from The Century Dictionary and Cyclopedia
- n. The casing or box inclosing the valve of a steam-engine. See steam-chest, 1.
Sorry, no etymologies found.
The parts between the tube z z and the cylinder A A, that is the slide valve in the valve-chest K K, and the two tubes d and e allow the steam to pass first below and then above the piston, while at the same time the steam has free exit from the other half of the cylinder.