Arrangement for maintaining the synchronous operation of telegraph apparatus

Claims

Contact 13 is made. As soon as the armature 10 of relay 2 comes into contact with contact 12, the winding 15 of relay 14 receives current. the path 11, 10, 12, 16, 15, ii, so that the anchor 21 comes into contact with contact 20. The correction series shows an arrangement such that contacts 32 and 33 are alternately connected to each other, with each contact group The control relay 22 is connected via lines 27 and 26. All individual contacts 32 and 33 share a common contact. in front, which is connected to the armature 21 of relay 14. The armature of control relay 22 is connected to ground via battery 23. This The armature oscillates between two contacts, one of which serves only as a stop, while the other is in contact with the winding of magnet 24. The connection is such that its anchor can strike an intermediate piece 28 against the tuning fork 7 for a purpose described below. The common point of the windings of relay 22 is connected to ground via resistor 25. Assuming that the transmitting and receiving apparatuses are operating identically, then on both, the brush holder 9 guides its brushes over the contacts of the Correction series in the same time period clear out. ■ Suppose, however, that for some reason the phonic wheel 4 lags behind the phonic wheel at the transmitter site, and that If a positive current pulse (35) flows through the transmission line, the following processes will occur: A positive current pulse, which travels through the Line relay 2, when current flows, will cause the armature 10 to leave contact 13, come into contact with 12, and thus complete a circuit from battery 11. via armature 10, contact 12, resistor 16, winding 15' of relay 14 to the battery. As a result, armature 21 comes into contact with contact 20. However, until the armature 21 detaches from contact 19, the following current path will be closed for a brief moment: From battery 11 via Anchor 10, contact 12, line 29, contact 19, anchor 21, line 17'. This current path is complemented by the common contact of the Correction series, brushes, via a contact of a group of the correction series, e.g. 32, line 27, via a winding of the - Control relay 22, resistor 25 to ground and from there back to battery 11. Under the influence of this circuit, the armature of the Control relay 22 comes into contact with its working contact, thus activating the electromagnet 24 in the battery circuit. Include 23. The excitation of the magnet 24 causes the intermediate piece 28 to come into contact with the tuning fork 7 under the influence of the anchor and shortens its deflections, so that the frequency of vibration of the tuning fork 7 and consequently the speed of the phonic wheel 4 increases. The latter wheel' will run faster immediately. This occurs when, during a change in the direction of the line pulses, the armature 10 of the line relay 2 is under the influence of a negative When the impulse leaves contact 12 and comes into contact with contact 13, the armature 21 of relay 14, which was in contact with contact 20, is moved to Contact 19 is closed. However, before 21 can close, a current path exists between earth 11, 10, 13, 20, and 21. If synchronization is not yet present, this current path is completed in the same way as described above, so that the phonic wheel receives further drive. However, if the receiver now precedes the transmitter, a different completion of this current path occurs, since the contacts rub against one of the contacts 33. In this case, the current through earth 11, 10, 13, 20, 21, 17', 33, 26, relay 22 (left winding), 25, and earth returns relay 22 to its rest position. Consequently, the electromagnet 24 is not re-energized, and the stop 28 does not act on the tuning fork 7. The processes described above only occur if the brushes remain at the receiving station, and only if the current in the transmission line changes its polarity. The arrangement allows for fine correction using the simplest of means. Patent claim: Arrangement for maintaining the synchronous operation of telegraph apparatuses that operate with signal pulses of alternating direction, characterized in that, in the receiver, under the influence of the signal pulses during the current change in the long-distance line, a current path is prepared for a short period of time (earth, 11, 10, 12, 29, 19, 21, 17' or earth, 11, 13, 20, 21, 17'), which only then finds its "complement" (17', 32, 27, 25, earth) and causes a short-term acceleration (by means of 24, 28, 7) for the drive device (4) of the receiver, if the receiver lags behind the transmitter. This includes one sheet of drawings.