DE141199C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

There are circuits for telephone exchanges are known in which only after attaching the Remote listeners on the part of both participants respectively the line lines concerned. Relaiswickehingen become currentless and so only then can the final signal take place. But are for this purpose two special relays, which are short-circuited one after the other by the line relay and then drop their anchor, and a special battery is also necessary.

The present invention now achieves the same purpose without the arrangement of the two relays and the battery in that the windings of the line relays are coupled and the Capacitor or the polarization cells after the relay has responded by closing their Contacts are short-circuited so that these relays in parallel during the subscriber call are switched to the speech lines.

The new circuit is shown schematically in the drawing.

A and B mean subscriber stations in whose alarm circuit a direct current interlock pp ¹ (capacitor, polarization cell or the like.) Or a high resistance is switched on. The speech circuit of the same, however, does not contain any interlocking.

The subscriber stations AB are respectively through the lines La ¹ La ² . Lb ¹ Lb ² with the connecting pawls c ¹ to c ^s respectively. d ¹ to d ^{3 of} the Office in conjunction. The call on the part of the participants can be made in any way, e.g. B.

by turning the crank of a magnetic inductor at the participant's.

In addition, the establishment of the connection, etc. jacks as well as call sign and busy control are not considered for the present arrangement and can be carried out in any way. In the drawing, an on-order known design is shown, which switches off the subscriber call sign m ^{1 77Z 2} and the simultaneous application of the control battery BC to the latch body by closing the spring contact 0 when inserting a plug into one of the pawls and thus causing the relay to be excited n ^l n ² bring about permitted.

s ¹ is the interrogation plug, s ² the connecting plug, K ¹ is the capacitor (or polarization cell) switched on during the interrogation, but which is short-circuited during the subscriber call by closing the relay contacts 5 and 7.

-R ¹ is the interrogation relay, jR ² the end signal relay belonging to the connecting plug. The latter also serves at the same time in this circuit shown as an example for wake-up current control, as well as for reporting the appearance of the called subscriber at the device.

R ^s is a switch-off relay which is used to switch off the official interrogation apparatus. The same occurs only as a result of the wake-up current flowing through its winding χ when pressing the wake-up buttons T ¹ T ² and then holds its armature by means of the holding winding j / -

in a known manner until the connecting plug s ^2, which returns to the rest position when the subscriber connection is disconnected, interrupts the circuit of the holding winding that is closed via contact 9. The currents flowing through the wake-up circuit and the holding winding are specified later. As long as current flows through the holding winding j / ·, the contacts 14 and 15 are open and the official remote receiver t is switched off.

held. At the same time, the preparatory contact 16 for the final and control signal relay R ^{2 is} kept closed for the same time.

The final signal relay R ¹ speaks, as it is directly connected to the battery SB , immediately when the plug s ^{l is} inserted into the interrogation latch, opens the signal lamp contact 6 and closes the first contact 5. The final signal and control relay R ² , as well as the signal lamps - feed line 45 do not receive power until the preparation contact 16 closes.

P W is the W ^T represent the Eckstrom generating generator.

Z is a choke coil. These and the windings of the relays R ¹ and R ² , which also act as a throttling on alternating current, prevent the speech currents from entering and thus weakening the electrical circuit of the signaling system.

If subscriber A calls and the flap m ^l falls, the officer inserts the interrogation plug s ¹ into the interrogation latch, e.g. B. in c ³ . As a result of this plugging, the call sign m ^{1 is} switched off as a result of the excitation of the relay / z ¹ , the relay R ^{1 is made} to respond and the official telephonist t is connected in a known manner. To achieve a reliable test, a capacitor K ' ² is connected upstream of this on the one hand. The query circuit now goes, starting from the official remote receiver t , via line 53, contact 14, 5, line 28, 27, capacitor K ¹ , line 26, 25, plug tip, short pawl spring, line La ¹ , switching hook u, subscriber station A, contact 1, subscriber remote receiver v, line La ² , long latch spring, plug neck, line 22, 36, contact 15, capacitor K ² , line 52 to the remote receiver if back.

After the query, the officer pulls the connection plug s ² , whereby the spring contact 9 closes automatically, checks in a known manner and, if the test has shown "free", inserts the plug s' ² into the connection pawl located next to him, e.g. B. if ' ² , of the subscriber to be called B. The officer then presses the call button T ¹ T ² and wakes you up.

The ringing current flows, coming from the generator PW , via line 48, contact 13, line 3i, plug tip, line Lb ¹ , switching hook u ¹ of subscriber station B, contact 4, capacitor p ¹ , alarm clock η> ^λ , line Lb ² , plug neck, line 24, contact 11, line 47, winding χ and line 49 back to the generator.

