Signaling system

Telegraphy – Systems – Printing

Patent

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Details

179 15S, 178 2204, H04K 106

Patent

active

043439705

ABSTRACT:
1. In electrical signaling in which the signal varies in amplitude from instant to instant, and at any one instant has an amplitude equal to one of a limited number of values having a total range in excess of two, means to disguise the signal preparatory to transmission comprising means in each instant to establish for transmission under control of said signal a voltage having with substantially equal probability any one of a like limited number of amplitude values having a total range in excess of two, means to transmit said established voltages, and means at a receiving point to retranslate the transmitted voltages into the clear signal.

REFERENCES:
patent: 487229 (1892-11-01), Neal
patent: 1613686 (1927-01-01), Vernam
patent: 1953918 (1934-04-01), Bellamy
patent: 2098956 (1937-11-01), Dudley
patent: 2139676 (1938-12-01), Friedman
patent: 2272070 (1942-02-01), Reeves
patent: 2401888 (1946-06-01), Smith
patent: 2414101 (1947-01-01), Hogan et al.
patent: 2517587 (1950-08-01), Mohr
patent: 2547514 (1951-04-01), Zenner
patent: 2913525 (1959-11-01), Larsen

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