and the i? Relay is again excited via: earth, c 12 contact, rll contact, ill contact, winding 1/6 of the ^ relay. Contact r 11 closes and thus ensures that the remaining inputs can still be assigned. The input E 3 remains blocked. Repeat the same process; if other outputs of the incoming turnout are disturbed,

Once the reported fault has been rectified, the associated button T 3 is pressed and the Sp 3 relay is released and input 3 is released again,

Claims (2)

Patent claims: 1. Circuit arrangement for the blocking of turnout inputs in the case of disturbed turnout outputs in telephone systems, in which the turnouts are assigned to the converters ^! , characterized by the fact that a return pulse generated with the first assignment in the incoming converter, which is longer than the other pulses used for signaling, controls switching means (/, H) in the outgoing converter, which initiate the blocking and identification of the corresponding switch 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. 1 sheet of drawings 609 578 / 1W 7.56