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pneumatic construction tools

  • 1 pneumatic construction tools

    Англо-русский строительный словарь > pneumatic construction tools

  • 2 пневматические строительные инструменты

    Русско-английский словарь по строительству и новым строительным технологиям > пневматические строительные инструменты

  • 3 tool

    1) инструмент; резец; орудие
    •
    - air tool - assembly tools - batting tool - bending tool - berm maintenance tool - boring tool - carpenter's tool - claw tool - combine tools - construction tools - constructional tools - coring tool - cutting tool - diagnostic tools - diamond tools - drilling tool - earth-moving tool - electric hand tools - erecting tools - fishing tool - fitter's tool - forging tools - grafting tool - hand tool - hand building tools - hard-alloy tool - hot-line tool - jointer's tool - jointing tool - lewising tool - maintenance tools - marking tools - pneumatic tool - pneumatic construction tools - power tool - power-operated tools - scratch tool - stirring tool - trial boring tool - trowelling tools - wearing tools - woodwork tools
    * * *
    инструмент ( обычно ручной); средство; оснастка; орудие; приспособление
    - abrasive tool
    - air tool
    - arrising tool
    - beading tool
    - blade tools
    - caulking tool
    - connecting tools
    - crimping tool
    - diamond tool
    - electrically driven tools
    - electric hand-held tools
    - electric hand tools
    - electric power tools
    - electro-hydraulic hand-held tool
    - erecting tools
    - excavating tools
    - fastening tool
    - finishing tools
    - finishing power tools
    - fishing tools
    - flaring tool
    - grooving tool
    - hand tools
    - hand tool
    - hand-held hydraulic tools
    - hand-held power tools
    - labor saving tools
    - machine tool
    - Mackintosh boring and prospecting tool
    - mechanical hand tools
    - painter's hand tools
    - pitching tool
    - pneumatic hand tools
    - pneumatic tools
    - portable electric power tools
    - power-actuated fastening tool
    - power-driven hand tools
    - power hand tools
    - rotary-percussion powered tools
    - rotary-percussion power tools
    - rotary powered tools
    - rotary power tools
    - sampling tool
    - small tools
    - small tools and equipment
    - stamping tool
    - straightedging tool
    - swaging tool
    - track tool
    - vibrating tool

    Англо-русский строительный словарь > tool

  • 4 пневматические ручные машины

    1) Construction: hand tools, pneumatic tools

    Универсальный русско-английский словарь > пневматические ручные машины

  • 5 пневматический инструмент

    1) General subject: pneumatic (air) tool
    3) Construction: compressor air tool
    4) Oil: pneumatic tool

    Универсальный русско-английский словарь > пневматический инструмент

  • 6 Sellers, William

    [br]
    b. 19 September 1824 Upper Darby, Pennsylvania, USA
    d. 24 January 1905 Philadelphia, Pennsylvania, USA
    [br]
    American mechanical engineer and inventor.
    [br]
    William Sellers was educated at a private school that had been established by his father and other relatives for their children, and at the age of 14 he was apprenticed for seven years to the machinist's trade with his uncle. At the end of his apprenticeship in 1845 he took charge of the machine shop of Fairbanks, Bancroft \& Co. in Providence, Rhode Island. In 1848 he established his own factory manufacturing machine tools and mill gearing in Philadelphia, where he was soon joined by Edward Bancroft, the firm becoming Bancroft \& Sellers. After Bancroft's death the name was changed in 1856 to William Sellers \& Co. and Sellers served as President until the end of his life. His machine tools were characterized by their robust construction and absence of decorative embellishments. In 1868 he formed the Edgemoor Iron Company, of which he was President. This company supplied the structural ironwork for the Centennial Exhibition buildings and much of the material for the Brooklyn Bridge. In 1873 he reorganized the William Butcher Steel Works, renaming it the Midvale Steel Company, and under his presidency it became a leader in the production of heavy ordnance. It was at the Midvale Steel Company that Frederick W. Taylor began, with the encouragement of Sellers, his experiments on cutting tools.
    In 1860 Sellers obtained the American rights of the patent for the Giffard injector for feeding steam boilers. He later invented his own improvements to the injector, which numbered among his many other patents, most of which related to machine tools. Probably Sellers's most important contribution to the engineering industry was his proposal for a system of screw threads made in 1864 and later adopted as the American national standard.
    Sellers was a founder member in 1880 of the American Society of Mechanical Engineers and was also a member of many other learned societies in America and other countries, including, in Britain, the Institution of Mechanical Engineers and the Iron and Steel Institute.
    [br]
    Principal Honours and Distinctions
    Chevalier de la Légion d'honneur 1889. President, Franklin Institute 1864–7.
    Further Reading
    J.W.Roe, 1916, English and American Tool Builders, New Haven; reprinted 1926, New York, and 1987, Bradley, Ill. (describes Sellers's work on machine tools).
    Bruce Sinclair, 1969, "At the turn of a screw: William Sellers, the Franklin Institute, and a standard American thread", Technology and Culture 10:20–34 (describes his work on screw threads).
    RTS

