| 单词 | sun valve |
| 释义 | > as lemmassun valve sun valve n. now historical an automatic device activated by the heat of the sun, serving to control the operation of the light of a lighthouse, beacon, etc. ΘΚΠ society > travel > travel by water > vessel, ship, or boat > buoys, marks, or lighthouses > [noun] > object on land or sea as guide > light beacon or lighthouse > valve activating sun valve1908 1908 Master, Mate & Pilot Dec. 255/2 By the adoption of the sun valve, it is possible to make a further saving of from 30 to 40 per cent, without the necessity of keeping an attendant to light the signal at sunset and shut it off at sunrise. 1936 W. H. McCormick Mod. Bk. Lighthouses xi. 92 The light is automatically turned on and off..by placing the light in charge of an ‘AGA’ Sunvalve. 2014 Proc. IEEE 102 1390/2 In 1907, he [sc. Dalén] designed what has been considered his most famous invention: the sun valve. < as lemmas |
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