英语词汇“fast and loose pulley”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

2. Mechanics. Designating an arrangement of two pulleys on a revolving shaft which enables a machine to be engaged and disengaged; esp. in fast and loose pulley.The fast (fixed) pulley transmits power from the machine. When the machine is to be stopped, the belt switches to the loose (freely rotating) pulley.

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1809 A. Rees Cycl. (1819) XII. at Diagonal If this engine is to be wrought by the application of any moving power, a fast and loose pulley may be placed on the axis of the cutter P, and the motion communicated from any shaft or drum, which moves at a proper velocity.

1856 S. C. Brees Terms & Rules Archit. Fast and loose pulleys, a very simple..contrivance for disengaging and re-engaging machinery, consisting of two pulleys. One pulley is fixed on an axle, another, having a bush, is loose. The band conveying the motion may consequently be shifted from one pulley to the other at pleasure.

1915 Gas Jrnl. 19 Jan. 140/1 A fast-and-loose drive from the motor pulley is by no means necessary, provided the starting gear is designed to start the motor against its full load.

2009 K. C. John Textbk. Machine Drawing (2010) xvi. 226/1 To start or stop the driven shaft of a belt-driven system, while the driving shaft is rotating continuously, a fast and loose pulley arrangement is used.

loose pulley n. ‘a pulley running loosely on the shaft, and receiving the belt from the fast pulley when the shaft is to be disconnected from the motor’ (E. H. Knight Pract. Dict. Mech.); also fast and loose pulley (see fast adj. Compounds 2).

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1825 ‘J. Nicholson’ Operative Mechanic 382 A strap passing from a drum over a fast and loose pulley.

1873 J. Richards On Arrangem. Wood-working Factories 62 Loose pulleys will give trouble now and then, no matter how well they are fitted.

单词	fast and loose pulley
释义	> as lemmas fast and loose pulley 2. Mechanics. Designating an arrangement of two pulleys on a revolving shaft which enables a machine to be engaged and disengaged; esp. in fast and loose pulley.The fast (fixed) pulley transmits power from the machine. When the machine is to be stopped, the belt switches to the loose (freely rotating) pulley. ΚΠ 1809 A. Rees Cycl. (1819) XII. at Diagonal If this engine is to be wrought by the application of any moving power, a fast and loose pulley may be placed on the axis of the cutter P, and the motion communicated from any shaft or drum, which moves at a proper velocity. 1856 S. C. Brees Terms & Rules Archit. Fast and loose pulleys, a very simple..contrivance for disengaging and re-engaging machinery, consisting of two pulleys. One pulley is fixed on an axle, another, having a bush, is loose. The band conveying the motion may consequently be shifted from one pulley to the other at pleasure. 1915 Gas Jrnl. 19 Jan. 140/1 A fast-and-loose drive from the motor pulley is by no means necessary, provided the starting gear is designed to start the motor against its full load. 2009 K. C. John Textbk. Machine Drawing (2010) xvi. 226/1 To start or stop the driven shaft of a belt-driven system, while the driving shaft is rotating continuously, a fast and loose pulley arrangement is used. extracted from fast and loosen.adj. fast and loose pulley loose pulley n. ‘a pulley running loosely on the shaft, and receiving the belt from the fast pulley when the shaft is to be disconnected from the motor’ (E. H. Knight Pract. Dict. Mech.); also fast and loose pulley (see fast adj. Compounds 2). ΚΠ 1825 ‘J. Nicholson’ Operative Mechanic 382 A strap passing from a drum over a fast and loose pulley. 1873 J. Richards On Arrangem. Wood-working Factories 62 Loose pulleys will give trouble now and then, no matter how well they are fitted. extracted from looseadj.n.²adv. < as lemmas
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> as lemmas