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81 Fox, Samson
SUBJECT AREA: Mechanical, pneumatic and hydraulic engineering, Metallurgy, Steam and internal combustion engines[br]b. 11 July 1838 Bowling, near Bradford, Yorkshire, Englandd. 24 October 1903 Walsall, Staffordshire, England[br]English engineer who invented the corrugated boiler furnace.[br]He was the son of a cloth mill worker in Leeds and at the age of 10 he joined his father at the mill. Showing a mechanical inclination, he was apprenticed to a firm of machine-tool makers, Smith, Beacock and Tannett. There he rose to become Foreman and Traveller, and designed and patented tools for cutting bevelled gears. With his brother and one Refitt, he set up the Silver Cross engineering works for making special machine tools. In 1874 he founded the Leeds Forge Company, acting as Managing Director until 1896 and then as Chairman until shortly before his death.It was in 1877 that he patented his most important invention, the corrugated furnace for steam-boilers. These furnaces could withstand much higher pressures than the conventional form, and higher working pressures in marine boilers enabled triple-expansion engines to be installed, greatly improving the performance of steamships, and the outcome was the great ocean-going liners of the twentieth century. The first vessel to be equipped with the corrugated furnace was the Pretoria of 1878. At first the furnaces were made by hammering iron plates using swage blocks under a steam hammer. A plant for rolling corrugated plates was set up at Essen in Germany, and Fox installed a similar mill at his works in Leeds in 1882.In 1886 Fox installed a Siemens steelmaking plant and he was notable in the movement for replacing wrought iron with steel. He took out several patents for making pressed-steel underframes for railway wagons. The business prospered and Fox opened a works near Chicago in the USA, where in addition to wagon underframes he manufactured the first American pressed-steel carriages. He later added a works at Pittsburgh.Fox was the first in England to use water gas for his metallurgical operations and for lighting, with a saving in cost as it was cheaper than coal gas. He was also a pioneer in the acetylene industry, producing in 1894 the first calcium carbide, from which the gas is made.Fox took an active part in public life in and around Leeds, being thrice elected Mayor of Harrogate. As a music lover, he was a benefactor of musicians, contributing no less than £45,000 towards the cost of building the Royal College of Music in London, opened in 1894. In 1897 he sued for libel the author Jerome K.Jerome and the publishers of the Today magazine for accusing him of misusing his great generosity to the College to give a misleading impression of his commercial methods and prosperity. He won the case but was not awarded costs.[br]Principal Honours and DistinctionsRoyal Society of Arts James Watt Silver Medal and Howard Gold Medal. Légion d'honneur 1889.Bibliography1877, British Patent nos. 1097 and 2530 (the corrugated furnace or "flue", as it was often called).Further ReadingObituary, 1903, Proceedings of the Institution of Mechanical Engineers: 919–21.Obituary, 1903, Proceedings of the Institution of Civil Engineers (the fullest of the many obituary notices).G.A.Newby, 1993, "Behind the fire doors: Fox's corrugated furnace 1877 and the high pressure steamship", Transactions of the Newcomen Society 64.LRD -
82 Otis, Elijah Graves
SUBJECT AREA: Architecture and building[br]b. 3 August 1811 Halifax, Vermont, USAd. 8 April 1861 Yonkers, New York, USA[br]American mechanic and inventor of the safety passenger elevator.[br]Otis was educated in public schools and worked in a variety of jobs in the trucking and construction industries as well as in a machine shop, a carriage makers, a grist mill, and a saw mill and in a bedstead factory. It was when supervisor of construction of a new bedstead factory at Yonkers in 1852 that he developed the innovative safety features of an elevator that was to be the foundation of his later success. If the ropes or cables of a hoist should break, springs would force pawls on the lift cage to engage the ratcheted guide rails fitted into the sides of the shaft and so stop the lift. In 1853 he was planning to leave his job to join the California Gold Rush but representatives of two New York City firms who had seen his Safety Elevator and were impressed with the safety devices requested that he make them replicas. He purchased space in the Yonkers plant and began manufacture of the lifts. Demand was small at first until in 1854 he exhibited at the American Institute Fair in New York City with an impressive performance. Standing on top of the lift cage, he ordered the rope supporting it to be cut. The safety pawls engaged and the cage stopped its downward movement. From then on orders gradually increased and in 1857 he installed the first safety lift for passengers in the Haughtwout Store in New York City. The invention immediately became popular and started a revolution in architecture and the construction industry, leading to the design and building of skyscrapers, as previously buildings were limited to six or seven storeys, because of the stairs people had to climb. Otis patented several other devices, the most important of which was for a steam elevator which established the future of the Otis Elevator Company. He died at Yonkers in 1861, leaving his business to his sons.[br]Further ReadingScribner's and Webster's Dictionaries of Biography.IMcN / DY -
83 unit
