Edison's light bulb patent, 1880

Bildnummer 12645075
Edison's light bulb patent, 1880
Edison's light bulb patent, 1880. Printed patent drawings of the electric lamp design by US inventor Thomas Alva Edison (1847-1931). This incandescent light bulb design had been developed by Edison in November 1879. Light was produced by passing an electric current through a coiled carbon filament (bottom), which was placed inside a glass bulb (top). Although others had developed similar light bulbs, Edison's design was the first long-lasting filament. This is patent number 223, 898 from the US Patent Office, dated 27 January 1880.
Lizenzart: Lizenzpflichtig
Credit: Science Photo Library / US National Archives And Records Administration
Bildgröße: 4912 px × 7181 px
Modell-Rechte: nicht erforderlich
Eigentums-Rechte: nicht erforderlich
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