US PATENT SUBCLASS 337 / 247-- .~.~.~.~.~ Plural tubes (e.g., telescoping)

US PATENT SUBCLASS 337 / 247
.~.~.~.~.~ Plural tubes (e.g., telescoping)

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}
246	DF	.~.~.~.~ Cartridge or tube structure or material of construction {1}
247		.~.~.~.~.~ Plural tubes (e.g., telescoping)

DEFINITION

Classification: 337/247

(under subclass 246) Subject matter wherein the cartridge or tube structure is recited as comprising at least two separate tubular elements interfitted one with the other. The tubes may be fixedly related or relatively movable. They may be of diverse electrical or material characteristics, as for example, a frangible tube within a metallic or other reinforcing tube.

SEE OR SEARCH THIS CLASS, SUBCLASS:

273+, for devices having a liner consisting of gas evolving material whose sole purpose in the combination is for the prevention of or smothering of an arc.