-
21 Zeiss, Carl
SUBJECT AREA: Photography, film and optics[br]b. 11 September 1816 Weimar, Thuringia, Germanyd. 3 December 1888 Jena, Saxony, Germany[br]German lens manufacturer who introduced scientific method to the production of compound microscopes and made possible the production of the first anastigmatic photographic objectives.[br]After completing his early education in Weimar, Zeiss became an apprentice to the engineer Dr Frederick Koerner. As part of his training, Zeiss was required to travel widely and he visited Vienna, Berlin, Stuttgart and Darmstadt to study his trade. In 1846 he set up a business of his own, an optical workshop in Jena, where he began manufacturing magnifying glasses and microscopes. Much of his work was naturally for the university there and he had the co-operation of some of the University staff in the development of precision instruments. By 1858 he was seeking to make more expensive compound microscopes, but he found the current techniques primitive and laborious. He decided that it was necessary to introduce scientific method to the design of the optics, and in 1866 he sought the advice of a professor of physics at the University of Jena, Ernst Abbe (1840–1905). It took Zeiss until 1869 to persuade Abbe to join his company, and two difficult years were spent working on the calculations before success was achieved. Within a few more years the Zeiss microscope had earned a worldwide reputation for quality. Abbe became a full partner in the Zeiss business in 1875. In 1880 Abbe began an association with Friedrich Otte Schott that was to lead to the establishment of the famous Jena glass works in 1884. With the support of the German government, Jena was to become the centre of world production of new optical glasses for photographic objectives.In 1886 the distinguished mathematician and optician Paul Rudolph joined Zeiss at Jena. After Zeiss's death, Rudolph went on to use the characteristics of the new glass to calculate the first anastigmatic lenses. Immediately successful and widely imitated, the anastigmats were also the first of a long series of Zeiss photographic objectives that were to be at the forefront of lens design for years to come. Abbe took over the management of the company and developed it into an internationally famous organization.[br]Further ReadingL.W.Sipley, 1965, Photography's Great Inventors, Philadelphia (a brief biography). J.M.Eder, 1945, History of Photography, trans. E.Epstean, New York.K.J.Hume, 1980, A History of Engineering Metrology, London, 122–32 (includes a short account of Carl Zeiss and his company).JW / RTS -
22 трудоёмкий метод испытания
Metallurgy: laborious test methodУниверсальный русско-английский словарь > трудоёмкий метод испытания
-
23 Cort, Henry
SUBJECT AREA: Metallurgy[br]b. 1740 Lancaster, Englandd. 1800 Hampstead, near London, England[br]English ironmaster, inventor of the puddling process and grooved rollers for forming iron into bars.[br]His father was a mason and brickmaker but, anxious to improve himself, Cort set up in London in 1765 as a navy agent, said to have been a profitable business. He recognized that, at that time, the conversion of pig iron to malleable or wrought iron, which was needed in increasing quantities as developments in industry and mechanical engineering gathered pace, presented a bottleneck in the ironmaking process. The finery hearth was still in use, slow and inefficient and requiring the scarce charcoal as fuel. To tackle this problem, Cort gave up his business and acquired a furnace and slitting mill at Fontley, near Fareham in Hampshire. In 1784 he patented his puddling process, by which molten pig iron on the bed of a reverberatory furnace was stirred with an iron bar and, by the action of the flame and the oxygen in the air, the carbon in the pig iron was oxidized, leaving nearly pure iron, which could be forged to remove slag. In this type of furnace, the fuel and the molten iron were separated, so that the cheaper coal could be used as fuel. It was the stirring action with the iron bar that gave the name "puddling" to the process. Others had realized the problem and reached a similar solution, notably the brothers Thomas and George Cranage, but only Cort succeeded in developing a commercially viable process. The laborious hammering of the ball of iron thus produced was much reduced by an invention of the previous year, 1783. This too was patented. The iron was passed between grooved rollers to form it into bars. Cort entered into an agreement with Samuel Jellico to set up an ironworks at Gosport