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Original carbon-filament bulb from Thomas Edison's shop in Menlo Park. Light bulbs with a carbon filament were first demonstrated by Thomas Edison in October 1879. [1] [2] These carbon filament bulbs, the first electric light bulbs, became available commercially that same year. [3]
Cuprammonium rayon was invented in 1890. [4]Swiss chemist Matthias Eduard Schweizer (1818–1860) discovered that cellulose dissolves in tetraaminecopper dihydroxide. Max Fremery and Johann Urban developed a method to produce carbon fibers for use in light bulbs in 1897 (the factory closed in 1902). [5]
Carbon fibers or carbon fibres (alternatively CF, graphite fiber or graphite fibre) are fibers about 5 to 10 micrometers (0.00020–0.00039 in) in diameter and composed mostly of carbon atoms. [1] Carbon fibers have several advantages: high stiffness, high tensile strength, high strength to weight ratio, high chemical resistance, high ...
Max Fremery and Johann Urban developed a method to produce carbon fibers for use in light bulbs in 1897. [12] Production of cuprammonium rayon for textiles started in 1899 in the Vereinigte Glanzstoff Fabriken AG in Oberbruch (near Aachen). [citation needed] [13] Improvement by J. P. Bemberg AG in 1904 made the artificial silk a product ...
The bulb was made by hand, using a carbon filament (of greater thickness and strength than the tungsten filaments used in most modern lightbulbs) along with brass and glass components of high quality. The low wattage (originally 60 watts, now approximately four) and high nitrogen atmosphere inside the bulb have also contributed to its longevity.
Carbon filament may refer to: A carbon filament in an incandescent light bulb; Filaments in the synthesis of carbon fibre; See also. Filamentous carbon
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