DE587957C - Circuit arrangement for telephone systems with dialer operation to produce favorable working conditions for surge receiving relays during the surge - Google Patents

Description

GERMAN EMPIRE

ISSUED ON
NOVEMBER 10, 1933

REICH PATENT OFFICE

PATENT LETTERING

JVl 587957 CLASS 21 a 3 GROUP 67 ίο

Siemens & Halske Akt.-Ges. in Berlin-Siemensstadt *)

Patented in the German Empire on February 1, 1927

. The present invention relates to an arrangement for telephone systems with dialer operation to create favorable working conditions for surge receiving relays during the current surge.

Arrangements are already known in which the surge receiving relay during the current impulse is switched into a more sensitive current circuit. With these Arrangements, however, one of the switching times of the relay is adversely affected.

Furthermore, arrangements are known in which the operation of the surge receiving relay by pre-excitation and counter-excitation of the magnetic fields with the aid of a 'secondary auxiliary circuit he follows.

The present invention now aims at each energization state of the relay to shorten the switching time required to achieve the other state of excitation. the The safety of the working method is to be increased, but without secondary auxiliary circuits to have to help. This is achieved by the fact that the surge receiving relay so does the rush current ratios in its own rush receiving circuit itself controls that in this circuit with each of the excitation states the relay on current ratio suitable for quickly reaching the other state of excitation is available.

In the figure, the circuit of a group selector is shown as an embodiment of the invention. Assuming that the group selector shown in the drawing has been occupied by some upstream switching device, the relay C is energized. As a result, the contacts c ¹ to c ^{4 are} actuated. The winding II of the relay C is connected to the c wire by contact c ^1. Contact c ² applies earth to the circuit for lifting magnet H. However, this is not energized, because when the group selector is occupied, relay A and relay B on lines α and b are energized. The excitation circuit for relays A and B runs from the battery, winding of relay A, α-wire via the preselector, not shown, subscriber loop to the fr-wire, winding II of relay B, contact ar of relay A, earth. The relay B opens the short circuit of the winding II of the relay C through its contact b ^1. The relay A opens the circuit for the solenoid H through its contact a ¹

*) The patent seeker stated as the inventor:

Max Langer in Berlin-Hermsdorf.

If the participant sends out current surges by means of his dial, the relay A is made to drop out at the first interruption of the loop. Since the contact A of the relay ² at Erregtsein A is open, the relay A falls as a result of the switched on in the Er'regerstromkreis the relays A and B resistance of the winding of the relay I B rapidly. The solenoid receives a current impulse via contact a ^1. If the loop over the lines a, b is now closed again, the current conditions in the circuit of the relays A, B by short-circuiting the winding I of the relay B through the contact a ^{2 are} such that the relay A responds significantly faster than when winding I of relay B would not be short-circuited. When the solenoid // was excited, the relay V was excited via its windings I and II, whereby the circuit of the rotary magnet D is interrupted by the contact v ¹ . If the switching arms of the group selector are set to the desired decade, relays A and B are energized after the end of the current impulse, so that relay V is made to drop out. With the first lifting step of the selector, the head contact k ^{1 was closed} , so that the following circuit is established when the relay V drops after the participant sends out the series of impulses for the rotary magnet D : Earth, contact k ¹ , contact p ¹ , left contact on the double work contact V ¹ , winding of the rotary magnet D ₁ battery. The rotary magnet D is energized and actuates its contact d, whereby an excitation circuit for the relay V is produced, which runs from the battery via the winding of the solenoid H, winding of the relay V, closed cü contact, head contact k ¹ , earth. Since the contact w was opened when the selector was first turned, the resistance of the relay V in relation to the resistance of the winding of the lifting magnet // is such that the lifting magnet H is not excited in this circuit. When the relay V is excited, the double normally open contact v ^{1 is} opened and the circuit for the rotary magnet D is interrupted. The rotary magnet D is de-excited and opens the circuit for the relay V through contact d . The relay V closes the contact v ¹ when it drops, which in turn closes the circuit for the magnet H. This mutual play between the relay V and the magnet D is continued until the selector's test arm has found a free line. If the test arm finds the battery via the outgoing line c , the relay P is energized and, through its contact p ^1, opens the circuit for the rotary magnet D. The contact p- puts earth on winding I of the relay P. The contacts ρ ^Ά -and p ⁱ switch the connection through. If the connection is to be released, the calling subscriber hangs up his receiver, causing relays A and B to drop out. The relay A closes the contact ar and thereby again provides the appropriate current to respond to the relay A. relationship here. The relay B short-circuits the winding II of the relay C through its contact b ¹ , so that the relay C is caused to drop out, since the head contact k ^{2 has} already switched off the winding I of the relay C from earth during the first stroke of the selector. The winding I of the relay P is short-circuited by contact c ⁴ , so that it is de-excited. This closes the contact p ¹ and energizes the rotary magnet via earth, contact k ¹ , contact p ¹ , left contact on the double work contact v ¹ , ' winding D of the rotary magnet, battery. The rotary magnet now takes a step and actuates its contact d, creating a circuit for the relay V via earth on the head contact k ¹ , double working contact d, windings I and II of relay V ¹ , winding H of the lifting magnet //, battery, earth comes. The lifting magnet if does not respond in this circuit. However, the relay V is energized and actuates its contact v ¹ , whereby the double ^{normally open contact v 1 is} opened and the rotary magnet D is de-energized. In this way, the switching arms of the group selector are rotated until they have reached their rest position and the head contact k ^{1 is} opened. When the relay P drops out, the downstream switching devices are triggered by any switching measures.

Claims (3)

Patent claims: ι. Circuit arrangement for telephone. systems with voter operation for production favorable working conditions for surge receiving relays during the current surge, characterized in that, that the surge receiving relay controls the current ratios in its own Current surge reception circuit itself controls in such a way that in this circuit one of the energized states of the relay (energized or de-energized) to quickly reach the other energized state suitable current ratio is available. 2. Scarf processing arrangement according to claim 1, characterized in that the surge receiving relay in an excited state switches on a resistance in its circuit and in de-excited state turns off this resistance. 3. Circuit arrangement according to Claim 2 for systems with consisting of two relays Feed bridges, characterized in that the surge receiving relay in the deenergized state has a winding of the second relay of the feed bridge short-circuits. 1 sheet of drawings