| 释义 |
triblet|ˈtrɪblɪt|
Also 8 triboulet, 9 treblett, tribolet.
[= F. triboulet in the sense ‘wooden cylinder used by goldsmiths for rounding articles’ (Littré); of uncertain origin: see Littré.]
A cylindrical rod or mandrel used for forging nuts, rings, tubes, etc., or for drawing lead-pipe. Also attrib.: triblet tubes, thin tubes which slide one upon the other, as in a telescope.
1611Cotgr., Triboulet, a Triblet; the toole whereon Goldsmiths and Clockmakers put Rings, and little wheeles, when they file, or otherwise worke, them. 1736Ainsworth Lat. Dict. i, A triblet, or triboulet (goldsmith's tool for making rings). 1778Nairne in Phil. Trans. LXVIII. 854 In the uppermost room stood a large iron triblet, of about three feet in height. 1853Ure Dict. Arts I. 724 A mandril,..which consists of a long rod of iron, having a short steel treblett on its end. 1877Knight Dict. Mech. s.v., The nut having been cut from the bar, the hole is punched and enlarged by the triblet. 1895Model Steam Engine 95 Triblet drawn tube (i.e., tube made by drawing a steel mandrel through the inside as well as drawing the outside through a hole). |