The Story of Edison’s Invention - Electric Light
In the early 19th century, people began to use gas lamps (gas lamps), but the gas was supplied by pipelines. Once the gas leaked or was blocked, it was very easy to cause trouble. , people were very eager to reform lighting. In fact, Edison set an impossible task for himself: in addition to improving lighting, he also had to create a power supply system.
So he and Mengluoyuan's partners worked tirelessly on more than 1,600 experiments on heat-resistant materials and more than 600 kinds of plant fibers before creating the first carbon filament light bulb, which can burn for 45 hours at a time. Later, he built on this basis Continuously improving manufacturing methods, he finally launched a bamboo filament light bulb that can ignite for 1,200 hours. Extended information
Edison was the first laboratory in human history to use mass production principles and electrical engineering research to engage in inventions A person who has had a profound impact on the world through patents. His inventions of the phonograph, movie camera, and electric light had a great impact on the world. He made more than 2,000 inventions in his lifetime and held more than 1,000 patents.
Edison was ranked ninth among the 100 most influential people in the United States by the authoritative American magazine "The Atlantic Monthly".
In 1877, Edison discovered that the diaphragm in the telephone microphone would vibrate with the sound of speech, so he experimented with a short needle and got great inspiration from it. The speed of speaking can cause the short needle to vibrate in different ways. Then, in turn, this vibration must also be able to produce the original speaking sound, so he began to study the problem of sound reproduction.
On August 15, Edison asked his assistant to make a "weird machine" consisting of a large cylinder, a crank, a receiver and a diaphragm according to the drawing. After it was made, Edison took out a piece of tin foil and rolled it. On a metal cylinder engraved with spiral flutes, let one end of the needle rub against the tin foil and rotate.
The other end was connected to the receiver, and then Edison cranked the crank and sang into the receiver. Then he put the needle back in place, cranked the crank again, and then the machine played back Edison's voice. In December, Edison publicly displayed this "tinfoil cylinder phonograph", which caused a sensation around the world.
Baidu Encyclopedia-Thomas Alva Edison