DE1227949B - Circuit arrangement for pulse-controlled counting and / or dialing relay chains in telecommunications, in particular telephone systems - Google Patents

Description

Circuit arrangement for pulse-controlled counting and / or dialing relay chains in telecommunications, in particular telephone systems Contact actuation and with a return magnet that is common to all armatures and mechanically resets them to their static or rest position according to German patent specification 1109 217 , in which when an armature is thrown into its working position on a control pulse, its own counter-excitation circuit is rendered ineffective and the counter-excitation circuit of the Relay chain downstream armature is prepared and in which a common capacitor is switched on in the counter-excitation circuits, which is the shedding of the downstream armature due to the time limitation of the actuation pulse derived from each control pulse ne working position prevented by the preparatory control impulse.

In a relay chain known from the German Auslegeschrift 1 021427 comprehensive field windings are used as relay armature contacts, in whose excitation circuits a common capacitor is in series, the capacity of which is dimensioned such that in the activated by one - in the effect of a control pulse, over all Protective tube contacts jointly assigned holding winding holding - protective tube contact of a relay, closed circuit, the relay downstream in the chain cannot be effectively energized during the duration of this control pulse.

Arbitrarily from each long duration control pulse is derived by the capacitor per an actuating pulse such minimum and maximum energy that it only a relay is actuated, but can not be effectively excited, the just prepared by its contact downstream relay during this control pulse.

So the capacitor has to be dimensioned in such a way that the through The charging current of the capacitor caused by the control pulse as a derived actuation pulse on the one hand, the prepared relay can safely excite, but on the other hand must the after the contact has been made, the charging current that continues to flow has already dropped so far, that the downstream relay only receives fault current when it is switched on.

It has already been proposed to expand these narrow tolerances in that the individual relays or armatures of the multi-armature stick-type relay known from German patent specification 1109 217 with inverse contact actuation and with an armature common for all actuated, mechanically move them into their static or rest position resetting reset magnets can be used. These multi-armature stick relays have the advantage in this application that a short actuation pulse applied to the individual counter excitation coil of an armature frees the armature from the static or rest position, so that it is independent of the further application of the control pulse or the by the force of a spring is transferred from this derived actuation pulse into the working position. The derived actuation pulse can therefore be formed so briefly in a known manner that when the working position is reached, in which the counter-excitation circuit of the downstream relay is already closed in preparation, the control actuation pulse has already subsided completely.

In this proposed arrangement, as in one of the known relay chains essentially corresponding to this, all relays operated one after the other during the cycle remain in their released working position and are only returned to the locked or idle position together after the relay chain has been completely traversed. Only the counter-excitation coil of an armature or relay is effectively connected to the common input for the control pulses. However, it appears disadvantageous in, phenomenon that the - by the dropped into position anchor - actuated individual contacts remain in their switching state, is carried out to the common return of all operated in their anchor adhesive or rest position. The interconnection of the stages of the relay chain to form a counting ring is therefore not easily possible .

In contrast, the arrangement according to the invention has the advantage that always only the contacts are each operated a single anchor. In a technical version with a multi-armature stick relay, the relay chain has twelve stages, with seven contacts for the control tasks of the relay chain being available as output contacts in each stage, so that the operation of a seven-armed selector with twelve separate outputs can correspond.

The invention is characterized in that the control pulses both the common reset magnet as well as the one assignment of the common capacitor are supplied, the other occupancy via one by the reset magnet activated contact and via the preparatory contact of the previous one in the relay chain Armature is connected to the counter excitation coil of the armature that has just been prepared, so that with each control pulse the Anchors thrown off in the working position are returned to the rest position by the reset magnet and the prepared armature by the actuation or charging current pulse of the capacitor is released from its rest position and transferred to a medium waiting position, from which he at the end of the resetting process of the previous armature passes into his working position (fallen away).

Each of the multi-armature relays mentioned is individually controllable Anchor connected to a card actuating the contacts. Everyone's cards in the Anchors that are in the rest position are outside the mechanical range of action of the reset magnet held. When moving an anchor into its fallen The job, however, learns the card connected to it, except for the one from the anchor movement Due to the change in position, a lateral deflection that puts them in the mechanical range of action of the reset magnet brings so that its armature bridge when actuated Capture the deflected card and return the card with the anchor to the detention or rest position can lead back.

In the invention, the reset magnet is used so that it does not only returns the card with anchor that is in the working position to the rest position, but also the transfer of someone else during its activity prepared anchor in its detention or rest position in its (fallen) Working position allowed. However, the anchor can be because the card is on its side Deflection is prevented by the actuated armature bridge of the reset magnet, to fall off completely, only after the return of the same its way into the working situation execute to the end.

The invention is illustrated with reference to FIG. 1 to 3 described.

F i g. 1 shows the basic circuit diagram of a relay chain according to the invention, in which a single stage is always actuated; F i g. 2 shows a relay chain with zero position, and FIG . 3 shows a relay diagram in FIG . 1 , the counter-excitation coils of the twelve armatures of a multi-armature stick relay are denoted by 1 to XII. For the own switching functions of the relay chain according to Fig . 1 in each case a two-pole contact Il is only required to j X1I1 each armature.

