Detailed timetable:
1878, Edison claimed to have solved the problem of electric lighting. In the same year, 10 year 10 5, a patent application for platinum wire "electric lamp" was filed. However, platinum is too expensive to be popularized. Edison began to experiment with filaments of other materials and officially announced 1600 kinds of materials.
1879101October 2 1 day invented a high-resistance incandescent lamp, which was continuously lit for 40 hours. So 165438+ 10/month 1 applied for the patent of carbon filament lamp.
65438+February 2 1 new york Express reported Edison's incandescent lamp. 65438+On February 25th, 2008, 3000 tourists from new york watched a public electric light show in Menlo Park.
1880 Edison applied for a patent for electric light invention, and1October 28th 65438+ put forward a patent for "power transmission and distribution system". /kloc-in February of 0/8, Scripps published the article "Edison's electric light" and officially published the invention of electric light. In May, the first "Columbia" ship illuminated by electric lights made a successful trial. New york Edison Electric Lighting Company was established in February of that year.
After Edison, 1909, American Ke Renqi invented tungsten wire instead of carbon wire, which greatly improved the efficiency of electric lamp. Since then, electric lights have leapt to a new level, and fluorescent lamps, iodine tungsten lamp and other lights have mushroomed on the lighting stage.