US PATENT SUBCLASS 122 / 447
.~.~.~ Cutoff

Current as of: June, 1999
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122 /   HD   LIQUID HEATERS AND VAPORIZERS

*  DD  REGULATION {2}
*  DD  .~ Fuel and water {2}
446  DF  .~.~ Fluid fuel {1}
447.~.~.~ Cutoff

DEFINITION

Classification: 122/447

(under subclass 446) Devices with automatic mechanism for

cutting off the fuel supply when the water level in the boiler becomes either too high or too low or both.

SEE OR SEARCH CLASS

236, Automatic Temperature and Humidity Regulation, for such controls, per se.