US2991330A - Teleprinter reception system for multichannel operation - Google Patents

Teleprinter reception system for multichannel operation Download PDF

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Publication number
US2991330A
US2991330A US724334A US72433458A US2991330A US 2991330 A US2991330 A US 2991330A US 724334 A US724334 A US 724334A US 72433458 A US72433458 A US 72433458A US 2991330 A US2991330 A US 2991330A
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United States
Prior art keywords
relays
teleprinter
impulses
holding
receiver
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Expired - Lifetime
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US724334A
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English (en)
Inventor
Weber Karel
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Tesla AS
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Tesla AS
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Publication date
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes

Definitions

  • the receiver may be of normal design except for the fact that the device for receiving successively the individual impulses, comprising usually an electromagnet the armature of which controls a known mechanism with a so called sword lever or a similar mechanism, is arranged separately for each of the five transmission paths so that the receiver reads the whole impulse code simultaneously either by printing on paper or by perforating a ta e.
  • the said separate paths for transmitting the significant code impulses consist either of separate wire lines, or channels transmitted over a single line or a wireless transmission path.
  • This present invention relates to a reception system for such multichannel operation over wire lines or Wireless paths.
  • the invention simplifies considerably the receiving mechanism of such systems.
  • the individual paths or channels for the individual significant code combination impulses which are transmitted together are connected to an equal number of individual polarisation relays.
  • Those of the polarisation relays which receive current impulses close first holding circuits of respectively coordinated combination relays whose second holding circuits are closed by means of a contact controlled by a cam system which is set into rotation by connection with a continually rotating shaft, this connection being efiected by an electromagnet excited in response to the start impulse, the said cam system controlling also for a short time, for example 1.7 msec., a change-over contact connected in the said second holding circuits, so that if these circuits are broken when the said contact is changed over, those of the combination relays whose first holding circuits are not also closed, are released, whereby the received impulse combination is registered.
  • This registration is then transmitted through a contact system to a printing or perforation device which is set into action by means of a contact which is also actuated by the said cam system.
  • FIG. 1 illustrates the more important parts of the circuit diagram of the receiving device according to the invention.
  • FIG. 2 shows the shape of the impulse at various significant points of the device.
  • FIG. 3 shows the cam system of the invention in perspective view.
  • the remote teleprinter transmitter is in the rest position when a stop impulse arrives, the armature of the polarised telegraph relay Str at the receiving end is in the position shown in FIG. 1 and current flows through the electromagnet SM.
  • this magnet is actuated, the cam system of the receiver shown in FIG. 3 is blocked and cannot be rotated by the frictional felt coupling 10.
  • a Worm gear 12 meshing with a worm 13 mounted on a permanently rotating shaft 14 starts rotation of the cams 15, 16, and 17 of the receiver respectively controlling a read-out switch As, a master energizing switch An, and a master holding switch PK which has two closed positions and is momentarily opened during movement between the two closed positions.
  • the master energizing switch An actuates five combination relays KR1 to-KR5 which have respective contacts in the following first holding circuits:
  • the relays KR the second holding circuits of which are not closed by the contacts pr are released due to the short current interruption.
  • the other relays KR are not released because the second holding circuit is arranged in parallel with the first holding circuit. In this manner the receiver registers the entire code combination.
  • the cam 15 then closes the read-out switch AS and controls the relevant printing device.
  • the set contacts kr to kr of the relays KR transmit the signal for printing.
  • the receiver Due to the fact that the relays KR are released within a very short time /below 0.5 msec./, the receiver can perfectly write the received impulses in spite of their considerable distortion.
  • a receiver arrangement for a multi-channel teleprinter controlled by a plurality of impulses simultaneously transmitted over respective transmission channels the combination of a plurality of polarization relays each associated with a respective one of the transmission channels and being controlled by impulses arriving at the receiver over said respective transmission channel, a plurality of storage relays each associated with a respective one of said polarization relays, an energizing circuit for each of said storage relays, a master energizing switch simultaneously controlling the energizing circuits of all of said storage relays, a first holding circuit for each of said storage relays, a master holding switch interposed in said first holding circuit of each of said storage relays and adapted tosimultaneously interrupt all of the first holding circuits upon momentary opening of said master holding switch, each of said polarization relays having an individual holding contact which is closed upon reception of an impulse by the respective polarization relay, a second holding circuit for each of said storage relays having said individual holding contact of the respective polarization relay interposed therein so

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Facsimiles In General (AREA)
US724334A 1957-04-05 1958-03-27 Teleprinter reception system for multichannel operation Expired - Lifetime US2991330A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS360094X 1957-04-05

Publications (1)

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US2991330A true US2991330A (en) 1961-07-04

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US724334A Expired - Lifetime US2991330A (en) 1957-04-05 1958-03-27 Teleprinter reception system for multichannel operation

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US (1) US2991330A (en))
BE (1) BE566523A (en))
CH (1) CH360094A (en))
FR (1) FR1194252A (en))
GB (1) GB857006A (en))

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3288919A (en) * 1962-12-10 1966-11-29 Bell Telephone Labor Inc Data transmission system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2134005A (en) * 1929-09-19 1938-10-25 Teletype Corp Selective control system and apparatus
US2173154A (en) * 1934-11-08 1939-09-19 Csf Telecontrol system
US2282358A (en) * 1939-12-07 1942-05-12 Western Union Telegraph Co Telegraph system
US2504997A (en) * 1940-07-26 1950-04-25 Creed & Co Ltd Receiver for start-stop printing telegraph signals

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2134005A (en) * 1929-09-19 1938-10-25 Teletype Corp Selective control system and apparatus
US2173154A (en) * 1934-11-08 1939-09-19 Csf Telecontrol system
US2282358A (en) * 1939-12-07 1942-05-12 Western Union Telegraph Co Telegraph system
US2504997A (en) * 1940-07-26 1950-04-25 Creed & Co Ltd Receiver for start-stop printing telegraph signals

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3288919A (en) * 1962-12-10 1966-11-29 Bell Telephone Labor Inc Data transmission system

Also Published As

Publication number Publication date
FR1194252A (en)) 1959-11-09
CH360094A (de) 1962-02-15
GB857006A (en) 1960-12-21
BE566523A (en))

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