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21 Guericke, Otto von
[br]b. 20 November 1602 Magdeburg, Saxony, Germanyd. 11 May 1686 Hamburg, Germany[br]German engineer and physicist, inventor of the air pump and investigator of the properties of a vacuum.[br]Guericke was born into a patrician family in Magdeburg. He was educated at the University of Leipzig in 1617–20 and at the University of Helmstedt in 1620. He then spent two years studying law at Jena, and in 1622 went to Leiden to study law, mathematics, engineering and especially fortification. He spent most of his life in politics, for he was elected an alderman of Magdeburg in 1626. After the destruction of Magdeburg in 1631, he worked in Brunswick and Erfurt as an engineer for the Swedish government, and then in 1635 for the Electorate of Saxony. He was Mayor of Magdeburg for thirty years, between 1646 and 1676. He was ennobled in 1666 and retired from public office in 168land went to Hamburg. It was through his attendances at international congresses and at princely courts that he took part in the exchange of scientific ideas.From his student days he was concerned with the definition of space and posed three questions: can empty space exist or is space always filled? How can heavenly bodies affect each other across space and how are they moved? Is space, and so also the heavenly bodies, bounded or unbounded? In c. 1647 Guericke made a suction pump for air and tried to exhaust a beer barrel, but he could not stop the leaks. He then tried a copper sphere, which imploded. He developed a series of spectacular demonstrations with his air pump. In 1654 at Rattisbon he used a vertical cylinder with a well-fitting piston connected over pulleys by a rope to fifty men, who could not stop the piston descending when the cylinder was exhausted. More famous were his copper hemispheres which, when exhausted, could not be drawn apart by two teams of eight horses. They were first demonstrated at Magdeburg in 1657 and at the court in Berlin in 1663. Through these experiments he discovered the elasticity of air and began to investigate its density at different heights. He heard of the work of Torricelli in 1653 and by 1660 had succeeded in making barometric forecasts. He published his famous work New Experiments Concerning Empty Space in 1672. Between 1660 and 1663 Guericke constructed a large ball of sulphur that could be rotated on a spindle. He found that, when he pressed his hand on it and it was rotated, it became strongly electrified; he thus unintentionally became the inventor of the first machine to generate static electricity. He attempted to reach a complete physical explanation of the world and the heavens with magnetism as a primary force and evolved an explanation for the rotation of the heavenly bodies.[br]Bibliography1672, Experimenta nova (ut vocantur) Magdeburgica de vacuo spatio (New Experiments Concerning Empty Space).Further ReadingF.W.Hoffmann, 1874, Otto von Guericke (a full biography).T.I.Williams (ed.), 1969, A Biographical Dictionary of Scientists, London: A. \& C.Black (contains a short account of his life).Chambers Concise Dictionary of Scientists, 1989, Cambridge.Dictionary of Scientific Biography, Vol. V, New York.C.Singer (ed.), 1957, A History of Technology, Vols. III and IV, Oxford University Press (includes references to Guericke's inventions).RLH -
22 вакуум-цилиндр усилителя тормоза
Military: brake vacuum booster cylinderУниверсальный русско-английский словарь > вакуум-цилиндр усилителя тормоза
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23 вакуумная камера гидровакуумного усилителя
Engineering: vacuum power cylinderУниверсальный русско-английский словарь > вакуумная камера гидровакуумного усилителя
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24 вакуумный формный цилиндр
Polygraphy: vacuum-operated printing cylinderУниверсальный русско-английский словарь > вакуумный формный цилиндр
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25 отсасывающий барабан
Polymers: suction cylinder, suction drum, suction roll, vacuum rollУниверсальный русско-английский словарь > отсасывающий барабан
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26 цилиндр с вакуумной рубашкой
Coolers: vacuum jacketed cylinderУниверсальный русско-английский словарь > цилиндр с вакуумной рубашкой
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27 цилиндр с диафрагмой вакуум-механизма
Automobile industry: vacuum diaphragm cylinderУниверсальный русско-английский словарь > цилиндр с диафрагмой вакуум-механизма
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28 цилиндр с диафрагмой вакууммеханизма
Automobile industry: vacuum diaphragm cylinderУниверсальный русско-английский словарь > цилиндр с диафрагмой вакууммеханизма
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29 цилиндр, на котором форма закрепляется с помощью вакуума
Makarov: vacuum-operated printing cylinderУниверсальный русско-английский словарь > цилиндр, на котором форма закрепляется с помощью вакуума
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30 Saugluftschaltzylinder
Deutsch-Englisch Wörterbuch Engineering > Saugluftschaltzylinder
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31 конденсация
* * *конденса́ция ж.
