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121 Murray, Matthew
SUBJECT AREA: Land transport, Mechanical, pneumatic and hydraulic engineering, Railways and locomotives, Steam and internal combustion engines[br]b. 1765 near Newcastle upon Tyne, Englandd. 20 February 1826 Holbeck, Leeds, England[br]English mechanical engineer and steam engine, locomotive and machine-tool pioneer.[br]Matthew Murray was apprenticed at the age of 14 to a blacksmith who probably also did millwrighting work. He then worked as a journeyman mechanic at Stockton-on-Tees, where he had experience with machinery for a flax mill at Darlington. Trade in the Stockton area became slack in 1788 and Murray sought work in Leeds, where he was employed by John Marshall, who owned a flax mill at Adel, located about 5 miles (8 km) from Leeds. He soon became Marshall's chief mechanic, and when in 1790 a new mill was built in the Holbeck district of Leeds by Marshall and his partner Benyon, Murray was responsible for the installation of the machinery. At about this time he took out two patents relating to improvements in textile machinery.In 1795 he left Marshall's employment and, in partnership with David Wood (1761– 1820), established a general engineering and millwrighting business at Mill Green, Holbeck. In the following year the firm moved to a larger site at Water Lane, Holbeck, and additional capital was provided by two new partners, James Fenton (1754–1834) and William Lister (1796–1811). Lister was a sleeping partner and the firm was known as Fenton, Murray \& Wood and was organized so that Fenton kept the accounts, Wood was the administrator and took charge of the workshops, while Murray provided the technical expertise. The factory was extended in 1802 by the construction of a fitting shop of circular form, after which the establishment became known as the "Round Foundry".In addition to textile machinery, the firm soon began the manufacture of machine tools and steam-engines. In this field it became a serious rival to Boulton \& Watt, who privately acknowledged Murray's superior craftsmanship, particularly in foundry work, and resorted to some industrial espionage to discover details of his techniques. Murray obtained patents for improvements in steam engines in 1799, 1801 and 1802. These included automatic regulation of draught, a mechanical stoker and his short-D slide valve. The patent of 1801 was successfully opposed by Boulton \& Watt. An important contribution of Murray to the development of the steam engine was the use of a bedplate so that the engine became a compact, self-contained unit instead of separate components built into an en-gine-house.Murray was one of the first, if not the very first, to build machine tools for sale. However, this was not the case with the planing machine, which he is said to have invented to produce flat surfaces for his slide valves. Rather than being patented, this machine was kept secret, although it was apparently in use before 1814.In 1812 Murray was engaged by John Blenkinsop (1783–1831) to build locomotives for his rack railway from Middleton Colliery to Leeds (about 3 1/2 miles or 5.6 km). Murray was responsible for their design and they were fitted with two double-acting cylinders and cranks at right angles, an important step in the development of the steam locomotive. About six of these locomotives were built for the Middleton and other colliery railways and some were in use for over twenty years. Murray also supplied engines for many early steamboats. In addition, he built some hydraulic machinery and in 1814 patented a hydraulic press for baling cloth.Murray's son-in-law, Richard Jackson, later became a partner in the firm, which was then styled Fenton, Murray \& Jackson. The firm went out of business in 1843.[br]Principal Honours and DistinctionsSociety of Arts Gold Medal 1809 (for machine for hackling flax).Further ReadingL.T.C.Rolt, 1962, Great Engineers, London (contains a good short biography).E.Kilburn Scott (ed.), 1928, Matthew Murray, Pioneer Engineer, Leeds (a collection of essays and source material).C.F.Dendy Marshall, 1953, A History of Railway Locomotives Down to the End of theYear 1831, London.L.T.C.Rolt, 1965, Tools for the Job, London; repub. 1986 (provides information on Murray's machine-tool work).Some of Murray's correspondence with Simon Goodrich of the Admiralty has been published in Transactions of the Newcomen Society 3 (1922–3); 6(1925–6); 18(1937– 8); and 32 (1959–60).RTS -
122 Pratt, Francis Ashbury
