US PATENT SUBCLASS 337 / 18
.~.~.~ Gaseous space discharge gap (e.g., air gap)

Current as of: June, 1999
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337 /   HD   ELECTRICITY: ELECTROTHERMALLY OR THERMALLY ACTUATED SWITCHES

14  DF  ELECTROTHERMALLY ACTUATED SWITCHES {9}
15  DF  .~ Shunt or short circuit completion devices {4}
17  DF  .~.~ Fusible material combined with gap {1}
18.~.~.~ Gaseous space discharge gap (e.g., air gap)

DEFINITION

Classification: 337/18

(under subclass 17) Subject matter wherein the insulating gap is an air gap.

SEE OR SEARCH CLASS

361, Electricity: Electrical Systems and Devices,

115+, especially subclasses 124+ for lightning arresters with fusible links.