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21 sliven
pp flown together; metal founded, fused -
22 stuth
stuff, metal; founded on the English stuff. -
23 Gray, Elisha
SUBJECT AREA: Telecommunications[br]b. 2 August 1835 Barnesville, Ohio, USAd. 21 January 1901 Newtonville, Massachusetts, USA[br]American inventor who was only just beaten by Alexander Graham Bell in the race for the first telephone patent.[br]Initially apprenticed to a carpenter, Gray soon showed an interest in chemistry, but he eventually studied electrical engineering at Oberlin College, Oberlin, Ohio, in the late 1850s. In 1869 he founded the Western Electric Manufacturing Company, where he devised an electric-needle annunciator for use in hotels and lifts and carried out experimental work aimed at the development of a means of distant-speech communication. After successful realization of a liquid-based microphone and public demonstrations of a receiver using a metal diaphragm, on 14 February 1876 he deposited a caveat of intention to file a patent claim within three months for the invention of the telephone, only to learn that Alexander Graham Bell had filed a full patent claim only three hours earlier on the same day. Following litigation, the patent was eventually awarded to Bell. In 1880 Gray was appointed Professor of Dynamic Electricity at Oberlin College, but he appears to have retained his business interests since in 1891 he was both a member of the firm of Gray and Barton and electrician to his old firm, Western Electric. Subsequently, in 1895, he invented the TelAutograph, a form of remote-writing telegraph, or facsimile, capable of operating over short distances. The system used a transmitter in which the x and y movements of a writing stylus were coupled to a pair of variable resistors. In turn, these were connected by two telegraph wires to a pair of receiving coils, which were used to control the position of a pen on a sheet of paper, thus replicating the movement of the original stylus.[br]Bibliography1878, Experimental Research in Electro-Harmonic Telegraph and Telephony, 1867–76.Further ReadingJ.Munro, 1891, Heroes of the Telegraph.D.A.Hounshill, 1975, "Elisha Gray and the telephone. On the disadvantage of being an expert", Technology and Culture 16:133.—1976, "Bell and Gray. Contrast in style, politics and etiquette", Proceedings of the Institute of Electrical and Electronics Engineers 64:1,305.International Telecommunications Union, 1965, From Semaphore to Satellite, Geneva.KF -
24 Hunter, Matthew Albert
SUBJECT AREA: Metallurgy[br]b. 9 November 1878 Auckland Province, New Zealandd. 24 March 1961 Troy, New York, USA[br]New Zealand/American technologist and academic who was a pioneer in the production of metallic titanium.[br]Hunter arrived in England in 1902, the seventh in the succession of New Zealand students nominated for the 1851 Exhibition science research scholarships (the third, in 1894, having been Ernest Rutherford). He intended to study the metallurgy of tellurides at the Royal School of Mines, but owing to the death of the professor concerned, he went instead to University College London, where his research over two years involved the molecular aggregation of liquified gases. In 1904–5 he spent a third year in Göttingen, Paris and Karlsruhe. Hunter then moved to the USA, beginning work in 1906 with the General Electric Company in Schenectady. His experience with titanium came as part of a programme to try to discover satisfactory lamp-filament materials. He and his colleagues achieved more success in producing moderately pure titanium than previous workers had done, but found the metal's melting temperature inadequate. However, his research formed the basis for the "Hunter sodium process", a modern method for producing commercial quantities of titanium. In 1908 he was appointed Assistant Professor of Electrochemistry and Physics at Rensselaer Polytechnic Institute in Troy, New York, where he was to remain until his retirement in 1949 as Dean Emeritus. In the 1930s he founded and headed the Institute's Department of Metallurgical Engineering. As a consultant, he was associated with the development of Invar, Managanin and Constantan alloys.[br]Principal Honours and Distinctions1851 Great Exhibition science research scholar 1902–5. DSc London University 1904. American Die Casting Institute Doehler Award 1959. American Society for Metals Gold Medal 1959.Bibliography1910, "Metallic titanium", Journal of the American Chemistry Society 32:330–6 (describes his work relating to titanium production).Further Reading1961, "Man of metals", Rensselaer Alumni News (December), 5–7:32.JKA -
25 Kettering, Charles Franklin
SUBJECT AREA: Automotive engineering, Electricity, Electronics and information technology, Metallurgy, Steam and internal combustion engines[br]b. 29 August 1876 near Londonsville, Ohio, USAd. 25 November 1958 Dayton, Ohio, USA[br]American engineer and inventor.