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1 Bond, George Meade
SUBJECT AREA: Mechanical, pneumatic and hydraulic engineering[br]b. 17 July 1852 Newburyport, Massachusetts, USAd. 6 January 1935 Hartford, Connecticut, USA[br]American mechanical engineer and metrologist, co-developer of the Rogers- Bond Comparator.[br]After leaving school at the age of 17, George Bond taught in local schools for a few years before starting an apprenticeship in a machine shop in Grand Rapids, Michigan. He then worked as a machinist with Phoenix Furniture Company in that city until his savings permitted him to enter the Stevens Institute of Technology at Hoboken, New Jersey, in 1876. He graduated with the degree of Mechanical Engineer in 1880. In his final year he assisted William A.Rogers, Professor of Astronomy at Harvard College Observatory, Cambridge, Massachusetts, in the design of a comparator for checking standards of length. In 1880 he joined the Pratt \& Whitney Company, Hartford, Connecticut, and was Manager of the Standards and Gauge Department from then until 1902. During this period he developed cylindrical, calliper, snap, limit, thread and other gauges. He also designed the Bond Standard Measuring Machine. Bond was elected a member of the American Society of Mechanical Engineers in 1881 and of the American Society of Civil Engineers in 1887, and served on many of their committees relating to standards and units of measurement.[br]Principal Honours and DistinctionsVice-President, American Society of Mechanical Engineers 1908–10. Honorary degrees of DEng, Stevens Institute of Technology 1921, and MSc, Trinity College, Hartford, 1927.Bibliography1881. "Standard measurements", Transactions of the American Society of Mechanical Engineers 2:81.1882. "A standard gauge system", Transactions of the American Society of MechanicalEngineers 3:122.1886, "Standard pipe and pipe threads", Transactions of the American Society of Mechanical Engineers 7:311.1887. Standards of Length and Their Practical Application, Hartford.Further Reading"Report of the Committee on Standards and Gauges", 1883, Transactions of the American Society of Mechanical Engineers 4:21–9 (describes the Rogers-Bond Comparator).RTS -
2 Alden, George I.
SUBJECT AREA: Mechanical, pneumatic and hydraulic engineering[br]b. 22 April 1843 Templeton, Massachusetts, USAd. 13 September 1926 Princeton, Massachusetts, USA[br]American mechanical engineer and professor of engineering.[br]From 1868 to 1896 George Alden was head of the steam and mechanical engineering departments at the Worcester Polytechnic Institute, Worcester, Massachusetts. He made a donation in 1910 to establish a hydraulic laboratory at the Institute, and later a further donation for an extension of the laboratory which was completed in 1925. He was Chairman of the Board of Norton (Abrasives) Company and made a significant contribution to the theory of grinding in his paper in 1914 to the American Society of Mechanical Engineers. He was a member of that society from 1880, the year of its foundation, and took an active part in its proceedings.[br]Principal Honours and DistinctionsVice-President, American Society of Mechanical Engineers 1891–3.Bibliography1914, "Operation of grinding wheels in machine grinding", Transactions of the American Society of Mechanical Engineers 36:451–60.Further ReadingFor a description of the Alden Hydraulic Laboratory, see Mechanical Engineering, June 1926: 634–5.RTS -
3 Haynes, Elwood
[br]b. 14 October 1857 Portland, Indiana, USAd. 13 April 1925 Kokomo, Indiana, USA[br]American inventor ofStellite cobalt-based alloys, early motor-car manufacturer and pioneer in stainless steels.[br]From his early years, Haynes was a practising Presbyterian and an active prohibitionist. He graduated in 1881 at Worcester, Massachusetts, and a spell of teaching in his home town was interrupted in 1884–5 while he attended the Johns Hopkins University in Baltimore. In 1886 he became permanently diverted by the discovery of natural gas in Portland. He was soon appointed Superintendent of the local gas undertaking, and then in 1890 he was hired by the Indiana Natural Gas \& Oil Company. While continuing his gas-company employment until 1901, Haynes conducted numerous metallurgical experiments. He also designed an automobile: this led to the establishment of the Haynes- Apperson Company at Kokomo as one of the earliest motor-car makers in North America. From 1905 the firm traded as the Haynes Automobile Company, and before its bankruptcy in 1924 it produced more than 50,000 cars. After 1905, Haynes found the first "Stellite" alloys of cobalt and chromium, and in 1910 he was publicizing the patented material. He then discovered the valuable hardening effect of tungsten, and in 1912 began applying the "improved" Stellite to cutting tools. Three years later, the Haynes Stellite Company was incorporated, with Haynes as President, to work the patents. It was largely from this source that Haynes became a millionaire in 1920. In April 1912, Haynes's attempt to patent the use of chromium with iron to render the product rustless was unsuccessful. However, he re-applied for a US patent on 12 March 1915 and, although this was initially rejected, he persevered and finally obtained recognition of his modified claim. The American Stainless Steel Company licensed the patents of Brearley and Haynes jointly in the USA until the 1930s.