US PATENT SUBCLASS 323 / 244
.~.~ With synchronization

Current as of: June, 1999
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323 /   HD   ELECTRICITY: POWER SUPPLY OR REGULATION SYSTEMS

234  DF  OUTPUT LEVEL RESPONSIVE {6}
237  DF  .~ Phase controlled switching using electronic tube or a three or more terminal semiconductive device {8}
244.~.~ With synchronization

DEFINITION

Classification: 323/244

With synchronization:

(under subclass 237) Subject matter including means which detects a time characteristic of the input waveform, such as its zero crossing point, and produces a signal indicative thereof which is used to properly time the action of the final control device.