Barnes Wallis Barnes Wallis was born in Ripley, Derbyshire and educated at Christ's Hospital in Horsham, leaving school at seventeen to start work in January 1905 at Thames Engineering Works at Blackheath, southeast London. He subsequently changed his apprenticeship to J. Samuel White's, the shipbuilders based at Cowes on the Isle of Wight. Compaq Presario CQ57-218 Laptop Keyboard He originally trained as a marine engineer and in 1922 he took a degree in engineering via the University of London External Programme. He left J. Samuel White's in 1913 when an opportunity arose for him to work on airship design and then aircraft design. He worked for Vickers - later part of Vickers-Armstrongs and latterly part of the British Aircraft Corporation until his retirement in 1971.SONY VAIO VGN-FS215B Laptop Keyboard His many achievements include the first use of geodetic design in engineering and in the gasbag wiring of Vickers' R100 in 1930, which, at the time, was the largest airship ever designed. He also pioneered, along with John Edwin Temple, the use of light alloy and production engineering in the structural design of the R100. HP Envy 17-3001ed Laptop Keyboard Nevil Shute Norway was the chief calculator for the project, responsible for calculating the stresses on the frame. Despite a better-than-expected performance and a successful return flight to Canada in 1930, the R100 was broken up following the tragedy that befell its "sister" ship, the R101 (which was designed and built by a team from the Government's Air Ministry); the later crash of the Hindenburg led to the abandonment of airships as a mode of mass transport. SONY VAIO VGN-FS315B Laptop Keyboard By the time of the R101 crash, Wallis had moved to Vickers' aircraft division at the Brooklands motor circuit and aerodrome between Byfleet and Weybridge in Surrey. The pre-war aircraft designs of Rex Pierson, the Vickers Wellesley and the Vickers Wellington, both employed Wallis's geodetic design in the fuselage and wing structures. HP Pavilion dv6-2170sl Laptop Keyboard The latter was one of the most robust airframes ever developed, and pictures of its skeleton largely shot away, but still sound enough to bring its crew home safely, are still impressive. The geodetic construction offered a light and strong airframe (compared to conventional designs) with clearly defined space within for fuel tanks, payload etc. However the technique was not easily transferred to other aircraft manufacturers nor was Vickers able to build other designs in factories tooled for geodetic work. SONY VAIO VGN-AR520E Laptop Keyboard After the outbreak of the Second World War in Europe in 1939, Wallis saw a need for strategic bombing to destroy the enemy's ability to wage war and he wrote a paper entitled "A Note on a Method of Attacking the Axis Powers". Referring to the enemy's power supplies he wrote (as Axiom 3): "If their destruction or paralysis can be accomplished they offer a means of rendering the enemy utterly incapable of continuing to prosecute the war". ACER TravelMate 3230 Series Laptop Keyboard As a means to do this he proposed huge bombs that could concentrate their force and destroy targets which were otherwise unlikely to be affected. Wallis's first super-large bomb design came out at some ten tonnes, far larger than any current plane could carry. This led him to suggest a plane that could carry it, the "Victory Bomber", rather than drop the idea. Packard Bell Easynote TM80 Laptop Keyboard Early in 1942, Wallis began experimenting with skipping marbles over water tanks in his garden, leading to his April 1942 paper "Spherical Bomb — Surface Torpedo". The idea was that a bomb could skip over the surface of water (avoiding torpedo nets) and sink directly next to a battleship or dam wall as a depth charge, HP Mini CQ10-101SA Laptop Keyboard with the surrounding water concentrating the force of the explosion on the target. A crucial innovation was the addition of backspin, which caused the bomb to trail behind the dropping aircraft (decreasing the chance of the aircraft being downed by the force of the explosion below), increased the range of the bomb, and also prevented it from moving away from the target wall as it sank. HP Envy 17-2199el Laptop Keyboard After some initial scepticism, the Air Force accepted Wallis's bouncing bomb for attacks on the Möhne, Eder, and Sorpe dams in the Ruhr area. The raid on these dams in May 1943 (Operation Chastise) was immortalised in Paul Brickhill's 1951 book The Dam Busters and the 1955 film of the same name. The Mohne and Eder dams were successfully breached causing damage to German factories and disrupting hydro-electric power. HP G62-140EL Laptop Keyboard After the success of the bouncing bomb, Wallis was able to return to his huge bombs, producing first the Tallboy (6 tonnes) and then Grand Slam (10 tonnes) deep-penetration earthquake bombs. These were not the same as the 5-tonne "blockbuster" bomb, which was a conventional blast bomb. SONY VAIO VGN-FS515E Laptop Keyboard Although there was still no aircraft capable of lifting these bombs to their optimal release altitude, these two bombs could still be dropped from a lower altitude, entering the earth at supersonic speed and penetrating to a depth of 20 metres before exploding. They were used on strategic German targets such as V-2 rocket launch sites, submarine pens, Packard Bell Easynote TK37 Laptop Keyboard and other reinforced structures, large civil constructions such as viaducts and bridges, as well as the German battleship Tirpitz. They were the forerunners of modern bunker-busting bombs. Having been dispersed with the Design Office from Brooklands to the nearby Burhill Golf Club in Hersham, a few minutes up the road from his house in Hersham, Gateway EC18 Laptop Keyboard after the Vickers factory was badly bombed in September 1940, Wallis returned to Brooklands in November 1945 as Head of the Vickers-Armstrongs Research & Development Department and was based in the former motor circuit’s 1907 Clubhouse. Here he and his staff worked on many futuristic aerospace projects including supersonic flight and ‘swing-wing’ technology (later used in Tornado and other aircraft types). SONY Vaio VGN-AW390 Laptop Keyboard A massive 19,533sq ft Stratosphere Chamber (which was the world's largest facility of its type and still survives at Brooklands Museum) was designed and built beside the Clubhouse by 1948 and became the focus for much R&D work under Wallis’s direction in the 1950s and 1960s. TOSHIBA Satellite L40-18Z Laptop Keyboard Though he did not invent the concept, Wallis did much pioneering engineering work to make the swing-wing concept functional. However, despite very promising wind tunnel and model work, his designs were not adopted. His early "Wild Goose", designed in the late 1940s, was intended to use laminar flow, but when this was shown to be unworkable, SONY VAIO VGN-NR21Z/S Laptop Keyboard he developed the swing-wing further for the "Swallow", designed in the mid-1950s, which could have been developed for either military or civil applications. Both Wild Goose and Swallow were demonstrated by large (30 ft span) flying scale models without tailplanes; these trials were based at Predannack in Cornwall. Swallow was cancelled in the round of cuts following the Sandys Defence White Paper in 1957, HP Mini 210-2006sa Laptop Keyboard and in an attempt to gain US roadto continue the work, details of the project were passed to the