(under subclass 51) Devices having compartments separated by metal diaphragms transversely arranged inside the boiler, or to boilers having a combustion chamber intermediate the ends, with transverse diaphragms at each end of the combustion chamber, or to separate boilers in alinement. This subclass includes patents for progressively heating water fed to the boiler and also where the diaphragm is only for supporting the tubes to prevent vibration or where the diaphragms are for circulation purposes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
101, 123, for vertical fire tube boilers with transverse diaphragms and having separate compartments.
