Twentieth century hand-book for steam engineers and electricians with questions and answers; a practical non-technical treatise .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 1184
of a motor, theforce applied is almost as severe as the blov^ 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 w411 in time char from the heat of the…
