American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 488
tal segments on pc is such that tliemiddle brush rests on a segment jointly with each of its neighboring brushes, alter-nately. The result is that rapid reversals of polaritj^ are transmitted througli tliepolarized relays so long as the pole changer continues to revolve ; the consequence ofwhich… … J H- 4H AMERICAN TELEGRAPHY. FIG. 30912. .^ of all of the j^olarized relays TR, TRetc, are conaected, respectively, to dynamo machmesof different polarity, as shown, for instance, in the case of the enlarged relay TR,whose contact points are in connection with dynarao machines d, d,…
Telegraph
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