DE323405C - Circuit arrangement for telephone systems with automatic dialers - Google Patents

Description

Circuit arrangement for telephone systems with automatic dialers. The invention relates to telephony systems in which. the connection via automatic voters are established, especially those where the calling ' Line first via selection or line finder with a connecting circuit is connected.

According to the invention, a simplification of such known circuit arrangements is intended can be achieved in that the preselectors or line searchers a device is attached, which is intended to be used in various tax activities in different Exercise connection levels.

In the drawing, for example, is a system with a semi-automatic Establishments shown schematically in which the invention is implemented. the Zeitnung and the following description, however, refer to the facilities and switching operations are limited, which are necessary for understanding the invention are.

Fig. I shows the scheme of a Unteranaes, which the calling TeilnQhffier is assigned to the position igg.

Fig. 2 contains the schematic representation for understanding apparatus of a main office essential to the invention. Besides the illustrated ones The switching devices for the headset are still located at this office the civil servant and the transmitter and register facilities. However, these apparatuses are meaningless to the essence of the present invention and therefore not in the scheme executed.

The apparatus used in the system are all of a known type.

The line # cloth when consisting essentially of the rotatably angeor "dneten brush carriage which moves from a drive magnet and is braked by a holding magnet. The brushes - stroke over fixed contacts, which are arranged in a semi-cylindrical contact field and connected to the incoming lines.

Sequence switches are used to create the control circuits. These devices consist of a vertical shaft on which cam disks are arranged - the contact springs depending on. open or close their position. The switches are driven by a constantly running shaft with which they are electromagnetically coupled.

It may now be assumed that a subscriber at the subscriber station igg requests a connection with another subscriber. The subscriber igg takes his receiver off the hook and thereby energizes his call relay 116 in the usual way. The relay pulls in its armature and thereby energizes a starting relay 1 17 for the group of call seekers who have access to the calling line. At the same time, it applies a certain potential to the test contacts 121 assigned to the subscriber line through # V resistors 141, 142, the relay 1 f 7 closes: via springs i o3 'and io4 circuits for the drive magnets of all the call seekers of the group dependent on this relay. The brush carriages of the free viewfinder therefore begin to run and their brushes 122 to 125] start via the contacts 118 to T21 of the connected lines, which of course are connected to the various viewfinders . the group are switched multiple times.

As long as the brushes 1 25 brush over contacts 1 2 1 of non-calling lines, i.e. 11. over those contacts where there is not a certain potential in the aforementioned way, the seekers set. their way away. But as soon as the brushes 125 of a seeker reach the contact 121 at which the certain potential is present, the test relay 1:26 of this seeker is energized, closing a parallel circuit via its second small-diameter winding and thereby reducing the potential at contact 121 SO that the test relay of another seeker, which later encounters the i2T contact, does not respond. The first-mentioned seeker, however, only comes to a standstill when its burner parts are set exactly to the contacts of the calling line and then the breaker 128 connected to your seeker breaks a line to earth, so that the test relay 127 excites via its left winding which is no longer short-circuited I will. This opens the circuit of the viewfinder drive magnet 150 and closes the circuit of the holding magnet 15 1. In the meantime, the brush carriage of the viewfinder stops with precisely set brushes. The test relay 1.27 also has a circuit via the contact spring 1 1 3 (top) of the sequence switch ioo, by means of which this 1. # 'Olgesclialter is moved from position i, the rest position, to the third position.

The sequence switch closes a contact as soon as it is in the 2nd position on the spring i i o, whereby the isolating relay 129 of the calling line receives power, so that it disconnects (read line relay as well as earth and battery from the subscriber line: * the line relay 116 and the starter relay 117 are de-energized, and by de-energization this relay will shut down all call seekers that are still in motion. Should of course If another call had been initiated in the meantime, 117 would not be de-energized -be, and the = used callers would continue on their way while still a calling line unaccompanied i5t.

The circuit for the Tfennrelais iizg is maintained until after the end of the conversation all devices on the relevant sub-equipment have returned to the rest position. Therefore, if the next switch leaves its 2nd position, the spring 1 o #) can be opened, fini to remove the test potential at the contact 1:21 again. The conduit may still not be occupied by another searcher, (la which the IllinsLellung a call viewfinder allow 'de potential as a result of the Aherregung has also been separated for Teilnehmerleitu ng associated line relay r16.

However, before the spring jog leaves its contact, the Reiais 127 is switched via spring iii above and over 11: 2 below to the calling partial Nebiner line and is kept excited up to the 6th position. provided that the circuit at the subscriber station remains closed. If, for example, the subscriber hangs up his receiver before the call is passed on, the irregularity of relay 127 will cause the sequential switch to switch beyond its 7th position to trigger the devices in Unteraint via spring 11-3 of the sequential switch.

The activity of the seekers in the main office, who are assigned to the connection line ending in contacts 233, 234, takes place in the same way as the activity of the seekers in the branch office as soon as the subscriber lifts his receiver. First the line relay 2731 is energized; This excites the Anlaßrelais23-2 and sets by the resistors 291, 29-, a selectable potential at the contact 236. All free the group finder who have access to this interconnector will - over circuits at # gOassen that on the follow-switch springs 209 (above) unil 2io (o13eii) of the respective seekers.

