Why did Edison invent the light bulb, why did Edison invent the light bulb

Reason: Due to the immaturity of the pre-basic technology of electric lamps at that time, the performance of the batteries used for power supply was poor and the voltage was low, and the vacuum technology was not developed. Not only did Swan's electric lamps have little practical value, but they also performed quite poorly, and the poor vacuum technology always caused the carbon filaments to burn out quickly.

For this reason, he has been improving his invention for 12 years. Unable to break through the bottleneck of durability, he completely abandoned experimental work in 1860.

Swan, who had stopped his work on electric light, was not idle, and he had become a well-known figure in the local academic circle. He was also promoted from assistant to partner in a photographic plate manufacturing company, and improved the collodion wet plate photography method of the time.

Swann designed a dry photographic negative that replaced the cumbersome step of preparing nitrocellulose solutions on site with nitrocellulose plastics. Fifteen years later, this technology inspired Eastman in the United States, who later founded Kodak.

Thomas Alva Edison purchased the 1875 Henry Woodward. Woodward) and Matthew Evans (Matthew. Evans) bulb patents.

And on the basis of this design, an improvement was made, and a carbonized filament was invented. Edison placed the filament in a vacuum bulb and continued to burn for an hour for the first time, and then for 40 hours.

In order to develop the light bulb, Edison often worked in the laboratory for more than ten hours a day, and he did more than 1,600 experiments on heat-resistant materials and more than 6,000 plant fibers, and finally developed a bamboo silk light bulb that could light for 1,200 hours.

The story of Edison's invention of the electric light.

At the beginning of the 19th century, people started to use gas lamps, but they were not safe and prone to accidents. Although the arc lamp was invented later, there were still many shortcomings, so Edison secretly made up his mind: "We must invent a soft electric lamp so that thousands of households can use it."

He began to study the materials of filament, from traditional carbon strips to metal ruthenium, chromium, platinum, etc., Edison experimented with more than 1,600 kinds of materials without success, in the face of people's cynicism, Edison did not give up, he firmly believed: failure is the mother of success.

In October 1879, by chance, Edison tried to put carbonized cotton thread into the bulb, after the power was turned on, the bulb emitted a golden glow, illuminating the whole laboratory, 13 months of hard work, Edison tried more than 6,000 kinds of materials, tested more than 7,000 times, and finally made a breakthrough.

The lamp was left on for 45 hours before the filament was burned. This is the first electric light with practical value in mankind. October 21, 1879 was later designated as the day of the invention of the electric light, and this day also proved that Edison's persistence was absolutely successful.

But Edison didn't stop there, he thought that 45 hours was too short, and he wanted to extend the life of the light bulb to hundreds or thousands of hours. Later, he tried to use carbonized bamboo filament as filament, and the test results showed that the effect of using bamboo filament as filament was very good, the filament was durable, and the bulb could be lit for 1200 hours. After a few decades, people changed the bamboo light bulb to a tungsten light bulb, and the life of the light bulb became longer.

Edison wanted to invent the electric light, and used more than 6,000 kinds of materials and tested more than 7,000 times, but the experiments failed again and again. After the failure, Edison, who was good at summarizing, finally developed the electric light.

At the beginning of the 19th century, people used oil lamps and candles to illuminate the light, but if you are not careful, a fire can break out. In order to liberate mankind from the constraints of night, Edison decided to make electric lights to bring light to mankind.

Edison invented the electric light and conducted more than 1,500 experiments, but he did not find a suitable material for making the filament of the electric lamp. It took 1,600 experiments with heat-resistant materials and more than 600 plant fibers to create the first carbon light bulb that could burn for 45 hours at a time. Later, he continued to improve the production method on this basis, and finally Fa Sen rolled out a bamboo light bulb that could ignite the bamboo light bulb for more than 1,200 hours, which took 30 years.

I don't think my relatives are new to the name Edison. After all, he has always been active in the textbooks of our elementary school students, studying his quotes.

Most importantly, the historical story tells us that Edison invented the light bulb.

But in fact, was the light bulb really invented by Edison?

According to historical stories, on October 21, 1879, Edison made the world's first electric light bulb in his laboratory after thousands of experiments using carbonized winding cotton thread as a filament.

This bulb emits the light of about 10 kerosene lamps, allowing people to really see the world in the dark.

