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1 research and technology laboratories
Military: RTLУниверсальный русско-английский словарь > research and technology laboratories
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2 научно-технические лаборатории
Military: research and technology laboratoriesУниверсальный русско-английский словарь > научно-технические лаборатории
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3 Monro, Philip Peter
SUBJECT AREA: Chemical technology[br]b. 27 May 1946 London, England[br]English biologist, inventor of a water-purification process by osmosis.[br]Monro's whole family background is engineering, an interest he did not share. Instead, he preferred biology, an enthusiasm aroused by reading the celebrated Science of Life by H.G. and G.P.Wells and Julian Huxley. Educated at a London comprehensive school, Monro found it necessary to attend evening classes while at school to take his advanced level science examinations. Lacking parental support, he could not pursue a degree course until he was 21 years old, and so he gained valuable practical experience as a research technician. He resumed his studies and took a zoology degree at Portsmouth Polytechnic. He then worked in a range of zoology and medical laboratories, culminating after twelve years as a Senior Experimental Officer at Southampton Medical School. In 1989 he relinquished his post to devote himself fall time to developing his inventions as Managing Director of Hampshire Advisory and Technical Services Ltd (HATS). Also in 1988 he obtained his PhD from Southampton University, in the field of embryology.Monro had meanwhile been demonstrating a talent for invention, mainly in microscopy. His most important invention, however, is of a water-purification system. The idea for it came from Michael Wilson of the Institute of Dental Surgery in London, who evolved a technique for osmotic production of sterile oral rehydration solutions, of particular use in treating infants suffering from diarrhoea in third-world countries. Monro broadened the original concept to include dried food, intravenous solutions and even dried blood. The process uses simple equipment and no external power and works as follows: a dry sugar/salts mixture is sealed in one compartment of a double bag, the common wall of which is a semipermeable membrane. Impure water is placed in the empty compartment and the water transfers across the membrane by the osmotic force of the sugar/salts. As the pores in the membrane exclude all viruses, bacteria and their toxins, a sterile solution is produced.With the help of a research fellowship granted for humanitarian reasons at King Alfred College, Winchester, the invention was developed to functional prototype stage in 1993, with worldwide patent protection. Commercial production was expected to follow, if sufficient financial backing were forthcoming. The process is not intended to replace large installations, but will revolutionize the small-scale production of sterile water in scattered third-world communities and in disaster areas where normal services have been disrupted.HATS was awarded First Prize in the small business category and was overall prize winner in the Toshiba Year of Invention, received a NatWest/BP award for technology and a Prince of Wales Award for Innovation.[br]Bibliography1993, with M.Wilson and W.A.M.Cutting, "Osmotic production of sterile oral rehydration solutions", Tropical Doctor 23:69–72.LRD -
4 Colpitts, Edwin Henry
[br]b. 9 January 1872 Pointe de Bute, Canadad. 6 March 1949 Orange, New Jersey, USA[br]Canadian physicist and electrical engineer responsible for important developments in electronic-circuit technology.[br]Colpitts obtained Bachelor's degrees at Mount Allison University, Sackville, New Brunswick, and Harvard in 1894 and 1896, respectively, followed by a Master's degree at Harvard in 1897. After two years as assistant to the professor of physics there, he joined the American Bell Telephone Company. When the Bell Company was reorganized in 1907, he moved to the Western Electric branch of the company in New York as Head of the Physical Laboratories. In 1911 he became a director of the Research Laboratories, and in 1917 he became Assistant Chief Engineer of the company. During this time he invented both the push-pull amplifier and the Colpitts oscillator, both major developments in communications. In 1917, during the First World War, he spent some time in France helping to set up the US Signal Corps Research Laboratories. Afterwards he continued to do much, both technically and as a manager, to place telephone communications on a firm scientific basis, retiring as Vice-President of the Bell Telephone Laboratories in 1937. With the outbreak of the Second World War in 1941 he was recalled from retirement and appointed Director of the Engineering Foundation to work on submarine warfare techniques, particularly echo-ranging.[br]Principal Honours and DistinctionsOrder of the Rising Sun, Japan, 1938. US Medal of Merit 1948.Bibliography1919, with E.B.Craft, "Radio telephony", Proceedings of the American Institution of Electrical Engineers 38:337.1921, with O.B.Blackwell, "Carrier current telephony and telegraphy", American Institute of Electrical Engineers Transactions 40:205.11 September 1915, US reissue patent no. 15,538 (control device for radio signalling).28 August 1922, US patent no. 1,479,638 (multiple signal reception).Further ReadingM.D.Fagen, 1975, A History of Engineering \& Science in the Bell System, Vol. 1, Bell Laboratories.See also: Hartley, Ralph V.L.KF -
