DE1079671B - Circuit arrangement for the accelerated transmission of stored telex characters - Google Patents

Description

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In the case of telex connections, it is known, with the help of the multiple use of the transmission paths, for example, AC telegraphy, to transmit two or more messages at the same time.

Now and then it is necessary that one or the other message should be transmitted particularly quickly. This is possible according to the invention with the aid of a circuit arrangement for the transmission of telex characters between two memory devices operating at increased telegraph speed and located remotely from one another via a transmission path operating at normal telegraph speed in such a way that a transmission switchover device located in the transmission point cyclically transfers the telex characters from the transmission memory Sequence to one transmission buffer in parallel operation that a transmission distributor individually assigned to each transmission buffer stores the telex characters temporarily stored in each transmission buffer via separate transmission paths and via a start-stop-synchronized reception distributor, which is individually assigned to each transmission path, in a receiving buffer memory in series operation directs that a reception switching device buffered in the reception memories en telex characters to the receiving memory in parallel operation, and that with η separate transmission paths the individual transmission distributors by -r-

their work cycle, e.g. B. their rotation, are out of phase with one another.

Further details of the invention can be seen from what is described below and in the drawing embodiment shown in principle. In.

Fig. 1 the transmitting part and in

Fig. 2 shows the receiving part of a transmission system drawn as a circuit diagram

In the AC telegraph training device WT shown , two channels are used to transmit a single message. formed by the drive motor SAn drivable transmission distributors SVA and SVB . The punched tape transmitter, ^ is designed as a so-called step transmitter, from which all combination steps can be scanned at the same time. The punched tape transmitter iS \ S contains the scanning switching contacts ss 1 to ss5 Line with one contact each of one of the two parts SUA and SUB be circuit arrangement
for accelerated transmission
stored telex characters

Applicant:
Siemens Sd Halske "Aktiengesellschaft,

Berlin and Munich,
Munich 2, Wittelsbacherplatz 2

Walter Demant, Munich,
has been named as the inventor

standing transmit switch in connection. The other side of these contacts is in each case connected to a storage element of the transmission memory SpA or SpB formed from a series circuit of one of the capacitors SpAC or SpBC and one of the resistors W. The transmission manifold \ S "Fyi the channel yi of the transmitting device -contains the eight cams SAA, SlA to S5A ₁ ssta and shual and their associated ^contacts; the transmission distributor SVB of the B channel is analog, discs with the eight cam 'SAB , SlB to 5 "5 B SStB and SUBl and the contacts assigned to them. The cam disks are drawn unwound and run in the direction of the arrow. In this case, those belonging to channel A are effective with a phase shift of 180 ° with respect to those assigned to channel B. So if the send distributor SVA at time zero with; starts running at the first teletype character and. for one revolution corresponding to the duration of a telex character with a one and a half lock step. 150 ms, the transmission distributor SVB only begins to take effect at the time 75 tns and ends the transmission of the second character at the time 225 ms. During the locking step, which is determined by the camshaft giberiJvS'i ^ i or SStB ", and during part of the start-up step , one of the relays Λ4 or StB is additionally excited via the cam disks SUA1 or SUB1 and controls its contact stA or StB in the circuit of the release magnet SAM of the punched tape transmitter v5 \ iT and its contacts sta or stb for each telegraphing step. These contacts sta and stb connect in this way the contacts ss 1 to ss5 for about 40 ms from the beginning of the blocking step

909 7TO / 189

the step transmitter 6 "^ to the associated storage elements of the transmit memory SpA and during a shifted by 180 ° rotation phase of the transmission manifold in a corresponding manner, the memory elements of the transmit memory SpB. In this case, however, the charging of the storage capacitors SPAC remains if one first considers only the channel of the transmission memory SpA received so long until they can be discharged individually one after the other via the transmission distribution contacts controllable by the cams SlA to 6 "5 ^ i and the transmission relay SRA and change this according to their charging into the character position or not.

In detail, a start-up step of 20 ms duration is generated by the rotating transmission distributor SVA after its zero crossing, initially by the cam disk SAA. Thereafter, depending on the polarity of the charge of the five storage capacitors SpAC, the relay SRA is energized one after the other according to the five characteristic telegraphing steps (combination steps), and a blocking step of 30 ms duration is added with the aid of the cam disk SStA. The telex character scanned in parallel from the punched tape in the punched tape transmitter 6 "6" is entered into the memory SpA via the transmission switch SUA and converted into a start-stop character transmitted in series by means of the transmission distributor SVA and the transmission relay SRA. The contact srA of the transmitter relay SRA scans the alternating current telegraphy transmission device in a known manner, which forwards the telex character to the remote station. In the same way, however, shifted in time by 75 ms, the contacts controlled by the cam disks SlB to S5B influence the transmitter relay SRB assigned to channel B according to the scanning result of the second row of holes of the Lochstr.eifensender 5 "J ?. This type of transmission is continuously in the The manner in which the 1st, 3rd, 5th, etc., characters of a sequence of telex characters are routed via channel A and the 2nd, 4th, 6th, etc. characters via channel B are passed on.

