audionn.

Brit.

/ˈɔːdɪɒn/, U.S.

/ˈɔdiɑn/,

/ˈɑdiɑn/

Origin: A borrowing from Latin, combined with an English element. Etymons: Latin audīre , -on suffix¹.

Etymology: < classical Latin audīre to hear (see audit n.) + -on suffix¹.Coined in 1906 by C. D. Babcock, assistant to the inventor, Lee De Forest.

Radio. Now historical.

An early form of triode valve, developed by Lee De Forest and used as a detector and amplifier for radio signals. Frequently attributive, as audion amplifier, audion tube, etc. De Forest discovered that a signal current flowing through a valve could be varied (modulated) by a second current through a wire placed inside the valve in the path of the signal current through it (in the original form of the audion the wire was wrapped round the outside of the glass envelope). The advantage over earlier devices was that the second current did not have to come from the tuned circuit, enabling this to operate more efficiently. It differed from the later form of the triode in that it was not capable of linear amplification.The device was patented by De Forest in U.S. Patent 824,637 (26 June 1906) and U.S. Patent 836,070 (13 Nov. 1906), but the term audion does not occur in these patents.

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

1906 L. De Forest in Trans. Amer. Inst. Electr. Engineers 25 735 (title) The Audion. A new receiver for wireless telegraphy.

1906 L. De Forest in Trans. Amer. Inst. Electr. Engineers 25 736 This early form of Audion, the flame receiver, was remarkably sensitive to weak high-frequency oscillations.

1915 E. H. Armstrong in Proc. IRE 3 215 (title) Some recent developments in the audion receiver.

1916 Chambers's Jrnl. 63/1 The audion, or wireless lamp, which plays such a part in wireless telephony between Arlington, Hawaii, California, Paris and other distant parts.

1926 Encycl. Brit. New Suppl. I. 838/1 De Forest, Lee..The most important part of his inventions was the Audion amplifier, which made possible long-distance telephony.

1939 Fortune Oct. 116B/1 In 1910 Edwin Armstrong..began tinkering with a vacuum-tube detector—a Fleming valve type, the forerunner of the De Forest audion tube.

1977 J. Monaco How to read Film vi. 353 (caption) The audion tube amplifies a signal because the grid acts as a continually varying electronic gate.

1996 Sci. Amer. (U.K. ed.) Feb. 121/2 Then, voilà..the new Movietone system from Western Electric, incorporating the amplifying power of the audion.

2004 B. Bunch & A. Hellemans Hist. Sci. & Technol. 480/4 1912..Lee De Forest develops the audion amplifier.

This entry has been updated (OED Third Edition, March 2013; most recently modified version published online December 2021).

单词	audion
释义	audionn. Brit. /ˈɔːdɪɒn/, U.S. /ˈɔdiɑn/, /ˈɑdiɑn/ Origin: A borrowing from Latin, combined with an English element. Etymons: Latin audīre , -on suffix¹. Etymology: < classical Latin audīre to hear (see audit n.) + -on suffix¹.Coined in 1906 by C. D. Babcock, assistant to the inventor, Lee De Forest. Radio. Now historical. An early form of triode valve, developed by Lee De Forest and used as a detector and amplifier for radio signals. Frequently attributive, as audion amplifier, audion tube, etc. De Forest discovered that a signal current flowing through a valve could be varied (modulated) by a second current through a wire placed inside the valve in the path of the signal current through it (in the original form of the audion the wire was wrapped round the outside of the glass envelope). The advantage over earlier devices was that the second current did not have to come from the tuned circuit, enabling this to operate more efficiently. It differed from the later form of the triode in that it was not capable of linear amplification.The device was patented by De Forest in U.S. Patent 824,637 (26 June 1906) and U.S. Patent 836,070 (13 Nov. 1906), but the term audion does not occur in these patents. 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 1906 L. De Forest in Trans. Amer. Inst. Electr. Engineers 25 735 (title) The Audion. A new receiver for wireless telegraphy. 1906 L. De Forest in Trans. Amer. Inst. Electr. Engineers 25 736 This early form of Audion, the flame receiver, was remarkably sensitive to weak high-frequency oscillations. 1915 E. H. Armstrong in Proc. IRE 3 215 (title) Some recent developments in the audion receiver. 1916 Chambers's Jrnl. 63/1 The audion, or wireless lamp, which plays such a part in wireless telephony between Arlington, Hawaii, California, Paris and other distant parts. 1926 Encycl. Brit. New Suppl. I. 838/1 De Forest, Lee..The most important part of his inventions was the Audion amplifier, which made possible long-distance telephony. 1939 Fortune Oct. 116B/1 In 1910 Edwin Armstrong..began tinkering with a vacuum-tube detector—a Fleming valve type, the forerunner of the De Forest audion tube. 1977 J. Monaco How to read Film vi. 353 (caption) The audion tube amplifies a signal because the grid acts as a continually varying electronic gate. 1996 Sci. Amer. (U.K. ed.) Feb. 121/2 Then, voilà..the new Movietone system from Western Electric, incorporating the amplifying power of the audion. 2004 B. Bunch & A. Hellemans Hist. Sci. & Technol. 480/4 1912..Lee De Forest develops the audion amplifier. This entry has been updated (OED Third Edition, March 2013; most recently modified version published online December 2021). < n.1906
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