| 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 |