Brown’s Valve Gear

[DiodeDickParticipant @diodedick]

In ME 4725, Duncan Webster mused that the point of raising the cylinders was to keep them clear of the ground, which certainly was a consideration on the later KS Wren's.

In The Industrial Railway Record, Issue 60 – June 1975, the late Rodney Weaver states that the arrangement stemmed from the requirement that all the moving parts of a steam tram loco should be covered and that by raising the cylinders above the line of the (non-existent) running boards it was also possible to reduce the width of the loco and to do the oiling from inside the screens, without dismantling them.

His references were to The Engineer, 31st May 1878 (Graces Guide at a price, or possibly at a Reference Library near you and to an IRS publication "Indistrial Locomotives of Switzerland"

Issue 60 of the IRS Record is available on line and includes a Roger West drawing of an SLM loco with this valve gear.

Dick

[DiodeDickParticipant @diodedick]

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