Well-Known MemberHMEM Supporting Member
- Mar 24, 2011
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- UK, Warwickshire
In the era of steam locomotives with inside cylinders with valves between, they were very tight for space and the valve was usually driven by a rectangular buckle. There was not much clearance between the backs of the valves, so the valve rods from the buckles were cranked inside the steam chest towards the portface to allow room for the two glands and the drive knuckles.