The receive distributor, with its parts BVA and EVB, has a very similar structure to that of the transmit distributor. Only the drive takes place start-stop-wise for each of the parts BVA or BVB separately by the clutches AnA or AnB, which can be controlled separately via the release cams EKA or EKB and the release magnets AMA or AMB , from a common drive motor. In this way, time differences between the two fFT transmission channels A and B can be taken into account. The cam disks E 1 A to E 5 A, ElB to E5B of the receiving distributors E VA and EVB corresponding to the cam disks 5 ″ IA to S5A and SlB to S5B are only kept much shorter; in addition, the cycle time of the receiving distributors is somewhat shorter than that of the transmitting distributors and is, for example, 132 ms. The cams scan the middle of the received combination steps and route them one after the other to the reception relays ERIA to ER5A or ERIB to ERSB, which are combined in parts EpA and EpB of the reception distributor and assigned to the individual combination steps As soon as the receiving relay ERA located in the output of the AC telegraph transmission system is excited by a starting current step, the tripping magnet AMA can attract its armature. The receiving distributor EVA begins to run. After about 110 ms, all five combination steps are certain to arrive; therefore, approximately simultaneously with the entry of the locking step the relay StA over, de The contact assigned to the EStA cam is energized. In the meantime, for example 75 ms after the start-up current step in the relay ERA, the relay ERB has in turn received a start-up current step via channel B. The reception distributor EVB is thus also set in motion in a corresponding manner. In the one built according to the switchover device SUA or SUB on the transmitting side and similar

ίο switched switchover device EUA or EUB , the five connection contacts stA 1 to staA 5 or stB 1 to stB 5 of the associated reception control relay StA or StB can be jointly controlled for each channel. The movable springs of the contacts st Al to stA 5 and StBl to stB 5 of the switching devices EUA or EUB are connected in pairs to one another and to one of the punching magnets SMl to SM5 of the receiving hole punch ESL , which are simultaneously effective for all five combination steps. So the device is available as a

ao step holes trained. It is switched on in the same way as in the case of the punched tape transmitter viuS ¹ with the help of the two parallel-connected contacts in the control circuit of the photo switch magnet LM; the contact stA is from the relay StA and the contact

The stB can be controlled by the relay StB. The relays STA and STB are energized at the correct time by the cam disks EStA and EStB . As the circuit diagram together with the description above shows, the receiving hole, ESL at the end of each telex character, i.e. in the blocking step, actuates the five punching magnets set one after the other via the connection contacts stA 1 to stA 5 according to the positions of the relay contacts he IA to he 5A SM1 to SM 5 at the same time. Before the first half turn of the distributor cam disks has been completed, the process described for the channel has expired. With z. B. 75 ms phase shift, the reception and conversion of the next telex to the punched tape takes place in the same way via channel B.

The scanning of the perforated strip passing through the punched tape transmitter 6 * 5 is therefore carried out at twice the speed compared to normal operation, and the receiving perforated strip is also punched at double speed with the aid of the receiving perforator ESL , and an AC telegraphic transmission device is used for transmission at normal running speed and with start-stop -Synchronization used.

If it appears necessary, for certain reasons, the telex character duration on the transmission lines to leave the system the same and to increase the effective overall transmission speed, so you can within the scope of the invention with the involvement of additional reversing means and several Send and receive distributors also operate a facility, usually with more than two Channels working together. Here, too, in the context of the invention, the transmission distributors have only one source Storage device and the receiving distributor with only one receiving storage device, e.g. B. on both sides with Punched tape devices connected. In the context of the invention, other such. B. electronic Distributors of known type, can be used.

Claims (1)

Claim: Circuit arrangement for the transmission of telex characters between two with increased telegraph speed working, away from- mutually arranged memory devices via a transmission path operating at normal telegraph speed, characterized in that a transmission switchover device (SUA ₁ SUB) arranged in the transmission station (Fig. 1) sends the telex characters from the transmission memory (SS) to a transmission buffer (SpA ₁ SpB ) passes on in parallel operation that a transmit distributor (SVA, AVB) individually assigned to each transmit buffer (SpA ₁ SpB) stores the data in each transmit buffer. (SpA ₁ SpB) buffered telex characters via separate transmission paths (WT-Ka.na.1 A, WT-Kanal B) and via each transmission away individually assigned, start-stop-synchronized reception distributor (B VA ₁ E VB) in each one in the receiving station (Fig. 2) arranged reception buffer (EpA ₁ EpB) in series operation that a reception switching device (EUA ₁ EUB) in the Reception buffer (EpA ₁ EpB) transmits cached telex characters to the reception memory (ESL) in parallel operation, and that with η separate transmission paths (WT channel A, WT channel B) the individual transmission distributors (SVA ₁ SVB) by— their work cycle, e.g. B. their rotation, are out of phase with one another. 1 sheet of drawings © 509770/189 4.60