Hallberg, Josef Henrik, 1874- · New York city, The Moving picture world · leaf 51
ect connection to an engine 44 MOTION PICTURE ELECTRICITY or other source of power, the shaft and the magnet polesare rotated at high speed acting magnetically upon thestationary soft iron cores, transmitting alternately northand south pole magnetism to the cores, thereby inducinga current to flow… … / ROTATINGMAGNET POLES COPPER WIRE COILS ON CORES PULLEY MAGNET FRAME GENERATOR BASE Fig. 13 If the generator illustrated in Fig. 13 operates at thespeed of 1,800 revolutions per minute, we find from therule that we should multiply the speed by the number ofrotating pole pieces, which in this case…
Motion picture theaters · Electric lighting
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