单词 | knuckle-joint |
释义 | ˈknuckle-ˌjoint 1. lit. Each joint of the knuckles (of the hands), or the joint of the leg of an animal called a knuckle. 2. Mech. A joint or coupling forming a connexion between two parts of a mechanism, in which a projection in one is inserted into a corresponding recess in the other (like the knuckles of the two hands when clasped or placed together); also extended to other joints, such as universal joints.
1863–9Dict. Archit., Knuckle Joint, an old name for a Rule Joint. 1873Spon's Dict. Engineering 2663 The knuckle⁓joint, at the back of the vibrating form-frame. 1881Young Every Man his own Mechanic §819 Some of these racks are fitted in the centre with a grooved joint technically called a ‘knuckle joint’. 1887D. A. Low Machine Draw. (1892) 100 Form of ordinary knuckle joint. Hence knuckle-ˈjoint v.
1900Westm. Gaz. 27 Dec. 5/3 The plates will be placed on in dovetail fashion,..the Herreshoffs having decided that the plan of *knuckle-jointing them was not feasible. |

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