Model of "Cyclops" type multitubular vertical boiler

Model (scale 1:8) of "Cyclops" type multitubular vertical boiler Furneaux's patent 1898

The larger model shows an arrangement of boiler patented in 1898 by Mr. J. B. Furneaux. The shell is cylindrical with a closed segmental top, and the firebox is a truncated cone surmounted by a vertical cylindrical combustion chamber having a dished top. The cone is crossed by a large inclined water- tube, while from one side of the combustion chamber 130 fire tubes, arranged in vertical rows, extend radially to the shell. The ends of some of the tubes are contracted by ferrules to ensure equal distribution of the gases, which pass through them to an external smokebox carrying the funnel and provided with sliding doors to facilitate tube cleaning. Three small tubes, passing radially from the outside shell, admit warm air directly into the combustion chamber to prevent the discharge of smoke or unconsumed gases. The shell of the boiler is extended downward to form the sides of the ash pan; the grate, however, is not shown.