| 单词 | Ruhmkorff |
| 释义 | Ruhmkorff Physics. Obs. except Hist.|ˈruːmkɔːf|
The name of Heinrich Daniel Ruhmkorff (1803–77), German-born inventor, used attrib., absol. and in the possessive to designate a powerful type of induction coil first made by him.
[1852W. R. Grove in Phil. Mag. IV. 500, I procured one of these apparatus from M. Ruhmkorff: the size of the coil portion of the apparatus is 6·5 inches long, 4 inches diameter.] 1855― in Ibid. IX. 1 If a small Leyden phial have its coatings connected respectively with the extremities of the secondary wire of a Ruhmkorff coil (the primary being, as usual, connected with the condenser of M. Fizean, and two wires being attached to the terminals and brought within striking distance), the noise and brilliancy of the discharges are greatly increased. 1878Encycl. Brit. VIII. 103/1 The type of these is the induction coil or inductorium, sometimes called Ruhmcorff's coil, after the great Parisian instrument-maker who first brought the instrument to perfection. 1908Rep. Brit. Assoc. Adv. Sci. 1907 621 The aërials connected through the secondary of a peculiarly made Ruhmkorff coil constitute one oscillating system of a low frequency. Ibid. 622 When the swing is worked up they burst through the spark gap, short-circuiting out the Ruhmkorff. 1971Sci. Amer. May 82/2 The final phase of the coil's development was reached during the 1850's. Heinrich Daniel Ruhmkorff, a German instrument maker living in Paris, turned his attention in 1851 to the construction of better and more powerful coils... The quality of his products quickly brought him fame, and such coils soon became known as Ruhmkorff coils. |
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