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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] In 1904 a tungsten filament was invented by Austro-Hungarians Alexander Just and Franjo Hanaman, [4] and was more efficient and longer ...
Lewis Howard Latimer (September 4, 1848 – December 11, 1928) was an American inventor and patent draftsman. His inventions included an evaporative air conditioner, an improved process for manufacturing carbon filaments for electric light bulbs, and an improved toilet system for railroad cars.
Matthew Evans is one of two Canadians who developed and patented an incandescent light bulb, on July 24, 1874, five years before Thomas Alva Edison's U.S. patent on the device. Evans, from Toronto, Ontario, and his friend Henry Woodward, made the light bulb by sending electricity through a filament made of carbon. Evans was a hotelier.
He was born in Cressona, Pennsylvania on February 26, 1858 to William Hammer (1827–1895) and Martha Augusta Beck (1827–1861). [1] [2]He became a laboratory assistant to Thomas Edison in December 1879, and assisted in the development of the incandescent light bulb. [3]
The carbon strip was in a hermetically sealed glass bulb that was filled with nitrogen gas. When electricity was applied, the internal strip developed a temperature of between 5,000 and 40,000 °F (22,200 °C). Since there was no oxygen in the glass globe the carbon filament did not burn out and produced light instead when it got hot. [21]
The pendant light at Fire Station #6 in which the bulb is installed. The Centennial Light was originally a 60-watt bulb, but has since dimmed significantly and is now as bright as a 4-watt bulb. [7] [8] [9] The hand-blown, carbon-filament common light bulb was invented by Adolphe Chaillet, a French engineer who filed a patent for this socket ...