DE158798C

DE158798C -

Info

Publication number: DE158798C
Application number: DENDAT158798D
Authority: DE

Description

PATENTAMT.PATENT OFFICE.

M 158798 KLASSE 21 a. M 158798 CLASS 21 a.

Bei der Speisung von Nebenstellen durch die Zentralbatterie des Fernsprechamtes ist der Anruf des Amtes nicht erforderlich in dem Falle, wo eine Nebenstelle mit ihrer Hauptstelle oder die Nebenstellen einer Hauptstelle miteinander in direkten Sprechverkehr treten, da das Amt dann keine Verbindung herzustellen, sondern lediglich den Speisestrom selbsttätig zu liefern hat. Für dieseWhen powering extensions from the central battery of the telephone exchange is the call to the office is not required in the case where an extension is with her Main unit or the branches of a main unit in direct speech communication with each other occur, since the office then does not establish a connection, but only the supply current has to deliver automatically. For this

ίο Stromlieferung stehen dieselben Leitungen zur Verfügung, über welche zu anderer Zeit der Strom für den Anruf des Amtes zu leiten ist. Während nun in letzterem Falle das Ansprechen des Rufzeichens im Amt gefordert wird, muß dasselbe im vorgenannten Fall der selbsttätigen Lieferung des Speisestromes vermieden werden. Gemäß vorliegender Erfindung wird der Anruf des Amtes dadurch erreicht, daß die beidenίο Power supply are the same lines available through which the electricity for the call to the office is to be conducted at other times. While now in the latter case the addressing of the call sign is required in the office, must be the same in the aforementioned The case of the automatic supply of the feed current can be avoided. According to the present Invention, the call of the office is achieved in that the two

ao Zweige der Teilnehmerleitung auf dem Amte über je eine Elektromagnetwicklung des Anruforganes mit einer geerdeten Batterie bezw. mit geerdeten Batterien derart verbunden sind, daß die Leitungszweige verschiedene Spannung gegen Erde besitzen und die Wicklungen des Anruforganes so angeordnet und bemessen sind, daß sie bei Hintereinanderschaltung der Leitungszweige auf der Haupt- oder Nebenstelle sich unter dem Einflüsse der zwischen den Zweigen herrschenden Spannungsdifferenz unterstützen und den Anruf des Amtes bewirken, sich dagegen in der Wirkung aufheben und den Anruf verhindern, wenn infolge Erdung beider Leitungszweige auf der Nebenstelle dieselben vom Speisestrom der Nebenstellen parallel durchflossen werden.ao branches of the subscriber line on the office via an electromagnetic winding of the call organ with a grounded battery respectively. are connected to grounded batteries in such a way that the branches of the line are different Have voltage to earth and the windings of the call organ are arranged and dimensioned so that they are connected in series the branches of the line on the main or branch are under the influence of those between the branches Support the voltage difference and cause the office to be called, but cancel each other out in the effect and make the call prevent if, as a result of earthing both branches on the extension, the same are flowed through in parallel by the feed current of the auxiliary units.

Eine Ausführungsform der Schaltung ist auf der beiliegenden Zeichnung veranschaulicht. Die Zeichnung stellt den Fall dar, daß zwei Nebenstellen JV₁, JV₂ der Hauptstelle H im Sprechverkehr miteinander sind und über die Doppelleitung 1, 2 und Erde den erforderlichen Mikrophonspeisestrom von der Zentralbatterie e des Amtes A erhalten, wobei durch Drosselspulen d der Verlauf der Sprechströme in der bekannten Weise auf die lokale Nebenstellenverbindung· b b beschränkt wird. — Die zur Herstellung der letztgenannten Verbindung erforderlichen Vorrichtungen sowie diejenigen, welche den Verkehr zwischen Haupt- und Nebenstellen einerseits und den Verkehr zwischen einer Nebenstelle und dem Amte andererseits vermitteln, sind als belanglos der Deutlichkeit halber in der Zeichnung fortgelassen und in der üblichen Weise ausgeführt zu denken. Aus dem gleichen Grunde ist die innere Einrichtung der Stationen, welche sich vom Hergebrachten nicht unterscheidet, nur bei der Hauptstelle H in einer einfachen Ausführung veranschaulicht. Da ferner die bekannten Amtseinrichtungen zur Gesprächsvermittlung zwischen zwei Teilnehmeranschlüssen (mit und ohne Nebenstellen) und zum Anruf der Teilnehmer (mittels Wechsel-An embodiment of the circuit is illustrated on the accompanying drawing. The drawing illustrates the case that two extensions JV _1, JV ₂ of the main body H are together in the voice traffic and received on the twin conductor 1, 2 and ground the required microphone supply current from said central battery E of the office A, wherein d by inductors, the course of Speech streams are limited in the known manner to the local branch exchange connection · bb. - The devices required to establish the last-mentioned connection as well as those which mediate the traffic between main and branch offices on the one hand and the traffic between a branch and the office on the other hand have been omitted from the drawing for the sake of clarity and are carried out in the usual way think. For the same reason, the internal equipment of the stations, which does not differ from the traditional, is only illustrated in a simple design for the main station H. Since the well-known exchange facilities for call switching between two subscriber lines (with and without extensions) and for calling the subscribers (by means of alternating

