| 释义 |
coherer Electr.|kəʊˈhɪərə(r)|
[f. cohere v. + -er1.]
A device consisting of a number of metal filings, wires, plates, etc., in loose contact which suffer a drop in resistance in the presence of high-frequency electromagnetic waves and used as a detector of such waves, chiefly in radio telegraphy; orig., the name given by Sir Oliver Lodge to the detector in the form of a glass cylinder containing metal filings, which cohere under the influence of an electromagnetic wave.
1894O. Lodge in Proc. Roy. Inst. XIV. 336 This arrangement, which I call a coherer, is the most astonishingly sensitive detector of Hertz waves. 1899W. Crookes in Rep. Brit. Assoc. Advancem. Sci. 1898 21 Oliver Lodge..produced the vacuum filing-tube coherers with automatic tapper-back. 1913‘Ian Hay’ Happy-go-lucky xiii, One could almost feel the Marconigrams radiating from Lady Adela. But apparently The Freak's coherer was out of order. 1923E. W. Marchant Radio Telegr. iv. 38 The ‘welding’ of the particles in the coherer continues until something is done to break the connection between them. 1959Chambers's Encycl. XI. 475/1 The coherer is suitable only for telegraphic reception. |