英语词汇“royal pendulum”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

royal pendulum n. Clockmaking (now chiefly historical) a pendulum having a period of one second, given by a length of 39.14 in (99.42 cm).Such pendulums were used from the late 1660s in English long-case clocks, much improving the timekeeping over earlier, shorter pendulums.

ΚΠ

1694 J. Smith Horol. Disquis. 4 The Vibrations of this Pendulum of Mr Clement's contrivance is so very exact and steady, that..it shall..keep so equal a Time, that no Human Art can discover the least considerable Difference in any of its Revolutions, an excellence to which no other known Motion can as yet pretend, and for which I think it will not be improper now, at last, to call it the Royal Pendulum.

1764 B. Martin New & Comprehensive Syst. Math. Inst. II. 379 By this Means, the usual Time the Clock will go, is 8 Days in those called Royal Pendulum.

1852 C. Tomlinson Cycl. Useful Arts (1854) II. 23/2 The most important invention of this period was the anchor escapement... The seconds pendulum with this escapement was called the royal pendulum.

1910 W. A. Dyer Lure of Antique 123 The long or royal pendulum is supposed to have been invented by Richard Harris in 1641, but it was not used for these chamber clocks until 1680.

2005 A. Chapman England's Leonardo 85 These clocks incorporated Hooke's anchor escapement in conjunction with the ‘Royal Pendulum’, which was a pendulum 39.25 inches long.

单词	royal pendulum
释义	> as lemmas royal pendulum royal pendulum n. Clockmaking (now chiefly historical) a pendulum having a period of one second, given by a length of 39.14 in (99.42 cm).Such pendulums were used from the late 1660s in English long-case clocks, much improving the timekeeping over earlier, shorter pendulums. ΚΠ 1694 J. Smith Horol. Disquis. 4 The Vibrations of this Pendulum of Mr Clement's contrivance is so very exact and steady, that..it shall..keep so equal a Time, that no Human Art can discover the least considerable Difference in any of its Revolutions, an excellence to which no other known Motion can as yet pretend, and for which I think it will not be improper now, at last, to call it the Royal Pendulum. 1764 B. Martin New & Comprehensive Syst. Math. Inst. II. 379 By this Means, the usual Time the Clock will go, is 8 Days in those called Royal Pendulum. 1852 C. Tomlinson Cycl. Useful Arts (1854) II. 23/2 The most important invention of this period was the anchor escapement... The seconds pendulum with this escapement was called the royal pendulum. 1910 W. A. Dyer Lure of Antique 123 The long or royal pendulum is supposed to have been invented by Richard Harris in 1641, but it was not used for these chamber clocks until 1680. 2005 A. Chapman England's Leonardo 85 These clocks incorporated Hooke's anchor escapement in conjunction with the ‘Royal Pendulum’, which was a pendulum 39.25 inches long. extracted from royaladj.n. < as lemmas
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