| 1/00 | Details of apparatus for conversion |
| 1/02 | Details of apparatus for conversion Circuits specially adapted for the generation of grid-control or igniter-control voltages for discharge tubes incorporated in static converters |
| 1/04 | Details of apparatus for conversion Circuits specially adapted for the generation of grid-control or igniter-control voltages for discharge tubes incorporated in static converters for tubes with grid control |
| 1/06 | Details of apparatus for conversion Circuits specially adapted for rendering non-conductive gas discharge tubes or equivalent semiconductor devices, e.g. thyratrons, thyristors |
| 1/08 | Details of apparatus for conversion Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters |
| 1/084 | Details of apparatus for conversion Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters using a control circuit common to several phases of a multi-phase system |
| 1/088 | Details of apparatus for conversion Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices |
| 1/092 | Details of apparatus for conversion Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices the control signals being transmitted optically |
| 1/096 | Details of apparatus for conversion Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices the power supply of the control circuit being connected in parallel to the main switching element (H02M 1/092 takes precedence) |
| 1/10 | Details of apparatus for conversion Arrangements incorporating converting means for enabling loads to be operated at will from different kinds of power supplies, e.g. from ac or dc |
| 1/12 | Details of apparatus for conversion Arrangements for reducing harmonics from ac input or output |
| 1/14 | Details of apparatus for conversion Arrangements for reducing ripples from dc input or output |
| 1/15 | Details of apparatus for conversion Arrangements for reducing ripples from dc input or output using active elements |
| 1/16 | Details of apparatus for conversion Means for providing current step on switching, e.g. with saturable reactor |
| 1/20 | Details of apparatus for conversion Contact mechanisms of dynamic converters |
| 1/22 | Details of apparatus for conversion Contact mechanisms of dynamic converters incorporating collectors and brushes |
| 1/24 | Details of apparatus for conversion Contact mechanisms of dynamic converters incorporating rolling or tumbling contacts |
| 1/26 | Details of apparatus for conversion Contact mechanisms of dynamic converters incorporating cam-operated contacts |
| 1/28 | Details of apparatus for conversion Contact mechanisms of dynamic converters incorporating electromagnetically-operated vibrating contacts |
| 1/30 | Details of apparatus for conversion Contact mechanisms of dynamic converters incorporating liquid contacts |