DE645615C - Circuit arrangement for counting connections in telephone systems, in particular with dialer operation - Google Patents

Description

The invention relates to a circuit arrangement for counting connections in Telephone systems, in particular with dialer operation, and relates in particular to such arrangements in which counting current surges on a test and blocking wire on the Counting circuit of the calling connection point are to be transmitted.

The invention consists in that counting current surges generated by a counting current surge transmitter via the blocking vein by temporarily interrupting the flow via this vein Current are transmitted to the circuit of the meter of the calling connection line and a drop in the test relay due to special aids (longer armature drop-out delay, Closure of a local holding circuit or both) is prevented.

The inventive arrangement ensures that the counting current impulses are transmitted properly guaranteed in any case, while with current amplification or with short circuit of the counting transmission devices under certain circumstances Operational difficulties can occur, for example their reason in the failure of a once actuated Have counting relays at the end of the counting current surge.

With particular advantage, the arrangement according to the invention can be of higher quality when counting Use connections in which the counter of the calling station influences several times during the call must become.

In the drawings, everything is omitted for an understanding of the present subject matter of the invention not absolutely necessary devices embodiments of the Invention shown. The mode of operation of the arrangement according to FIG. 1 is as follows:

The subscriber cancels the subscriber station Tn his handset, so the following circuit is closed for the call relay R: earth, winding II of the relay R, Contact 3 1, subscriber loop contact 2 1, winding I of the relay R, battery, earth. The relay R, which responds in this circuit, closes its contacts 7 r and 8r. While the test circuit is being prepared at contact 7 r, the following circuit is closed by closing contact 8 r for the rotary magnet DM of the preselector VW : earth, relay interrupter RU, rotary magnet DM, contacts 6t, 8r, battery, earth. The pre-selector VW equipped with five switching arms is started in this way and looks for a free following first group selector I. GW. If he has found one, the following circuit is closed: earth, battery, contact 7r, windings 6c lungs II and I of relay T, switching arm c of preselector VW, resistor Wi ₁ , winding I of relay C or contact τ τα, winding II of relay C, contact 10 k, earth. Tn

This circuit first responds to the relay T in the preselector, stops the preselector by opening contact 6 1 and shorts its high-resistance winding II on contact 5 1 , thus blocking the group selector found against other occupancy. The blocking circuit runs over: earth, battery, switching arm e of the preselector VW in position 1 to 10, contact S f, winding I of the relay T, switching arm c and further in the group selector, as mentioned before. By opening contacts 2 1 and 3 1 , the call relay is switched off and by closing contacts 1 1 and 4t, the voice line to the first group dialer is switched through. The consequence of this is the excitation of relays A and B in the group selector /. GW in the following way: earth, winding of relay A, switch arm α of preselector VW, contact 1 1, subscriber loop, contact 4i, switch arm b of preselector VW, winding of relay B in group selector /. GW, battery, earth. The relay A in the first group selector responds and opens its contacts ga, 11a and 20a. In the group selector /. GW had also been energized relay C, which among other things closes its contacts 12 c and 21 c. The relay C continues via its contact 12 c if the head contact 10 k is opened after the first stroke step of the group selector. The circuit for the lifting magnet H of the group selector 7. GW is prepared at contact 21c. If the subscriber sends out the first series of impulses, the loop interruption causes relay A to drop out intermittently. Corresponding to the number of interruptions in relay A , the solenoid receives current impulses by closing contact 20 α in the following way: earth, contacts 20 α, 2 ic, 23 w, winding I of relay V, solenoid H, battery, earth. In the above-mentioned circuit, the relay V also responds, which, as a result of the short-circuiting of its windings II and III through the contact 23 w , experiences a drop-out delay. The contact 18 ^ is therefore open during the series of impulses. If contact 20 σ remains open for a longer period of time after the series of impulses, relay V will bring its contacts to the rest position after a short time, so that the following circuit is established for rotary magnet D of the group selector via contact 17 k, which is closed after the first stroke step: Earth, battery, rotary magnet D, contacts iyk, 18 v, igp, earth. The rotary magnet turns the switching arms of the group selector to the first contact in the set decade. As a result, the shaft contact 23 w is opened, which cancels the short circuit for the windings II and III of the relay V, which had existed until then. The rotary magnet D continues to operate its contact 22 d and thus closes a circuit after opening the contact 23 w : earth, contact 22 d, windings II and I of the relay V, lifting magnet H, battery, earth. In this circuit, because of the upstream connection of the two windings I and II of the relay V, the lifting magnet cannot respond. The relay V is energized and opens the circuit for the rotary magnet D at the contact 18 ν . As a result, the contact 22 d is opened again and the relay V is de-energized. At contact i8z / the circuit for the rotary solenoid is closed again and the switching arms of the group selector are switched to the next contact. This interplay between the rotary magnet Ό and the relay V and thus the switching arms of the first group selector continues until the first group selector has found a free downstream connection device, for example a second group selector. If a free second group selector is found, the switch arm c of the first group selector /. GW the following by the contact 25 c pre-prepared test circuit is closed: earth contact 25c windings II and I of the relay P, winding of the meter relay Z, switch arm c of the first group selector I. GW, resistance Wi ₉ in the second group selector contact 27 x , Winding of relay C ₁ , head contact 29 k _v earth. In this circuit, the relays P and Z in the first group selector and the relay C ₁ in the second group selector respond. The relay P opens its contact ig ρ and thereby terminates the rotary movement of the first group selector. At the contacts 10 ρ and 11 p it switches the speech wires through to the second group selector. By closing the contact 26p , since the contact 25c remains closed, the high-resistance winding II of the relay P is short-circuited, whereby the free second group selector found is blocked against other occupancy in a known manner. The relay Z, which, as mentioned, was also energized in the above-mentioned circuit, closes its contact 132, among other things. As a result, a relatively slow-running counting interrupter ZU is switched on to the switching arm d of the preselector VW , so that the in the preselector on the switching arm d des Preselector ie the call counter GZ assigned to the subscriber Tn is incremented at certain time intervals. iao

