US3449515A - Teleprinter apparatus employing techniques for interrupting message flow during carriage return - Google Patents

Teleprinter apparatus employing techniques for interrupting message flow during carriage return Download PDF

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Publication number
US3449515A
US3449515A US495445A US3449515DA US3449515A US 3449515 A US3449515 A US 3449515A US 495445 A US495445 A US 495445A US 3449515D A US3449515D A US 3449515DA US 3449515 A US3449515 A US 3449515A
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United States
Prior art keywords
carriage return
line
signals
signal
teleprinter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US495445A
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English (en)
Inventor
Fritz Butzke
Sven Voelcker
Bruno Nitschke
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Siemens AG
Siemens Corp
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Siemens Corp
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Publication date
Application filed by Siemens Corp filed Critical Siemens Corp
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Publication of US3449515A publication Critical patent/US3449515A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0264—Arrangements for coupling to transmission lines
    • H04L25/0266—Arrangements for providing Galvanic isolation, e.g. by means of magnetic or capacitive coupling
    • H04L25/0268—Arrangements for providing Galvanic isolation, e.g. by means of magnetic or capacitive coupling with modulation and subsequent demodulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L13/00—Details of the apparatus or circuits covered by groups H04L15/00 or H04L17/00
    • H04L13/18—Details of the apparatus or circuits covered by groups H04L15/00 or H04L17/00 of receivers
    • H04L13/186—Page printing; tabulating

