| 单词 | knife switch |
| 释义 | > as lemmasknife switch knife switch n. Electrical Engineering a switch consisting of a conducting blade or set of blades hinged at one end so that it may be swung out of or into a fixed contact or set of contacts at the other end. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > circuit > device to open or close circuit > [noun] > knife-switch knife switch1907 1907 H. H. Norris Introd. Study Electr. Engin. ix. 225 Open knife switches as described are not commonly used for circuit-breaking purposes above 500 volts and a few hundred amperes. 1910 Hawkins' Electr. Dict. 235/1 Knife switch, a switch having a movable blade of copper or brass which makes a contact between two parallel contact springs. 1962 Newnes Conc. Encycl. Electr. Engin. 726/2 Air-break isolators are made in a large variety of forms and range from the simple knife switch to those suitable for the highest transmission voltages. < as lemmas |
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