DE1053026B - Electronic telegraph receiver - Google Patents

Description

The invention relates to an electronically operating telex receiver, the input stage as an Eocless-Jordan flip-flop is implemented. Furthermore, a series storage facility is a time base and an evaluation stage connected to the output of the series storage system is provided. The receiver according to the invention is for the reception of telegraphic characters in telex code the conditions prescribed by the regulations of C / C / I / T for international telex communications certainly.

The essence of the invention is that the telegraph steps from the line in the per se known series storage stages feeding input stage is connected to the reset circuit, which the last stage of the series storage system resets to the idle state and this last stage on the one hand via the resistor divider to the time base, the keying of which takes care of this stage, on the other hand via a capacitor and a resistor is connected to the reset stage, the anodes of which are connected to the reset stage a capacitor to the common grid entrance of the lower systems of all other stages of the series storage system are connected and an evaluation circuit, consisting of this storage system consisting of stages and evaluation relays, and the stage is connected to the last stage, which delays the response of the pulse relay for safe operation of the evaluation circuit, in that this stage is controlled by a monostable multivibrator, which the duration of the pulse in the Winding of the printing electromagnets of the printing device of the receiver controls.

Further points of the invention relate to the particularly expedient design of details this electronically working telex receiver.

The drawings show an embodiment of the invention in which hot cathode tubes are used ¹ .

Fig. 1 is the block diagram of the electronic receiver according to the invention;

2 shows the circuit arrangement of the series storage system with the input stage and the reset stages;

Fig. 3 shows the circuit of the time base used in the receiver according to the invention;

Fig. 4 shows the circuit arrangement of the evaluation element with the for printing the received Telegraphic characters determined the printing device's electromagnets.

As can be seen from Fig. 1, the receiver according to the invention consists of an input stage, a series storage system, a time base which the

Electronic telegraph receiver

Applicant:
Tesla, narodni podnik, Prague-Hloubetin

Representative: Dipl.-Ing. A. Spreer, patent attorney,
Göttingen, Groner Str. 37

Stanislav Susicky, Prague,
has been named as the inventor

Control pulses for the in-line storage system supplies, an evaluation element and a printing device.

Fig. 1 also shows the final stage reset circuit the series storage system and the reset circuit of its other stages, the reset circuit of the sixth stage the in-line storage system is coupled to the input stage of this system.

The in-line storage system of the receiver is shown in FIG. It is known per se (and switched according to German patent application T 12056 VIII a / 21 a *). It consists of six bistable electronic multivibrators .E ₂ to..E _{7 of} the Eccles-Jordan type. These stages are connected in series to one another by a coupling which is formed by a symmetrical delay line. The balanced delay line consists of four suitably equal resistors and a capacitor connected in parallel, as described in the patent mentioned. In Fig. 2, the individual delay lines with R ₁₉ , R ₂₀ , R ₂₁ ,

53 '

53 56 5T 5 & i 65 68 69 lü 5

net. This coupling alone cannot change the state of the following stage. However, in the Lattice circles of the tubes from the time base supplied short control pulses, which the positive feedback the tilting circles, d. H. cancel the bistable character of the steps, the step loses its own original state, and after the cessation of the impulse from the time base, this stage takes over the state determined by the coupling of the delay line from the preceding breakover circuit.

The input stage B ₁ is an Eccles-Jordan circuit with transformer coupling Tr ₁ to the line. The series storage system is connected to the input stage through the resistor coupling R _g , R ₁₀ . The reset circuit of the sixth stage E _{7 of} the storage

