DE886477C - Circuit arrangement for the identification and reproduction of switching orders with capacitors as identification elements, especially for telephone systems - Google Patents

Description

Circuit arrangement for the identification and reproduction of switching orders with capacitors as identification elements, in particular for telephone systems The invention relates to a device for identifying and displaying switching orders with capacitors as identification elements. Such facilities are in themselves in various designs for the identification and display of series of current impulses known. The identification and reproduction of the impulses or series of current impulses takes place on a purely electrical, purely mechanical or electromechanical basis.

The known, purely mechanical arrangements have the disadvantage that the storage and playback means used for this purpose, for example springs, Gears and stop pins require high accuracy and precise adjustment. The advantage of the mechanical devices is that they are relatively simple and crowded construction.

The purely electrical equipment requires in the previously known designs a great deal of effort, switching means. So will at facilities that use voters for both identification and reproduction work, a selector is required for each series of impulses. For other versions, which use relay chains for counting stored power surges during playback, A large number of relays are required for just a few series of impulses to be stored. In telecommunication systems in which up to ten series of current impulses are stored, is therefore at the known facilities of the storage and Reproduction of series of current impulses required effort practically almost prohibitively large. The advantage of the electrical versions over the mechanical ones lies in their greater operational safety.

The electromechanical devices show the advantages and disadvantages both systems.

A simplification of the purely electrical equipment was now through the use of capacitors as identification or storage elements achieved. In the known arrangements of this type, however, a certain amount still occurs Additional expenditure on switching means due to the fact that for testing the charged capacitors discharge tubes filled with gas can be used. In these arrangements controls the charging of the capacitors the grid of the discharge tube, which in turn again causes an anode relay to respond. These arrangements are now with respect to Grid control very sensitive and special switching means (switching arms) are required on the memory selectors to remove the unlabelled or charged capacitors to remove residual charges before carrying out the test process. Also will the charge one capacitor is not completely used to control the grid of the tube, as a result, harmful residual charges remain in the capacitors, which in turn easily Cause operational difficulties.

The device according to the invention, which is operated in a purely electrical manner works, has now compared to the known designs with identification capacitors the advantage of greater simplicity and operational reliability. - Special switch arms for the previous removal of residual charges, the unmarked capacitors are completely omitted, since discharge tubes are used to test the charged capacitors Not used. Nevertheless, a very quick and operationally reliable check is carried out of the charged capacitors, which is achieved by charging a of a given capacitor from a number of capacitors labeled Switching order is reproduced in that a polarized relay when one after the other taking place of the capacitors when it is connected to the charged one Capacitor is reset from its working position by the surge discharge, in which it was previously set by excitation in a local circuit.

Precisely because a polarized relay, which by a Local circuit is set in its working position without any difficulty can be designed in such a way that less to return it to the rest position Currents are required as to its setting in the working position that provides the polarized relay is a highly sensitive switching means; which then on responds to the discharge surges of the smallest capacitors. By the application according to the invention marked by polarized relays as test relays for checking the state of charge Capacitors can, therefore, not only have special switching arms on the stepping mechanisms to remove residual charges in the capacitors "but the Capacitors themselves can be kept very small.

The exemplary embodiment shows an arrangement in which two independently driven stepping mechanisms are used, the first of which is used for row-like setting and the second for row-like reproduction of the current impulses, and capacitors are assigned to each step which correspond to the step corresponding to the respective last current impulse of a current impulse series of the first stepping mechanism so that during playback the second stepping mechanism is influenced by a polarized relay, which has previously assumed a working position in a local circuit, so that the current surges are reproduced in the same number and in the same series. Advantageously, each stepping mechanism is assigned a contact bank with only two rows of contacts each - whose corresponding contacts are connected to each other in one row and whose corresponding contacts are connected to each other and to the capacitors for identifying the last surge of a series of pulses. The capacitors are charged at the end of each series of impulses. During playback, the capacitor is discharged via a polarized relay assigned to the second stepping mechanism as soon as the second stepping mechanism runs onto the step that is connected to the charged capacitor. Here, the polarized relay, which can easily be adjusted unneutral, works as a particularly sensitive relay, in that it has been brought into its working position beforehand via a local circuit, so that the capacities of the capacitors can be kept very small: Such a device works as follows : Through the pulses or series of impulses to be stored, one step-by-step switching mechanism, for example designed as a selector, is set in that its contact arms adjust to the contacts corresponding to the number of impulses in the series of impulses. At the end of the series of current impulses, a contact is used to charge a capacitor by means of certain switching measures. The same thing is repeated at the end of the second, third and further series of impulses. When playing through a. If a special signal is triggered, the second stepping mechanism, also preferably designed as a selector, is rotated until a contact on its contact bank is reached via a contact arm, which is connected to a capacitor which is characterized by charging during storage. The discharge of this capacitor causes the highly sensitive polarized relay to respond, which, through further switching measures, shuts down the second stepping mechanism for a short time. This marks the end of a series of impulses during playback. The reproduction or identification of the further series of current impulses takes place in the same way. At the end of the last series of impulses, the contact arms are on the same contacts, creating a special circuit that serves as a criterion for the rest position. -. The operation of the device, for example in a telephone system, is explained with reference to the drawing: The drawing shows the device in the rest position when there is no power. If the battery B is switched on, the K relay is excited via the following circuit: i. Battery B, winding KI, arm daII of the selector Da, arm de II of the selector De, earth.

