Dynamo electric machinery; its design, construction, and operation; direct-current machines (1915)
Sheldon, Samuel, 1862-1920, Hausmann, Erich, 1886- joint author · New York, D. Van Nostrand Company; · leaf 84
Fig. 39. Two types of armature slots are in general use, theopen slot and the partly closed slot. The former has theadvantage that the armature conductors may be formedinto coils, insulated, and readily inserted into the slots, … Fig. 40. whereas the latter type simplifies the matter of securingthe windings into place. The open slot is more oftenemployed on direct-current machines. Fig. 40 shows someof the styles of open and partially closed slots; the re- ARMATURES. 73 cesses at the top of some teeth being provided for…
Electric machinery
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