释义 |
sparkless, a.|ˈspɑːklɪs| [f. spark n.1 + -less.] Free from or devoid of sparks; emitting no sparks.
1821Shelley Adonais xl, Nor, when the spirit's self has ceased to burn, With sparkless ashes load an unlamented urn. 1851Mrs. Browning Casa Guidi Wind. ii. 290 Like an anvil black And sparkless. 1881Standard 14 Sept. 3/1 The engine should be..smokeless, as noiseless as possible, but sparkless is imperative. b. spec. in Electr.
c1865Wylde's Circ. Sciences I. 272/1 The relays are ‘sparkless’. 1890Telegr. Jrnl. 21 Feb. 203/2 The impossibility of making a sparkless commutator. Hence ˈsparklessly adv.
1891in Cent. Dict. 1906H. M. Hobart Elem. Princ. Continuous-Current Dynamo Design iv. 106 Prior to coming into the position of short-circuit under the brush, it has been carrying a current of, say, 100 ampères in one direction. Immediately after emerging from the position of short-circuit, it will be carrying a current of 100 ampères in the opposite position. The change must take place sparklessly. |