US PATENT SUBCLASS 290 / 20
.~.~.~.~.~ Rotary field and armature

Current as of: June, 1999
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290 /   HD   PRIME-MOVER DYNAMO PLANTS

7  DF  ELECTRIC CONTROL {10}
*  DD  .~ Traction {5}
9  DF  .~.~ Electric traction motor {3}
18  DF  .~.~.~ As starter {2}
19  DF  .~.~.~.~ As generator {1}
20.~.~.~.~.~ Rotary field and armature

DEFINITION

Classification: 290/20

Electric-control prime-mover dynamo plants including a dynamo electric machine which acts as a traction-motor, as a motor for starting the prime mover, and as an electric generator, the field and armature of said machine being both rotatable.