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1 manufacture d'articles en métal
Dictionnaire polytechnique Français-Russe > manufacture d'articles en métal
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2 manufacture
fфабрика; завод- manufacture de coton
- manufacture de porcelaine
- manufacture de tapis
- manufacture de tissage -
3 Polhem, Christopher
SUBJECT AREA: Mining and extraction technology[br]b. 18 December 1661 Tingstade, Gotland, Sweden d. 1751[br]Swedish engineer and inventor.[br]He was the eldest son of Wolf Christopher Polhamma, a merchant. The father died in 1669 and the son was sent by his stepfather to an uncle in Stockholm who found him a place in the Deutsche Rechenschule. After the death of his uncle, he was forced to find employment, which he did with the Biorenklou family near Uppsala where he eventually became a kind of estate bailiff. It was during this period that he started to work with a lathe, a forge and at carpentry, displaying great technical ability. He realized that without further education he had little chance of making anything of his life, and accordingly, in 1687, he registered at the University of Uppsala where he studied astronomy and mathematics, remaining there for three years. He also repaired two astronomical pendulum clocks as well as the decrepit medieval clock in the cathedral. After a year's work he had this clock running properly: this was his breakthrough. He was summoned to Stockholm where the King awarded him a salary of 500 dalers a year as an encouragement to further efforts. Around this time, one of increasing mechanization and when mining was Sweden's principal industry, Pohlem made a model of a hoist frame for mines and the Mines Authority encouraged him to develop his ideas. In 1693 Polhem completed the Blankstot hoist at the Stora Kopparberg mine, which attracted great interest on the European continent.From 1694 to 1696 Polhem toured factories, mills and mines abroad in Germany, Holland, England and France, studying machinery of all kinds and meeting many foreign engineers. In 1698 he was appointed Director of Mining Engineering in Sweden, and in 1700 he became Master of Construction in the Falu Mine. He installed the Karl XII hoist there, powered by moving beams from a distant water-wheel. His plan of 1697 for all the machinery at the Falu mine to be driven by three large and remote water-wheels was never completed.In 1707 he was invited by the Elector of Hanover to visit the mines in the Harz district, where he successfully explained many of his ideas which were adopted by the local engineers. In 1700, in conjunction with Gabriel Stierncrona, he founded the Stiersunds Bruk at Husby in Southern Dalarna, a factory for the mass production of metal goods in iron, steel and bronze. Simple articles such as pans, trays, bowls, knives, scissors and mirrors were made there, together with the more sophisticated Polhem lock and the Stiersunds clock. Production was based on water power. Gear cutting for the clocks, shaping hammers for plates, file cutting and many other operations were all water powered, as was a roller mill for the sheet metal used in the factory. He also designed textile machinery such as stocking looms and spinning frames and machines for the manufacture of ribbons and other things.In many of his ideas Polhem was in advance of his time and Swedish country society was unable to absorb them. This was largely the reason for the Stiersund project being only a partial success. Polhem, too, was of a disputatious nature, self-opinionated almost to the point of conceit. He was a prolific writer, leaving over 20,000 pages of manuscript notes, drafts, essays on a wide range of subjects, which included building, brick-making, barrels, wheel-making, bell-casting, organ-building, methods of stopping a horse from bolting and a curious tap "to prevent serving maids from sneaking wine from the cask", the construction of ploughs and threshing machines. His major work, Kort Berattelse om de Fornamsta Mechaniska Inventioner (A Brief Account of the Most Famous Inventions), was printed in 1729 and is the main source of knowledge about his technological work. He is also known for his "mechanical alphabet", a collection of some eighty wooden models of mechanisms for educational purposes. It is in the National Museum of Science and Technology in Stockholm.[br]Bibliography1729, Kort Berattelse om de Fornamsta Mechaniska Inventioner (A Brief Account of the Most Famous Inventions).Further Reading1985, Christopher Polhem, 1661–1751, TheSwedish Daedalus' (catalogue of a travelling exhibition from the Swedish Institute in association with the National Museum of Science and Technology), Stockholm.IMcN -
4 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 -
5 Hyatt, John Wesley
[br]b. 28 November 1837 Starkey, New York, USAd. 10 May 1920 Short Hills, New Jersey, USA[br]American inventor and the first successful manufacturer of celluloid.[br]Leaving school at the age of 16, Hyatt spent ten years in the printing trade, demonstrating meanwhile a talent for invention. The offer of a prize of $10,000 for finding a substitute for ivory billiard balls stimulated Hyatt to experiment with various materials. After many failures, he arrived at a composition of paper flock, shellac and collodion, which was widely adopted. Noting the "skin" left after evaporating collodion, he continued his experiments, using nitrocellulose as a base for plastic materials, yet he remained largely ignorant of both chemistry and the dangers of this explosive substance. Independently of Parkes in England, he found that a mixture of nitrocellulose, camphor and a little alcohol could, by heating, be made soft enough to mould but became hard at room temperature. Hyatt's first patent for the material, celluloid, was dated 12 July 1870 (US pat. 105338) and was followed by many others for making domestic and decorative articles of celluloid, replacing more expensive natural materials. Manufacture began at Albany in the winter of 1872–3. In 1881 Hyatt and his brother Isiah Smith floated the Hyatt Pure Water Company. By introducing purifying coagulants into flowing water, they avoided the expense and delay of allowing the water to settle in large tanks before filtration. Many towns and paper and woollen mills adopted the new process, and in 1891 it was introduced into Europe. During 1891–2, Hyatt devised a widely used type of roller bearing. Later inventions included a sugar-cane mill, a multistitch sewing machine and a mill for the cold rolling and straightening of steel shafts. It was characteristic of Hyatt's varied inventions that they achieved improved results at less expense.[br]Principal Honours and DistinctionsSociety of Chemical Industry Perkin Medal 1914.Bibliography12 July 1870, US patent no. 105,338 (celluloid).Further ReadingObituary, 1920, Chem. Metal. Eng. (19 May).J. Soc. Chem. Ind. for 16 March 1914 and J. Ind. Eng. Chem. for March 1914 carried accounts of Hyatt's achievements, on the occasion of his award of the Perkin Medal of the Society of Chemical Industry in that year.LRD
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