DE218615C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

- JVe218615 - '■ CLASS 21 a. GROUP

• SIEMENS & HALSKE AKT-GES. in Berlin.

Illumination of a lamp at the officer's place is indicated.

Patented in the German Empire on April 19, 1908.

In the case of call counter circuits in which the count is carried out by those arranged in the office Call counter via the interrogation latch and a wire of the plug cord by pressing a button arranged in this is made, it is expedient in place . to order the officer a control lamp, which only lights up when the meter is electromagnet after switching

has turned on ίο of the counter in a holding circuit so that the lighting of the lamp indicates that the count is properly • come into being moderately.

The invention relates to a call counter circuit of the type mentioned, in which the switching on of the control lamp takes place in such a way that the counter circuit via the winding of a. Relay is closed, which creates a branch to the counter circuit through its armature. This branch is led via a relay, which switches on the control lamp. According to the present invention, the proportions of the branch are dimensioned so that the voltage prevailing therein is equal to that at the branch point of the counter circuit, so that a current flow through the branch does not initially come about. If, however, the counter responds, after the count has been completed, it causes a change in the current flowing through the plug cord and thus also a current flow over 35

the junction, which activates the relay influencing the control lamp will.

The drawing shows in FIG. 1 an embodiment of the subject matter of the invention in Application to a counter circuit whose counter electromagnet with differential winding is provided. Fig. 2 shows a modified circuit of the switch-on relay for Control lamp.

In the circuit shown, when the interrogation plug iSin is plugged in, the pawl of the subscriber requesting a call connection flows through the windings W ₁ and W _{2 of} the counter electromagnet Z in such a way that an effect on the counter armature ζ is initially not exerted. The office is called in the known manner in that when the receiver is removed from the subscriber station, the call relay attracts its armature and an auxiliary relay is thereby energized, which actually switches on the call lamp. The counting is only effected by pressing a counting key T , which is arranged in the third plug cord, in the case shown in the circuit of the tail lamp Si. It may be assumed that the counting is only effected when, after the end of the conversation, the two subscribers hang up their earphones to switch off the tail lamp SL or the monitoring

Claims (3)

made lamp UL appear; however, a count at this very moment is not essential to the subject matter of the invention. If the counting button T is pressed, the current of the tail lamp SL, which together with that of the winding W _{1 of} the counter Z, after the interrogation plug has been inserted, the supply of the second counter winding w., to caused, switched off by opening the contact f of the button T , and a relay winding η of relatively low resistance is shunted to the winding W ₂ through the contact g ; the current flowing in this winding is consequently considerably weakened, while that through the counter winding W ₁ is strengthened, so that an action is now exerted on the counter armature .z. The current flow through the relay winding η causes the closure of a contact c, where. by branching off to the circuit: battery B, counter winding W ₁ , contact g of button T, relay winding n, earth. This branch leads via a relay ER, which is connected to point d of a circuit on the other side: battery B, contact h of button T, resistors J ₁ , .J ₂ , earth. By suitably dimensioning the resistors J ₁ , J ₂ it is achieved that, as long as the counting is not yet completed, the same voltage prevails in points d and c, so that no current flows through relay ER . On the other hand, as soon as the counter armature is fully tightened and has thereby caused the counter to advance, it brings, in the case shown, for. B. by opening a contact q and switching on a resistor p, a change in current in the counting circuits passed through contact g; in the example the voltage at contact c is reduced so that a current flows from point d to c. The flow of current excites the relay ER, which now turns on the control lamp CL by tightening its armature, the lighting of which the officer recognizes that the count has been carried out properly. In addition, the resistor j> has the effect that after releasing the counting key T, despite the short-circuiting of the counter winding W ₂ by the attracted armature ζ, the tail lamp LS receives the same current as before the counter Z responded. The monitoring lamp UL has a resistor in parallel and with a second resistor, which may also be located in the socket line, as indicated by dotted lines, connected in series, so that firstly the tail and monitoring lamps SL and UL receive the same current, and secondly the second (right-hand side ) The winding of the auxiliary relay receives the same amount of current flow when the interrogation or a multiple latch is plugged. In the embodiment of the circuit shown in FIG. 2, the _{resistors J 1} , J ₂ placed in a local circuit when the contact h of the counting key is closed are designed as windings for the relay ER which causes the control lamp CL to be switched on. As long as the counting armature has not yet completed the counting movement after pressing the T key, the same voltage prevails again at points c and d. The ratios are then dimensioned such that the effects of the coils B ₁ and J ₂ on the switch-on relay ER cancel each other out. If, however, in the above-mentioned manner, after the count has been carried out, the voltage in the counter circuits changes, the relay responds. If the voltage in the circuit is lower (as was assumed with respect to FIG. 1), the relay winding η forms a shunt with the winding J ₂ ; the current in J ₂ is thereby weakened, and that in coil J _{1 is} increased, so that the effect of the latter predominates. Conversely, if the response of the counter armature caused a voltage increase in the line branches, current would be supplied from point c to d and the effect of coil J _{2 would be} increased. Patent-A ν Proverbs: χ. Conversation counter circuit, in which the counting is effected via the interrogation latch and a wire of the plug cord by closing a local counter circuit by means of a button in the plug charger and the completion of the count is indicated by lighting up a lamp at the officer's place, characterized in that the counter circuit (B. , W ₁ , p, T, g, n, earth, B) is closed via a relay (n) , which by tightening its armature (c) creates a branch (c, ER, d) on the counter circuit, which leads to a the switching on of the control lamp (CL) relaying relay (ER) is carried out, and in which the voltage is initially the same as at the junction point (c) of the meter circuit, via which, however, the activation of the switch-on relay (ER) only comes about, 'as soon as the armature (z) of the counter electromagnet (Z) has caused a current change in the counter circuits after the count has been completed. 2. call counter circuit according to claim i, characterized in that when Pressing the count button (T) a local circuit (B, h, b ₁ , b. ₂ , earth, B) is formed, and that this is on the one hand at a junction point (d) of this circuit and on the other hand via the armature (c) of the relay ( n) in the meter circuit connected to this switch-on relay (ER) for the control lamp (CL) as a result of the current draw in the plug loader caused by the attracted meter armature (z) from the local circuit receives current through which it is kept energized until the button is released . 3. call counter circuit according to claim i, characterized in that the I resistors (b _x , b ₂ ) of a local circuit (B, h, I ₁ , b. ₂ , earth) switched on when the button (T) is pressed, as differential windings are designed for the switch-on relay (ER) , at the connection point (d) of which a junction is routed to the contact points (c) of the counter circuit, which are also closed when the button is pressed, via which a current that makes the relay (ER) respond comes about after the counter armature a change in current after counting is completed has brought about in the meter circuits. 1 sheet of drawings.