DE133636C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

CLASS 21 «.

Call counter circuit for telephone stations.

Patented in the German Empire on January 16, 1902. Longest duration: December 4, 1915.

The present invention relates to an improved embodiment of the main patent 124253 protected call counter circuit for counting the number of participants desired and established connections, the meter by the official of the switching office in the manner is advanced that the same when the connection is established or also when answering of the call on the part of the called subscriber a special one for the one in use taken cord pairs belonging push button button or this one Electricity circuit in direct connection with others necessary for a connection Handles.

The present invention now aims to provide increased security for such call counters for a proper progression of the counter and achieves this by placing a signal visible to the officer, ζ. Β. a light bulb, which must light up every time the counter is incremented when the Push button has actually taken place. So this lighting is granted to the officer the certainty that the length of time in which he depresses the push button and which when putting meters into operation because of the relatively great complexity of the Mechanism for a relatively long time has been sufficient for perfect indexing is.

In the accompanying drawing, the relevant parts of the circuit described in the main patent are listed again with the addition of the special features of the present invention. Fig. 1 shows subscriber station A connected to office B , while Fig. 2 shows half of a plug line used to connect two subscriber lines. 3 illustrates a particular embodiment of the invention.

In general it should be mentioned here that the system illustrated is that of the central battery is in which the calls as well as closing characters are automatically picked up and Hanging the subscriber handset on the subscriber switch hook while the microphones of the participant stations are fed directly from the battery in the office. The arrangement as well The effect of the individual parts of the system is described here again as far as necessary.

In the subscriber station the line is normally connected via an alternating current bell G ² and a condenser C ² , which prevents the flow of direct current, but allows the alternating currents sent by the office to sound the bell. By picking up the handset H ² from

Hook U ² closes the contact of the hook, whereby battery B ² from the office has a current path via call relay J? ³ , which finds the subscriber line, microphone M ² , subscriber handset H ² and back to the second pole of the call battery B ² , whereby the relay R ^{3 is} energized, its contact closes and the call lamp L ² lights up. The official now plugs the latch K ² with the interrogation plug S ^{2 in} order to receive the wishes of the participant. When the plug is plugged, current flows from battery B ³ via resistor W ³ , line 42, monitoring lamp Z, ⁴ , plug body S ² , jack socket k ²ⁱ through isolating relay R-; Line 3 to earth and battery B ³ , whereby the separation relay R ^{2 is} energized, attracts its armature and thus separates the two contacts in the subscriber line. As a result, on the one hand, earth and, on the other hand, the call relay R ^{3 is} switched off from the subscriber line. The current for feeding the microphone Ai ² is now fed to the latter from the battery B ³ as follows: Via the plug line and latch spring k ² ' ² to the participant station and back via latch spring & ²³ , as well as monitoring relay i? ⁴ to battery B ³ . The contact of the latter is regulated in such a way that when the switching hook U ² closes the relay, the relay i? ⁴ energized and the contact is closed, while in the event of an interruption on the switching hook U ² relay JR ^{4 is} de-energized and its contact opens. By opening and closing this contact, a shunt resistor to the monitoring lamp L ^{4 is switched} off and on, whereby the latter lights up or goes out, as already stated in the earlier patent specification. .

The main winding ^{22 of} the subscriber counter Z ' ^{2 is} connected in parallel to the separation relay R ² , the latter having a relatively high resistance, so that the armature of the counter at the normal current, which is between i? ² and Z ² would not be attracted. Once the officer has made the desired connection, the electromagnetic counter is switched on in such a way that, by pressing the button T ' ^2, the low resistance signal lamp L ^{3 is switched} parallel to the monitoring lamp L ⁴ and resistance W ³ , whereby sufficient current of the battery B ³ via this new circuit through the lines 42, 52, lamp L ³ , button T ² , lines 52, 42, interrogation plug S ² , jack socket k ²ⁱ , the main winding ^ ^{22 of} the counter electromagnet Z ² , line 3, ground and Battery B ³ finds its way back to attract the armature of the counter electromagnet and to close the contact of the same. Until the armature of the counter electromagnet Z ² is attracted, the current that finds its way through the lamp L ³ via the parallel windings r ²² and ^ ²² is not sufficient to make it glow. However, as soon as the contact of the counter electromagnet Z ^{2 is} closed, creating a second winding ^ ²³ of low. Resistance is connected parallel to the main winding, this results in a sufficient reduction in the resistance from the pawl test sleeve k ²ⁱ to earth and battery B ³ , so that the one flowing through the lamp L ³ and extending over the three windings r ²² , ^ ²² and ^ ²³ dividing current is sufficient to make the lamp L ³ shine.

It should also be mentioned here that the secondary winding ²³ is arranged on the core of the counter electromagnet in such a way that, when energized, it supports the action of the main winding, which is essential to ensure that the armature is securely tightened when the counter resistance increases, if 4 up to 5 counting disks can be adjusted.

As can be seen from the description, the various resistances in question are chosen so that the lamp L ³ does not glow until the counter armature has actually been tightened, so that the. Serving officials know with certainty that when the signal lamp is lit, the counter has actually been switched on.

An extension of this principle is shown in Fig. 3, in which, however, instead of the signal lamp L ^3, an electromagnetic counter Z ³ common to all strings of the workplace is arranged, which sums up the total number of counts made at this workplace and thus a total picture of those developed by the official Activity. This counter receives a contact at the armature, which is normally open, but is closed when the counter armature is pulled and then lights up ^{the lamp Z 5.} There is a conditional effect of the devices, in that the effect of one device depends on the one that has already been completed, since the signal lamp Z, ⁵ only lights up when the workplace counter Z ^{3 has} already attracted its armature and thus the electromagnetic counter ^{Z 2 is} advanced is, while the latter has only received enough current for this purpose when the secondary ^{loop winding £ 23 has} been closed to the main winding ^ ²² , ie when the counter Z " ^{2 has been} properly advanced.

Claims (1)

Patent claims: ■
ι. Call counter circuit of the type protected by the main patent 124253, characterized by that in order to ensure the proper forwarding of the counter on the main winding of the counting electromagnet of relatively high resistance a second winding of relatively low resistance is arranged, which is usually is open, but connected in parallel to the first winding when the counter armature is tightened is, whereby the effect of the main winding is supported and at the same time a sufficient reduction of the Resistance of the counter circuit is caused to a signal switched on in this on the central office To take action. Circuit according to Claim i, characterized in that, instead of the signal, a workstation counter is switched on in the counter circuit on the exchange, which counter is activated when the additional winding of the other counter is switched on.
Circuit according to Claims 1 and 2, characterized in that the workstation counter causes the signal to be switched on in the switching office. 1 sheet of drawings.