[br]b. 15 February 1827 Woodstock, Vermont, USAd. 10 February 1902 Hartford, Connecticut, USA[br]American mechanical engineer and machine-tool manufacturer.[br]Francis A.Pratt served an apprenticeship as a machinist with Warren Aldrich, and on completing it in 1848 he entered the Gloucester Machine Works as a journeyman machinist. From 1852 to 1854 he worked at the Colt Armory in Hartford, Connecticut, where he met his future partner, Amos Whitney. He then became Superintendent of the Phoenix Iron Works, also at Hartford and run by George S.Lincoln \& Company. While there he designed the well-known "Lincoln" miller, which was first produced in 1855. This was a development of the milling machine built by Robbins \& Lawrence and designed by F.W. Howe, and incorporated a screw drive for the table instead of the rack and pinion used in the earlier machine.Whitney also moved to the Phoenix Iron Works, and in 1860 the two men started in a small way doing machine work on their own account. In 1862 they took a third partner, Monroe Stannard, and enlarged their workshop. The business continued to expand, but Pratt and Whitney remained at the Phoenix Iron Works until 1864 and in the following year they built their first new factory. The Pratt \& Whitney Company was incorporated in 1869 with a capital of $350,000, F.A.Pratt being elected President. The firm specialized in making machine tools and tools particularly for the armament industry. In the 1870s Pratt made no less than ten trips to Europe gaining orders for equipping armouries in many different countries. Pratt \& Whitney was one of the leading firms developing the system of interchangeable manufacture which led to the need to establish national standards of measurement. The Rogers-Bond Comparator, developed with the backing of Pratt \& Whitney, played an important part in the establishment of these standards, which formed the basis of the gauges of many various types made by the firm. Pratt remained President of the company until 1898, after which he served as their Consulting Engineer for a short time before retiring from professional life. He was granted a number of patents relating to machine tools. He was a founder member of the American Society of Mechanical Engineers in 1880 and was elected a vice-president in 1881. He was an alderman of the city of Hartford.[br]Principal Honours and DistinctionsVice-President, American Society of Mechanical Engineers 1881.Further ReadingJ.W.Roe, 1916, English and American Tool Builders, New Haven; reprinted 1926, New York, and 1987, Bradley, 111. (describes the origin and development of the Pratt \& Whitney Company).RTS -
123 Villard de Honnecourt
[br]b. c. 1200 Honnecourt-sur-Escaut, near Cambrai, Franced. mid-13th century (?) France[br]French architect-engineer.[br]Villard was one of the thirteenth-century architect-engineers who were responsible for the design and construction of the great Gothic cathedrals and other churches of the time. Their responsibilities covered all aspects of the work, including (in the spirit of the Roman architect Vitruvius) the invention and construction of mechanical devices. In their time, these men were highly esteemed and richly rewarded, although few of the inscriptions paying tribute to their achievements have survived. Villard stands out among them because a substantial part of his sketchbook has survived, in the form of thirty-three parchment sheets of drawings and notes, now kept in the Bibliothèque Nationale in Paris. Villard's professional career lasted roughly from 1225 to 1250. As a boy, he went to work on the building of the Cistercian monastery at Vaucelles, not far from Honnecourt, and afterwards he was apprenticed to the masons' lodge at Cambrai Cathedral, where he began copying the drawings and layouts on the tracing-house floor. All his drawings are, therefore, of the plans, elevations and sections of cathedrals. These buildings have long since been destroyed, but his drawings, perhaps among his earliest, bear witness to their architecture. He travelled widely in France and recorded features of the great works at Reims, Laon and Chartres. These include the complex system of passageways built into the fabric of a great cathedral; Villard comments that one of their purposes was "to allow circulation in case of fire".Villard was invited to Hungary and reached there c. 1235. He may have been responsible for the edifice dedicated to St Elizabeth of Hungary, canonized in 1235, at Kassa (now Košice, Slovakia). Villard probably returned to France c. 1240, at least before the Tartar invasion of Hungary in 1241.His sketchbook, which dates to c. 1235, stands as a memorial to Villard's skill as a draughtsman, a student of perspective and a mechanical engineer. He took his sketchbook with him on his travels, and used ideas from it in his work abroad. It contains architectural designs, geometrical constructions for use in building, surveying exercises and drawings for various kinds of mechanical devices, for civil or military use. He was transmitting details from the highly developed French Gothic masons to the relatively underdeveloped eastern countries. The notebooks were annotated for the use of pupils and other master masons, and the notes on geometry were obviously intended for pupils. The prize examples are the pages in the book, clearly Villard's own work, related to mechanical devices. Whilst he, like many others of the period and after, played with designs for perpetual-motion machines, he concentrated on useful devices. These included the first Western representation of a perpetualmotion machine, which at least displays a concern to derive a source of energy: this was a water-powered sawmill, with automatic feed of the timber into the mill. This has been described as the first industrial automatic power-machine to involve two motions, for it not only converts the rotary motion of the water-wheel to the reciprocating motion of the saw, but incorporates a means of keeping the log pressed against the saw. His other designs included water-wheels, watermills, the Archimedean screw and other curious devices.