So the name Edison is associated with the light bulb.

But is the story true? It's a pity that this story is just a story, not true.

In fact, as early as 1801, an English chemist named David completed the electrification of platinum wire, and 9 years later, he invented the electric candle, which uses the electric arc between two carbon rods to complete the lighting.

Of course, according to the lighting logic of the "bulb", this is not really a light bulb.

So we pulled the timeline to 1854, the American scientist Goebbels used carbonized bamboo silk and put it in a vacuum glass bottle to emit electricity. At that time, the light bulb of Goebbels' experiment could already emit light for 400 hours continuously.

It was the first real light bulb in history, but Goebbels did not patent it at the time.

In 1874, two electricians in Canada invented a technology. They filled the glass bubble with nitrogen to make the charged carbon rods glow, which was equivalent to taking Goebbels's technology one step further.

Unsurprisingly, these two men would be the first inventors of the light bulb, but unfortunately, they lacked follow-up funds at the time, that is, they had no money. Doing research itself was a super expensive thing, so they sold the technology to Edison, as we know it, in 1875.

After Edison got this technology, he began to study light bulbs, but unfortunately Edison was too slow.

Although the molding technology was obtained, in 1878, an Englishman named Wilson also completed the "light bulb powered by carbon filament in a vacuum" and immediately applied for a patent.

The following year, after thousands of researches, Edison finally discovered the material of carbonized cotton silk. He was thrilled and thought he had taken a big step forward in leading humanity to the New World.

But what he didn't know was that as early as 1860, Wilson discovered that carbonized cotton silk could be used as a filament.

In 1880, Edison again discovered that carbonized bamboo silk was better than carbonized cotton silk, but Wilson actually discovered this in 1854.

It can be seen that Wilson was actually twenty or thirty years earlier than Edison, which Edison did not know.

When he invented the electric light, he used 200 notebooks just to collect information; In order to find a suitable filament, more than 1,600 kinds of materials such as copper wire and platinum wire were used, as well as hair and various kinds of bamboo wire, and finally a kind of bamboo wire from Japan was selected, which became the original filament after burning and carbonization.

Bamboo silk lamps have been used for many years. It was not until 1906 that Edison switched to tungsten filament, which improved the quality of the bulb and continues to be used today.

When people light the electric light, they always think of this great inventor, who brings endless light to the darkness. In 1979, the United States spent millions of dollars on a year-long commemoration to commemorate the centenary of Edison's invention of the electric light.

The bulb dēngpào (English bulb), the first use is known to be Henry Goebbels in the United States. The most famous inventor is the American scientist Thomas Alvar Edison, who is known to have successfully prototyped a light bulb on October 21, 1879.

On October 21, 1879, an American inventor finally lit the world's first practical electric light through a long period of trial and error. Since then, the name of this inventor, like the electric light he invented, has entered thousands of households. He is Edison, who was praised as the "King of Invention" by later generations.

The story of Edison's invention of the electric light is as follows:

British scientists David and Faraday invented the arc lamp. This type of electric lamp uses a charcoal rod as a filament. Although it can emit bright light, the light is dazzling, consumes a lot of power, and is very impractical.

Therefore, Edison secretly decided: "We must invent a kind of electric light with soft light, so that thousands of households can use it." ”

He began to work on filament materials: from traditional carbon strips to metal ruthenium, chromium, platinum, etc., in this way, Edison experimented with more than 1,600 materials, but Edison did not back down in the face of repeated failures, he firmly believed: failure is the mother of success.

In October 1879, by chance, Edison tried to use carbonized cotton thread to put into the light bulb, after the power was turned on, the bulb made a golden yellow glow, illuminating the whole laboratory, after 13 months of hard work, tried more than 6,000 kinds of materials, tested more than 7,000 times, and finally made a breakthrough.

The lamp was left on for 45 hours before the filament was burned. This is the first electric light with practical value in mankind. Later, October 21, 1879 was designated as the day of the invention of electric light, marking the birth of the usable electric light.

But Edison was not satisfied, he wanted to prolong the life of the bulb, and then he tried to use the carbonized bamboo wire as the filament, the test results showed that the use of bamboo filament as a filament works very well, the filament is durable, and the bulb can be lit for 1200 hours. So the electric light began to be mass-produced, and after that, the electric light began to enter the homes of ordinary people.