A silicon-controlled rectifier (or semiconductor-controlled rectifier) is a four-layer solid state current controlling device. The name `silicon controlled rectifier` is General Electric`s trade name for a type of thyristor. The SCR was developed by a team of power engineers led by Gordon Hall and commercialized by Frank W. `Bill` Gutzwiller ...
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http://en.wikipedia.org/wiki/Silicon-controlled_rectifier
A rectifier having the ability to begin conducting at an arbitrary phase of an AC current cycle. A normal rectifier conducts for 180o of phase (Zener diodes excepted). An SCR conducts only after it has received a firing pulse, then continues to conduct until the polarity changes, so one can selectively chose to conduct on any phase F, such that 0
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http://www-bdnew.fnal.gov/operations/accgloss/gloss.html#A
(from the article `stage design`) Tube manufacturers, meanwhile, were furthering the development of the transistor, namely, the silicon-controlled rectifier, or SCR, a transistor-like ...
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http://www.britannica.com/eb/a-z/s/95
a switching device; in the on state it has low resistance and in the off state it has very high resistance.
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http://www.chemistry-dictionary.com/definition/silicon+controlled+rectifier
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