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aberdonian

  • 21 Aberdonian

    adj.
    de Aberdeen.
    s.
    habitante de Aberdeen.

    Nuevo Diccionario Inglés-Español > Aberdonian

  • 22 aberdonian

    English-Russian smart dictionary > aberdonian

  • 23 Aberdonian

    n абердинец

    English-Russian base dictionary > Aberdonian

  • 24 Aberdonian Ab·er·do·nian

    [ˌæbə'dəʊnɪən]
    1. adj
    2. n
    abitante m/f or originario (-a) di Aberdeen

    English-Italian dictionary > Aberdonian Ab·er·do·nian

  • 25 Davidson, Robert

    [br]
    b. 18 April 1804 Aberdeen, Scotland
    d. 16 November 1894 Aberdeen, Scotland
    [br]
    Scottish chemist, pioneer of electric power and builder of the first electric railway locomotives.
    [br]
    Davidson, son of an Aberdeen merchant, attended Marischal College, Aberdeen, between 1819 and 1822: his studies included mathematics, mechanics and chemistry. He subsequently joined his father's grocery business, which from time to time received enquiries for yeast: to meet these, Davidson began to manufacture yeast for sale and from that start built up a successful chemical manufacturing business with the emphasis on yeast and dyes. About 1837 he started to experiment first with electric batteries and then with motors. He invented a form of electromagnetic engine in which soft iron bars arranged on the periphery of a wooden cylinder, parallel to its axis, around which the cylinder could rotate, were attracted by fixed electromagnets. These were energized in turn by current controlled by a simple commutaring device. Electric current was produced by his batteries. His activities were brought to the attention of Michael Faraday and to the scientific world in general by a letter from Professor Forbes of King's College, Aberdeen. Davidson declined to patent his inventions, believing that all should be able freely to draw advantage from them, and in order to afford an opportunity for all interested parties to inspect them an exhibition was held at 36 Union Street, Aberdeen, in October 1840 to demonstrate his "apparatus actuated by electro-magnetic power". It included: a model locomotive carriage, large enough to carry two people, that ran on a railway; a turning lathe with tools for visitors to use; and a small printing machine. In the spring of 1842 he put on a similar exhibition in Edinburgh, this time including a sawmill. Davidson sought support from railway companies for further experiments and the construction of an electromagnetic locomotive; the Edinburgh exhibition successfully attracted the attention of the proprietors of the Edinburgh 585\& Glasgow Railway (E \& GR), whose line had been opened in February 1842. Davidson built a full-size locomotive incorporating his principle, apparently at the expense of the railway company. The locomotive weighed 7 tons: each of its two axles carried a cylinder upon which were fastened three iron bars, and four electromagnets were arranged in pairs on each side of the cylinders. The motors he used were reluctance motors, the power source being zinc-iron batteries. It was named Galvani and was demonstrated on the E \& GR that autumn, when it achieved a speed of 4 mph (6.4 km/h) while hauling a load of 6 tons over a distance of 1 1/2 miles (2.4 km); it was the first electric locomotive. Nevertheless, further support from the railway company was not forthcoming, although to some railway workers the locomotive seems to have appeared promising enough: they destroyed it in Luddite reaction. Davidson staged a further exhibition in London in 1843 without result and then, the cost of battery chemicals being high, ceased further experiments of this type. He survived long enough to see the electric railway become truly practicable in the 1880s.
    [br]
    Bibliography
    1840, letter, Mechanics Magazine, 33:53–5 (comparing his machine with that of William Hannis Taylor (2 November 1839, British patent no. 8,255)).
    Further Reading
    1891, Electrical World, 17:454.
    J.H.R.Body, 1935, "A note on electro-magnetic engines", Transactions of the Newcomen Society 14:104 (describes Davidson's locomotive).
    F.J.G.Haut, 1956, "The early history of the electric locomotive", Transactions of the Newcomen Society 27 (describes Davidson's locomotive).
    A.F.Anderson, 1974, "Unusual electric machines", Electronics \& Power 14 (November) (biographical information).
    —1975, "Robert Davidson. Father of the electric locomotive", Proceedings of the Meeting on the History of Electrical Engineering Institution of Electrical Engineers, 8/1–8/17 (the most comprehensive account of Davidson's work).
    A.C.Davidson, 1976, "Ingenious Aberdonian", Scots Magazine (January) (details of his life).
    PJGR / GW

    Biographical history of technology > Davidson, Robert

См. также в других словарях:

  • Aberdonian — ► ADJECTIVE ▪ relating to Aberdeen. ► NOUN ▪ a person from Aberdeen. ORIGIN from Latin Aberdonia …   English terms dictionary

  • Aberdonian — UK [ˌæbə(r)ˈdəʊnɪən] / US [ˌæbərˈdoʊnɪən] noun [countable] Word forms Aberdonian : singular Aberdonian plural Aberdonians someone who comes from the city of Aberdeen Derived word: Aberdonian UK / US adjective …   English dictionary

  • Aberdonian — n a person from Aberdeen. ► Aberdonian adj of or from Aberdeen. * * * …   Universalium

  • Aberdonian — adjective or noun see Aberdeen …   New Collegiate Dictionary

  • Aberdonian — 1. adjective Of or relating to Aberdeen. 2. noun A citizen or inhabitant of, or person born in, Aberdeen, NE Scotland …   Wiktionary

  • Aberdonian — Ab·er·don·i·an || ‚æbÉ™(r) dəʊnɪən adj. of or pertaining to Aberdeen n. native or resident of Aberdeen …   English contemporary dictionary

  • Aberdonian — [ˌabə dəʊnɪən] adjective relating to Aberdeen in NE Scotland. noun a native or citizen of Aberdeen. Origin C17: from med. L. Aberdonia …   English new terms dictionary

  • aberdonian — ab·er·do·ni·an …   English syllables

  • Aberdonian — adj. & n. adj. of Aberdeen. n. a native or citizen of Aberdeen. Etymology: med.L Aberdonia …   Useful english dictionary

  • Aberdeen — Aberdonian /ab euhr doh nee euhn/, adj., n. /ab euhr deen / for 1, 2; /ab euhr deen / for 3 6, n. 1. Also called Aberdeenshire /ab euhr deen shear, sheuhr/. a historic county in NE Scotland. 2. a seaport in NE Scotland, on the North Sea:… …   Universalium

  • List of named passenger trains of the United Kingdom — This article contains a list of named passenger trains in the United Kingdom. These are specific regular journeys identified by a special name in the timetable, not to be confused with the names of engines or individual physical train rakes. One… …   Wikipedia

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