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1 Preece, Sir William Henry
[br]b. 15 February 1834 Bryn Helen, Gwynedd, Walesd. 6 November 1913 Penrhos, Gwynedd, Wales[br]Welsh electrical engineer who greatly furthered the development and use of wireless telegraphy and the telephone in Britain, dominating British Post Office engineering during the last two decades of the nineteenth century.[br]After education at King's College, London, in 1852 Preece entered the office of Edwin Clark with the intention of becoming a civil engineer, but graduate studies at the Royal Institution under Faraday fired his enthusiasm for things electrical. His earliest work, as connected with telegraphy and in particular its application for securing the safe working of railways; in 1853 he obtained an appointment with the Electric and National Telegraph Company. In 1856 he became Superintendent of that company's southern district, but four years later he moved to telegraph work with the London and South West Railway. From 1858 to 1862 he was also Engineer to the Channel Islands Telegraph Company. When the various telegraph companies in Britain were transferred to the State in 1870, Preece became a Divisional Engineer in the General Post Office (GPO). Promotion followed in 1877, when he was appointed Chief Electrician to the Post Office. One of the first specimens of Bell's telephone was brought to England by Preece and exhibited at the British Association meeting in 1877. From 1892 to 1899 he served as Engineer-in-Chief to the Post Office. During this time he made a number of important contributions to telegraphy, including the use of water as part of telegraph circuits across the Solent (1882) and the Bristol Channel (1888). He also discovered the existence of inductive effects between parallel wires, and with Fleming showed that a current (thermionic) flowed between the hot filament and a cold conductor in an incandescent lamp.Preece was distinguished by his administrative ability, some scientific insight, considerable engineering intuition and immense energy. He held erroneous views about telephone transmission and, not accepting the work of Oliver Heaviside, made many errors when planning trunk circuits. Prior to the successful use of Hertzian waves for wireless communication Preece carried out experiments, often on a large scale, in attempts at wireless communication by inductive methods. These became of historic interest only when the work of Maxwell and Hertz was developed by Guglielmo Marconi. It is to Preece that credit should be given for encouraging Marconi in 1896 and collaborating with him in his early experimental work on radio telegraphy.While still employed by the Post Office, Preece contributed to the development of numerous early public electricity schemes, acting as Consultant and often supervising their construction. At Worcester he was responsible for Britain's largest nineteenth-century public hydro-electric station. He received a knighthood on his retirement in 1899, after which he continued his consulting practice in association with his two sons and Major Philip Cardew. Preece contributed some 136 papers and printed lectures to scientific journals, ninety-nine during the period 1877 to 1894.[br]Principal Honours and DistinctionsCB 1894. Knighted (KCB) 1899. FRS 1881. President, Society of Telegraph Engineers, 1880. President, Institution of Electrical Engineers 1880, 1893. President, Institution of Civil Engineers 1898–9. Chairman, Royal Society of Arts 1901–2.BibliographyPreece produced numerous papers on telegraphy and telephony that were presented as Royal Institution Lectures (see Royal Institution Library of Science, 1974) or as British Association reports.1862–3, "Railway telegraphs and the application of electricity to the signaling and working of trains", Proceedings of the ICE 22:167–93.Eleven editions of Telegraphy (with J.Sivewright), London, 1870, were published by 1895.1883, "Molecular radiation in incandescent lamps", Proceedings of the Physical Society 5: 283.1885. "Molecular shadows in incandescent lamps". Proceedings of the Physical Society 7: 178.1886. "Electric induction between wires and wires", British Association Report. 1889, with J.Maier, The Telephone.1894, "Electric signalling without wires", RSA Journal.1898, "Aetheric telegraphy", Proceedings of the Institution of Electrical Engineers.Further ReadingJ.J.Fahie, 1899, History of Wireless Telegraphy 1838–1899, Edinburgh: Blackwood. E.Hawkes, 1927, Pioneers of Wireless, London: Methuen.E.C.Baker, 1976, Sir William Preece, F.R.S. Victorian Engineer Extraordinary, London (a detailed biography with an appended list of his patents, principal lectures and publications).D.G.Tucker, 1981–2, "Sir William Preece (1834–1913)", Transactions of the Newcomen Society 53:119–36 (a critical review with a summary of his consultancies).GW / KFBiographical history of technology > Preece, Sir William Henry
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2 prova di preece
"preece test;Preece-Test;ensaio de preece" -
3 jednostka rezystywności równa 10 omometrów
• preeceSłownik polsko-angielski dla inżynierów > jednostka rezystywności równa 10 omometrów
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4 badanie zanurzeniowe powłok cynkowych w roztworze siarczanu cynku
• Preece testSłownik polsko-angielski dla inżynierów > badanie zanurzeniowe powłok cynkowych w roztworze siarczanu cynku
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5 daldırma deneyi
Preece test -
