he+is+master+of+this+subject

SUBJECT AREA: Aerospace, Electronics and information technology, Telecommunications

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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.

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SUBJECT AREA: Broadcasting, Electronics and information technology

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After his initial engineering education at Kiev Polytechnic, Shoenberg went to London to undertake further studies at the Royal College of Science. In 1905 he returned to Russia and rose to become Chief Engineer of the Russian Wireless Telegraphy Company. He then returned to England, where he was a consultant in charge of the Patent Department and then joint General Manager of the Marconi Wireless Telegraphy Company (see Marconi). In 1929 he joined the Columbia Graphophone Company, but two years later this amalgamated with the Gramophone Company, by then known as His Master's voice (HMV), to form EMI (Electric and Musical Industries), a company in which the Radio Corporation of America (RCA) had a significant shareholding. Appointed Director of the new company's Research Laboratories in 1931, Shoenberg gathered together a team of highly skilled engineers, including Blumlein, Browne, Willans, McGee, Lubszynski, Broadway and White, with the objective of producing an all-electronic television system suitable for public broadcasting. A 150-line system had already been demonstrated using film as the source material; a photoemissive camera tube similar to Zworykin's iconoscope soon followed. With alternate demonstrations of the EMI system and the mechanical system of Baird arranged with the object of selecting a broadcast system for the UK, Shoenberg took the bold decision to aim for a 405-line "high-definition" standard, using interlaced scanning based on an RCA patent and further developed by Blumlein. This was so successful that it was formally adopted as the British standard in 1935 and regular broadcasts, the first in the world, began in 1937. It is a tribute to Shoenberg's vision and the skills of his team that this standard was to remain in use, apart from the war years, until finally superseded in 1985.

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See also: Baird, John Logie; Campbell-Swinton, Alan Archibald

SUBJECT AREA: Architecture and building

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Sullivan, a Bostonian, studied at the Massachusetts Institute of Technology. Soon he joined his parents, who had moved to Chicago, and worked for a while in the office of William Le Baron Jenney, the pioneer of steel-frame construction. After spending some time studying at the Ecole des Beaux Arts in Paris, in 1875 Sullivan returned to Chicago, where he later met and worked for the Danish architect Dankmar Adler, who was practising there. In 1881 the two architects became partners, and during the succeeding fifteen years they produced their finest work and the buildings for which Sullivan is especially known.

During the early 1880s in Chicago, load-bearing, metal-framework structures that made lofty skyscrapers possible had been developed (see Jenney and Holabird). Louis H.Sullivan initiated building design to stress and complement the metal structure rather than hide it. Moving onwards from H.H.Richardson's treatment of his Marshall Field Wholesale Store in Chicago, Sullivan took the concept several stages further. His first outstanding work, built with Adler in 1886–9, was the Auditorium Building in Chicago. The exterior, in particular, was derived largely from Richardson's Field Store, and the building—now restored—is of bold but simple design, massively built in granite and stone, its form stressing the structure beneath. The architects' reputation was established with this building.

The firm of Sullivan \& Adler established itself during the early 1890s, when they built their most famous skyscrapers. Adler was largely responsible for the structure, the acoustics and function, while Sullivan was responsible for the architectural design, concerning himself particularly with the limitation and careful handling of ornament. In 1892 he published his ideas in Ornament in Architecture, where he preached restraint in its quality and disposition. He established himself as a master of design in the building itself, producing a rhythmic simplicity of form, closely related to the structural shape beneath. The two great examples of this successful approach were the Wainwright Building in St Louis, Missouri (1890–1) and the Guaranty Building in Buffalo, New York (1894–5). The Wainwright Building was a ten-storeyed structure built in stone and brick and decorated with terracotta. The vertical line was stressed throughout but especially at the corners, where pilasters were wider. These rose unbroken to an Art Nouveau type of decorative frieze and a deeply projecting cornice above. The thirteen-storeyed Guaranty Building is Sullivan's masterpiece, a simple, bold, finely proportioned and essentially modern structure. The pilaster verticals are even more boldly stressed and decoration is at a minimum. In the twentieth century the almost free-standing supporting pillars on the ground floor have come to be called pilotis. As late as the 1920s, particularly in New York, the architectural style and decoration of skyscrapers remained traditionally eclectic, based chiefly upon Gothic or classical forms; in view of this, Sullivan's Guaranty Building was far ahead of its time.

