magnetronn.

Brit.

/ˈmaɡnᵻtrɒn/, U.S.

/ˈmæɡnətrɑn/

Origin: Formed within English, by derivation. Etymons: magnetic adj., -tron suffix.

Etymology: < magne- (in magnetic adj.) + -tron suffix. Compare French magnétron (dated 1921 in Robert Dict. alphabétique et analogique (1986)).

Electronics.

A diode with a cylindrical anode surrounding a coaxial cathode in which the flow of current is controlled by a magnetic field applied parallel to the axis, and now usually designed to produce microwaves.

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

1921 Electr. World 28 May 1263/2 Dr. Hull described the new vacuum tube, which is called ‘magnetron’ because the valve control is accomplished by means of a magnetic field.

1921 Jrnl. Amer. Inst. Electr. Engineers 40 532/1 Dr. Albert Hull, of the Research Deparment of the General Electric Co.,..delivered a lecture on ‘The Magnetron—A New Electric Valve’.

1921 A. W. Hull in Jrnl. Amer. Inst. Electr. Engineers 40 715/1 ‘Magnetron’ is a Greeko-Schenectady name, as Mr. Lee DeForest calls it, for a vacuum electric device which is controlled by magnetic field.

1924 Sci. Monthly 18 650 As the negatively charged grid cuts off the current of the three-element tube, so an external magnetic field will also do it in the two-element tube... Such a device, called a magnetron, was shown.

1945 Times 15 Aug. 2/1 In July 1940, Professor J. T. Randall, of Birmingham, produced a magnetron which was the first high-power generator of centimetric waves in the world. The magnetron remains the heart of every modern Radar equipment.

1958 Engineering 7 Feb. 174/3 The machine [sc. a linear accelerator] is of the travelling-wave type, using radio-frequency power generated by a magnetron valve operating at a frequency of 3,000 Mc/s.

1971 New Scientist 1 Apr. 36/1 Outred is developing microwave cavity sources using very high-powered (kilowatts) magnetrons for the infrared spectroscopy programme.

1990 Hindu 26 Jan. 17/4 A magnetron produces the microwaves that act upon the moisture in the food.

This entry has been updated (OED Third Edition, March 2000; most recently modified version published online March 2022).

单词	magnetron
释义	magnetronn. Brit. /ˈmaɡnᵻtrɒn/, U.S. /ˈmæɡnətrɑn/ Origin: Formed within English, by derivation. Etymons: magnetic adj., -tron suffix. Etymology: < magne- (in magnetic adj.) + -tron suffix. Compare French magnétron (dated 1921 in Robert Dict. alphabétique et analogique (1986)). Electronics. A diode with a cylindrical anode surrounding a coaxial cathode in which the flow of current is controlled by a magnetic field applied parallel to the axis, and now usually designed to produce microwaves. 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 1921 Electr. World 28 May 1263/2 Dr. Hull described the new vacuum tube, which is called ‘magnetron’ because the valve control is accomplished by means of a magnetic field. 1921 Jrnl. Amer. Inst. Electr. Engineers 40 532/1 Dr. Albert Hull, of the Research Deparment of the General Electric Co.,..delivered a lecture on ‘The Magnetron—A New Electric Valve’. 1921 A. W. Hull in Jrnl. Amer. Inst. Electr. Engineers 40 715/1 ‘Magnetron’ is a Greeko-Schenectady name, as Mr. Lee DeForest calls it, for a vacuum electric device which is controlled by magnetic field. 1924 Sci. Monthly 18 650 As the negatively charged grid cuts off the current of the three-element tube, so an external magnetic field will also do it in the two-element tube... Such a device, called a magnetron, was shown. 1945 Times 15 Aug. 2/1 In July 1940, Professor J. T. Randall, of Birmingham, produced a magnetron which was the first high-power generator of centimetric waves in the world. The magnetron remains the heart of every modern Radar equipment. 1958 Engineering 7 Feb. 174/3 The machine [sc. a linear accelerator] is of the travelling-wave type, using radio-frequency power generated by a magnetron valve operating at a frequency of 3,000 Mc/s. 1971 New Scientist 1 Apr. 36/1 Outred is developing microwave cavity sources using very high-powered (kilowatts) magnetrons for the infrared spectroscopy programme. 1990 Hindu 26 Jan. 17/4 A magnetron produces the microwaves that act upon the moisture in the food. This entry has been updated (OED Third Edition, March 2000; most recently modified version published online March 2022). < n.1921
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