Electrical engineer's pocket-book: a hand-book of useful data for electricians and electrical engineers (1901)
Foster, Horatio A. (Horatio Alvah), 1858-1913 · New York, D. Van Nostrand co.; London, E.& F.N. Spon, ltd. · leaf 675
Multiplex Telephony. 8IMrLTA]¥EOlJ§ TELEGRAPHY AID TEL- A system of simultaneous telephony and telegraphy is extensively em-ployed in the United States, and is an improvement uponthe system inventedby Van Rysselberghe of Belgium, the system being often culled by his name.Tbe figure, taken from… … Fig 33. It consists of a combination of telephone and telegraph apparatus withcondensers and retardation or impedance coils so arranged that the Morsesignals do not react upon the telephone apparatus and the telephone cur-rents do not react upon the telegraph apparatus. The letters attached tothe…
Electrical engineering
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