    Biographical history of technology > Sellers, William

  • 7 Whitworth, Sir Joseph

    [br]
    b. 21 December 1803 Stockport, Cheshire, England
    d. 22 January 1887 Monte Carlo, Monaco
    [br]
    English mechanical engineer and pioneer of precision measurement.
    [br]
    Joseph Whitworth received his early education in a school kept by his father, but from the age of 12 he attended a school near Leeds. At 14 he joined his uncle's mill near Ambergate, Derbyshire, to learn the business of cotton spinning. In the four years he spent there he realized that he was more interested in the machinery than in managing a cotton mill. In 1821 he obtained employment as a mechanic with Crighton \& Co., Manchester. In 1825 he moved to London and worked for Henry Maudslay and later for the Holtzapffels and Joseph Clement. After these years spent gaining experience, he returned to Manchester in 1833 and set up in a small workshop under a sign "Joseph Whitworth, Tool Maker, from London".
    The business expanded steadily and the firm made machine tools of all types and other engineering products including steam engines. From 1834 Whitworth obtained many patents in the fields of machine tools, textile and knitting machinery and road-sweeping machines. By 1851 the company was generally regarded as the leading manufacturer of machine tools in the country. Whitworth was a pioneer of precise measurement and demonstrated the fundamental mode of producing a true plane by making surface plates in sets of three. He advocated the use of the decimal system and made use of limit gauges, and he established a standard screw thread which was adopted as the national standard. In 1853 Whitworth visited America as a member of a Royal Commission and reported on American industry. At the time of the Crimean War in 1854 he was asked to provide machinery for manufacturing rifles and this led him to design an improved rifle of his own. Although tests in 1857 showed this to be much superior to all others, it was not adopted by the War Office. Whitworth's experiments with small arms led on to the construction of big guns and projectiles. To improve the quality of the steel used for these guns, he subjected the molten metal to pressure during its solidification, this fluid-compressed steel being then known as "Whitworth steel".
    In 1868 Whitworth established thirty annual scholarships for engineering students. After his death his executors permanently endowed the Whitworth Scholarships and distributed his estate of nearly half a million pounds to various educational and charitable institutions. Whitworth was elected an Associate of the Institution of Civil Engineers in 1841 and a Member in 1848 and served on its Council for many years. He was elected a Member of the Institution of Mechanical Engineers in 1847, the year of its foundation.
    [br]
    Principal Honours and Distinctions
    Baronet 1869. FRS 1857. President, Institution of Mechanical Engineers 1856, 1857 and 1866. Hon. LLD Trinity College, Dublin, 1863. Hon. DCL Oxford University 1868. Member of the Smeatonian Society of Civil Engineers 1864. Légion d'honneur 1868. Society of Arts Albert Medal 1868.
    Bibliography
    1858, Miscellaneous Papers on Mechanical Subjects, London; 1873, Miscellaneous Papers on Practical Subjects: Guns and Steel, London (both are collections of his papers to technical societies).
    1854, with G.Wallis, The Industry of the United States in Machinery, Manufactures, and
    Useful and Ornamental Arts, London.
    Further Reading
    F.C.Lea, 1946, A Pioneer of Mechanical Engineering: Sir Joseph Whitworth, London (a short biographical account).
    A.E.Musson, 1963, "Joseph Whitworth: toolmaker and manufacturer", Engineering Heritage, Vol. 1, London, 124–9 (a short biography).
    D.J.Jeremy (ed.), 1984–6, Dictionary of Business Biography, Vol. 5, London, 797–802 (a short biography).
    W.Steeds, 1969, A History of Machine Tools 1700–1910, Oxford (describes Whitworth's machine tools).
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    Biographical history of technology > Whitworth, Sir Joseph

