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101 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 -
102 Kussmaul, Adolf
SUBJECT AREA: Medical technology[br]b. 22 February 1822 Baden, Karlsruhe, Germanyd. 28 May 1902 Heidelberg, Germany[br]German physician and surgeon, inventor of the oesophagoscope andgastroscope.[br]Coming from two generations of a medical family, Kussmaul entered Heidelberg University in 1840 and, after qualifying, served in the German-Danish war in 1848. After four years in country practice, he received an MD from Würzburg in 1854 and soon after was appointed to a teaching post in Heidelberg. He held further positions in Erlangen, Freiburg and finally Strasbourg.His researches ranged over diabetic coma, rigor mortis, thoracocentesis and pericarditis, and in a paper on pyloric stenosis he described not only a stomach pump but also an oesophagoscope and a gastroscope and their use. He also made improvements to the ophthalmoscope. At the age of 66, on retirement from Strasbourg, he became Professor Emeritus at Heidelberg.[br]Bibliography1855, "Treatment of hypertrophy of the stomach through a new method using the stomach pump", Deutsch. Arch. Klin. Med. 6.Further ReadingT.Bast, 1826, "The life and times of Adolf Kussmaul", Annals of Medical History 8.MG -
103 Maybach, Wilhelm
[br]b. 9 February 1846 Heilbronn, Württemberg, Germanyd. 14 December 1929 Stuttgart, Germany[br]German engineer and engine designer, inventor of the spray carburettor.[br]Orphaned at the age of 10, Maybach was destined to become one of the world's most renowned engine designers. From 1868 he was apprenticed as a draughtsman at the Briiderhaus Engineering Works in Reurlingen, where his talents were recognized by Gottlieb Daimler, who was Manager and Technical Director. Nikolaus Otto had by then developed his atmospheric engine and reorganized his company, Otto \& Langen, into Gasmotorenfabrik Deutz, of which he appointed Daimler Manager. After employment at a machine builders in Karlsruhe, in 1872 Maybach followed Daimler to Deutz where he worked as a partner on the design of high-speed engines: his engines ran at up to 900 rpm, some three times as fast as conventional engines of the time. Maybach made improvements to the timing, carburation and other features. In 1881 Daimler left the Deutz Company and set up on his own as a freelance inventor, moving with his family to Bad Cannstatt; in April 1882 Maybach joined him as Engineer and Designer to set up a partnership to develop lightweight high-speed engines suitable for vehicles. A motor cycle appeared in 1885 and a modified horse-drawn carriage was fitted with a Maybach engine in 1886. Other applications to small boats, fire-engine pumps and small locomotives quickly followed, and the Vee engine of 1890 that was fitted into the French Peugeot automobiles had a profound effect upon the new sport of motor racing. In 1895 Daimler won the first international motor race and the same year Maybach became Technical Director of the Daimler firm. In 1899 Emil Jellinek, Daimler agent in France and also Austro-Hungarian consul, required a car to compete with Panhard and Levassor, who had been victorious in the Paris-Bordeaux race; he wanted more power and a lower centre of gravity, and turned to Maybach with his requirements, the 35 hp Daimler- Simplex of 1901 being the outcome. Its performance and road holding superseded those of all others at the time; it was so successful that Jellinek immediately placed an order for thirty-six cars. His daughter's name was Mercedes, after whom, when the merger of Daimler and Benz came about, the name Mercedes-Benz was adopted.In his later years, Maybach designed the engine for the Zeppelin airships. He retired from the Daimler Company in 1907.[br]Principal Honours and DistinctionsSociety of German Engineers Grashof Medal (its highest honour). In addition to numerous medals and titles from technical institutions, Maybach was awarded an honorary doctorate from the Stuttgart Institute of Technology.Further ReadingF.Schidberger, Gottlieb Daimler, Wilhelm Maybach and Karl Benz, Stuttgart: Daimler Benz AG.1961, The Annals of Mercedes-Benz Motor Vehicles and Engines, 2nd edn, Stuttgart: Daimler Benz AG.E.Johnson, 1986, The Dawn of Motoring.KAB / IMcN -
