315 / | HD | ELECTRIC LAMP AND DISCHARGE DEVICES: SYSTEMS |
246 | DF | PULSATING OR A.C. SUPPLY {10} |
268 | DF | .~ Discharge control discharge device load {5} |
272 | DF | .~.~ Rectifier and/or discharge device in the control circuit {1} |
273 | .~.~.~ With condenser in the control circuit |