DE598395C - Circuit arrangement for line selectors with multiple connections, in which an auxiliary switch assigned to the line is started by occupying a multiple line - Google Patents

Description

The main patent 530 579 contains a circuit arrangement for automatic selection free lines from multiple connections in line selectors by means of an auxiliary switch, which the line selector of everything else for the operation of multiple lines required set-up effort relieved and even a simple additional Represents the facility for each Mehrfac'anschluss regardless of the The number of lines is available once, is added, removed or added at any time State of the number of multiple lines can be adjusted. This auxiliary switch of the individual Multiple connections are to specific multiple lines identified by collective numbers the line selector connected. When such a line is selected or occupied, the associated auxiliary switch incited to connect with the line selector looking for a connection, him to control a free line of the relevant multiple connection and then switch off again for other use. The distribution 'of the individual lines the multiple connection in the electoral multiple is not subject to any restriction. Prove this the two embodiments described in the main patent, in which the to lines belonging to a multiple connection in the contact field of the selector one after the other and the other time are assumed to be absent-minded.

The invention takes on the former case with successively connected Lines reference and aims to simplify the auxiliary switch device to a large extent by amalgamation or joint use of the same for several or for all multiple lines in a line selector group. The realization this idea is based on the similarity of the switching operations of the auxiliary switch in the handling of calls for various multiple lines in accordance with the former case, and also on the short-term Assignments of the auxiliary switch for the 'individual call and finally for the simple one Composition of the auxiliary switch that guarantees operational safety.

The known device of the auxiliary switch is subject to the intended joint

same utilization for several groups of multiple connections following the invention Changes.

In each case, the ^{common auxiliary switch is 1 started} via multiple lines with collective numbers with different numbers. Since the auxiliary switch can only handle one call after the other, it is necessary to keep it accessible for several ίο simultaneous calls. This is done by creating independent starting circuits. However, in order to avoid too great a cost of switching means, the independence of the handle circuits is limited to multiple lines that switch calls to multiple lines with an unequal number of lines. Since the auxiliary switch always has to generate a current impulse number that is just sufficient to switch the line selector further, a corresponding regulation of the current impulse number is required when calling multiple connections with an unequal number of lines. This is done by influencing the current impulse transmitter contained in the main patent (control switch II), which is dependent on the starting circuits. It is shown that the current impulse transmitter can take over the regulation of the current impulse number itself in a simple manner by setting the line selector prior to the advance switching of the line selector to the respectively occupied starting line.

The drawing shows the current flows of a line selector LW and an auxiliary switch HS designed according to the invention, which are delimited from one another by a dash-dotted line. For the line selector, as in the main patent, a design is assumed in which a switching element is first group-wise and then an individual selection of the lines by two step-by-step lifting by means of a switching magnet ti, after which an electromagnet S responding between the two selection processes Brush set of the desired management group has made effective:

The auxiliary switch differs in its composition from that in Fig. 2 of the main patent embodiment represented by the plurality of test and Änlasserlinien ö ⁹ , ö ³ , ö ² or C ?, c ^s , c ² , further by equipping the switch II with two contact arms II ¹ and II ² and by the introduction two relays G and P II and a resistor for each starter line. The control switch II has, as in the main patent, a zero position and as many working positions as in the maximum case unequal numbers of lines of multiple connections occur. The switch in the drawing has ten positions, of which the one marked ro is the rest position, which the switch assumes after each use. Note the return connection of the test and starter lines to switch II. To understand the same, it should be emphasized that lines b ^B and c ^{9 are} intended for multiple connections with nine lines, lines & ³ and c ³ for multiple connections with three lines, etc. are, so that the number of further steps, counted from the connection points of these lines, results in each case the number of current impulses required for the progression of the line selector. The branch lines 1 to 4 are arbitrarily connected to the other switch I with the contact ^{arms I 1} to I ^{4, as in the main patent.} The switch I has no zero position.

80 The dialer setting through

the participant

The line selector is connected to the subscriber station N through a call finder upstream of it. The per se known setting of the call finder takes place when the handset is hung up at the subscriber station. During the setting of the caller, the relay CI is energized by closing the contact χ and the contact ti is closed. If the call seeker then touches the subscriber's line, the relays V I and Γ respond in the circuit: -f-, lower winding of the relay V I, normally open contact c I ¹ , upper winding of the relay

V i, c arm of call finder, ti, relay T, -. While relay Γ keeps the -contact # closed, the relay VI short-circuits ^{its lower high-resistance winding with the operator contact-v I 1} , whereby the subscriber's line is blocked against further use. Relays R and A now respond in the line selector. Circuit for relay.R: -fy'vF, normally closed contact III ¹ , cV, relay ??, -. The relay /? keeps itself energized via its contact / " ¹ if a relay that responds after the caller has set its position to de-energize relay CI by opening contact χ. Circuit for relay A: -} -, middle winding of relay A, y I ³ , ö arm of the caller, loop line and apparatus of the subscriber N, ß arm, ν I ³ , upper winding of the relay A, -. The relay A opens the contact ß ¹ , before the normally closed contact c I ¹ closes, so that a From excitation of the relay

VI is avoided.