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SUBJECT AREA: Weapons and armour

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Wilkinson's father Isaac was a farmer turned ironmaster. Soon after 1750, the family acquired Bersham furnace, near Wrexham. This was later in the hands of John and his brother William. By 1763, John had risen to take sole charge of Broseley furnace near Coalbrookdale, Shropshire, and in 1770 he set up a third furnace at Bradley, Staffordshire. By this time he had become one of the country's leading ironmasters, known for the wide range of ware made of cast iron, doubtless the reason for his nickname "Ironmad Wilkinson". He made a cast-iron boat which, to the surprise of many, floated. For his own eventual use, he also made a cast-iron coffin, but did not make sufficient allowance for increasing girth with age! Wilkinson's most notable invention was his cannon-boring machine, patented in 1774. The gun barrel was held rigidly while the cutter head moved forward on a rod inside a hollow boring bar. The machine was easily adapted to bore the cylinders for Boulton \& Watt's steam engines and he became a regular supplier, as only he could bore them with the required accuracy. On the other hand, their second engine was supplied to Wilkinson to power a blowing engine to provide air blast for his Broseley furnace: this was the first use of a Boulton \& Watt engine for a purpose other than pumping. By 1780 he had three further steam engines at work. Wilkinson installed the first Boulton \& Watt engine in France at the Paris waterworks, for which he supplied the iron pipes. Another patent was obtained in 1794 for the invention of the cupola or furnace for melting metal for small castings, although it is now thought that the real inventor was his brother William. Apart from domestic and engineering ironware, Wilkinson was supplier of arms to the American and, illicitly, to the French.

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SUBJECT AREA: Weapons and armour

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Belidor was the son of a French army officer, who died when he was six months old, and was thereafter brought up by a brother officer. He soon demonstrated a scientific bent, and gravitated to Paris, where he became involved in the determination of the Paris meridian. He was then appointed Professor at the artillery school at La Fère, where he began to pursue the science of ballistics in earnest. He was able to disprove the popular theory that range was directly proportional to the powder charge, and also argued that the explosive power of a charge was greatest at the end of the explosion; he advocated spherical chambers in order to take advantage of this. His ideas made him unpopular with the "establishment", especially the Master of the King's artillery, and he was forced to leave France for a time, becoming a consultant to authorities in Bohemia and Bavaria. However, he was reinstated, and in 1758 he was appointed Royal Inspector of Artillery, a post that he held until his death.

Belidor also made a name for himself in hydraulics and influenced design in this field for more than a century after his death. In addition, he was the first to make practical application of integral calculus.

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SUBJECT AREA: Telecommunications

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Bell's grandfather was a professor of elocution in London and his father an authority on the physiology of the voice and on elocution; Bell was to follow in their footsteps. He was educated in Edinburgh, leaving school at 13. In 1863 he went to Elgin, Morayshire, as a pupil teacher in elocution, with a year's break to study at Edinburgh University; it was in 1865, while still in Elgin, that he first conceived the idea of the electrical transmission of speech. He went as a master to Somersetshire College, Bath (now in Avon), and in 1867 he moved to London to assist his father, who had taken up the grandfather's work in elocution. In the same year, he matriculated at London University, studying anatomy and physiology, and also began teaching the deaf. He continued to pursue the studies that were to lead to the invention of the telephone. At this time he read Helmholtz's The Sensations of Tone, an important work on the theory of sound that was to exert a considerable influence on him.

In 1870 he accompanied his parents when they emigrated to Canada. His work for the deaf gained fame in both Canada and the USA, and in 1873 he was apponted professor of vocal physiology and the mechanics of speech at Boston University, Massachusetts. There, he continued to work on his theory that sound wave vibrations could be converted into a fluctuating electric current, be sent along a wire and then be converted back into sound waves by means of a receiver. He approached the problem from the background of the theory of sound and voice production rather than from that of electrical science, and by 1875 he had succeeded in constructing a rough model. On 7 March 1876 Bell spoke the famous command to his assistant, "Mr Watson, come here, I want you": this was the first time a human voice had been transmitted along a wire. Only three days earlier, Bell's first patent for the telephone had been granted. Almost simultaneously, but quite independently, Elisha Gray had achieved a similar result. After a period of litigation, the US Supreme Court awarded Bell priority, although Gray's device was technically superior.

In 1877, three years after becoming a naturalized US citizen, Bell married the deaf daughter of his first backer. In August of that year, they travelled to Europe to combine a honeymoon with promotion of the telephone. Bell's patent was possibly the most valuable ever issued, for it gave birth to what later became the world's largest private service organization, the Bell Telephone Company.

Bell had other scientific and technological interests: he made improvements in telegraphy and in Edison's gramophone, and he also developed a keen interest in aeronautics, working on Curtiss's flying machine. Bell founded the celebrated periodical Science.

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SUBJECT AREA: Ports and shipping

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He was the son of Jeremiah Bentham, a lawyer. His mother died when he was an infant and his early education was at Westminster. At the age of 14 he was apprenticed to a master shipwright at Woolwich and later at Chatham Dockyard, where he made some small improvements in the fittings of ships. In 1778 he completed his apprenticeship and sailed on the Bienfaisant on a summer cruise of the Channel Fleet where he suggested and supervised several improvements to the steering gear and gun fittings.

