(under subclass 459) Subject matter relating to devices for superheating steam indirectly by heating a fluid or fusible solid and transferring the heat of the fluid or melted mass to the steam.
(1) Note. Compare the subclasses, in this class, indented under Indirectly heated, separate fluid.
SEE OR SEARCH THIS CLASS, SUBCLASS:
479.1, for this type of superheater having an automatic temperature regulator.