5 Stibitz, George R.
SUBJECT AREA: Electronics and information technology[br]b. 20 April 1904 York, Pennsylvania, USA[br]American mathematician responsible for the conception of the Bell Laboratories "Complex " computer.[br]Stibitz spent his early years in Dayton, Ohio, and obtained his first degree at Denison University, Granville, Ohio, his MS from Union College, Schenectady, New York, in 1927 and his PhD in mathematical physics from Cornell University, Ithaca, New York, in 1930. After working for a time for General Electric, he joined Bell Laboratories to work on various communications problems. In 1937 he started to experiment at home with telephone relays as the basis of a calculator for addition, multiplication and division. Initially this was based on binary arithmetic, but later he used binary-coded decimal (BCD) and was able to cope with complex numbers. In November 1938 the ideas were officially taken up by Bell Laboratories and, with S.B.Williams as Project Manager, Stibitz built a complex-number computer known as "Complex", or Relay I, which became operational on 8 January 1940.With the outbreak of the Second World War, he was co-opted to the National Defence Research Council to work on anti-aircraft (AA) gun control, and this led to Bell Laboratories Relay II computer, which was completed in 1943 and which had 500 relays, bi-quinary code and selfchecking of errors. A further computer, Relay III, was used for ballistic simulation of actual AA shell explosions and was followed by more machines before and after Stibitz left Bell after the end of the war. Stibitz then became a computer consultant, involved in particular with the development of the UNIVAC computer by John Mauchly and J.Presper Eckert.[br]Principal Honours and DistinctionsInstitute of Electrical and Electronics Engineers Emanuel R.Priore Award 1977.Bibliography1957, with J.A.Larrivee, Mathematics and Computers, New York: McGraw-Hill. 1967, "The Relay computer at the Bell Laboratories", Datamation 35.Further ReadingE.Loveday, 1977, "George Stibitz and the Bell Labs Relay computer", Datamation 80. M.R.Williams, 1985, A History of Computing Technology, London: Prentice-Hall.KF -
6 Bode, Hendrik Wade
[br]b. 24 December 1905 Madison, Wisconsin, USAd. 21 June 1982 Cambridge, Massachusetts, USA[br]American engineer who developed an extensive theoretical understanding of the behaviour of electronic circuits.[br]Bode received his bachelor's and master's degrees from Ohio State University in 1924 and 1926, respectively, and his PhD from Columbia University, New York, in 1935. In 1926 he joined the Bell Telephone Laboratories, where he made many theoretical contributions to the understanding of the behaviour of electronic circuits and, in particular, in conjunction with Harry Nyquist, of the conditions under which amplifier circuits become unstable.During the Second World War he worked on the design of gun control systems and afterwards was a member of a team that worked with Douglas Aircraft to develop the Nike anti-aircraft missile. A member of the Bell Laboratories Mathematical Research Group from 1929, he became its Director in 1952, and then Director of Physical Sciences. Finally he became Vice-President of the Laboratories, with responsibility for systems engineering, and a director of Bellcomm, a Bell company involved in the Moon-landing programme. When he retired from Bell in 1967, he became Professor of Systems Engineering at Harvard University.[br]Principal Honours and DistinctionsPresidential Certificate of Merit 1946. Institute of Electrical and Electronics Engineers Edison Medal 1969.Bibliography1940, "Relation between attenuation and phase in feedback amplifier design", Bell System Technical Journal 19:421.1945, Network Analysis and Feedback Amplifier Design, New York: Van Nostrand.1950, with C.E.Shannon, "A simplified derivation of linear least squares smoothing and prediction theory", Proceedings of the Institute of Radio Engineers 38:417.1961, "Feedback. The history of an idea", Proceedings of the Symposium on Active Networks and Feedback Systems, Brooklyn Polytechnic.1971, Synergy: Technical Integration and Technical Innovation in the Bell System Bell Laboratories, Bell Telephone Laboratories (provides background on his activities at Bell).Further ReadingP.C.Mahon, 1975, Mission Communications, Bell Telephone Laboratories. See also Black, Harold Stephen; Shannon, Claude Elwood.KF -
7 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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8 Kompfner, Rudolph
[br]b. 16 May 1909 Vienna, Austriad. 3 December 1977 Stanford, California, USA[br]Austrian (naturalized English in 1949, American in 1957) electrical engineer primarily known for his invention of the travelling-wave tube.