单词 | double gear |
释义 | > as lemmasdouble gear b. Wheels working one upon another, by means of teeth, or otherwise. a train of gears: a set of such wheels. Often preceded by some defining word, as bevel-, crown-, spur-gear (see the first element). double gear (see quot. 1874). ΘΚΠ society > occupation and work > equipment > machine > parts of machines > wheel > [noun] > cog or gear cog-wheel1416 main wheel1678 spur-wheel1731 rack wheel1772 spur gear1808 gear1829 gearing1833 spur gearing1844 pitch wheel1854 tooth-wheel1862 gear-wheel1874 maintaining wheel1874 cog1883 1829 Nat. Philos. (Libr. Useful Knowl.) I. Mechanics ii. vii. §70. 30 Wheels are denominated spur, crown, or bevel gear, according to the position or direction of the teeth. 1874 E. H. Knight Amer. Mech. Dict. I. 726/1 Double-gear, the nests of variable-speed gear-wheels in the head-stock of a lathe. 1881 Metal World No. 22. 340 The moving of the car sets in motion a train of gears, which in turn gives motion to the pencil mechanism, which traverses crosswise of the paper, while the paper itself traverses from the pencil lengthwise at a uniform speed. < as lemmas |
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