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Incandescent Filament Lamp

Incandescent Filament Lamp. Joseph Swan (1847) Patent By J. W. Starr (1845) “The application of continuous metallic and carbon conductors, intensely heated by the passage of a current of electricity, to the purpose of illumination” Thin Sheet Of Platinum Foil Torricellian Vacuum

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Incandescent Filament Lamp

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  1. Incandescent Filament Lamp • Joseph Swan (1847) • Patent By J. W. Starr (1845) • “The application of continuous metallic and carbon conductors, intensely heated by the passage of a current of electricity, to the purpose of illumination” • Thin Sheet Of Platinum Foil • Torricellian Vacuum • Disliked The Use Of A Platinum Filament • Carbon Filament In A Vacuum Appealed To Him • Incandescent Strip Of Carbon - 0.2” Wide, 1.5” Long

  2. Incandescent Filament Lamp • Joseph Swan • Publicly Displayed • December 18, 1878 • Not In Operation • Never Patented Idea • Though Idea Was Anticipated & thus, Not Patentable • Carbon Filament

  3. Incandescent Filament Lamp • Joseph Swan • First Successful Filament Lamp (1881) • Carbon Filament • Thickened Filament Ends • Evacuated Glass Bulb • Platinum Filament Supports • Glass Supports For Filament Holders • Platinum End Wires • Exhausting “Pip” • Applied For Patent • November 27, 1880

  4. Incandescent Filament Lamp • Thomas Alva Edison (1847-1931) • Initially • Lamp Filaments From Carbon Impossible • Thought He Was Successful With Platinum • Switched To Carbon (1879) • Successful February, 1880 • Applied For Patent ???????? • Developed Ideas For Commercializtion • Joined With Swan To Form • Ediswan Electric Co.

  5. Incandescent Filament Lamp • Edison Carbon Filament Lamp (1881) • Edison Carbon Filament Lamp (1882) • Edison Lamp Cluster (1884)

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