US PATENT SUBCLASS 164 / 155.5
.~.~.~ Responsive to rate of change

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}
155.4  DF  .~.~ Responsive to position or spatial dimension {1}
155.5.~.~.~ Responsive to rate of change

DEFINITION

Classification: 164/155.5

Responsive to rate of change:

(under subclass 155.4) Apparatus wherein the process parameter monitored is a mathematical derivative (e.g., first, second, third, etc.) of the location or size of the product, melt, or any component of the apparatus with respect to time.

SEE OR SEARCH CLASS

73, Measuring and Testing,

488+, for a device to measure speed and subclasses 861+ for a

device to measure volume or flow rate.