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German Association for Electrical

  • 1 Немецкая ассоциация по электрическим, электронным и информационным технологиям

    Универсальный русско-английский словарь > Немецкая ассоциация по электрическим, электронным и информационным технологиям

  • 2 Weber, Wilhelm Eduard

    SUBJECT AREA: Electricity
    [br]
    b. 24 October 1804 Wittenberg, Germany
    d. 23 June 1891 Göttingen, Germany
    [br]
    German physicist, the founder of precise measurement of electrical quantities.
    [br]
    Weber began scientific experiments at an early age and entered the University of Halle, where he came under the influence of J.S.C.Schweigger, inventor of the galvanometer. Completing his education with a dissertation on the theory of organ pipes and making important contributions to the science of acoustics, he was awarded a lectureship and later an assistant professorship at Halle. Weber was offered the Chair of Physics at Göttingen in 1831 and jointly with Gauss began investigations into the precision measurement of magnetic quantities. In 1841 he invented the electrodynamometer type of electrical measuring instrument. This was a development of the galvanometer in which, instead of a needle, a small coil was suspended within an outer coil. A current flowing through both coils tended to turn the inner coil, the sine of the angle through which the suspending wires were twisted being proportional to the square of the strength of the current. A variation of the electrodynamometer was capable of measuring directly the power in electrical circuits.
    The introduction by Weber of a system of absolute units for the measurement of electrical quantities was a most important step in electrical science. He had a considerable influence on the British Association committees on electrical standards organized in 1861 to promote a coherent system of electrical units. Weber's ideas also led him to define elementary electric particles, ascribing mass and charge to them. His name was used for a time before 1883 as the unit of electric current, until the name "ampere" was proposed by Helmholtz. Since 1948 the term "weber" has been used for the SI unit of magnetic flux.
    [br]
    Principal Honours and Distinctions
    FRS 1850. Royal Society Copley Medal 1859.
    Bibliography
    1892–4, William Weber's Werke, 6 vols, Berlin.
    Further Reading
    P.Lenard, 1954, Great Men of Science, London, pp. 263–70 (a reliable, short biography). C.C.Gillispie (ed.), 1976, Dictionary of Scientific Biography, Vol. XIV, New York, pp.
    203–9 (discusses his theoretical contributions).
    S.P.Bordeau, 1982, Volts to Herz, Minneapolis, pp. 172 and 181 (discusses Weber's influence on contemporary scientists).
    GW

    Biographical history of technology > Weber, Wilhelm Eduard

  • 3 Bosch, Robert August

    [br]
    b. 23 September 1861 Albeck, near Ulm, Germany
    d. 9 March 1942 Stuttgart, Germany
    [br]
    German engineer, industrialist and pioneer of internal combustion engine electrical systems.
    [br]
    Robert was the eighth of twelve children of the landlord of a hotel in the village of Albeck. He wanted to be a botanist and zoologist, but at the age of 18 he was apprenticed as a precision mechanic. He travelled widely in the south of Germany, which is unusual for an apprenticeship. In 1884, he went to the USA, where he found employment with Thomas A. Edison and his colleague, the German electrical engineer Siegmund Bergmann. During this period he became interested and involved in the rights of workers.
    In 1886 he set up his own workshop in Stuttgart, having spent a short time with Siemens in England. He built up a sound reputation for quality, but the firm outgrew its capital and in 1892 he had to sack nearly all his employees. Fortunately, among the few that he was able to retain were Arnold Zähringer, who later became Manager, and an apprentice, Gottlieb Harold. These two, under Bosch, were responsible for the development of the low-tension (1897) and the high-tension (1902) magneto. They also developed the Bosch sparking plug, again in 1902. The distributor for multi-cylinder engines followed in 1910. These developments, with a strong automotive bias, were stimulated by Bosch's association with Frederick Simms, an Englishman domiciled in Hamburg, who had become a director of Daimler in Canstatt and had secured the UK patent rights of the Daimler engine. Simms went on to invent, in about 1898, a means of varying ignition timing with low-tension magnetos.
    It must be emphasized, as pointed out above, that the invention of neither type of magneto was due to Bosch. Nikolaus Otto introduced a crude low-tension magneto in 1884, but it was not patented in Germany, while the high-tension magneto was invented by Paul Winand, a nephew of Otto's partner Eugen Langen, in 1887, this patent being allowed to lapse in 1890.
    Bosch's social views were advanced for his time. He introduced an eight-hour day in 1906 and advocated industrial arbitration and free trade, and in 1932 he wrote a book on the prevention of world economic crises, Die Verhütung künftiger Krisen in der Weltwirtschaft. Other industrialists called him the "Red Bosch" because of his short hours and high wages; he is reputed to have replied, "I do not pay good wages because I have a lot of money, I have a lot of money because I pay good wages." The firm exists to this day as the giant multi-national company Robert Bosch GmbH, with headquarters still in Stuttgart.
    [br]
    Further Reading
    T.Heuss, 1994, Robert Bosch: His Life and Achievements (trans. S.Gillespie and J. Kapczynski), New York: Henry Holt \& Co.
    JB