Definitions

  • means are provided to initiate the continuation of the transmission of the information portion of a message, following carriage return and line feed, in each case in dependence upon the completion of the carriage return special function up to the start of the next line.
  • means for blocking the transmission during the carriage return in conjuction with the automatic resumption of the transmission upon completion of the carriage return This can take place, for example, in the form of a deenergization of the releasing magnets for a perforated tape transmitter in connection with the delivery of continuous current over the line.
  • means are provided for the insertion of filler signals following carriage return signals, which are in sufficient number that the duration of the carriage return at least is filled out.
  • These filler signals preferably like wise are carriage return signals.
  • FIG. 1 illustrates a schematic diagram of a teleprinter installation
  • FIG. 2 is a circuit diagram of an additional control device for an electromagnet for the temporary locking of selector members which are scannable a number of times during the locking period;
  • FIG. 3 is a time-path diagram for the arrangement of FIG. 2.
  • FIG. 1 illustrates only one of two teleprinters connected with one another over a line L.
  • This machine contains a keyboard 1 with parallel output for the code signals and a printer 2 with parallel inputs for the code signals.
  • the line L is connected with the teleprinter over a connecting device which contains an electronic converter 30 which includes a series-parallel converter for the conversion of parallel signals into series signals for the transmission of the signals, as well as for the conversion of series signals into parallel signals in the receiving of signals over the line L.
  • the connecting device further contains a signal function evaluator 3b, in which are evaluated those signals that are available which, instead of printing, initiate the execution of certain functions, such as carriage return, line feed, bell and call-back devices, release, horizontal and vertical tabulating, perforator circuits, and possibly other functions.
  • a signal function evaluator 3b in which are evaluated those signals that are available which, instead of printing, initiate the execution of certain functions, such as carriage return, line feed, bell and call-back devices, release, horizontal and vertical tabulating, perforator circuits, and possibly other functions.
  • Such an evaluator replaces the usual mechanical evaluating devices for special function signals in the printer of the teleprinter and enables an especially high flexibility with respect to the number and kind of signals to be evaluated and their representation in the particular code used.
  • message connecting circuits 3a forms a further part of the connecting device.
  • the carriage return signal is there recognized and, as a result thereof, a blocking signal is conducted over a signal line b to the keyboard and there effects a locking action which prevents typing operation and, possibly, provides an optical indication by the lamp 4.
  • the coded signals are extended over the part 3a of the connecting apparatus, along with an additional releasing signal, over line c to the printer 2 and there cause the printing of the control text.
  • the special function signals ascertained in the signal evaluator pass over the line d to the printer 2, in order to there bring about a corresponding electromagnetic release, which is subsequently explained in greater detail.
  • the carriage return signal brings about the return of the type carrier or paper carriage, and the following line feed signal effects the line advance.
  • the code combination carriage return and the parallel-series converter of converter 30, if need be delivers this combination several times to the line.
  • This process is terminated by a completion signal for the carriage return derived from a linebeginning switch 5 of the printer and conducted over a corresponding signal line.
  • a carriage return series signal is terminated and, if need be, another such signal or several is automatically added in order to assure that the printer, possibly driven with fluctuations in rate of revolution of a receiving sheet teleprinter machine, general installed at a remote location, is capable of following the control commands.
  • the Zl-signal always following upon the WR signal or signals sufiices to give adequate time for the possibly uncompleted WR-function.
  • the transmitting apparatus is equipped with a signal storer, for example, a machine in which the transmitting selector members are driven over a continuously running auxiliary drive and, in case of need, are lockable in the displaced position and repeatedly scannable, contrary to the practice in teleprinting machines, according to FIG. 2, in this case, following setting of the selector members on the code combination carriage return by means of the corresponding key, a closeable contact 6 can be inserted in series with the carriage controlled contact 5, which is only open in the line beginning position, and with a controllable electromagnet 7, operative to lock the selector members for carriage return, facilitating the insertion of a succeeding code combination, such as line feed.
  • a signal storer for example, a machine in which the transmitting selector members are driven over a continuously running auxiliary drive and, in case of need, are lockable in the displaced position and repeatedly scannable, contrary to the practice in teleprinting machines, according to FIG. 2, in this case, following setting of the selector members on the code combination carriage return by
  • the code combination carriage return is transmitted several times, in contrast to the normal or usual devices for theoretical prevention of double transmission of set-up impulse combinations.
  • the code combination line feed thus remains stored in the keyboard and is emitted when the signal is given to the keyboard over the signal line e by the printer 2, evaluator 3b and the line b.
  • the lamp 4 in the keyboard is then extinguished and it is possible to resume transmission of the message text.
  • This manner of operation corresponds to that described for the control text in the transmitting operation.
  • the keyboard is locked as long as signals are arriving.
  • Stop through duplex-writing is releasable by a special key independently of the keyboard, which acts on the electronic circuit of the converter 3c.
  • FIG. 3 The time course of the insertion of additional WR signals and of the variable delay of the combination Z1 up to the completion of carriage return is shown in FIG. 3. It is here assumed that the first release of the symbol WR occurs at time to and the keying-in of symbols for Z1 (with interstorage) at time m1. At this time there also begins the locking time TSp of the keyboard. 0n release of any arbitrary signal there also begins at time tal, for example, the stroke hW of the selector comb involved, which makes possible, during the time interval i, the transmission of allocated pulse combinations of normal message signals. After the time z'W of for example 50 ms. (at time m2) the selector comb normally is back in its rest position.
  • an additional perforated tape receiver by the pressing of an allocated key for punched tape reception the code signal input of an automatic tape perforator 8 may be connected over line It with that of the printer. In this manner there can be concurrently punched a message transmitted over the keyboard as well as a message received over the line L. If the distant subscriber transmits a signal punch over over the line, then there automatically takes place the switching on of the perforator 8 over the signal function evaluator 3b. Likewise the switching off of the perforator is controllable from a distance. In all cases, however, on termination of a telegraphic teleconnection the switching off of the per forator should be locally releasable by the usual remote switching device.
  • the electrical connection of the tape perforator 8 with the teleprinter machine also allows a selective use thereof as manual perforator or controlled printer.
  • the keyboard 1 and the perforator 8 are connected with one another and locally operate together, while the printer 2, over the series-parallel converter portion of converter 30, receives the incoming signals from the line L.
  • a switch constructed, for example, as an illuminated key on the message connecting circuits 3a or possibly in the key field and the arrangement of an additional perforated strip reader 9, if desired or necessary, there can also be initiated transmission from a perforated strip.
  • the perforated strip reader 9 there receives a start signal over a signal line 1.
  • the signals are made available to the message connecting circuits 3a on call in the timing of the parallel-series portion of converter 30, over a cable g.
  • the converter 30 transforms the parallel signals into series signals for transmission over the line L. If a control key in the message connecting circuits 3a is actuated, they also pass from the connecting circuits in the form of parallel signals, over the line c to the printer.
  • the arrangement according to FIG. 1 makes it possible without difliculties, with the aid of the electrical coupling of the structural group consisting of a machine with keyboard and printer, a perforated tape reader and a perforator, to carry out other types of operation.
  • the reader may contain a program strip, which establishes the course for the preparation of blank forms, etc., thus assuring correct entries according to columns and lines, and automatic insertion of standard or repetitive texts.
  • printing means operable to print messages upon receipt of message signals
  • said printing means including a carriage movably mounted for movement between a line beginning position and a line ending position and returnable to said beginning position upon receipt of a carriage return signal, means operable to generate message signals and control signals, means for applying said message and control signals to said line and to said printing means, and means connected to said generating means and operable upon receipt of a carriage return control signal to interrupt the operation of said signal applying means for the duration of the return of said carriage to said line beginning position.
  • Apparatus for printing telegraphic signals comprising keyboard transmission means in said generating means, and means for storing at least one signal before transmission wherein the signal following a carriage return signal is storable until completion of the carriage return operation.
  • Apparatus for printing telegraphic signals in accordance with claim 2 comprising selector members and means for locking said selector members in set positions as code combinations and means for repeatedly scanning said members for reproducing the allocated code combinations.
  • Apparatus for printing telegraphic signals in accordance with claim 3 comprising a selector comb, a control member operable to lock said comb in a set position, and
  • first switching means operable by said carriage to release said comb upon completion of the carriage return.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Communication Control (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
US495445A 1964-10-14 1965-10-13 Teleprinter apparatus employing techniques for interrupting message flow during carriage return Expired - Lifetime US3449515A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DES93726A DE1227052B (de) 1964-10-14 1964-10-14 Fernschreibanlage mit mindestens einer Blattfernschreibmaschine mit in Abhaengigkeit von einem Wagenruecklaufbefehl selbsttaetig an den Zeilenanfang rueckholbarem wagen
DES0098628 1965-08-04

