1879, Edison began to study electric lights. He believes that the key to prolong the life of incandescent lamps is to improve the vacuum degree of bulbs and use heat-resistant materials with low power consumption, strong luminescence and low price as filaments. Edison tried 1600 kinds of heat-resistant materials successively, and the results were not satisfactory.
1879, 10, 2 1 in the evening, Edison made a carbon fiber (carbon filament) incandescent lamp and sent the electric light source into the home for the first time.
Edison used carbonized cotton thread as filament, put it in a glass ball, and then started the air compressor to vacuum the glass ball.
Results The light emitted by carbonized cotton thread was bright and stable, and it was completely lit for more than 10 hour (45 hours).
In this way, the carbonized cotton filament incandescent lamp was born, and Edison obtained a patent for it.
Since then, Edison has been working on the improvement of incandescent lamps. In order to improve the quality of light bulbs and prolong their life, Edison tried his best to find suitable materials for filament.
During Edison's development of filament materials for incandescent bulbs, cotton thread, thin strips of wood, straw, gauze paper, thread, Manila hemp rope, horse hair, fishing line, chestnuts, hard rubber, cork, rattan, corn fiber and even human beard and hair were tested.
1880, Edison developed a carbonized bamboo filament lamp, which greatly prolonged the filament life. In the same year 10, Edison set up his own factory in New Jersey and started mass production, which was the earliest commercial incandescent lamp in the world.
1880 In early May, Edison tried about 6,000 kinds of plant fiber materials.
For a long time, Edison sent many people around the world to find bamboo suitable for filament.
During the nine years from 65438 to 0908, Japanese bamboo has been the main raw material for supplying carbon fiber.
Extended data:
The invention of incandescent lamp is usually attributed to Edison (a famous American inventor and entrepreneur) in the United States, and to Swan (a British physicist, chemist and inventor) in Britain.
1878 18 February 18, Swan successfully trial-produced the first incandescent light bulb.
1879 Edison obtained a patent for the invention of carbonized cotton filament incandescent lamp.
1880, Swan applied for the patent of incandescent lamp.
The competition between the two inventors is so fierce that patent disputes are almost inevitable.