| 单词 | plug and feather |
| 释义 | > as lemmasplug and feather b. A metal wedge, driven between two other wedges (known as feathers) to split rock or stones. Frequently in plug and feather. See also feather n. 1b. ΘΚΠ society > occupation and work > equipment > mining equipment > [noun] > wedges, etc. gad1671 plug1747 stook and coil1808 stook and feathers1808 Jack1846 stob1883 1747 W. Hooson Miners Dict. sig. C1v [If a hole be bored slanting or upwards] some miners in thise case use a Plug and Feather. 1842 J. Gwilt Encycl. Archit. Gloss. 1017 Plug And Feather, or Key and Feather, a name given to a method of dividing hard stones by means of a long tapering wedge called the key, and wedge-shaped pieces of iron called feathers. 1894 R. O. Heslop Northumberland Words (at cited word) The plug and feather was introduced into coal mining by Mr. G. C. Greenwell in 1869. It had been from early times used in lead mining. 1947 J. C. Rich Materials & Methods Sculpt. ix. 278 Metallic wedges, or ‘plugs’, and ‘feathers’ are inserted into the holes [in stone splitting] and lightly tapped in succession until the block is split. 1991 D. Parsons in J. Blair & N. Ramsay Eng. Medieval Industries i. 5 Detaching them [sc. blocks] from the parent rock required considerably more skill than did the digging of the rubble. The method is likely to have been the traditional plug-and-feather technique or a version of it. < as lemmas |
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