809 770/198

3 4

system, which is formed by the differentiating circuit consisting of a resistor R ₉₇ , level coupling to the outputs of the individual Glieeinem capacitor C ₆ and a rectifier element of the series storage system and to the anode -the G ₁ . Tube of level E ₁₄ (lower system) of the sixth brings this level E _{7 back} to the rest position (level B _{7 of} the storage system (connections 5,4,3,2, 1 ₁ 0) upper tube of level B ₇ conducts electricity) when the 5 paired. The grid of the left electrode system input stage through a starting pulse in that of stage E ₁₂ is through the resistance i? _{103 is} tilted to the character position (the lower tube of the stage first link of the relay storage system is coupled (to E ₁ conducts. Current). When tilting the sixth stage, end 5). The grid of the right system of the same increases the voltage at the anode of the lower tube stage E ₁₂ is through the resistor -R ₁₀₅ to the second of the stage E ₇ (after the resistor R ₇₈ ) . Connected to the io stage of the series storage system (on-differentiation pulse opens for a moment, end 4). The grid of the left and right electrode tube of stage E ₈ , which is the reset circuit for the system of stage E ₁₃ , forms the remaining stages of the storage system through the resistance. By i? _10g or i? _{114 is connected} to the third or fourth stage of the storage system created at the anode of the tube of stage E ₈ (connection 3, 2). The first to the fifth 15 grids of the left tube of stage E ₁₄ are tilted by the stage of the series storage system (stages E ₂ to E ₇ ) in resistance i? ₁₁₈ to the fifth stage of the series, the rest position; the upper tube At the same time the voltage grid of the right tube of this stage E _{14 is connected to the resistor 2? 123} with the sixth stage of the series stage via the anode of the lower system of the tube E ₇ (connection T) the control oscillator of the time storage system is connected (connection 0). The grid base is scanned. The outputs of the series memory of the tubes of the stages E ₁₂ , E ₁₃ and the left tube system are marked with 5., 4, 3., 2, 1, 0. of stage E ₁₄ are through the resistive coupling

The time base (Fig. 3) is determined by the control oscil- i? ₁₀₄ , 2? ₁₀₅ , i? ₁₁₀ , i? ₁₁₃ and i? ₁₁₉ connected to the anode of the right-lator having a frequency of 50 Hz and a circular tubes Step E _14th For the transformation of the sinusoidal voltage in the anode of the left system of the first tran ^ lation, a rectangular one is formed. The control oscillator (stage tube of stage E ₁₂ are the evaluation relays A E ₁₀ ) consists of a two-stage amplifier with and E connected / to the anode of the right a selective i? C element (resistors R ₈₉ , R ₉₁ , tube system of this stage E. ₁₂ are the evaluation R ₉₂ and capacitors C ₁₁ , C ₁₂ , C ₁₃ ). The control relay ' D and / connected. The anode of the left oscillator is essentially a cathode sequence system of the second translation _{tube of stage E 13} (right tube of stage E ₁₀ ) and a relay H and C are connected. The cathode circuit (left tube of stage E ₁₀ ) is connected to the anode more strongly in a grid-based circuit with coupling in the des - right tube system of stage E _13. Since the evaluation relays B and G and the anode of the gain value are several times greater than the span-link system of stage E ₁₄ , the evaluation loss is at the mentioned selective element, via relay E connected. The right tube system that the value of the input voltage at the grid step E ₁₄ forms a coincidence circle for the transducer cathode follower circuit the limit of the linear lationsröhren (first and second translation stage E ₁₂ , characteristic curve of the tube, and the output voltage, the E ₁₃ and left tube system of the third is trans Originally sinusoidal, is determined by the exhaust lationsstufe e ₁₄₎ of the evaluation relay a to I. the point of separation of the anode current and by the 40 evaluation relay a to I obtained a surge area of the grid current cut off such that only when the level in question of the The series of stresses becomes rectangular. Due to the change storage system in the "rest position" and if the voltage at the amplifier grid is in its sixth stage at the same time from the rest position - the grid base circuit changes the position of the working position. At the moment when the sixth point on the characteristic curve 45 step is tilted out of the rest position corresponds to

