US PATENT SUBCLASS 164 / 450.4
.~.~.~.~ Including optical sensor

Current as of: June, 1999
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164 /   HD   METAL FOUNDING

154.1  DF  CONTROL MEANS RESPONSIVE TO OR ACTUATED BY MEANS SENSING OR MEASURING A CONDITION OR VARIABLE (I.E., AUTOMATIC CONTROL) {6}
155.1  DF  .~ Control of feed material enroute to shaping area {5}
155.2  DF  .~.~ Responsive to material level {2}
449.1  DF  .~.~.~ In continuous casting apparatus {5}
450.4.~.~.~.~ Including optical sensor

DEFINITION

Classification: 164/450.4

Including optical sensor:

(under subclass 449.1) Apparatus having means for detecting the level of molten metal in the supply or mold comprising light detection means.

(1) Note. This subclass includes patents directed to the detection of both endophotonic (i.e., light generated by the melt or mold itself) and exophotonic (i.e., light generated by an external source) energy.

(2) Note. A patent claiming control of feed material in response to detection or recognition of an image related to the melt or mold is classified here.

SEE OR SEARCH CLASS

73, Measuring and Testing,

293, and 323+ for a device to measure liquid level using illumination or sight glass.

382, Image Analysis, appropriate subclasses for image recognition or processing, per se.