Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise on the care and management of steam engines, boilers and electric machinery (1922)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 1191
hrunk upon the shaft. 1156 Steam Engineering or with large nuts screwed on the shaft. Bolts extendingthrough the punchings are often used. These bolts mustbe insulated from the punchings; otherwise there will bea flow of current through the shaft, the body of the arma-ture and the bolts. It is well… … Fig. 510 currents to a minimum, no electrical paths should be pro-vided through the armature core. Where an armature is slotted as indicated in Pig. 505,some of the punchings are often made of smaller diameterthan the rest, or are afterward turned down as indicated inthe figure. This is to allow…
