This design with natural induction used for marine purposes was the popular “Scotch” marine boiler, a scheme for a multi-tube one-pass horizontal boiler made up of two units: a firebox surrounded by water spaces and a boiler barrel consisting of two telescopic rings inside which were mounted 25 copper tubes; the tube bundle occupied much of the water space in the barrel and vastly improved heat transfer.
Government Printing Office The Official Gazette of the United States Patent Office (Washington, DC: Government Printing Office, 1895)
1940×2400, 1.3 MiB
827×1024, 237.5 KiB
517×640, 111.1 KiB
258×320, 33.6 KiB