Twentieth century hand-book for steam engineers and electricians with questions and answers; a practical non-technical treatise .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 65
e there is no ebulli-tion, and elimination of a great many parts of the undu-lating header type of boiler. The design of the boiler showsabsence of stay-bolted surfaces, the drums are not exposedto the direct action of the fire, all seams or rivets are en-tirely removed from contact with the heat,… … Fig. 23duplex water tube boilek Duplex Water Tube Boiler 53 of the shell of the rear drum form the connection to a set. of headers below it, which are connected to the front drumf by tubes expanded into the shell of the latter. This com-prises the upper generating system. These headers are;…
