(under the class definition) Horizontal cylindrical boilers having an offset subjacent firebox provided with a water-cooled roof. The firebox in addition to the water roof may also have one or more of its walls water-cooled, thereby forming an offset subjacent water firebox.
SEE OR SEARCH THIS CLASS, SUBCLASS:
93+, for offset water fireboxes for a horizontal fire tube boiler.
190, for offset fireboxes, for horizontal cylinder boilers.
209, and 213, for this feature in sectional boilers.
238, 336 and 352, for water tube boilers with offset fireboxes.
