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High-Speed Teleprinter System

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2 Author(s)
W. Kaiser ; Standard Elektrik Lorenz AG, Stutgart, Germany ; W. Schiebeler

A novel printing method is used in a high-speed, fully electronic teleprinter system which is able to transmit, receive, and print-out telegraph and data messages at a maximum speed of 225 characters per second or 1800 bauds, i.e., 20 to 30 times faster than in ordinary teleprinters in use today. The system consists of 1) a photoelectric reader for punched tape and an electronic transmitter, 2) an electronic receiver and high-speed printer, and 3) the necessary equipment to transmit and receive the signals on telephone channels. Main emphasis in this paper is given to the nonpercussive printer, which generates the characters by electrolytical inking of ordinary, untreated teleprinter paper in a 5 by 7 mosaic form. The printing shows good contrast, is fast to wiping, light, and the influence of ordinary chemical fluids, and may be copied by all known office reproduction sets. The system may be used with advantage when: 1) large amounts of information have to be transmitted and printed out, 2) the communication channel is available only for limited time, e.g., in radio satellite communication, and 3) the transmission has to be finished in a short time. The system has been tested with good success on radio satellite communication loops.

Published in:

IEEE Transactions on Communication Technology  (Volume:13 ,  Issue: 3 )