Unable to find suitable employment at home, he sailed for Russia to study naval architecture and shipbuilding, arriving at St Petersburg in 1780, whence he travelled throughout Russia as far as the frontier of China, examining mines and methods of working metals. He settled in Kritchev in 1782 and there established a small shipyard with a motley work-force. In 1784 he was appointed to command a battalion. He set up a yard on the "Panopticon" principle, with all workshops radiating from his own central office. He increased the armament of his ships greatly by strengthening the hulls and fitting guns without recoil, which resulted in a great victory over the Turks at Liman in 1788. For this he was awarded the Cross of St George and promoted to Brigadier- General. Soon after, he was appointed to a command in Siberia, where he was responsible for opening up the resources of the country greatly by developing river navigation.

In 1791 he returned to England, where he was at first involved in the development of the Panopticon for his brother as well as with several other patents. In 1795 he was asked to look into the mechanization of the naval dockyards, and for the next eighteen years he was involved in improving methods of naval construction and machinery. He was responsible for the invention of the steam dredger, the caisson method of enclosing the entrances to docks, and the development of non-recoil cannonades of large calibre.

His intervention in the maladministration of the naval dockyards resulted in an enquiry that brought about the clearing-away of much corruption, making him very unpopular. As a result he was sent to St Petersburg to arrange for the building of a number of ships for the British navy, in which the Russians had no intention of co-operating. On his return to England after two years he was told that his office of Inspector-General of Navy Works had been abolished and he was appointed to the Navy Board; he had several disagreements with John Rennie and in 1812 was told that this office, too, had been abolished. He went to live in France, where he stayed for thirteen years, returning in 1827 to arrange for the publication of some of his papers.

There is some doubt about his use of his title: there is no record of his having received a knighthood in England, but it was assumed that he was authorized to use the title, granted to him in Russia, after his presentation to the Tsar in 1809.

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SUBJECT AREA: Electronics and information technology, Recording

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At the age of 23, Eisler obtained a Diploma in Engineering from the Technical University of Vienna. Because of the growing Nazi influence in Austria, he then accepted a post with the His Master's Voice (HMV) agents in Belgrade, where he worked on the problems of radio reception and sound transmission in railway trains. However, he soon returned to Vienna to found a weekly radio journal and file patents on graphical sound recording (for which he received a doctorate) and on a system of stereoscopic television based on lenticular vertical scanning.

In 1936 he moved to England and sold the TV patent to Marconi for £250. Unable to find a job, he carried out experiments in his rooms in a Hampstead boarding-house; after making circuits using strip wires mounted on bakelite sheet, he filed his first printed-circuit patent that year. He then tried to find ways of printing the circuits, but without success. Obtaining a post with Odeon Theatres, he invented a sound-level control for films and devised a mirror-drum continuous-film projector, but with the outbreak of war in 1939, when the company was evacuated, he chose to stay in London and was interned for a while. Released in 1941, he began work with Henderson and Spalding, a firm of lithographic printers, to whom he unwittingly assigned all future patents for the paltry sum of £1. In due course he perfected a means of printing conducting circuits and on 3 February 1943 he filed three patents covering the process. The British Ministry of Defence rejected the idea, considering it of no use for military equipment, but after he had demonstrated the technique to American visitors it was enthusiastically taken up in the US for making proximity fuses, of which many millions were produced and used for the war effort. Subsequently the US Government ruled that all air-borne electronic circuits should be printed.

In the late 1940s the Instrument Department of Henderson and Spalding was split off as Technograph Printed Circuits Ltd, with Eisler as Technical Director. In 1949 he filed a further patent covering a multilayer system; this was licensed to Pye and the Telegraph Condenser Company. A further refinement, patented in the 1950s, the use of the technique for telephone exchange equipment, but this was subsequently widely infringed and although he negotiated licences in the USA he found it difficult to license his ideas in Europe. In the UK he obtained finance from the National Research and Development Corporation, but they interfered and refused money for further development, and he eventually resigned from Technograph. Faced with litigation in the USA and open infringement in the UK, he found it difficult to establish his claims, but their validity was finally agreed by the Court of Appeal (1969) and the House of Lords (1971).

As a freelance inventor he filed many other printed-circuit patents, including foil heating films and batteries. When his Patent Agents proved unwilling to fund the cost of filing and prosecuting Complete Specifications he set up his own company, Eisler Consultants Ltd, to promote food and space heating, including the use of heated cans and wallpaper! As Foil Heating Ltd he went into the production of heating films, the process subsequently being licensed to Thermal Technology Inc. in California.

