US PATENT SUBCLASS 337 / 174
.~.~.~.~ With holding, latch or trip means

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.~.~.~.~ With holding, latch or trip means {2}
175  DF  .~.~.~.~.~> Combined latch or trip
176  DF  .~.~.~.~.~> Fusible element controlled {3}

DEFINITION

Classification: 337/174

(under subclass 171) Subject matter including significant details of means whereby the fuse contacts are operatively retained in electrical conductive relationship with the line terminals by latch, detent or other holding means until released as a result of excessive electrothermal current, manually at the will of an operator, or a combination of both. The latching or holding means is usually maintained in an operative position by the tension of a fuse link but may be operated by any appropriate thermal current responsive means; for instance, a bimetallic element or even an auxiliary fuse device.

(1) Note. For other latching or holding mechanisms used in the devices of this class, see the subclasses listed under SEARCH THIS CLASS, SUBCLASS in subclass 46.

SEE OR SEARCH CLASS

200, Electricity: Circuit Makers and Breakers,

318+, for details of latch structure in general.