unit [ˈju:nɪt]1. nouna. ( = one item) unité fb. ( = complete section) élément mc. ( = buildings) ensemble m2. compounds* * *['juːnɪt]1) ( whole) unité f2) ( group with specific function) gen groupe m; (in army, police) unité f3) (building, department) gen, Medicine service m; Industry unité f4) ( in measurements) also Mathematics unité f5) ( part of machine) unité f6) ( piece of furniture) élément m7) University unité f de valeur8) School ( in textbook) unité f9) US ( apartment) appartement m -
84 glazing
nC&G installing windows colocación de ventanas f, windows of building instalación de vidrios en las ventanas fCONST setting glass vidriera f (AmL), escaparate m (Esp)FOOD glaseado mFUELLESS flat plate collector vidriado mPAPER alisado m, satinado mPROD encristalado m, esmaltado m, glaseado m, satinado mTEXTIL glaseado m, lustrado m -
85 prime
A n1 ( peak period) in one's prime (politically, professionally) à son apogée ; ( physically) dans la fleur de l'âge ; in its prime [organization, industry] à son apogée ; to be past one's prime [person] avoir passé son heure de gloire ; to be past its prime [building, institution, car] avoir connu des jours meilleurs ; in the prime of life dans la fleur de l'âge ;3 Relig prime f.B adj1 ( chief) [aim, candidate, factor, target, suspect] principal ; [importance] primordial ; of prime importance de première importance ;2 Comm ( good quality) ( épith) [site, location, land] de premier ordre ; [meat, cuts] de premier choix ; [foodstuffs] d'une parfaite fraîcheur ; in prime condition [machine] en parfait état ; [livestock] en parfaite condition ; of prime quality de première qualité ;3 ( classic) [example, instance] excellent (before n) ;4 Math premier/-ière (after n).C vtr1 ( brief) préparer [witness, interviewee] ; to prime sb about mettre qn au courant de [details, facts] ; to prime sb to say souffler à qn de dire ; to be primed for sth être préparé pour qch ;3 Mil amorcer [device, bomb, firearm] ;4 Tech amorcer [pump]. -
86 boiler
boiler ['bɔɪlə(r)](a) (furnace) chaudière f; (domestic) chaudière f; British (washing machine) lessiveuse f; (pot) casserole f∎ (old) boiler (woman) vieille peau f►► boiler room (in building) salle f des chaudières, chaufferie f; Nautical (in boat) chaufferie f, chambre f de chauffe; American Finance = organisation qui vend illégalement au public des produits financiers très spéculatifs ou sans valeur;British Industry boiler suit (for work) bleu m ou bleus mpl (de travail); (fashion garment) salopette f -
87 Tesla, Nikola
SUBJECT AREA: Electricity[br]b. 9 July 1856 Smiljan, Croatiad. 7 January 1943 New York, USA[br]Serbian (naturalized American) engineer and inventor of polyphase electrical power systems.[br]While at the technical institute in Graz, Austria, Tesla's attention was drawn to the desirability of constructing a motor without a commutator. He considered the sparking between the commutator and brushes of the Gramme machine when run as a motor a serious defect. In 1881 he went to Budapest to work on the telegraph system and while there conceived the principle of the rotating magnetic field, upon which all polyphase induction motors are based. In 1882 Tesla moved to Paris and joined the Continental Edison Company. After building a prototype of his motor he emigrated to the United States in 1884, becoming an American citizen in 1889. He left Edison and founded an independent concern, the Tesla Electric Company, to develop his inventions.The importance of Tesla's first patents, granted in 1888 for alternating-current machines, cannot be over-emphasized. They covered a complete polyphase system including an alternator and induction motor. Other patents included the polyphase transformer, synchronous motor and the star connection of three-phase machines. These were to become the basis of the whole of the modern electric power industry. The Westinghouse company purchased the patents and marketed Tesla motors, obtaining in 1893 the contract for the Niagara Falls two-phase alternators driven by 5,000 hp (3,700 kW) water turbines.After a short period with Westinghouse, Tesla resigned to continue his research into high-frequency and high-voltage phenomena using the Tesla coil, an air-cored transformer. He lectured in America and Europe on his high-frequency devices, enjoying a considerable international reputation. The name "tesla" has been given to the SI unit of magnetic-flux density. The induction motor became one of the greatest advances in the industrial application of electricity. A claim for priority of invention of the induction motor was made by protagonists of Galileo Ferraris (1847–1897), whose discovery of rotating magnetic fields produced by alternating currents was made independently of Tesla's. Ferraris demonstrated the phenomenon but neglected its exploitation to produce a practical motor. Tesla himself failed to reap more than a small return on his work and later became more interested in scientific achievement than commercial success, with his patents being infringed on a wide scale.[br]Principal Honours and DistinctionsAmerican Institute of Electrical Engineers Edison Medal 1917. Tesla received doctorates from fourteen universities.Bibliography1 May 1888, American patent no. 381,968 (initial patent for the three-phase induction motor).1956, Nikola Tesla, 1856–1943, Lectures, Patents, Articles, ed. L.I.Anderson, Belgrade (selected works, in English).1977, My Inventions, repub. Zagreb (autobiography).Further ReadingM.Cheney, 1981, Tesla: Man Out of Time, New Jersey (a full biography). C.Mackechnie Jarvis, 1969, in IEE Electronics and Power 15:436–40 (a brief treatment).T.C.Martin, 1894, The Inventions, Researches and Writings of Nikola Tesla, New York (covers his early work on polyphase systems).GW
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