[br]Kompfner obtained a degree in engineering from the Vienna Technische Hochschule in 1931 and qualified as a Diplom-Ingenieur in Architecture two years later. The following year, with a worsening political situation in Austria, he moved to England and became an architectural apprentice. In 1936 he became Managing Director of a building firm owned by a relative, but at the same time he was avidly studying physics and electronics. His first patent, for a television pick-up device, was filed in 1935 and granted in 1937, but was not in fact taken up. In June 1940 he was interned on the Isle of Man, but as a result of a paper previously sent by him to the Editor of Wireless Engineer he was released the following December and sent to join the group at Birmingham University working on centimetric radar. There he worked on klystrons, with little success, but as a result of the experience gained he eventually invented the travelling-wave tube (TWT), which was based on a helical transmission line. After disbandment of the Birmingham team, in 1946 Kompfner moved to the Clarendon Laboratory at Oxford and in 1947 he became a British subject. At the Clarendon Laboratory he met J.R. Pierce of Bell Laboratories, who worked out the theory of operation of the TWT. After gaining his DPhil at Oxford in 1951, Kompfner accepted a post as Principal Scientific Officer at Signals Electronic Research Laboratories, Baldock, but very soon after that he was invited by Pierce to work at Bell on microwave tubes. There, in 1952, he invented the backward-wave oscillator (BWO). He was appointed Director of Electronics Research in 1955 and Director of Communications Research in 1962, having become a US citizen in 1957. In 1958, with Pierce, he designed Echo 1, the first (passive) satellite, which was launched in August 1960. He was also involved with the development of Telstar, the first active communications satellite, which was launched in 1962. Following his retirement from Bell in 1973, he continued to pursue research, alternately at Stanford, California, and Oxford, England.[br]Principal Honours and DistinctionsPhysical Society Duddell Medal 1955. Franklin Institute Stuart Ballantine Medal 1960. Institute of Electrical and Electronics Engineers David Sarnoff Award 1960. Member of the National Academy of Engineering 1966. Member of the National Academy of Science 1968. Institute of Electrical and Electronics Engineers Medal of Honour 1973. City of Philadelphia John Scott Award 1974. Roentgen Society Silvanus Thompson Medal 1974. President's National medal of Science 1974. Honorary doctorates Vienna 1965, Oxford 1969.Bibliography1944, "Velocity modulated beams", Wireless Engineer 17:262.1942, "Transit time phenomena in electronic tubes", Wireless Engineer 19:3. 1942, "Velocity modulating grids", Wireless Engineer 19:158.1946, "The travelling-wave tube", Wireless Engineer 42:369.1964, The Invention of the TWT, San Francisco: San Francisco Press.Further ReadingJ.R.Pierce, 1992, "History of the microwave tube art", Proceedings of the Institute of Radio Engineers: 980.KF -
9 Pierce, John Robinson
[br]b. 27 March 1910 Des Moines, Iowa, USA[br]American scientist and communications engineer said to be the "father" of communication satellites.[br]From his high-school days, Pierce showed an interest in science and in science fiction, writing under the pseudonym of J.J.Coupling. After gaining Bachelor's, Master's and PhD degrees at the California Institute of Technology (CalTech) in Pasadena in 1933, 1934 and 1936, respectively, Pierce joined the Bell Telephone Laboratories in New York City in 1936. There he worked on improvements to the travelling-wave tube, in which the passage of a beam of electrons through a helical transmission line at around 7 per cent of the speed of light was made to provide amplification at 860 MHz. He also devised a new form of electrostatically focused electron-multiplier which formed the basis of a sensitive detector of radiation. However, his main contribution to electronics at this time was the invention of the Pierce electron gun—a method of producing a high-density electron beam. In the Second World War he worked with McNally and Shepherd on the development of a low-voltage reflex klystron oscillator that was applied to military radar equipment.In 1952 he became Director of Electronic Research at the Bell Laboratories' establishment, Murray Hill, New Jersey. Within two years he had begun work on the possibility of round-the-world relay of signals by means of communication satellites, an idea anticipated in his early science-fiction writings (and by Arthur C. Clarke in 1945), and in 1955 he published a paper in which he examined various possibilities for communications satellites, including passive and active satellites in synchronous and non-synchronous orbits. In 1960 he used the National Aeronautics and Space Administration 30 m (98 1/2 ft) diameter, aluminium-coated Echo 1 balloon satellite to reflect telephone signals back to earth. The success of this led to the launching in 1962 of the first active relay satellite (Telstar), which weighed 170 lb (77 kg) and contained solar-powered rechargeable batteries, 1,000 transistors and a travelling-wave tube capable of amplifying the signal 10,000 times. With a maximum orbital height of 3,500 miles (5,600 km), this enabled a variety of signals, including full bandwidth television, to be relayed from the USA to large receiving dishes in Europe.From 1971 until his "retirement" in 1979, Pierce was Professor of Electrical Engineering at CalTech, after which he became Chief Technologist at the Jet Propulsion Laboratories, also in Pasadena, and Emeritus Professor of Engineering at Stanford University.[br]Principal Honours and DistinctionsInstitute of Electrical and Electronics Engineers Morris N.Liebmann Memorial Award 1947; Edison Medal 1963; Medal of Honour 1975. Franklin Institute Stuart Ballantine Award 1960. National Medal of Science 1963. Danish Academy of Science Valdemar Poulsen Medal 1963. Marconi Award 1974. National Academy of Engineering Founders Award 1977. Japan Prize 1985. Arthur C.Clarke Award 1987. Honorary DEng Newark College of Engineering 1961. Honorary DSc Northwest University 1961, Yale 1963, Brooklyn Polytechnic Institute 1963. Editor, Proceedings of the Institute of Radio Engineers 1954–5.Bibliography23 October 1956, US patent no. 2,768,328 (his development of the travelling-wave tube, filed on 5 November 1946).1947, with L.M.Field, "Travelling wave tubes", Proceedings of the Institute of RadioEngineers 35:108 (describes the pioneering improvements to the travelling-wave tube). 1947, "Theory of the beam-type travelling wave tube", Proceedings of the Institution ofRadio Engineers 35:111. 1950, Travelling Wave Tubes.1956, Electronic Waves and Messages. 1962, Symbols, Signals and Noise.1981, An Introduction to Information Theory: Symbols, Signals and Noise: Dover Publications.1990, with M.A.Knoll, Signals: Revolution in Electronic Communication: W.H.Freeman.KF -