As a result of the effect of the ringing current in the winding χ, the switch-off relay R ^z picks up its armature and closes via contact 16:

1. the local circuit of its holding winding y, in which the spring contact 9, which was closed earlier when the connecting plug s ^{2 was pulled out, is switched on.} The local circuit of the holding winding y is composed of lines 58, 51, spring contact 9, line 50, holding winding χ, contact 16, lines 56 and 57 back to the battery, starting from the battery SB;

2. the circuit for the signal and control lamp k, namely the same receives power from the battery SB via line 57, 56, contact 16, line 45, 46, contact 8, line 42 and back via lines 43 and 58 to the battery .

Furthermore, by closing the contact 16, the winding of the relay R ^{2 is placed} on one pole of the battery SB , so that this relay receives power from the switching hook u ^{1 of} the station B ^{when the receiver v 1 is} removed from the battery SB via a line 57, 56, contact 16, armature of relay R ³ , line 38, relay R ' ² , line 33, 30, contact 12, line 31, plug tip, line Lb ¹ , switch hook w ¹ , contact 3, remote receiver v ¹ , line Lb ² , plug neck, line 24, contact 10, line 23, 22, 34, choke coil ^, line 35, 58 back to the battery.

As soon as the called subscriber B picks up his remote receiver v ^l , the switch hook u ^l closes the contact 3, the relay R ² responds and the signal k goes out as a result of the opening of the contact 8. At the same time, however, a short circuit of the capacitor (polarization cell, etc.) K ¹ occurs as a result of the closure of contact 7, via lines 26, 29, contact 7, lines 40, 39, contact 5, lines 28 and 27 back to the capacitor. Since, as a result of this capacitor short circuit, the plug tip line 25 is connected directly to the plug tip line 30, 31, the winding end 32 of the relay J? ¹ in direct connection with the winding end 33 of the relay R ² permanently connected to the line 30. The relays R ¹ and R ² are thus simply connected in parallel.

The speech circuit is then as follows:

From the remote receiver ν (or induction coil) of station A, the speech currents flow through contact 1 and switch hook u, line La ¹ , tip of plug s ¹ , line 25, 29, contact 7, line 40, 39, contact 5, line 28 , 30, contact 12, line 31, tip

Claims (2)

of the plug s ² , line Lb ¹ , switch hook w ¹ of subscriber B, contact 3 and remote receiver v ^{1 of the} same, line Lb ² , neck of the plug s ² , line 24, contact 10, line 23, 22, 21, neck of the plug s ^l and line La ² back to the remote receiver of subscriber A. The final signal consists of a simultaneous glowing of both final signal lamps / and k. As is well known, the same thing happens entirely ίο automatically when the subscriber remote receiver ν ν ^{l is} reattached as a result of the switching hook uu ^{1 being switched} to the rest position, switching off of the remote receiver resistance and switching on of the direct current locking ρ ρ ¹ , whereby the currents flowing through the relays R ¹ and R ^{2 are} interrupted and the relays are de-energized, see above that the armature of the same return to its rest position and the contacts 6, 8 close. As stated above, the end signal relays R ¹ R ² cannot come into effect individually and separately from each other, and since they are connected in parallel to both plug tips, they cannot be influenced by a single subscriber station, but rather cooperation is required for the automatic closing signal both subscriber stations. Only at the moment in which the switch hook of the second station is also put into rest position by the remote receiver, both relays R ¹ and R ^{2 are} de-energized and release their armatures, whereby contacts 6 and 8 are closed and both lamps / and k are closed at the same time be made to glow. The current that causes the lamps to glow flows from battery SB via line 57, 56, contact 16, line 45, from where it branches, once via line 46, contact 8, line 42 to lamp k and the other time via line 44, Contact 6 and line 41 to the lamp / to flow back via lines 43 and 58 to the battery SB . If the officer sees when both lamps / and k light up that the conversation has ended, he releases the connection and puts the plugs s ¹ and s ² in the rest position. Here, the plug s ² opens the contact 9 again and thereby interrupts the holding winding y of the cut-off ^{relay JR 3} , the same is de-energized and its armature falls off. The falling armature opens contact 16, whereby both lamps / and k go out, and by closing contacts 14 and 15 switches on the official remote receiver t again. The system is then returned to its rest position. Patent-A ν proverbs: ι. Circuit for telephone exchanges with automatic final signaling after attaching the remote receiver on the part of both participants, characterized in that contacts (5 and 7) are closed by the armature of the final signal relays (R ¹ R ² ) in such a way that the bridged by a capacitor (K ¹ J, Relay windings lying in the plug tip line are connected in parallel to each other after lifting the remote receiver of both participants. 2. Embodiment of the circuit according to claim 1, characterized in that At the same time as the relay windings are connected in parallel, a capacitor (or polarization cell) connected between them is short-circuited. 1 sheet of drawings.