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Anonymous users2024-02-07The lamp is a great invention of mankind to conquer the night. Before the 19th century, people used oil lamps and candles for lighting, which broke through the night, but still did not completely liberate human beings from the constraints of night. Only the birth of the generator enabled human beings to use all kinds of electric lights to brighten the world, turn night into day, expand the scope of human activities, and win more time to create wealth for society.
It was the American inventor Thomas Edison who really invented the electric light and made it shine. He was the child of a railroad worker, dropped out of primary school before finishing school, and lived selling newspapers on trains. Edison was an unusually hardworking man, and he liked to do all kinds of experiments and build many ingenious machines.
He was particularly interested in electrical appliances, and since Faraday invented the electric motor, Edison was determined to make electric light and bring light to mankind.
After carefully summarizing the failure experience of his predecessors in manufacturing electric lamps, Edison formulated a detailed test plan and conducted tests in two aspects: first, more than 1,600 different heat-resistant materials were classified and tested; The second is to improve the evacuation equipment so that the bulb has a high vacuum. He has also conducted research on new generators and circuit shunt systems.
Edison tested more than 1,600 kinds of heat-resistant luminescent materials one by one, only platinum silk has good energy, but platinum ** is surprisingly expensive, and more suitable materials must be found to replace it. In 1879, after several experiments, Edison finally decided to use charcoal filament as a filament. He sprinkled a piece of cotton silk with charcoal powder, bent it into a horseshoe shape, put it in a crucible and heated it, made a filament, put it in a light bulb, and then used an extractor to remove the air in the bulb, and the electric light was turned on, and it could be used continuously for 45 hours.
In this way, the world's first incandescent lamps of carbon filament came out. On Chinese New Year's Eve 1879, Lopac Street, the seat of the Edison Electric Light Company, was brightly lit.
In order to develop electric lights, Edison often worked more than ten hours a day in the laboratory, sometimes for several days in a row to experiment, after inventing carbon filament as filament, he successively tested more than 6,000 kinds of plant fibers, and finally selected bamboo wire, through high-temperature closed furnace coke, reprocessing, to obtain carbonized bamboo filament, installed in the bulb, once again improve the vacuum degree of the bulb, the lamp can be lit continuously for 1200 hours. The invention of the electric light caused gas** to plummet by 12% in 3 days.
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Anonymous users2024-02-06Bushnell invented the submarine.
Watts of the revelation of water vapor.
1st place: Leonardo da Vinci (Italy).
The most famous invention: the calculator.
2nd place: Nikola Tesla (USA).
The most famous invention: the radio.
3rd place: Alessandro Volt (Italy).
The most famous invention: the battery.
Meaning: Legend has it that the brush was invented by Meng Tian, a general in the Warring States period. In 223 BC, the general Meng Tian. >>>More
Franklin discovered it, and after it was followed by countless scientists, among them Nikolai. Tesla's achievements are the most significant!!
The first scientist to record resonance --- Mozi.
1. As early as the early Warring States period, people at that time invented all kinds of resonators to detect the enemy. "Mozi Beixue" records several of them: >>>More
1st place: Leonardo da Vinci (Italy) The most famous invention: the calculator.
There are a lot of them on the Internet, so you can look them up yourself.