, arranged and case It will be seen that this machine differs from that of Colson, of Brentwood, N. Y. The object of this invention adapted to be moved in a magnetic field consisting of a series is to utilize to the best advantage the heat of poles of alternately opposite polarity developed by the… … nia boiler, these two boilers being connect- the junctions between two contiguous ed by top and bottom tubes. coils. These commutator plates are usu- Fig. l.-BIPOLAR DYNAMO-ELECTRIC MACHINE Mr. Fredrick E. McKinley, of Welling- ally disposed spirally about the axis of the ton, Kan., has patented an…
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