Claims

Strom) do not experience any change, the establishment of the office is also simplified Way shown, so that the circuit according to the invention emerges clearly from the same.

This circuit consists in that the branch ι of the subscriber line has a j winding Wi _{1 of} the calling electromagnet and a small battery C ₁ with one pole

is connected ίο the grounded at the other pole microphone battery e while branch 2 m above a second winding. ₂ of the call electromagnet also communicates with the first pole of the battery in connection e. The windings Wi ₁ and m ₂ are arranged on their common iron core so that they counteract each other when, as shown, both branches of the line in parallel circuit are flowed through by the microphone stream of the extensions. As a result, the anchor α remains at rest and the local circuit of the callsign 5 is open, so that a call from the office does not occur.

The second circuit characteristic of the invention comes about when the main station switches itself or an extension for a call to the office in a bridge to the subscriber line by flipping the switch u of the main station - which schematically represents any such switching or connecting element. When the handset of the call station is removed, a current flows from the battery C ₁ via the loop line 1, 2, the call station and both windings of the calling electromagnet, through which current flow the windings are now excited in the same sense, so that the armature a is attracted and the call lamp 5 lights up.

In order to ensure the described mode of operation of the windings! 7Z ₁ and m. ₂ , an appropriate dimensioning of the resistance and the number of turns is necessary. In the diagram, this is indicated for the same number of turns by the resistor ip inserted in front of the battery C ₁ , by means of which the excess voltage of the branch 1 for the supply circuit is compensated for in the required manner.

The size of the battery e _{ is to be selected according to the line resistances and the required call current. The same can also be arranged with reversed poles in opposition to the battery e , whereby the measures mentioned to compensate for the excess voltage have to be changed accordingly. are to be attached to the other line branch ".

Batteries e and e _: can be replaced by other equivalent arrangements. For example, each branch of the line can be connected to earth via its own battery, the two batteries being of unequal size to be chosen so that the voltage between earth and one branch (1) of the voltage between earth and the other branch (2) exceeds a certain amount (e _t ). This amount is only effective in the described call circuit of the branches as a result of the batteries interacting with one another, while in the case of the supply circuit, both batteries produce electricity in parallel with one another.

Further embodiments result when the interaction of the windings Wz ₁ and m ₂ according to the invention is achieved in a structurally different, equivalent manner instead of by means of a common iron core and common armature.

Ρλτεντ claims:

Telephone circuit with central battery for calling the office and supplying power of extensions in which the branches of the subscriber line on the exchange with each one electromagnet winding of the call organ are connected, characterized in that, that the windings of the call organ BEZW with different strong grounded batteries. different Parts of the grounded office battery are connected in such a way that the branches have different voltage to earth and the windings of the call organ are arranged and dimensioned in such a way that that when the branches are connected in series on the main body, they are subject to the influences of the Branches of the prevailing voltage difference support and the call of the office cause, however, in the effect cancel and prevent the call if • as a result of earthing both branches on the extension the same flowed through by the feed current of the extension in parallel will. "

1 sheet of drawings.