Coherer
Coherer Co*her"er, n. (Elec.) Any device in which an imperfectly conducting contact between pieces of metal or other conductors loosely resting against each other is materially improved in conductivity by the influence of Hertzian waves; -- so called by Sir O. J. Lodge in 1894 on the assumption that the impact of the electic waves caused the loosely connected parts to cohere, or weld together, a condition easily destroyed by tapping. A common form of coherer as used in wireless telegraphy consists of a tube containing filings (usually a pinch of nickel and silver filings in equal parts) between terminal wires or plugs (called

{conductor plugs}). [Webster 1913 Suppl.]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • cohérer — [kɔeʀe] v. [CONJUG. céder.] ÉTYM. 1897; de cohérent, et suff. verbal. ❖ 1 V. intr. Phys. Devenir cohérent (1.). || « Les molécules s ordonnent, se pressent, “cohèrent”… » (Année sc. et industr. 1898 [1897], p. 50). 2 V. tr. Rendre cohérent …   Encyclopédie Universelle

  • Coherer — Coherer, s. Kohärer …   Meyers Großes Konversations-Lexikon

  • Coherer — (engl., spr. hihrĕr), Kohärer, s. Telegraphie ohne Draht …   Kleines Konversations-Lexikon

  • Coherer — Metal filings coherer The coherer was a primitive form of radio signal detector used in the first radio receivers during the wireless telegraphy era at the beginning of the twentieth century. Invented around 1890 by French scientist Édouard… …   Wikipedia

  • coherer — kohereris statusas T sritis fizika atitikmenys: angl. coherer vok. Kohärer, m rus. когерер, m pranc. cohéreur, m …   Fizikos terminų žodynas

  • coherer — noun Date: 1894 a radio detector in which an imperfectly conducting contact between pieces of conductive material loosely resting against each other is materially improved in conductance by the passage of high frequency current …   New Collegiate Dictionary

  • coherer — /koh hear euhr, her /, n. 1. a person or thing that coheres. 2. Radio. a device usually used in detecting radio waves, as a tube filled with a conducting substance in granular form, whose electrical resistance increases when struck by radio waves …   Universalium

  • coherer — noun A detector of radio waves used in very early radio receivers …   Wiktionary

  • coherer — co·he·rer s.m.inv. ES ingl. {{wmetafile0}} TS elettr. dispositivo rivelatore di onde elettromagnetiche, usato nei primi apparecchi radiotelegrafici Sinonimi: coesore. {{line}} {{/line}} DATA: 1903. ETIMO: dal lat. cohaerĕre essere unito …   Dizionario italiano

  • coherer — co her·er || ɪərÉ™ n. radio wave detector (Radio); person or thing that coheres …   English contemporary dictionary

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