| 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 | DF | .~.~ Plural {3} |
| 130 | ![]() | .~.~.~ Ganged {3} |
| 131 | DF | .~.~.~.~> Resistors individually adjustable |
| 132 | DF | .~.~.~.~> Resistors in tandem along rotary shaft or coupling |
| 133 | DF | .~.~.~.~> Rectilinearly operated |