| 单词 | rack lever |
| 释义 | > as lemmasrack lever rack lever n. Watchmaking and Clockmaking (now historical) (in early forms of lever escapement) a lever terminating in a rack by means of which the movement is effected; (also) = lever escapement n. at lever n.1 Compounds 2. ΚΠ 1850 E. B. Denison Rudimentary Treat. Clock & Watch Making 147 This was the rack-lever movement. 1962 E. Bruton Dict. Clocks & Watches (1963) 139 Rack Lever, a transitional lever escapement before Mudge's detached lever. 1984 Times Lit. Suppl. 6 Apr. 359/4 He has a sound knowledge of the craft and mechanisms of the later period: detents, cylinders, rack levers and grasshoppers. < as lemmas |
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