A dictionary of electrical words, terms and phrases (1896)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W.J. Johnston company · leaf 524
r and breaker.These impulses are sent into the line by the de-pression of keys on a suitably arranged key-board. When the proper letter or jrxsf.eral is reachedat the receiving end, the printing wheel isstopped, and a paper fillet is pressed against itssurface. The printing wheel is kept… … Fig. S32- Callahans Printing Telegraph. ■A system Telegraphy, Quadruplex — for the simultaneous transmission of four mes-sages over a single wire, two in one directionand the remaining two in the opposite direc-tion. Quadruplex telegraphy consists in fact of du-plex telegraphy duplexed. There are…
Electricity · Electrical engineering
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