American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 229
to cut in, which he does by turning the switch to theright. When he has done so ask him to close his key so that the armature of thehome relay will rest against its contact point. The armature may then be given aslight bias away from its contact point and the home pole-changer again operated.If… … -I Polarized Rela^
Telegraph
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer03inte-354-223.webp)