USA. No funds for the work were forthcoming from the USA, and Wallis's design ideas were passed over in the UK in favour of the BAC TSR-2 (on which one of Wallis's sons worked) and Concorde. Wallis was quite critical of both the TSR-2 and Concorde, TOSHIBA Satellite U305-S7467 Laptop Keyboard stating that a swing-wing design would be more appropriate. In the mid-1960s, TSR-2 was ignominiously scrapped in favour of the American F-111 – which had swing wings based on Wallis's work which the Americans had received – though this order was also subsequently cancelled. COMPAQ Presario CQ60-300EV Laptop Keyboard In the 1950s, Wallis developed an experimental rocket-propelled torpedo codename HEYDAY. It was powered by compressed air and hydrogen peroxide. Tests were conducted from Portland Breakwater in Dorset. The unusual shape was designed to maintain laminar flow over much of its length. The only surviving example is on display in Explosion! Museum of Naval Firepower at Gosport. HP 403809-001 Laptop Keyboard In 1955 Wallis agreed to act as a consultant to the project to build the Parkes Radio Telescope in Australia. Some of the ideas he suggested are the same as or closely related to the final design, including idea of supporting the dish at its centre, the geodetic structure of the dish, and the master equatorial control system. Unhappy with the direction it had taken, Wallis left the project halfway into the design study and refused to accept his £1000 consultant's fee. APPLE A1181 Laptop Keyboard In the 1960s, Wallis also proposed using large cargo submarines to transport oil and other goods, thus avoiding surface weather conditions. Moreover, Wallis's calculations indicated, the power requirements for an underwater vessel are lower than for a comparable conventional ship and they can be made to travel at a much higher speed.APPLE Macbook 13 Inch Laptop Keyboard He also proposed a novel hull structure which would have allowed greater depths to be reached, and the use of gas turbine engines in a submarine, using liquid oxygen. In the end, nothing came of Wallis's submarine ideas. During the 1960s and into his retirement, he developed ideas for an "all-speed" aircraft, capable of efficient flight at all speed ranges from subsonic to hypersonic. HP Pavilion dv6-3002xx Laptop Keyboard The story described in The Dam Busters reflected the difficulties Wallis often faced in persuading those in authority or who controlled funding sources to support his ideas. Following the terrible death toll of the aircrews involved in the Dambusters raid, he made a conscious effort never again to endanger the lives of his test pilots. His designs were extensively tested in model form, and consequently he became a pioneer in the remote control of aircraft. SONY VAIO PCG-FR315M Laptop Keyboard Wallis became a Fellow of the Royal Society in 1945 and was knighted in 1968. He was awarded the sum of £10,000 for his war work from the Royal Commission on Awards to Inventors. Such was his grief at the loss of so many airmen in the dams raid, Wallis donated the entire sum to Christ's Hospital School in 1951 to allow them to set up the RAF Foundationers' Trust, which allows the children of RAF personnel killed or injured in action to attend the school.SONY laptop keyboard In April 1922, Wallis met his cousin-in-law, Molly Bloxam, at a family tea party. She was only 17 and he was 35, and her father forbade them from courting. However, he allowed Wallis to assist Molly with her mathematics courses by correspondence, and they wrote some 250 letters, enlivening them with fictional characters such as "Duke Delta X". The letters gradually became personal, and Wallis proposed marriage on her 20th birthday. They married on 23 April 1925, and were married for 54 years until his death in 1979. ACER TravelMate 242LC Laptop Keyboard He lived with his family in Effingham, Surrey, for 49 years from 1930 until his death in 1979. They had four children - Barnes (1924-2008), Mary (b. 1927), Elisabeth (b. 1933) and Christopher (1935-2006) - and also adopted Molly's sister's children when their parents were killed in an air raid. His daughter Mary Eyre Wallis later married Harry Stopes-Roe, a son of Marie Stopes.SONY VAIO VGN-FS485B Laptop Keyboard HP G61-110SA Laptop Keyboard His son Christopher Loudon Wallis was instrumental in the restoration of the watermill and its building on the Stanway Estate near Cheltenham, Gloucestershire.
The Ruhr, by German-speaking geographers and historians more accurately called the Ruhr district, Ruhr region or Ruhr valley (German Ruhrgebiet, colloquial Ruhrpott, Kohlenpott, Pott or Revier), is an urban area in North Rhine-Westphalia, Germany. With a population density of 2,800/km² and a population of some 7.3 million, ACER Aspire 5810T Laptop Keyboard it is the largest urban agglomeration in Germany. It consists of several large, formerly industrial cities bordered by the rivers Ruhr to the south, Rhine to the west, and Lippe to the north. In the Southwest it borders the Bergisches Land. It is considered part of the larger Rhine-Ruhr metropolitan region of more than 12 million people. SONY VAIO VGN-FS215Z Laptop Keyboard From west to east, the region includes the cities of Duisburg, Oberhausen, Bottrop, Mülheim an der Ruhr, Essen, Gelsenkirchen, Bochum, Herne, Hagen, Dortmund, and Hamm, as well as parts of the more "rural" districts of Wesel, Recklinghausen, Unna and Ennepe-Ruhr-Kreis. Historically, the western Ruhr towns, such as Duisburg and Essen, belonged to the historic region of the Rhineland, whereas the eastern part of the Ruhr, Lenovo 45N2106 Laptop Keyboard including Gelsenkirchen, Bochum, Dortmund and Hamm, were part of the region of Westphalia. Since the 19th century, these districts have grown together into a large complex with a vast industrial landscape, inhabited by some 7.3 million people (including Düsseldorf and Wuppertal). It is the fifth largest urban area in Europe after Istanbul, Moscow, London and Paris. DELL Inspiron N4050 Laptop Keyboard HP 441426-001 Laptop Keyboard Geologically, the region is defined by coal-bearing layers from the upper Carboniferous period. The coal seams reach the surface in a strip along the River Ruhr and dip downward from the river to the north. Beneath the River Lippe, the coal seams lie at a depth of 600 to 800 metres (2,000 to 2,600 feet). The thickness of the coal layers ranges from one to three metres (three to ten feet). This geological feature played a decisive role in the development of coal mining in the Ruhr. TOSHIBA Satellite A305 Laptop Keyboard The urban landscape of the Ruhr extends from the Lower Rhine Basin east to the Westphalian Plain and south to the hills of the Rhenish Massif. Through the centre of the Ruhr runs a segment of the loess belt that extends across Germany from west to east. Historically, this loess belt has underlain some of Germany's richest agricultural regions. DELL Inspiron N4050 Laptop Keyboard According to the Regionalverband Ruhr (RVR, Ruhr Regional Association), 37.6% of the region's area is built up. A total of 40.7% of the region's land remains in agricultural use. Forests account for 17.6%, and bodies of water and other types of land use occupy the rest. The inclusion of four mainly rural districts in the otherwise mainly industrial Ruhr helps to explain the large proportion of agricultural and forested land. In addition, the city boroughs of the Ruhr region have outlying districts with a rural