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 81
ut the axis, and ARMATURES. 69 these constitute air passages through the core, thus im-proving ventilation. These discs are mounted directlyon the shaft and arekeyed to prevent turn-ing. They are heldin position by flangesof cast steel or castiron, which are pressedtogether by nuts onthe shaft, as…
Electric machinery
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