| 释义 |
Nasmyth|ˈneɪsmɪθ|
The name of James Nasmyth (1808–1890), Scottish engineer, used attrib. and in the possessive to denote a form of hammer or pile-driver he invented, in which the falling weight is raised by steam pressure on a piston attached to it.
1845Jrnl. Franklin Inst. XL. 283 Nasmyth's steam hammer for pile driving. a1877Knight Dict. Mech. III. 2348/2 Plate LXII shows the new Nasmyth steam-hammer at Woolwich, England. It is at present the largest and most powerful in the world. 1902L. F. Vernon-Harcourt Civil Engin. iv. 56 Nasmyth's pile-driver is the oldest and best-known form of these machines. 1928R. Bridges in H. Bradley Coll. Papers 43 A friend whose mind I used to compare to a Nasmyth's hammer, which can weld a ton of iron or crack a nut without crushing its kernel. 1945R. Hargreaves Enemy at Gate 278 Bringing, in effect, a Nasmyth hammer to the task of cracking a walnut. 1963A. F. Burstall Hist. Mech. Engin. vi. 207 Considerable improvements took place in forging, particularly after the invention of Nasmyth's steam hammer..in 1839. |