Date | Text | |
---|---|---|
19 May 1896
Carborundum furnace |
Carborundum furnace In 1896, Edward G. Acheson was issued a U.S. patent for an electric furnace used to produce carborundum (silicon carbide), one of the hardest industrial substances (No. 560,291). The furnace used an electric current passed through a core of carbon rods to produce a strong heating effect resulting from their resistance. |