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Early light bulbs
Humphry Davy invented the first electric light -
Other Inventors
British scientist Warren de la Rue enclosed a coiled platinum filament in a vacuum tube and passed an electric current through it -
The ''Light Bulb"
English physicist named Joseph Wilson Swan created a ''light bulb''by enclosing carbonized paper filaments in an evacuated glass bulb -
The working prototype
Joseph Wilson Swan had a working prototype, but the lack of a good vacuum and an adequate supply of electricity resulted in a bulb whose lifetime was much too short to be considered an effective producer of light. -
The partners
A Canadian patent was filed by a Toronto medical electrician named Henry Woodward and a colleague Mathew Evans. They built their lamps with different sizes and shapes of carbon rods held between electrodes in glass cylinders filled with nitrogen. Woodward and Evans attempted to commercialize their lamp, but were unsuccessful. They eventually sold their patent to Edison in 1879 -
Better vacuums helped
Better vacuum pumps became available and Swan continued experiments on light bulbs and Swan developed a longer lasting light bulb using a treated cotton thread that also removed the problem of early bulb blackening -
When it was created
Thomas Edison invented the light bulb in the year of 1879 and began marketing the new product with Edison Electric Light Company