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SUBJECT AREA: Photography, film and optics

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The only son of Sir William Herschel, the famous astronomer, John graduated from Cambridge in 1813 and went on to become a distinguished astronomer, mathematician and chemist. He left England in November 1833 to set up an observatory near Cape Town, South Africa, where he embarked on a study of the heavens in the southern hemisphere. He returned to England in the spring of 1838, and between 1850 and 1855 Herschel served as Master of the Royal Mint. He made several notable contributions to photography, perhaps the most important being his discovery in 1819 that hyposulphites (thiosulphates) would dissolve silver salts. He brought this property to the attention of W.H.F. Talbot, who in 1839 was using a common salt solution as a fixing agent for his early photographs. After trials, Talbot adopted "hypo", which was a far more effective fixative. It was soon adopted by other photographers and eventually became the standard photographic fixative, as it still is in the 1990s. After hearing of the first photographic process in January 1839, Herschel devised his own process within a week. In September 1839 he made the first photograph on glass. He is credited with introducing the words "positive", "negative" and "snapshot" to photography, and in 1842 he invented the cyanotype or "blueprint" process. This process was later to be widely adopted by engineers and architects for the reproduction of plans and technical drawings, a practice abandoned only in the late twentieth century.

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SUBJECT AREA: Recording

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He graduated from the Dover Academy (Delaware) in 1882 and was apprenticed in a machine-repair firm in Philadelphia and studied in evening classes at the Spring Garden Institute. In 1888 he took employment in a small Philadelphia machine shop owned by Andrew Scull, specializing in repair and bookbinding machinery. After travels in the western part of the US, in 1891 he became a partner in Scull \& Johnson, Manufacturing Machinists, and established a further company, the New Jersey Wire Stitching Machine Company. He bought out Andrew Scull's interest in October 1894 (the last instalment being paid in 1897) and became an independent general machinist. In 1896 he had perfected a spring motor for the Berliner flat-disc gramophone, and he started experimenting with a more direct method of recording in a spiral groove: that of cutting in wax. Co-operation with Berliner eventually led to the incorporation of the Victor Talking Machine Company in 1901. The innumerable court cases stemming from the fact that so many patents for various elements in sound recording and reproduction were in very many hands were brought to an end in 1903 when Johnson was material in establishing cross-licencing agreements between Victor, Columbia Graphophone and Edison to create what is known as a patent pool. Early on, Johnson had a thorough experience in all matters concerning the development and manufacture of both gramophones and records. He made and patented many major contributions in all these fields, and his approach was very business-like in that the contribution to cost of each part or process was always a decisive factor in his designs. This attitude was material in his consulting work for the sister company, the Gramophone Company, in London before it set up its own factories in 1910. He had quickly learned the advantages of advertising and of providing customers with durable equipment and records. This motivation was so strong that Johnson set up a research programme for determining the cause of wear in records. It turned out to depend on groove profile, and from 1911 one particular profile was adhered to and processes for transforming the grooves of valuable earlier records were developed. Without precise measuring instruments, he used the durability as the determining factor. Johnson withdrew more and more to the role of manager, and the Victor Talking Machine Company gained such a position in the market that the US anti-trust legislation was used against it. However, a generation change in the Board of Directors and certain erroneous decisions as to product line started a decline, and in February 1926 Johnson withdrew on extended sick leave: these changes led to the eventual sale of Victor. However, Victor survived due to the advent of radio and the electrification of replay equipment and became a part of Radio Corporation of America. In retirement Johnson took up various activities in the arts and sciences and financially supported several projects; his private yacht was used in 1933 in work with the Smithsonian Institution on a deep-sea hydrographie and fauna-collecting expedition near Puerto Rico.

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SUBJECT AREA: Paper and printing

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Mergenthaler came from a family of teachers, but following a mechanical bent he was apprenticed to a clockmaker. Having served his time, Mergenthaler emigrated to the USA in 1872 to avoid military service. He immediately secured work in Washington, DC, in the scientific instrument shop of August Hahl, the son of his former master. He steadily acquired a reputation for skill and ingenuity, and in 1876, when Hahl transferred his business to Baltimore, Mergenthaler went too. Soon after, they were commissioned to remedy the defects in a model of a writing machine devised by James O.Clephane of Washington. It produced print by typewriting, which was then multiplied by lithography. Mergenthaler soon corrected the defects and Clephane ordered a full-size version. This was completed in 1877 but did not work satisfactorily. Nevertheless, Mergenthaler was moved to engage in the long battle to mechanize the typesetting stage of the printing process. Clephane suggested substituting stereotyping for lithography in his device, but in spite of their keen efforts Mergenthaler and Hahl were again unsuccessful and they abandoned the project. In spare moments Mergenthaler continued his search for a typesetting machine. Late in 1883 it occurred to him to stamp matrices into type bars and to cast type metal into them in the same machine. From this idea, the Linotype machine developed and was completed by July 1884. It worked well and a patent was granted on 26 August that year, and Clephane and his associates set up the National Typographic Company of West Virginia to manufacture it. The New York Tribune ordered twelve Linotypes, and on 3 July 1886 the first of these set part of that day's issue. During the previous year the company had passed into the hands of a group of newspaper owners; increasing differences with the Board led to Mergenthaler's resignation in 1888, but he nevertheless continued to improve the machine, patenting over fifty modifications. The Linotype, together with the Monotype of Tolbert Lanston, rapidly supplanted earlier typesetting methods, and by the 1920s it reigned supreme, the former being used more for newspapers, the latter for book work.

