Construct · 1 fields · 1 citations
One name. One construct. A landmark on the map.
● anchor · a standalone construct Nearest construct by meaningchambercompare the meaningsEvery construct on the map is compared with every other by the meaning of its definitions, and the closest one is surfaced here. The nearest construct to valve is chamber.
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A single standalone construct; nearby constructs are located against it in the Collider. Tap a field for its definition, unit, and measures.
The British name for a vacuum tube: a sealed glass envelope in which a heated cathode emits electrons that cross a vacuum to an anode, so the device passes current one way and, with a control grid added, can amplify or switch a signal. Fleming's 1905 paper On the conversion of electric oscillations into continuous currents by means of a vacuum valve introduced the two-electrode valve that rectifies a signal, and the name stuck because, like a one-way water valve, it lets current pass in only one direction. These valves were the active parts of early radios and computers before the transistor replaced them. The referent is an electronic component that controls electric current in a vacuum, not a flap of tissue in the heart, a fitting that throttles fluid in a pipe, or a mechanism on a brass instrument.[1]
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