| 310 / | HD | ELECTRICAL GENERATOR OR MOTOR STRUCTURE |
| 10 | DF | DYNAMOELECTRIC {5} |
| 40 R | DF | .~ Rotary {28} |
| 179 | DF | .~.~ Windings and core structure {7} |
| 195 | DF | .~.~.~ Armature or primary {9} |
| 198 | DF | .~.~.~.~ Plural windings {1} |
| 199 | | .~.~.~.~.~ Combined stationary and rotary |