| 单词 | roller chain |
| 释义 | > as lemmasroller chain roller chain n. a drive chain with small rollers in each link for running on sprockets, now found esp. on bicycles.In modern roller chains the roller encloses a bush which contains the pin joining the plates on opposite sides of the chain. Being free to rotate as the chain passes over the sprockets, it ensures considerably less friction.In quot. 1829: a chain attached to a roller. ΚΠ 1829 Repertory Patent Inventions 7 242 The hook of the roller chain being fastened to a ring that traverses from one end to the other of this horizontal bar, will, when the roller is put in motion, be drawn..to that end of the boat which is next the bank.] 1841 Prize-ess. & Trans. Highland & Agric. Soc. Scotl. 13 54 [A threshing machine.] AA represent the position and arrangement of the feeding rollers,..O the roller-chain, P the upper pulley. 1863 U.S. Patent 40,683 1/1 Looms in which an endless roller chain is used for determining what warp-threads shall be lifted and depressed. 1939 Pop. Mech. Aug. 313 Periodic cleaning and greasing of roller-chain drives on bicycles, scooters and motorcycles practically doubles the life of the chain. 2002 P. Miles Robot Sumo vi. 101 With roller chains, there is an ANSI number that is more commonly used to specify the chain. < as lemmas |
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