US PATENT SUBCLASS 60 / 665
.~.~.~ And of or by boiler liquid level or feed

Current as of: June, 1999
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60 /   HD   POWER PLANTS

643  DF  MOTIVE FLUID ENERGIZED BY EXTERNALLY APPLIED HEAT {11}
660  DF  .~ Having condition responsive control {6}
664  DF  .~.~ Of or by heat source material or element {1}
665.~.~.~ And of or by boiler liquid level or feed

DEFINITION

Classification: 60/665

(under subclass 664) Apparatus, including means varying or modifying the action of heat supply structure and also means regulating the supply of motive liquid to or quantity of liquid and vaporizing structure.

SEE OR SEARCH CLASS

122, Liquid Heaters and Vaporizers,

448.1, and 449, for the automatic regulation of boiler fuel and feed.

236, Automatic Temperature and Humidity Regulation,

14, for the automatic temperature regulation of the condition of a boiler and a combustion chamber heating it.