DE619336C - Circuit arrangement for dialers which can be reversed to several traffic directions, especially for telephone systems - Google Patents

Description

GERMAN EMPIRE

ISSUED ON SEPTEMBER 27, 1935

REICH PATENT OFFICE

PATENT LETTERING

JVi 619336 CLASS 21a ³ GROUP 37

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

Addendum to patent 604

Patented in the German Empire on April 26, 1931 The main patent started on March 15, 1931.

The present invention represents an expedient development of the main patent 604407 protected idea and consists in the fact that an activated when the changeover criterion takes effect Differential relay interrupts the test circuit and this only when a detent position is reached, before another Leadership group brought to waste through differential action, restored. On the Drawing is shown an embodiment of the invention, but on which this is not restricted.

Assuming the subscriber at the subscriber station Tn lifts his receiver, the following circuit is established: earth, contact 2 *, line Lb, loop at the subscriber station, line La, contact i ^f , winding of relay R, battery, earth. The Re-

ao lais R is excited and operates its contacts y and 8 ^r . The following switching circuit of the selector UW is established through contact J ^r : Earth, contact ? ^r , position 0 of the switching arm ve, contact 6 ', rotary magnet Duw, interrupter device Un, battery, earth. The rotary magnet is operated in a pulsed manner and switches the arms step by step. The test circuit was prepared by contact 8 ^r. If the switching arms of the selector UW get on a free line, for example on the line La ¹ , Lb ¹ , Lc ¹ , Lu ¹ , the following circuit is established via the line Lc ¹ : Battery, switching devices (not shown) on the line Lc ¹ , line Lc ¹ , switching arm ve, line Lc, contacts 8 ^r , ii «, windings I and II of the relay T, earth. Relay T responds in this circuit. The switching circuit is interrupted by contact 6 ^t. The test circuit is maintained via contact 3 *. The winding II of the relay is short-circuited by contact 4, so that the line appears blocked. Contact 5 * prepares the reversing circuit. The contacts x * and 2 * switch the subscriber line through and the relay R from it. The relay R drops out and opens its contacts.

If the subscriber wants a connection in a different traffic direction, for example in traffic direction V ² , he can change the traffic in any known way.

*) The patent seeker stated as the inventor:

Walter Pinell in Falkensee.

Switch on the control criterion which causes the contact I2 ^{X to be} closed. This creates the following circuit: Battery, resistor Wi, line Lu ¹ , contact -5 contact 12 *, switching arm vd of the selector XJW, contacts 5 ', 9 ¹¹ , winding II of the differential relay XJ, earth. The differential relay responds and operates its contacts 9 "to n ^a . Contact 11" causes relay T to drop. The 10 ^s contact maintains the reversing circuit. Contact 9 "is thrown over and causes the relay U to be kept energized via winding II. When relay T drops out, contact & ■ is closed so that the selector is switched on. If contacts i * and 2 'drop, relay R applied to the subscriber line and, since the subscriber has not yet hung up, made to respond again. This ^{closes the contact 8 r} , so that the test circuit of the selector running over the Lc wire is prepared again Sa, Sb, Sc, Sd, so is made to the following circuit through the locking points contact Sd: earth, battery, winding I of the relay U, catch locations contact Sd, switching arm vd, contact io ^B, earth In this circuit the winding I is the differential relay XJ. switched on, causing the relay U to drop out. The contacts of the relay 17 are in the rest position. The test relay T was switched on ^{again via contact ii B} , so that the selector be i its further search process within the management group V ^{s is} ready for testing. If the voter gets on a free line within group V ² , for example on the line La ² , Lb ² , Lc ² , the relay T speaks via earth, battery, line Lc ² , switching arm ve, line Lc, contacts 8 ^r , n ^B , windings I and II of relay T, earth on. The relay T switches its contacts, the rotary magnet is stopped and the relay R switched off. The subscriber can now establish his desired connection in any known way.

If the subscriber hangs up his receiver at the end of his conversation, the test wire Lc ^{2 is opened} in any known manner. This de-energizes the relay T. The contacts of the relay T return to their rest position. The switching circuit is restored by contact 6 ^f. The selector is switched on via the segment on the switching arm ve until it has reached position 0. In this is. the. Switching circuit interrupted, the selector is ready for further use.

Claims (1)

Claim: Circuit arrangement for voters that can be reversed for several traffic directions, especially for telephone systems, according to patent 604407, characterized in, that a differential relay actuated when the reversing criterion becomes effective interrupts the test circuit and this only when a detent position is reached, in front of another group of leaders through differential effect brought to waste, restores. 1 sheet of drawings