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1 Sheffield plate
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2 Sheffield-plate
subst. \/ˈʃefiːld ˌpleɪt\/Sheffield-plett, ekte plett -
3 Sheffield plate
• листовой материал с латунной основой, плакированный серебром• листовой материал с медной основой, плакированный серебром -
4 Sheffield plate
1) Архитектура: вид дешёвого серебра (тонкий лист меди, закатанный между двумя листами серебра)2) Металлургия: листовой материал с латунной основой, плакированный серебром, листовой материал с медной основой, плакированный серебром3) Электрохимия: листовая медь, плакированная серебром -
5 Sheffield plate
warstwa srebra na metalu platerowanym -
6 Sheffield plate
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7 Sheffield
Sheffield[´ʃefi:ld] n Шефилд; \Sheffield plate ист. посребрена мед; посребрени предмети (прибори); \Sheffield ware ножове и пр. -
8 Boulsover, Thomas
[br]b. 1704d. 1788[br]English cutler, metalworker and inventor of Sheffield plate.[br]Boulsover, originally a small-scale manufacturer of cutlery, is believed to have specialized in making knife-handle components. About 1742 he found that a thin sheet of silver could be fused to copper sheet by rolling or beating to flatten it. Thus he developed the plating of silver, later called Sheffield plate.The method when perfected consisted of copper sheet overlaid by thin sheet silver being annealed by red heat. Protected by iron sheeting, the copper and silver were rolled together, becoming fused to a single plate capable of undergoing further manufacturing processes. Later developments included methods of edging the fused sheets and the placing of silver sheet on both lower and upper surfaces of copper, to produce high-quality silver plate, in much demand by the latter part of the century. Boulsover himself is said to have produced only small articles such as buttons and snuff boxes from this material, which by 1758 was being exploited more commercially by Joseph Hancock in Sheffield making candlesticks, hot-water pots and coffee pots. Matthew Boulton introduced its manufacture in very high-quality products during the 1760s to Birmingham, where the technique was widely adopted later. By the 1770s Boulsover was engaged in rolling his plated copper for industry elsewhere, also trading in iron and purchasing blister steel which he converted by the Huntsman process to crucible steel. Blister steel was converted on his behalf to shear steel by forging. He is thought to have also been responsible for improving this product further, introducing "double-shear steel", by repeating the forging and faggoting of shear steel bars. Thomas Boulsover had become a Sheffield entrepreneur, well known for his numerous skills with metals.[br]Further ReadingH.W.Dickinson, 1937, Matthew Boulton, Cambridge: Cambridge University Press (describes Boulsover's innovation and further development of Sheffield plate).J.Holland, 1834, Manufactures in Metal III, 354–8.For activities in steel see: K.C.Barraclough, 1991, "Steel in the Industrial Revolution", in J.Day and R.F.Tylecote (eds), The Industrial Revolution in Metals, The Institute of Metals.JD -
9 Fox, Samuel
SUBJECT AREA: Domestic appliances and interiors[br]b. 1815 Bradfield, near Sheffield, Englandd. February 1887 Sheffield, England[br]English inventor of the curved steel umbrella frame.[br]Samuel Fox was the son of a weaver's shuttle maker in the hamlet of Bradwell (probably Bradfield, near Sheffield) in the remote hills. He went to Sheffield and served an apprenticeship in the steel trade. Afterwards, he worked with great energy and industry until he acquired sufficient capital to start in business on his own account at Stocksbridge, near Sheffield. It was there that he invented what became known as "Fox's Paragon Frame" for umbrellas. Whalebone or solid steel had previously been used for umbrella ribs, but whalebone was unreliable and steel was heavy. Fox realized that if he grooved the ribs he could make them both lighter and more elastic. In his first patent, taken out in 1852, he described making the ribs and stretchers of parasols and umbrellas from a narrow strip of steel plate partially bent into a trough-like form. He took out five more patents. The first, in 1853, was for strengthening the joints. His next two, in 1856 and 1857, were more concerned with preparing the steel for making the ribs. Another patent in 1857 was basically for improving the formation of the bit at the end of the rib where it was fixed to the stretcher and where the end of the rib has to be formed into a boss: this was so it could have a pin fixed through it to act as a pivot when the umbrella has to be opened or folded and yet support the rib and stretcher. The final patent, in 1865, reverted once more to improving the manufacture of the ribs. He made a fortune before other manufacturers knew what he was doing. Fox established a works at Lille when he found that the French import duties and other fiscal arrangements hindered exporting umbrellas and successful trading there, and was thereby able to develop a large and lucrative business.[br]Bibliography1852. British patent no. 14,055 (curved steel ribs and stretchers for umbrellas). 1853. British patent no. 739 (strengthened umbrella joints).1856. British patent no. 2,741 (ribs and stretchers for umbrellas). 1857. British patent no. 1,450 (steel wire for umbrellas).1857, British patent no. 1,857 (forming the bit attached to the ribs). 1865, British patent no. 2,348 (improvements in making the ribs).Further ReadingObituary, 1887, Engineer 63.Obituary, 1887, Iron 29.RLH -
10 Curr, John
