Appleton's dictionary of machines, mechanics, engine-work, and engineering : illustrated with four thousand engravings on wood ; in two volumes (1873)
D. Appleton and Company · New York : D. Appleton and Co. · leaf 486
)■, the valve-lever, working outside of the pile-case, but having a small friction-roller attached to ;t5inner end, and situated so as to come under the action of the inclined plane d oo. X, the trigger, the function of wliich is to keep the steam-valve in such a position as to prevent theadmission…
Mechanical engineering · Mechanics · Engineering
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