American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 219
e line to ground when a balance is desired by thedistant end,but it is not so essential in the Stearns duplex as it is in the polar duplex,inasmuch as if the transmitter be open the line is tliereby grounded. i8o AMERICAN TELEGRAPHY. Stearns tkansmittek.—In Fig. 146 the Stearns transmitter is shown… … STEARNS TRANSMITTER. Balancing stearns duplex.—In taking a balance on this form of duplex it isonly necessary to ask the distant station to open his key. This opens his transmitterwhich places the distant end to ground. Dots and dashes are then made on theliome key and the rheostat and condenser…
Telegraph
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