Mark. Twain, dressed in his usual white suit and black bow tie, stood on the platform and kept bouncing up and down, humming and chirping like a wild bee. Pen ~ fun ~ pavilion www.biquge.info he was so happy that he couldn't help dancing and shouting, causing the audience standing aside to laugh.

After a while, Tesla said, "Okay, Mark, let's come down when you've had enough." ”

"It's early!" The humorist said, "This thing makes me happy!" ”

"It's not a joke, you'd better come down." Tesla persuaded him: "Listen to me, you'd better come down." ”

Mark. Twain just laughed: "You don't want to lift me away with a big crane!" ”

As he spoke, he suddenly turned pale, staggered to the edge of the platform, and waved his arms wildly to ask Tesla to turn off the machine.

"Quick, Tesla, get a hand!"

Tesla smiled and put Mark. Twain helped him off the platform and carried him towards the break room. Tesla and his assistants are well aware of the violentness of the vibration.

No customer wants to taste the taste of Tesla standing on the high-voltage platform for testing. They really didn't dare. But they were clamoring for Tesla to talk about why he wouldn't electrocut.

Tesla explained that as long as the frequency is high, the high-voltage alternating current only passes through the outer surface of the skin in large quantities and does not cause damage. But he cautioned those who are not good at it not to be a child's play. A few amperes of electric current flow through the skin can be endured for a short time without danger, but a few milliamperes of electric current entering the nerve tissue can be fatal. If there is a very low current under the skin, whether it is alternating current or direct current, it can immediately electrocute a person.

The morning light was hazy, and Tesla finally broke up with the guest. However, the lights in his lab remained on for another hour before he locked the door and walked back to the hotel for a short rest.

Somehow, Tesla always had a feeling that something important was going to happen today.

Tesla's senses have always been unusually acute. Several times during his childhood, he was awakened by the crackling sound of flames at night, thus saving his neighbors from the burning house. When he was doing lightning research in Colorado, he himself could hear thunder 550 miles away, while his young assistant could only hear 150 miles at most.

But his performance during the breakdown was staggering even by Tesla's own standards. He could hear the ticking of his watch from three rooms; A fly landing on the table in his room would cause a roar in his ears; The carriage drove by miles away, and it shook his whole body; The train whistled twenty miles away, causing him to feel the chair under his ass shake violently, and the pain was unbearable. The ground beneath his feet was constantly shaking. In order to get a rest, he needs to put a rubber cushion under the bed.

He once wrote in his diary: "The roaring sound from far and near often creates a sound effect of someone speaking, and if I can't distinguish the original sound, it is really too creepy." If the sunlight was intermittently blocked, it would have struck me so hard in the head that I fainted. When I pass under bridges or other structures, I have to use all my perseverance, because then I feel like my head is going to be crushed. In the darkness, I had the sceptibility of bats, and with a peculiar horror sensation on my forehead, I could tell what was twelve feet away. ”

During this time, his pulse fluctuated dramatically, at times extremely slow, and at high speeds it could reach 260 beats per minute. The muscles in his body twitched and trembled incessantly, which in itself was an almost unbearable burden.

Tesla wrote: "I regret for the rest of my life that there were no physiology and psychology experts observing me at the time. I longed for life, but I could no longer count on getting back to health. ”

Not only did he regain his health, but thanks to the help of a loyal friend, he soon gained more energy than ever. That friend was Anital. Sigdi, a highly skilled mechanic who often works with Tesla, is an athlete. Sigdi persuaded him to take care of exercise, and the two of them often went on long walks around the city during this period.

Tesla never stopped thinking about that unsatisfactory DC motor problem. He didn't think about it simply because he wanted to succeed. "For me, it's a sacred vow, a matter of life and death. I knew that if I failed, I would be crushed. ”

But in fact he already felt that he had won the battle. "I have the answer in the back of my mind, but I can't express it yet."

I remember that afternoon, when the sun was about to set, Tesla and Sigdi were walking in the park in the city. Tesla was reciting Goethe's Faust, and the setting sun reminded him of a glorious verse: "The light fades with the day's toil, and it rushes to the distance in search of a new state of life; Oh, if only I put on my wings and leave the earth, and fly with this light, and fly! And so, "thoughts sprung up like a bolt of lightning, and in an instant the truth was revealed before them." ”

Tesla's long arms, which were waving, suddenly stopped in mid-air, as if he couldn't move because of a sudden spasm. Sigdi was startled and hurriedly helped him to the bench. But Tesla refused to sit down, but was busy looking for branches. When he found the branch, he drew a picture on the ground.

