DE282918C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

- Λ! 282918- CLASS 21 a. GROUP

JOSEF PINTER in UJPEST β. BUDAPEST.

of the meter is displayed to the office.

Patented in the German Empire on August 10, 1913.

So far, with telephone systems, with automatic operations, circuits known in which the automatic dialer device with the line of the calling party Participant is only connected if appropriate by an inserted coin Contacts are closed; this connection is made at the subscriber station itself. On the other hand, devices were known for telephone systems with manual operation, in which the officer only establishes the desired connection if the participant has one at his / her intercom beforehand arranged. Secondary device (cashier, counting or recording device, etc.) operated, with appropriate control devices (recording or signaling devices) in the office speak to; only after observing the same does the officer establish the connection if the findings are correct here.

The present invention now aims to make the arrangement in manual operation, that the establishment of the connection is not made by registration or display devices provided by the office made dependent, but exclusively while maintaining the usual measures to be taken by the civil servant completed automatically as a result of the activation of the auxiliary machine of the subscriber station will. As a result, the aforementioned apparatus in the office become superfluous and the civil servant is relieved.

This is achieved by the fact that in the office of the plug cord circuit itself at one Position is interrupted and switching elements are assigned to these interruption parts, which are controlled by the circuit of the calling station, so that the plug cord circuit also interrupted by the officer after inserting the two plugs stays until the. Subsidiary set at the calling station is operated, the aforementioned interruption closed and thereby the connection is completed automatically.

In the circuit according to the present invention, therefore, in terms of manufacture distinguish two phases of a connection. The officer is in the first phase Central, which the subscriber calls in a known way by lighting up a lamp, the interrogation plug of a pair of plugs into the interrogation latch of the calling party, the Connection plug, however, in order to establish the desired connection in the connection pawl the desired participant; between the two plugs, however, there is currently no transmission of the Conversations suitable context, so that the calling party with the called can't speak yet. Only if, according to the Office's call, the participant Actuation of the auxiliary apparatus actually causes, e.g. B. the corresponding coin in throws in the self-cashier or that possibly

already thrown in before calling the control center Coin transported by pressing a button in the cash box or a counting device advances, etc. - with which he simultaneously with the line of the telephone station related circuits are influenced accordingly - ·, ■ the second phase comes about, in which the two plugs used to make the connection into such Connection come so that the conversation can now begin via the same.

As can be seen, the officer has only the usual measures for manual operation without To make a delay and to pay attention to nothing further, especially since the control without special registration or display devices in the office automatically in the corresponding phase is accomplished. For the sake of complete security, however, in the mentioned In the second phase, signal circuits can also be influenced at the same time in such a way that that they indicate to the officer whether the participant is doing the desired activity took place, but according to the invention this signal expediently not an instantaneous, but is a permanent one, so that the officer does not after the completion of the connection must wait until the participant accomplishes the aforementioned operation, but they can establish further connections for other participants after inserting the plug and can also determine at any later point in time whether the actuation was made or not.

The switching element assigned to the interruption point of the plug cord circuit in the office can be designed in a variety of ways, such. B. in the form of a differential relay, whose two coils excite the core of the relay in the first phase in opposite directions, so that the armature of the relay is not attracted.

But as soon as the subscriber sets the secondary phone to work, influence it Contacts the circuits in such a way that one coil of the relay is de-energized, the armature of the relay is picked up and the circuit goes into that of the second phase Condition over.

Instead of a differential relay, i. H. instead of a purely electrical device can also a two-stage mechanical switching device triggered by means of an electromagnet is used which when the participant calls from their rest position to that of the first Phase corresponding position reaches while it is under the influence of the auxiliary apparatus comes into the second position, in which it corresponds to that of the second phase Establishes circuit condition.

To achieve this purpose, of course, from construction or other Several switching elements can also be used in combination with one another, without reasons that this would change the essence of the invention.

