| 单词 | electron tube |
| 释义 | > as lemmaselectron tube electron tube n. a vacuum tube containing two or more electrodes, such that a current can flow in a controlled way between them; spec. a thermionic valve (= tube n. 2g(b)); (also) a gas-filled tube in which an electric discharge takes place.For the spec. sense, valve is the usual term in British English, and tube in American English. ΘΚΠ the world > matter > physics > electromagnetic radiation > electronics > electronic devices or components > thermionic valve > [noun] > vacuum tube or thermionic valve vacuum tube1859 trigger tube1894 audion1906 pliotron1915 diode1919 electron tube1919 negatron1919 pentode1919 power valve1919 tetrode1919 triode valve1919 magnetron1921 bright emitter1923 peanut valve1923 peanut1924 power tube1924 multiple valve1929 thyratron1929 heptode1932 hexode1933 pentagrid1933 acorn tube1934 octode1934 triode-pentode1936 triode-hexode1937 transitron1939 trochotron1947 steering diode1957 1919 Science 21 Nov. 478/1 ‘Theory of action of electron tubes as amplifiers,’ John M. Miller, Bureau of Standards. 1930 Electronics Apr. 25/2 The electron-tube control of the stage lighting in the..Chicago Civic Opera House. 1964 L. H. Van Vlack Elements Materials Sci. (ed. 2) 409 (Gloss.) Transistor , an electrical device utilizing semiconductors and performing some of the functions of electron tubes. 1996 E. Sridharan Polit. Econ. Industr. Promotion ii. 28 Electron tubes can be of many types, the best known being the TV picture tube. electron tube g. Electronics. A sealed container, evacuated or gas-filled, containing two or more electrodes between which an electric current can be made to flow; spec. (a) a cathode-ray tube; (b) (chiefly U.S.) a thermionic valve. Frequently in combination with preceding noun, as discharge tube, electron tube, picture tube, vacuum tube. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > discharge of electricity > [noun] > container tube1859 Geissler tube1863 Crookes's tube1884 oscilloscope1915 the world > matter > physics > electromagnetic radiation > electronics > electronic devices or components > thermionic valve > [noun] tube1859 valve1905 thermionic valve1909 bottle1940 the world > matter > physics > electromagnetic radiation > electronics > electronic devices or components > thermionic valve > [noun] > vacuum tube or thermionic valve vacuum tube1859 trigger tube1894 audion1906 pliotron1915 diode1919 electron tube1919 negatron1919 pentode1919 power valve1919 tetrode1919 triode valve1919 magnetron1921 bright emitter1923 peanut valve1923 peanut1924 power tube1924 multiple valve1929 thyratron1929 heptode1932 hexode1933 pentagrid1933 acorn tube1934 octode1934 triode-pentode1936 triode-hexode1937 transitron1939 trochotron1947 steering diode1957 the world > matter > physics > electromagnetic radiation > electronics > electronic devices or components > cathode-ray tube > [noun] cathode-ray tube1905 tube1905 1859 Philos. Trans. (Royal Soc.) 148 15 The direct discharge is that which is visible when taken from two wires hermetically sealed in a vacuum tube. 1898 London, Edinb. & Dublin Philos. Mag. 5th Ser. 46 296 Hertz made the rays travel between two parallel plates of metal placed inside the discharge-tube. 1905 Electrician 16 June 335/1 The phosphorescent spot on the screen of the tube follows strictly any changes which occur in the strength of the field. 1915 Electrician 21 May 241/2 In the X-ray tube..the space charge effects are very much exaggerated. 1922 C. W. Taussig Bk. Radio ix. 111 The tubes used are 5 watt transmitting tubes. 1940 H. M. Watson et al. Understanding Radio v. 223 As you experiment with this one-tube set, you will hear many stations faintly. 1947 R. Lee Electronic Transformers & Circuits i. 3 The limitations which inhere in transformers often influence the choice of amplifier tubes. 1973 G. J. King Newnes Colour Television Servicing Man. I. i. 29/2 The output direct from the tripler is too high an impedance to accommodate the normal beam current swings of the tube without serious voltage fluctuations. 1981 L. Nashelsky & R. L. Boylestad Devices iv. 128 Production rose from about 1 million tubes in 1922 to about 100 million in 1937. < as lemmas |
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