| 314 / | HD | ELECTRIC LAMP AND DISCHARGE DEVICES: CONSUMABLE ELECTRODES |
| 51 | DF | PLURAL MOVABLE ELECTRODES {1} |
| 52 | DF | .~ Plural electrode feeding {1} |
| 53 | ![]() | .~.~ Interconnected operator {3} |
| 54 | DF | .~.~.~> With separate movement of one electrode |
| 55 | DF | .~.~.~> With diverse rates of feed |
| 56 | DF | .~.~.~> Gear-, belt-, or chain-connected |