US PATENT SUBCLASS 337 / 134
.~.~.~.~ With magnetic biasing or holding means

Current as of: June, 1999
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337 /   HD   ELECTRICITY: ELECTROTHERMALLY OR THERMALLY ACTUATED SWITCHES

14  DF  ELECTROTHERMALLY ACTUATED SWITCHES {9}
123  DF  .~ With longitudinally expansible solid element (e.g., rod, wire strip, etc.) {7}
126  DF  .~.~ With manual or other mechanical contact actuating means {3}
131  DF  .~.~.~ Snap-action (e.g., bistable) {4}
134.~.~.~.~ With magnetic biasing or holding means

DEFINITION

Classification: 337/134

(under subclass 131) Subject matter including means whereby a field of magnetic flux is set up in the vicinity of the main contacts. The force exerted by the magnetic flux field is utilized either to detract from or add to the force exerted by a mechanical actuating means resulting in a rapid movement of the contacts upon the magnetic force or the spring force being overcome one by the other.

SEE OR SEARCH THIS CLASS, SUBCLASS:

54, and 90, for electrothermally responsive bimetallic element actuated snap switches with magnetic means.

344, for thermal, bimetallic element snap action switch with magnetic flux source.

366, for similar devices with thermally responsive actuation means.

SEE OR SEARCH CLASS 335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,

153, for reed type vacuum enclosed switches with permanent magnet structure.