DE521524C - Circuit arrangement for telephone systems, in which female officers are given optical and acoustic signals at the same time - Google Patents

Description

GERMAN EMPIRE

ISSUED ON MARCH 25, 1931

REICH PATENT OFFICE

PATENT LETTERING

CLASS 21a ³ GROUP

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

Patented in the German Empire on June 26, 1926

For telephone systems in which connections are established by officers, It has been suggested that the officers transmit acoustic signals as well as optical signals allow. Here are special facilities that affect the officer's listener provided in sound generation, which under the influence of the microphone units by control devices at the same time with the optisehen. Characters are turned on.

The invention now aims at a civil servant only to special, from the intercoms giving characters without the use of special devices for sound generation to draw attention and achieves this by the fact that when emitting flicker signals the officer is given an acoustic signal by the fact that those in the circuit of the optical character inductive current changes occurring during the flak act on the officer's earpiece.

The arrangement according to the invention can, for example, be particularly advantageous Use private branch exchanges in which the supervising officer should establish an inquiry connection and the request this is indicated by a flicker sign. However, the invention is not restricted to this. It can of course also be used for other systems and other purposes.

An exemplary embodiment of the invention is shown in the drawing. If z. B. an existing trunk connection can be transferred from one extension to another If you have to, the first extension usually calls the exchange using the house telephone to give the instruction to trigger. If, however, the participant wants communicate in a simpler way with the officer concerned, then it generates by repeated short depressions his hook switch flickering at the tail lamp of the workplace, which, like already stated, can easily be overlooked by the officer.

In the drawing, the parts required for the operation of the arrangement are shown schematically, for example following a Z2? -NebensteUenvermittlung. In addition to the other circuit devices at an officer seat, an induction coil I O _{1 is} switched on in the circuit of a tail lamp SL ₁ , the secondary winding II U _{1 of which is} connected to the receiver. II (Z ₂ and II (7 ₃ denote the secondary windings of two other

The inventor has been given by the palm seeker:

Anton Bock in Berlin-Siemensstadt.

Claims (1)

reu induction coils, their primary windings with the tail lamps of other cord circuits lie in series. So all of the secondary windings of these induction coils are connected in series in a special transmission circuit. The mode of action is as follows:
Assume that the officer of an exchange has extension A with ίο connected to an office accessible via the connection plug VSt and the connection link Kl ₂ , and the existing connection should be transferred to another extension for whatever reason. In order to communicate with the officer of the private branch exchange, the subscriber .4 moves his hook switch, whereby the call relay NAR, which is energized via its contact Ii ₁ while the connection is established, drops as a result of the power interruption at the head contact and again when the hook switch goes up appeals to. This alternating dropping and re- energizing of the relay NAR generates flickering signals at the tail lamp SE _{1 of} the workplace in a known manner, in that when the hook is pressed down. Changeover switch, the following circuit is formed: earth, contact k ₂ , resistance W ₁ , jack / C ^ i, c-wire of the interrogation plug ASt, tail lamp Su ₁ , primary winding of the induction coil IU ₁ , battery, earth. When the call relay AM /? the circuit is interrupted and closed again when the relay drops out. The final lamp SL ₁ flickers, and simultaneously, the official of the induction coil is replaced by transmission "of the connected to the receiver secondary winding II U ₁ by means of the transformer U ₁ clicking noises in its receiver, which makes them ready to run acoustically 4" kerzeichen to the flak au ^c me: ksam is made. . Text claim: Circuit arrangement for telephone systems, in which officers at the same time optical and acoustic signals are given, characterized in that that when issuing flickering signals (e.g. for the purpose of making inquiries) the officer is given an acoustic signal by the fact that the in The current changes occurring in the circuit of the optical sign during the flickering are inductive to the listener the civil servant act. 1 sheet of drawings