From the following second group selector, only those parts are drawn that are for

the essence of the invention play a role. The relay C ₁ in the second group selector closes its contact 30 C ₁ and remains through this contact when the head contact 29A _{1 is} opened after the first stroke step. The current impulse series sent out for setting the second group selector and other subsequent connection units are in the first group selector /. GW transferred to contact 9 α . The solenoid of the second group selector is influenced by a contact from relay A ₁ . The circuit for relay A ₁ runs through: Earth in the first group selector

I. GW, contacts ga, 10 p, switching arm α of the first group selector GW, winding of relay A ₁ , battery, earth. The relay A ₁ receives current surges in this way and sets the second group selector // in a known manner. GW for a specific decade. The pulses from relay A ₁ are now effective not only on the lifting magnet but also on a follow-up mechanism DM ₁ , which sets a switching arm w to a specific contact in accordance with the series of current impulses sent. The switching circuit for the magnet of the follow-up mechanism runs via: earth, contact 31a, magnet of the follow-up mechanism DM ₁ , contacts (not shown), battery, earth.

A series of interrupters U is connected to the contacts of the contact bank swept by the switch arm of the follower. The interrupters are designed in such a way that each of them carries out a certain number of current closings or current openings during one revolution. Accordingly, the series of current impulses acting on the second group selector, which characterizes a certain traffic direction according to the number of pulses, switches on an interrupter U corresponding to this traffic direction. If, for example, the series of current impulses taking effect on the second group selector consists of three current impulses, the switching arm w is set to the third contact of the contact bank to which the interrupter U _{2 is} connected.

If the desired subscriber reports after the connection has been established, the feeder bridge relay of this subscriber is energized via the speech wires. In any known way, this feed bridge relay causes the relay Y in the second group selector to be excited via the lower voice wire. The relay Y closes its contact 32 y and thus the following circuit for the relay 6 ": earth, contact 32 y, winding of the relay S, battery, earth. The relay 5" closes its contact 33 s, so that when the breaker is switched on U ₂ makes contact, the relay X is energized in the following circuit: earth, contact 33 s, breaker U ₂ , contact 3, switching arm ze /, winding of relay 'X, battery, earth. The relay X is excited in this circuit, opens its contact 27 χ and closes its contact 28 x. When the contact 27 χ is opened, the blocking circuit running through the relays P and Z in the first group selector and C ₁ in the second group selector is therefore briefly opened each time the relay X is excited. The consequence of this is that the relay Z in the first group selector drops out and its contact 132 and thus the circuit for the call counter GZ of the calling subscriber opens. The relay P in the first group selector cannot drop out during the short contact openings at contact 27 λγ, since its second winding at contact 26 p was short-circuited and this delay the drop-out of this relay by a certain time. To further falling of the relay P during the temporary interruption of the blocking circuit to prevent, following a third winding of the relay P due to falling off of the relay Z on contact 142 holding circuit is concluded go: soil resistance Wi _4, winding III of RelaisP, Contacts 16c, i $ p, 14.2, resistance Wi _s , battery, earth.