  • 8 Maudslay, Henry

    [br]
    b. 22 August 1771 Woolwich, Kent, England
    d. 15 February 1831 Lambeth, London, England
    [br]
    English precision toolmaker and engineer.
    [br]
    Henry Maudslay was the third son of an ex-soldier and storekeeper at Woolwich Arsenal. At the age of 12 he was employed at the Arsenal filling cartridges; two years later he was transferred to the woodworking department, adjacent to the smithy, to which he moved when 15 years old. He was a rapid learner, and three years later Joseph Bramah took him on for the construction of special tools required for the mass-production of his locks. Maudslay was thus employed for the next eight years. He became Bramah's foreman, married his housekeeper, Sarah Tindale, and, unable to better himself, decided to leave and set up on his own. He soon outgrew his first premises in Wells Street and moved to Margaret Street, off Oxford Street, where some examples of his workmanship were displayed in the window. These caught the attention of a visiting Frenchman, de Bacquancourt; he was a friend of Marc Isambard Brunel, who was then in the early stages of designing the block-making machinery later installed at Portsmouth dockyard.
    Brunel wanted first a set of working models, as he did not think that the Lords of the Admiralty would be capable of understanding engineering drawings; Maudslay made these for him within the next two years. Sir Samuel Bentham, Inspector-General of Naval Works, agreed that Brunel's system was superior to the one that he had gone some way in developing; the Admiralty approved, and an order was placed for the complete plant. The manufacture of the machinery occupied Maudslay for the next six years; he was assisted by a draughtsman whom he took on from Portsmouth dockyard, Joshua Field (1786–1863), who became his partner in Maudslay, Son and Field. There were as many as eighty employees at Margaret Street until, in 1810, larger premises became necessary and a new works was built at Lambeth Marsh where, eventually, there were up to two hundred workers. The new factory was flanked by two houses, one of which was occupied by Maudslay, the other by Field. The firm became noted for its production of marine steam-engines, notably Maudslay's table engine which was first introduced in 1807.
    Maudslay was a consummate craftsman who was never happier than when working at his bench or at a machine tool; he was also one of the first engineers to appreciate the virtues of standardization. Evidence of this appreciation is to be found in his work in the development of the Bramah lock and then on the machine tools for the manufacture of ship's blocks to Marc Brunel's designs; possibly his most important contribution was the invention in 1797 of the metal lathe. He made a number of surface plates of the finest quality. The most celebrated of his numerous measuring devices was a micrometer-based machine which he termed his "Lord Chancellor" because, in the machine shop, it represented the "final court of appeal", measuring to one-thousandth of an inch.
    [br]
    Further Reading
    1934–5, "Maudslay, Sons \& Field as general engineers", Transactions of the Newcomen Society 15, London.
    1963, Engineering Heritage, Vol. 1, London: Institution of Mechanical Engineers. L.T.C.Rolt, 1965, Tools for the Job, London: Batsford.
    W.Steeds, 1969, A History of Machine Tools 1700–1910, Oxford: Oxford University Press.
    IMcN

    Biographical history of technology > Maudslay, Henry

  • 9 Clement (Clemmet), Joseph

    [br]
    bapt. 13 June 1779 Great Asby, Westmoreland, England
    d. 28 February 1844 London, England
    [br]
    English machine tool builder and inventor.
    [br]
    Although known as Clement in his professional life, his baptism at Asby and his death were registered under the name of Joseph Clemmet. He worked as a slater until the age of 23, but his interest in mechanics led him to spend much of his spare time in the local blacksmith's shop. By studying books on mechanics borrowed from his cousin, a watchmaker, he taught himself and with the aid of the village blacksmith made his own lathe. By 1805 he was able to give up the slating trade and find employment as a mechanic in a small factory at Kirkby Stephen. From there he moved to Carlisle for two years, and then to Glasgow where, while working as a turner, he took lessons in drawing; he had a natural talent and soon became an expert draughtsman. From about 1809 he was employed by Leys, Mason \& Co. of Aberdeen designing and making power looms. For this work he built a screw-cutting lathe and continued his self-education. At the end of 1813, having saved about £100, he made his way to London, where he soon found employment as a mechanic and draughtsman. Within a few months he was engaged by Joseph Bramah, and after a trial period a formal agreement dated 1 April 1814 was made by which Clement was to be Chief Draughtsman and Superintendent of Bramah's Pimlico works for five years. However, Bramah died in December 1814 and after his sons took over the business it was agreed that Clement should leave before the expiry of the five-year period. He soon found employment as Chief Draughtsman with Henry Maudslay \& Co. By 1817 Clement had saved about £500, which enabled him to establish his own business at Prospect Place, Newington Butts, as a mechanical draughtsman and manufacturer of high-class machinery. For this purpose he built lathes for his own use and invented various improvements in their detailed design. In 1827 he designed and built a facing lathe which incorporated an ingenious system of infinitely variable belt gearing. He had also built his own planing machine by 1820 and another, much larger one in 1825. In 1828 Clement began making fluted taps and dies and standardized the screw threads, thus anticipating on a small scale the national standards later established by Sir Joseph Whitworth. Because of his reputation for first-class workmanship, Clement was in the 1820s engaged by Charles Babbage to carry out the construction of his first Difference Engine.
    [br]
    Principal Honours and Distinctions
    Society of Arts Gold Medal 1818 (for straightline mechanism), 1827 (for facing lathe); Silver Medal 1828 (for lathe-driving device).
    Bibliography
    Further Reading
    S.Smiles, 1863, Industrial Biography, London, reprinted 1967, Newton Abbot (virtually the only source of biographical information on Clement).
    L.T.C.Rolt, 1965, Tools for the Job, London (repub. 1986); W.Steeds, 1969, A History of Machine Tools 1700–1910, Oxford (both contain descriptions of his machine tools).
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    Biographical history of technology > Clement (Clemmet), Joseph

