US PATENT SUBCLASS 324 / 412
.~.~.~.~.~ Pulsating or alternating current for the anode

Current as of: June, 1999
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324 /   HD   ELECTRICITY: MEASURING AND TESTING

403  DF  ELECTRIC LAMP OR DISCHARGE DEVICE {3}
405  DF  .~ Vacuum tube {5}
409  DF  .~.~ Testing discharge space characteristic (e.g., emission) {1}
410  DF  .~.~.~ With application of current or potential to the discharge control means {1}
411  DF  .~.~.~.~ Pulsating or alternating current or potential for the discharge control means {1}
412.~.~.~.~.~ Pulsating or alternating current for the anode

DEFINITION

Classification: 324/412

Pulsating or alternating current for the anode:

(under subclass 411) Subject matter wherein the circuit used in making the test includes means to impress pulsating or alternating current or potential upon the anode of the vacuum tube.