DE174079C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

- Ju 174079 CLASS 21 a. GROUP

GEBR. HAVE A LOT in HAMBURG.

Telephone system with line selector. Patented in the German Empire from 19. ApHI 1905.

The present invention relates to a telephone system with line dialer and relates to the arrangement of a special switching device at or on each intercom. This facility is intended to enable a call station despite Non-deactivation of the own line selector still called from other intercoms can be, and furthermore that they are not

ίο Intercom stations in communication with one another switched off, d. H. prevented from eavesdropping.

The intended purpose is achieved by listening to the telephones or individually Call stations of the system or at other suitable places attach a reversible, resilient contact lever, which usually the line leading to the telephone set of the intercom or Line dialer line with the wake-up circuit of this telephone set holds in conductive connection, so that when you call this Intercom station, even though its line selector has not been switched off, current pulses from the line line can get into the wake-up line of this called station. For the purpose communication with another intercom becomes the contact lever of your own intercom changed after setting your own line selector, whereby the previously Secure connection between line and wake-up line on your own telephone interrupted and the latter respectively. its battery to the previously set, after the line line leading to the call station to be called is switched; so that thereby Connection between your own telephone set and the wake-up line of the called telephone set created is. By the interruption respectively. Switching off the according to the own telephone set leading line line are also all others connected to this line line Call stations switched off during traffic of the two connected call stations so that they cannot overhear can.

In the accompanying drawing, the device and circuit is one of the invention corresponding telephone system with line selector for three call stations in schematic Representation brought for illustration.

The equipment ■ of the three call stations I, II, III is identical, the same parts are therefore designated with the same letters but different ratios. In appropriate places, e.g. B. in the telephones i ¹ , t ² , t ³ is a resilient contact lever a ^l , d ² respectively. a ³ arranged, which respectively with the wake-up line W ¹ , W ^2. W ^{3 of} the associated apparatus is conductively connected. Usually the levers a ¹ , a ² , a ^{3 are in} contact with contacts b ^l , b ² , b ³ , which respectively by means of lines L ¹ , L ^2. L ^{3 are connected} to the line lines k ³ , k ² , k ^l . The after the line selectors n> ¹ , w ¹ respectively. w ³ leading lines S ¹ , S ² respectively. S ³ are with similar contacts c \ c ² respectively. c ³ provided. The levers

a ¹ , a ² , a ^a can be or by suitable push buttons d ^l , d ' ^2. d ³ or the like on the contacts c ¹ , c ' ² respectively. c ³ to be converted.

Will z. B. Talking station I with station III, then station I only needs to put the plug or lever s ^l on contact 3 of its line selector and by pressing button d ^{l put} the lever a ^{l of} its switching device on contact c ¹ , Then a circuit is established between the battery of station I and the bell of station III, which is closed as soon as the alarm button e ¹ of station I is pressed. ^ As soon as you press this button, a current goes from the battery / ¹ through the line g ¹ , the lever h ^l , the line i ¹ , the lever α ¹ , the contact ¹ , the line S ¹ , the contact 3 of the line selector »' ¹ , the line k ^l to station III, there through the line L ³ , the contact b ³ , the lever a ^a , the line i ³ , the lever h ³ , the line ^ ³ , the wake-up line W ³ and the The bell is switched on, the lever I ^s , the line m ³ , the line u ³ , to the common line R, which leads back to the battery f ^{x of} the station I. This causes the bell of station III to sound. As soon as the remote receiver t ^{3 is} removed from the hook lever / ³ at this station, the connection between the wake-up line W ³ and the lever Z ^{3 is} interrupted; the bell on station III is then switched off. By ticking off the receiver, everyone is on both wards I and III

.. Microphone M ¹ respectively. M ³ with its battery f ^l respectively. f ^{3 connected} in a known manner and at the same time the listener i ¹ respectively. i ³ connected to each other. From the battery f ¹ the current now goes through the line v ¹ , the primary coil r ¹ , the microphone M ¹ , the line x ¹ , the lever Z ¹ and the line u ¹ back to the battery f ¹ . At the same time, the induced currents go from the secondary coil y ^{1 through ^ 1} , / ¹ , h ¹ , i ¹ , a ¹ , c \ S ¹ , s ¹ into line k ^l to station III and there through L ³ , b ³ , α ³ , ζ ' ³ , h ^s , j ³ ,% ³ , y ³ , n ³ , via o ³ through the line p ^{3 of} the listener t ³ via ^ ³ to the lever / ³ , through m ³ , u ³ , R back to station I, here through u ^l , I ¹ , over q ¹ through j? ¹ , via o ¹ through η ^{Λ back} to the secondary ^ ¹ .

After the conversation has ended, the released push button d ^l resp. Lever a ¹ automatically in the rest position respectively. back to contact b ^l . If you forget to turn off the lever s ^{l of} the line selector on intercom station I, this has nothing to do with it, as the automatic reset of lever a ^{1 means} that apparatus I is switched back on to line line k ³ and is therefore called from every other intercom station can be. Assuming that the lever s ¹ has stopped on contact 3 of the line selector w ^x and speech station II wants to communicate with speech station I, the plug s ^{1 is} inserted into the hole ι of the line selector w ^l and the lever a ² on the contact c ² placed, then the connection between II and I is established, despite the fact that the lever s ^{1 is} on contact 3 of the line selector η> ^λ . When the alarm button e ² is pressed, a current goes from the battery f ' ² through g ² , /? ² , i ² , a ² , c ² , S ' ² , s ² , k ³ to station I, there through L \ b \ a \ i \ h \ j \ w \ I ¹ , m ¹ , u \ R, r back to battery f ² -

For the sake of completeness, it should also be mentioned that the connection of the contact 2 of the line selector η> ^λ with the apparatus II by lines k ² . takes place, that of the contact 3 of the line selector w ¹ with the apparatus III through lines k ¹ , while the connection of the line selector w ^z with the apparatus I through lines k ³ and with the apparatus II through lines k ² . ,

Claims (1)

Patent Claim:. Telephone system with line selector, characterized in that each. Intercom is provided with a switching device, the resilient contact lever usually that of the telephone set the line leading the call station with the wake-up circuit of this telephone set in a conductive connection keeps to when calling this intercom, even in spite of non-division your line selector current impulses from the line line in the wake-up circuit to get this called intercom before calling BEZW. Awakening another call station but BEZW from the participant. The speaking person is switched to the connection between the two Line line and wake-up circuit to interrupt your own telephone and the latter respectively. his To connect the battery to the previously set line line and thereby to the To connect the wake-up circuit of the called station. 1 sheet of drawings.