| 1/00 | Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general (machine elements in general F16; coupling of knobs to shafts F16D) |
| 1/02 | Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general (machine elements in general F16; coupling of knobs to shafts F16D) Indicating arrangements |
| 1/04 | Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general (machine elements in general F16; coupling of knobs to shafts F16D) Indicating arrangements with optical indicating means |
| 1/06 | Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general (machine elements in general F16; coupling of knobs to shafts F16D) Driving or adjusting arrangements; combined with other driving or adjusting arrangements, e.g. of gain control |
| 1/08 | Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general (machine elements in general F16; coupling of knobs to shafts F16D) Driving or adjusting arrangements; combined with other driving or adjusting arrangements, e.g. of gain control Toothed-gear drive; Worm drive |
| 1/10 | Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general (machine elements in general F16; coupling of knobs to shafts F16D) Driving or adjusting arrangements; combined with other driving or adjusting arrangements, e.g. of gain control Rope drive; Chain drive |
| 1/12 | Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general (machine elements in general F16; coupling of knobs to shafts F16D) Driving or adjusting arrangements; combined with other driving or adjusting arrangements, e.g. of gain control Friction drive |
| 1/14 | Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general (machine elements in general F16; coupling of knobs to shafts F16D) Driving or adjusting arrangements; combined with other driving or adjusting arrangements, e.g. of gain control Special arrangements for fine and coarse tuning |
| 1/16 | Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general (machine elements in general F16; coupling of knobs to shafts F16D) Driving or adjusting arrangements; combined with other driving or adjusting arrangements, e.g. of gain control Single control means independently performing two or more functions |
| 1/18 | Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general (machine elements in general F16; coupling of knobs to shafts F16D) Control by auxiliary power |
| 1/20 | Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general (machine elements in general F16; coupling of knobs to shafts F16D) Control by auxiliary power the auxiliary power being switched on as long as controlling current is switched on |
| 1/22 | Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general (machine elements in general F16; coupling of knobs to shafts F16D) Control by auxiliary power with stepping arrangements actuated by control pulses |
| 3/00 | Continuous tuning (H03J 7/00, H03J 9/00 take precedence; combination of continuous and discontinuous tuning other than for bandspreading H03J 5/00) |
| 3/02 | Continuous tuning (H03J 7/00, H03J 9/00 take precedence; combination of continuous and discontinuous tuning other than for bandspreading H03J 5/00) Details |
| 3/04 | Continuous tuning (H03J 7/00, H03J 9/00 take precedence; combination of continuous and discontinuous tuning other than for bandspreading H03J 5/00) Details Arrangements for compensating for variations of physical values, e.g. temperature (automatic control of ambient conditions G05D) |
| 3/06 | Continuous tuning (H03J 7/00, H03J 9/00 take precedence; combination of continuous and discontinuous tuning other than for bandspreading H03J 5/00) Details Arrangements for obtaining constant bandwidth or gain throughout tuning range or ranges (automatic gain control H03G) |
| 3/08 | Continuous tuning (H03J 7/00, H03J 9/00 take precedence; combination of continuous and discontinuous tuning other than for bandspreading H03J 5/00) Details Arrangements for obtaining constant bandwidth or gain throughout tuning range or ranges (automatic gain control H03G) by varying a second parameter simultaneously with the tuning, e.g. coupling bandpass filter |
| 3/10 | Continuous tuning (H03J 7/00, H03J 9/00 take precedence; combination of continuous and discontinuous tuning other than for bandspreading H03J 5/00) Details Circuit arrangements for fine tuning, e.g. bandspreading |
| 3/12 | Continuous tuning (H03J 7/00, H03J 9/00 take precedence; combination of continuous and discontinuous tuning other than for bandspreading H03J 5/00) Details Electrically-operated arrangements for indicating correct tuning |
| 3/14 | Continuous tuning (H03J 7/00, H03J 9/00 take precedence; combination of continuous and discontinuous tuning other than for bandspreading H03J 5/00) Details Electrically-operated arrangements for indicating correct tuning Visual indication, e.g. magic eye |