American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 75
ery con-sisting of from 10 to 150 cells or more, according to the length of the circuit. A regular Morse circuit with battery, keys, relays and sounders, at two terminalstations, is shown in Fig. 34. r, e, are the relays, each of which is furnished witha bar s of soft iron, termed the core. This… … THEORETICAL MORSE CIRCUIT. The poles of the core are at the ends next to a in figure, a small strip of soft iron, termed the armature of the relay, placed close to the ends of the core of the re-lay. This armature a is supported in its position by the upright rod, or lever, r, towhich it is rigidly…
Telegraph
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