[br]BibliographyOf several facsimile reprints with notes there are Album de Villard de Honnecourt, 1858, ed. J.B.Lassus, Paris (repr. 1968, Paris: Laget), and The Sketchbook of Villard de Honnecourt, 1959, ed. T.Bowie, Bloomington: Indiana University Press.Further ReadingJ.Gimpel, 1977, "Villard de Honnecourt: architect and engineer", The Medieval Machine, London: Victor Gollancz, ch. 6, pp. 114–46.——1988, The Medieval Machine, the Industrial Revolution of the Middle Ages, London.R.Pernord, J.Gimpel and R.Delatouche, 1986, Le Moyen age pour quoi fayre, Paris.KM / LRD -
124 Whitworth, Sir Joseph
[br]b. 21 December 1803 Stockport, Cheshire, Englandd. 22 January 1887 Monte Carlo, Monaco[br]English mechanical engineer and pioneer of precision measurement.[br]Joseph Whitworth received his early education in a school kept by his father, but from the age of 12 he attended a school near Leeds. At 14 he joined his uncle's mill near Ambergate, Derbyshire, to learn the business of cotton spinning. In the four years he spent there he realized that he was more interested in the machinery than in managing a cotton mill. In 1821 he obtained employment as a mechanic with Crighton \& Co., Manchester. In 1825 he moved to London and worked for Henry Maudslay and later for the Holtzapffels and Joseph Clement. After these years spent gaining experience, he returned to Manchester in 1833 and set up in a small workshop under a sign "Joseph Whitworth, Tool Maker, from London".The business expanded steadily and the firm made machine tools of all types and other engineering products including steam engines. From 1834 Whitworth obtained many patents in the fields of machine tools, textile and knitting machinery and road-sweeping machines. By 1851 the company was generally regarded as the leading manufacturer of machine tools in the country. Whitworth was a pioneer of precise measurement and demonstrated the fundamental mode of producing a true plane by making surface plates in sets of three. He advocated the use of the decimal system and made use of limit gauges, and he established a standard screw thread which was adopted as the national standard. In 1853 Whitworth visited America as a member of a Royal Commission and reported on American industry. At the time of the Crimean War in 1854 he was asked to provide machinery for manufacturing rifles and this led him to design an improved rifle of his own. Although tests in 1857 showed this to be much superior to all others, it was not adopted by the War Office. Whitworth's experiments with small arms led on to the construction of big guns and projectiles. To improve the quality of the steel used for these guns, he subjected the molten metal to pressure during its solidification, this fluid-compressed steel being then known as "Whitworth steel".In 1868 Whitworth established thirty annual scholarships for engineering students. After his death his executors permanently endowed the Whitworth Scholarships and distributed his estate of nearly half a million pounds to various educational and charitable institutions. Whitworth was elected an Associate of the Institution of Civil Engineers in 1841 and a Member in 1848 and served on its Council for many years. He was elected a Member of the Institution of Mechanical Engineers in 1847, the year of its foundation.[br]Principal Honours and DistinctionsBaronet 1869. FRS 1857. President, Institution of Mechanical Engineers 1856, 1857 and 1866. Hon. LLD Trinity College, Dublin, 1863. Hon. DCL Oxford University 1868. Member of the Smeatonian Society of Civil Engineers 1864. Légion d'honneur 1868. Society of Arts Albert Medal 1868.Bibliography1858, Miscellaneous Papers on Mechanical Subjects, London; 1873, Miscellaneous Papers on Practical Subjects: Guns and Steel, London (both are collections of his papers to technical societies).1854, with G.Wallis, The Industry of the United States in Machinery, Manufactures, andUseful and Ornamental Arts, London.Further ReadingF.C.Lea, 1946, A Pioneer of Mechanical Engineering: Sir Joseph Whitworth, London (a short biographical account).A.E.Musson, 1963, "Joseph Whitworth: toolmaker and manufacturer", Engineering Heritage, Vol. 1, London, 124–9 (a short biography).D.J.Jeremy (ed.), 1984–6, Dictionary of Business Biography, Vol. 5, London, 797–802 (a short biography).W.Steeds, 1969, A History of Machine Tools 1700–1910, Oxford (describes Whitworth's machine tools).RTS -
125 جهاز