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SUBJECT AREA: Civil engineering, Land transport

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The son of poor working parents, at the age of 6 an attack of smallpox left him blind; however, this did not restrict his future activities, which included swimming and riding. He learned the violin and was much employed as the fiddle-player at country parties. He saved enough money to buy a horse on which he hunted. He took part in bowls, wrestling and boxing, being a robust six foot two inches tall. He rode to Whitby and went thence by boat to London and made other trips to York, Reading and Windsor. In 1740 Colonel Liddell offered him a seat in his coach from London to Harrogate, but he declined and got there more quickly on foot. He set up a one-horse chaise and a four-wheeler for hire in Harrogate, but the local innkeepers set up in competition in the public hire business. He went into the fish business, buying at the coast and selling in Leeds and other towns, but made little profit so he took up his violin again. During the rebellion of 1745 he recruited for Colonel Thornton and served to fight at Hexham, Newcastle and Falkirk, returning home after the Battle of Culloden. He then started travelling between Yorkshire, where be bought cotton and worsted stockings, and Aberdeen, where he sold horses. He set up a twice-weekly service of stage wagons between Knaresborough and York.

In 1765 an Act was passed for a turnpike road between Harrogate and Boroughbridge and he offered to build the Master Surveyor, a Mr Ostler, three miles (5 km) of road between Minskip and Fearnly, selling his wagons and his interest in the carrying business. The road was built satisfactorily and on time. He then quoted for a bridge at Boroughbridge and for a turnpike road between Knaresborough and Harrogate. He built many other roads, always doing the survey of the route on his own. The roads crossed bogs on a base of ling and furze. Many of his roads outside Yorkshire were in Lancashire, Cheshire and Derbyshire. In all he built some 180 miles (290 km) of road, for which he was paid some £65,000.

He worked for thirty years on road building, retiring in old age to a cotton business in Stockport where he had six spinning jennies and a carding engine; however, he found there was little profit in this so he gave the machinery to his son-in-law. The last road he built was from Haslington to Accrington, but due to the rise in labour costs brought about by the demand from the canal boom, he only made £40 profit on a £3,000 contract; the road was completed in 1792, when he retired to his farm at Spofforth at the age of 75. There he died, leaving a wife, four children, twenty grandchildren and ninety greatgrandchildren. His wife was the daughter of the landlord of the Granby Inn, Knaresborough.

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SUBJECT AREA: Paper and printing

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Parker was born of English immigrant stock and grew up on his parents' farm in Iowa. He matriculated at Upper Iowa University and then joined the Valentine School of Telegraphy at Jamesville, Wisconsin: within a year he was on the staff. He supplemented his meagre school-master's pay by selling fountain pens to his students. He found that the pens needed constant attention, and his students were continually bringing them back to him for repair. The more he sold, the more he repaired. The work furnished him, first, with a detailed knowledge of the design and construction of the fountain pen and then with the thought that he could make a better pen himself. He gave up his teaching career and in 1888 began experimenting. He established his own company and in the following year he registered his first patent. The Parker Pen Company was formally incorporated on 8 March 1892.

In the following years he patented many improvements, including the Lucky Curve pen and ink-feed system, patented in 1894. That was the real breakthrough for Parker and the pen was an immediate success. It solved the problem that had bedevilled the fountain pen before and since, by incorporating an ink-feed system that ensured a free and uniform flow of ink to where it was wanted, the nib, and not to other undesirable places.

Parker established a reputation for manufacturing high-quality pens that looked good and worked well and reliably. The pens were in demand worldwide and the company grew.

During the First World War, Parker introduced the Trench Pen for use on the Western Front. A tablet of pigment was inserted in a blind cap at the end of the pen. When this tablet was placed in the barrel and the barrel was filled with water, the pen was ready for use.

Later developments included the Duofold pen, designed and launched in 1920. It had an enlarged ink capacity, a red barrel and a twentyfive-year guarantee on the nib. It became immensely popular with the public and was the flagship product throughout the 1920s and early 1930s, until the Vacumatic was launched in 1933.

Parker handed over control of the company to this two sons, Kenneth and Russell, during the 1920s, remaining President until his retirement in 1933.

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SUBJECT AREA: Land transport, Railways and locomotives, Steam and internal combustion engines

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Trevithick's father was a tin-mine manager, and Trevithick himself, after limited formal education, developed his immense engineering talent among local mining machinery and steam-engines and found employment as a mining engineer. Tall, strong and high-spirited, he was the eternal optimist.