  • 10 Murray, Matthew

    [br]
    b. 1765 near Newcastle upon Tyne, England
    d. 20 February 1826 Holbeck, Leeds, England
    [br]
    English mechanical engineer and steam engine, locomotive and machine-tool pioneer.
    [br]
    Matthew Murray was apprenticed at the age of 14 to a blacksmith who probably also did millwrighting work. He then worked as a journeyman mechanic at Stockton-on-Tees, where he had experience with machinery for a flax mill at Darlington. Trade in the Stockton area became slack in 1788 and Murray sought work in Leeds, where he was employed by John Marshall, who owned a flax mill at Adel, located about 5 miles (8 km) from Leeds. He soon became Marshall's chief mechanic, and when in 1790 a new mill was built in the Holbeck district of Leeds by Marshall and his partner Benyon, Murray was responsible for the installation of the machinery. At about this time he took out two patents relating to improvements in textile machinery.
    In 1795 he left Marshall's employment and, in partnership with David Wood (1761– 1820), established a general engineering and millwrighting business at Mill Green, Holbeck. In the following year the firm moved to a larger site at Water Lane, Holbeck, and additional capital was provided by two new partners, James Fenton (1754–1834) and William Lister (1796–1811). Lister was a sleeping partner and the firm was known as Fenton, Murray \& Wood and was organized so that Fenton kept the accounts, Wood was the administrator and took charge of the workshops, while Murray provided the technical expertise. The factory was extended in 1802 by the construction of a fitting shop of circular form, after which the establishment became known as the "Round Foundry".
    In addition to textile machinery, the firm soon began the manufacture of machine tools and steam-engines. In this field it became a serious rival to Boulton \& Watt, who privately acknowledged Murray's superior craftsmanship, particularly in foundry work, and resorted to some industrial espionage to discover details of his techniques. Murray obtained patents for improvements in steam engines in 1799, 1801 and 1802. These included automatic regulation of draught, a mechanical stoker and his short-D slide valve. The patent of 1801 was successfully opposed by Boulton \& Watt. An important contribution of Murray to the development of the steam engine was the use of a bedplate so that the engine became a compact, self-contained unit instead of separate components built into an en-gine-house.
    Murray was one of the first, if not the very first, to build machine tools for sale. However, this was not the case with the planing machine, which he is said to have invented to produce flat surfaces for his slide valves. Rather than being patented, this machine was kept secret, although it was apparently in use before 1814.
    In 1812 Murray was engaged by John Blenkinsop (1783–1831) to build locomotives for his rack railway from Middleton Colliery to Leeds (about 3 1/2 miles or 5.6 km). Murray was responsible for their design and they were fitted with two double-acting cylinders and cranks at right angles, an important step in the development of the steam locomotive. About six of these locomotives were built for the Middleton and other colliery railways and some were in use for over twenty years. Murray also supplied engines for many early steamboats. In addition, he built some hydraulic machinery and in 1814 patented a hydraulic press for baling cloth.
    Murray's son-in-law, Richard Jackson, later became a partner in the firm, which was then styled Fenton, Murray \& Jackson. The firm went out of business in 1843.
    [br]
    Principal Honours and Distinctions
    Society of Arts Gold Medal 1809 (for machine for hackling flax).
    Further Reading
    L.T.C.Rolt, 1962, Great Engineers, London (contains a good short biography).
    E.Kilburn Scott (ed.), 1928, Matthew Murray, Pioneer Engineer, Leeds (a collection of essays and source material).
    Year 1831, London.
    L.T.C.Rolt, 1965, Tools for the Job, London; repub. 1986 (provides information on Murray's machine-tool work).
    Some of Murray's correspondence with Simon Goodrich of the Admiralty has been published in Transactions of the Newcomen Society 3 (1922–3); 6(1925–6); 18(1937– 8); and 32 (1959–60).
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    Biographical history of technology > Murray, Matthew