10 Keller, Arthur
[br]b. 18 August 1901 New York City, New York, USA d. 1983[br]American engineer and developer of telephone switching equipment who was instrumental in the development of electromechanical recording and stereo techniques.[br]He obtained a BSc in electrical engineering at Cooper Union for the Advancement of Science and Art, New York, in 1923 and an MSc from Yale University, and he did postgraduate work at Columbia University. Most of the time he was also on the staff of the Bell Telephone Laboratories. The Bell Laboratories and its predecessors had a long tradition in research in speech and hearing, and in a team of researchers under H.C. Harrison, Keller developed a number of definite improvements in electrical pick-ups, gold-sputtering for matrix work and electrical disc recording equipment. From 1931 onwards the team at Bell Labs developed disc recording for moving pictures and entered into collaboration with Leopold Stokowski and the Philadelphia Orchestra concerning transmission and recording of high-fidelity sound over wires, and stereo techniques. Keller developed a stereo recording system for disc records independently of A.D. Blumlein that was used experimentally in the Bell Labs during the 1930s. During the Second World War Keller was in a team developing sonar (sound navigation and ranging) for the US Navy. After the war he concentrated on switching equipment for telephone exchanges and developed a miniature relay. In 1966 he retired from the Bell Laboratories, where he had been Director of several departments, ending as Director of the Switching Apparatus Laboratory. After retirement he was a consultant internationally, concerning electromechanical devices in particular. When, in 1980, the Bell Laboratories decided to issue LP re-recordings of a number of the experimental records made during the 1930s, Keller was brought in from retirement to supervise the project and decide on the selections.[br]BibliographyKeller was inventor or co-inventor of forty patents, including: US patent no. 2,114,471 (the principles of stereo disc recording); US patent no. 2,612,586 (tape guides with air lubrication); US patent no. 3,366,901 (a miniature crossbar switch).Apart from a large number of highly technical papers, Keller also wrote the article "Phonograph" in the 1950 and 1957 editions of Encyclopaedia Britannica.1986, Reflections of a Stereo Pioneer, San Francisco: San Francisco Press (an honest, personal account).GB-N -
11 Townes, Charles Hard
SUBJECT AREA: Electronics and information technology[br]b. 28 July 1915 Greenville, South Carolina, USA[br]American physicist who developed the maser and contributed to the development of the laser.[br]Charles H.Townes entered Furman University, Greenville, at the early age of 16 and in 1935 obtained a BA in modern languages and a BS in physics. After a year of postgraduate study at Duke University, he received a master's degree in physics in 1936. He then went on to the California Institute of Technology, where he obtained a PhD in 1939. From 1939 to 1947 he worked at the Bell Telephone Laboratories, mainly on airborne radar, although he also did some work on radio astronomy. In 1948 he joined Columbia University as Associate Professor of Physics and in 1950 was appointed a full professor. He was Director of the University's Radiation Laboratory from 1950 to 1952, and from 1952 to 1955 he was Chairman of the Physics Department.To meet the need for an oscillator generating very short wavelength electromagnetic radiation, Townes in 1951 realized that use could be made of the different natural energy levels of atoms and molecules. The practical application of this idea was achieved in his laboratory in 1953 using ammonia gas to make the device known as a maser (an acronym of microwave amplification by stimulated emission of radiation). The maser was developed in the next few years and in 1958, in a joint paper with his brother-in-law Arthur L. Schawlow, Townes suggested the possibility of a further development into optical frequencies or an optical maser, later known as a laser (an acronym of light amplification by stimulated emission of radiation). Two years later the first such device was made by Theodore H. Maiman.In 1959 Townes was given leave from Columbia University to serve as Vice-President and Director of Research at the Institute for Defense Analyses until 1961. He was then appointed Provost and Professor of Physics at the Massachusetts Institute of Technology. In 1967 he became University Professor of Physics at the University of California, where he has extended his research interests in the field of microwave and infra-red astronomy. He is a member of the National Academy of Sciences, the Institute of Electrical and Electronics Engineers and the American Astronomical Society.[br]Principal Honours and DistinctionsNobel Prize for Physics 1964. Foreign Member, Royal Society of London. President, American Physical Society 1967. Townes has received many awards from American and other scientific societies and institutions and honorary degrees from more than twenty universities.BibliographyTownes is the author of many scientific papers and, with Arthur L.Schawlow, ofMicrowave Spectroscopy (1955).1980, entry, McGraw-Hill Modern Scientists and Engineers, Part 3, New York, pp. 227– 8 (autobiography).1991, entry, The Nobel Century, London, p. 106 (autobiography).Further ReadingT.Wasson (ed.), 1987, Nobel Prize Winners, New York, pp. 1,071–3 (contains a short biography).RTS -
