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1 занимать видное место в
•Prominent among the heavy machinery in the plant will be two rail-feeding type piano-milling machines.
•Modern forging occupies a prominent place in primary metalworking.
Русско-английский научно-технический словарь переводчика > занимать видное место в
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2 занимать видное место в
•Prominent among the heavy machinery in the plant will be two rail-feeding type piano-milling machines.
•Modern forging occupies a prominent place in primary metalworking.
Русско-английский научно-технический словарь переводчика > занимать видное место в
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3 Root, Elisha King
[br]b. 10 May 1808 Ludlow, Massachusetts, USAd. 31 August 1865 Hartford, Connecticut, USA[br]American mechanical engineer and inventor.[br]After an elementary education, Elisha K.Root was apprenticed as a machinist and worked in that occupation at Ware and Chicopee Falls, Massachusetts. In 1832 he went to Collinsville, Connecticut, to join the Collins Company, manufacturers of axes. He started as a lathe hand but soon became Foreman and, in 1845, Superintendent. While with the company, he devised and patented special-purpose machinery for forming axes which transformed the establishment from a primitive workshop to a modern factory.In 1849 Root was offered positions by four different manufacturers and accepted the post of Superintendent of the armoury then being planned at Hartford, Connecticut, by Samuel Colt for the manufacture of his revolver pistol, which he had invented in 1835. Initial acceptance of the revolver was slow, but by the mid1840s Colt had received sufficient orders to justify the establishment of a new factory and Root was engaged to design and install the machinery. The principle of interchangeable manufacture was adopted, and Root devised special machines for boring, rifling, making cartridges, etc., and a system of jigs, fixtures, tools and gauges. One of these special machines was a drop hammer that he invented and patented in 1853 and which established the art of die-forging on a modern basis. He was also associated with F.A. Pratt in the design of the "Lincoln" milling machine in 1855.When Colt died in 1862, Root became President of the company and continued in that capacity until his own death. It was said that he was one of the ablest and most highly paid mechanics from New England and that he was largely responsible for the success of both the Collins and the Colt companies.[br]Further ReadingJ.W.Roe, 1916, English and American Tool Builders, New Haven; reprinted 1926, New York, and 1987, Bradley, Ill. (describes Root's work at the Colt Armory).Paul Uselding, 1974, "Elisha K.Root, Forging, and the “American System”", "Elisha K.Root, forging, and the “American System”", Technology and Culture 15:543–68 (provides further biographical details, his work with the Collins Company and a list of his patents).RTS -
4 pressure
1. n давление, надавливание; сжатие2. n давление, воздействие; нажимpopulation pressure — давление избытка населения; экономическое перенаселение; демографическое давление
3. n чрезмерная эксплуатация или использование4. n затруднительные обстоятельства, трудное положение5. n гнёт6. n неотложность, безотлагательность7. n спец. давление; сжатиеpressure zone — зона повышенного давления; зона нагнетания
8. n метеор. атмосферное давление9. n тех. прессование, вдавливание10. n редк. эл. напряжение11. n редк. печатаниеprinting pressure — давление печатания, натиск
12. n отпечатокСинонимический ряд:1. coercion (noun) coercion; constraint; insistence; persuasion2. force (noun) duress; force; influence; potency; power; violence3. strain (noun) burden; demand; obligation; repression; strain; stress; tension; urgency4. push (verb) coerce; compel; constrain; drive; force; impel; insist; make; oblige; overpress; press; prod; push; urgeАнтонимический ряд: -
5 Perkins, Jacob
[br]b. 9 July 1766 Newburyport, Massachusetts, USAd. 30 July 1849 London, England[br]American inventor of a nail-making machine and a method of printing banknotes, investigator of the use of steam at very high pressures.[br]Perkins's occupation was that of a gold-and silversmith; while he does not seem to have followed this after 1800, however, it gave him the skills in working metals which he would continue to employ in his inventions. He had been working in America for four years before he patented his nail-making machine in 1796. At the time there was a great shortage of nails because only hand-forged ones were available. By 1800, other people had followed his example and produced automatic nail-making machines, but in 1811 Perkins' improved machines were introduced to England by J.C. Dyer. Eventually Perkins had twenty-one American patents for a range of inventions in his name.In 1799 Perkins invented a system of engraving steel plates for printing banknotes, which became the foundation of modern siderographic work. It discouraged forging and was adopted by many banking houses, including the Federal Government when the Second United States Bank was inaugurated in 1816. This led Perkins to move to Philadelphia. In the intervening years, Perkins had improved his nail-making machine, invented a machine for graining morocco leather in 1809, a fire-engine in 1812, a letter-lock for bank vaults and improved methods of rolling out spoons in 1813, and improved armament and equipment for naval ships from 1812 to 1815.It was in Philadelphia that Perkins became interested in the steam engine, when he met Oliver Evans, who had pioneered the use of high-pressure steam. He became a member of the American Philosophical Society and conducted experiments on the compressibility of water before a committee of that society. Perkins claimed to have liquified air during his experiments in 1822 and, if so, was the real discoverer of the liquification of gases. In 1819 he came to England to demonstrate his forgery-proof system of printing banknotes, but the Bank of England was the only one which did not adopt his system.While in London, Perkins began to experiment with the highest steam pressures used up to that time and in 1822 took out his first of nineteen British patents. This was followed by another in 1823 for a 10 hp (7.5 kW) engine with only 2 in. (51 mm) bore, 12 in. (305 mm) stroke but a pressure of 500 psi (35 kg/cm2), for which he claimed exceptional economy. After 1826, Perkins abandoned his drum boiler for iron tubes and steam pressures of 1,500 psi (105 kg/cm2), but the materials would not withstand such pressures or temperatures for long. It was in that same year that he patented a form of uniflow cylinder that was later taken up by L.J. Todd. One of his engines ran for five days, continuously pumping water at St Katherine's docks, but Perkins could not raise more finance to continue his experiments.In 1823 one his high-pressure hot-water systems was installed to heat the Duke of Wellington's house at Stratfield Saye and it acquired a considerable vogue, being used by Sir John Soane, among others. In 1834 Perkins patented a compression ice-making apparatus, but it did not succeed commercially because ice was imported more cheaply from Norway as ballast for sailing ships. Perkins was often dubbed "the American inventor" because his inquisitive personality allied to his inventive ingenuity enabled him to solve so many mechanical challenges.[br]Further ReadingHistorical Society of Pennsylvania, 1943, biography which appeared previously as a shortened version in the Transactions of the Newcomen Society 24.D.Bathe and G.Bathe, 1943–5, "The contribution of Jacob Perkins to science and engineering", Transactions of the Newcomen Society 24.D.S.L.Cardwell, 1971, From Watt to Clausius. The Rise of Thermodynamics in the Early Industrial Age, London: Heinemann (includes comments on the importance of Perkins's steam engine).A.F.Dufton, 1940–1, "Early application of engineering to warming of buildings", Transactions of the Newcomen Society 21 (includes a note on Perkins's application of a high-pressure hot-water heating system).RLH
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