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41 Polhem, Christopher
SUBJECT AREA: Mining and extraction technology[br]b. 18 December 1661 Tingstade, Gotland, Sweden d. 1751[br]Swedish engineer and inventor.[br]He was the eldest son of Wolf Christopher Polhamma, a merchant. The father died in 1669 and the son was sent by his stepfather to an uncle in Stockholm who found him a place in the Deutsche Rechenschule. After the death of his uncle, he was forced to find employment, which he did with the Biorenklou family near Uppsala where he eventually became a kind of estate bailiff. It was during this period that he started to work with a lathe, a forge and at carpentry, displaying great technical ability. He realized that without further education he had little chance of making anything of his life, and accordingly, in 1687, he registered at the University of Uppsala where he studied astronomy and mathematics, remaining there for three years. He also repaired two astronomical pendulum clocks as well as the decrepit medieval clock in the cathedral. After a year's work he had this clock running properly: this was his breakthrough. He was summoned to Stockholm where the King awarded him a salary of 500 dalers a year as an encouragement to further efforts. Around this time, one of increasing mechanization and when mining was Sweden's principal industry, Pohlem made a model of a hoist frame for mines and the Mines Authority encouraged him to develop his ideas. In 1693 Polhem completed the Blankstot hoist at the Stora Kopparberg mine, which attracted great interest on the European continent.From 1694 to 1696 Polhem toured factories, mills and mines abroad in Germany, Holland, England and France, studying machinery of all kinds and meeting many foreign engineers. In 1698 he was appointed Director of Mining Engineering in Sweden, and in 1700 he became Master of Construction in the Falu Mine. He installed the Karl XII hoist there, powered by moving beams from a distant water-wheel. His plan of 1697 for all the machinery at the Falu mine to be driven by three large and remote water-wheels was never completed.In 1707 he was invited by the Elector of Hanover to visit the mines in the Harz district, where he successfully explained many of his ideas which were adopted by the local engineers. In 1700, in conjunction with Gabriel Stierncrona, he founded the Stiersunds Bruk at Husby in Southern Dalarna, a factory for the mass production of metal goods in iron, steel and bronze. Simple articles such as pans, trays, bowls, knives, scissors and mirrors were made there, together with the more sophisticated Polhem lock and the Stiersunds clock. Production was based on water power. Gear cutting for the clocks, shaping hammers for plates, file cutting and many other operations were all water powered, as was a roller mill for the sheet metal used in the factory. He also designed textile machinery such as stocking looms and spinning frames and machines for the manufacture of ribbons and other things.In many of his ideas Polhem was in advance of his time and Swedish country society was unable to absorb them. This was largely the reason for the Stiersund project being only a partial success. Polhem, too, was of a disputatious nature, self-opinionated almost to the point of conceit. He was a prolific writer, leaving over 20,000 pages of manuscript notes, drafts, essays on a wide range of subjects, which included building, brick-making, barrels, wheel-making, bell-casting, organ-building, methods of stopping a horse from bolting and a curious tap "to prevent serving maids from sneaking wine from the cask", the construction of ploughs and threshing machines. His major work, Kort Berattelse om de Fornamsta Mechaniska Inventioner (A Brief Account of the Most Famous Inventions), was printed in 1729 and is the main source of knowledge about his technological work. He is also known for his "mechanical alphabet", a collection of some eighty wooden models of mechanisms for educational purposes. It is in the National Museum of Science and Technology in Stockholm.[br]Bibliography1729, Kort Berattelse om de Fornamsta Mechaniska Inventioner (A Brief Account of the Most Famous Inventions).Further Reading1985, Christopher Polhem, 1661–1751, TheSwedish Daedalus' (catalogue of a travelling exhibition from the Swedish Institute in association with the National Museum of Science and Technology), Stockholm.IMcN -
42 rule
1. n1) правило; устав; норма; право2) власть; владычество; господство; правление; управление•to accept rules — одобрять / признавать правила
to adhere to a rule — придерживаться правила, соблюдать правило
to apply rules to smb / smth — применять правила к кому-л. / чему-л.
to be subject to / to be under foreign rule — находиться под иностранным владычеством
to breach / to break a rule — нарушать правило
to comply with / to conform to a rule — придерживаться правила, соблюдать правило
to emerge from military to civilian rule — переходить от правления военных к гражданскому правительству
to frame rules — вырабатывать / определять / составлять правила
to impose / to introduce smb's rule — вводить чье-л. правление
to maintain rules — поддерживать / соблюдать правила
to note an infringement / a violation of the rules — констатировать нарушение правил
to obey / to observe a rule — придерживаться правила, соблюдать правило
to overthrow / to throw off smb's rule — свергать кого-л.
to put a territory under direct rule from... — ставить территорию под прямое управление из...
to put an end to smb's rule — покончить с чьим-л. господством, положить конец чьему-л. господству
to remain under smb's rule — оставаться под чьим-л. управлением
to revert to smb's rule — возвращаться под чье-л. управление
to stick to a rule — придерживаться правила, соблюдать правило
to submit to the rules — подчиняться правилам, придерживаться правил
- abidance by the rulesto suffer from smb's rule — страдать от чьего-л. гнета
- advent of smb's rule
- against international rules of behavior
- alien rule
- arbitrary rule
- army rules
- authoritarian rule
- autocratic rule
- bending of rules
- British rule
- central government rule
- civil rule
- civilian rule
- closed rule
- common rule
- constitutional rule
- contractual rules
- direct presidential rule
- direct rule of Northern Ireland from London
- direct rule
- domestic rules
- during smb's rule
- economic rule
- emergency rule
- eunuch rule
- executive rule
- existing rules
- financial rules
- foreign rule
- forms of political rule
- fundamental rules
- gag rule
- gavel rule
- general rule
- generally accepted rules
- generally recognized rules
- genocidal rule
- ground rules
- handover to a civilian rule
- hard-and-fast rule
- home rule
- humanitarian rules
- immigration rules
- imposition of Central Government rule
- in accordance with the rules
- in conformity with the rules
- incompatibility with the rules of behavior
- industrial safety rules
- infringement of the rules of procedure
- international rules
- iron hand rule
- job safety rules
- legal rules
- majority rule
- mandate rule
- manipulation of rules
- military rule
- mob rule
- monopoly rule
- multilateral rules
- no-strike rule
- one-party rule
- one-time rule
- open rule
- operating rules
- over-riding of rules
- parliamentary checks on presidential rule
- party rules
- pertinent rules
- police rule
- political rule
- Ponsonby Rule
- popular democratic rule
- presidential rule
- previous question rule
- procedure rules
- provisional rule
- proxy rule
- repressive rule
- restoration of civilian rule
- return of civilian rule
- revised rules
- Rule of the Court - rule of foreign capital
- rule of germaneness
- rule of law
- rule of terror
- rule of the gun
- rule of the military
- rule of unanimity of great powers
- rules and customs of war - rules for international trade
- rules governing smth
- rules inherited from
- rules laid down in smth
- rules of confidentiality
- rules of international law
- rules prescribed by smb
- rules relating to trade
- set rule
- single-party rule
- special rule
- staff rule
- standing rule
- striving for economic rule
- ten minute rule
- terms of the rules of procedure
- totalitarian rule
- trade rules
- transition from military to civilian rule
- treaty rules
- unanimity rule
- under smb's rule
- unit rule
- virtual one-party rule
- voting rules
- white minority rule
- world rule 2. v1) править, управлять; господствовать2) постановлять; устанавливать•to rule with an iron fist / rod — править железной рукой
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