American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 259
hecrescent-shaped and numbered discs, on the base-board b are connected by insulatedwires to correspondingly numbered discs, on the ends of the condensers, as shown,which latter, as previously intimated,miiy be in a separate room. The strips s s on B,are connected to the artificial line through the… … SMITH ARRAXGEMEXT OF CONDENSERS TO ECONOMIZE SPACE DYNAMO KEY SYSTEMS. 717 Dynamo-Ouadruplex Key Systems. Owing to the difficulty that presented itself in the attempt to operate any sys-tem of telegraphy, requiring reversals of polarity, from dynamo machines which werealso required to furnish,at…
Telegraph
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