[br]Kettering gained degrees in mechanical and electrical engineering from Ohio State University. He was employed by the National Construction Register (NCR) of Dayton, Ohio, where he devised an electric motor for use in cash registers. He became Head of the Inventions Department of that company but left in 1909 to form, with the former Works Manager of NCR, Edward A. Deeds, the Dayton Engineering Laboratories (later called Delco), to develop improved lighting and ignition systems for automobiles. In the first two years of the new company he produced not only these but also the first self-starter, both of which were fitted to the Cadillac, America's leading luxury car. In 1914 he founded Dayton Metal Products and the Dayton Wright Airplane Company. Two years later Delco was bought by General Motors. In 1925 the independent research facilities of Delco were moved to Detroit and merged with General Motors' laboratories to form General Motors Research Corporation, of which Kettering was President and General Manager. (He had been Vice-President of General Motors since 1920.) In that position he headed investigations into methods of achieving maximum engine performance as well as into the nature of friction and combustion. Many other developments in the automobile field were made under his leadership, such as engine coolers, variable-speed transmissions, balancing machines, the two-way shock absorber, high-octane fuel, leaded petrol or gasoline, fast-drying lacquers, crank-case ventilators, chrome plating, and the high-compression automobile engine. Among his other activities were the establishment of the Charles Franklin Kettering Foundation for the Study of Chlorophyll and Photosynthesis at Antioch College, and the founding of the Sloan- Kettering Institute for Cancer Research in New York City. He sponsored the Fever Therapy Research Project at Miami Valley Hospital at Dayton, which developed the hypertherm, or artificial fever machine, for use in the treatment of disease. He resigned from General Motors in 1947.IMcNBiographical history of technology > Kettering, Charles Franklin
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26 Reichenbach, Georg Friedrich von
SUBJECT AREA: Mechanical, pneumatic and hydraulic engineering, Photography, film and optics, Public utilities[br]b. 24 August 1772 Durlach, Baden, Germanyd. 21 May 1826 Munich, Germany[br]German engineer.[br]While he was attending the Military School at Mannheim, Reichenbach drew attention to himself due to the mathematical instruments that he had designed. On the recommendation of Count Rumford in Munich, the Bavarian government financed a two-year stay in Britain so that Reichenbach could become acquainted with modern mechanical engineering. He returned to Mannheim in 1793, and during the Napoleonic Wars he was involved in the manufacture of arms. In Munich, where he was in the service of the Bavarian state from 1796, he started producing precision instruments in his own time. His basic invention was the design of a dividing machine for circles, produced at the end of the eighteenth century. The astronomic and geodetic instruments he produced excelled all the others for their precision. His telescopes in particular, being perfect in use and of solid construction, soon brought him an international reputation. They were manufactured at the MathematicMechanical Institute, which he had jointly founded with Joseph Utzschneider and Joseph Liebherr in 1804 and which became a renowned training establishment. The glasses and lenses were produced by Joseph Fraunhofer who joined the company in 1807.In the same year he was put in charge of the technical reorganization of the salt-works at Reichenhall. After he had finished the brine-transport line from Reichenhall to Traunstein in 1810, he started on the one from Berchtesgaden to Reichenhall which was an extremely difficult task because of the mountainous area that had to be crossed. As water was the only source of energy available he decided to use water-column engines for pumping the brine in the pipes of both lines. Such devices had been in use for pumping purposes in different mining areas since the middle of the eighteenth century. Reichenbach knew about the one constructed by Joseph Karl Hell in Slovakia, which in principle had just been a simple piston-pump driven by water which did not work satisfactorily. Instead he constructed a really effective double-action water-column engine; this was a short time after Richard Trevithick had constructed a similar machine in England. For the second line he improved the system and built a single-action pump. All the parts of it were made of metal, which made them easy to produce, and the pumps proved to be extremely reliable, working for over 100 years.At the official opening of the line in 1817 the Bavarian king rewarded him generously. He remained in the state's service, becoming head of the department for roads and waterways in 1820, and he contributed to the development of Bavarian industry as well as the public infrastructure in many ways as a result of his mechanical skill and his innovative engineering mind.[br]Further ReadingBauernfeind, "Georg von Reichenbach" Allgemeine deutsche Biographie 27:656–67 (a reliable nineteenth-century account).W.Dyck, 1912, Georg v. Reichenbach, Munich.K.Matschoss, 1941, Grosse Ingenieure, Munich and Berlin, 3rd edn. 121–32 (a concise description of his achievements in the development of optical instruments and engineering).WKBiographical history of technology > Reichenbach, Georg Friedrich von
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27 Saulnier, Raymond
