Telegraph engineering : a manual for practicing telegraph engineers and engineering students (1922)
Hausmann, Erich, 1886- · New York : D. Van Nostrand Company · leaf 53
Fig. 20. enable an operator to sever the two circuits, leaving eachcomplete in itself for simplex operation. Fig. 21 shows theWeiny-Phillips transmitter. … Fig. 21. Normally, when both the eastern and western circuitsare closed at the distant stations, current flows through allmagnet windings of the repeater set. Thus, normally, SIMPLEX TELEGRAPHY 39 current flows from the western station through the main-line coils of relay R, circuit-closing switch…
Telegraph
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