Since the participant only influences the circuit for a short time, must appropriate means are used to ensure that, as mentioned, the circuit also continues to remain in the second phase when the subscriber is actuating the auxiliary telephone has already ended.

If the switching element is designed as an electrical relay, this can be done easily a winding attached to the relay can be achieved, through which after tightening the Relay armature as long as current flows, and the relay is thereby effective for so long The position remains until this circuit is interrupted when the connection is loosened.

This holding the moving part of the switching element in the operative position can but also in other ways, e.g. B. be carried out mechanically by means of retaining elements, which are brought under the influence of an electromagnet that when Loosen the connection the locking elements under the action of this electromagnet get in such a position that the movable part of the switching element in can return to its position of rest.

For the aforementioned signaling to indicate that the auxiliary device has been actuated the call station can use any existing switchgear lamp of the office, advantageously the call lamp itself can be used. · In this case the cut-off relay, which switches off the call relay that controls the call lamp, is below put the influence of the switching elements, so that when they respond, the isolating relay current gets and the call relay switches off, whereupon the latter releases its anchor and the previously lit call lamp goes out.

The drawing shows an exemplary embodiment of the circuit according to the present invention.
! ι denotes the subscriber station, 2 the j call device of the office belonging to this station, 3 a plug line of the office.

The subscriber station 1 shown consists of the microphone 4, the handset 5 and the hook switch 6. (The remaining parts not affecting the essence of the invention of the intercom are not shown.) The secondary set arranged at the subscriber station consists according to the example shown of a call counter, which on

the drawing is shown schematically by a ratchet wheel 7 and by a pawl 8 moving the same. The counting device is related to the contact device consisting of springs g, io and ii in such a way that in the event that the key spring g is depressed, it comes into contact with the springs io and ii on the one hand, but on the other hand by means of

ίο the pawl 8 the ratchet wheel to a corresponding one Twisted the angle and thereby the counting device advances by one number.

The remaining parts of the device are described in connection with their operation, which is the following:

If the subscriber lifts his handset to make a call, the hook switch 6 the following circuit is closed:

Hook switch 6, receiver 5, microphone 4, branch 12, contact 15 of the isolating relay 14, winding 17 of the call relay 16, shared battery 18, winding ig of the call relay 16, contact 20 of the isolating relay 14, branch 13, hook switch 6. This pulls the call relay 16 to its anchor, closes the contact 21, and the call lamp 22 lights up.

The officer puts the interrogation plug 23 into the interrogation latch 24 and brings her own Speaking device 26 by putting the query key 25 in the right-hand question provides, in a known manner with the subscriber station ι in connection. After you has found out the number of the desired subscriber: she puts the connecting plug 27 into the connecting pawl, not shown of the desired subscriber and sends by converting the call key 25 to the left call position, to known Send a call stream into the set of the subscriber to be called and thereby continue whose bell in action. For the time being, however, there is between the plugs 23 and 27 no connection yet, and the two bodies cannot yet connect speak.

When inserting the plug 23 into the interrogation pawl 24 is namely in addition to the connection of the official intercom 26 to the subscriber line 12, 13 still following Circuit closed:

Common battery 28 (which incidentally is identical to battery 18), winding 30 a differential relay 29, contact 32 of a changeover relay 31, tip 33 of the plug 23, Spring 34 of the pawl 24, line 13, hook switch 6 of the intercom 1, receiver 5, microphone 4, branch line 12, spring 35 of pawl 24, neck 36 of plug 23, contact 37 of changeover relay 31, winding 38 of differential relay 29, battery 28.

After the windings 30 and 38 of the differential relay 29 form the iron core of the relay equally strong, but excite in the opposite sense, the armature of the relay is not attracted.