  • 11 Roberts, Richard

    [br]
    b. 22 April 1789 Carreghova, Llanymynech, Montgomeryshire, Wales
    d. 11 March 1864 London, England
    [br]
    Welsh mechanical engineer and inventor.
    [br]
    Richard Roberts was the son of a shoemaker and tollkeeper and received only an elementary education at the village school. At the age of 10 his interest in mechanics was stimulated when he was allowed by the Curate, the Revd Griffith Howell, to use his lathe and other tools. As a young man Roberts acquired a considerable local reputation for his mechanical skills, but these were exercised only in his spare time. For many years he worked in the local limestone quarries, until at the age of 20 he obtained employment as a pattern-maker in Staffordshire. In the next few years he worked as a mechanic in Liverpool, Manchester and Salford before moving in 1814 to London, where he obtained employment with Henry Maudslay. In 1816 he set up on his own account in Manchester. He soon established a reputation there for gear-cutting and other general engineering work, especially for the textile industry, and by 1821 he was employing about twelve men. He built machine tools mainly for his own use, including, in 1817, one of the first planing machines.
    One of his first inventions was a gas meter, but his first patent was obtained in 1822 for improvements in looms. His most important contribution to textile technology was his invention of the self-acting spinning mule, patented in 1825. The normal fourteen-year term of this patent was extended in 1839 by a further seven years. Between 1826 and 1828 Roberts paid several visits to Alsace, France, arranging cottonspinning machinery for a new factory at Mulhouse. By 1826 he had become a partner in the firm of Sharp Brothers, the company then becoming Sharp, Roberts \& Co. The firm continued to build textile machinery, and in the 1830s it built locomotive engines for the newly created railways and made one experimental steam-carriage for use on roads. The partnership was dissolved in 1843, the Sharps establishing a new works to continue locomotive building while Roberts retained the existing factory, known as the Globe Works, where he soon after took as partners R.G.Dobinson and Benjamin Fothergill (1802–79). This partnership was dissolved c. 1851, and Roberts continued in business on his own for a few years before moving to London as a consulting engineer.
    During the 1840s and 1850s Roberts produced many new inventions in a variety of fields, including machine tools, clocks and watches, textile machinery, pumps and ships. One of these was a machine controlled by a punched-card system similar to the Jacquard loom for punching rivet holes in plates. This was used in the construction of the Conway and Menai Straits tubular bridges. Roberts was granted twenty-six patents, many of which, before the Patent Law Amendment Act of 1852, covered more than one invention; there were still other inventions he did not patent. He made his contribution to the discussion which led up to the 1852 Act by publishing, in 1830 and 1833, pamphlets suggesting reform of the Patent Law.
    In the early 1820s Roberts helped to establish the Manchester Mechanics' Institute, and in 1823 he was elected a member of the Literary and Philosophical Society of Manchester. He frequently contributed to their proceedings and in 1861 he was made an Honorary Member. He was elected a Member of the Institution of Civil Engineers in 1838. From 1838 to 1843 he served as a councillor of the then-new Municipal Borough of Manchester. In his final years, without the assistance of business partners, Roberts suffered financial difficulties, and at the time of his death a fund for his aid was being raised.
    [br]
    Principal Honours and Distinctions
    Member, Institution of Civil Engineers 1838.
    Further Reading
    There is no full-length biography of Richard Roberts but the best account is H.W.Dickinson, 1945–7, "Richard Roberts, his life and inventions", Transactions of the Newcomen Society 25:123–37.
    W.H.Chaloner, 1968–9, "New light on Richard Roberts, textile engineer (1789–1864)", Transactions of the Newcomen Society 41:27–44.
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    Biographical history of technology > Roberts, Richard

  • 12 Bullard, Edward Payson

    [br]
    b. 18 April 1841 Uxbridge, Massachusetts, USA
    d. 22 December 1906 Bridgeport, Connecticut, USA
    [br]
    American mechanical engineer and machine-tool manufacturer who designed machines for boring.
    [br]
    Edward Payson Bullard served his apprenticeship at the Whitin Machine Works, Whitinsville, Massachusetts, and worked at the Colt Armory in Hartford, Connecticut, until 1863; he then entered the employ of Pratt \& Whitney, also in Hartford. He later formed a partnership with J.H.Prest and William Parsons manufacturing millwork and tools, the firm being known as Bullard \& Prest. In 1866 Bullard organized the Norwalk Iron Works Company of Norwalk, Connecticut, but afterwards withdrew and continued the business in Hartford. In 1868 the firm of Bullard \& Prest was dissolved and Bullard became Superintendent of a large machine shop in Athens, Georgia. He later organized the machine tool department of Post \& Co. at Cincinnati, and in 1872 he was made General Superintendent of the Gill Car Works at Columbus, Ohio. In 1875 he established a machinery business in Beekman Street, New York, under the name of Allis, Bullard \& Co. Mr Allis withdrew in 1877, and the Bullard Machine Company was organized.
    In 1880 Bullard secured entire control of the business and also became owner of the Bridgeport Machine Tool Works, Bridgeport, Connecticut. In 1883 he designed his first vertical boring and turning mill with a single head and belt feed and a 37 in. (94 cm) capacity; this was the first small boring machine designed to do the accurate work previously done on the face plate of a lathe. In 1889 Bullard gave up his New York interests and concentrated his entire attention on manufacturing at Bridgeport, the business being incorporated in 1894 as the Bullard Machine Tool Company. The company specialized in the construction of boring machines, the design being developed so that it became essentially a vertical turret lathe. After Bullard's death, his son Edward Payson Bullard II (b. 10 July 1872 Columbus, Ohio, USA; d. 26 June 1953 Fairfield, Connecticut, USA) continued as head of the company and further developed the boring machine into a vertical multi-spindle automatic lathe which he called the "Mult-au-matic" lathe. Both father and son were members of the American Society of Mechanical Engineers.
    [br]
    Further Reading
    J.W.Roe, 1916, English and American Tool Builders, New Haven: Yale University Press; repub. 1926, New York and 1987, Bradley, Ill.: Lindsay Publications Inc. (describes Bullard's machines).
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    Biographical history of technology > Bullard, Edward Payson