About 1797 it occurred to him that the separate condenser patent of James Watt could be avoided by employing "strong steam", that is steam at pressures substantially greater than atmospheric, to drive steam-engines: after use, steam could be exhausted to the atmosphere and the condenser eliminated. His first winding engine on this principle came into use in 1799, and subsequently such engines were widely used. To produce high-pressure steam, a stronger boiler was needed than the boilers then in use, in which the pressure vessel was mounted upon masonry above the fire: Trevithick designed the cylindrical boiler, with furnace tube within, from which the Cornish and later the Lancashire boilers evolved.

Simultaneously he realized that high-pressure steam enabled a compact steam-engine/boiler unit to be built: typically, the Trevithick engine comprised a cylindrical boiler with return firetube, and a cylinder recessed into the boiler. No beam intervened between connecting rod and crank. A master patent was taken out.

Such an engine was well suited to driving vehicles. Trevithick built his first steam-carriage in 1801, but after a few days' use it overturned on a rough Cornish road and was damaged beyond repair by fire. Nevertheless, it had been the first self-propelled vehicle successfully to carry passengers. His second steam-carriage was driven about the streets of London in 1803, even more successfully; however, it aroused no commercial interest. Meanwhile the Coalbrookdale Company had started to build a locomotive incorporating a Trevithick engine for its tramroads, though little is known of the outcome; however, Samuel Homfray's ironworks at Penydarren, South Wales, was already building engines to Trevithick's design, and in 1804 Trevithick built one there as a locomotive for the Penydarren Tramroad. In this, and in the London steam-carriage, exhaust steam was turned up the chimney to draw the fire. On 21 February the locomotive hauled five wagons with 10 tons of iron and seventy men for 9 miles (14 km): it was the first successful railway locomotive.

Again, there was no commercial interest, although Trevithick now had nearly fifty stationary engines completed or being built to his design under licence. He experimented with one to power a barge on the Severn and used one to power a dredger on the Thames. He became Engineer to a project to drive a tunnel beneath the Thames at Rotherhithe and was only narrowly defeated, by quicksands. Trevithick then set up, in 1808, a circular tramroad track in London and upon it demonstrated to the admission-fee-paying public the locomotive Catch me who can, built to his design by John Hazledine and J.U. Rastrick.

In 1809, by which date Trevithick had sold all his interest in the steam-engine patent, he and Robert Dickinson, in partnership, obtained a patent for iron tanks to hold liquid cargo in ships, replacing the wooden casks then used, and started to manufacture them. In 1810, however, he was taken seriously ill with typhus for six months and had to return to Cornwall, and early in 1811 the partners were bankrupt; Trevithick was discharged from bankruptcy only in 1814.

In the meantime he continued as a steam engineer and produced a single-acting steam engine in which the cut-off could be varied to work the engine expansively by way of a three-way cock actuated by a cam. Then, in 1813, Trevithick was approached by a representative of a company set up to drain the rich but flooded silver-mines at Cerro de Pasco, Peru, at an altitude of 14,000 ft (4,300 m). Low-pressure steam engines, dependent largely upon atmospheric pressure, would not work at such an altitude, but Trevithick's high-pressure engines would. Nine engines and much other mining plant were built by Hazledine and Rastrick and despatched to Peru in 1814, and Trevithick himself followed two years later. However, the war of independence was taking place in Peru, then a Spanish colony, and no sooner had Trevithick, after immense difficulties, put everything in order at the mines then rebels arrived and broke up the machinery, for they saw the mines as a source of supply for the Spanish forces. It was only after innumerable further adventures, during which he encountered and was assisted financially by Robert Stephenson, that Trevithick eventually arrived home in Cornwall in 1827, penniless.

He petitioned Parliament for a grant in recognition of his improvements to steam-engines and boilers, without success. He was as inventive as ever though: he proposed a hydraulic power transmission system; he was consulted over steam engines for land drainage in Holland; and he suggested a 1,000 ft (305 m) high tower of gilded cast iron to commemorate the Reform Act of 1832. While working on steam propulsion of ships in 1833, he caught pneumonia, from which he died.

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See also: Blenkinsop, John

SUBJECT AREA: Architecture and building, Civil engineering

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Villard was one of the thirteenth-century architect-engineers who were responsible for the design and construction of the great Gothic cathedrals and other churches of the time. Their responsibilities covered all aspects of the work, including (in the spirit of the Roman architect Vitruvius) the invention and construction of mechanical devices. In their time, these men were highly esteemed and richly rewarded, although few of the inscriptions paying tribute to their achievements have survived. Villard stands out among them because a substantial part of his sketchbook has survived, in the form of thirty-three parchment sheets of drawings and notes, now kept in the Bibliothèque Nationale in Paris. Villard's professional career lasted roughly from 1225 to 1250. As a boy, he went to work on the building of the Cistercian monastery at Vaucelles, not far from Honnecourt, and afterwards he was apprenticed to the masons' lodge at Cambrai Cathedral, where he began copying the drawings and layouts on the tracing-house floor. All his drawings are, therefore, of the plans, elevations and sections of cathedrals. These buildings have long since been destroyed, but his drawings, perhaps among his earliest, bear witness to their architecture. He travelled widely in France and recorded features of the great works at Reims, Laon and Chartres. These include the complex system of passageways built into the fabric of a great cathedral; Villard comments that one of their purposes was "to allow circulation in case of fire".

