Keybars for affixing stator core laminations to annular web plates of a stator frame include a cylindrical portion and a dovetail portion. The cylindrical portion is closely fitted within accurately bored axially aligned circular holes in the annular web plates. During preliminary assembly, the cylindrical...http://www.google.ca/patents/US4564779?utm_source=gb-gplus-sharePatent US4564779 - Dynamoelectric machine stator using cylindrical keybars