  • 13 Holtzapffel, Charles

    [br]
    b. 1806 London, England
    d. 11 April 1847 London, England
    [br]
    English mechanical engineer and author of Turning and Mechanical Manipulation.
    [br]
    Charles Holtzapffel was the son of John Holtzapffel, a native of Germany who settled in London c.1787 and set up as a manufacturer of lathes and tools for amateur mechanics. Charles Holtzapffel received a good English education and training in his father's workshop, and subsequently became a partner and ultimately succeeded to the business. He was engaged in the construction of machinery for printing banknotes, of lathes for cutting rosettes and for ornamental and plain turning. Holtzapffel is chiefly remembered for his monumental work entitled Turning and Mechanical Manipulation, intended as a work of general reference and practical instruction on the lathe. Publication began in 1843 and only the first two volumes were published in his lifetime. A third volume was edited by his widow from his notes and published shortly after his death. The fourth and fifth volumes were completed by his son, John Jacob Holtzapffel, more than thirty years later. Holtzapffel was an Associate of the Institution of Civil Engineers and served on its Council: he was also a member of the Society of Arts and Chairman of its Committee on Mechanics.
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    Biographical history of technology > Holtzapffel, Charles

  • 14 Ramsden, Jesse

    [br]
    b. 6 October 1735 (?) Halifax, Yorkshire, England
    d. 5 November 1800 Brighton, Sussex, England
    [br]
    English instrument-maker who developed machines for accurately measuring angular and linear scales.
    [br]
    Jesse Ramsden was the son of an innkeeper but received a good general education: after attending the free school at Halifax, he was sent at the age of 12 to his uncle for further study, particularly in mathematics. At the age of 16 he was apprenticed to a cloth-worker in Halifax and on completion of the apprenticeship in 1755 he moved to London to work as a clerk in a cloth warehouse. In 1758 he became an apprentice in the workshop of a London mathematical instrument-maker named Burton. He quickly gained the skill, particularly in engraving, and by 1762 he was able to set up on his own account. He married in 1765 or 1766 the youngest daughter of the optician John Dollond FRS (1706– 61) and received a share of Dollond's patent for making achromatic lenses.
    Ramsden's experience and reputation increased rapidly and he was generally regarded as the leading instrument-maker of his time. He opened a shop in the Haymarket and transferred to Piccadilly in 1775. His staff increased to about sixty workers and apprentices, and by 1789 he had constructed nearly 1,000 sextants as well as theodolites, micrometers, balances, barometers, quadrants and other instruments.
    One of Ramsden's most important contributions to precision measurement was his development of machines for obtaining accurate division of angular and linear scales. For this work he received a premium from the Commissioners of the Board of Longitude, who published his descriptions of the machines. For the trigonometrical survey of Great Britain, initiated by General William Roy FRS (1726–90) and continued by the Board of Ordnance, Ramsden supplied a 3 ft (91 cm) theodolite and steel measuring chains, and was also engaged to check the glass tubes used to measure the fundamental base line.
    [br]
    Principal Honours and Distinctions
    FRS 1786; Royal Society Copley Medal 1795. Member, Imperial Academy of St Petersburg 1794. Member, Smeatonian Society of Civil Engineers 1793.
    Bibliography
    Instruments, London.
    1779, "Description of two new micrometers", Philosophical Transactions of the Royal Society 69:419–31.
    1782, "A new construction of eyeglasses for such telescopes as may be applied to mathematical instruments", Philosophical Transactions of the Royal Society 73:94–99.
    Further Reading
    R.S.Woodbury, 1961, History of the Lathe to 1850, Cleveland, Ohio; W.Steeds, 1969, A History of Machine Tools 1700–1910, Oxford (both provide a brief description of Ramsden's dividing machines).
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    Biographical history of technology > Ramsden, Jesse