6 проба Приса
Electrochemistry: Preece test (определение однородности и толщины цинкового покрытия погружение в 1,27 / M p-p CuSO4 при 18[deg] на 1 мин) -
7 Cardew, Philip
[br]b. 24 September 1851 Leatherhead, Surrey, Englandd. 17 May 1910 Godalming, Surrey, England[br]English electrical engineer and inventory adviser to the Board of Trade.[br]After education at the Royal Military Academy in Woolwich, Cardew was placed in charge of Bermudan military telegraphs in 1876. In 1889 he was appointed the first Electrical Adviser to the Board of Trade, where he formulated valuable regulations for the safety and control of public electricity supplies. In 1883 Cardew invented the thermogalvanometer, a hot-wire measuring instrument, that became widely used as a voltmeter but was obsolete by 1907. The device depended for its action on the heating and subsequent elongation of a platinum wire and could be used on alternating currents of high frequency. Retiring from the Board of Trade in 1899, Cardew joined a partnership of consulting engineers with Sir William Preece and his son. Taking a particular interest in railway electrification, he became a director of the London Brighton \& South Coast Railway.[br]Principal Honours and DistinctionsInventions Exhibition Gold Medal 1885.Bibliography1881, Journal of the Society of Telegraph Engineers 10:111–14 (describes the application of electricity to railways).5 February 1883, British patent no. 623 (Cardew's hot-wire instrument).1898, Journal of the Institution of Electrical Engineers 19:425–47 (his account of Board of Trade legislation).Further ReadingJ.T.Stock and D.Vaughan, 1983, The Development of Instruments to Measure Electric Current, London: Science Museum (for instrument origins).Dictionary of National Biographyr, 1912, Vol. I, Suppl. 2, pp. 313–14.GW -
8 Electronics and information technology
See also: INDEX BY SUBJECT AREA[br]Byron, Ada AugustaNapier, JohnRiche, Gaspard-Clair-François-MarieSchickhard, WilhelmBiographical history of technology > Electronics and information technology
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9 Kapp, Gisbert Johann Eduard Karl
SUBJECT AREA: Electricity[br]b. 2 September 1852 Mauer, Vienna, Austriad. 10 August 1922 Birmingham, England[br]Austrian (naturalized British in 1881) engineer and a pioneer of dynamo design, being particularly associated with the concept of the magnetic circuit.[br]Kapp entered the Polytechnic School in Zurich in 1869 and gained a mechanical engineering diploma. He became a member of the engineering staff at the Vienna International Exhibition of 1873, and then spent some time in the Austrian navy before entering the service of Gwynne \& Co. of London, where he designed centrifugal pumps and gas exhausters. Kapp resolved to become an electrical engineer after a visit to the Paris Electrical Exhibition of 1881 and in the following year was appointed Manager of the Crompton Co. works at Chelmsford. There he developed and patented the dynamo with compound field winding. Also at that time, with Crompton, he patented electrical measuring instruments with over-saturated electromagnets. He became a naturalized British subject in 1881.In 1886 Kapp's most influential paper was published. This described his concept of the magnetic circuit, providing for the first time a sound theoretical basis for dynamo design. The theory was also developed independently by J. Hopkinson. After commencing practice as a consulting engineer in 1884 he carried out design work on dynamos and also electricity-supply and -traction schemes in Germany, Italy, Norway, Russia and Switzerland. From 1891 to 1894 much of his time was spent designing a new generating station in Bristol, officially as Assistant to W.H. Preece. There followed an appointment in Germany as General Secretary of the Verband Deutscher Electrotechniker. For some years he edited the Electrotechnische Zeitschrift and was also a part-time lecturer at the Charlottenberg Technical High School in Berlin. In 1904 Kapp was invited to accept the new Chair of Electrical Engineering at the University of Birmingham, which he occupied until 1919. He was the author of several books on electrical machine and transformer design.[br]Principal Honours and DistinctionsInstitution of Civil Engineers Telford Medal 1886 and 1888. President, Institution of Electrical Engineers 1909.Bibliography10 October 1882, with R.E.B.Crompton, British patent no. 4,810; (the compound wound dynamo).1886, "Modern continuous current dynamo electric machines and their engines", Proceedings of the Institution of Civil Engineers 83: 123–54.Further ReadingD.G.Tucker, 1989, "A new archive of Gisbert Kapp papers", Proceedings of the Meeting on History of Electrical Engineering, IEE 4/1–4/11 (a transcript of an autobiography for his family).D.G.Tucker, 1973, Gisbert Kapp 1852–1922, Birmingham: Birmingham University (includes a bibliography of his most important publications).GWBiographical history of technology > Kapp, Gisbert Johann Eduard Karl
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10 Public utilities
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11 Telecommunications
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Preece — is a surname and may refer to:* Andy Preece * David Preece * David Preece (footballer b. 1963) * Jenny Preece * Rob Preece * Steve Preece * Tim Preece * Warren E. Preece * William Henry Preeceee also* Price * Pryce * ap Rees … Wikipedia
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