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Class Numbers & Titles | Class Numbers Only | USPC Index | International | HELP |
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Class 323 | ELECTRICITY: POWER SUPPLY OR REGULATION SYSTEMS |
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201 | INCLUDING A DYNAMOELECTRIC MACHINE |
205 | FOR REACTIVE POWER CONTROL |
212 | FOR PHASE SHIFT OR CONTROL |
213 | By splitting and combining |
214 | Using saturable inductor |
215 | Using transformer |
217 | Using a three or more terminal semiconductive device |
218 | Using impedance |
220 | IN SHUNT WITH SOURCE OR LOAD |
221 | Photo responsive |
222 | Using choke and switch across source |
223 | Using a three or more terminal semiconductive device |
227 | Using electronic tube |
229 | Using diode |
232 | Using inductor |
233 | Using impedance |
234 | OUTPUT LEVEL RESPONSIVE |
235 | Zero switching |
237 | Phase controlled switching using electronic tube or a three or more terminal semiconductive device |
238 | With soft start |
239 | Including single unidirectional element with bidirectional pass |
240 | Including saturable inductor in trigger circuit |
241 | With digital control |
242 | Including ramp generator or controlled capacitor charging |
244 | With synchronization |
245 | With nonelectrical condition sensing |
246 | With plural condition sensing |
247 | Using a transformer or inductor as the final control device |
248 | Ferroresonant |
249 | Controllably saturable |
250 | With specific core structure (e.g., gap, aperture, slot, permanent magnet) |
251 | With plural power windings |
254 | With electronic tube or a three or more terminal semiconductive device in control circuit |
255 | Having a variable length winding (e.g., tapped) as the final control device |
256 | With motor driven tap switch |
257 | Including an electronic tube or a three or more terminal semiconductive device in control circuit |
258 | With electronic tube or a three or more terminal semiconductive device as tap switch |
259 | Having a winding in series with the source and load (e.g., buck-boost) |
260 | With motor in control circuit |
261 | With saturable reactor in control circuit |
262 | Plural windngs in series |
263 | With electronic tube or a three or more terminal semiconductive device in control circuit |
264 | Having movable structure or winding |
265 | Using a three or more terminal semiconductive device as the final control device |
266 | Including pre or post regulation |
267 | Including plural loads commonly controlled |
268 | Including plural final control devices |
269 | Linearly acting parallel connected |
270 | Linearly acting series connected |
271 | Switched (e.g., on-off control) |
273 | Linearly acting |
274 | With threshold detection |
275 | With plural condition sensing |
280 | With a specific feedback amplifier (e.g., integrator, summer) |
281 | With reference voltage circuitry |
282 | Switched (e.g., switching regulators) |
291 | Using an electronic tube as the final control device |
293 | Using an impedance as the final control device |
299 | INPUT LEVEL RESPONSIVE |
300 | Phase controlled switching using electronic tube or a three or more terminal semiconductive device |
301 | Using a transformer or inductor as the final control device |
303 | Using a linearly acting final control device |
304 | SELF-REGULATING (E.G., NONRETROACTIVE) |
305 | Using a transformer or inductor as the final control device |
306 | Ferroresonant |
310 | Controllably saturable |
311 | Using a three or more terminal semiconductive device as the final control device |
318 | EXTERNAL OR OPERATOR CONTROLLED |
319 | Zero switching |
320 | Phase controlled switching using electronic tube or a three or more terminal semiconductive device |
321 | With soft start |
322 | With digital control |
323 | With interval timer |
324 | Using single unidirectional element with bidirectional pass |
325 | With a three or more terminal semiconductive device in trigger circuit |
327 | With passive element only in trigger circuit |
328 | Using a transformer or inductor as the final control device |
329 | Controllably saturable |
330 | With permanent magnet |
331 | With core having a gap, aperture, or slot |
332 | With plural power windings |
333 | In bridge configuration or in bridge arm |
334 | On different legs of single core |
335 | On different cores |
338 | With plural cores |
339 | Including an electronic tube or a three or more terminal semiconductive device in control circuit |
340 | Having a variable length winding (e.g., tapped) as the final control device |
341 | With motor driven tap switch |
342 | With other transformer |
343 | With a three or more terminal semiconductive device |
344 | Having a windng in series with the source and load (e.g., buck-boost) |
345 | Having a switch in series with winding |
346 | Having series-parallel connectable windings |
347 | Having movable structure or winding |
349 | Using a three or more terminal semiconductive device as the final control device |
352 | Using an impedance as the final control device |
355 | INCLUDING A TRANSFORMER OR AN INDUCTOR |
356 | With compensation |
358 | Current transformer |
359 | Potential transformer |
360 | Superconductive |
361 | Polyphase or plural transformers |
362 | With core having permanent magnet or air gap |
363 | Inductor with or in a bridge |
364 | INCLUDING AN IMPEDANCE |
371 | MISCELLANEOUS |
CROSS-REFERENCE ART COLLECTIONS | ||
901 | STARTING CIRCUITS |
902 | OPTICAL COUPLING TO SEMICONDUCTOR |
903 | PRECIPITATORS |
904 | TOUCH SYSTEMS |
905 | LAMP DIMMER STRUCTURE |
906 | SOLAR CELL SYSTEMS |
907 | TEMPERATURE COMPENSATION OF SEMICONDUCTOR |
908 | INRUSH CURRENT LIMITERS |
909 | REMOTE SENSING |
910 | TWO OF THREE PHASES REGULATED |
911 | MEDICAL ELECTRONICS |
FOREIGN ART COLLECTIONS | ||
FOR000 | CLASS-RELATED FOREIGN DOCUMENTS |
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