US PATENT SUBCLASS 361 / 200
.~.~.~.~ Threshold device (neon tube)

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

139  DF  CONTROL CIRCUITS FOR ELECTROMAGNETIC DEVICES {7}
160  DF  .~ For relays or solenoids {11}
195  DF  .~.~ Time delay {3}
199  DF  .~.~.~ Including electric discharge device {1}
200.~.~.~.~ Threshold device (neon tube) {1}
201  DF  .~.~.~.~.~> Including thyratron

DEFINITION

Classification: 361/200

Threshold device (neon tube):

(under subclass 199) Subject matter wherein the electric discharge device conducts current when the potential applied across it reaches a specific value.

SEE OR SEARCH THIS CLASS, SUBCLASS:

197, and 205, for threshold devices in other control circuits.