| 单词 | compound screw |
| 释义 | > as lemmascompound screw e. Mechanics and Physics, as in compound axle, compound engine, compound electro-magnet, compound lever, compound locomotive, compound microscope, compound motion, compound screw, compound steam-engine, compound-winding; compound-wound adj. compound machine n. one whose efficiency depends on the combined action of two or more parts. compound pendulum n. (a) a pendulum consisting of a number of weights at fixed distances; an actual material pendulum regarded theoretically, as opposed to a simple pendulum (see below); (b) a compensation pendulum whose rod consists of bars of different metals. ΘΚΠ the world > space > relative position > support > hanging or suspension > [noun] > that which hangs or is suspended > a pendulum > types of compound pendulum1723 simple pendulum1728 inverted pendulum1773 horizontal pendulum1775 conical pendulum1813 spherical pendulum1862 the world > movement > motion in specific manner > alternating or reciprocating motion > oscillation > [noun] > swinging or oscillation of suspended body > that which > pendulum > types of compound pendulum1723 simple pendulum1728 inverted pendulum1773 horizontal pendulum1775 conical pendulum1813 spherical pendulum1862 1723 J. Clarke tr. Rohault's Syst. Nat. Philos. I. i. xiv. 84 As there are Compound Motions, so also are there compound Determinations. 1728 E. Chambers Cycl. at Pendulum Compound Pendulum, is that which consists of several Weights, so fix'd as to retain the same Distance both from one another, and from the Centre about which they vibrate. 1829 Nat. Philos. (Libr. Useful Knowl.) I. Mechanics ii. 10 (Useful Knowl. Soc.) The power may act upon the weight through.. a series of levers, in which case the apparatus is called a composition of levers, or a compound lever. 1829 T. Carlyle German Playwrights in Foreign Rev. Jan. 98 A compound-pendulum, vibrating in the character of scarecrow. 1831 D. Brewster Treat. Optics v. 51 When such a lens is used to magnify the magnified image produced by another lens, the two lenses together constitute a compound microscope. 1838 J. L. Comstock Syst. Nat. Philos. (1839) 46 Compound motion is that motion which is produced by two or more forces, acting in different directions, on the same body, at the same time. 1867 J. Hogg Microscope (ed. 6) i. ii. 31 In the compound microscope, not less than two lenses must be employed. 1879 G. B. Prescott Speaking Telephone (new ed.) p. ii In 1830, Professor Henry deduced from the hypothesis of Ampère..the compound electro-magnet. 1884 S. P. Thompson Dynamo-electr. Machinery 96 Compound windings may be arranged in several different ways. If wound on the same core the shunt coils are sometimes wound outside the series coils: less frequently the series coils are outside the shunt. 1884 S. P. Thompson Dynamo-electr. Machinery 98 The compound-wound or self-regulating dynamos. 1886 M. Reynolds Engineman's Pocket Comp. iii. 25 A compound engine is a condensing engine in which the mechanical action of the steam is begun in one cylinder and ended in a larger cylinder. 1902 Encycl. Brit. XXVII. 587/2 Compound-winding..was first used by S. A. Varley and by Brush. 1947 Aeroplane 12 Sept. 385/3 The engine was then compared with a turbo-prop. engine..assuming the same maximum temperature as the compound engine required. 1949 Aero Digest Mar. 30/2 A simple compound engine..is a conventional reciprocating engine, to which a ‘blow down’ turbine has been added to utilize the velocity energy of the exhaust. < as lemmas |
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