310 / | HD | ELECTRICAL GENERATOR OR MOTOR STRUCTURE |
10 | DF | DYNAMOELECTRIC {5} |
40 R | DF | .~ Rotary {28} |
114 | DF | .~.~ Plural rotary elements {3} |
115 | DF | .~.~.~ Field and armature both rotate {2} |
118 | DF | .~.~.~.~ With interconnecting drive mechanism {3} |
120 | .~.~.~.~.~ Friction-drive mechanism |