US PATENT SUBCLASS 335 / 49
.~.~ With liquid-displacement means

Current as of: June, 1999
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335 /   HD   ELECTRICITY: MAGNETICALLY OPERATED SWITCHES, MAGNETS, AND ELECTROMAGNETS

2  DF  ELECTROMAGNETICALLY ACTUATED SWITCHES {30}
47  DF  .~ Utilizing conductive liquid (e.g., mercury) {4}
49.~.~ With liquid-displacement means {3}
50  DF  .~.~.~> Comprising plural interconnected liquid containers
51  DF  .~.~.~> Magnetic {1}
54  DF  .~.~.~> Tiltable or rotating liquid chamber

DEFINITION

Classification: 335/49

(under subclass 47) Subject matter wherein the structure includes means whereby an electrical circuit, or circuits, is completed when the conductive liquid is displaced from a first position in which the continuity of a conductive path between two or more electrodes is interrupted to a second position in which the path is completed through the liquid, the condition of the controlled circuit at all times being dependent upon the position of the liquid. The displacement means is generally of the magnetically controlled plunger type but may consist of means for tilting the chamber holding the liquid.

SEE OR SEARCH CLASS

200, Electricity: Circuit Makers and Breakers,

32, for periodic switches with liquid contacts, subclass 80 for centrifugal switches which may use a displaceable liquid conductor for performing circuit controlling operations, and subclass 152 for nonelectromagnetically operated mercury switches in general.

337, Electricity: Electrothermally or Thermally Actuated Switches,

21, for electrothermal switches utilizing physical changes in a conductive fluid.