American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 234
homebattery. This will be alluded to in detail later. Theoky of the Quadkuplex.—There are several ways in which the forgoing men-tioned combination of the principles of the Stearns duplex and the polar duplex maybe effected on one wire. One of these is shown, theoretically, in Fig. 160. PC is… … The result of introducing the resistance into the circuit is that the current strengthis decreased. When the transmitter is open and the strength of current is thus de-creased, the spring of the relay, nr, is so adjusted that its armature is withdrawn fi-omthe front stop, but when the resistance,…
Telegraph
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