In this way the keying of the control oscillator is solved - namely the setting "of the individual stages of the gate for a start-stop synchronization from the resistor 50 connected to the sixth stage E _{7 of} the monostable trigger circuit of the Röhne of stage E ₁₆ ge series storage system. This circuit determines the pulse duration derived from the voltage divider R ₈₅ -R _86. The output windings of the pressure magnets, their switching The voltage of the control oscillator is shown in the lower half of Fig. 4. Through the capacitor C ₁₄ and the resistors R ₉₅ and the resistor coupling R ₁₃₀ , the tube R ₉₆ masters the existing coupling to the circuit for converting the stage E ₁₆ the translation tube of stage E ₁₅ - the sinu'sföxrniigen tension in a rectangular 55 (right system) de s Pulse relay K. The circuit conducted. This circuit is formed by a cathode of the left system of stage E ₁₅ is used for delay-coupled flip-flop circuit (stage E ₁₁ ). The initiation of the response of the pulse relay K, at time rectangular control pulses are circulated by the circuits formed by the contacts of the capacitor C ₉ and resistor R ₈₂ in the grid evaluation relay A to / for the safe closing of the tube of the stage E ₉ (Fig. 2) existing coupling 60 win. The actual evaluation groups of the development are differentiated. The negative impulse is suppressed. Pressure magnets are a binary combination circuit, and the contacts of the relays A to / appear at the anode of this tube. According to the setting of mere differentiation pulses with an interval from this relay, the path becomes only a single 20 ms. These pulses control (connection 5) the series pressure magnet is prepared, and the circuit closes spe ichera nlage according to Fig. 2. 65 via the contact of the pulse relay K. At the same time

The evaluation circuit (Fig. 4) converts the output, the circuits of the holding contacts of the output criteria (connections 5, 4, 3, 2, 1, 0) of the series evaluation circuit are also closed. The evaluation element is ■ storage system in impulses of the windings of the pressure with a storage relay P for the number and magnets. The stages E ₁₂ , E ₁₃ , E ₁₄ , which provide the letter changes. This relay takes care of the evaluation relays A to / control, are through an electrical 70 electrical differentiation between the book-

Claims (6)

