Telegraph engineering : a manual for practicing telegraph engineers and engineering students (1922)
Hausmann, Erich, 1886- · New York : D. Van Nostrand Company · leaf 65
TQent of transmitters so designedthat contact is made with one stud an instant before con-tact is broken with the other. The appearance of suchcontinuity-presening transmitters, operated magnetically bymeans of a local circuit, is sho^Ti in Fig. 3. … Fig. 3. The connections of one station of a duplex circuit usingthis transmitter, are shoT\TL in Fig. 4, wherein T is thetransmitter, and j and k are the contact studs, the other DUPLEX TELEGRAPHY 51 letters ha\ing the same significance as before. The trans-mitter has an auxiliary spring lever,…
Telegraph
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