Villard was invited to Hungary and reached there c. 1235. He may have been responsible for the edifice dedicated to St Elizabeth of Hungary, canonized in 1235, at Kassa (now Košice, Slovakia). Villard probably returned to France c. 1240, at least before the Tartar invasion of Hungary in 1241.

His sketchbook, which dates to c. 1235, stands as a memorial to Villard's skill as a draughtsman, a student of perspective and a mechanical engineer. He took his sketchbook with him on his travels, and used ideas from it in his work abroad. It contains architectural designs, geometrical constructions for use in building, surveying exercises and drawings for various kinds of mechanical devices, for civil or military use. He was transmitting details from the highly developed French Gothic masons to the relatively underdeveloped eastern countries. The notebooks were annotated for the use of pupils and other master masons, and the notes on geometry were obviously intended for pupils. The prize examples are the pages in the book, clearly Villard's own work, related to mechanical devices. Whilst he, like many others of the period and after, played with designs for perpetual-motion machines, he concentrated on useful devices. These included the first Western representation of a perpetualmotion machine, which at least displays a concern to derive a source of energy: this was a water-powered sawmill, with automatic feed of the timber into the mill. This has been described as the first industrial automatic power-machine to involve two motions, for it not only converts the rotary motion of the water-wheel to the reciprocating motion of the saw, but incorporates a means of keeping the log pressed against the saw. His other designs included water-wheels, watermills, the Archimedean screw and other curious devices.

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SUBJECT AREA: Ports and shipping

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Since he had a long family connection with the naval base at Portsmouth, it is not surprising that Watts started to serve his apprenticeship there in 1860. He was singled out for advanced training and then in 1866 was one of three young men selected to attend the Royal School of Naval Architecture at South Kensington in London. On completing his training he joined the technical staff, then had a period as a ship overseer before going to assist William Froude for two years, an arrangement which led to a close friendship between Watts and the two Froudes. Some interesting tasks followed: the calculations for HM Armoured Ram Polyphemus; the setting up of a "calculating" section within the Admiralty; and then work as a constructor at Chatham Dockyard. In 1885 the first major change of direction took place: Watts resigned from naval service to take the post of General Manager of the Elswick shipyard of Sir W.G.Armstrong. This was a wonderful opportunity for an enthusiastic and highly qualified man, and Watts rose to the challenge. Elswick produced some of the finest warships at the end of the nineteenth century and its cruisers, such as the Esmeralda of the Chilean Navy, had a legendary name.

In 1902 he was recalled to the Navy to succeed Sir William White as Director of Naval Construction (DNC). This was one of the most exciting times ever in warship design and it was during Watts's tenure of the post that the Dreadnought class of battleship was produced, the submarine service was developed and the destroyer fleet reached high levels of performance. It has been said that Watts's distinct achievements as DNC were greater armament per ton displacement, higher speeds and better manoeuvring, greater protection and, almost as important, elegance of appearance. Watt retired in 1912 but remained a consultant to the Admiralty until 1916, and then joined the board of Armstrong Whitworth, on which he served until his death.

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SUBJECT AREA: Domestic appliances and interiors

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Wedgwood came from prolific farming stock who, in the seventeenth century, had turned to pot-making. At the age of 9 his education was brought to an end by his father's death and he was set to work in one of the family potteries. Two years later an attack of smallpox left him with a weakness in his right knee which prevented him from working the potter's wheel. This forced his attention to other aspects of the process, such as design and modelling. He was apprenticed to his brother Thomas in 1744, and in 1752 was in partnership with Thomas Whieldon, a leading Staffordshire potter, until probably the first half of 1759, when he became a master potter and set up in business on his own account at Ivy House Works in Burslem.

Wedgwood was then able to exercise to the full his determination to improve the quality of his ware. This he achieved by careful attention to all aspects of the work: artistic judgement of form and decoration; chemical study of the materials; and intelligent management of manufacturing processes. For example, to achieve greater control over firing conditions, he invented a pyrometer, a temperature-measuring device by which the shrinkage of prepared clay cylinders in the furnace gave an indication of the temperature. Wedgwood was the first potter to employ steam power, installing a Boulton \& Watt engine for crushing and other operations in 1782. Beyond the confines of his works, Wedgwood concerned himself in local issues such as improvements to the road and canal systems to facilitate transport of raw materials and products.

