Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise on the care and management of steam engines, boilers and electric machinery (1922)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 65
ere 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,… … 5^iG. 23 DUPLEX WATER TUBE BOILEB Duplex Water Tube Boiler 53 of the shell of the rear drum form the connection to a setof headers below it^ which are connected to the front drumby tubes expanded into the shell of the latter. This com-prises the upper generating system. These headers arelikewise…
