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connected to wire terminals. A current is applied to the filament, heating it. Edison found when he connected an ammeter between the filament and the auxiliary electrode, a current would flow, passing through the evacuated space of the bulb from filament to electrode. This current was later found
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129:(the Edison Effect) in 1884. It consists of an Edison incandescent lamp - an evacuated glass bulb with a hairpin shaped bamboo carbon
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occurred prior to
January 1, 1929, and if not then due to lack of notice or renewal. See
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technology, which dominated electronics for 50 years, until the 1970s.
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170:The Edison Effect and its Modern Applications
133:- with an additional platinum foil electrode
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