Certain devices can cause the interrupter U in the second group selector to run synchronously with the counting interrupter ZU in the first group selector. In this way, during a contact closure of the counting interrupter ZU in the first group selector, the counting pulse is divided by the interrupter U in the second group selector, so that depending on the connection of a certain interrupter U in the second group selector //. GW instead of the one pulse from the counting interrupter ZU in the first group selector, by opening and closing the contact 132 accordingly, several counting pulses become effective on the call counter GZ of the calling subscriber.

The counting ends the moment the calling party hangs up his phone. Relay A in the first group selector drops out after the calling subscriber has given the final signal and short-circuits windings I and II of relay C at contact na . The relay C drops out after a short time and finally switches off at its contact 12c. Furthermore, the contact 24 c is closed and the contact 25 c is opened. The relays Z and P are brought to waste in this way.

The home circuit for the rotary magnet D is then closed via: earth contacts ig ρ, i8z ', 17ε, rotary magnet!), Battery, earth, the rotary magnet closes contact 22 d when it is excited and thereby excites relay V, which connects the switching circuit to Contact i8z <interrupts. So there is again an interplay between the rotary magnet D and the relay V, which lasts until the group selector is switched to the rest position and the contact 17 k is opened.

The triggering of the second group selector and the one assigned to this group selector Setup is also done in some known manner.

Are connections of low value, z. B. local connections established, the same are characterized in that ao the second series of current impulses, that is, the series of current impulses acting on the second group selector consists of a current impulse. The switching arm w is then switched to contact 1, to which no interrupter U is connected. In this case, the call counter GZ of the calling subscriber is only influenced by the counting interrupter ZU in the first group selector.

The embodiment according to FIG. 2 differs only slightly from that according to FIG. While in the arrangement shown in FIG. 1, the influencing of the call counter GZ after assignment of I. the first group selector GW following connection means, that the second group selector begins, the apparatus of FIG. Struck 2 so that the influence of the call counter GZ only begins after the called subscriber has reported. Since, by and large, the arrangements in the two figures show only minor differences, only the essentials will be described here.

The preselector VW is set in the same way as was mentioned in the description of FIG. The assignment of the first group selector and its setting also show no differences compared to the arrangement according to FIG. 1. In contrast to the arrangement according to FIG. 1, the first group selector is _{assigned a relay Z 1} which, as will be described shortly, is influenced via the lower speech artery. Furthermore, the connection of the call counter GZ to the counter breaker ZU is dependent on other contacts in addition to a contact of the relay Z.

Did the group selector /. GW a free one

second group selector //. GW found, the following circuit is created: Earth, contact 25 c, windings II and I of relay P, winding of relay Z, switching arm c of group selector I. GW, resistance Wi _e in group selector II. GW, contact 27 x, winding of the Relay C ₁ , contact 29 k _lt earth. The relay Z is dimensioned so that it cannot respond when both windings of the relay P are connected upstream. However, the relay P responds in this circuit and operates its contacts. The voice lines to the second group selector II. GW are switched through at contacts 10 p and 11 p. This creates the _{following circuit for relay Z 1} in the first group selector 7. GW : Earth, battery, winding of relay Z ₁ , contact \\ p, switching arm b of group selector I. GW, contact 47 P ₁ in group selector 7 /. GW, resistance Wi ₉ , earth. In this circuit, the relay Z ₁ responds, which opens its contacts 36 ^ ₁ and thereby prevents the influence of the counter GZ , which otherwise, since the relay Z after closing the contact 26 ρ and switching off the high-resistance winding II of the relay P excites and contact 362 was closed would occur.

