单词 | plug-tree |
释义 | > as lemmasplug-tree ΘΚΠ 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. < as lemmas |
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