Thecontrolled ki to kq. are opened. All other relays are not yet excited. The contact is closed. A. Storage A relay (not shown) located in the transformer Ue is excited by the current impulses sent by the calling subscriber and controls contact a, which feeds the current impulses to the coil De of the selector 2. Earth, contact a in the transformer LTe, relay winding VI and VII , Selector coil De, Battery B. The selector dial executes a number of steps corresponding to the number of impulses sent by the calling subscriber. The contact v2 short-circuits the winding VI, whereby the relay V is delayed on release. The armature of relay V is attracted for the entire duration of the series of current impulses. At the first pulse or at the first step of the selector, the contact arm de II of the selector moves from contact e II i to the following contact e 1I2. As a result, the relay K is de-energized. All contacts ki to k4 are closed again. Relay R is excited via contact ki: 3rd earth, contact da ?, contact P, contact lai, relay winding RI, battery B.

The relay R remains in the circuit earth via its contact v5, Contact xi, contact y5, contact ki, relay winding R I, battery B.

Contacts y2 and y3 switch over, relay P, which is designed as a polarized relay, is energized via 5th earth, winding KII, contact y2, relay winding P, contact r3, winding_RII, battery B. Relay P switches its armature , whereby contact P is opened. At the end of the series of impulses, for example after two pulses, if contact a remains open, the armature of relay V drops and contact vi closes. As a result of the two pulses, the arm deI of the selector is moved to contact e I 3, the arm de II to contact e 11 3 . The capacitor K03 is charged via the circuit 6. Earth, contact de 2, contact k3, contact vi, contact e I 3, capacitor K03, winding R II, battery B.

With the second series of impulses the relay V responds recently, the contact arms de I and de II of the selector De carry out a number of steps corresponding to the number of impulses in this series of impulses. At the end of the series of impulses, a capacitor is charged again. During the third and subsequent series of impulses, the contact arms of the selector switch are moved in the same way and the corresponding capacitors are charged. At the end of the election, as many capacitors are charged as the number selected contains digits. The selected digit is thus stored and the device remains in this state of storage until the counting is triggered by a control process. B. Playback The triggering of the playback of the series of current impulses is carried out by a relay S, not shown, whose contact s is closed. In the transformer Ue, the relay X is excited via the 7th negative pole of the power source, relay winding XI, relay winding XII, contact s, contact y2, contact v3, contact 1a2, earth.

The contact xi interrupts the circuit q .. The armature of the relay R drops out, the contact ri closes, whereby the relay J is excited via -8. Earth, contact da i, contact ri, contact k4, relay windings J II and J III, battery B.

The capacitor Ko is charged via the winding JI, so that the relay J is delayed on. The coil Da of the counting selector is excited via the contact i i: g. Earth, contact ii, selector coil Da, battery B. While the selector Da takes a step, its contact da i opens the circuit for relay J, which drops its armature, whereby the selector coil Da is de-energized. The relay J and the selector coil Da work as relay breakers, the step speed of the selector being determined by the electrical dimensions of the capacitor Ko and the windings of the relay J.

The relay X is held in the transformer Ue via its contact x: 2. The contact x 3 energizes the relay Y, whose contact y ?, the winding XII short-circuits. The armature of relay X drops out. Since the relay Y has a drop-out delay, its armature remains attracted as long as current surges. can be given via contact i 2. If the counting selector has reached the contact a13 with its arm daI, which is connected to the charged capacitor K03, then the capacitor K03 is discharged via the following circuit: io. Capacitor K03, contact a13, contact v3, relay winding P, contact y2, capacitorKo3. The armature of the relay P turns over, contact P closes, whereby the relay R is excited via ii. Earth, contact da2, contact P, contact ki, relay winding RI, battery B.