Publications (1)

Publication Number Publication Date
US3449515A true US3449515A (en) 1969-06-10

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ID=25997858

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US495445A Expired - Lifetime US3449515A (en) 1964-10-14 1965-10-13 Teleprinter apparatus employing techniques for interrupting message flow during carriage return
US505315A Expired - Lifetime US3448206A (en) 1964-10-14 1965-10-23 Teletypewriter system with at least one sheet teletypewriter machine

Family Applications After (1)

Application Number Title Priority Date Filing Date
US505315A Expired - Lifetime US3448206A (en) 1964-10-14 1965-10-23 Teletypewriter system with at least one sheet teletypewriter machine

Country Status (5)

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US (2) US3449515A (da)
DE (2) DE1227052B (da)
DK (1) DK129959B (da)
FR (1) FR1450123A (da)
GB (1) GB1092490A (da)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5159236A (en) * 1974-11-20 1976-05-24 Sanyo Electric Co Purintano busy shingohatsuseihoshiki
US4004088A (en) * 1974-08-22 1977-01-18 Siemens Aktiengesellschaft System for the formulation and transmission of coordinate information to reproduce handwritten items

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO122532B (da) * 1970-01-16 1971-07-12 Standard Tel Kabelfab As

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2189541A (en) * 1938-03-26 1940-02-06 Teletype Corp Printing telegraph apparatus
US2669602A (en) * 1951-09-27 1954-02-16 Creed & Co Ltd Printing telegraph apparatus
US2907823A (en) * 1956-01-25 1959-10-06 Siemens Ag Start-stop teleprinter
US2912485A (en) * 1957-04-05 1959-11-10 Bell Telephone Labor Inc Automatic teletypewriter station control system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2189541A (en) * 1938-03-26 1940-02-06 Teletype Corp Printing telegraph apparatus
US2669602A (en) * 1951-09-27 1954-02-16 Creed & Co Ltd Printing telegraph apparatus
US2907823A (en) * 1956-01-25 1959-10-06 Siemens Ag Start-stop teleprinter
US2912485A (en) * 1957-04-05 1959-11-10 Bell Telephone Labor Inc Automatic teletypewriter station control system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4004088A (en) * 1974-08-22 1977-01-18 Siemens Aktiengesellschaft System for the formulation and transmission of coordinate information to reproduce handwritten items
JPS5159236A (en) * 1974-11-20 1976-05-24 Sanyo Electric Co Purintano busy shingohatsuseihoshiki

Also Published As

Publication number Publication date
US3448206A (en) 1969-06-03
DK129959C (da) 1975-05-12
DK129959B (da) 1974-12-02
DE1227052B (de) 1966-10-20
FR1450123A (fr) 1966-05-06
DE1252231B (de) 1967-10-19
GB1092490A (en) 1967-11-22

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