character. HP 441426-001 Laptop Keyboard Seen on a map, the Ruhr could be considered a single city, since—at least in the north-south dimension—there are no visible breaks between the individual city boroughs. Thus the Ruhr is described as a polycentric urban area, which shares a similar history of urban and economic TOSHIBA Satellite A305 Laptop Keyboard development. Because of its history, the Ruhr is structured differently from monocentric urban regions such as Berlin and London, which developed through the rapid merger of smaller towns and villages with a growing central city. Instead, the individual city boroughs and urban districts of the Ruhr grew independently of one another during the Industrial Revolution. SONY VAIO VGN-C2S Series Laptop Keyboard While large European cities typically have population densities of up to 20,000 inhabitants per square kilometre (about 50,000 per square mile), the population density of the central Ruhr—only about 2,100 inhabitants per square kilometre (about 5,400 per square mile)—is low compared to other German cities. HP 416039-001 Laptop Keyboard Between the constituent urban areas are relatively open suburbs and some open land with agricultural fields. In some places, the borders between cities in the central Ruhr are unrecognizable due to continuous development across them. FUJITSU Lifebook E8310 Laptop Keyboard Replanting of brownfield land has created new parks and recreation areas. The Emscher Landschaftspark (Emscher Landscape Park) lies along the River Emscher, formerly virtually an open sewer, parts of which have undergone natural restoration. This park connects strips of parkland running from north to south, which were developed through regional planning in the 1920s, to form a green belt between the Ruhr cities from east to west. TOSHIBA Satellite L300 Laptop Keyboard
Historical development of the term "Ruhr"
The 1911 edition of Encyclopaedia Britannica has only one definition of "Ruhr": "a river of Germany, an important right-bank tributary of the lower Rhine." The use of the term "Ruhr" for the industrial region started in Britain only after World War I, when French and Belgian troops had occupied the Ruhr district and seized its prime industrial assets in lieu of unpaid reparations in 1923. SONY Vaio PCG-K215S Laptop Keyboard In 1920, the International Labour Office published a report entitled "Coal Production in the Ruhr District". In 1923, the Canadian Commercial Intelligence Journal, Volume 28, Issue 1013, includes the article, "Exports from the Ruhr district of Germany". In 1924 the English and American press was still talking of the "French occupation of the Ruhr Valley" or "Ruhr District". SONY VAIO PCG-FR315M Laptop Keyboard A 62-page publication seems to be responsible for the use of "Ruhr" as a short form of the then more common "Ruhr District" or "Ruhr Valley": Ben Tillett, A. Creech-Jones and Samuel Warren's The Ruhr: The Report of a Deputation from the Transport and General Workers Union (London 1923). Yet "The report of a deputation from the Transport and General Workers' Union which spent a fortnight examining the problems in the Ruhr Valley",HP 640436-001 Laptop Keyboard published in The Economic Review, Volume 8, 1923, is still using the traditional term. In the same year, "Objections by the United States to discriminatory regulations on exports from the occupied region of the Ruhr" was published in Papers Relating to the Foreign Relations of the United States. ACER Aspire 5742 Laptop Keyboard The 1926 Encyclopaedia Britannica, in addition to its article on the river Ruhr, has a further article on "RUHR, the name given to a district of Westphalia, Germany." Thus the name "Ruhr" was given to the region (as a short form of "Ruhr District" or "Ruhr Valley") only a few years before the publication of this edition of the Encyclopaedia Britannica. Even after World War II, HP 550 Laptop Keyboard the term "Ruhr" may not have been in general use for the region: it was defined in Documents on American Foreign Relations (1948): "For the purposes of the present Agreement: (i) the expression 'Ruhr' means the areas, as presently constituted, in Land North Rhine–Westphalia, listed in the Annex to this Agreement."HP Envy 15 Laptop Keyboard However, Lawrence K. Cecil and Philip Hauge Abelson still write in 1967: "In the first place, the average person uses the term 'Ruhr' indiscriminately as the Ruhr River or the Ruhr district, two entirely different things. The Ruhr River is only one of half a dozen rivers in the Ruhr district, in addition to the Rhine. TOSHIBA NSK-TBD01 Laptop Keyboard The Rhine itself runs through the heart of the Ruhr district." According to Merriam Webster's Geographical Dictionary, a standard reference on place names around the world, the name "Ruhr" refers to the river. The name preferred for the region in this dictionary is "Ruhrgebiet", followed by "Ruhr Valley".Compaq Presario CQ57 Series Laptop Keyboard The development of the region into an urbanized industrial area started in the late 18th century with the early industrialisation in the nearby Wupper Valley in the Bergisches Land. By around 1820, hundreds of water-powered mills were producing textiles, lumber, shingles and iron in automated processes here. DELL Inspiron 6400 Laptop Keyboard And in even more workshops in the hills, highly skilled workers manufactured knives, tools, weapons and harnesses, using water, coal and charcoal. History has no established name for this phase of the industrial revolution, but one could call it the early waterpowered industrial revolution. DELL Latitude D830 Laptop Keyboard As the machines became bigger and moved from water power to steam power, locally mined coal and charcoal became expensive and there was not enough of it. The Bergische industry ordered more and more coal from the new coal mining area along the Ruhr river. Impressive and expensive railways were constructed through the hilly Wupper region, to bring coal, and later steel, in from the Ruhr, and for outward transport of finished products.HP AELX9U00210 Laptop Keyboard By 1850, there were almost 300 coal mines in operation in the Ruhr area, in and around the central cities of Duisburg, Essen, Bochum and Dortmund. The coal was exported or processed in coking ovens into coke, used in blast furnaces, producing iron and steel. In this period the name Ruhrgebiet became common. Before the coal deposits along the Ruhr were exhausted, Lenovo 45N2106 Laptop Keyboard the mining industry moved northward to the Emscher and finally to the Lippe, drilling ever deeper mines as it went. Locks built at Mülheim on the Ruhr led to the expansion of Mülheim as a port. With the construction of the Cologne-Minden railway in the late 19th century, several iron works were built within the borders of the present-day city of Oberhausen. HP G61-400SP Laptop Keyboard The population climbed rapidly. Towns with only 2000 to 5000 people in the early 19th century grew in the following 100 years to over 100,000. Skilled mineworkers were recruited from other regions to the Ruhr's mines and steel mills and unskilled people started to move in. From 1860 onwards there was large-scale migration from Silesia, TOSHIBA Satellite L355 Laptop Keyboard Pomerania, East Prussia and Posen to the Ruhr. Most of them were Polish speakers and they were treated as second class citizens. In 1899 this led to a revolt in Herne of young Polish workers, who later established a Workers' Union. Skilled