International Library of Technology · Scranton, International Textbook Co. · leaf 96
re disks may be either plain or slotted.The disk is punched out of the sheet, and a hole for theshaft, or the spider, is usually made by a second operation,a keyway being also cut out at the same time. When aslotted armature is required, the disk is then placed under apunching-press with a… … Fig. 1366. to contain the conductors is at {d). Form (c) is a simplemodification of (a), and is used for small ring-wound arma-tures. Form (d) is a compromise between (a) and (b). Theconductors are held securely by means of a hardwood strip,which is driven in above them and is held by the…
Electrical engineering
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