US PATENT SUBCLASS 361 / 292
.~.~.~ By varying effective area of electrode

Current as of: June, 1999
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361 /   HD   ELECTRICITY: ELECTRICAL SYSTEMS AND DEVICES

271  DF  ELECTROSTATIC CAPACITORS {4}
277  DF  .~ Variable {4}
287  DF  .~.~ Mechanically variable {5}
292.~.~.~ By varying effective area of electrode {6}
293  DF  .~.~.~.~> Disk trimmer
294  DF  .~.~.~.~> Direct travel piston type
295  DF  .~.~.~.~> Piston trimmer
296  DF  .~.~.~.~> Sliding plates
297  DF  .~.~.~.~> Spiral or helical plates
298.1  DF  .~.~.~.~> Rotary plates {5}

DEFINITION

Classification: 361/292

By varying effective area of electrode:

(under subclass 287) Subject matter having means to change the capacitance of the capacitor by changing the effective area of either the electrode plates or the dielectric with respect to one another.