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A halogen lamp (also called tungsten halogen, quartz-halogen, and quartz iodine lamp) is an incandescent lamp consisting of a tungsten filament sealed in a compact transparent envelope that is filled with a mixture of an inert gas and a small amount of a halogen, such as iodine or bromine.
1890s: He invented a few types of filament lamps with metallic filaments; some say he was the first scientist to use a tungsten filament. He got a patent for lamps with tungsten filaments (US Patent No. 575,002 Illuminant for Incandescent Lamps, Application on 4 January 1893) [1] and sold it to General Electric (1906), [citation needed] who ...
Lodygin later sold the patent rights to GE. In 1902, Siemens developed a tantalum lamp filament that was more efficient than even graphitized carbon filaments since they could operate at higher temperature. Since tantalum metal has a lower resistivity than carbon, the tantalum lamp filament was quite long and required multiple internal supports.
Canadian Patent application. Henry Woodward was a Canadian inventor and a major pioneer in the development of the incandescent lamp. [1] He was born in 1832. On July 24, 1874, Woodward and his partner, Mathew Evans, a hotel keeper, filed a Canadian patent application on an electric light bulb.
1921 Junichi Miura creates the first incandescent lightbulb to utilize a coiled coil filament. 1925 Marvin Pipkin invents the first internal frosted lightbulb. 1926 Edmund Germer patents the modern fluorescent lamp. 1927 Oleg Losev creates the first LED (light-emitting diode). 1953 Elmer Fridrich invents the halogen lamp. [14]
Alexander Just A Just–Hanaman light-bulb, Budapest, 1906 Alexander Just as a soldier during World War I. Alexander Friedrich Just (12 April 1874, in Bremen – 30 May 1937, in Budapest) was an Austro-Hungarian [1] chemist and inventor. [2]