جِهَاز \ apparatus: (a piece of) special equipment: I have my own apparatus for printing photographs. appliance: a piece of equipment (esp. electrical or mechanical). device: a clever plan; any machine, instrument, or piece of equipment that is planned for a special purpose: Have you a device for separating the cream from milk?. gear: equipment: Sports gear. set: an instrument for receiving radio or television material. \ جِهَاز إرسال (لاسِلْكي) \ transmitter: a radio set that transmits sound; the opposite of a receiver. \ جِهَاز بَدْء تشغيل السيّارة \ starter: a device for starting the engine of a car. \ جِهَاز تَصْفِيَة \ strainer: a device for straining: a tea strainer. \ جِهَاز تَعْشيق التُّروس \ gear: a set of toothed wheels that changes the speed of a vehicle or machine without changing the speed of its engine: We change gear to drive up a hill. Cars have three or four forward gears. \ جِهَاز التِقَاط لاسِلْكي \ receiver: (in radio) a set that receives sound; the opposite of a transmitter. \ جِهَاز تهوية أو تجديد الهواء \ ventilator: a device for ventilating. \ جِهَاز الرّادار \ radar: a device that shows the position of ships and aircraft in the dark, so that others may guide or avoid them; it shows this by marks on a radio picture, as in television. \ جِهَاز طَبْخ \ stove: a device for cooking or heating: an oil stove; a gas stove; a camp stove. \ جِهَاز عَرض الصُّوَر \ projector: a machine with a strong light that shines through film or pictures so they are seen on a screen. \ جِهَاز القابِض أو تَعْشيق التُّروس (في السيارة) \ clutch: a device for separating a car engine from the moving parts that it works. \ جِهَاز قِياس \ meter: (often in compounds) an instrument for measuring the amount, speed or movement of sth. (electricity, water, a vehicle, etc.): The water meter shows that we used 2100 gallons last month. The speedometer showed that the car was travelling at 50 miles an hour. \ جِهَاز لاسِلْكي \ radio: an instrument for receiving sounds by electrical waves: We were listening to the radio. I was given a new radio (set) today. What is on the radio?. \ جِهَاز لإطْلاق الطائرة من على سطح سفينة \ catapult: a powerful apparatus of helping aircraft to take off from a ship. \ جِهَاز لِتَقْطير الكُحُول \ still: instruments for making strong alcoholic drink. \ جِهَاز للتدفِئة \ radiator: a device for heating a room (either electrically or by hot water passing through pipes). \ جِهَاز للتَّنفُّس تَحْتَ الماء \ aqualung: equipment for breathing under water when swimming. \ جِهَاز المُسافر \ kit: all the clothes and equipment that are needed for a special activity: camp kit; football kit. \ جِهَاز مُنَظِّم \ regulator: a device for controlling part of a machine. \ See Also مُعَدِّل \ جِهَاز نَقْل الحركة \ gear: a set of toothed wheels that changes the speed of a vehicle or machine without changing the speed of its engine: We change gear to drive up a hill. Cars have three of four forward gears. \ جِهَاز هاي فاي \ hi-fi: High Fidelity (very sensitive) apparatus for reproducing recorded sound: When you listen to my hi-fi (set), it’s like sitting in a concert hall!. \ جِهَاز وقَاية \ safeguard: a device, condition, quality etc. that protects against possible trouble: A lock is a safeguard against thieves. -
126 Cybernetics
1) The Parallel Nature of Feedback in Living Individuals and Communication MachinesIt is my thesis that the physical functioning of the living individual and the operation of some of the newer communication machines are precisely parallel in their analogous attempts to control entropy through feedback. Both of them have sensory receptors as one stage of their cycle of operation: that is, in both of them there exists a special apparatus for collecting information from the outer world at low energy levels, and for making it available in the operation of the individual or of the machine.In both cases these external messages are not taken neat, but through the internal transforming powers of the apparatus, whether it be alive or dead. The information is then turned into a new form available for the further stages of performance. In both the animal and the machine this performance is made to be effective on the outer world. In both of them, their performed action on the outer world, and not merely their intended action, is reported back to the central regulatory apparatus. (Wiener, 1954, pp. 26-27)[The job of the cyberneticist] is the study of information transfer: the converting of information from one form to another-the human voice into radio waves and back into sound once more, or a complex mathematical equation into a set of punched holes on a tape, to be fed into a computer and then into a set of traces on reels of magnetic tape in the computer's "memory store."