(under the class definition) Subject matter relating to boilers, water heaters, or cooling devices for furnace walls having a closed chamber or conduit combined with a conventional type of furnace employed in a special art.
(1) Note. If the cooling device is not a closed chamber or conduit, it will be classified in the type of furnace of the special art. Class 122 includes such devices known as bosh plates, water cooled walls and roofs, linings, and water cooled tuyeres when the cooling device is a closed chamber or conduit and there is otherwise no novelty in the invention.
SEE OR SEARCH CLASS
48, Gas: Heating and Illuminating,
63+, and 67, for gas producers using similar structure.
266, Metallurgical Apparatus, 190, and 241 for cooling features in devices of that class.
431, Combustion,
160, for a furnace type combustion chamber having means directing nonliquid cooling medium across elements of a device dispersing fuel into a furnace.
432, Heating,
233+, for a residual material heating apparatus element having protective cooling structure.