[br]Principal Honours and DistinctionsJohn Scott Medal 1919 (awarded for useful inventions).BibliographyHaynes was the author of more than twenty published papers and articles, among them: 1907, "Materials for automobiles", Proceedings of the American Society of MechanicalEngineers 29:1,597–606; 1910, "Alloys of nickel and cobalt with chromium", Journal of Industrial Engineeringand Chemistry 2:397–401; 1912–13, "Alloys of cobalt with chromium and other metals", Transactions of the American Institute of 'Mining Engineers 44:249–55;1919–20, "Stellite and stainless steel", Proceedings of the Engineering Society of WestPennsylvania 35:467–74.1 April 1919, US patent no. 1,299,404 (stainless steel).The four US patents worked by the Haynes Stellite Company were: 17 December 1907, patent no. 873,745.1 April 1913, patent no. 1,057,423.1 April 1913, patent no. 1,057, 828.17 August 1915, patent no. 1,150, 113.Further ReadingR.D.Gray, 1979, Alloys and Automobiles. The Life of Elwood Haynes, Indianapolis: Indiana Historical Society (a closely documented biography).JKA -
4 Bodmer, Johann Georg
SUBJECT AREA: Mechanical, pneumatic and hydraulic engineering, Railways and locomotives, Steam and internal combustion engines, Textiles, Weapons and armour[br]b. 9 December 1786 Zurich, Switzerlandd. 30 May 1864 Zurich, Switzerland[br]Swiss mechanical engineer and inventor.[br]John George Bodmer (as he was known in England) showed signs of great inventive ability even as a child. Soon after completing his apprenticeship to a local millwright, he set up his own work-shop at Zussnacht. One of his first inventions, in 1805, was a shell which exploded on impact. Soon after this he went into partnership with Baron d'Eichthal to establish a cotton mill at St Blaise in the Black Forest. Bodmer designed the water-wheels and all the machinery. A few years later they established a factory for firearms and Bodmer designed special machine tools and developed a system of interchangeable manufacture comparable with American developments at that time. More inventions followed, including a detachable bayonet for breech-loading rifles and a rifled, breech-loading cannon for 12 lb (5.4 kg) shells.Bodmer was appointed by the Grand Duke of Baden to the posts of Director General of the Government Iron Works and Inspector of Artillery. He left St Blaise in 1816 and entered completely into the service of the Grand Duke, but before taking up his duties he visited Britain for the first time and made an intensive five-month tour of textile mills, iron works, workshops and similar establishments.In 1821 he returned to Switzerland and was engaged in setting up cotton mills and other engineering works. In 1824 he went back to England, where he obtained a patent for his improvements in cotton machinery and set up a mill near Bolton incorporating his ideas. His health failing, he was obliged to return to Switzerland in 1828, but he was soon busy with engineering works there and in France. In 1833 he went to England again, first to Bolton and four years later to Manchester in partnership with H.H.Birley. In the next ten years he patented many more inventions in the fields of textile machinery, steam engines and machine tools. These included a balanced steam engine, a mechanical stoker, steam engine valve gear, gear-cutting machines and a circular planer or vertical lathe, anticipating machines of this type later developed in America by E.P. Bullard. The metric system was used in his workshops and in gearing calculations he introduced the concept of diametral pitch, which then became known as "Manchester Pitch". The balanced engine was built in stationary form and in two locomotives, but although their running was remarkably smooth the additional complication prevented their wider use.After the death of H.H.Birley in 1846, Bodmer removed to London until 1848, when he went to Austria. About 1860 he returned to his native town of Zurich. He remained actively engaged in all kinds of inventions up to the end of his life. He obtained fourteen British patents, each of which describes many inventions; two of these patents were extended beyond the normal duration of fourteen years. Two others were obtained on his behalf, one by his brother James in 1813 for his cannon and one relating to railways by Charles Fox in 1847. Many of his inventions had little direct influence but anticipated much later developments. His ideas were sound and some of his engines and machine tools were in use for over sixty years. He was elected a Member of the Institution of Civil Engineers in 1835.[br]Bibliography1845, "The advantages of working stationary and marine engines with high-pressure steam, expansively and at great velocities; and of the compensating, or double crank system", Minutes of the Proceedings of the Institution of Civil Engineers 4:372–99.1846, "On the combustion of fuel in furnaces and steam-boilers, with a description of Bodmer's fire-grate", Minutes of the Proceedings of the Institution of Civil Engineers 5:362–8.Further ReadingObituary, 1868–9, Minutes of the Proceedings of the Institution of Civil Engineers 28:573–608.H.W.Dickinson, 1929–30, "Diary of John George Bodmer, 1816–17", Transactions of the Newcomen Society 10:102–14.D.Brownlie, 1925–6, John George Bodmer, his life and work, particularly in relation to the evolution of mechanical stoking', Transactions of the Newcomen Society 6:86–110.W.O.Henderson (ed.), 1968, Industrial Britain Under the Regency: The Diaries of Escher, Bodmer, May and de Gallois 1814–1818, London: Frank Cass (a more complete account of his visit to Britain).RTS -
