American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 63
th^ dynamomachines employed in developing electricity for the wires emanating from theWestern Union building, New York. It differs in several respects from the arrange-ment just described. In the former there are but four grades of potential, although,five machines are employed. In this arrangement… … chines of each series, Fig. 26, supply 70 volts each; the 3d and 4th machines 60 voltseach, and the 5th machine 65 volts; amounthig in all to 325 volts for each series.Each machine is tapped at x^ x, etc. as in the diagram, and a portion of the current 1?diverted to the artificial resistances,…
Telegraph
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