US PATENT SUBCLASS 337 / 108
.~.~.~.~ Arc or spark gap

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

14  DF  ELECTROTHERMALLY ACTUATED SWITCHES {9}
36  DF  .~ With bimetallic elements (i.e., motion takes place in a plane at right angles to its major axis) {10}
102  DF  .~.~ With external or auxiliary heating means {4}
107  DF  .~.~.~ Significant heating element structure or composition {1}
108.~.~.~.~ Arc or spark gap

DEFINITION

Classification: 337/108

(under subclass 107) Subject matter including means whereby the bimetallic element is heated by the arc or discharge current occurring between two electrodes separated by an open gap.

SEE OR SEARCH CLASS

313, Electric Lamp and Discharge Devices, appropriate subclasses, especially

118+, for spark plug type discharge devices.

361, Electricity: Electrical Systems and Devices,

117+, for high voltage dissipating gaps to the lightning arrester type, and subclasses 253+ for electric spark gap igniters.