Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 802
ly the lower and upper seats, the upper scat being formed on tin- circumferenceof a disk supported by across; gg, cast in the centre of the rin^, forming the lo the valve A is funned by a hollow cylinder, the lower part of which being turned in, as Bhown, forms the valve-face t; that rests on the… … The Bteam-valve h, thus drawn and descrih I, does not differ materially, if in an from a Cornish double-beat valve; and we have been thus particular in describing il i explain the manner in which to alter it, the alteration constituting the material part of the invention Jt will be observed by a…
Mechanical engineering
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