DE664123C - Arrangement for automatic phase adjustment of message sending and receiving devices with uniformly rotating contact arms - Google Patents

Description

The invention relates to known contact arms with uniformly and synchronously rotating contact arms provided telecommunication devices, in which the synchronization of the contact arms of the transmitter with those of the receiver before Start of the news broadcast by informing the two operators must take place, so not automatically synchronous operation by sending control pulses can be produced. However, once the correct phase position has been reached, the further regulation is carried out automatically in the event of minor deviations.

In the arrangement according to the invention

i _{S in} addition to the known differential circuit, which operates with a three-part contact, for forward and reverse switching of the distributor arm, a special contact ring is arranged. If the phasing of the distributor arm is incorrect, this contact ring receives the control pulses for phase adjustment before the start of the transmission of useful characters. It passes these impulses on to the adjusting switching mechanism until the distributor arm has left it and has switched to the actual phase correction contacts. In the correct phase position, which is reached when the distributor arm is positioned on the center piece of the three-part contact, a drop-out delayed relay is switched on by the control pulses; this opens a contact in the circuit between the contact ring and the adjusting switchgear. This interruption of the normally closed contact ensures that, after the three-part contact now ensures the phase setting, the time in which the contact ring is passed over by the distributor arm can be used for the transmission of the useful characters. In this way, when the receiver is put into operation, the correct phase position can be achieved in the shortest possible time and, after the start of the character transmission, despite similar impulses for synchronization and characters, these over the parameters that are required for you. conduct correct separate contacts - only the position of the contact arm changes without affecting the speed of the drive motor.

In the drawing, the invention is shown at 5 » for example shown.

In the transmitter, a commutator ring 1 has a control contact 2 and a number Character contacts 3. The contact controlling the synchronization is via the line 4, a battery 5 and the line 6 with

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a long-distance transmission path, ζ. B. the indicated by the rectangle 7 transmitter connected. Also connected to this via line 8 is the "ro?" running arm 9. M * ■ '.

Every time the with uniform ($ £ - speed rotating contact arm 9 sweeps over the "contact 2", a control pulse sent out.

During each revolution, the collector arm 9 also passes over the in a certain order Character contact, which by means of known, not shown devices can also send out impulses. The antenna 11 is with the receiver the amplifier 12 and this via the line 13 with the battery 14 in connection. From this the line 15 leads to the shaft 20 ° with the contact brushes 17 and 18. Die Brush 18 passes over the character contacts 26 on the disc 27, while the Brush 17 is only intended for synchronization and is on a contact ring 22 the insulating disk 21 rotates. The ring 22 is made up of three individual contacts 23, 24, 25 interrupted.

Each character contact 26 on the Disk 27 corresponds to a character contact 3 on the commutator ring 1 on Channel. The position of contact 24 corresponds to control contact 2 on the transmitter.

When a transmission begins, only the control pulses, i.e. no character pulses, are transmitted. If the control pulse now arrives at the receiver when the brush 17 is in contact with the ring 22, the relay 35, which incrementally advances the arm 16, is energized in the following circuits: battery 14, line 15, shaft 28, 20 ^e , contact arm 16, 17, ring 22, contact 32, armature 33. of relay 60, line 34, relay 35, line 66, line 13. The relay 35 attracts its armature and causes a switching step of the contact arm 16 by means of the pawl 36, 37 and the wheel 38. This process is repeated until the brush 17 has left the ring 22 and is on the contact 23. When a control pulse acts on this contact, the contact 32 and the armature of the relay 60 are bridged by the connection 54. The progressive effect, however, is the same, and the arm reaches contact 24. In this position, the transmitter and receiver have the same phase position. If the control pulse now acts on this contact 24, the signal lamp 62 is excited via line 59, relayöo, line6i, lamp62, line 63 to show the operator that the transmitter and receiver are in the same phase. If the speeds at the transmitter and the receiver are different and the brush 17 remains behind again, contact 23 is closed again and the corrective feed is effected by the next control pulse. If, however, the contact "AFIRM of the receiver to the transmitter precede, ^'" as the brush is reach 17 to the contact 25. Upon receipt of a control pulse is then energized the relay 56 via the line 55, which by means of the pawl 36 "., 37 "and the wheel 38 ^a causes a reverse rotation and adjusts the contact brush accordingly.

As long as the control pulse arrives in the correct phase position of the brush 17, causes he excitation of relay 60 with every revolution. This relay is dropout delayed, thus holds during his state of excitement the contact 32 is opened so that the character pulses are not influenced of the relay 35 can cause. The drop-out delay is so great that the downshift of z. B. on the contact 25 shifted contact arm 16, 17 in the position 24 can take place with certainty and not disturbed by character pulses will.

Claims (2)

Patent claims: i. Arrangement for the automatic phase adjustment of message sending and receiving devices with uniformly rotating contact arms that move over a contact ring that is interrupted on the receiver side by three adjacent segments, the middle of which corresponds to the correct phase position, while the other two in regular succession In the case of a slight phase deviation, the transmitted control pulses act forwards or backwards on a differential circuit to switch the contact arm up or down step by step, characterized by the simultaneous application of the following features: In the case of a phase deviation beyond the correction segments (23, 25), during which no useful characters are transmitted, the contact ring (22) is electrically connected via the normally closed contact (32, 33) of a drop-out-delayed relay (60) to the stepping mechanism (35 to 38) switching the contact arm (16, 17) forward; the control pulses actuate this switching mechanism until the contact arm (17) has reached the correct phase position between the two segments (23, 25) which cause the upward and downward switching; in this position (24) opens the 120 ^l drop-out delay relay (60) under the influence of the control pulses its contact (3 ² J 33)) which made the connection with the contact ring (22). 2. Device according to claim 1, characterized in that in which the delayed fall Relay (60) exciting ^! Circuits (59, 61, 63) a signaling device, e.g. B. a discharge tube is provided which responds to the control pulses when the circuit is closed. 1 sheet of drawings