US PATENT SUBCLASS 337 / 244
.~.~.~.~.~ Movable or displaceable element (e.g., plunger or semaphore)

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}
227  DF  .~.~ Fuse link carrier or holder {2}
228  DF  .~.~.~ Cartridge or tube {9}
241  DF  .~.~.~.~ With indicating or inspection means {3}
244.~.~.~.~.~ Movable or displaceable element (e.g., plunger or semaphore)

DEFINITION

Classification: 337/244

(under subclass 241) Subject matter wherein the indicating or inspection means comprises a mechanical device capable of changing its position in response to a blown condition of the fusible element. For example, the indicating means may consist of a slidable plunger or semaphore.

(1) Note. In several of the patents classified herein, the plunger type indicator comprises a striker pin device which may or may not perform another function such as an actuator for some external device. These are classified here on the assumption that the primary function of the striker pin is as an indicator of the condition of the fuse element.

SEE OR SEARCH THIS CLASS, SUBCLASS:

267, for plug type fuse carriers with plunger or semaphore type indicators.

SEE OR SEARCH CLASS

116, Signals and Indicators, 216+, for fusible thermal indicators.

200, Electricity: Circuit Makers and Breakers,

308+, for indicator structure for mechanical switches.

340, Communications: Electrical,

638+, for automatic signals and/or indicators which are responsive to the blown condition of a fuse and employ plunger means.