US PATENT SUBCLASS 337 / 171
.~.~.~ With dropout features (i.e., the fuse tube will be separated, or drop away from, at least on the main circuit contacts)

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.~.~.~ With dropout features (i.e., the fuse tube will be separated, or drop away from, at least on the main circuit contacts) {3}
172  DF  .~.~.~.~> Utilizing combined mechanical motions (e.g., sliding with pivotal)
173  DF  .~.~.~.~> Utilizing sliding or reciprocating motions
174  DF  .~.~.~.~> With holding, latch or trip means {2}

DEFINITION

Classification: 337/171

(under subclass 168) Subject matter including means whereby the fuse carrier (tube) structure changes its position upon the rupture of a fuse link in such a manner as to present an air gap between at least one fuse contact and the corresponding line terminal. The motion of the fuse assembly may be along its axial direction (sliding) or in a plane about a perpendicular to the tube axis (rotary). The drop out action is usually gravity actuated upon the rupture of a fuse link and the resulting freeing of some latching means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

217+, for so-called expulsion type fuse devices which are fuse devices wherein the remains of the fuse link, after failure takes place, are forcibly removed from the tube by some means such as gaseous pressure or mechanical means.