workers in the mines were often housed in so-called "miners' colonies", built by the mining firms. By the end of the Prussian Kingdom in 1870, over 3 million people lived in the Ruhrgebiet and the new coal-mining district had become the largest industrial region of Europe. DELL Latitude D620 Laptop Keyboard During World War I the Ruhrgebiet functioned as Germany's central weapon factory. At a big Essen company the number of employees rose from 40,000 to 120,000 in four years. They were partly women, partly forced labourers. ACER Aspire 5742 Laptop Keyboard In March 1921, French and Belgian troops occupied Duisburg, which under the Treaty of Versailles formed part of the demilitarized Rhineland. In January 1923 the whole Ruhrgebiet was occupied as a reprisal after Germany failed to fulfill World War I reparation payments as agreed in the Versailles Treaty. HP G42-359TU Laptop Keyboard The German government responded with "passive resistance", letting workers and civil servants refuse orders and instructions by the occupation forces. Production and transport came to a standstill and the financial consequences contributed to German hyperinflation and ruined public finances in Germany. Passive resistance was called off in late 1923, HP G42-466LA Laptop Keyboard allowing Germany to implement a currency reform and to negotiate the Dawes Plan, which led to the withdrawal of French and Belgian troops from the Ruhr in 1925. During World War II, the bombing of the Ruhr in 1940-44 caused a loss of 30% of plant and equipment (compared to 15–20% for German industry as a whole). A second battle of the Ruhr (6/7 October 1944–end of 1944) is claimed to have begun with an attack on Dortmund.[verification needed] In addition to the strategic bombing of the Ruhr, in April 1945, the Allies trapped several hundred thousand Wehrmacht troops in the Ruhr Pocket. HP AELX6U00210 Laptop Keyboard After the war, the Level of Industry plans for Germany abolished all German munitions factories and civilian industries that could support them and severely restricted civilian industries of military potential. The French Monnet Plan pushed for an internationalization of the area, and the subsequent Ruhr Agreement was imposed as a condition for the establishment of the Federal Republic of Germany.SONY VAIO VGN-NW11S/S Laptop Keyboard During the Cold War, the Western allies anticipated that any Red Army thrust into Western Europe would begin in the Fulda Gap and have the Ruhr as a primary target. Increased German control of the area was limited by the pooling of German coal and steel into the multinational European Coal and Steel Community in 1951. Compaq Presario CQ57 Series Laptop Keyboard The nearby Saar region, containing much of Germany's remaining coal deposits, was handed over to economic administration by France as a protectorate in 1947 and did not politically return to Germany until January 1957, with economic reintegration occurring two years later. Parallel to the question of political control of the Ruhr, TOSHIBA Satellite L555-S7929 Laptop Keyboard the Allies tried to decrease German industrial potential by limitations on production and dismantling of factories and steel plants, predominantly in the Ruhr. By 1950, after the virtual completion of the by-then much watered-down "level of industry" plans, equipment had been removed from 706 manufacturing plants in the west, and steel production capacity had been reduced by 6.7 million tons. Dismantling finally ended in 1951. In all, less than 5% of the industrial base was dismantled.SONY VAIO PCG-FR315M Laptop Keyboard The Ruhr was at the center of the German economic miracle of the 1950s and 1960s, as very rapid economic growth (9% a year) created a heavy demand for coal and steel. DELL 9Z.N3H82.001 Laptop Keyboard After 1973, Germany was hard hit by a worldwide economic crisis, soaring oil prices, and increasing unemployment, which jumped from 300,000 in 1973 to 1.1 million in 1975. The Ruhr region was hardest hit, as the easy-to-reach coal mines became exhausted, and German coal was no longer competitive. SONY VAIO VGN-AW31S Laptop Keyboard Likewise the Ruhr steel industry went into sharp decline, as its prices were undercut by lower-cost suppliers such as Japan. The welfare system provided a safety net for the large number of unemployed workers, and many factories reduced their labor force and began to concentrate on high-profit specialty items.HP 605344-001 Laptop Keyboard As demand for coal decreased after 1958, the area went through phases of structural crisis (see steel crisis) and industrial diversification, first developing traditional heavy industry, then moving into service industries and high technology. The air and water pollution of the area are largely a thing of the past although some issues take a long time to solve. In 2005, Essen was the official candidate for nomination as European Capital of Culture for 2010. TOSHIBA Satellite L755D-SP5165RM Laptop Keyboard The local dialect of German is commonly called Ruhrdeutsch or Ruhrpottdeutsch, although there is really no uniform dialect that justifies designation as a single dialect. It is rather a working class sociolect with influences from the various dialects found in the area and changing even with the professions of the workers. SONY VAIO VGN-AW170YIQ Laptop Keyboard A major common influence stems from the coal mining tradition of the area. For example, quite a few locals prefer to call the Ruhr either "Kohlenpott", where "Pott" is a derivate of "Pütt" (pitmen's term for mine; cp. the English "pit"), or "Revier".Compaq Presario CQ71-420ER Laptop Keyboard During the 19th century the Ruhr attracted up to 500,000 ethnic Poles, Masurians and Silesians from East Prussia and Silesia in a migration known as Ostflucht (flight from the east). By 1925, the Ruhrgebiet had around 3.8 million inhabitants. Most of the new inhabitants came from Eastern Europe, but immigrants also came from France, HP G42-381TX Laptop Keyboard Ireland, and the United Kingdom. It has been claimed that immigrants came to the Ruhr from over 140 different nations. Almost all their descendants today speak German as a mother tongue, and for various reasons they do not identify with their Polish roots and traditions, often only their Polish family names remaining as a sign of their past. Compaq Presario CQ71-420ER Laptop Keyboard The Industrial Revolution was a period from 1750 to 1850 where changes in agriculture, manufacturing, mining, transportation, and technology had a profound effect on the social, economic and cultural conditions of the times. It began in the United Kingdom, then subsequently spread throughout Western Europe, North America, Japan, and eventually the rest of the world. Lenovo Thinkpad T420 Laptop Keyboard The Industrial Revolution marks a major turning point in history; almost every aspect of daily life was influenced in some way. Most notably, average income and population began to exhibit unprecedented sustained growth. In the two centuries following 1800, the world's average per capita income increased over tenfold, APPLE MacBook pro 13 inch Laptop Keyboard while the world's population increased over sixfold. In the words of Nobel Prize winner Robert E. Lucas, Jr., "For the first time in history, the living standards of the masses of ordinary people have begun to undergo sustained growth ... Nothing remotely like this economic behavior has happened before".DELL Inspiron 1420 