coherern.
/kəʊˈhɪərə/ 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; originally, 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.
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society > communication > telecommunication > radio communications > radio equipment > [noun] > radio set > receiver > parts of
coherer1894
radioconductor1897
barretter1903
cat's whisker1915
dial1922
radio dial1922
chassis1931
front end1938
1894 O. Lodge in Notices Proc. Royal Inst. Great Brit. 14 336 This arrangement, which I call a coherer, is the most astonishingly sensitive detector of Hertz waves.
1899 W. Crookes in Rep. Brit. Assoc. Advancem. Sci. 1898 21 Oliver Lodge..produced the vacuum filing-tube coherers with automatic tapper-back.
1913 ‘I. 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.
1923 E. 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.
1959 Chambers's Encycl. XI. 475/1 The coherer is suitable only for telegraphic reception.
This entry has not yet been fully updated (first published 1933; most recently modified version published online December 2019).
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n.1894