condensationва́куумная конденса́ция — vacuum condensationконденса́ция вла́ги — moisture condensationка́пельная конденса́ция — dropwise [rain-like] condensationкапилля́рная конденса́ция — capillary condensationконденса́ция на ио́нах — ion condensationнача́льная конденса́ция — initial [cylinder] condensationконденса́ция на я́драх — nuclear condensationконденса́ция па́ра — ( водяного) steam condensation; ( паровой фазы) vapour condensationплё́ночная конденса́ция — film-type condensationконденса́ция смеше́нием — direct-contact condensationфракцио́нная конденса́ция — fractional condensationчасти́чная конденса́ция — partial condensation -
32 imutela
technology• vacuum rolltechnology• suction rollertechnology• suction rolltechnology• suction cylinder -
33 Matteucci, Felice
SUBJECT AREA: Steam and internal combustion engines[br]b. 1803 Italyd. 1887 Italy[br]Italian engineer, co-inventor of internal-combustion engines.[br]A distinguished hydraulic engineer, Matteucci is more widely known for his work on early internal-combustion engines. In 1851, during a landreclamation project in Florence, he became acquainted with Eugenio Barsanti. Together they succeeded in designing and producing a number of the first type of gas engines to produce a vacuum within a closed cylinder, atmospheric pressure then being utilized to produce the power stroke. The principle was demonstrated by Cecil in 1820 and was used by Samuel Brown in 1827 and by N.A. Otto in 1867. The company Società Promotrice del Nuovo Motore Barsanti e Matteucci was formed in 1860, but ill health forced Matteucci to resign in 1862, and in 1864 Barsanti, whilst negotiating mass production of engines with Cockerill of Seraing, Belgium, contracted typhoid and later died. Efforts to continue the business in Italy subsequently failed and Matteucci returned to his engineering practice.[br]Bibliography13 May 1852, British Provisional Patent no. 1,072 (the Barsanti and Matteucci engine). 12 June 1857, British patent no. 1,655 (contained many notable improvements to the design).Further ReadingThe Engineer (1858) 5:73–4 (for an account of the Italian engine).Vincenzo Vannacci, 1955, L'invenzione del motore a scoppio realizzota dai toscani Barsanti e Matteucci 1854–1954, Florence.KAB -
34 Murdock (Murdoch), William
[br]b. 21 August 1754 Cumnock, Ayrshire, Scotlandd. 15 November 1839 Handsworth, Birmingham, England[br]Scottish engineer and inventor, pioneer in coal-gas production.[br]He was the third child and the eldest of three boys born to John Murdoch and Anna Bruce. His father, a millwright and joiner, spelled his name Murdock on moving to England. He was educated for some years at Old Cumnock Parish School and in 1777, with his father, he built a "wooden horse", supposed to have been a form of cycle. In 1777 he set out for the Soho manufactory of Boulton \& Watt, where he quickly found employment, Boulton supposedly being impressed by the lad's hat. This was oval and made of wood, and young William had turned it himself on a lathe of his own manufacture. Murdock quickly became Boulton \& Watt's representative in Cornwall, where there was a flourishing demand for steam-engines. He lived at Redruth during this period.It is said that a number of the inventions generally ascribed to James Watt are in fact as much due to Murdock as to Watt. Examples are the piston and slide valve and the sun-and-planet gearing. A number of other inventions are attributed to Murdock alone: typical of these is the oscillating cylinder engine which obviated the need for an overhead beam.In about 1784 he planned a steam-driven road carriage of which he made a working model. He also planned a high-pressure non-condensing engine. The model carriage was demonstrated before Murdock's friends and travelled at a speed of 6–8 mph (10–13 km/h). Boulton and Watt were both antagonistic to their employees' developing independent inventions, and when in 1786 Murdock set out with his model for the Patent Office, having received no reply to a letter he had sent to Watt, Boulton intercepted him on the open road near Exeter and dissuaded him from going any further.In 1785 he married Mary Painter, daughter of a mine captain. She bore him four children, two of whom died in infancy, those surviving eventually joining their father at the Soho Works. Murdock was a great believer in pneumatic power: he had a pneumatic bell-push at Sycamore House, his home near Soho. The pattern-makers lathe at the Soho Works worked for thirty-five years from an air motor. He also conceived the idea of a vacuum piston engine to exhaust a pipe, later developed by the London Pneumatic Despatch Company's railway and the forerunner of the atmospheric railway.Another field in which Murdock was a pioneer was the gas industry. In 1791, in Redruth, he was experimenting with different feedstocks in his home-cum-office in Cross Street: of wood, peat and coal, he preferred the last. He designed and built in the backyard of his house a prototype generator, washer, storage and distribution plant, and publicized the efficiency of coal gas as an illuminant by using it to light his own home. In 1794 or 1795 he informed Boulton and Watt of his experimental work and of its success, suggesting that a patent should be applied for. James Watt Junior was now in the firm and was against patenting the idea since they had had so much trouble with previous patents and had been involved in so much litigation. He refused Murdock's request and for a short time Murdock left the firm to go home to his father's mill. Boulton \& Watt soon recognized the loss of a valuable servant and, in a short time, he was again employed at Soho, now as Engineer and Superintendent at the increased salary of £300 per year plus a 1 per cent commission. From this income, he left £14,000 when he died in 1839.In 1798 the workshops of Boulton and Watt were permanently lit by gas, starting with the foundry building. The 180 ft (55 m) façade of the Soho works was illuminated by gas for the Peace of Paris in June 1814. By 1804, Murdock had brought his apparatus to a point where Boulton \& Watt were able to canvas for orders. Murdock continued with the company after the death of James Watt in 1819, but retired in 1830 and continued to live at Sycamore House, Handsworth, near Birmingham.[br]Principal Honours and DistinctionsRoyal Society Rumford Gold Medal 1808.Further ReadingS.Smiles, 1861, Lives of the Engineers, Vol. IV: Boulton and Watt, London: John Murray.H.W.Dickinson and R.Jenkins, 1927, James Watt and the Steam Engine, Oxford: Clarendon Press.J.A.McCash, 1966, "William Murdoch. Faithful servant" in E.G.Semler (ed.), The Great Masters. Engineering Heritage, Vol. II, London: Institution of Mechanical Engineers/Heinemann.IMcNBiographical history of technology > Murdock (Murdoch), William
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