Laptop Keyboard Great Britain provided the legal and cultural foundations that enabled entrepreneurs to pioneer the industrial revolution. Key factors fostering this environment were: (1) The period of peace and stability which followed the unification of England and Scotland, (2) no trade barriers between England and Scotland, (3) the rule of law (respecting the sanctity of contracts), (4) a straightforward legal system which allowed the formation of joint-stock companies (corporations), and (5) a free market (capitalism).DELL Inspiron 1520 Laptop Keyboard Starting in the later part of the 18th century, there began a transition in parts of Great Britain's previously manual labour and draft-animal–based economy towards machine-based manufacturing. It started with the mechanisation of the textile industries, the development of iron-making techniques and the increased use of refined coal. HP Pavilion dv6-3122tx Laptop Keyboard Trade expansion was enabled by the introduction of canals, improved roads and railways. With the transition away from an agricultural-based economy and towards machine-based manufacturing came a great influx of population from the countryside and into the towns and cities, which swelled in population.Lenovo ThinkPad Edge E525 Laptop Keyboard The critical manufacturing change that marks the Industrial Revolution is the production of interchangeable parts. Lathes and other machine tools of the Industrial Revolution enabled (1) high precision, and (2) the mass reproduction of parts with that precision. Guns, for example, had previously been made one at a time, DELL Latitude D620 Laptop Keyboard with the parts filed to mate together accurately on one gun, but they were not made to mate with any other gun. With the repeatable precision of the Industrial Revolution, interchangeable parts for guns or other products could be produced on a mass basis, which dramatically reduced the price of the product. Lenovo 45N2106 Laptop Keyboard The introduction of steam power fuelled primarily by coal, wider utilisation of water wheels and powered machinery (mainly in textile manufacturing) underpinned the dramatic increases in production capacity. The development of all-metal machine tools in the first two decades of the 19th century facilitated the manufacture of more production machines for manufacturing in other industries. ASUS X53S Laptop Keyboard The effects spread throughout Western Europe and North America during the 19th century, eventually affecting most of the world, a process that continues as industrialisation. The impact of this change on society was enormous. SONY VAIO VGN-FS315B Laptop Keyboard The First Industrial Revolution, which began in the 18th century, merged into the Second Industrial Revolution around 1850, when technological and economic progress gained momentum with the development of steam-powered ships, railways, and later in the 19th century with the internal combustion engine and electrical power generation. TOSHIBA Satellite L755-S5364 Laptop Keyboard The period of time covered by the Industrial Revolution varies with different historians. Eric Hobsbawm held that it 'broke out' in Britain in the 1780s and was not fully felt until the 1830s or 1840s, while T. S. Ashton held that it occurred roughly between 1760 and 1830.HP pavilion DV7-1000 Laptop Keyboard Some 20th-century historians such as John Clapham and Nicholas Crafts have argued that the process of economic and social change took place gradually and the term revolution is a misnomer. This is still a subject of debate among historians. GDP per capita was broadly stable before the Industrial Revolution and the emergence of the modern capitalist economy. HP 640892-001 Laptop Keyboard The Industrial Revolution began an era of per-capita economic growth in capitalist economies. Economic historians are in agreement that the onset of the Industrial Revolution is the most important event in the history of humanity since the domestication of animals and plants. ACER Aspire 5742 Laptop Keyboard The earliest use of the term "Industrial Revolution" seems to be a letter of 6 July 1799 by French envoy Louis-Guillaume Otto, announcing that France had entered the race to industrialise. In his 1976 book Keywords: A Vocabulary of Culture and Society, Raymond Williams states in the entry for "Industry": HP G42-415DX Laptop Keyboard "The idea of a new social order based on major industrial change was clear in Southey and Owen, between 1811 and 1818, and was implicit as early as Blake in the early 1790s and Wordsworth at the turn of the century." The term Industrial Revolution applied to technological change was becoming more common by the late 1830s, HP 605344-001 Laptop Keyboard as in Louis-Auguste Blanqui description in 1837 of la révolution industrielle. Friedrich Engels in The Condition of the Working Class in England in 1844 spoke of "an industrial revolution, a revolution which at the same time changed the whole of civil society". Credit for popularising the term may be given to Arnold Toynbee, whose lectures given in 1881 gave a detailed account of it. SAMSUNG NP-N150-JP01 Laptop Keyboard These represent three 'leading sectors', in which there were key innovations, which allowed the economic take off by which the Industrial Revolution is usually defined. This is not to belittle many other inventions, particularly in the textile industry. Without some earlier ones, such as the spinning jenny and flying shuttle in the textile industry and the smelting of pig iron with coke, SONY 147977821 Laptop Keyboard HP 643263-001 Laptop Keyboard these achievements might have been impossible. Later inventions such as the power loom and Richard Trevithick's high pressure steam engine were also important in the growing industrialisation of Britain. The application of steam engines to powering cotton mills and ironworks enabled these to be built in places that were most convenient because other resources were available, rather than where there was water to power a watermill. SONY VAIO VGN-NR11Z/S Laptop Keyboard In the textile sector, such mills became the model for the organisation of human labour in factories, epitomised by Cottonopolis, the name given to the vast collection of cotton mills, factories and administration offices based in Manchester. The assembly line system greatly improved efficiency, both in this and other industries. With a series of men trained to do a single task on a product, then having it moved along to the next worker, the number of finished goods also rose significantly. ACER Aspire 5930 Laptop Keyboard Also important was the 1756 rediscovery of concrete (based on hydraulic lime mortar) by the British engineer John Smeaton, which had been lost for 1300 years. ACER Aspire 5315 Laptop Keyboard Knowledge of innovation was spread by several means. Workers who were trained in the technique might move to another employer or might be poached. A common method was for someone to make a study tour, gathering information where he could. During the whole of the Industrial Revolution and for the century before, HP 640892-001 Laptop Keyboard all European countries and America engaged in study-touring; some nations, like Sweden and France, even trained civil servants or technicians to undertake it as a matter of state policy. In other countries, notably Britain and America, this practice was carried out by individual manufacturers eager to improve their own methods. TOSHIBA Satellite L300-13R