layshaftn.

Brit.

/ˈleɪʃɑːft/,

/ˈleɪʃaft/, U.S.

/ˈleɪˌʃæft/

Forms: Also lay shaft, lay-shaft.

Etymology: Probably < lay v.¹ 43.

A short secondary or intermediate shaft driven by gearing from the main shaft of an engine; spec. one inside a gear-box that transmits the drive from the input shaft to the output shaft.

ΘΚΠ

society > occupation and work > equipment > machine > parts of machines > shaft > [noun] > intermediate

jackshaft1853

countershaft1864

layshaft1888

secondary shaft1888

second shaft1902

1888 Lockwood's Dict. Mech. Engin. 205 Lay shaft, a small secondary shaft, which is placed beside, or at the end of a horizontal engine, for the purpose of actuating the valves. It is driven from the crank shaft by means of bevel or spur-wheels.

1908 Westm. Gaz. 7 May 4/2 The whole of the valve mechanism being contained in a neat, hinged lay-shaft on top of the cylinder heads.

1911 G. W. Hayter Motor-car Mech. for Beginners (ed. 4) 45 For the next speed the gear wheel, B, is slid into mesh with the wheel marked C on the third or lay shaft, E.

1928 E. T. Brown New Ford Car 85 The layshaft is mounted on roller bearings.

1958 Times Rev. Industry Feb. 84/2 The engine, clutch, and layshaft are mounted on a light chassis and protected by a hinged bonnet which allows easy access to the power unit.

1959 ‘Motor’ Manual (ed. 36) iv. 73 Spaced along the layshaft are other gears, the total number being equal to the number of ratios which the gearbox can provide.

This entry has not yet been fully updated (first published 1933; most recently modified version published online March 2022).

单词	layshaft
释义	layshaftn. Brit. /ˈleɪʃɑːft/, /ˈleɪʃaft/, U.S. /ˈleɪˌʃæft/ Forms: Also lay shaft, lay-shaft. Etymology: Probably < lay v.¹ 43. A short secondary or intermediate shaft driven by gearing from the main shaft of an engine; spec. one inside a gear-box that transmits the drive from the input shaft to the output shaft. ΘΚΠ society > occupation and work > equipment > machine > parts of machines > shaft > [noun] > intermediate jackshaft1853 countershaft1864 layshaft1888 secondary shaft1888 second shaft1902 1888 Lockwood's Dict. Mech. Engin. 205 Lay shaft, a small secondary shaft, which is placed beside, or at the end of a horizontal engine, for the purpose of actuating the valves. It is driven from the crank shaft by means of bevel or spur-wheels. 1908 Westm. Gaz. 7 May 4/2 The whole of the valve mechanism being contained in a neat, hinged lay-shaft on top of the cylinder heads. 1911 G. W. Hayter Motor-car Mech. for Beginners (ed. 4) 45 For the next speed the gear wheel, B, is slid into mesh with the wheel marked C on the third or lay shaft, E. 1928 E. T. Brown New Ford Car 85 The layshaft is mounted on roller bearings. 1958 Times Rev. Industry Feb. 84/2 The engine, clutch, and layshaft are mounted on a light chassis and protected by a hinged bonnet which allows easy access to the power unit. 1959 ‘Motor’ Manual (ed. 36) iv. 73 Spaced along the layshaft are other gears, the total number being equal to the number of ratios which the gearbox can provide. This entry has not yet been fully updated (first published 1933; most recently modified version published online March 2022). < n.1888
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