He excitedly shouted, "Look at my motor, I'm going to make it turn the other way around!" ”

Six years later, Tesla presented a presentation to the Institute of Electrical Engineers (IEEE) proposing a concise yet practical new scientific principle, and published the diagram. As a result of the popularization and application of this scientific principle, a veritable revolution has taken place in the entire technological world.

What he came up with was not a new electric motor, but a completely new system, because Tesla came up with the principle of two or more alternating currents that are not synchronized with each other to produce a rotating magnetic field. In fact, he created a magnetic swirl of asynchronous currents, so that rectifiers (devices that commutate currents) and brushes that provide pathways for currents are unnecessary.

Other scientists have always wanted to invent the AC motor, but they only use a single circuit, which is no different from direct current. The result is either no rotation or bad rotation, causing a large amount of reactive vibration. Erihu, who once built a generator in the United States. Thomson, as early as 9078-9079, used alternating current to power arc lamps. In Europe, Gorard and Gibbs first made an AC transformer, which is an indispensable device for increasing or decreasing the voltage in the process of power transmission. George. Westinghouse was an early advocate of the grand plan to electrify the United States using alternating current, and he was determined to buy the rights to the U.S. invention patents of Gorard and Gibbs.

Despite the efforts of so many people, no one actually succeeded in building an AC electric motor, and in the end, Tesla did just that. He invented an induction motor, the heart of a new system, a leap ahead of his time.

Of course, it's one thing to make a great invention and another thing to make it known. Tesla began to think a little about it, thinking that now he should gain fame and fortune. It's no wonder that his salary is very meagre, barely enough to make ends meet. He once said with unspeakable bitterness: "The last twenty-nine days of the month are the hardest." But now he feels that life is no big deal, because he knows that he can finally call himself an inventor.

"That's what I want," he said, "and Archimedes is my ideal." I admire the work of artists, but I think that art is just a shadow and a façade. And what about inventors -- I think the things they create for the world are tangible, tangible, real, and effective. ”

In the days that followed, he was completely immersed in the ecstasy of inventing all kinds of new AC motors.

He wrote; "I have never enjoyed such joy and happiness in my life. Thoughts flowed up in my heart like a spring, and the only difficulty was how quickly to hold on to them. ”

"The devices I came up with seemed to me to be real, and I knew every detail so well that even the tiniest signs of wear could not escape my eyes. I imagined with joy that the motor was spinning and turning...... When a natural hobby develops into a strong desire, a person will rush towards his purpose at an astonishing speed. In fact, in less than two months, I have developed several types of motors and several new styles of ...... for a complete system. ”

He came up with a wide variety of practical AC motors, such as multiphase induction motors, split-phase induction motors, and multiphase synchronous motors, as well as a complete system of multiphase and single-phase motors that generated, transmitted, and used current.

Indeed, all the electricity in the world was generated, transmitted, distributed, and converted into mechanical power through the "Tesla Multiphase System".

Thanks to the Tesla system, it is possible to obtain a much higher voltage than direct current, which allows power to be delivered hundreds of miles away. It heralds the dawn of a new era filled with light and power everywhere.

But right now, Tesla can't see the future clearly.

By 9082, the idea of Tesla's electric motor was still churning in my head. But he had no money and no time to build a prototype of an electric motor.

Later, with the help of two brothers named Puskas, he was recommended to work at the Edison telephone branch in Paris, and he took up his post in the autumn of 9082.

He was enthusiastic about reaching out to the managers of the continental Edison company and convincing them of the huge potential benefits of alternating current. But they later replied that Edison was disgusted when he heard the question raised, much to the disappointment of the young Serb.

The young age and the presence in Paris provided him with good opportunities to refresh himself – opportunities that he did not pass up. He made new friends, both American and French, and he returned to his old job of playing marble, walking miles a day and swimming in the Seine.

He was assigned to overhaul machinery and equipment, and he was responsible for any problems at the Edison power plants in France and Germany. On one occasion he was sent to Germany on a mission for the company, taking with him all kinds of materials, and there he built his first practical AC induction motor, "a crude device, but it gave me the first glimpse of the rotation caused by alternating current instead of a rectifier, and it satisfied me." ”

In the summer of 9083, he repeated the trial twice with the help of an assistant. The advantages of alternating current over Edison's direct current seemed so obvious to him that he could not expect anyone to turn a blind eye to them.