... To him, protein synthesis is just such another case. The mechanism for ensuring the exact replication of a protein chain by a new cell is that of transferring the information about the protein structure from the parent to the daughter cell. (Rose, 1970, p. 162)The theme of all these tales [("Fisherman and the Jinni" in the Thousand Nights and a Night; The Sorcerer's Apprentice; and "The Monkey's Paw" by W. W. Jacobs)] is the danger of magic. This seems to lie in the fact that the operation of magic is singularly literal-minded, and that if it grants you anything at all it grants what you ask for, not what you should have asked for or what you intend....The magic of automation, and in particular the magic of an automatization in which the devices learn, may be expected to be similarly literal-minded. If you are playing a game according to certain rules and set the playing-machine to play for victory, you will get victory if you get anything at all, and the machine will not pay the slightest attention to any consideration except victory according to the rules. If you are playing a war game with a certain conventional interpretation of victory, victory will be the goal at any cost, even that of the extermination of your own side, unless this condition of survival is explicitly contained in the definition of victory according to which you program the machine. (Wiener, 1964, pp. 59-60)Historical dictionary of quotations in cognitive science > Cybernetics
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127 lavadora
f.washing machine.poner la lavadora to do some washing (in the machine)* * *1 washing machine* * *SF1) [de ropa] washing machinelavadora de carga frontal — front-loading washing machine, front-loader
lavadora de carga superior — top-loading washing machine, top-loader
2) And (=persona) laundress, washerwoman* * *femenino washing machine* * *= washing machine, washer.Ex. The study aims at establishing a common European basis for defining efficiency in domestic washing mahines, clothes driers and dishwashers.Ex. It is important not to underload or overload either your washer or dryer.----* carga de lavadora = washing load, load of washing.* lavadora-secadora = washer/dryer.* * *femenino washing machine* * *= washing machine, washer.Ex: The study aims at establishing a common European basis for defining efficiency in domestic washing mahines, clothes driers and dishwashers.
Ex: It is important not to underload or overload either your washer or dryer.* carga de lavadora = washing load, load of washing.* lavadora-secadora = washer/dryer.* * *washing machinelavadora de carga superior/frontal top-loading/front-loading washing machineCompuesto:lavadora de platos or trastes( Méx) dishwasher* * *
lavadora sustantivo femenino
washing machine
lavadora sustantivo femenino washing machine
' lavadora' also found in these entries:
Spanish:
descentrada
- descentrado
- fastidiar
- ruido
- tambor
- usada
- usado
- carga
- desagüe
- estropear
- malograr
English:
front-load
- washer
- washing machine
- cope
- machine
- washing
* * *lavadora nfwashing machine;poner la lavadora to do some washing (in the machine);al volver del viaje puso tres lavadoras when she came back from the trip she did three loads of washinglavadora secadora washer-dryer* * *f washing machine* * *lavadora nf: washing machine* * *lavadora n washing machine -
128 agitador
adj.rabble-rousing, rowdy, agitating, problem-making.m.1 stirring rod, agitator, shaker, stirrer.2 rioter, fomenter, firebrand, instigator.3 agitator, rabble-rouser, trouble-maker, troublemaker.* * *► nombre masculino,nombre femenino1 agitator1 QUÍMICA agitator————————1 QUÍMICA agitator* * *agitador, -a1.SM (Mec) agitator, shaker; (Culin) stirrer2.SM / F (Pol) agitator* * ** * *= shake mechanism, agitator, provocateur, troublemaker.Ex. The cylinder machine had no shake mechanism (the device which locked the fibres together in the Fourdrinier machine).Ex. It was similar to Dickinson's machine, but it had an agitator in the vat to prevent the fibres from being lined up parallel to each other by the action of the cylinder.Ex. The article is entitled 'Tomorrow's libraries: more than a telephone jack, less than a complete revolution; perspectives of a provocateur'.Ex. The employee must feel that any problem or complaint will be objectively heard and fairly resolved and that the supervisor will not hold it against the employee or consider him or her a troublemaker.* * ** * *= shake mechanism, agitator, provocateur, troublemaker.Ex: The cylinder machine had no shake mechanism (the device which locked the fibres together in the Fourdrinier machine).
Ex: It was similar to Dickinson's machine, but it had an agitator in the vat to prevent the fibres from being lined up parallel to each other by the action of the cylinder.Ex: The article is entitled 'Tomorrow's libraries: more than a telephone jack, less than a complete revolution; perspectives of a provocateur'.Ex: The employee must feel that any problem or complaint will be objectively heard and fairly resolved and that the supervisor will not hold it against the employee or consider him or her a troublemaker.* * *masculine, feminineA (provocador) agitatorB* * *
agitador
agitador,-ora
I adjetivo disruptive
II sustantivo masculino y femenino agitator
III m (para agitar) agitator
' agitador' also found in these entries:
Spanish:
agitadora
English:
agitator
- rabble-rouser
* * *agitador, -ora♦ nm,f[persona] agitator♦ nm[varilla] stirring rod; [para cóctel] swizzle-stick* * *m, agitadora f agitator* * *provocador: agitator
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