| 338 / | HD | ELECTRICAL RESISTORS |
| 68 | DF | MECHANICALLY VARIABLE (E.G., RHEOSTAT) {24} |
| 118 | DF | .~ Movable contact electrically adjustable over length of resistance element {21} |
| 128 | ![]() | .~.~ Plural {3} |
| 129 | DF | .~.~.~> Sequentially operated |
| 130 | DF | .~.~.~> Ganged {3} |
| 134 | DF | .~.~.~> Individually operated concentric shaft type |