12 Randall, Sir John Turton
SUBJECT AREA: Medical technology[br]b. 23 March 1905 Newton-le-Willows, Lancashire, Englandd. 16 June 1984 Edinburgh, Scotland[br]English physicist and biophysicist, primarily known for the development, with Boot of the cavity magnetron.[br]Following secondary education at Ashton-inMakerfield Grammar School, Randall entered Manchester University to read physics, gaining a first class BSc in 1925 and his MSc in 1926. From 1926 to 1937 he was a research physicist at the General Electric Company (GEC) laboratories, where he worked on luminescent powders, following which he became Warren Research Fellow of the Royal Society at Birmingham University, studying electronic processes in luminescent solids. With the outbreak of the Second World War he became an honorary member of the university staff and transferred to a group working on the development of centrimetric radar. With Boot he was responsible for the development of the cavity magnetron, which had a major impact on the development of radar.When Birmingham resumed its atomic research programme in 1943, Randall became a temporary lecturer at the Cavendish Laboratory in Cambridge. The following year he was appointed Professor of Natural Philosophy at the University of St Andrews, but in 1946 he moved again to the Wheatstone Chair of Physics at King's College, London. There his developing interest in biophysical research led to the setting up of a multi-disciplinary group in 1951 to study connective tissues and other biological components, and in 1950– 5 he was joint Editor of Progress in Biophysics. From 1961 until his retirement in 1970 he was Professor of Biophysics at King's College and for most of that time he was also Chairman of the School of Biological Sciences. In addition, for many years he was honorary Director of the Medical Research Council Biophysics Research Unit.After he retired he returned to Edinburgh and continued to study biological problems in the university zoology laboratory.[br]Principal Honours and DistinctionsKnighted 1962. FRS 1946. FRS Edinburgh 1972. DSc Manchester 1938. Royal Society of Arts Thomas Gray Memorial Prize 1943. Royal Society Hughes Medal 1946. Franklin Institute John Price Wetherill Medal 1958. City of Pennsylvania John Scott Award 1959. (All jointly with Boot for the cavity magnetron.)Bibliography1934, Diffraction of X-Rays by Amorphous Solids, Liquids \& Gases (describes his early work).1953, editor, Nature \& Structure of Collagen.1976, with H.Boot, "Historical notes on the cavity magnetron", Transactions of the Institute of Electrical and Electronics Engineers ED-23: 724 (gives an account of the cavity-magnetron development at Birmingham).Further ReadingM.H.F.Wilkins, "John Turton Randall"—Bio-graphical Memoirs of Fellows of the Royal Society, London: Royal Society.KFBiographical history of technology > Randall, Sir John Turton
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13 Maiman, Theodore Harold
[br]b. 11 July 1927 Los Angeles, California, USA[br]American physicist who developed the laser.[br]The son of an electrical engineer, Theodore H. Maiman graduated with the degree of BS in engineering physics from the University of Colorado in 1949. He then went on to do postgraduate work at Stanford University, where he gained an MS in electrical engineering in 1951 and a PhD in physics in 1955 for work on spectroscopy using microwave-optical techniques. He then joined the Hughes Research Laboratories, where he worked on the stimulated emission of microwave energy. In this field Charles H. Townes had developed the maser (an acronym of microwave amplification by stimulated emission of radiation) and in a paper in 1958 with Arthur L. Schawlow he had suggested the possibility of a further development into optical frequencies, or, of an optical maser, later known as a laser (an acronym of light amplification by stimulated emission of radiation). Maiman was the first to achieve this when in May 1960 he operated a ruby laser and coherent light was produced for the first time. In 1962 he founded his own company, Korad Corporation, for research, development and manufacture of high-power lasers. He founded Maiman Associates in 1968, acting as consultant on lasers and optics. He was a co-founder of the Laser Video Corporation in 1972, and in 1976 he became Vice-President for advanced technology at TRW Electronics.[br]Principal Honours and DistinctionsFranklin Institute Stuart Ballantine Medal 1962. American Electrical Society/American Astronautical Society Award 1965. American Physical Society Oliver E.Buckley Solid State Physics Prize 1966. Fannie and John Hertz Foundation Award for Applied Physical Science 1966. American Optical Society R.W.Wood Prize 1976.Bibliography1980, entry in McGraw-Hill Modern Scientists and Engineers, Part 2, New York, pp. 271–2 (autobiographical).RTSBiographical history of technology > Maiman, Theodore Harold
