Williams, Henry Smith, 1863-, Williams, Edward Huntington, 1868-1944, joint author · New York and London, The Goodhue company · leaf 236
face each other, the lines of magnetic force passingbetween these poles are concentrated into a narrowcompass. With the ordinary bar magnet, as everyoneis aware, these lines of force circle out in everj^ directionfrom the poles in an almost infinite number of loops, allconverging at the poles, and… … THE EVOLUTION OF THE DYNAMO. Fig. I.—A small example of the original commercial form of the drum armature ma-chine, patented in 1873 by Dr. Werner Siemens and F. Von Hefner Alteneck. The armatureis a development of the Siemens shuttle form of 1856, and gives a nearly continuous current.Fig. 2.—Arr…
Industrial arts · Machinery
Internet Archive Book Images · No known copyright restrictions (public domain). Free to use for anything.
