American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 291
Ea^^ ItejoeaZi/7^ Sozz/ider^ … -l|l|l|^|l|l SingleTransrTzilter W&sf Mu^al\^elajr -XO. 2 SIDE OF QUAD. REPEATING INTO QUAD. TRANSMITTER OF ANOTHER SET. repeating station. The duplex connections are omitted for the sake of simplicity.Polar relay pk by means of its armature lever has control of the local circuit of…
Telegraph
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