American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 231
c, and l correspond to andperform similar functions to those of similar parts of Fig. 157. TERMINAL CONNECTIONS AND APPAEATUS OF POLAR DUPLEX WITH DYNAMOS AS SOURCE OF ELECTROMOTIVE FORCE. Fig. 159 shows connections of duplex with dynamos as generators of electro-motive force. A special form of… … B. AND O. POLE-CHANGER. the lever l, pivoted on trunnion bearings at x. p, p, are brass standards connected,respectively, to the positive and negative dynamo machines. The line wire is con-nected to the lever. The lever rests on p when closed, and on p when it is open.Between its opening and…
Telegraph
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