| 单词 | helve-hammer |
| 释义 | > as lemmashelve-hammer 2. (Also helve-hammer.) A tilt-hammer, the helve of which oscillates on bearings, so that it is raised by a cam carried by a revolving shaft, and falls by its own weight. ΘΚΠ society > occupation and work > equipment > metalworking equipment > [noun] > forging equipment > forge-hammer tilt-hammer1773 trip-hammer1781 forge-hammer1815 skelper1831 tilt1831 oliver1846 set-hammer1855 helve-hammer1858 striker1869 belly-helve1881 society > occupation and work > equipment > driving or beating tools > [noun] > hammer > mechanical and power hammers > types of tilt-hammer1773 trip-hammer1781 tilt1831 Nasmyth1845 oliver1846 helve-hammer1858 striker1869 belly-helve1881 chipping hammer1988 1858 P. L. Simmonds Dict. Trade Products Helve-hammer. 1879 Cassell's Techn. Educator (new ed.) I. 410 Before the introduction of Nasmyth's patent, the only assistance which steam had given to human labour in forging was the helve or tilt-hammer..It is..a lever of the first order. 1881 Trans. Amer. Inst. Mining Engineers 1880–1 9 145 Helve, a lift-hammer for forging blooms. 1894 Harper's Mag. Jan. 422 The helve-hammer and the trip~hammer are essentially the same—each consists of a heavy head attached to a beam mounted on gudgeons, which is lifted at..intervals by a cam carried by a revolving shaft. < as lemmas |
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