Laptop Keyboard Study tours were common then, as now, as was the keeping of travel diaries. Records made by industrialists and technicians of the period are an incomparable source of information about their methods. ACER Aspire 2920-3A2G12Mi Laptop Keyboard Another means for the spread of innovation was by the network of informal philosophical societies, like the Lunar Society of Birmingham, in which members met to discuss 'natural philosophy' (i.e. science) and often its application to manufacturing. The Lunar Society flourished from 1765 to 1809, and it has been said of them, "LENOVO IdeaPad G460 Laptop Keyboard They were, if you like, the revolutionary committee of that most far reaching of all the eighteenth century revolutions, the Industrial Revolution". Other such societies published volumes of proceedings and transactions. For example, the London-based Royal Society of Arts published an illustrated volume of new inventions, as well as papers about them in its annual Transactions. ACER Aspire 7735Z Laptop Keyboard There were publications describing technology. Encyclopaedias such as Harris's Lexicon Technicum (1704) and Abraham Rees's Cyclopaedia (1802–1819) contain much of value. Cyclopaedia contains an enormous amount of information about the science and technology of the first half of the Industrial Revolution, IBM Lenovo ThinkPad R52-1860 Laptop Keyboard very well illustrated by fine engravings. Foreign printed sources such as the Descriptions des Arts et Métiers and Diderot's Encyclopédie explained foreign methods with fine engraved plates. SAMSUNG NB30 Laptop Keyboard Periodical publications about manufacturing and technology began to appear in the last decade of the 18th century, and many regularly included notice of the latest patents. Foreign periodicals, such as the Annales des Mines, published accounts of travels made by French engineers who observed British methods on study tours. HP 540 Laptop Keyboard In the early 18th century, British textile manufacture was based on wool which was processed by individual artisans, doing the spinning and weaving on their own premises. This system is called a cottage industry. Flax and cotton were also used for fine materials, but the processing was difficult because of the pre-processing needed, and thus goods in these materials made only a small proportion of the output. TOSHIBA Satellite pro 4600 Laptop Keyboard Use of the spinning wheel and hand loom restricted the production capacity of the industry, but incremental advances increased productivity to the extent that manufactured cotton goods became the dominant British export by the early decades of the 19th century. India was displaced as the premier supplier of cotton goods. FUJITSU Amilo Mini Ui 3520 Laptop Keyboard Lewis Paul patented the Roller Spinning machine and the flyer-and-bobbin system for drawing wool to a more even thickness, developed with the help of John Wyatt in Birmingham. Paul and Wyatt opened a mill in Birmingham which used their new rolling machine powered by a donkey. In 1743, HP Pavilion dv5-1211ea Laptop Keyboard a factory was opened in Northampton with fifty spindles on each of five of Paul and Wyatt's machines. This operated until about 1764. A similar mill was built by Daniel Bourn in Leominster, but this burnt down. Both Lewis Paul and Daniel Bourn patented carding machines in 1748. Using two sets of rollers that travelled at different speeds, it was later used in the first cotton spinning mill. HP G62-b25SA Laptop Keyboard Lewis's invention was later developed and improved by Richard Arkwright in his water frame and Samuel Crompton in his spinning mule. In 1764, James Hargreaves invented the spinning jenny, the first practical spinning frame with multiple spindles, in the village of Stanhill, Lancashire.SONY VAIO VGN-FS215Z Laptop Keyboard Other inventors increased the efficiency of the individual steps of spinning (carding, twisting and spinning, and rolling) so that the supply of yarn increased greatly, which fed a weaving industry that was advancing with improvements to shuttles and the loom or 'frame'. The output of an individual labourer increased dramatically, with the effect that the new machines were seen as a threat to employment, and early innovators were attacked and their inventions destroyed. SONY VAIO VGN-FS485B Laptop Keyboard To capitalise upon these advances, it took a class of entrepreneurs, of which the most famous is Richard Arkwright. He is credited with a list of inventions, but these were actually developed by people such as Thomas Highs and John Kay; Arkwright nurtured the inventors, patented the ideas, financed the initiatives, and protected the machines. Lenovo 3000 N100 0768 Laptop Keyboard He created the cotton mill which brought the production processes together in a factory, and he developed the use of power—first horse power and then water power—which made cotton manufacture a mechanised industry. Before long steam power was applied to drive textile machinery. Manchester acquired the nickname Cottonopolis during the early 19th century owing to its sprawl of textile factories.HP Pavilion dv6-3113st Laptop Keyboard Metallurgy The major change in the metal industries during the era of the Industrial Revolution was the replacement of organic fuels based on wood with fossil fuel based on coal. Much of this happened somewhat before the Industrial Revolution, based on innovations by Sir Clement Clerke and others from 1678, using coal reverberatory furnaces known as cupolas. SAMSUNG Q330-JA02 Laptop Keyboard These were operated by the flames, which contained carbon monoxide, playing on the ore and reducing the oxide to metal. This has the advantage that impurities (such as sulphur) in the coal do not migrate into the metal. This technology was applied to lead from 1678 and to copper from 1687. It was also applied to iron foundry work in the 1690s, but in this case the reverberatory furnace was known as an air furnace. The foundry cupola is a different (and later) innovation. SAMSUNG R522 Laptop Keyboard This was followed by Abraham Darby, who made great strides using coke to fuel his blast furnaces at Coalbrookdale in 1709. However, the coke pig iron he made was used mostly for the production of cast-iron goods such as pots and kettles. He had the advantage over his rivals in that his pots, cast by his patented process, DELL Latitude D620 Laptop Keyboard were thinner and cheaper than theirs. Coke pig iron was hardly used to produce bar iron in forges until the mid-1750s, when his son Abraham Darby II built Horsehay and Ketley furnaces (not far from Coalbrookdale). By then, coke pig iron was cheaper than charcoal pig iron. Since cast iron was becoming cheaper and more plentiful, it also became a major structural material following the building of the innovative Iron Bridge in 1778 by Abraham Darby III. TOSHIBA Satellite L655-S5111 Laptop Keyboard Matthew Boulton helped James Watt to get his business off the ground. he set up a massive factory called the Soho Factory, in the midlands. Bar iron for smiths to forge into consumer goods was still made in finery forges, as it long had been. However, new processes were adopted in the ensuing years. The first is referred to today as potting and stamping, ACER Aspire 5336 Laptop Keyboard but this was superseded by Henry Cort's puddling process. From 1785, perhaps because the improved version of potting and stamping was about to come out of patent, a great expansion