Model (scale 1:12) of "Gateshead" type multitubular vertical boiler Furneaux and Woodison' s patent

Model (scale 1:12) of "Gateshead" type multitubular vertical boiler Furneaux and Woodison' s patent, 1899

The larger model shows an arrangement of boiler patented in 1898 by Mr. J. B. Furneaux. The smaller model represents a modification of this arrangement patented in 1899 by Messrs. J. B. Furneaux and W. A. Woodison. The combustion chamber or flue tube is divided halfway up by a horizontal diaphragm of fire-clay, so notched that it can be passed up from below and then rest on ferrules projecting from some of the tubes. In this way the hot gases are caused to pass through the lower rows of tubes to the smokebox on the outside, whence they return through the upper rows to the flue and pass out by a central chimney. There are ninety-six of these tubes arranged in vertical rows, but the whole circumference is not occupied, two spaces being left for scaling purposes, and the smokebox is formed in two portions.