US PATENT SUBCLASS 313 / 602
.~.~.~ Trigger electrode concentric with discharge electrode

Current as of: June, 1999
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313 /   HD   ELECTRIC LAMP AND DISCHARGE DEVICES

567  DF  WITH GAS OR VAPOR {24}
581  DF  .~ Three or more electrode discharge device {9}
601  DF  .~.~ Start electrode not in main discharge path {2}
602.~.~.~ Trigger electrode concentric with discharge electrode

DEFINITION

Classification: 313/602

Trigger electrode concentric with discharge electrode:

(under subclass 601) Subject matter wherein the start or the control electrode is placed with respect to one of the two discharge electrodes so that they both have a common axis.