ignitron

/ig nuy"tron, ig"ni tron/, n. Electronics.
a cathode-arc vacuum tube with an auxiliary electrode projecting into a pool of mercury: it conducts current when the anode is positive.
[1930-35; IGNI(TER) + -TRON]

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       electron tube functioning as a rectifier to convert alternating current (AC) to direct current (DC). Each conduction cycle is started by an external voltage applied to the igniter, a small electrode touching the tube's cathode, which is a pool of mercury. Electrons (electron) released by the igniter from the surface of the mercury initiate a conducting arc through the tube. The arc lasts until voltage on the ignitron's plate has been reduced to the point that the arc can no longer be sustained.

      Large ignitron devices may be built inside vacuum tanks instead of tube envelopes. Ignitrons are very limited with respect to their physical orientation. Because of the pool of mercury, the device cannot lean more than two or three degrees from the vertical. Ignitrons are used where power control of high voltages or currents is required. Electrical welding equipment incorporating an ignitron as a heavy-duty relay is probably the most common application.

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Universalium. 2010.

Look at other dictionaries:

  • ignitron — IGNITRÓN, ignitroane, s.n. (elt.) Tub redresor cu un singur anod, cu descărcare în vapori de mercur şi cu un electrod auxiliar de aprindere; excitron. – Din engl., fr. ignitron. Trimis de gall, 13.09.2007. Sursa: DEX 98  IGNITRÓN s.… …   Dicționar Român

  • ignitron — ● ignitron nom masculin (anglais ignitron, de électron) Tube redresseur à gaz, dont la cathode est constituée par du mercure liquide et dans lequel l amorçage est renouvelé à chaque période grâce à une électrode spéciale. ignitron n. m. ELECTRON… …   Encyclopédie Universelle

  • ignitron — [ig nī′trän΄] n. [ IGNI(TE) + (ELEC)TRON] a type of mercury arc rectifier tube having a mercury pool cathode and a single graphite anode: when a current is passed through an igniter rod into the pool, the mercury vapor is ionized and an arc… …   English World dictionary

  • Ignitron — (1) Anode, (2) Kathode, (3) Zündelektrode (Ignitor), (4) Quecksilbersee, (5) Keramischer Isolator, (6) Kühlflüssigkeit …   Deutsch Wikipedia

  • Ignitron — An ignitron is a type of controlled rectifier dating from the 1930s. Invented by Joseph Slepian while employed by Westinghouse, Westinghouse was the original manufacturer and owned trademark rights to the name Ignitron . It is usually a large… …   Wikipedia

  • Ignitrón — (1) Anodo, (2) Cátodo, (3) Ignitor, (4) Mercurio, (5) Aislante cerámico, (6) Fluido refrigerante. Un ignitrón es un tipo de rectificador controlado que data de la década de 1930. Fue inventado por Joseph Slepian mientras trabajaba para… …   Wikipedia Español

  • Ignitron — ignitronas statusas T sritis fizika atitikmenys: angl. ignitron vok. Ignitron, n rus. игнитрон, m pranc. ignitron, m …   Fizikos terminų žodynas

  • Ignitron — (1) Anode, (2) Cathode, (3) Igniter, (4) Mercure, (5) Isolateur céramique, (6) Fluide de réfrigération Un ignitron est un dispositif électronique utilisé pour redresser le courant alternatif. Il a été inventé en 1930 par Joseph Slepian  …   Wikipédia en Français

  • Ignitron — Ịg|ni|tron auch: Ịg|nit|ron 〈n. 11; Phys.〉 Gasentladungsröhre mit einer über eine Hilfselektrode steuerbaren Zündung mit ähnlichen Eigenschaften wie ein Relais, wird zur Steuerung hoher Ströme u. Leistungen eingesetzt [zu lat. ignis „Feuer“] *… …   Universal-Lexikon

  • ignitron — noun Etymology: Latin ignis fire + English tron Date: 1933 a mercury containing rectifier tube in which the arc is struck again at the beginning of each cycle by a special electrode separately energized by an auxiliary circuit …   New Collegiate Dictionary

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