US PATENT SUBCLASS 318 / 773
.~.~.~ Pole changing

Current as of: June, 1999
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318 /   HD   ELECTRICITY: MOTIVE POWER SYSTEMS

727  DF  INDUCTION MOTOR SYSTEMS {12}
767  DF  .~ Primary circuit control {9}
772  DF  .~.~ Plural speed {1}
773.~.~.~ Pole changing {2}
774  DF  .~.~.~.~> Single phase motor {2}
777  DF  .~.~.~.~> Separate primary running winding for each pole number, alternately energized

DEFINITION

Classification: 318/773

Pole changing:

(under subclass 772) Subject matter wherein the means connected to the windings provides a predetermined number of primary magnetic poles at one operating speed and a different number of poles for another operating speed.