US PATENT SUBCLASS 340 / 612
.~.~.~ Material level


Current as of: June, 1999
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340 /   HD   COMMUNICATIONS: ELECTRICAL

500  DF  CONDITION RESPONSIVE INDICATING SYSTEM {6}
540  DF  .~ Specific condition {18}
603  DF  .~.~ Fluent material {7}
612.~.~.~ Material level {6}
613  DF  .~.~.~.~> Weight in container
614  DF  .~.~.~.~> Pressure
615  DF  .~.~.~.~> Moving sensor (e.g., impeller)
616  DF  .~.~.~.~> Overflow
617  DF  .~.~.~.~> Pulverant material (e.g., bin)
618  DF  .~.~.~.~> Liquid {5}


DEFINITION

Classification: 340/612

Material level:

(under subclass 603) Subject matter wherein the monitored conditions is the height of the material with respect to a reference position.

SEE OR SEARCH CLASS

73, Measuring and Testing,

290+, for measurement of liquid or dry fluent material

level.

164, Metal Founding,

155.2+, for a metal casting apparatus including control means responsive to material level.

200, Electricity: Circuit Makers and Breakers, 61.2+, for level responsive switch, per se.