Has the calling subscriber sent the second series of impulses for the purpose of setting the second group selector 77th GW , the impulses of which on contact 9 α to relay A _{1 of} the group selector 77th GW in the circuits: earth, contacts ga, iop, switching arm α of the first group selector 7 GW, contact 46 w (shaft contact, which is actuated after the first turning step of the group selector 77th GW ), winding of the relay ^, battery, earth are transmitted, the test relay P _{1 of} the second group selector 77. GW energized, which closes its contacts 48P ₁ and 49 ^ ₁ and thus switches through the speech wires to the line selector LW. At the same time, contact 47 ^ _{1 is} opened. The device can be made so that the contacts 48/4 and 49 p _{t are} already closed before the contact 47P _{1 is} opened. The excitation of relay Z ₁ is maintained in this way in the following circuit: earth, battery, winding of relay Z ₁ in the first group selector, contact up, switching arm b of group selector 7th GW, no contact 49 ^ ₁ in the second group selector II. GW , Switching arm b, "contact 503 ;, resistance Wi ₁₀ , earth. In this way, the activation of the call counter GZ is temporarily prevented. The contact 46 w is open after the first turning step on the part of the group selector 77. GW and the contact 23 w been closed, so that the now serving for adjustment of the line selector LW pulse iao rows as follows to the impulse relay A ₁ of the line selector LW be transmitted:

Earth, contacts ga, top, switching arm α of the group selector /. GW, contacts 23 w, 48 P ₁ , switching arm α of group selector II. GW, contact 403 / in the line selector LW, winding of relay A ₂ , battery, earth. The line selector is now set in a known manner and ringing current is sent to the desired subscriber.

If the desired subscriber answers, the following circuit is established: Earth, windings II and I of relay Y, contact 45 Pi (closed with contact 44 ^ ₂ when checking the line selector on the freely found subscriber), switch arm b of the line selector LW , Subscriber loop, switching arm α of the line selector LW, contacts 44 ^ 2, 42 y, 43 a ₂ , resistance Wi ₁₁ , battery, earth. In this circuit, the relay Y responds and opens its contacts 403 ;, 5031, 42 y and closes its contact 41 y. At contact 4031 the short circuit for the capacitor located in the upper voice wire is canceled. By closing the contact 413; (Drag contact) one point of the upper voice wire is closed, so that the supply current required for the calling point runs through relay ^ i ₂ on the one hand and relay Y on the other. By opening the contact 503; the circuit for relay Z ₁ in the first group selector /. GW open for the duration of the speech connection. The relay Z ₁ therefore drops out, closes its contact 36 ^ ₁ and in this way switches the call counter GZ to the counting breaker CLOSED. The call counter GZ is excited in the following circuits: earth, counter breaker CLOSED, contacts 37 ^, 35a, 36.%, 34C switching arm d of the preselector VW, call counter GZ, battery, earth.

Due to the interruptions caused by the counter breaker ZU , the counter of the calling subscriber is influenced in certain time segments during the duration of the call. The second group selector J /. GW can be designed in a manner similar to that shown in FIG. 1. An interrupter set U could therefore be provided and, depending on the code number that becomes effective on the second group selector II. GW, a specific interrupter can be switched on. Depending on the traffic direction and value, the pulse sent by the counting interrupter ZU can be transmitted by the respective connected interrupter in the group selector //. GW subdivided and in this way a different value offsetting of the fee take place.

Claims (3)

Patent claims: 1. Circuit arrangement for counting connections in telephone systems, especially with voter operation, in which a circuit to influence the meter runs over a blocking wire, characterized in that from a counting current impulse transmitter Generated counting current surges via the blocking wire due to temporary interruption of the current flowing through this wire to the circuit of the meter the calling connection line z. B. be transmitted with the help of a counting transmission relay (Z) -and a drop in the Test relay (P) by special aids (longer armature dropout delay, Closure of a local holding circuit or both) is prevented. 2. Circuit arrangement according to claim ι for counting different valued connections, characterized in that in a closed during the construction or upon completion of the connection counting circuit by the over the blocking wire depending on a downstream counting current impulse transmitter (U) according to the valence of the connection influenced counting transmission relay (Z ) additional counting current surges are generated. g ₀ 3. Circuit arrangement according to claims ι or 2, characterized in that the counter circuit to be influenced via a blocking wire by a when reporting the called subscriber. _{Counting relay (Z 1} ) influenced by a voice wire is closed in preparation. For this purpose 2 sheets of drawings