The relay R is held via 12th earth, contacts xi and yi in parallel, contact r5, contact ki, relay winding RI, battery B. The contacts y2 and y3 switch over, which means that the relay P is in the following circuit: 13th earth, Winding KII, contact y2, relay winding P, contact 73, winding RII, battery B. The armature of relay P is reset, whereby contact P opens. When relay R responds, contact vi is opened, so circuit 8 is interrupted. The selector stands still. No more pulses arrive on the pulse playback line. The relay YII is thus de-energized. The contact y2 is thereby switched over, the relay X is energized again in the circuit 7. The contact xi opens, whereby the circuit ii for the relay R is interrupted. This means that relay Y can respond again, since the short circuit through contact 7q. will be annulled. When the armature of relay R drops, relay J is also re-energized and the counting selector is set in motion. The second series of impulses is sent to line JW via contact i 2, and the selector rotates until the Arara da I reaches the next contact, which is connected to a charged capacitor. Then the relay P responds again and the same process is repeated. So there are as many series of current impulses on the pulse reproduction line JW as the contact arm daI of the counter meets contacts that are connected to charged capacitors.

In the last step of the last series of current impulses, the situation is correct the electoral arms daII and deII agree with each other again. The relay K is energized, the contacts ki to kq. are opened. The facility is then located in the Starting position for receiving a further series of series of current impulses.

From the above description it can be seen that the device according to the invention can in principle store and reproduce any number of series of current impulses. The total number of pulses to be stored depends only on the number of contacts in the contact bank. A contact bank with around 50 contacts is practically sufficient for storing nine-digit subscriber numbers, for example. The device also has the advantage that the rest position is not fixed as the starting position for a new storage, which has the effect that the switching mechanisms or selector do not have to be returned to a specific zero position by any further switching means and control processes. The position at the end of the last series of current impulses in a series of current impulses is also the starting position for the next series of current impulses.

Since the facility does not have a fixed rest position, you can continuously any series of current impulses can be stored or reproduced. In this case just take into account the number of stored in the facility Electricity surges must not be greater than the number of steps taken by the voters. It is also without further ado that the reproduced. Power surges according to duration and speed can be regulated within almost any limits. With this in mind, the establishment can also be used to correct the impulses at the same time.

Claims (7)

PATENT CLAIMS: i, circuit arrangement, in particular for telephone systems, for the identification and reproduction of switching orders, with capacitors as identification elements, characterized in that a, by charging a certain capacitor off a number of capacitors marked switching order thereby reproduced that a polarized relay (P) when tapping off one after the other. of the capacitors when connected to the charged capacitor through the Shock is reset from its working position, in which it was previously by excitation was set in a local circuit. 2. Circuit arrangement according to claim i, characterized in that when identifying and reproducing several switching orders the polarized relay (P) one after the other before the playback of each individual switching order in. -a local circuit in. its working position from which it is brought through the discharge current of the capacitors characterizing the switching orders one after the other is postponed. 3. Circuit arrangement according to claim i and ?, Characterized in that a stepping mechanism (De) is used to receive the switching orders, which charges a capacitor (Ko i, Ko52) for each switching order according to its adjustment and a second switching mechanism (Da) reproduces the switching orders by tapping the storage capacitors, the polarized relay (P) assigned to the second switching mechanism determining the termination of each switching order when a charged capacitor is found. ¢. Circuit arrangement according to claim i and 3, characterized in that the switching mechanisms, of which the first for row setting and the second for row playback is used by electrical surges, powered independently, and by each Step of the two switching mechanisms assigned capacitors, which correspond to the respective step of the first stepping mechanism corresponding to the last rush of a series of rushes mark, the second stepping mechanism by resetting during playback of the polarized relay is influenced from its working position so that the current surges are reproduced in the same number and in the same series. 5. Circuit arrangement according to claims i and q, characterized in that each switching mechanism has a contact bank with two rows of contacts each, whose corresponding contacts are assigned to each of the one Row with each other and their corresponding contacts each of the other row with each other and with the capacitors to identify the last rush of a series of rushes are connected. 6. Circuit arrangement according to claim i or claims 2 to 5, characterized in that the capacitors charged for identification over the polarized relay will be completely discharged. 7. Circuit arrangement according to claim i or claims 2 to 6, characterized in that the polarized relay (P), which is returned from its working position when switched on to a charged capacitor, an auxiliary relay (R1) energized when it is set in its rest position, which the polarized relay (P) switches on again in the local circuit to take up its working position when it responds. B. The circuit arrangement according to claim 7, characterized in that the auxiliary relay (RI) in its response, the abgreifende stepping mechanism (Da) shuts down. G. Circuit arrangement according to Claim 7, characterized in that the auxiliary relay (RI), after being excited by the polarized relay (P), is kept excited in a circuit controlled by delay switching means (X, Y i).