to exploit his inventions. Samuel's father Adam, Deputy Paymaster of the Navy, advanced capital for this venture, Cort having expended much of his own resources in the experimental work that preceded his inventions. However, it transpired that Jellico senior had, unknown to Cort, used public money to advance the capital; the Admiralty acted to recover the money and Cort lost heavily, including the benefits from his patents. Rival ironmasters were quick to pillage the patents. In 1790, and again the following year, Cort offered unsuccessfully to work for the military. Finally, in 1794, at the instigation of the Prime Minister, William Pitt the Younger, Cort was paid a pension of £200 per year in recognition of the value of his improvements in the technology of ironmaking, although this was reduced by deductions to £160. After his death, the pension to his widow was halved, while some of his children received a pittance. Without the advances made by Cort, however, the iron trade could not have met the rapidly increasing demand for iron during the industrial revolution.[br]Bibliography1787, A Brief State of Facts Relative to the New Method of Making Bar Iron with Raw Pit Coal and Grooved Rollers (held in the Science Museum Library archive collection).Further ReadingH.W.Dickinson, 1941, "Henry Cort's bicentary", Transactions of the Newcomen Society 21: 31–47 (there are further references to grooved rollers and the puddling process in Vol. 49 of the same periodical (1978), on pp. 153–8).R.A.Mott, 1983, Henry Con, the Great Finery Creator of Puddled Iron, Sheffield: Historical Metallurgy Society.LRD -
24 umständlich
- 1
- 2
См. также в других словарях:
Method ringing — (also known as scientific ringing) is a form of change ringing (the practice of ringing a series of mathematical permutations on tuned bells, rather than a melody). In method ringing, the ringers are guided from permutation to permutation by… … Wikipedia
laborious — adjective 1 laborious task/process/method etc a job or piece of work that is difficult and needs a lot of effort: the laborious task of collating all the evidence 2 seeming to be done slowly and with difficulty: laborious progress through the… … Longman dictionary of contemporary English
History of scientific method — The history of scientific method is inseparable from the history of science itself. The development and elaboration of rules for scientific reasoning and investigation has not been straightforward; scientific method has been the subject of… … Wikipedia
painting — /payn ting/, n. 1. a picture or design executed in paints. 2. the act, art, or work of a person who paints. 3. the works of art painted in a particular manner, place, or period: a book on Flemish painting. 4. an instance of covering a surface… … Universalium
Discovery of Neptune — New Berlin Observatory at Linden Street, where Neptune was discovered observationally. Neptune was mathematically predicted before it was directly observed. With a prediction by Urbain Le Verrier, telescopic observations confirming the existence… … Wikipedia
Tugaya, Lanao del Sur — Tugaya (alternate spelling: Togaya) is a 4th class municipality in the province of Lanao del Sur, Philippines. According to the 2000 census, it has a population of 20,139 people in 2,391 households.GeographyTugaya has a land area of 4028 hectares … Wikipedia
Sennacherib — /seuh nak euhr ib/, n. died 681 B.C., king of Assyria 705 681. * * * died January 681 BC King of Assyria (r. 705/704–681 BC), son and successor of Sargon II. Between 703 and 689 he undertook six campaigns against Elam (southwestern Iran), which… … Universalium
John Couch Adams — Infobox Scientist name = John Couch Adams box width = 300px image width = 240px caption = birth date = birth date|1819|06|15 birth place = Laneast, Cornwall, Great Britain death date = death date and age|1892|01|21|1819|06|15 death place =… … Wikipedia
Arepa — The arepa is a corn based bread from the northern Andes in South America (from countries like Colombia and Venezuela), now spread to other areas in modern Latin American countries. It is similar to the mesoamerican tortilla. Arepas are most… … Wikipedia
François, Jean-Charles — ▪ French etcher and engraver born March 4, 1717, Nancy, Fr. died March 21, 1769, Paris French etcher and engraver who was one of the inventors of the crayon method in engraving a process devised to imitate the grainy effect of chalk, pastel … Universalium
DNA sequencing — Part of a series on Genetics Key components Chromosome DNA • RNA Genome Heredity Mutation Nucleotide Variation … Wikipedia