Someone came to Tesla and asked him to see how to deal with the lighting generator at the train station, because the French government, which bought the motor, refused to receive it. It turned out that Emperor Napoleon IV personally attended the ribbon-cutting ceremony for the power generation, but due to a short circuit, a large part of the wall was burned out. If the French branch did not get it right, it would suffer serious financial losses, so they promised Tesla a bonus as long as he repaired the generator and calmed down the French.

For an inexperienced person, this is a tricky errand. Fortunately, Tesla speaks French, which brings him a lot of convenience. As a result, he not only repaired the electrical fault, but also made friends with Mayor M. Bausing. Tesla later encouraged the mayor to support his invention. The mayor did find some wealthy people who could afford to invest, and Tesla showed them the electric motor he had invented. But even though the new motor worked well, these people couldn't see any real benefits in it, and Tesla was discouraged for a while. He was relieved thanks to the mayor bringing out several bottles of aged wine labeled "Saint-Estif 9001". The mayor kindly persuaded that no one deserved to drink this precious wine except Tesla.

After successfully completing the mission, Tesla returned to Paris, hoping to receive the prize. But the result was a clean shot, which left him frustrated. His three immediate bosses blamed each other, and finally Tesla realized that he had been deceived and resigned in a fit of rage.

Power Plant Manager Charles. Batchero, a longtime close friend and assistant of Edison, admired the young Serbian's abilities. He encouraged Tesla to go to the United States, where it is said that flowers and herbs are strong and money is abundant.

Batchelo was an English engineer who worked together when Edison improved the first Bell telephone. Edison invented the microphone so that each other could be heard from a distance. It was Batchelo who assisted him in carrying out the telephone trial in the midst of a noisy public.

Later, the Englishman and Edison jointly managed Edison's first commercial lighting power generation installation on the ship "Columbia". The ship sailed around Cape Horn bound for California, and as it sailed through the Delaware Bay, it was brightly lit.

Believing that he knew Edison well, Batchero wrote a glowing letter of recommendation for Tesla, introducing the two unique geniuses to each other. However, it turned out that Batchero did not know Edison as well as he thought.

Tesla sold his shabby possessions, locked the door, and rushed to the train station. Just as the train was about to leave the station, he realized that he had lost his money and ticket. As he ran after the train, he had an idea and came up with an idea at this critical juncture.

He searched for all the change he had to buy a ticket, and jumped onto the train. Later, with his incorruptible tongue, he boarded the steamship "Sadunia". Coincidentally, no one bothered about the bunk he occupied.

On the way to New York, in addition to a few copper coins left in his pocket, he only carried a few small poems and articles he had written, plus a small bag of calculations of problems that he said could not be solved. There is also a pattern of a flying machine. Indeed, at the age of twenty-eight, he had already become one of the world's great inventors. But no one knew about him.

That's how he came to Edison.

Thomas. Alva. Edison was Chinese New Year's Eve at the time, but his hair had begun to turn gray. He wore a checkered blouse, cut and sewn by Mrs. Edison's own hand, buttoned down to his chin, and bent over and shuffled in a vulgar and cowardly appearance, which at first glance did not look good, but he was a genius inventor.

Edison opened the Edison Machine Factory on Golk Street and the Edison Electric Light Company at 65 Fifth Street. He opened a power station at 255-57 Pearl Street, which supplied electricity to the entire Wall Street and East River District, and he also had a huge research institute in Menlo Park, New Jersey, employing a large number of people.

Sometimes Edison himself came to the institute and circled around "a small locomotive steel monster." The locomotive, which was supplied with direct current from a power station behind the institute, was once speeding on the railroad tracks at a speed of forty miles per hour, much to the delight of the inventor. Salah. It was at this institute that Bernhard recorded, and Edison's phonograph preserved her singing voice forever. She respectfully said that Edison was like Napoleon I in many ways.

In addition to the Pearl Street Power Station, which lights hundreds of buildings in New York's wealthy homes, Edison also supplied direct current to factories and theaters throughout the city.

Edison was also a figure who made many brilliant judgments. He has a mantra: "No one in business steals,...... I stole quite a few myself. But I know how to steal. They don't know how to steal ......" The "they" here refer to the Western United Company. On the one hand, he worked for this company, and on the other hand, he sold a competitive invention to the company's rivals. (To be continued.) )