During the first ten years, Wedgwood steadily improved the quality of his cream ware, known as "Queen's ware" after a set of ware was presented to Queen Charlotte in 1762. The business prospered and his reputation grew. In 1766 he was able to purchase an estate on which he built new works, a mansion and a village to which he gave the name Etruria. Four years after the Etruria works were opened in 1769, Wedgwood began experimenting with a barium compound combined in a fine-textured base allied to a true porcelain. The result was Wedgwood's most original and distinctive ware similar to jasper, made in a wide variety of forms.

Wedgwood had many followers and imitators but the merit of initiating and carrying through a large-scale technical and artistic development of English pottery belongs to Wedgwood.

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SUBJECT AREA: Ports and shipping

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At the conclusion of his apprenticeship at the Royal Dockyard, Portsmouth, Biles entered the Royal School of Naval Architecture, South Kensington, London; as it was absorbed by the Royal Naval College, he graduated from Greenwich to the Naval Construction Branch, first at Pembroke and later at the Admiralty. From the outset of his professional career it was apparent that he had the intellectual qualities that would enable him to oversee the greatest changes in ship design of all time. He was one of the earliest proponents of the revolutionary work of the hydrodynamicist William Froude.

In 1880 Biles turned to the merchant sector, taking the post of Naval Architect to J. \& G. Thomson (later John Brown \& Co.). Using Froude's Law of Comparisons he was able to design the record-breaking City of Paris of 1887, the ship that started the fabled succession of fast and safe Clyde bank-built North Atlantic liners. For a short spell, before returning to Scotland, Biles worked in Southampton. In 1891 Biles accepted the Chair of Naval Architecture at the University of Glasgow. Working from the campus at Gilmorehill, he was to make the University (the oldest school of engineering in the English-speaking world) renowned in naval architecture. His workload was legendary, but despite this he was admired as an excellent lecturer with cheerful ways which inspired devotion to the Department and the University. During the thirty years of his incumbency of the Chair, he served on most of the important government and international shipping committees, including those that recommended the design of HMS Dreadnought, the ordering of the Cunarders Lusitania and Mauretania and the lifesaving improvements following the Titanic disaster. An enquiry into the strength of destroyer hulls followed the loss of HMS Cobra and Viper, and he published the report on advanced experimental work carried out on HMS Wolf by his undergraduates.

In 1906 he became Consultant Naval Architect to the India Office, having already set up his own consultancy organization, which exists today as Sir J.H.Biles and Partners. His writing was prolific, with over twenty-five papers to professional institutions, sundry articles and a two-volume textbook.

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SUBJECT AREA: Mechanical, pneumatic and hydraulic engineering

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William Buckle was the son of Thomas Buckle (1759–1849), a millwright who later assisted the 9th Earl of Dundonald (1749–1831) in his various inventions, principally machines for the manufacture of rope. Soon after the birth of William, the family moved from Alnwick to Hull, Yorkshire, where he received his education. The family again moved c.1808 to London, and William was apprenticed to Messrs Woolf \& Edwards, millwrights and engineers of Lambeth. During his apprenticeship he attended evening classes at a mechanical drawing school in Finsbury, which was then the only place of its kind in London.

After completing his apprenticeship, he was sent by Messrs Humphrys to Memel in Prussia to establish steamboats on the rivers and lakes there under the patronage of the Prince of Hardenburg. After about four years he returned to Britain and was employed by Boulton, Watt \& Co. to install the engines in the first steam mail packet for the service between Dublin and Holyhead. He was responsible for the engines of the steamship Lightning when it was used on the visit of George IV to Ireland.

About 1824 Buckle was engaged by Boulton, Watt \& Co. as Manager of the Soho Foundry, where he is credited with introducing the first large screw-cutting lathe. At Soho about 700 or 800 men were employed on a wide variety of engineering manufacture, including coining machinery for mints in many parts of the world, with some in 1826 for the Mint at the Soho Manufactory. In 1851, following the recommendations of a Royal Commission, the Royal Mint in London was reorganized and Buckle was asked to take the post of Assistant Coiner, the senior executive officer under the Deputy Master. This he accepted, retaining the post until the end of his life.

At Soho, Buckle helped to establish a literary and scientific institution to provide evening classes for the apprentices and took part in the teaching. He was an original member of the Institution of Mechanical Engineers, which was founded in Birmingham in January 1847, and a member of their Council from then until 1855. He contributed a number of papers in the early years, including a memoir of William Murdock whom he had known at Soho; he resigned from the Institution in 1856 after his move to London. He was an honorary member of the London Association of Foreman Engineers.

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SUBJECT AREA: Electronics and information technology, Telecommunications

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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.

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See also: Hartley, Ralph V.L.