in the output of the British iron industry began. The new processes did not depend on the use of charcoal at all and were therefore not limited by charcoal sources. TOSHIBA Satellite L755-S5364 Laptop Keyboard Up to that time, British iron manufacturers had used considerable amounts of imported iron to supplement native supplies. This came principally from Sweden from the mid-17th century and later also from Russia from the end of the 1720s. However, from 1785, imports decreased because of the new iron making technology, and Britain became an exporter of bar iron as well as manufactured wrought iron consumer goods. TOSHIBA Satellite U305-S7467 Laptop Keyboard An improvement was made in the production of steel, which was an expensive commodity and used only where iron would not do, such as for the cutting edge of tools and for springs. Benjamin Huntsman developed his crucible steel technique in the 1740s. The raw material for this was blister steel, made by the cementation process. SONY 147859712 Laptop Keyboard The supply of cheaper iron and steel aided the development of boilers and steam engines, and eventually railways. Improvements in machine tools allowed better working of iron and steel and further boosted the industrial growth of Britain. SONY VAIO VGN-SZ220 Laptop Keyboard
Coal mining in Britain, particularly in South Wales started early. Before the steam engine, pits were often shallow bell pits following a seam of coal along the surface, which were abandoned as the coal was extracted. In other cases, if the geology was favourable, the coal was mined by means of an adit or drift mine driven into the side of a hill. DELL XPS 15 L502X Laptop Keyboard Shaft mining was done in some areas, but the limiting factor was the problem of removing water. It could be done by hauling buckets of water up the shaft or to a sough (a tunnel driven into a hill to drain a mine). In either case, the water had to be discharged into a stream or ditch at a level where it could flow away by gravity. SONY VAIO VGN-CS11Z/T Laptop Keyboard The introduction of the steam engine greatly facilitated the removal of water and enabled shafts to be made deeper, enabling more coal to be extracted. These were developments that had begun before the Industrial Revolution, but the adoption of James Watt's more efficient steam engine from the 1770s reduced the fuel costs of engines, DELL Studio 1558 Laptop Keyboard making mines more profitable. Coal mining was very dangerous owing to the presence of firedamp in many coal seams. Some degree of safety was provided by the safety lamp which was invented in 1816 by Sir Humphry Davy and independently by George Stephenson. However, the lamps proved a false dawn because they became unsafe very quickly and provided a weak light. Firedamp explosions continued, HP 365485-001 Laptop Keyboard often setting off coal dust explosions, so casualties grew during the entire 19th century. Conditions of work were very poor, with a high casualty rate from rock falls. board.html">DELL Studio 15 Laptop Keyboard
The development of the stationary steam engine was an essential early element of the Industrial Revolution; however, for most of the period of the Industrial Revolution, the majority of industries still relied on wind and water power as well as horse- and man-power for driving small machines. HP 365485-001 Laptop Keyboard The first real attempt at industrial use of steam power was due to Thomas Savery in 1698. He constructed and patented in London a low-lift combined vacuum and pressure water pump, that generated about one horsepower (hp) and was used in numerous water works and tried in a few mines (hence its "brand name", The Miner's Friend), but it was not a success since it was limited in pumping height and prone to boiler explosions. HP HDX18T-1200 CTO Laptop Keyboard The first safe and successful steam power plant was introduced by Thomas Newcomen before 1712. Newcomen apparently conceived the Newcomen steam engine quite independently of Savery, but as the latter had taken out a very wide-ranging patent, Newcomen and his associates were obliged to come to an arrangement with him, marketing the engine until 1733 under a joint patent. ASUS A6M Laptop Keyboard Newcomen's engine appears to have been based on Papin's experiments carried out 30 years earlier, and employed a piston and cylinder, one end of which was open to the atmosphere above the piston. Steam just above atmospheric pressure (all that the boiler could stand) was introduced into the lower half of the cylinder beneath the piston during the gravity-induced upstroke; HP Probook 4710S Laptop Keyboard the steam was then condensed by a jet of cold water injected into the steam space to produce a partial vacuum; the pressure differential between the atmosphere and the vacuum on either side of the piston displaced it downwards into the cylinder, raising the opposite end of a rocking beam to which was attached a gang of gravity-actuated reciprocating force pumps housed in the mineshaft. HP Pavilion dv6-2170us Laptop Keyboard TOSHIBA Satellite l20-101 Laptop Keyboard The engine's downward power stroke raised the pump, priming it and preparing the pumping stroke. At first the phases were controlled by hand, but within ten years an escapement mechanism had been devised worked by a vertical plug tree suspended from the rocking beam which rendered the engine self-acting. DELL Vostro 3500 Laptop Keyboard A number of Newcomen engines were successfully put to use in Britain for draining hitherto unworkable deep mines, with the engine on the surface; these were large machines, requiring a lot of capital to build, and produced about 5 hp (3.7 kW). They were extremely inefficient by modern standards, but when located where coal was cheap at pit heads, opened up a great expansion in coal mining by allowing mines to go deeper. Despite their disadvantagesHP Pavilion dv6-2113sa Laptop Keyboard Newcomen engines were reliable and easy to maintain and continued to be used in the coalfields until the early decades of the 19th century. By 1729, when Newcomen died, his engines had spread (first) to Hungary in 1722, Germany, Austria, and Sweden. A total of 110 are known to have been built by 1733 when the joint patent expired, of which 14 were abroad. In the 1770s, the engineer John Smeaton built some very large examples and introduced a number of improvements. A total of 1,454 engines had been built by 1800.TOSHIBA Satellite L755-S5364 Laptop Keyboard A fundamental change in working principles was brought about by James Watt. In close collaboration with Matthew Boulton, he had succeeded by 1778 in perfecting his steam engine, which incorporated a series of radical improvements, notably the closing off of the upper part of the cylinder thereby making the low pressure steam drive the top of the piston instead of the atmosphere, use of a steam jacket and the celebrated separate steam condenser chamber. DELL PK130BB1A01 Laptop Keyboard All this meant that a more constant temperature could be maintained in the cylinder and that engine efficiency no longer varied according to atmospheric conditions. These improvements increased engine efficiency by a factor of about five, saving 75% on coal costs. Bolton and Watt opened the Soho Foundry, for the manufacture of such engines, in 1795. HP Pavilion dv6-3110se Laptop Keyboard Nor could the atmospheric engine be easily adapted to drive a rotating wheel, although Wasborough and Pickard did