If, however, the officer instructs the participant after plugging in to advance the Counter prompts and the participant 1 depresses the key spring 9, then on the one hand the counting wheel 7 is incremented by one number, but on the other hand the springs 10 and ix the branches 12 and 13 grounded. As a result, the winding 30 of the differential relay 29 is short-circuited and de-energized, see above that the armature of the relay under the action of the winding 38 by the current earth, 28, 38, 37, 36, 35, 12, 9, 10, 11, earth attracted and closes the following circuit via contact 39:

Grounding point 41, battery 18, battery line 40, observation lamp 42, contact 39 of the differential relay 29, holding winding 43, changeover relay 31, body 44 of plug 23, sleeve 45 of switch 24, isolating relay 14, Earth 46.

As a result, the changeover relay 31 comes into action, opens the contacts 32, 37 and closes contacts 46, 47. The subscriber station 1 passes through these in a known manner Way via the plug lines 48, 49, the windings of the transformer 50, 51 and Springs of the query and call key 25 with the connecting plug 27 and herewith after the latter is plugged into the connection jack of the desired participant, with its line in connection, so that the conversation between the two subscriber stations can be started.

After the isolating relay. 14 switched on is, its armature are also attracted and open the contacts 15, 20, whereupon the Call relay 16 is de-energized and the contact 21 opens, so that the call lamp 22 goes out.

Since the holding winding 43 of the differential relay 29 receives current until the Interrogation plug 23 is pulled out of the interrogation pawl 24, there is the one referred to above Talk circuit between the two participants until the connection is canceled.

Instead of the call counter 7, 8, as mentioned, the subscriber station can of course any other auxiliary telephone set, the operation of which by the subscriber to establish the requested Switching is desired from a tariff or other point of view.

In all cases, however, the relevant pre-

direction with the springs 9, 10 and 11 in one such a connection that the actuation of the device and the closing the contact springs can necessarily only be carried out together.

When the telephone set z. B. instead of a call counter with a self-cashier is provided, either the inserted coin must have springs 9, 10 and 11 close, or a special button, lever, etc. be provided, through the movement of which the introduction of the previously inserted coin in the money box and at the same time the closing of the springs 9, 10, 11 accomplished will. This latter. Embodiment is to be used when the office is otherwise known Way can only be called after inserting the coin.

In this case the inserted coin, e.g. B. by pressing a button, only then put in the cash box if the office can give the requested connection and notifies the participant of this, while in the opposite case the thrown in Coin withdrawn by means of the hook switch moved by hanging the receiver or in another suitable manner can be.

Individual parts of the circuit described can of course be changed without the essence of the invention, which in the application of the switching elements described in Wise and for the stated purpose, would suffer a change. So changes the local arrangement of the individual relays depending on the various central switch systems, yes it can even z. B. the differential relay instead of in the plug circuits be arranged in the line circuits; furthermore, individual relays such. B. parts 29 and 31 can also be united without any difficulty after the latter always work at the same time.

Claims (2)

Patent-to sayings: 1. Circuit arrangement for telephone systems with self-cashers or call counters on the subscriber station at which the coin was inserted or the switching of the meter is displayed to the office, and after the complete Preparation of the connection in the office of the closing and opening of the Plug cord circuit regulated by a button located on the subscriber station is, characterized in that for the purpose of relieving the civil servant by simplification the usual switching operations at the office with call counters and self-collecting telephones only at Pressing the increment of the counter (7) located on the subscriber station (1) Button (9) or when inserting the coin into the self-collecting telephone station the plug cord talk circuit (48, 49) by a differential relay via a responsive (29) energized changeover relay (31) during the duration of the speech connection is closed in a manner known per se. 2. embodiment of the circuit according to claim 1, wherein a signal circuit is used to display the operation of the auxiliary device that has taken place at the office, characterized in that the signal circuit (41, 18, 40, 42, 39, 43, 31, 44, 45, 14, earth, 41) through the differential relay (29) itself is controlled, the monitoring signal also serving as a call lamp in a manner known per se A permanent one is appropriate so that the officer can operate the auxiliary machine do not have to wait, but also carry out the determination of the actuation later and in the meantime for others Participants can establish further connections. 1 sheet of drawings.