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单词 plug-tree
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plug-tree
plug-tree n. Obsolete = plug-frame n.
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society > occupation and work > equipment > machine > machines which impart power > engine > steam engine > [noun] > parts of > valves > devices for opening or closing
scoggan1719
plug-frame1734
spanner1773
plug-tree1782
plug-rod1794
throttle lever1839
1782 J. Watt Let. 12 Dec. in J. P. Muirhead Origin & Progress Mech. Inventions J. Watt (1854) II. 170 An iron rack which comes down the plug-tree to a man's hand.
1825 ‘J. Nicholson’ Operative Mechanic 169 Mr. Henry Beighton, of Newcastle,..invented the part called the plug-tree, for opening and shutting the valves.
1875 E. H. Knight Pract. Dict. Mech. Plug-rod, (Steam-engine)..A rod attached to the working~beam of a condensing-engine, for the purpose of driving the working-gear of the valves. Sometimes called the plug tree.
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更新时间:2025/1/25 2:42:38