succeed in doing so towards 1780. However by 1783 the more economical Watt steam engine had been fully developed into a double-acting rotative type, which meant that it could be used to directly drive the rotary machinery of a factory or mill. Both of Watt's basic engine types were commercially very successful, HP G61-110SA Laptop Keyboard and by 1800, the firm Boulton & Watt had constructed 496 engines, with 164 driving reciprocating pumps, 24 serving blast furnaces, and 308 powering mill machinery; most of the engines generated from 5 to 10 hp (7.5 kW). HP Pavilion dv6-3002xx Laptop Keyboard The development of machine tools, such as the lathe, planing and shaping machines powered by these engines, enabled all the metal parts of the engines to be easily and accurately cut and in turn made it possible to build larger and more powerful engines. ACER Aspire 5742 Laptop Keyboard Until about 1800, the most common pattern of steam engine was the beam engine, built as an integral part of a stone or brick engine-house, but soon various patterns of self-contained portative engines (readily removable, but not on wheels) were developed, such as the table engine. Towards the turn of the 19th century, ACER Aspire 5610Z Laptop Keyboard the Cornish engineer Richard Trevithick, and the American, Oliver Evans began to construct higher pressure non-condensing steam engines, exhausting against the atmosphere. This allowed an engine and boiler to be combined into a single unit compact enough to be used on mobile road and rail locomotives and steam boats. HP Pavilion DV6-1002tx Laptop Keyboard In the early 19th century after the expiration of Watt's patent, the steam engine underwent many improvements by a host of inventors and engineers. The large scale production of chemicals was an important development during the Industrial Revolution. The first of these was the production of sulphuric acid by the lead chamber process invented by the Englishman John Roebuck (James Watt's first partner) in 1746. ASUS F82Q Laptop Keyboard He was able to greatly increase the scale of the manufacture by replacing the relatively expensive glass vessels formerly used with larger, less expensive chambers made of riveted sheets of lead. Instead of making a small amount each time, he was able to make around 100 pounds (50 kg) in each of the chambers, at least a tenfold increase. SONY Vaio PCG-K315S Laptop Keyboard The production of an alkali on a large scale became an important goal as well, and Nicolas Leblanc succeeded in 1791 in introducing a method for the production of sodium carbonate. The Leblanc process was a reaction of sulphuric acid with sodium chloride to give sodium sulphate and hydrochloric acid. TOSHIBA Satellite L300 Laptop Keyboard The sodium sulphate was heated with limestone (calcium carbonate) and coal to give a mixture of sodium carbonate and calcium sulphide. Adding water separated the soluble sodium carbonate from the calcium sulphide. The process produced a large amount of pollution (the hydrochloric acid was initially vented to the air, HP Probook 4710S Laptop Keyboard and calcium sulphide was a useless waste product). Nonetheless, this synthetic soda ash proved economical compared to that from burning specific plants (barilla) or from kelp, which were the previously dominant sources of soda ash, and also to potash (potassium carbonate) derived from hardwood ashes. FUJITSU Lifebook P1610 Laptop Keyboard These two chemicals were very important because they enabled the introduction of a host of other inventions, replacing many small-scale operations with more cost-effective and controllable processes. Sodium carbonate had many uses in the glass, textile, soap, and paper industries. Early uses for sulphuric acid included pickling (removing rust) iron and steel, and for bleaching cloth. TOSHIBA Satellite L555-S7929 Laptop Keyboard The development of bleaching powder (calcium hypochlorite) by Scottish chemist Charles Tennant in about 1800, based on the discoveries of French chemist Claude Louis Berthollet, revolutionised the bleaching processes in the textile industry by dramatically reducing the time required (from months to days) for the traditional process then in use, HP 640436-001 Laptop Keyboard which required repeated exposure to the sun in bleach fields after soaking the textiles with alkali or sour milk. Tennant's factory at St Rollox, North Glasgow, became the largest chemical plant in the world. HP 633183-001 Laptop Keyboard In 1824 Joseph Aspdin, a British bricklayer turned builder, patented a chemical process for making portland cement which was an important advance in the building trades. This process involves sintering a mixture of clay and limestone to about 1,400 °C (2,552 °F), then grinding it into a fine powder which is then mixed with water, SAMSUNG NP-N145-JP04 Laptop Keyboard sand and gravel to produce concrete. Portland cement was used by the famous English engineer Marc Isambard Brunel several years later when constructing the Thames Tunnel. Cement was used on a large scale in the construction of the London sewerage system a generation later. Dell Inspiron 2500 Laptop Keyboard After 1860 the focus on chemical innovation was in dyestuffs, and Germany took world leadership, building a strong chemical industry. Aspring chemists flocked to German universities in the 1860-1914 era to learn the latest techniques. British scientists by contrast, lacked research universities and did not train advanced students; instead the practice was to hire German-trained chemists. HP Pavilion dv6-2114sa Laptop Keyboard
The Industrial Revolution could not have developed without machine tools, for they enabled manufacturing machines to be made. They have their origins in the tools developed in the 18th century by makers of clocks and watches and scientific instrument makers to enable them to batch-produce small mechanisms. DELL Inspiron N4110 Laptop Keyboard The mechanical parts of early textile machines were sometimes called 'clock work' because of the metal spindles and gears they incorporated. The manufacture of textile machines drew craftsmen from these trades and is the origin of the modern engineering industry. SONY VAIO VPCF12 Laptop Keyboard Machines were built by various craftsmen—carpenters made wooden framings, and smiths and turners made metal parts. A good example of how machine tools changed manufacturing took place in Birmingham, England, in 1830. The invention of a new machine by pen manufacturers, Joseph Gillott, William Mitchell and Josiah Mason, allowed mass manufacture of robust, SONY VAIO VGN-AR170P Laptop Keyboard cheap steel pen nibs. Because of the difficulty of manipulating metal and the lack of machine tools, the use of metal was kept to a minimum. Wood framing had the disadvantage of changing dimensions with temperature and humidity, and the various joints tended to rack (work loose) over time. As the Industrial Revolution progressed, TOSHIBA Satellite L775-S7243 Laptop Keyboard machines with metal frames became more common, but they required machine tools to make them economically. Before the advent of machine tools, metal was worked manually using the basic hand tools of hammers, files, scrapers, saws and chisels. Small metal parts were readily made by this means, but for large machine parts, production was very laborious and costly. SONY 147859811 Laptop Keyboard FUJITSU Amilo Mini Ui 3520 Laptop Keyboard
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