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1 Cort, Henry
SUBJECT AREA: Metallurgy[br]b. 1740 Lancaster, Englandd. 1800 Hampstead, near London, England[br]English ironmaster, inventor of the puddling process and grooved rollers for forming iron into bars.[br]His father was a mason and brickmaker but, anxious to improve himself, Cort set up in London in 1765 as a navy agent, said to have been a profitable business. He recognized that, at that time, the conversion of pig iron to malleable or wrought iron, which was needed in increasing quantities as developments in industry and mechanical engineering gathered pace, presented a bottleneck in the ironmaking process. The finery hearth was still in use, slow and inefficient and requiring the scarce charcoal as fuel. To tackle this problem, Cort gave up his business and acquired a furnace and slitting mill at Fontley, near Fareham in Hampshire. In 1784 he patented his puddling process, by which molten pig iron on the bed of a reverberatory furnace was stirred with an iron bar and, by the action of the flame and the oxygen in the air, the carbon in the pig iron was oxidized, leaving nearly pure iron, which could be forged to remove slag. In this type of furnace, the fuel and the molten iron were separated, so that the cheaper coal could be used as fuel. It was the stirring action with the iron bar that gave the name "puddling" to the process. Others had realized the problem and reached a similar solution, notably the brothers Thomas and George Cranage, but only Cort succeeded in developing a commercially viable process. The laborious hammering of the ball of iron thus produced was much reduced by an invention of the previous year, 1783. This too was patented. The iron was passed between grooved rollers to form it into bars. Cort entered into an agreement with Samuel Jellico to set up an ironworks at Gosport to exploit his inventions. Samuel's father Adam, Deputy Paymaster of the Navy, advanced capital for this venture, Cort having expended much of his own resources in the experimental work that preceded his inventions. However, it transpired that Jellico senior had, unknown to Cort, used public money to advance the capital; the Admiralty acted to recover the money and Cort lost heavily, including the benefits from his patents. Rival ironmasters were quick to pillage the patents. In 1790, and again the following year, Cort offered unsuccessfully to work for the military. Finally, in 1794, at the instigation of the Prime Minister, William Pitt the Younger, Cort was paid a pension of £200 per year in recognition of the value of his improvements in the technology of ironmaking, although this was reduced by deductions to £160. After his death, the pension to his widow was halved, while some of his children received a pittance. Without the advances made by Cort, however, the iron trade could not have met the rapidly increasing demand for iron during the industrial revolution.[br]Bibliography1787, A Brief State of Facts Relative to the New Method of Making Bar Iron with Raw Pit Coal and Grooved Rollers (held in the Science Museum Library archive collection).Further ReadingH.W.Dickinson, 1941, "Henry Cort's bicentary", Transactions of the Newcomen Society 21: 31–47 (there are further references to grooved rollers and the puddling process in Vol. 49 of the same periodical (1978), on pp. 153–8).R.A.Mott, 1983, Henry Con, the Great Finery Creator of Puddled Iron, Sheffield: Historical Metallurgy Society.LRD -
2 Metallurgy
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3 Hall, Joseph
SUBJECT AREA: Metallurgy[br]b. 1789d. 1862[br]English ironmaker who invented the wet puddling process.[br]Hall was a practical man with no theoretical background: his active years were spent at Bloomfield Ironworks, Tipton, Staffordshire. Around 1816 he began experimenting in the production of wrought iron. At that time, blast-furnace or cast iron was converted to wrought iron by the dry puddling process invented by Henry Cort in 1784. In this process, the iron was decarburized (i.e. had its carbon removed) by heating it in a current of air in a furnace with a sand bed. Some of the iron combined with the silica in the sand to form a slag, however, so that no less than 2 tons of cast iron were needed to produce 1 ton of wrought. Hall found that if bosh cinder was charged into the furnace, a vigorous reaction occurred in which the cast iron was converted much more quickly than before, to produce better quality wrought iron, a ton of which could be formed by no more than 21 cwt (1,067 kg) of cast iron. Because of the boiling action, the process came to be known as pig boiling. Bosh cinder, essentially iron oxide, was formed in the water troughs or boshes in which workers cooled their tools used in puddling and reacted with the carbon in the cast iron. The advantages of pig boiling over dry puddling were striking enough for the process to be widely used by the late 1820s. By mid-century it was virtually the only process used for producing wrought iron, an essential material for mechanical and civil engineering during the Industrial Revolution. Hall reckoned that if he had patented his invention he would have "made a million". As luck would have it, the process that he did patent in 1838 left his finances unchanged: this was for the roasting of cinder for use as the base of the puddling furnace, providing better protection than the bosh cinder for the iron plates that formed the base.[br]Bibliography1857, The Iron Question Considered in Connection with Theory, Practice and Experience with Special Reference to the Bessemer Process, London.Further ReadingJ.Percy, 1864, Metallurgy. Iron and Steel, London, pp. 670 ff. W.K.V.Gale, Iron and Steel, London: Longmans, pp. 46–50.LRD -
