| 单词 | helical gear |
| 释义 | > as lemmashelical gear Belonging to or having the form of a helix; screw-shaped; spiral. Also in combinations, as helical gear, helical tube, helical-cut adj. ΘΚΠ the world > space > shape > curvature > coil > [adjective] > spiral or helical > helical spiral1556 whelkeda1560 screwish1570 helical1613 screwed1615 cochleary1646 cochleous1694 helicoid1704 cochleateda1728 cochleate1835 helicoidal1864 society > occupation and work > equipment > machine > parts of machines > wheel > [noun] > cog or gear > with axles or teeth set at specific angle crown wheel1646 mitre wheel1825 mitre1844 skew gearinga1877 helical gear1888 spiral gear1888 skew gear1908 helical1913 spiral bevel gear1915 1613 M. Ridley Short Treat. Magneticall Bodies 27 A Helicall and Spirall vertue to move on the Cilinder of her Axis in Spirall lines. 1648 Bp. J. Wilkins Math. Magick i. ix. 57 A helicall revolution about a Cylinder. 1789 Trans. Soc. Arts (ed. 2) 1 217 The mean helical angles of Archimedean or Water Screws. 1884 F. J. Britten Watch & Clockmakers' Handbk. (new ed.) 16 For marine chronometers helical springs, in which both ends curve inwards, are universally used. 1888 Lockwood's Dict. Mech. Engin. Helical gear, toothed gear in which the wheel-teeth instead of being at right angles with their faces are set at some other angle therewith. 1904 G. F. Goodchild & C. F. Tweney Technol. & Sci. Dict. 146/1 A form of tube known as ‘helical’, which is formed from a thin steel band or ribbon, wrapped into the form of a tube and brazed at the edges. 1908 Westm. Gaz. 28 May 4/2 The live axle is chiefly noticeable for its helical-cut driving pinion. 1908 Westm. Gaz. 18 Nov. 5/1 Several of the wheels have helical-cut teeth. 1958 Which? 1 iii. 30 The new..[drill] has..helical gears, which give quieter running and longer life. < as lemmas |
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