104 Poniatoff, Alexander Mathew
[br]b. 25 March 1892 Kazan District, Russiad. 24 October 1980[br]Russian (naturalized American in 1932) electrical engineer responsible for the development of the professional tape recorder and the first commercially-successful video tape recorder (VTR).[br]Poniatoff was educated at the University of Kazan, the Imperial College in Moscow, and the Technische Hochschule in Karlsruhe, gaining degrees in mechanical and electrical engineering. He was in Germany when the First World War broke out, but he managed to escape back to Russia, where he served as an Air Force pilot with the Imperial Russian Navy. During the Russian Revolution he was a pilot with the White Russian Forces, and escaped into China in 1920; there he found work as an assistant engineer in the Shanghai Power Company. In 1927 he immigrated to the USA, becoming a US citizen in 1932. He obtained a post in the research and development department of the General Electric Company in Schenectady, New York, and later at Dalmo Victor, San Carlos, California. During the Second World War he was involved in the development of airborne radar for the US Navy.In 1944, taking his initials to form the title, Poniatoff founded the AMPEX Corporation to manufacture components for the airborne radar developed at General Electric, but in 1946 he turned to the production of audio tape recorders developed from the German wartime Telefunken Magnetophon machine (the first tape recorder in the truest sense). In this he was supported by the entertainer Bing Crosby, who needed high-quality replay facilities for broadcasting purposes, and in 1947 he was able to offer a professional-quality product and the business prospered.With the rapid post-war boom in television broadcasting in the USA, a need soon arose for a video recorder to provide "time-shifting" of live TV programmes between the different US time zones. Many companies therefore endeavoured to produce a video tape recorder (VTR) using the same single-track, fixed-head, longitudinal-scan system used for audio, but the very much higher bandwidth required involved an unacceptably high tape-speed. AMPEX attempted to solve the problem by using twelve parallel tracks and a machine was demonstrated in 1952, but it proved unsatisfactory.The development team, which included Charles Ginsburg and Ray Dolby, then devised a four-head transverse-scan system in which a quadruplex head rotating at 14,400 rpm was made to scan across the width of a 2 in. (5 cm) tape with a tape-to-head speed of the order of 160 ft/sec (about 110 mph; 49 m/sec or 176 km/h) but with a longitudinal tape speed of only 15 in./sec (0.38 m/sec). In this way, acceptable picture quality was obtained with an acceptable tape consumption. Following a public demonstration on 14 April 1956, commercial produc-tion of studio-quality machines began to revolutionize the production and distribution of TV programmes, and the perfecting of time-base correctors which could stabilize the signal timing to a few nanoseconds made colour VTRs a practical proposition. However, AMPEX did not rest on its laurels and in the face of emerging competition from helical scan machines, where the tracks are laid diagonally on the tape, the company was able to demonstrate its own helical machine in 1957. Another development was the Videofile system, in which 250,000 pages of facsimile could be recorded on a single tape, offering a new means of archiving information. By 1986, quadruplex VTRs were obsolete, but Poniatoff's role in making television recording possible deserves a place in history.Poniatoff was President of AMPEX Corporation until 1955 and then became Chairman of the Board, a position he held until 1970.[br]Further ReadingA.Abrahamson, 1953, "A short history of television recording", Part I, JSMPTE 64:73; 1973, Part II, Journal of the Society of Motion Picture and Television Engineers, 82:188 (provides a fuller background).Audio Biographies, 1961, ed. G.A.Briggs, Wharfedale Wireless Works, pp. 255–61 (contains a few personal details about Poniatoff's escape from Germany to join the Russian Navy).E.Larsen, 1971, A History of Invention.Charles Ginsburg, 1981, "The horse or the cowboy. Getting television on tape", Journal of the Royal Television Society 18:11 (a brief account of the AMPEX VTR story).KF / GB-NBiographical history of technology > Poniatoff, Alexander Mathew