5 Fox, Samson
SUBJECT AREA: Mechanical, pneumatic and hydraulic engineering, Metallurgy, Steam and internal combustion engines[br]b. 11 July 1838 Bowling, near Bradford, Yorkshire, Englandd. 24 October 1903 Walsall, Staffordshire, England[br]English engineer who invented the corrugated boiler furnace.[br]He was the son of a cloth mill worker in Leeds and at the age of 10 he joined his father at the mill. Showing a mechanical inclination, he was apprenticed to a firm of machine-tool makers, Smith, Beacock and Tannett. There he rose to become Foreman and Traveller, and designed and patented tools for cutting bevelled gears. With his brother and one Refitt, he set up the Silver Cross engineering works for making special machine tools. In 1874 he founded the Leeds Forge Company, acting as Managing Director until 1896 and then as Chairman until shortly before his death.It was in 1877 that he patented his most important invention, the corrugated furnace for steam-boilers. These furnaces could withstand much higher pressures than the conventional form, and higher working pressures in marine boilers enabled triple-expansion engines to be installed, greatly improving the performance of steamships, and the outcome was the great ocean-going liners of the twentieth century. The first vessel to be equipped with the corrugated furnace was the Pretoria of 1878. At first the furnaces were made by hammering iron plates using swage blocks under a steam hammer. A plant for rolling corrugated plates was set up at Essen in Germany, and Fox installed a similar mill at his works in Leeds in 1882.In 1886 Fox installed a Siemens steelmaking plant and he was notable in the movement for replacing wrought iron with steel. He took out several patents for making pressed-steel underframes for railway wagons. The business prospered and Fox opened a works near Chicago in the USA, where in addition to wagon underframes he manufactured the first American pressed-steel carriages. He later added a works at Pittsburgh.Fox was the first in England to use water gas for his metallurgical operations and for lighting, with a saving in cost as it was cheaper than coal gas. He was also a pioneer in the acetylene industry, producing in 1894 the first calcium carbide, from which the gas is made.Fox took an active part in public life in and around Leeds, being thrice elected Mayor of Harrogate. As a music lover, he was a benefactor of musicians, contributing no less than £45,000 towards the cost of building the Royal College of Music in London, opened in 1894. In 1897 he sued for libel the author Jerome K.Jerome and the publishers of the Today magazine for accusing him of misusing his great generosity to the College to give a misleading impression of his commercial methods and prosperity. He won the case but was not awarded costs.[br]Principal Honours and DistinctionsRoyal Society of Arts James Watt Silver Medal and Howard Gold Medal. Légion d'honneur 1889.Bibliography1877, British Patent nos. 1097 and 2530 (the corrugated furnace or "flue", as it was often called).Further ReadingObituary, 1903, Proceedings of the Institution of Mechanical Engineers: 919–21.Obituary, 1903, Proceedings of the Institution of Civil Engineers (the fullest of the many obituary notices).G.A.Newby, 1993, "Behind the fire doors: Fox's corrugated furnace 1877 and the high pressure steamship", Transactions of the Newcomen Society 64.LRD -
6 Jenkins, Charles Francis
[br]b. 1867 USAd. 1934 USA[br]American pioneer of motion pictures and television.[br]During the early years of the motion picture industry, Jenkins made many innovations, including the development in 1894 of his own projector, the "Phantoscope", which was widely used for a number of years. In the same year he also suggested the possibility of electrically transmitting pictures over a distance, an interest that led to a lifetime of experimentation. As a result of his engineering contributions to the practical realization of moving pictures, in 1915 the National Motion Picture Board of Trade asked him to chair a committee charged with establishing technical standards for the industry. This in turn led to his proposing the creation of a professional society for those engineers in the industry, and the following year the Society of Motion Picture Engineers (later to become the Society of Motion Picture and Television Engineers) was formed, with Jenkins as its first President. Soon after this he began experiments with mechanical television, using both the Nipkow hole-spiral disc and a low-definition system of his own, based on rotating bevelled glass discs (his so-called "prismatic rings") and alkali-metal photocells. In the 1920s he gave many demonstrations of mechanical television, including a cable transmission of a crude silhouette of President Harding from Washington, DC, to Philadelphia in 1923 and a radio broadcast from Washington in 1928. The following year he formed the Jenkins Television Company to make television transmitters and receivers, but it soon went into debt and was acquired by the de Forest Company, from whom RCA later purchased the patents.