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14 Boot, Henry Albert Howard
[br]b. 29 July 1917 Birmingham, Englandd. 8 February 1983 Cambridge, England[br]English physicist who, with John Randall, invented the cavity magnetron used in radar systems.[br]After secondary education at King Edward School, Birmingham, Boot studied physics at Birmingham University, obtaining his BSc in 1938 and PhD in 1941. With the outbreak of the Second World War, he became involved with Randall and others in the development of a source of microwave power suitable for use in radar transmitters. Following unsuccessful attempts to use klystrons, they turned to investigation of the magnetron, and by adding cavity resonators they obtained useful power on 21 February 1940 at a wavelength of 9.8 cm. By May a cavity magnetron radar system had been constructed at TRE, Swanage, and in September submarine periscopes were detected at a range of 7 miles (11 km).In 1943 the physics department at Birmingham resumed its research in atomic physics and Boot moved to BTH at Rugby to continue development of magnetrons, but in 1945 he returned to Birmingham as Nuffield Research Fellow and helped construct the cyclotron there. Three years later he took up a post as a Principal Scientific Officer (PSO) at the Services Electronic Research Laboratories at Baldock, Hertfordshire, becoming a Senior PSO in 1954. He remained there until his retirement in 1977, variously carrying out research on microwaves, magnetrons, plasma physics and lasers.[br]Principal Honours and DistinctionsRoyal Society of Arts Thomas Gray Memorial Prize 1943. Royal Commission Inventors Award 1946. Franklin Institute John Price Wetherill Medal 1958. City of Pennsylvania John Scott Award 1959. (All jointly with Randall.)Bibliography1976, with J.T.Randall, "Historical notes on the cavity magnetron", Transactions of the Institute of Electrical and Electronics Engineers ED-23: 724 (provides an account of their development of the cavity magnetron).Further ReadingE.H.Dix and W.H.Aldous, 1966, Microwave Valves.KFBiographical history of technology > Boot, Henry Albert Howard
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15 Bardeen, John
[br]b. 23 May 1908 Madison, Wisconsin, USAd. 30 January 1991 Boston, Massachusetts, USA[br]American physicist, the first to win the Nobel Prize for Physics twice.[br]Born the son of a professor of anatomy, he studied electrical engineering at the University of Wisconsin. He then worked for three years as a geophysicist at the Gulf Research Laboratories before taking a PhD in mathematical physics at Princeton, where he was a graduate student. For some time he held appointments at the University of Minnesota and at Harvard, and during the Second World War he joined the US Naval Ordnance Laboratory. In 1945 he joined the Bell Telephone Laboratories to head a new department to work on solid-state devices. While there, he and W.H. Brattain in 1948 published a paper that introduced the transistor. For this he, Brattain and Shockley won the Nobel Prize for Physics in 1956. In 1951 he moved to the University of Illinois as Professor of Physics and Electrical Engineering. There he worked on superconductivity, a phenomenon described in 1911 by Kamerling-Onnes. Bardeen worked with L.N. Cooper and J.A.Schrieffer, and in 1972 they were awarded the Nobel Prize for Physics for the "BCS Theory", which suggested that, under certain circumstances at very low temperatures, electrons can form bound pairs.[br]Principal Honours and DistinctionsNobel Prize for Physics (jointly with Brattain and Shockley) 1956, (jointly with Cooper and Schrieffer) 1972.Further ReadingIsaacs and E.Martin (eds), 1985, Longmans Dictionary of 20th Century Biography.IMcN -
16 Schawlow, Arthur Leonard
[br]b. 5 May 1921 Mount Vernon, New York, USA[br]American physicist involved in laser-spectroscopy research.[br]When Arthur L.Schawlow was 3 years old his family moved to Canada: it was in Toronto that he received his education, graduating from the University of Toronto with a BA in physics in 1941. He was awarded an MA in 1942, taught classes for military personnel at the University until 1944 and worked for a year on radar equipment. He returned to the University of Toronto in 1945 to carry out research on optical spectroscopy and received his PhD in 1949. From 1949 to 1951 he held a postgraduate fellowship at Columbia University, where he worked with Charles H. Townes on microwave spectroscopy. From 1951 to 1961 he was a research physicist at the Bell Telephone Laboratories, working mainly on superconductivity, but he maintained his association with Townes, who had pioneered the maser (an acronym of microwave amplification by stimulated emission of radiation). In a paper published in Physical Review in December 1958, Townes and Schawlow suggested the possibility of a development into optical frequencies or an optical maser, later known as a laser (an acronym of light amplification by stimulated emission of radiation). In 1960 the first such device was made by Theodore H. Maiman. In 1960 Schawlow returned to Columbia University as a visiting professor and in the following year was appointed Professor of Physics at Stanford University, where he continued his researches in laser spectroscopy. He is a member of the National Academy of Sciences, the American Physical Society, the Optical Society of America and the Institute of Electrical and Electronic Engineers.