Specifications for the multiplex printing telegraph system : theory and operation (1920)
Western Union Telegraph Company · [New York?] : The Company · leaf 61
but in practice the one-channel circuit is really a two-channel set where one channelis left idle so the one channel set uses the same number of segments as the two-channelset. In mechanical construction the two and single channel head is exactly like the fourchannel head but electrically it has… … C - PTR. LAMP SEGMENTSTO TERMINAL POST C LOCAL RECEIVING \-ZO TO PLUGPINS [-20. SEGMENTS CORRECTING SENDING\-ZO TO PLUG IB-19B TO PLUG PIN Kt9. PINS I-ZO- la -19a TO PLUG PIN S 19 . Fig. 19 1 TO PLUG PIN 4 a •> » •> s 3 » •> » e A » » 3 s » >< ii 7 s •> II ii S 7 » J M 10 6 » It…
Telegraph
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