When the rotary dial is operated at the subscriber station, relay A is de-energized according to the loop interruptions and the lifting magnet // is energized by current surges. Circuit for magnet //; -j-.

ν P, r ² , α \ ρ P, //, - .. The magnet // lifts the switching element of the line selector by one step with each excitation. In the first stroke step, the switching element closes a further contact w and the head contact k ¹ . Closing both contacts initially has no effect. In the circuit of contact. »', Contact ή is already open, while that in the circuit of contact k ¹

ίο lying relay V II can only respond with a delay due to the opposing windings and the upstream throttle Dr and is therefore only excited when relay A remains excited for some time after the end of the first series of impulses. After the first series of impulses in the circuit: -j-, ν I ² , r \ make contact a ² , Dr, k ¹ , relay V II, - relay VII energizes the electromagnet S and the relay V III in the. Circuits: -j-, ν I ² , S / normally open contact. ν IP, r ³ , normally closed contact ν IIP, upper winding, of the relay V III, -. The electromagnet S makes the brush set a '.

'-. b ', d of the desired line group effective. The relay VIII switches on its lower high-resistance winding by switching the contact ν IIP, whereupon the electromagnet S becomes ineffective again.

■■: At the first rush of the second rush series coming about via the subscriber loop and the relay A , the relays V II and R drop out. But the feelings of the two relays are w for the circuit with the overrun Contact ineffective because the ν about his work contact IIP and the normally closed contact V IP still excited relay V ν III keeps the contact open * III.

The circuit for the solenoid H "remains

. closed via ν IIP, so that the magnet responds again to each current surge occurring via relay A and sets the brush set a ', b', c ' to the desired line. After the second series of impulses

■ the relay V II responds again and switches off the relay V III with the normally closed contact ν IP. This relay is delayed so that its fall occurs slowly after the relay V II is already energized. Meanwhile is

:: The following test circuit is closed: -j-, ν Ρ, ιΊΡ, normally open contact ν III ¹ , both windings of the test relay P I, y ¹ , cf arm.

The forwarding of the
"'Selector through the auxiliary switch 55

Assume that the line selector is from the subscriber to the group number 31 of a multiple connection to which the multiple. contacts 32 to 34 belong to three lines, has been set, the aforementioned test circuit continues via c ³ , resistance Wi ³ , starting relay C II, -. The relays P I and CII respond. The relay P I blocks the starting line of the multiple connections with three lines by short-circuiting its high-resistance winding. The relay C II concludes with ClI the "circuit for the relay U: - (- ,, £ II, closed contacts g ¹ and w ^1, D II, D I, relay U, - the relay U concludes with ti ¹ the circuit. of the rotary magnet D II (for the control switch II), which opens the circuit for the relay U with d II, whereupon first the relay U and then the magnet D II drops. The excitations of the relay U and magnet D II repeat themselves, see above that the magneto II advances the contact arms ^{II 1} and IP from the rest position shown until when the line c ^{s is} touched the test relay Pll connected in parallel to the resistor te ³ in the above test circuit responds and with ρ II ¹ instead of the rotary magnet D II Rotary solenoid en D I switches on.

: The contact arms II ¹ , IP remain on the lines b ³ and c ^{3 for the time} being, while the contact ^{arms I 1} to I ⁴ are now switched to the connecting line selector LW, which started the auxiliary switch on the line c ³ has to discontinue. So that the correct line selector is found by the auxiliary switch when calls are made via other starting lines at the same time, the test circuit relevant for setting the contact arms I ¹ to I ^{4 is also} routed via a contact arm II ^{1 of} the other switch. In this case, however, it can happen that, as is otherwise the case with call searcher circuits, an incentive that comes in later is dealt with earlier. If a line selector occupies the line b ⁹ , c ⁹ before the selector II has overflowed these contacts in order to find the contacts b ³ , c ^% that was occupied first, then the shutdown of the selector II takes place on the contacts b ^s , c ^s , and the The line selector shown must wait until the auxiliary switch is free again. An incorrect setting of the line selector cannot occur here, since the line selector is also checked in the aforementioned individual test circuit by means of an independent power source. The line selector is also checked by means of an independent power source, consisting of an alternating current transformer Tr, the primary circuit of which has already been closed by the relay Pll through ρ IP. If, therefore, the contact ^{arms I 1} to I ⁴ reach the branch lines 1 to 4 of the line selector LW when they are switched on, the AC relay W responds via the following test circuit: Tr, W, II ¹ , b ^s , b'-arm,

Right contact ρ Ι ³ , ι, V-, Tr. The relay W switches the rotary magnet en D I off with iv ¹ and the relay G on. This includes mitg ¹ a holding circuit for itself relay via the closed already with the first Seihritt the switch Il ^ cam contact II ^{9 "1} and switched on by g ^3, the test T ³ II from. Thus, when the contact opens not ρ II ^2, the relay W drops , This has secured its further excitation by the self-contact W ^3. The setting of the switches I and II forms the prelude to the next stepping of the line selector. First, the selector is ^{disconnected from the lines ö 3} , C ^3. This is done by short-circuiting the Relay PI at W ^4. Now, as a result of the opening of the right contact ρ F, the relay W also drops out, and the relay U and the magnet D II are again excited in a reciprocal interplay as before. The magnet D II switches the contact arms II ¹ and IP from the last position assumed b ³ , c ³ on until after three times the excitation of the magnet D II, the circuit of the relay U and the magnet D II at the continuation contact II ⁹ " ^{1 is} interrupted and the Switch II is hereby stopped in its initial position. The relay G is also ^{switched off and de-energized by the contact II 9} " ^1. The relay C II has already dropped out when the line selector is disconnected. This ends the activity of the auxiliary switch for the call in question.

