US PATENT SUBCLASS 337 / 274
.~.~.~ Plural (e.g., auxiliary fuse)

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

14  DF  ELECTROTHERMALLY ACTUATED SWITCHES {9}
142  DF  .~ Fusible element actuated {15}
273  DF  .~.~ With arc suppression or extinguishing means {6}
274.~.~.~ Plural (e.g., auxiliary fuse) {1}
275  DF  .~.~.~.~> With draw-out rod

DEFINITION

Classification: 337/274

(under subclass 273) Subject matter wherein the arc suppression of quenching structure includes at least two or more means adapted to act conjointly or independently to suppress or smother the arc. For example, the separate means may comprise gas evolving material acting conjointly with magnetic means, etc., or may include the so-called "multibreak" devices in which a series of arcs are generated, thereby providing arc extinguishing gas blasts at each point of break or rupture.

SEE OR SEARCH CLASS

218, High-Voltage Switches With Arc Preventing and Extinguishing Devices,

2+, for multiple break arc preventing and extinguishing means for mechanical switches.