DE194866C - - Google Patents

Description

3ίa'i4ez. (\ C§cn cPc & ca ι Ι'αι η la.

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

- M 194866 CLASS 21 «. GROUP

SIEMENS & HALSKE AKT.-GES. in Berlin.

Patented in the German Empire on May 4, 1906.

The invention relates to a circuit for call counters in telephone exchanges, in which the incrementing of the counter belonging to the calling subscriber is carried out by a current flow via the contact one of the called subscriber dependent electromagnet, which at the same time can serve to give the final signal, is closed when this electromagnet

ίο by one when removing or attaching of the handset on the called subscriber station closed current is excited. At a such an arrangement is maintained while maintaining the supply current and the final signaling of the called subscriber, the counter is also incremented if a Counting the conversation is not desired or is not permitted, such as B. during business calls. Because there the flowing over the called place, for eating or for giving the final signal The current used for counting always runs through the relay used for counting, the same is used for each speech connection Counter electromagnet energizing current closed.

The present invention has the purpose, in call counter circuits, of the aforesaid Art to prevent the counter from being incremented in all cases in which a count should not take place, and that is according to the invention using the also pair of plugs used for calls to be counted achieved without compromising security the final signaling and feeding of the called station is endangered. The invention is characterized by the fact that when the calling party connects with certain Lines kept open the path of the current exciting the counter electromagnet by the special arrangement of these lines that the closing of the Counter current in ordinary connections causing devices ineffective be brought without thereby giving the final signal or feeding the called Subscriber site is affected. This can e.g. B. in arrangements in which the Meter current is closed by the armature contact of an electromagnet, which is connected to the plug line on which the end signal electromagnet does not happen in such a way that the current flowing through the said electromagnet when inserting the connecting plug into normal subscriber jacks and when the call is received flows at Connection to certain lines locked by devices located in them is, but z. B. ensured by earthing the line at a suitable point is that the current used for the final signaling or supply can flow unhindered. Another solution to the problem consists in that in the way of the current exciting the counter electromagnet in addition to the contacts on the mentioned, from Another contact is provided for the called subscriber dependent electromagnet is. which is open when the calling subscriber connects to certain lines is held, in the case of ordinary connections it is closed, so that depending on its

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Position a count takes place or does not take place. Is this second contact in the idle state z. B. opened, it can be locked by locking its electromagnet at ordinary Connections flowing through the current can be achieved in the manner described above, if necessary remains open. On the other hand, if the contact is closed in the idle state, then

ίο he according to the invention when connecting the calling subscriber with certain lines opened by being at ordinary Connections of currentless Elektro'magnet by one according to the special arrangement These lines are energized with the current switched on.

Two exemplary embodiments of the subject matter of the invention are illustrated schematically in the drawing, omitting all details that are not essential here. 1 shows the circuit of two subscribers T ₁ and T ₂ connected to office A , of which T _{1 is} the calling subscriber. Fig. 2 is an arrangement of the plug cord device and the service center o.

The mode of operation of the arrangement according to Fig. Ι and 2 is as follows: If subscriber T ₁ , who calls office A using his call sign V ₁ , W ₁ , wants to be connected to another subscriber T ₂ , the liaison officer, who after the Call has inserted the plug 0 in the interrogation jack m , the connection plug ρ in one of the multiple _{jacks Ar 2 of} the desired subscriber. If he then picks up his receiver after the call , the current flowing from the battery B ₀ via the tip of the plug p, the subscriber station and the choke coil d excites the end signal electromagnet S _n , so that it attracts its armature. As a result, in a manner known per se, a current of the battery B ₁ which excites the counter electromagnet ^ is closed, which via the electromagnet \, the spring / interrogation pawl m, the middle part of the plug o, the armature of a relay r and the armature of the end signal relay s ₂ runs.

As a result, the counter electromagnet attracts its armature, which causes the counter to be switched on. At the same time, a holding current of the counter electromagnet is closed by the armature of the counter in a manner known per se, which in this case flows from the battery B ₁ via the pawl springs /.