SUBJECT AREA: Aerospace[br]b. late eighteenth century Franced. mid-twentieth century[br]French designer of aircraft, associated with Louis Blériot and later the Morane- Saulnier company.[br]When Louis Blériot made his historic flight across the English Channel in 1909, the credit for the success of the flight naturally went to the pilot. Few people thought about the designer of the successful aeroplane, and those who did assumed it was Blériot himself. Blériot did design several of the aeroplanes bearing his name, but the cross- Channel No. XI was mainly designed by his friend Raymond Saulnier, a fact not; broadcast at the time.In 1911 the Morane-Saulnier company was founded in Paris by Léon (1885–1918) and Robert (1886–1968) Morane and Raymond Saulnier, who became Chief Designer. Flying a Morane-Saulnier, Roland Garros made a recordbreaking flight to a height of 5,611 m (18,405 ft) in 1912, and the following year he made the first non-stop flight across the Mediterranean. Morane-Saulnier built a series of "parasol" monoplanes which were very widely used during the early years of the First World War. With the wing placed above the fuselage, the pilot had an excellent downward view for observation purposes, but the propeller ruled out a forward-firing machine gun. During 1913–4, Raymond Saulnier was working on an idea for a synchronized machine gun to fire between the blades of the propeller. He could not overcome certain technical problems, so he devised a simple alternative: metal deflector plates were fitted to the propeller, so if a bullet hit the blade it did no harm. Roland Garros, flying a Type L Parasol, tested the device in action during April 1915 and was immediately successful. This opened the era of the true fighter aircraft. Unfortunately, Garros was shot down and the Germans discovered his secret weapon: they improved on the idea with a fully synchronized machine gun fitted to the Fokker E 1 monoplane. The Morane-Saulnier company continued in business until 1963, when it was taken over by the Potez Group.[br]Further ReadingJane's Fighting Aircraft of World War I, 1990, London: Jane's (reprint) (provides plans and details of 1914–18 Morane-Saulnier aeroplanes).JDS -
28 Sutton, Thomas
SUBJECT AREA: Photography, film and optics[br]b. 1819 Englandd. 1875 Jersey, Channel Islands[br]English photographer and writer on photography.[br]In 1841, while studying at Cambridge, Sutton became interested in photography and tried out the current processes, daguerreotype, calotype and cyanotype among them. He subsequently settled in Jersey, where he continued his photographic studies. In 1855 he opened a photographic printing works in Jersey, in partnership with L.-D. Blanquart- Evrard, exploiting the latter's process for producing developed positive prints. He started and edited one of the first photographic periodicals, Photographic Notes, in 1856; until its cessation in 1867, his journal presented a fresher view of the world of photography than that given by its London-based rivals. He also drew up the first dictionary of photography in 1858.In 1859 Sutton designed and patented a wideangle lens in which the space between two meniscus lenses, forming parts of a sphere and sealed in a metal rim, was filled with water; the lens so formed could cover an angle of up to 120 degrees at an aperture of f12. Sutton's design was inspired by observing the images produced by the water-filled sphere of a "snowstorm" souvenir brought home from Paris! Sutton commissioned the London camera-maker Frederick Cox to make the Panoramic camera, demonstrating the first model in January 1860; it took panoramic pictures on curved glass plates 152×381 mm in size. Cox later advertised other models in a total of four sizes. In January 1861 Sutton handed over manufacture to Andrew Ross's son Thomas Ross, who produced much-improved lenses and also cameras in three sizes. Sutton then developed the first single-lens reflex camera design, patenting it on 20 August 1961: a pivoted mirror, placed at 45 degrees inside the camera, reflected the image from the lens onto a ground glass-screen set in the top of the camera for framing and focusing. When ready, the mirror was swung up out of the way to allow light to reach the plate at the back of the camera. The design was manufactured for a few years by Thomas Ross and J.H. Dallmeyer.In 1861 James Clerk Maxwell asked Sutton to prepare a series of photographs for use in his lecture "On the theory of three primary colours", to be presented at the Royal Institution in London on 17 May 1861. Maxwell required three photographs to be taken through red, green and blue filters, which were to be printed as lantern slides and projected in superimposition through three projectors. If his theory was correct, a colour reproduction of the original subject would be produced. Sutton used liquid filters: ammoniacal copper sulphate for blue, copper chloride for the green and iron sulphocyanide for the red. A fourth exposure was made through lemon-yellow glass, but was not used in the final demonstration. A tartan ribbon in a bow was used as the subject; the wet-collodion process in current use required six seconds for the blue exposure, about twice what would have been needed without the filter. After twelve minutes no trace of image was produced through the green filter, which had to be diluted to a pale green: a twelve-minute exposure then produced a serviceable negative. Eight minutes was enough to record an image through the red filter, although since the process was sensitive only to blue light, nothing at all should have been recorded. In 1961, R.M.Evans of the Kodak Research Laboratory showed that the red liquid transmitted ultraviolet radiation, and by an extraordinary coincidence many natural red dye-stuffs reflect ultraviolet. Thus the red separation was made on the basis of non-visible radiation rather than red, but the net result was correct and the projected images did give an identifiable reproduction of the original. Sutton's photographs enabled Maxwell to establish the validity of his theory and to provide the basis upon which all subsequent methods of colour photography have been founded.JW / BC -