    Biographical history of technology > Bosch, Robert August

  • 4 Siemens, Sir Charles William

    [br]
    b. 4 April 1823 Lenthe, Germany
    d. 19 November 1883 London, England
    [br]
    German/British metallurgist and inventory pioneer of the regenerative principle and open-hearth steelmaking.
    [br]
    Born Carl Wilhelm, he attended craft schools in Lübeck and Magdeburg, followed by an intensive course in natural science at Göttingen as a pupil of Weber. At the age of 19 Siemens travelled to England and sold an electroplating process developed by his brother Werner Siemens to Richard Elkington, who was already established in the plating business. From 1843 to 1844 he obtained practical experience in the Magdeburg works of Count Stolburg. He settled in England in 1844 and later assumed British nationality, but maintained close contact with his brother Werner, who in 1847 had co-founded the firm Siemens \& Halske in Berlin to manufacture telegraphic equipment. William began to develop his regenerative principle of waste-heat recovery and in 1856 his brother Frederick (1826–1904) took out a British patent for heat regeneration, by which hot waste gases were passed through a honeycomb of fire-bricks. When they became hot, the gases were switched to a second mass of fire-bricks and incoming air and fuel gas were led through the hot bricks. By alternating the two gas flows, high temperatures could be reached and considerable fuel economies achieved. By 1861 the two brothers had incorporated producer gas fuel, made by gasifying low-grade coal.
    Heat regeneration was first applied in ironmaking by Cowper in 1857 for heating the air blast in blast furnaces. The first regenerative furnace was set up in Birmingham in 1860 for glassmaking. The first such furnace for making steel was developed in France by Pierre Martin and his father, Emile, in 1863. Siemens found British steelmakers reluctant to adopt the principle so in 1866 he rented a small works in Birmingham to develop his open-hearth steelmaking furnace, which he patented the following year. The process gradually made headway; as well as achieving high temperatures and saving fuel, it was slower than Bessemer's process, permitting greater control over the content of the steel. By 1900 the tonnage of open-hearth steel exceeded that produced by the Bessemer process.
    In 1872 Siemens played a major part in founding the Society of Telegraph Engineers (from which the Institution of Electrical Engineers evolved), serving as its first President. He became President for the second time in 1878. He built a cable works at Charlton, London, where the cable could be loaded directly into the holds of ships moored on the Thames. In 1873, together with William Froude, a British shipbuilder, he designed the Faraday, the first specialized vessel for Atlantic cable laying. The successful laying of a cable from Europe to the United States was completed in 1875, and a further five transatlantic cables were laid by the Faraday over the following decade.
    The Siemens factory in Charlton also supplied equipment for some of the earliest electric-lighting installations in London, including the British Museum in 1879 and the Savoy Theatre in 1882, the first theatre in Britain to be fully illuminated by electricity. The pioneer electric-tramway system of 1883 at Portrush, Northern Ireland, was an opportunity for the Siemens company to demonstrate its equipment.
    [br]
    Principal Honours and Distinctions
    Knighted 1883. FRS 1862. Institution of Civil Engineers Telford Medal 1853. President, Institution of Mechanical Engineers 1872. President, Society of Telegraph Engineers 1872 and 1878. President, British Association 1882.
    Bibliography
    27 May 1879, British patent no. 2,110 (electricarc furnace).
    1889, The Scientific Works of C.William Siemens, ed. E.F.Bamber, 3 vols, London.
    Further Reading
    W.Poles, 1888, Life of Sir William Siemens, London; repub. 1986 (compiled from material supplied by the family).
    S.von Weiher, 1972–3, "The Siemens brothers. Pioneers of the electrical age in Europe", Transactions of the Newcomen Society 45:1–11 (a short, authoritative biography). S.von Weihr and H.Goetler, 1983, The Siemens Company. Its Historical Role in the
    Progress of Electrical Engineering 1847–1980, English edn, Berlin (a scholarly account with emphasis on technology).
    GW

    Biographical history of technology > Siemens, Sir Charles William

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