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Sir Humphry Davy discovered platinum filaments.
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Davy created the first electric carbon arc lamp.
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Warren De la Rue created a lamp that worked but was to expensive for wide-spread use.
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Edward Shepard invented an electrical incandescent arc lamp using a charcoal filament.
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German Henricg Globel created the first true light bulb –used a carbonized bamboo filament inside a glass bulb.
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Herman Sprengel invented the mercury vacuum pump –Made it possible to get a good vacuum inside a bulb.
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Henry Woodward and Matthew Evans patented a light bulb.
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Sir Joseph Wilson Swan invented a light bulb that lasted for 13.5 hrs. –used a carbonized cotton filament.
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Thomas Alva Edison invented a light bulb that burned for 40 hrs. –placed filament in an oxygen-less bulb. –His ideas were based on the 1875 patent he purchased from Henry Woodward and Matthew Evans.
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Edison continued to improved his light bulb until it could last for over 1,200 hours –Used a bamboo-derived filament.
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Willis Whitnew invented a filament that would not make the inside of a light bulb turn dark. –Used a metal-coated carbon filament
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The General Electric Company patented the use of tungsten filaments for use in light bulbs. –These filaments were expensive.
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William David Coolidge invented an improved method of making tungsten filaments. –outlasted other types of filaments –made costs practical.
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The first frosted light bulbs were produced.
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Philips Company invented a light bulb that lasts 60,000 hours.