[br]Principal Honours and DistinctionsFirst President, Society of Motion Picture Engineers 1916.Bibliography1923, "Radio photographs, radio movies and radio vision", Transactions of the Society of Motion Picture Engineers 16:78.1923, "Recent progress in the transmission of motion pictures by radio", Transactions ofthe Society of Motion Picture Engineers 17:81.1925, "Radio movies", Transactions of the Society of Motion Picture Engineers 21:7. 1930, "Television systems", Journal of the Society of Motion Picture Engineers 15:445. 1925. Vision by Radio.Further ReadingJ.H.Udelson, 1982, The Great Television Race: A History of the American Television Industry, 1925–41: University of Alabama Press.R.W.Hubbell, 1946, 4,000 Years of Television, London: G.Harrap \& Sons.1926. "The Jenkins system", Wireless World 18: 642 (contains a specific account of Jenkins's work).KFBiographical history of technology > Jenkins, Charles Francis
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7 De Forest, Lee
SUBJECT AREA: Broadcasting, Electronics and information technology, Photography, film and optics, Recording, Telecommunications[br]b. 26 August 1873 Council Bluffs, Iowa, USAd. 30 June 1961 Hollywood, California, USA[br]American electrical engineer and inventor principally known for his invention of the Audion, or triode, vacuum tube; also a pioneer of sound in the cinema.[br]De Forest was born into the family of a Congregational minister that moved to Alabama in 1879 when the father became President of a college for African-Americans; this was a position that led to the family's social ostracism by the white community. By the time he was 13 years old, De Forest was already a keen mechanical inventor, and in 1893, rejecting his father's plan for him to become a clergyman, he entered the Sheffield Scientific School of Yale University. Following his first degree, he went on to study the propagation of electromagnetic waves, gaining a PhD in physics in 1899 for his thesis on the "Reflection of Hertzian Waves from the Ends of Parallel Wires", probably the first US thesis in the field of radio.He then joined the Western Electric Company in Chicago where he helped develop the infant technology of wireless, working his way up from a modest post in the production area to a position in the experimental laboratory. There, working alone after normal working hours, he developed a detector of electromagnetic waves based on an electrolytic device similar to that already invented by Fleming in England. Recognizing his talents, a number of financial backers enabled him to set up his own business in 1902 under the name of De Forest Wireless Telegraphy Company; he was soon demonstrating wireless telegraphy to interested parties and entering into competition with the American Marconi Company.Despite the failure of this company because of fraud by his partners, he continued his experiments; in 1907, by adding a third electrode, a wire mesh, between the anode and cathode of the thermionic diode invented by Fleming in 1904, he was able to produce the amplifying device now known as the triode valve and achieve a sensitivity of radio-signal reception much greater than possible with the passive carborundum and electrolytic detectors hitherto available. Patented under the name Audion, this new vacuum device was soon successfully used for experimental broadcasts of music and speech in New York and Paris. The invention of the Audion has been described as the beginning of the electronic era. Although much development work was required before its full potential was realized, the Audion opened the way to progress in all areas of sound transmission, recording and reproduction. The patent was challenged by Fleming and it was not until 1943 that De Forest's claim was finally recognized.Overcoming the near failure of his new company, the De Forest Radio Telephone Company, as well as unsuccessful charges of fraudulent promotion of the Audion, he continued to exploit the potential of his invention. By 1912 he had used transformer-coupling of several Audion stages to achieve high gain at radio frequencies, making long-distance communication a practical proposition, and had applied positive feedback from the Audion output anode to its input grid to realize a stable transmitter oscillator and modulator. These successes led to prolonged patent litigation with Edwin Armstrong and others, and he eventually sold the manufacturing rights, in retrospect often for a pittance.During the early 1920s De Forest began a