If, on the other hand , a connection is established by means of the plugs ο and ρ between the subscriber T ₁ and a service point D, which is switched as shown on the right in FIG

ι the following: When inserting the connecting plug ρ into the latch η of the service point D , a current of the battery B _{2 is} closed via the middle plug]] and the grounded special spring J ₁ , which energizes the relay r so that it attracts its armature and this opens the normally closed relay contact. If the reporting office then closes its supply current by picking up the receiver and the Schlußzeichcnrelais S _{2 is} excited, the counter cannot be switched on despite the closing of the contact on this relay, since the previously described path for the counter current through the armature of the relay r is open.

The mode of operation of the arrangement according to Fig..3 is briefly as follows: When the subscriber T _{1 is} connected to another ordinary subscriber, e.g. B. T ₂ , both the relay r and the closing signal electromagnet s _{2 is} energized by a current flowing through the subscriber station T ₂ when the telephone is picked up at the station called. As a result, both relays attract their armatures and thereby close the meter current as mentioned above. If, however, the plug ρ in the handle of the agency shown on the right as shown in FIG. 3 D η is inserted, the relay remains r According to the switched into the socket head of the department DC locking c-energized and the counter circuit is not closed. The supply and closing bell of the service stream D in this case runs from the battery B ₂ through the end character electromagnet s. _2, the plug tip ρ D of the service via the choke coil D and the earth. In this case, too, care must be taken to ensure the correct final signaling of the called office.

Of course, the device can also be made so that the counter electromagnet is short-circuited when connected to the aforementioned service lines.

Claims (4)

Patent Claims: i. Switching for call counters in telephone exchanges, in which the switching of the meter belonging to the calling subscriber is carried out by a current that is passed through one when picking up the call or attaching the handset to the called subscriber station closed contact, assigned to this point Electromagnet 'runs, which at the same time also gives the final signal can serve, characterized in that When the calling subscriber (e.g. T ₁ ) is connected to certain lines (service lines), the path of the current (B ₁ ,%, f, o, armature of around S ₂ , earth, B ₁ ) that excites the counter electromagnet (\ j) is kept open by the fact that the device (r) which closes the meter current in normal connections (with the desired subscriber) ίο cause, are rendered ineffective, without thereby affecting the final signaling or supply current supply of the called subscriber station (D) , for the purpose of avoiding counting with such connections, but reliably effecting the final signaling for all connections. 2. A circuit according to claim i, characterized in that in the way of the counter electromagnet (\) exciting current (B ₁ , \, f, o, armature of r and S ₂ , earth, B ₁ ) still a second contact (armature of r) is provided, which is kept open when the calling subscriber (T ₁ ) is connected to certain lines (service lines), but is closed for normal connections (with the desired subscriber) ... 3. A circuit according to claim 1 and 2, characterized in that by way of the counter current (B ₁ , \, f, o, armature of r and S ₂ , earth, B ₁ ) is the armature of a relay (r) , which at inserting the connecting plug (p) in a particular with a spring provided service line pawl (J ₁₎ (n) by a current flowing through this spring stream (B _2, r, p, J ₁₎ is energized and the normally closed state armature contact opens, on the other hand when inserting the plug into a common multiple pawl (Ic ₂ ) remains de-energized and keeps its armature contact closed. 4. A circuit according to claim 1 and 2, characterized in that the counter electromagnet (^) exciting current (B ₁ , \, f, o, armature of r and S ₂ , earth, B ₁ ) except through the electromagnet S ₂ the armature contact of an electromagnet (r) is closed, which is on the line of the plug cord opposite the end signal electromagnet (s ₂ ) , and when making normal connections (e.g. with T ₂ ) by a current flowing over the line of the called subscriber (B ₂ , r, p, T _% , p, S ₂ , B ₂ ) is excited, on the other hand, when the calling subscriber (T ₁ ) is connected to certain other lines (D), it remains unexcited by locking the current flowing through it (DC locking device c). 1 sheet of drawings.