Telegraph engineering : a manual for practicing telegraph engineers and engineering students (1922)
Hausmann, Erich, 1886- · New York : D. Van Nostrand Company · leaf 260
PLAN VIEW-COVER REMOVED. … SECTIONAL SIDE VIEVC. Fig. 16. be from 0.0004 to 0.0015 ohm. The propulsion current, inbeing carried around the insulating joints which separatethe track signal circuits from each other, flows differentiallythrough the bonds and, consequently, does not magnetizetheir cores. Therefore, the…
Telegraph
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