fruitful association with T.W.Case, who for around ten years had been working to perfect a moving-picture sound system. De Forest claimed to have had an interest in sound films as early as 1900, and Case now began to supply him with photoelectric cells and primitive sound cameras. He eventually devised a variable-density sound-on-film system utilizing a glow-discharge modulator, the Photion. By 1926 De Forest's Phonofilm had been successfully demonstrated in over fifty theatres and this system became the basis of Movietone. Though his ideas were on the right lines, the technology was insufficiently developed and it was left to others to produce a system acceptable to the film industry. However, De Forest had played a key role in transforming the nature of the film industry; within a space of five years the production of silent films had all but ceased.In the following decade De Forest applied the Audion to the development of medical diathermy. Finally, after spending most of his working life as an independent inventor and entrepreneur, he worked for a time during the Second World War at the Bell Telephone Laboratories on military applications of electronics.[br]Principal Honours and DistinctionsInstitute of Electronic and Radio Engineers Medal of Honour 1922. President, Institute of Electronic and Radio Engineers 1930. Institute of Electrical and Electronics Engineers Edison Medal 1946.Bibliography1904, "Electrolytic detectors", Electrician 54:94 (describes the electrolytic detector). 1907, US patent no. 841,387 (the Audion).1950, Father of Radio, Chicago: WIlcox \& Follett (autobiography).De Forest gave his own account of the development of his sound-on-film system in a series of articles: 1923. "The Phonofilm", Transactions of the Society of Motion Picture Engineers 16 (May): 61–75; 1924. "Phonofilm progress", Transactions of the Society of Motion Picture Engineers 20:17–19; 1927, "Recent developments in the Phonofilm", Transactions of the Society of Motion Picture Engineers 27:64–76; 1941, "Pioneering in talking pictures", Journal of the Society of Motion Picture Engineers 36 (January): 41–9.Further ReadingG.Carneal, 1930, A Conqueror of Space (biography).I.Levine, 1964, Electronics Pioneer, Lee De Forest (biography).E.I.Sponable, 1947, "Historical development of sound films", Journal of the Society of Motion Picture Engineers 48 (April): 275–303 (an authoritative account of De Forest's sound-film work, by Case's assistant).W.R.McLaurin, 1949, Invention and Innovation in the Radio Industry.C.F.Booth, 1955, "Fleming and De Forest. An appreciation", in Thermionic Valves 1904– 1954, IEE.V.J.Phillips, 1980, Early Radio Detectors, London: Peter Peregrinus.KF / JW -
8 Blackett, William Cuthbert
SUBJECT AREA: Mining and extraction technology[br]b. 18 November 1859 Durham, Englandd. 13 June 1935 Durham, England[br]English mine manager, expert in preventing mine explosions and inventor of a coal-face conveyor.[br]After leaving Durham college of Physical Science and having been apprenticed in different mines, he received the certificate for colliery managers and subsequently, in 1887, was appointed Manager of all the mines of Charlaw and Sacriston collieries in Durham. He remained in this position for the rest of his working life.Frequent explosions in mines led him to investigate the causes. He was among the first to recognize the role contributed by coal-dust on mine roads, pioneered the use of inert rock-or stone-dust to render the coal-dust harmless and was the originator of many technical terms on the subject. He contributed many papers on explosion and was appointed a member of many advisory committees on prevention measures. A liquid-air rescue apparatus, designed by him and patented in 1910, was installed in various parts of the country.Blackett also developed various new devices in mining machinery. He patented a wire-rope socket which made use of a metal wedge; invented a rotary tippler driven by frictional contact instead of gearing and which stopped automatically; and he designed a revolving cylindrical coal-washer, which also gained interest among German mining engineers. His most important invention, the first successful coal-face conveyor, was patented in 1902. It was driven by compressed air and consisted of a trough running along the length of the race through which ran an endless scraper chain. Thus fillers cast the coal into the trough, and the scraper chain drew it to the main gate to be loaded into trams.[br]Principal Honours and DistinctionsKnight of Grace of the Order of St John of Jerusalem. OBE. Honorary MSc University of Durham; Honorary LLD University of Birmingham. Honorary Member, Institution of Mining and Metallurgy. Honorary Member, American Institute of Mining and Metallurgical Engineers. Royal Humane Society Medal.Further ReadingTransactions of the Institution of Mining Engineers (1934–5) 89:339–41.Mining Association of Great Britain (ed.), 1924, Historical Review of Coal Mining London (describes early mechanical devices for the extraction of coal).WKBiographical history of technology > Blackett, William Cuthbert
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