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105 Riggenbach, Niklaus
[br]b. 21 May 1817 Gebweiler, Alsaced. 25 July 1899 Olten, Switzerland[br]Swiss locomotive engineer and pioneer of mountain rack railways.[br]Riggenbach came from a Basle family and was educated in Basle, Lyons and Paris, where he was so impressed by the new railway to Saint-Germain that he decided to devote himself to work in that field. He worked for Kessler's locomotive works in Karlsruhe, which built the first locomotives for the Zurich-Baden Railway. This was the first railway in Switzerland and when it was opened in 1847 Riggenbach drove the first train. He subsequently became Locomotive Superintendent of the Swiss Central Railway, and the problems of operating a steeply graded line solely by adhesion led him to develop a rack railway which incorporated a ladder rack similar to that of Sylvester Marsh. However, it was only after the Swiss Consul in Washington had reported enthusiastically on the Mount Washington Cog Railway that Riggenbach and associates were able to get a concession for their first line, which was laid up the Rigi mountain and was opened in 1871. That same year Riggenbach opened a quarry railway operated for the first time by a mixture of rack and adhesion. From this start, rack railways were built widely in Switzerland and to a lesser extent in many other parts of the world. His Rigi railway continues to operate.[br]BibliographyRiggenbach patented his rack railway in 1863.Further ReadingRiggenbach's type of counter-pressure brakes is described in Transactions of the Newcomen Society 55:13.M.Dietschy, 1971, "Le Chemin de fer du Rigi à 100 ans", Chemins defer régionaux eturbains 106.O.J.Morris, 1951, The Snow don Mountain Railway, Ian Allan.See also: Abt, RomanPJGR -
106 Staudinger, Hermann
[br]b. 23 March 1881 Worms, Germanyd. 8 September 1965 Freiberg im Breisgau, Germany[br]German chemist, founder of polymer chemistry.[br]Staudinger studied chemistry at the universities of Halle, Darmstadt and Munich, originally as a preparation for botanical studies, but chemistry claimed his full attention. He followed an academic career, with professorships at Karlsruhe in 1908, Zurich in 1912 and Freiberg from 1926 until his retirement in 1951. Staudinger began his work as an organic chemist by following well-established lines of research, but from 1920 he struck out in a new direction. Until that time, rubber and other apparently non-crystalline materials with high molecular weight were supposed to consist of a disordered collection of small molecules. Staudinger investigated the structure of rubber and realized that it was made up of very large molecules with many basic groups of atoms held together by normal chemical bonds. Substances formed in this way are known as "polymers". Staudinger's views first met with opposition, but he developed methods of determining the molecular weights of these "high polymers". Finally, the introduction of X-ray crystallographic investigation of chemical structure confirmed his views. This discovery has proved to be the basis of a new branch of chemistry with momentous consequences for industry. From it stemmed the synthetic rubber, plastics, fibres, adhesives and other industries, with all their multifarious applications in everyday life. The Staudinger equation, linking viscosity with molecular weight, is still widely used, albeit with some reservations, in the polymer industry.During the 1930s, Staudinger turned his attention to biopolymers and foresaw the discovery some twenty years later that these macromolecules were the building blocks of life. In 1953 he belatedly received the Nobel Prize in Chemistry.[br]Principal Honours and DistinctionsNobel Prize in Chemistry 1953.Bibliography1961, Arbeitserinnerungen, Heidelberg; pub. in English, 1970 as From Organic Chemistry to Macromolecules, New York (includes a comprehensive bibliography of 644 items).Further ReadingE.Farber, 1963, Nobel Prize Winners in Chemistry, New York.R.C.Olby, 1970, "The macromolecular concept and the origins of molecular biology", J. Chem. Ed. 47:168–74.LRD
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