Edison was a famous American inventor and entrepreneur. He had more than 2,000 inventions and 1000 patents in his life. His invention of electric light, phonograph, movie camera and power system had a great influence on the world.
Contrary to popular understanding, Edison was not the inventor of electric light at first, but Edison improved it. As early as 180 1 year, a British chemist named humphry davy used platinum wire to electrify and glow in the laboratory. 18 10, he invented "electric candle &; rdquo； This is the earliest prototype of electric light. Joseph swan, another British electrical engineer, after nearly 30 years' research, made a vacuum bulb with electricity and light from carbon wire in 1878+02. The report about the swan's light bulb gave Edison a great inspiration. In June 65438+0879+1October 65438, Edison finally succeeded in making an incandescent light bulb with carbon fiber as the filament, which was called "carbon cotton filament incandescent lamp & amprdquo". Subsequently, a large number of companies were put into production, and corresponding infrastructure such as power stations and transmission networks were established, which soon made electric lamps widely used in the United States. During this period, he constantly improved his technology, and finally decided to use tungsten wire as the filament, which is the so-called "tungsten & amprdquo" and the stereotype has been used ever since, so Edison became a recognized inventor of electric light.