barrettern.
/bəˈrɛtə/ 1. An early device for detecting radio waves by means of the change in resistance in a metal filament.
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society > communication > telecommunication > radio communications > radio equipment > [noun] > radio set > receiver > parts of
coherer1894
radioconductor1897
barretter1903
cat's whisker1915
dial1922
radio dial1922
chassis1931
front end1938
1903 R. A. Fessenden U.S. Patent 727,331 The hot-wire receiver described..which has been termed a ‘barretter’.
1905 Trans. Internat. Electr. Congress III. 417 The device selected [as a detector for wireless reception]..was the ‘solid barretter’... This consists of a minute loop of very fine platinum wire or filament.
1923 E. W. Marchant Radio Telegr. iv. 44 Other forms of detector for wireless circuits are the electrolytic, the hot wire ‘barretter’ and the crystal.
1935 Wireless World 15 Nov. 522/1 A barretter is a device in which the resistance varies according to the current.
2. A modern adaptation used to stabilize an electrical current.
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the world > matter > physics > electromagnetic radiation > electricity > electric current > [noun] > stabilizing device
barretter1940
1940 Chambers's Techn. Dict. 77/2 Barretter, an iron wire resistance mounted in a glass bulb containing hydrogen, and having a temperature coefficient so arranged that the variation of resistance produced ensures that the current in the circuit to which it is connected remains constant over a wide range of voltage.
1942 Electronic Engin. 15 36 The filament heating of the master oscillator is stabilised by a barretter which also contributes to frequency stability.
1943 Electronic Engin. 15 384 The barretter tube, which although fundamentally a current stabiliser does not actually regulate the voltage.
This entry has not yet been fully updated (first published 1972; most recently modified version published online December 2019).
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n.1903