US PATENT SUBCLASS 337 / 123
.~ With longitudinally expansible solid element (e.g., rod, wire strip, etc.)

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


337 /   HD   ELECTRICITY: ELECTROTHERMALLY OR THERMALLY ACTUATED SWITCHES

14  DF  ELECTROTHERMALLY ACTUATED SWITCHES {9}
123.~ With longitudinally expansible solid element (e.g., rod, wire strip, etc.) {7}
124  DF  .~.~> With voltage or ambient temperature compensation means
125  DF  .~.~> With electrical shunting or short-circuiting means
126  DF  .~.~> With manual or other mechanical contact actuating means {3}
137  DF  .~.~> Contact structure or composition
138  DF  .~.~> Cyclically or periodically operated (e.g., flasher)
139  DF  .~.~> With significant expansible element structure or composition of material {1}
141  DF  .~.~> With external or auxiliary heating means

DEFINITION

Classification: 337/123

(under subclass 14) Subject matter wherein the electrothermally actuated switching device comprises at least one monometallic longitudinally expansible solid element whose coefficient of expansion along its major axis is utilized to cause the opening or closing of an electrical circuit as a result of the change in dimension of the element. The element may be fixedly secured at both ends, around its circumference or at one end, according to the

design of the switch.

SEE OR SEARCH THIS CLASS, SUBCLASS:

382+, below for similar devices utilizing thermally responsive solid elements.

SEE OR SEARCH CLASS

60, Power Plants,

527+, for expansion and contraction type power plants with solid elements. 219, Electric Heating,

512, for automatic switching arrangements in the circuit of an electric heater and utilizing linearly expansible metal.

335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,

141, for electromagnetically operated switches with thermally responsive expandable solid.

374, Thermal Measuring and Testing,

187+, for expanding solid thermometers.