American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 385
\ 328 AMERICAN TELEGRAPHY. … inmm bar CB is jDressed by the block b against the contact tongues, the said coils are placedin multiple. Similarly, the coils bc, 3, c\ d\ etc., are placed in multiple when thecontact bar cb is pressed against them. This will, perhaps, be more evident by reference to Fig. 250, in which one set…
Telegraph
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
