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41 ферритовая матрица
1. core array2. core mat3. ferrite core matrixРусско-английский большой базовый словарь > ферритовая матрица
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42 Heathcote, John
SUBJECT AREA: Textiles[br]b. 7 August 1783 Duffield, Derbyshire, Englandd. 18 January 1861 Tiverton, Devonshire, England[br]English inventor of the bobbin-net lace machine.[br]Heathcote was the son of a small farmer who became blind, obliging the family to move to Long Whatton, near Loughborough, c.1790. He was apprenticed to W.Shepherd, a hosiery-machine maker, and became a frame-smith in the hosiery industry. He moved to Nottingham where he entered the employment of an excellent machine maker named Elliott. He later joined William Caldwell of Hathern, whose daughter he had married. The lace-making apparatus they patented jointly in 1804 had already been anticipated, so Heathcote turned to the problem of making pillow lace, a cottage industry in which women made lace by arranging pins stuck in a pillow in the correct pattern and winding around them thread contained on thin bobbins. He began by analysing the complicated hand-woven lace into simple warp and weft threads and found he could dispense with half the bobbins. The first machine he developed and patented, in 1808, made narrow lace an inch or so wide, but the following year he made much broader lace on an improved version. In his second patent, in 1809, he could make a type of net curtain, Brussels lace, without patterns. His machine made bobbin-net by the use of thin brass discs, between which the thread was wound. As they passed through the warp threads, which were arranged vertically, the warp threads were moved to each side in turn, so as to twist the bobbin threads round the warp threads. The bobbins were in two rows to save space, and jogged on carriages in grooves along a bar running the length of the machine. As the strength of this fabric depended upon bringing the bobbin threads diagonally across, in addition to the forward movement, the machine had to provide for a sideways movement of each bobbin every time the lengthwise course was completed. A high standard of accuracy in manufacture was essential for success. Called the "Old Loughborough", it was acknowledged to be the most complicated machine so far produced. In partnership with a man named Charles Lacy, who supplied the necessary capital, a factory was established at Loughborough that proved highly successful; however, their fifty-five frames were destroyed by Luddites in 1816. Heathcote was awarded damages of £10,000 by the county of Nottingham on the condition it was spent locally, but to avoid further interference he decided to transfer not only his machines but his entire workforce elsewhere and refused the money. In a disused woollen factory at Tiverton in Devonshire, powered by the waters of the river Exe, he built 300 frames of greater width and speed. By continually making inventions and improvements until he retired in 1843, his business flourished and he amassed a large fortune. He patented one machine for silk cocoon-reeling and another for plaiting or braiding. In 1825 he brought out two patents for the mechanical ornamentation or figuring of lace. He acquired a sound knowledge of French prior to opening a steam-powered lace factory in France. The factory proved to be a successful venture that lasted many years. In 1832 he patented a monstrous steam plough that is reputed to have cost him over £12,000 and was claimed to be the best in its day. One of its stated aims was "improved methods of draining land", which he hoped would develop agriculture in Ireland. A cable was used to haul the implement across the land. From 1832 to 1859, Heathcote represented Tiverton in Parliament and, among other benefactions, he built a school for his adopted town.[br]Bibliography1804, with William Caldwell, British patent no. 2,788 (lace-making machine). 1808. British patent no. 3,151 (machine for making narrow lace).1809. British patent no. 3,216 (machine for making Brussels lace). 1813, British patent no. 3,673.1825, British patent no. 5,103 (mechanical ornamentation of lace). 1825, British patent no. 5,144 (mechanical ornamentation of lace).Further ReadingV.Felkin, 1867, History of the Machine-wrought Hosiery and Lace Manufacture, Nottingham (provides a full account of Heathcote's early life and his inventions).A.Barlow, 1878, The History and Principles of Weaving by Hand and by Power, London (provides more details of his later years).W.G.Allen, 1958 John Heathcote and His Heritage (biography).M.R.Lane, 1980, The Story of the Steam Plough Works, Fowlers of Leeds, London (for comments about Heathcote's steam plough).W.English, 1969, The Textile Industry, London, and C.Singer (ed.), 1958, A History ofTechnology, Vol. V, Oxford: Clarendon Press (both describe the lace-making machine).RLH -
43 обмотка якоря
Авиация и космонавтика. Русско-английский словарь > обмотка якоря
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