  • 15 Smeaton, John

    [br]
    b. 8 June 1724 Austhorpe, near Leeds, Yorkshire, England
    d. 28 October 1792 Austhorpe, near Leeds, Yorkshire, England
    [br]
    English mechanical and civil engineer.
    [br]
    As a boy, Smeaton showed mechanical ability, making for himself a number of tools and models. This practical skill was backed by a sound education, probably at Leeds Grammar School. At the age of 16 he entered his father's office; he seemed set to follow his father's profession in the law. In 1742 he went to London to continue his legal studies, but he preferred instead, with his father's reluctant permission, to set up as a scientific instrument maker and dealer and opened a shop of his own in 1748. About this time he began attending meetings of the Royal Society and presented several papers on instruments and mechanical subjects, being elected a Fellow in 1753. His interests were turning towards engineering but were informed by scientific principles grounded in careful and accurate observation.
    In 1755 the second Eddystone lighthouse, on a reef some 14 miles (23 km) off the English coast at Plymouth, was destroyed by fire. The President of the Royal Society was consulted as to a suitable engineer to undertake the task of constructing a new one, and he unhesitatingly suggested Smeaton. Work began in 1756 and was completed in three years to produce the first great wave-swept stone lighthouse. It was constructed of Portland stone blocks, shaped and pegged both together and to the base rock, and bonded by hydraulic cement, scientifically developed by Smeaton. It withstood the storms of the English Channel for over a century, but by 1876 erosion of the rock had weakened the structure and a replacement had to be built. The upper portion of Smeaton's lighthouse was re-erected on a suitable base on Plymouth Hoe, leaving the original base portion on the reef as a memorial to the engineer.
    The Eddystone lighthouse made Smeaton's reputation and from then on he was constantly in demand as a consultant in all kinds of engineering projects. He carried out a number himself, notably the 38 mile (61 km) long Forth and Clyde canal with thirty-nine locks, begun in 1768 but for financial reasons not completed until 1790. In 1774 he took charge of the Ramsgate Harbour works.
    On the mechanical side, Smeaton undertook a systematic study of water-and windmills, to determine the design and construction to achieve the greatest power output. This work issued forth as the paper "An experimental enquiry concerning the natural powers of water and wind to turn mills" and exerted a considerable influence on mill design during the early part of the Industrial Revolution. Between 1753 and 1790 Smeaton constructed no fewer than forty-four mills.
    Meanwhile, in 1756 he had returned to Austhorpe, which continued to be his home base for the rest of his life. In 1767, as a result of the disappointing performance of an engine he had been involved with at New River Head, Islington, London, Smeaton began his important study of the steam-engine. Smeaton was the first to apply scientific principles to the steam-engine and achieved the most notable improvements in its efficiency since its invention by Newcomen, until its radical overhaul by James Watt. To compare the performance of engines quantitatively, he introduced the concept of "duty", i.e. the weight of water that could be raised 1 ft (30 cm) while burning one bushel (84 lb or 38 kg) of coal. The first engine to embody his improvements was erected at Long Benton colliery in Northumberland in 1772, with a duty of 9.45 million pounds, compared to the best figure obtained previously of 7.44 million pounds. One source of heat loss he attributed to inaccurate boring of the cylinder, which he was able to improve through his close association with Carron Ironworks near Falkirk, Scotland.
    [br]
    Principal Honours and Distinctions
    FRS 1753.
    Bibliography
    1759, "An experimental enquiry concerning the natural powers of water and wind to turn mills", Philosophical Transactions of the Royal Society.
    Towards the end of his life, Smeaton intended to write accounts of his many works but only completed A Narrative of the Eddystone Lighthouse, 1791, London.
    Further Reading
    S.Smiles, 1874, Lives of the Engineers: Smeaton and Rennie, London. A.W.Skempton, (ed.), 1981, John Smeaton FRS, London: Thomas Telford. L.T.C.Rolt and J.S.Allen, 1977, The Steam Engine of Thomas Newcomen, 2nd edn, Hartington: Moorland Publishing, esp. pp. 108–18 (gives a good description of his work on the steam-engine).
    LRD

