US PATENT SUBCLASS 313 / 231.21
.~.~ Expulsion type

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

231.01  DF  FLUENT MATERIAL SUPPLY OR FLOW DIRECTING MEANS {3}
231.11  DF  .~ Lightning or surge arrester {1}
231.21.~.~ Expulsion type

DEFINITION

Classification: 313/231.21

Expulsion type:

(under subclass 231.11) Subject matter including an arcing chamber in which a gas evolving or other arc-extinguishing material is brought into contact with the arc to interrupt the follow current.