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1 Bramah, Joseph
SUBJECT AREA: Civil engineering, Domestic appliances and interiors, Land transport, Mechanical, pneumatic and hydraulic engineering, Public utilities[br]b. 2 April 1749 Stainborough, Yorkshire, Englandd. 9 December 1814 Pimlico, London, England[br]English inventor of the second patented water-closet, the beer-engine, the Bramah lock and, most important, the hydraulic press.[br]Bramah was the son of a tenant farmer and was educated at the village school before being apprenticed to a local carpenter, Thomas Allot. He walked to London c.1773 and found work with a Mr Allen that included the repair of some of the comparatively rare water-closets of the period. He invented and patented one of his own, which was followed by a water cock in 1783. His next invention, a greatly improved lock, involved the devising of a number of special machine tools, for it was one of the first devices involving interchangeable components in its manufacture. In this he had the help of Henry Maudslay, then a young and unknown engineer, who became Bramah's foreman before setting up business on his own. In 1784 he moved his premises from Denmark Street, St Giles, to 124 Piccadilly, which was later used as a showroom when he set up a factory in Pimlico. He invented an engine for putting out fires in 1785 and 1793, in effect a reciprocating rotary-vane pump. He undertook the refurbishment and modernization of Norwich waterworks c.1793, but fell out with Robert Mylne, who was acting as Consultant to the Norwich Corporation and had produced a remarkably vague specification. This was Bramah's only venture into the field of civil engineering.In 1797 he acted as an expert witness for Hornblower \& Maberley in the patent infringement case brought against them by Boulton and Watt. Having been cut short by the judge, he published his proposed evidence in "Letter to the Rt Hon. Sir James Eyre, Lord Chief Justice of the Common Pleas…etc". In 1795 he was granted his most important patent, based on Pascal's Hydrostatic Paradox, for the hydraulic press which also incorporated the concept of hydraulics for the transmission of both power and motion and was the foundation of the whole subsequent hydraulic industry. There is no truth in the oft-repeated assertion originating from Samuel Smiles's Industrial Biography (1863) that the hydraulic press could not be made to work until Henry Maudslay invented the self-sealing neck leather. Bramah used a single-acting upstroking ram, sealed only at its base with a U-leather. There was no need for a neck leather.He also used the concept of the weight-loaded, in this case as a public-house beer-engine. He devised machinery for carbonating soda water. The first banknote-numbering machine was of his design and was bought by the Bank of England. His development of a machine to cut twelve nibs from one goose quill started a patent specification which ended with the invention of the fountain pen, patented in 1809. His coach brakes were an innovation that was followed bv a form of hydropneumatic carriage suspension that was somewhat in advance of its time, as was his patent of 1812. This foresaw the introduction of hydraulic power mains in major cities and included the telescopic ram and the air-loaded accumulator.In all Joseph Bramah was granted eighteen patents. On 22 March 1813 he demonstrated a hydraulic machine for pulling up trees by the roots in Hyde Park before a large crowd headed by the Duke of York. Using the same machine in Alice Holt Forest in Hampshire to fell timber for ships for the Navy, he caught a chill and died soon after at his home in Pimlico.[br]Bibliography1778, British patent no. 1177 (water-closet). 1784, British patent no. 1430 (Bramah Lock). 1795, British patent no. 2045 (hydraulic press). 1809, British patent no. 3260 (fountain pen). 1812, British patent no. 3611.Further ReadingI.McNeil, 1968, Joseph Bramah, a Century of Invention.S.Smiles, 1863, Industrial Biography.H.W.Dickinson, 1942, "Joseph Bramah and his inventions", Transactions of the Newcomen Society 22:169–86.IMcN -
2 Clement (Clemmet), Joseph
SUBJECT AREA: Mechanical, pneumatic and hydraulic engineering[br]bapt. 13 June 1779 Great Asby, Westmoreland, Englandd. 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 DistinctionsSociety of Arts Gold Medal 1818 (for straightline mechanism), 1827 (for facing lathe); Silver Medal 1828 (for lathe-driving device).BibliographyExamples of Clement's draughtsmanship can be found in the Transactions of the Society of Arts 33 (1817), 36 (1818), 43 (1925), 46 (1828) and 48 (1829).Further ReadingS.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).RTSBiographical history of technology > Clement (Clemmet), Joseph
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3 Donkin, Bryan IV
[br]b. 29 April 1903 London, Englandd. 17 October 1964 Albury, Surrey, England[br]English electrical engineer.[br]Bryan Donkin IV was the son of S.B.Donkin (1871–1952) and the great-great-grandson of Bryan Donkin I (1768–1855). He was educated at Gresham's School in Holt, and at Pembroke College, Cambridge. He served a three-year apprenticeship with the English Electric Company Ltd, followed by a special one-year course with the General Electric Company of America. He became a partner in the consulting firm of Kennedy \& Donkin in 1933 (see Donkin, Bryan III) and was associated with the construction of 132 kV and 275 kV overhead-transmission lines in Britain and with many electricity generating schemes. He was responsible for the design of the Pimlico district heating scheme, and was a member of the Institution of Civil Engineers, the Institution of Electrical Engineers and the American Institute of Electrical Engineers.[br]Principal Honours and DistinctionsPresident, Association of Supervising Electrical Engineers 1954–6. President, Engineer's Guild 1954–6. President, Junior Institution of Engineers 1956–7. Vice-President, Institution of Electrical Engineers 1960–4.RTS
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