sticks D and the "Wer dä" sign and between the letter J and the bell signal. In FIGS. 2, 3 and 4 the source of the anode voltage is denoted by -Va and the source of the grid bias voltage is denoted by -Vg. As already mentioned, the in-line storage system has a total of six stages for the individual steps of this telegraphic symbol. The input stage of the series storage system follows the states on the receiving line, and when the idle state is first converted to the character state, it energizes the reset circuit R79, C6, G1 of the sixth stage E7 of the series storage system. The keying of the time base and the reset circuit of the other stages of the series storage system are coupled to the sixth stage of the series storage system (cf. FIG. 1). In the idle state, the states which correspond to the individual pulses of the previous received character are registered in all stages of the series storage system. The first to fifth stages E2 to E6 of the storage system store the character of the fifth to first combination step; the sixth stage E7 has switched to the state which corresponds to the character of the starting step. The time base is in the rest position. At the beginning of the reception of a new step combination (start step), the reset circuit R79, C6, G1 of the sixth stage E7 of the series storage system is energized, which brings this stage back to the idle state. When the sixth stage returns to the idle state, the reset circuit -E8 of the other stages E2 to E6 of the storage system is also energized, and these elements are returned to the idle state. The in-line storage system is prepared to receive a new step combination. The time base is continuously scanned, and after a period of 10 ms (half an oscillation of the time base equals half of a standard pulse) the time base begins to send out control pulses for the serial memory system at an interval of 20 ms. At the moment the telegraphy steps arrive, the in-line storage system takes on the states of the input stage and progressively forwards them to the next stages. The first step is to move the start step. In the sixth step, the state corresponding to the start step is transferred to the sixth stage E7 of the series storage system. This level is now tipped out of the resting state. At this moment the time base comes to a standstill and the received step combination is registered in the individual stages of the series storage system. The parallel outputs 5 to O from the individual stages of the series storage system (Fig. 2) are fed to the evaluation circuit (Fig. 4), and this evaluates the received step combination into a pulse in the corresponding pressure electromagnet Fig. 4) of the printing device. The electronic receiver according to the invention can be used directly as part of a telex for normal telex traffic. The receiver works with a telegraph speed of 50 Bd and can evaluate the telegraph characters at a maximum telegraph speed of 428.4 letters per minute. From a production point of view, the advantage of the receiver according to the invention is that it uses common components of telecommunications technology, which for the most part can be mass-produced automatically. In contrast, the previous mechanical solutions lead to very complex constructions which require a large number of different precision components. The electronic receiver according to the invention achieves a much better quality of telegraphic transmission. The margin can practically reach the theoretical limit of 50%, since the order of magnitude of the sensitive moments necessary for the overturning of the electronic tilting circles is shorter than the length of a unit pulse. The time periods required to control the electronic stages are therefore much shorter than the times required to control mechanical or electromechanical components. ΡαΤΕΝΙΛΝSPKOCHE: 1. Electronic telegraphy receiver, the input stage of which is designed as an Eccles-Jordan flip-flop with a transformer coupling to the receiving line, with a series storage system, a time base and an evaluation stage connected to the output of the series storage system, characterized in that the telegraphy steps from the line in the per se known series memory stages (E ₂ to E ₇ ) feeding input stage (E ₁ ) is connected to the reset circuit (R ₇₉ , C ₆ , G ₁ ) , which the last stage (E ₇ ) of the series memory system (E ₇ ) in the Rest state and this last stage (E ₇ ) on the one hand via the resistor divider (• ^ 86 * ^ s ₅ ) ^{to the} time base (E ₁₀ , R ₈₉ , R ₉₁ , R ₉₂ , C ₁₁ to C ₁₃ ), the keying of this stage concerned, on the other hand via a capacitor (C ₁₀ ) and a resistor (R _8i ) is connected to the reset stage (E ₈ ), the anodes of which via a capacitor (C ₇ ) to the common grid input of the lower er systems of all other levels (E ₂ to E ₆ ) of the series storage system (levels E ₂ to E ₇ ) are connected and an evaluation circuit consisting of levels (E ₁₂ to E ₁₄ ) and evaluation relays (A to T) are connected to this storage system and the last stage (E ₁₄ ) is followed by stage (E ₁₅ ), which delays the response of the pulse relay (K) for safe actuation of the evaluation circuit (A to /) by adding this stage (E ₁₅ ) to a monostable multivibrator (E ₁₆ ) is controlled, which the duration of the pulse in the winding of the pressure electromagnet (Fig. 4) controls the recipient's printing device. 2. Electronic receiver according to claim 1, characterized in that the reset circuit (R ₇₉ , C ₆ , G ₁ ) of the last stage (E ₇ ) of the storage system is designed as a differentiation circuit. 3. Electronic receiver according to claim 1, the time constant of which is formed by a control oscillator and a circuit for converting a sinusoidal voltage into a rectangular one, characterized in that the control oscillator is connected as a two-stage amplifier (E ₁₀ ) which consists of a cathode follower circuit and an amplifier in grid base circuit with a selective i? C element (R ₈₉ , R ₉₁ , R ₉₂ , C ₁₁ to C ₁₃ ), and the control grid of the amplifier in grid base circuit through a voltage divider (R ₈₅ , R ₈₆ ) to the last stage ( E ₇ ) of the series storage system (E ₂ to E ₇ ) is coupled and the stage for converting the sinusoidal voltage into a rectangular one is designed as a cathode-coupled breakover circuit (E ₁₁ ). 4. Electronic receiver according to claim 1, characterized in that the first two stages (E ₁₂ , E ₁₃ ) and the left tube of the third stage (E ₁₄ ) control the evaluation relay (A to /) and through a resistor coupling to the outputs of the individual elements of the series storage system and to the anode of the right tube of stage (E ₁₄ ) of the last stage (E ₁ ) of the storage system and the mentioned right tube of stage (-E ₁₄ ) a coincidence circle for the preceding stages (E ₁₂ , E ₁₃ ) and left tube of stage (E ₁₄ ). 5. Electronic receiver according to claims 1 to 4, characterized in that the Contacts of the evaluation relays (A to T) are arranged in a binary combination circuit which forms the electrical circuits (Fig. 4) for controlling the printing electromagnets of the printing device. 6. Electronic receiver according to claims 1, 4 and 5, characterized in that a memory relay (P) is attached to the circuit of the contacts of the evaluation relays (A to I) , through which the switching of the auxiliary functions at the digit conversion (e.g. from the pressure magnet ( J) on the doorbell or by a pressure magnet (D) on the magnet for the sign "Whoever there"). For this purpose 2 sheets of drawings ■ © 809 770/198 3.