Model, scale 1: 12, of corrugated Galloway tubes for furnace flues

Model (scale 1: 12) of corrugated Galloway tubes for furnace flues

This is one of three models of boiler furnace flue patented by Samson Fox in 1877. The traditional plain cylindrical furnace subjected to collapsing pressure showed its instability as pressures increased, and many devices were resorted to for the purpose of preventing its distortion and consequent collapse. Fox's invention was extensively adopted, and it is claimed that, in addition to the increased strength obtained, the flue will easily alter in length without requiring any separate expansion rings, and has also an increased heating surface.