29 Voigtländer, Peter Wilhelm Friedrich
SUBJECT AREA: Photography, film and optics[br]b. 1812 Vienna, Austria d. 1878[br]Austrian manufacturer of the first purpose-designed photographic objective; key member of a dynasty of optical instrument makers.[br]Educated at the Polytechnic Institute in Vienna, Voigtländer travelled widely before taking over the family business in 1837. The business had been founded by Voigtländer's grandfather in 1756, and was continued by his father, Johann Friedrich, the inventor of the opera glass, and by the 1830s enjoyed one of the highest reputations in Europe. When Petzval made the calculations for the first purpose-designed photographic objective in 1840, it was inevitable that he should go to Peter Voigtländer for advice. The business went on to manufacture Petzval's lens, which was also fitted to an all-metal camera of totally original design by Voigtländer.The Petzval lens was an extraordinary commercial success and Voigtländer sold specimens all over the world. Unfortunately Petzval had no formal agreement with Voigtländer and made little financial gain from his design, a fact which was to lead to dispute and separation; the Voigtländer concern continued to prosper, however. To meet the increasing demand for his products, Peter Voigtländer built a new factory in Brunswick and closed the business in Vienna. The closure is seen by at least one commentator as the death blow to Vienna's optical industry, a field in which it was once preeminent. The Voigtländer dynasty continued long after Peter's death and the name enjoyed a reputation for high-quality photographic equipment well into the twentieth century.[br]Principal Honours and DistinctionsHereditary Peerage bestowed by the Emperor of Austria 1868.Further ReadingL.W.Sipley, 1965, Photography's Great Inventors, Philadelphia (a brief biography). J.M.Eder, 1945, History of Photography, trans. E.Epstean, New York.JWBiographical history of technology > Voigtländer, Peter Wilhelm Friedrich
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30 Williams, Thomas
[br]b. 13 May 1737 Cefn Coch, Anglesey, Walesd. 29 November 1802 Bath, England[br]Welsh lawyer, mine-owner and industrialist.[br]Williams was articled by his father, Owen Williams of Treffos in Anglesey, to the prominent Flintshire lawyer John Lloyd, whose daughter Catherine he is believed to have married. By 1769 Williams, lessee of the mansion and estate of Llanidan, was an able lawyer with excellent connections in Anglesey. His life changed dramatically when he agreed to act on behalf of the Lewis and Hughes families of Llysdulas, who had begun a lawsuit against Sir Nicholas Bayly of Plas Newydd concerning the ownership and mineral rights of copper mines on the western side of Parys mountain. During a prolonged period of litigation, Williams managed these mines for Margaret Lewis on behalf of Edward Hughes, who was established after a judgement in Chancery in 1776 as one of two legal proprietors, the other being Nicholas Bayly. The latter then decided to lease his portion to the London banker John Dawes, who in 1778 joined Hughes and Thomas Williams when they founded the Parys Mine Company.As the active partner in this enterprise, Williams began to establish his own smelting and fabricating works in South Wales, Lancashire and Flintshire, where coal was cheap. He soon broke the power of Associated Smelters, a combine holding the Anglesey mine owners to ransom. The low production cost of Anglesey ore gave him a great advantage over the Cornish mines and he secured very profitable contracts for the copper sheathing of naval and other vessels. After several British and French copper-bottomed ships were lost because of corrosion failure of the iron nails and bolts used to secure the sheathing, Williams introduced a process for manufacturing heavily work-hardened copper bolts and spikes which could be substituted directly for iron fixings, avoiding the corrosion difficulty. His new product was adopted by the Admiralty in 1784 and was soon used extensively in British and European dockyards.In 1785 Williams entered into partnership with Lord Uxbridge, son and heir of Nicholas Bayly, to run the Mona Mine Company at the Eastern end of Parys Mountain. This move ended much enmity and litigation and put Williams in effective control of all Anglesey copper. In the same year, Williams, with Matthew Boulton and John Wilkinson, persuaded the Cornish miners to establish a trade cooperative, the Cornish Metal Company, to market their ores. When this began to fall in 1787, Williams took over its administration, assets and stocks and until 1792 controlled the output and sale of all British copper. He became known as the "Copper King" and the output of his many producers was sold by the Copper Offices he established in London, Liverpool and Birmingham. In 1790 he became Member of Parliament for the borough of Great Marlow, and in 1792 he and Edward Hughes established the Chester and North Wales Bank, which in 1900 was absorbed by the Lloyds group.After 1792 the output of the Anglesey mines started to decline and Williams began to buy copper from all available sources. The price of copper rose and he was accused of abusing his monopoly. By this time, however, his health had begun to deteriorate and he retreated to Bath.[br]Further ReadingJ.R.Harris, 1964, The "Copper King", Liverpool University Press.ASD
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