Specifications for the multiplex printing telegraph system : theory and operation (1920)
Western Union Telegraph Company · [New York?] : The Company · leaf 18
ML= LINE WIRE=I550 (6)—- NO CURRENT 80 V. GENERATOR … 60V.GENERATOR Fig. 5 from both stations; that is, both the home and distant keys depressed. This is illus-trated in Figure 5. As the voltages of the two generators are equal and of the samepolarity, and as the resistances in the circuit are equal at both ends, the tendencies ofthe currents to flow…
Telegraph
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