American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 227
, on the otherhand, the dista7it terminal of each is at zero, under w^hich conditions, of course, acurrent will flow in these wires. If now the pole-changer p cat y, be closed, it will place a negative pole t(»the line. That action should reverse the magnetism in p r but should have no effect on… … THE POLAR DUPLEX. 189 With the positive pole to the line at x and the negative to the line at y therewill be twice the current flowing over the line Avire that flows through the artificiallines. Before the reversal of p c the current was flowing only through the artificialline coil ofpR, shown by…
Telegraph
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