(under the class definition) Subject matter relating to closed water chambers, tanks or receptacles usually known in the art as "range" or "stand" boilers, whose structure is modified for the purposes of applying heat directly to the boiler.
(1) Note. See also the proper structural subclass, for auxiliary heaters for stand boilers in this class. For example, if it is a sectional water heater, that type of heater; if it is a water tube type heater, search the type subclass under water tube boilers. See subclasses 210 and 250, of this class.
SEE OR SEARCH THIS CLASS, SUBCLASS:
20, for water heaters, some of which may be connected to heat water for a stand boiler.
SEE OR SEARCH CLASS
126, Stoves and Furnaces, for combinations of cooking or heating stoves, water or steam generators, circulating system of pipes and stand boilers heated by water-boilers, and solar heaters and steam; especially
5, 34, 35, 350 and 351, for water heaters applicable to stand boilers that are not classified in this class (122); 361, 364+, 415+, 417+, and 452, for ordinary stand boilers with water heaters and circulation systems, and 363, for boiler supports that may have a heating burner.
