US PATENT SUBCLASS 337 / 179
.~.~.~.~.~.~ With delayed action

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}
168  DF  .~.~ Cutout or disconnect type (an assembly) of a fuse support and fuse holder with or without a fuse link) {3}
171  DF  .~.~.~ With dropout features (i.e., the fuse tube will be separated, or drop away from, at least on the main circuit contacts) {3}
174  DF  .~.~.~.~ With holding, latch or trip means {2}
176  DF  .~.~.~.~.~ Fusible element controlled {3}
179.~.~.~.~.~.~ With delayed action

DEFINITION

Classification: 337/179

(under subclass 176) Subject matter including significant means whereby the movement of the fuse tube is delayed for a predetermined time interval after the melting or blowing of the fuse element. The time interval is generally designed to be sufficiently long for the expelled gases from the tube to become adequately dispelled and/or deionized to an extent where they are no longer conducting.