As the sticks run, the Fe- (lern: 237 to 24o mark the contacts -233 to 236, which are assigned to the relevant connection lines and are switched multiple times in the contact fields of the various Sucbers, until a gucher reaches the calling connection line. When this happens, his test relay 241 is energized and applies üin test potential to its contact 236 in the known manner.

The brushes continue on their way until after their precise setting on the contacts of the breaker: 243 opened - i and the test relay: 242 is excited, which opens the circuit via the force magnet: 250 and via spring 2o8 (top) of the sequence switch 2oo energizes the holding magnet 25 1, whereby the BürAten are stopped. 1 The relay: 242 drives the sequence switch --3oo out of the i. into the 5th position by closing a circuit using springs 2o8 above and 203 above. In the 2nd position, the isolating relay 24-, 4-energized and the Leitiiii-Srelais 23 i, and Aillaßrel.tis 23- are de-energized via spring 220. just like the corresponding relay iiii branch office.

. In the 3rd and 4th position of the 'Hattptalilt., - sequence switch, alternating current, which is indicated everywhere in the diagram by a circle, which includes a plus and minus sign at 1, each -? # - "5 (> 1) eii A corresponding earth connection is established at spring 224 ()]) ei 'to close the circuit for the alternating current. This current excites the alternating current relay 132 iiii Unteraint, since the strobe flows through the capacitor 134. 1) This AC has. enough. small Wechse 'lzalil and other electrical r, igeiischaften that he will not be heard by the calling party or that could interfere otherwise, should it pass through any Zufalt in connection with its 7nhörerleitung.

As a result of the excitation (las lZe'Iais 132 closes a circuit via the springs 1 14 (above) tilld r05 (above), through which the sequential switch ioo is inserted into the position 7. In the 6th position, the alternating drinking circuit in the main anit is now connected springs 22-t, -225 is reopened, it closes an equivalent circuit for relay 127 via spring i r4 below, P, uheköntakt of relay 132, 1-, eder io6, working contact of relay 1:27 and spring jo4 below, so (let the 'resetting of the apparatus in the branch office, which now only depends on the relay t27 , be practiced until the relay 132 Zttlf, 7eSCIIO-21 is energized again.

Ste11111197, in which the slave switch roo is idle, is its 1st) speaking, and in this the calling subscriber line is through-connected to the contacts 233, 234 of the 2nd engraver.

When the following dialer 2oo of the connecting electronic circuit gets into # its #q, position, the circuit of the calling subscriber is switched through to a t * transformer coil 246, and (learning the partial circuit is led by the suspended battery Stroin Yti. Although the contact 223 is now closed, the CI) er # \ - acliting.slainpC 263 will not light up because the monitoring relay 247 is energized.

There. the further establishment of the connection to the desired participant through the group and line voters for the being controlled by the Beartitin of the subject matter of the invention is irrelevant, a description of this Operations apart.

After the conversation is over, the participants hang their earphones on the hook again and thereby open the direct current paths via their Spreclistelleii. The calling subscriber thereby destroys the aberration of the C-berii, acliuiigsrelaiS 247, which lights up the ('beiwachungslan11) e 263. The requested subscriber causes the monitoring relay 248 to be deenergized in a self-explanatory manner, so that the # "berwtclitingsl- # tilil-) e; 2b4 is switched on.

# N, - when Beaihtiti sees this Lainpen light up, she knows, (let the separation be requested. She presses the release button 269 and thereby initiates the return of all devices to their rest position.

After leaving its 15th position, the next switch 2oo opens the circuit that existed until then for your first 7th weigamt via springs 224 and 225 (below). In its 16th position it applies alternating current to this circuit at spring 225 (top) tilid at spring: 224 (top) 1, "rcle. The relay 132 is energized ilticl opens the circuit of relay 1 27, which by dropping its armature the Sequence switch ioo drives from the 7th to the 8th position, which with this movement opens the circuit to the required participant on springs iji and 1 1 2 (above).

If the alternating current is disconnected from the connecting line to the first branch when the sequence switch 200 leaves its 16th position, the relay 132 is de-excited and closes a circuit via the spring 105 (below) Ulld 1 T4 (above), the brings the sequence switch i oo from position 8 via g. and to the 18th position and further into its rest position.

A description of the other switching processes that cause the apparatus to return to the rest position can be dispensed with, as they are of no significance for the essence of the present invention, and the only thing that mattered in the above-described disconnection processes was to show in which way the relay 127 arranged in the circuit according to the invention has an influence on the reset processes.

Claims (1)

PATENT CLAIMS: t. Circuit arrangement for telephone systems with automatic dialers for establishing the connection, in which the calling line is first connected to a prevention circuit via Vorm-ähler (line finder), characterized. that a relay (127) assigned to such a selector, which holds it in the position in which it reaches the calling line (test relay), simultaneously serves to bring about the return of the control devices of the switch to the rest position, if the calling line abandons the call before the connection is resumed. . 2. Arrangement according to claim i, characterized in that after forwarding the calling line the relay (127) ül) it can be influenced so that it is able to bring about the return of the control devices of the voter when the connection is disconnected in the rest position. 3. Arrangement nael) claims i and 2, characterized in that the relay l (i27) first brings the switch to rest in that position in which its brushes connect the calling line, that it then monitors facilities on the switch triggering it, in the event that the call is abandoned before the connection is fully established, and that it ultimately serves to return the control devices of the switch to the rest position when the connection is disconnected as a result of a change in the electrical state of the # connection line # with which the connection has been established.