The multi-armature stick-on relay contains a reset magnet R and a contact r, which is closed during the excitation of the reset magnet before the working contacts 11 to XII1 of the card that is in the working position and which is detected by the reset armature is opened.

For example, let the twelfth armature be in its fallen working position, so that contact XII1 is closed. If a control pulse arrives at input A, B of the relay chain, the reset magnet R is excited and closes contact r. The capacitor Cd is charged via the contact XII1 and the counter-excitation coil I until the reset magnet has attracted so far that when the previously actuated twelfth armature is reset. Contact XIII is opened. The actuation or charging current pulse of the capacitor Cd caused the counter-excitation of the coil 1 of the first armature, so that this armature is released from the rest position and now durA the actuated reset armature bridge held in a middle waiting position halfway waiting for the termination of the control pulse and waiting for the associated drop in the return anchor bridge. Since the B # activity or charging current pulse of the capacitor Cd has ended, the coil II prepared by the contact 11 is not counter-excited, but only receives fault current via the resistor Rd. After the reset magnet has dropped, the contact r is opened again so that the capacitor Cd can discharge through the resistor Rd.

With the following control pulse, the reset magnet resets the first armature, and the coil 11 of the second armature is counter-excited by the charging current pulse of the capacitor Cd via the contact 11 , so that it drops into the working position after passing through the waiting position.

The relay chain according to FIG . 1 works as a ring counting chain, i.e. i.e. after going through all stages it automatically starts again with its starting position.

The in F i g. The relay chain shown in FIG. 2 differs from the one previously described in that it can be returned to the zero position by applying a reset pulse to a special input C, B , in which no armature is in the working position.

The control pulses to be counted are applied to their inputs A, B. The first control pulse excites the reset magnet R. This does not return any armature from the relay chain, which is in the zero position, to the rest position, but closes its contact r.

The counter-excitation coil I of the first armature receives a switch-off current pulse from the reset magnet R only at the end of the first control pulse via the diode Dl , so that the armature drops into the working position via the waiting position. The thereby closing contact II prepares the counter-excitation circuit of the second armature.

A multiple of contacts 12 to X112 is parallel to coil I, so that each actuated, fallen armature a further counter-excitation of the Kitchen sink I prevented. Each subsequent control pulse switches the relay chain by one Step further until the last (twelfth) coil prepared by contact XII XII drops the last anchor into its working position at the twelfth control pulse. This then prepares when it is reset on the thirteenth control pulse through its opening contact X112 the first armature, which is still during of the reset process, i.e. after the thirteenth control pulse, is thrown off and then drops over the waiting position into the working position.

If a reset pulse is given to the special input C, B in any switching state of the relay chain, the reset magnet R is actuated via the capacitor Co. The diode Dr prevents the counter-excitation of an armature II to XII. The armature I is also not triggered, since the slowly decaying charging current pulse of the capacitor Co prevents the formation of a switch-off current pulse.

Claims (2)

Claims: 1. Circuit arrangement for pulse-controlled counting and / or dialing relay chains in telecommunication systems, in particular telephone systems, in which each stage has an individual armature of a multi-armature stick-on relay with inverse contact actuation and with one that is common to all armatures and mechanically resets them to their static or rest position includes restoring magnet according to the German patent 1109 217, in which when winding throw an anchor in its operating position on a control impulse the own counter-excitation circuit disabled and the counter-excitation circuit of the downstream in the relay chain armature is prepared and in which a common capacitor is switched in the counter-excitation circuits , which prevents the throwing of the downstream armature into its working position by the control pulse preparing it by the time limit of the actuation pulse derived from each control pulse, characterized in that the control pulses to both the g A common reset magnet (R) as well as the one assignment of the common capacitor (Cd) are fed, the other assignment of which via a contact (r) actuated by the reset magnet and via the preparatory contact (XII1) of the armature preceding in the relay chain with the counter excitation coil (1 ) of the armature that has just been prepared is connected, so that with each control pulse the armature that was thrown into its working position during the previous control pulse is returned to its rest position by the reset magnet (R) and the prepared armature is moved out of its rest position by the actuation or charging current pulse of the capacitor (Cd) released and transferred to a mean waiting position, from which it changes to its working position (dropped out) at the end of the resetting process of the previous anchor. 2. Circuit arrangement according to claim 1, characterized in that a discharge resistor (Rd) is connected in parallel to the common capacitor (Cd). 3. Circuit arrangement according to claims 1 and 2, characterized in that a diode (Dr) is connected between the input (A) for the control pulses and the reset magnet (R), which enables the supply of a reset pulse via a capacitor (Co) to the Reset magnet (R) alone allows, so that the return of the relay chain is effected from any existing switching state into the zero position. 4. Circuit arrangement according to claim 1, characterized in that the counter-excitation coil (I) of the first armature is short-circuited by parallel-connected contacts (12 to XII2) of all armatures in their fallen working position and via a diode (D 1) with such polarity parallel to the reset magnet ( R) is switched so that the switch-off pulse generated at the reset magnet (R) at the end of the first control pulse causes the counter-excitation to throw the first armature into its working position. Considered publications: Deutsche Auslegeschriften Nr. 1 021427, 1063 212, 1109 217.