DE222538C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

of company management.

The invention relates to circuit arrangements for connection apparatus to Serving company managements for specific workplaces.

The invention provides a solution to the known problem, that of connecting two participants the same company management to make the necessary handling the same, needed for an ordinary connection. According to the invention this Purpose in every connecting organ, i.e. every string system, on the side of the interrogation plug a pawl built in for the connecting plug.

If the plug is put into this jack, its speech wires are connected to the same subscriber line switched to which the speech wires of the interrogation plug are already connected. The calling of the second participant can now over the wires of the connecting plug exactly in the usual way, so in particular can be made using the speech switch. The manipulations for making a connection between two Participants on the same line are exactly the same as with two normal participants. In order to allow the final signaling to take place in the same way as with ordinary ones Connections, according to the invention, such a switchover also takes place when the connecting plug is inserted into the pawl the tail lamps instead that both depend on the state of the same subscriber line be made so that both light up at the same time when the two participants their Have hooked up the receiver and the line has become de-energized.

The drawing shows two exemplary embodiments of the invention. Fig. 1 shows an application form for two-wire long-distance telephone exchanges.

If a participant N ₁ the company line G called the office in the usual manner and is queried for inserting the query plug ^ 4S in the query jack AK, so put the official, if the calling subscriber _N1 connection with a computer connected to the same trunk line extension subscriber N ₂ requires the connecting plug VS in a pawl Kl, which is assigned to each connecting device. By inserting the plug, the «-wire of the connecting plug VS is placed over the α-wire of the interrogation plug to the α-branch of the subscriber line, as is the δ-wire of the connecting plug to the δ-branch of the subscriber line. Devices lying further on the wires of the interrogation plug AS are disconnected at the same time. The calling of the subscriber N ₂ now takes place via the wires of the connecting plug exactly in the usual way by turning the speech switch SpU in the direction of the arrow in the figure, whereby the calling machine RM is switched on. The subscriber is also selected in a known manner by supplying current in a certain direction, certain frequency or the like via the wires of the connecting plug by means not shown in the drawing.

When plugging in the VS plug, the

Claims (2)

opening a contact k of the pawl Kl the end signal relay SR1 lying on the α-wire of the interrogation plug is switched off, while at the same time the end relay SR2 belonging to the connecting plug is switched on. In order to be able to use the final sign SZ-i belonging to the relay SR1 for signaling and thereby make the signaling of a normal connection equal to ίο, when the plug is plugged in via a jack contact m parallel to the final signal lamp SL2, it is connected to the break contact of the switching armature of the Relay SR2 switched. Both tail lamps light up at the same time when the tail relay SR2 drops its anchor, and this happens when the feed current flow over the subscriber line is interrupted due to the hooking of the listener at both stations, because the feed current flow over the branches of the line G only stops when the handset is attached to both extensions N1 N2. Fig. 2 shows an embodiment of the invention for three-wire connecting organs in which the speech wires do not carry a feed current. When plugging the plug VS into the jack Kl, its speech wires are also placed on the branches of the subscriber line via the speech wires of the interrogation plug AS, and the calling takes place in the manner described above. Since here the final signs are in the c-cores of the plug, one of them must be made dependent on the other. In the embodiment shown, this is done by means of a differential relay DR, whose one winding ι in series with the final symbol SL1 is in the c-wire of the interrogation plug AS, while the second, 2, via a contact η of the pawl Kl for closed when the plug is inserted the duration of the connection is switched on. As long as a subscriber of the line draws supply current, the end sign SL1 and thus the winding 1 of the relay DR which is in series with it has little or no current flowing through it. In the circuit shown, for. B. the call relay AR attracted its armature 3 as long as supply current is drawn on the line, and as a result, the high-resistance winding 4 of an auxiliary relay HR is connected in series with winding ι of DR and with the lamp SL1, so that 'only weak current the circuit flows through. The winding 2 of the relay DR receives a current from the battery via a resistor 5 and the contact η to earth, through which it excites DR despite the counteraction of winding 1, so that it attracts its armature and the circuit of the lamp SL2, which is from the battery is routed to earth via the c line of the connecting plug VS, the jack socket of Kl, via a resistor w and the break contact of the switching armature of the relay DR. If, however, both subscribers hang on to their listeners, then with the lamp SL1 also the relay winding 1, in the case shown as a result of the short-circuiting of the winding 4 of the auxiliary relay HR, is amplified by the falling armature 3 of the call relay AR.Now the effects of the windings are lifted ι and 2 .des relay DR, which now drops its anchor and thus also causes the tail lamp SL2 to light up. "75 Of course, the contacts of the latch can be replaced, for example by the arrangement of a relay, which, with its switching armature, causes the corresponding contacts which, according to the above, occur when the plug is inserted. Godfather NT-A ν Proverbs: 1. Circuit arrangement for connection devices at workplaces for the operation of company lines, characterized in that a latch (Kl) is built into the connection device on the interrogation plug side in such a way that by plugging the connection plug (VS) into this the on the speech wires of the interrogation plug (AS) Lying subscriber line (G) is connected to the speech wires of the connecting plug via the interrogation latch, for the known purpose of making the handling required for connecting two subscribers on the same line the same as those required for normal connections. 10.0 2. Circuit arrangement according to claim 1, characterized in that when the connecting plug (VS) is inserted into the pawl (Kl) via the contacts of the latter, such a switchover of the final characters or relays is effected that both final characters are brought in as a function of the subscriber line, for the purpose of getting both tail lamps (SL ₁ SL ₂ ) to light up when the call ends, as with normal connections, without sacrificing safety in the operation of the relays for the final signaling or the brightness of the signal lamps. 1 sheet of drawings.