Project Gutenberg on Nostr: Using a filament of carbonized thread, Thomas Edison tests the first practical ...

Using a filament of carbonized thread, Thomas Edison tests the first practical electric incandescent light bulb (lasting 131⁄2 hours before burning out) #OTD in 1879.

Edison filed his first patent application for "Improvement in Electric Lights" on 14 October 1878. He continued to improve this design and by 4 November 1879, filed for a US patent for an electric lamp using "a carbon filament or strip coiled and connected ... to platina contact wires." via npub1kvnpp3m60derhwpqwc09zhk3ehk48tr6agc6dk9z2vggu9sga28qpxhm73 (npub1kvn…hm73)

#science #technology