The switch II acted as a current impulse transmitter for the line selector during the aforementioned continuation. When relay W responded, relay V II had already been energized for the duration of the continuation of the current: ~ \ -, if ² , I ² , 2, k \ VIl, -. This was done in order to open the contact ν II ¹ before the contact ρ I ² closes when the relay P I drops out. Each time switch II continues, the relay U transmits a current impulse: - \ -, g ² , υ ³ , I ³ , 3, ρ P, H ₃ - to the solenoid //. The magnet switches the line selector step-by-step to the multiple lines following starter line No. 31. As soon as the office set a ', b', c ' finds one of these lines free, the test relay P I responds again: - (-, g ⁴ =, I ⁴ , 4, both windings of the relay P I, y ¹ , e '-Arm, not shown c-core of the relevant multiple line, etc., -. The relay P I stops the line selector by interrupting the circuit for the lifting magnet H at ρ P, blocks the occupied line by short-circuiting its high-resistance winding with ρ I ¹ , sends out ringing current by closing the contacts ρ I ³ and ringing current by closing the contact ρ I ^4. The subsequent switching operations in the line selector are known.

If all multiple lines of collective number3i are busy, the line selector is triggered after reaching the last line number 34. The tripping is initiated by the interruption of the current for the relay V II at contact | f ² after the relay P I has not responded. As the contact ν II ¹ closes, the solenoid receives current surges: -J-, breaker, ή, q ³ , ν III ⁴ , ν II ¹ , closed continued contact w, ρ P, H, -. The line selector is switched to the end of "its path, whereupon the contact w opens and the selector falls back into the rest position due to its own weight. The calling subscriber receives through the closed head contact k? A busy time, which causes him to hang up the receiver, whereupon the known triggering of the call searcher and release of the line selector succeeds.

If a second call arrives on the same line while the call initiated via line c ^{3 is being processed} , it can be accepted as soon as the line selector calling first has been disconnected from lines b ³ , c ³ . In the previous short time, however, a second call would find the line busy. In contrast, any other line, e.g. B. b ⁹ , c ⁹ , a call can be placed at the same time, since the switched-on resistors in the lines, e.g. B. VW ³ , ensure sufficient independence of the starting circuits. With the rapid handling of the individual calls through the auxiliary switch, a congestion of calls is not to be expected. As long as there are unfinished calls, the starting relay CII remains continuously energized, as a result of which the auxiliary switch that becomes free for one call is immediately restarted for another call. X05

Claims (7)

Patent claims: i. 'Circuit arrangement for line selector with multiple connections, in which according to patent 530 579 by occupying one under one. Sarnmel number. selectable multiple line one assigned to the line Auxiliary switch is started to connect to the line selector searching for connection, the same on to advance one of the following lines and then switch off again, characterized in that the Auxiliary holder by tempering via Viel- iao Fachleitungeri with different numbered ·. Multiple calls to multiple numbers Groups of multiple connections mediated. 2. Circuit arrangement according to claim i, characterized in that the Independent multiple lines that can be selected under various collective numbers Form starting circuits .. 3. Circuit arrangement according to claim 2, characterized in that the Independence of the starting circuits is limited to trunks that make calls mediate to multiple connections with unequal number of lines :. 4. Circuit arrangement according to claim 3, characterized in that a Current impulse transmitter of the auxiliary switch provided for switching the line selector forward is subject to the influence of the independent starting circuits in such a way that it is one to the. Driving over the multiple lines produces a sufficient number of impulses. 5. Circuit arrangement according to claim 4, characterized in that the Impulse transmitter the number of impulses required to switch the line selector regulates itself by allocating a more or less large part of a number of current impulses that is sufficient for the maximum requirement a setting prior to the forwarding of the line selector to an occupied call line is used up. 6. Circuit arrangement according to claim 5, characterized by the interaction a surge transmitter (DII) and a connection selector (D I) in the auxiliary switch in such a way that when a starting circuit becomes effective themselves! first the rush current sends to an occupied starting line and then the four-bond selector sets the line selector searching for a connection, whereupon the impulse transmitter under the outside environment of impulses on the line selector returns to the initial position (by moving forward or backward). 7. Circuit arrangement according to claim 6, characterized in that the test circuit relevant for the setting of the connection ^{selector (DI) both via a contact arm (I 1} ) of the connection selector .als also via a contact arm (II ¹ ) of the previously set impulse transmitter (DII ) runs. 1 sheet of drawings