[br]Principal Honours and DistinctionsNobel Prize for Physics 1981. Franklin Institute Stuart Ballantine Medal 1962. Institute of Physics of London Thomas Young Medal and Prize 1963. Institute of Electrical and Electronics Engineers Morris N.Liebmann Memorial Prize 1964. Optical Society of America Frederick Ives Medal 1976. Honorary degrees from the State University of Ghent, the University of Bradford and the University of Toronto.BibliographySchawlow is the author of many scientific papers and, with Charles H.Townes, ofMicrowave Spectroscopy (1955).Further ReadingT.Wasson (ed.), 1987, Nobel Prize Winners, New York, pp. 930–3 (contains a short biography).RTSBiographical history of technology > Schawlow, Arthur Leonard
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17 Black, Harold Stephen
[br]b. 14 April 1898 Leominster, Massachusetts, USAd. 11 December 1983 Summitt, New Jersey, USA[br]American electrical engineer who discovered that the application of negative feedback to amplifiers improved their stability and reduced distortion.[br]Black graduated from Worcester Polytechnic Institute, Massachusetts, in 1921 and joined the Western Electric Company laboratories (later the Bell Telephone Laboratories) in New York City. There he worked on a variety of electronic-communication problems. His major contribution was the discovery in 1927 that the application of negative feedback to an amplifier, whereby a fraction of the output signal is fed back to the input in the opposite phase, not only increases the stability of the amplifier but also has the effect of reducing the magnitude of any distortion introduced by it. This discovery has found wide application in the design of audio hi-fi amplifiers and various control systems, and has also given valuable insight into the way in which many animal control functions operate.During the Second World War he developed a form of pulse code modulation (PCM) to provide a practicable, secure telephony system for the US Army Signal Corps. From 1963–6, after his retirement from the Bell Labs, he was Principal Research Scientist with General Precision Inc., Little Falls, New Jersey, following which he became an independent consultant in communications. At the time of his death he held over 300 patents.[br]Principal Honours and DistinctionsInstitute of Electronic and Radio Engineers Lamme Medal 1957.Bibliography1934, "Stabilised feedback amplifiers", Electrical Engineering 53:114 (describes the principles of negative feedback).21 December 1937, US patent no. 2,106,671 (for his negative feedback discovery.1947, with J.O.Edson, "Pulse code modulation", Transactions of the American Institute of Electrical Engineers 66:895.1946, "A multichannel microwave radio relay system", Transactions of the American Institute of Electrical Engineers 65:798.1953, Modulation Theory, New York: D.van Nostrand.1988, Laboratory Management: Principles \& Practice, New York: Van Nostrand Rheinhold.Further ReadingFor early biographical details see "Harold S. Black, 1957 Lamme Medalist", Electrical Engineering (1958) 77:720; "H.S.Black", Institute of Electrical and Electronics Engineers Spectrum (1977) 54.KF -
18 Alexanderson, Ernst Frederik Werner
[br]b. 25 January 1878 Uppsala, Swedend. ? May 1975 Schenectady, New York, USA[br]Swedish-American electrical engineer and prolific radio and television inventor responsible for developing a high-frequency alternator for generating radio waves.[br]After education in Sweden at the High School and University of Lund and the Royal Institution of Technology in Stockholm, Alexanderson took a postgraduate course at the Berlin-Charlottenburg Engineering College. In 1901 he began work for the Swedish C \& C Electric Company, joining the General Electric Company, Schenectady, New York, the following year. There, in 1906, together with Fessenden, he developed a series of high-power, high-frequency alternators, which had a dramatic effect on radio communications and resulted in the first real radio broadcast. His early interest in television led to working demonstrations in his own home in 1925 and at the General Electric laboratories in 1927, and to the first public demonstration of large-screen (7 ft (2.13 m) diagonal) projection TV in 1930. Another invention of significance was the "amplidyne", a sensitive manufacturing-control system subsequently used during the Second World War for controlling anti-aircraft guns. He also contributed to developments in electric propulsion and radio aerials.He retired from General Electric in 1948, but continued television research as a consultant for the Radio Corporation of America (RCA), filing his 321st patent in 1955.[br]Principal Honours and DistinctionsInstitution of Radio Engineers Medal of Honour 1919. President, IERE 1921. Edison Medal 1944.BibliographyPublications relating to his work in the early days of radio include: "Magnetic properties of iron at frequencies up to 200,000 cycles", Transactions of the American Institute of Electrical Engineers (1911) 30: 2,443."Transatlantic radio communication", Transactions of the American Institute of ElectricalEngineers (1919) 38:1,269.The amplidyne is described in E.Alexanderson, M.Edwards and K.Boura, 1940, "Dynamo-electric amplifier for power control", Transactions of the AmericanInstitution of Electrical Engineers 59:937.Further ReadingE.Hawkes, 1927, Pioneers of Wireless, Methuen (provides an account of Alexanderson's work on radio).J.H.Udelson, 1982, The Great Television Race: A History of the American Television Industry 1925–1941, University of Alabama Press (provides further details of his contribution to the development of television).KFBiographical history of technology > Alexanderson, Ernst Frederik Werner
