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 1192
keeping the wires from slipping. If of metal, they mustbe insulated from the punchings for the same reason as wasexplained with the use of bolts. In some cases the slots are made partially closed asshown. This makes it a little more difficult to insert thewires, but they are then held securely in… … Fig. 511 In slotted armatures, especially if the slots are deep,when the punchings are forced together, that part of thepunchings which projects beyond the ring E, Fig. 505, islikely to bulge out. In order to prevent this a few piecesof extra heavy metal are obtained and used at the ends.One…