4 Reynolds, Richard
[br]b. 1 November 1735 Bristol, Englandd. 10 September 1816 Cheltenham, Gloucestershire, England[br]English ironmaster who invented iron rails.[br]Reynolds was born into a Quaker family, his father being an iron merchant and a considerable customer for the products of the Darbys (see Abraham Darby) of Coalbrookdale in Shropshire. After education at a Quaker boarding school in Pickwick, Wiltshire, Reynolds was apprenticed to William Fry, a grocer of Bristol, from whom he would have learned business methods. The year before the expiry of his apprenticeship in 1757, Reynolds was being sent on business errands to Coalbrookdale. In that year he met and married Hannah Darby, the daughter of Abraham Darby II. At the same time, he acquired a half-share in the Ketley ironworks, established not long before, in 1755. There he supervised not only the furnaces at Ketley and Horsehay and the foundry, but also the extension of the railway, linking this site to Coalbrookdale itself.On the death of Abraham Darby II in 1763, Reynolds took charge of the whole works during the minority of Abraham Darby III. During this period, the most notable development was the introduction by the Cranage brothers of a new way of converting pig-iron to wrought iron, a process patented in 1766 that used coal in a reverberatory furnace. This, with other processes for the same purpose, remained in use until superseded by the puddling process patented by Henry Cort in 1783 and 1784. Reynolds's most important innovation was the introduction of cast-iron rails in 1767 on the railway around Coalbrookdale. A useful network had been in operation for some time with wooden rails, but these wore out quickly and were expensive to maintain. Reynolds's iron rails were an immediate improvement, and some 20 miles (32 km) were laid within a short time. In 1768 Abraham Darby III was able to assume control of the Coalbrookdale works, but Reynolds had been extending his own interest in other ironworks and various other concerns, earning himself considerable wealth. When Darby was oppressed with loan repayments, Reynolds bought the Manor of Madely, which made him Landlord of the Coalbrookdale Company; by 1780 he was virtually banker to the company.[br]Further ReadingH.M.Rathbone, 1852, Letters of Richard Reynolds with a Memoir of his Life, London.A.Raistrick, 1989, Dynasty of Iron Founders, 2nd edn, Ironbridge Gorge Museum Trust (contains many details of Reynolds's life).LRD
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Cort, Henry — born 1740, Lancaster, Lancashire, Eng. died 1800, London British inventor and industrialist. In 1783 he obtained a patent for producing iron bars quickly and economically in a rolling mill with grooved rolls. The following year he patented his… … Universalium
Cort, Henry — (1740, Lancaster, Lancashire, Inglaterra–1800, Londres). Inventor e industrial británico. En 1783 obtuvo una patente para producir en forma rápida y económica barras de hierro en un laminador con cilindros acanalados. El año siguiente patentó su… … Enciclopedia Universal
Henry Cort — (1740 ndash; May 23 1800) was an English ironmaster. During the Industrial Revolution in England, Cort began refining iron from pig iron to wrought iron (or bar iron) using innovative production systems. In 1783 he patented the puddling process… … Wikipedia
Henry Cort — Cort, Henry Nacimiento 1740 Lancaster (Reino Unido), Inglaterra Fallecimiento … Wikipedia Español
Henry Cort — (* 1740 in Lancaster; † 23. Mai 1800 vermutlich in London) war ein englischer Metallurg und Unternehmer während der Industriellen Revolution in England. Cort verbesserte die Qualität des Eisens entscheidend. Er führte 1783 das mechanische… … Deutsch Wikipedia
henry — /hen ree/, n., pl. henries, henrys. Elect. the SI unit of inductance, formally defined to be the inductance of a closed circuit in which an electromotive force of one volt is produced when the electric current in the circuit varies uniformly at a … Universalium
Henry — /hen ree/, n. 1. Joseph, 1797 1878, U.S. physicist. 2. O., pen name of William Sydney Porter. 3. Patrick, 1736 99, American patriot, orator, and statesman. 4. Cape, a cape in SE Virginia at the mouth of the Chesapeake Bay. 5. Fort. See … Universalium
Henry — ► sustantivo masculino ELECTRICIDAD Denominación del henrio en la nomenclatura internacional. IRREG. plural henrys * * * henrio o henry (de J. Henry, físico inglés) m. Fís. Unidad de inductancia eléctrica en el Sistema Internacional. * * * … Enciclopedia Universal
henry — ► sustantivo masculino ELECTRICIDAD Denominación del henrio en la nomenclatura internacional. IRREG. plural henrys * * * henrio o henry (de J. Henry, físico inglés) m. Fís. Unidad de inductancia eléctrica en el Sistema Internacional. * * * henry … Enciclopedia Universal
Cort — is the name of several people: Cornelis Cort (1536–1578), Dutch engraver Henry Cort (1740–1800), English ironmaster Frans de Cort (1834–1878), Flemish writer John Cort (impresario) (1861–1929), American impresario John Cort (1913–2006), longtime… … Wikipedia
Cort — ist der Familienname folgender Personen: Carl Cort (* 1977), englischer Fußballspieler Bud Cort (* 1948), US amerikanischer Schauspieler Cornelis Cort (1533–1578), niederländischer Kupferstecher Henry Cort (1740–1800), englischer Unternehmer und… … Deutsch Wikipedia