    Biographical history of technology > Smeaton, John

  • 16 Westinghouse, George

    [br]
    b. 6 October 1846 Central Bridge, New York, USA
    d. 12 March 1914 New York, New York, USA
    [br]
    American inventor and entrepreneur, pioneer of air brakes for railways and alternating-current distribution of electricity.
    [br]
    George Westinghouse's father was an ingenious manufacturer of agricultural implements; the son, after a spell in the Union Army during the Civil War, and subsequently in the Navy as an engineer, went to work for his father. He invented a rotary steam engine, which proved impracticable; a rerailing device for railway rolling stock in 1865; and a cast-steel frog for railway points, with longer life than the cast-iron frogs then used, in 1868–9. During the same period Westinghouse, like many other inventors, was considering how best to meet the evident need for a continuous brake for trains, i.e. one by which the driver could apply the brakes on all vehicles in a train simultaneously instead of relying on brakesmen on individual vehicles. By chance he encountered a magazine article about the construction of the Mont Cenis Tunnel, with a description of the pneumatic tools invented for it, and from this it occurred to him that compressed air might be used to operate the brakes along a train.
    The first prototype was ready in 1869 and the Westinghouse Air Brake Company was set up to manufacture it. However, despite impressive demonstration of the brake's powers when it saved the test train from otherwise certain collision with a horse-drawn dray on a level crossing, railways were at first slow to adopt it. Then in 1872 Westinghouse added to it the triple valve, which enabled the train pipe to charge reservoirs beneath each vehicle, from which the compressed air would apply the brakes when pressure in the train pipe was reduced. This meant that the brake was now automatic: if a train became divided, the brakes on both parts would be applied. From then on, more and more American railways adopted the Westinghouse brake and the Railroad Safety Appliance Act of 1893 made air brakes compulsory in the USA. Air brakes were also adopted in most other parts of the world, although only a minority of British railway companies took them up, the remainder, with insular reluctance, preferring the less effective vacuum brake.
    From 1880 Westinghouse was purchasing patents relating to means of interlocking railway signals and points; he combined them with his own inventions to produce a complete signalling system. The first really practical power signalling scheme, installed in the USA by Westinghouse in 1884, was operated pneumatically, but the development of railway signalling required an awareness of the powers of electricity, and it was probably this that first led Westinghouse to become interested in electrical processes and inventions. The Westinghouse Electric Company was formed in 1886: it pioneered the use of electricity distribution systems using high-voltage single-phase alternating current, which it developed from European practice. Initially this was violently opposed by established operators of direct-current distribution systems, but eventually the use of alternating current became widespread.
    [br]
    Principal Honours and Distinctions
    Légion d'honneur. Order of the Crown of Italy. Order of Leopold.
    Bibliography
    Westinghouse took out some 400 patents over forty-eight years.
    Further Reading
    H.G.Prout, 1922, A Life of "George Westinghouse", London (biography inclined towards technicalities).
    F.E.Leupp, 1918, George Westinghouse: His Life and Achievements, Boston (London 1919) (biography inclined towards Westinghouse and his career).
    J.F.Stover, 1961, American Railroads, Chicago: University of Chicago Press, pp. 152–4.
    PJGR

    Biographical history of technology > Westinghouse, George

  • 17 Wilkinson, David

    [br]
    b. 5 January 1771 Smithfield (now Slatersville), Rhode Island, USA
    d. 3 February 1852 Caledonia Springs, Ontario, Canada
    [br]
    American mechanical engineer and inventor of a screw-cutting lathe.
    [br]
    David Wilkinson was the third son of Oziel Wilkinson (1744–1815), a blacksmith who c.1783 established at Pawtucket, Rhode Island, a plant for making farm tools and domestic utensils. This enterprise he steadily expanded with the aid of his sons, until by 1800 it was regarded as the leading iron and machinery manufacturing business in New England. At the age of 13, David Wilkinson entered his father's workshops. Their products included iron screws, and the problem of cutting the threads was one that engaged his attention. After working on it for some years he devised a screw-cutting lathe, for which he obtained a patent in 1798. In about 1800 David and his brother Daniel established their own factory at Pawtucket, known as David Wilkinson \& Co., where they specialized in the manufacture of textile machinery. Later they began to make cast cannon and installed a special boring machine for machining them. The firm prospered until 1829, when a financial crisis caused its collapse. David Wilkinson set up a new business in Cohoes, New York, but this was not a success and from 1836 he travelled around finding work chiefly in canal and bridge construction in New Jersey, Ohio and Canada. In 1848 he petitioned Congress for some reward for his invention of the screw-cutting lathe of 1798; he was awarded $10,000.
    [br]
    Further Reading
    J.W.Roe, 1916, English and American Tool Builders, New Haven; reprinted 1926, New York, and 1987, Bradley, Ill. (provides a short account of David Wilkinson and his work).
    R.S.Woodbury, 1961, History of the Lathe to 1850, Cleveland, Ohio (includes a description of Wilkinson's screw-cutting lathe).
    RTS

    Biographical history of technology > Wilkinson, David

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