| 单词 | electric eye |
| 释义 | > as lemmaselectric eye electric eye n. (a) an early form of detector of radio waves (see quot. 1891); now historical; (b) a photoelectric cell on which a beam of light is directed, the interruption of which actuates an electric relay. ΚΠ 1891 Science 10 July 24/1 In connection with resonators he exhibited what he [sc. Oliver Lodge] called a graduated electric eye, or an electric harp,..in which strips of tinfoil of different lengths are attached to a glass plate, and have spark gaps at each end which separate them from other pieces of foil. One or other of the strips would respond according to the frequency of the electro-magnetic radiation falling upon it. 1930 Electronics Aug. 216/2 ‘Electric Eye’ for Glass Industry..a photo-electric cell for determining weak spots in glass construction. 1937 Daily Express 3 Mar. 5/2 Take this ‘electric eye’, for example. We're installing it in the hotel driveway to warn people in the street whenever a car's coming out. 1966 Punch 23 Nov. 784/1 The period is obviously some time in the future..: electric eyes open the average door. 2001 S. Hong Wireless i. 8 According to William Thomson (Lord Kelvin), Hertz's resonator was an ‘electric eye’; according to Lodge, human eyes were quite similar to the coherer. < as lemmas |
| 随便看 |
|
英语词典包含1132095条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。