Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise .. (1916)
Swingle, Calvin F. (Calvin Franklin), b. 1846 · Chicago, F.J. Drake & company · leaf 1190
e of a motor, theforce applied is almost as severe as the blow of a hammer. MECHANICAL CONSTRUCTION OF THE ARMATURE. All good armatures are made up of a number of punch-ings similar to those shown in Figs. 507-508-509. Thesepunchings are made of soft iron or steel. The figuresillustrate the… … Fig. 507 Fig. 508 Fig. 509 between them to reduce the Foucault, or eddy, currents.This insulation is obtained by inserting layers of thin paperbetween the sheets of metal, or by coating the punchingsthemselves. Paper, and similar materials used for thispurpose will in time char from the heat of the…