[br]b. 1756 Kyo, near Lanchester, or in Greenside, near Ryton-on-Tyne, Durham, Englandd. 27 January 1823 Sheffield, England[br]English coal-mine manager and engineer, inventor of flanged, cast-iron plate rails.[br]The son of a "coal viewer", Curr was brought up in the West Durham colliery district. In 1777 he went to the Duke of Norfolk's collieries at Sheffield, where in 1880 he was appointed Superintendent. There coal was conveyed underground in baskets on sledges: Curr replaced the wicker sledges with wheeled corves, i.e. small four-wheeled wooden wagons, running on "rail-roads" with cast-iron rails and hauled from the coal-face to the shaft bottom by horses. The rails employed hitherto had usually consisted of plates of iron, the flange being on the wheels of the wagon. Curr's new design involved flanges on the rails which guided the vehicles, the wheels of which were unflanged and could run on any hard surface. He appears to have left no precise record of the date that he did this, and surviving records have been interpreted as implying various dates between 1776 and 1787. In 1787 John Buddle paid tribute to the efficiency of the rails of Curr's type, which were first used for surface transport by Joseph Butler in 1788 at his iron furnace at Wingerworth near Chesterfield: their use was then promoted widely by Benjamin Outram, and they were adopted in many other English mines. They proved serviceable until the advent of locomotives demanded different rails.In 1788 Curr also developed a system for drawing a full corve up a mine shaft while lowering an empty one, with guides to separate them. At the surface the corves were automatically emptied by tipplers. Four years later he was awarded a patent for using double ropes for lifting heavier loads. As the weight of the rope itself became a considerable problem with the increasing depth of the shafts, Curr invented the flat hemp rope, patented in 1798, which consisted of several small round ropes stitched together and lapped upon itself in winding. It acted as a counterbalance and led to a reduction in the time and cost of hoisting: at the beginning of a run the loaded rope began to coil upon a small diameter, gradually increasing, while the unloaded rope began to coil off a large diameter, gradually decreasing.Curr's book The Coal Viewer (1797) is the earliest-known engineering work on railway track and it also contains the most elaborate description of a Newcomen pumping engine, at the highest state of its development. He became an acknowledged expert on construction of Newcomen-type atmospheric engines, and in 1792 he established a foundry to make parts for railways and engines.Because of the poor financial results of the Duke of Norfolk's collieries at the end of the century, Curr was dismissed in 1801 despite numerous inventions and improvements which he had introduced. After his dismissal, six more of his patents were concerned with rope-making: the one he gained in 1813 referred to the application of flat ropes to horse-gins and perpendicular drum-shafts of steam engines. Curr also introduced the use of inclined planes, where a descending train of full corves pulled up an empty one, and he was one of the pioneers employing fixed steam engines for hauling. He may have resided in France for some time before his death.[br]Bibliography1788. British patent no. 1,660 (guides in mine shafts).1789. An Account of tin Improved Method of Drawing Coals and Extracting Ores, etc., from Mines, Newcastle upon Tyne.1797. The Coal Viewer and Engine Builder's Practical Companion; reprinted with five plates and an introduction by Charles E.Lee, 1970, London: Frank Cass, and New York: Augustus M.Kelley.1798. British patent no. 2,270 (flat hemp ropes).Further ReadingF.Bland, 1930–1, "John Curr, originator of iron tram roads", Transactions of the Newcomen Society 11:121–30.R.A.Mott, 1969, Tramroads of the eighteenth century and their originator: John Curr', Transactions of the Newcomen Society 42:1–23 (includes corrections to Fred Bland's earlier paper).Charles E.Lee, 1970, introduction to John Curr, The Coal Viewer and Engine Builder's Practical Companion, London: Frank Cass, pp. 1–4; orig. pub. 1797, Sheffield (contains the most comprehensive biographical information).R.Galloway, 1898, Annals of Coalmining, Vol. I, London; reprinted 1971, London (provides a detailed account of Curr's technological alterations).WK / PJGR -
11 Carbutt, John
SUBJECT AREA: Photography, film and optics[br]b. 1832 Sheffield, Englandd. 1905 Philadelphia, Pennsylvania, USA[br]Anglo-American photographer and photographic manufacturer.[br]Carbutt emigrated in 1853 from England to the United States, where he remained for the rest of his life. He began working as a photographer in Chicago, where he soon earned a considerable reputation and became the official photographer for the Canadian Pacific Railway. In 1870 he purchased the American rights of Woodbury's photomechanical printing process and established a business to produce Woodburytypes in Philadelphia. In 1879 Carbutt set up the first successful gelatine halide dry-plate factory in America. A year later he was elected first President of the Photographers' Association of America. He began experimenting with flexible film supports in 1884 and was the first to produce satisfactory flat films on celluloid commercially. The first kinetoscope film strips used by Thomas Edison were supplied by Carbutt. Carbutt's celluloid films were exported to Europe, where nothing comparable was available at the time. He was also a pioneer manufacturer of orthochromatic plates, X-ray plates and photographic colour filters.[br]Further ReadingObituary, 1905, Journal of the Franklin Institute: 461–3. L.W.Shipley, 1965, Photography's Great Inventors, Philadelphia.G.Hendricks, 1961, The Edison Motion Picture Myth (makes reference to aspects of Carbutt's work on celluloid).JW
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