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19 Carlson, Chester Floyd
SUBJECT AREA: Photography, film and optics[br]b. 8 July 1906 Seattle, Washington, USAd. 19 September 1968 New York, USA[br][br]Carlson studied physics at the California Institute of Technology and in 1930 he took a research position at Bell Telephone Laboratories, but soon transferred to their patent department. To equip himself in this field, Carlson studied law, and in 1934 he became a patent attorney at P.R.Mallory \& Co., makers of electrical apparatus. He was struck by the difficulty in obtaining copies of documents and drawings; indeed, while still at school, he had encountered printing problems in trying to produce a newsletter for amateur chemists. He began experimenting with various light-sensitive substances, and by 1937 he had conceived the basic principles of xerography ("dry writing"), using the property of certain substances of losing an electrostatic charge when light impinges on them. His work for Mallory brought him into contact with the Battelle Memorial Institute, the world's largest non-profit research organization; their subsidiary, set up to develop promising ideas, took up Carlson's invention. Carlson received his first US patent for the process in 1940, with two more in 1942, and he assigned to Battelle exclusive patent rights in return for a share of any future proceeds. It was at Battelle that selenium was substituted as the light-sensitive material.In 1946 the Haloid Company of Rochester, manufacturers of photographic materials and photocopying equipment, heard of the Xerox copier and, seeing it as a possible addition to their products, took out a licence to develop it commercially. The first Xerox Copier was tested during 1949 and put on the market the following year. The process soon began to displace older methods, such as Photostat, but its full impact on the public came in 1959 with the advent of the Xerox 914 Copier. It is fair to apply the overworked word "revolution" to the change in copying methods initiated by Carlson. He became a multimillionaire from his royalties and stock holding, and in his last years he was able to indulge in philanthropic activities.[br]Further ReadingObituary, 1968, New York Times, 20 September.R.M.Schaffert, 1954, "Developments in xerography", Penrose Annual.J.Jewkes, 1969, The Sources of Invention, 2nd edn, London: Macmillan, pp. 405–8.LRD -
20 Carothers, Wallace Hume
[br]b. 27 April 1896 Burlington, Iowa, USAd. 29 April 1937 Philadelphia, Pennsylvania, USA[br]American chemist, inventor of nylon.[br]After graduating in chemistry, Carothers embarked on academic research at several universities, finally at Harvard University. His earliest published papers, from 1923, heralded the brilliance and originality of his later work. In 1928, Du Pont de Nemours persuaded him to forsake the academic world to lead their new organic-chemistry group in a programme of fundamental research at their central laboratories at Wilmington, Delaware. The next nine years were extraordinarily productive, yielding important contributions to theoretical organic chemistry and the foundation of two branches of chemical industry, namely the production of synthetic rubber and of wholly synthetic fibres.Carothers began work on high molecular weight substances yielding fibres and introduced polymerization by condensation: polymerization by addition was already known. He developed a clear understanding of the relation between the repeating structural units in a large molecule and its physical chemical properties. In 1931, Carothers found that chloroprene could be polymerized much faster than isoprene, the monomer in natural rubber. This process yielded polychloroprene or neoprene, a synthetic rubber with improved properties. Manufacture began the following year, and the material has continued to be used for speciality rubbers.There followed many publications announcing new condensations polymers. On 2 January 1935, he obtained a patent for the formation of new polyamides, including one from adipic acid and hexamethylenediamene. After four years of development work, which cost Du Pont some $27 million, this new polyamide, or nylon, reached the stage of commercial production, beginning on 23 October 1938. Nylon stockings appeared the following year and 64 million were sold during the first twelve months. However, Carothers saw none of this spectacular success: he had died by his own hand in 1937, after a long history of gradually intensifying depression.[br]Principal Honours and DistinctionsElected to the National Academy of Science 1936 (he was the first industrial organic chemist to be so honoured).BibliographyH.M.Whitby and G.S.Whitby, 1940, Collected Papers of Wallace H.Carothers on Polymerisation, New York.Further ReadingR.Adams, 1939, memoir, Biographical Memoirs of the National Academy of Sciences 20:293–309 (includes a complete list of Carothers's sixty-two scientific papers and most of his sixty-nine US patents).LRDBiographical history of technology > Carothers, Wallace Hume
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