Sun Yi gave an order, and several craftsmen who often gathered together to ponder electricity brought up a pile of wooden shelves. Pen & Fun & Pavilion www.biquge.info

Nowadays, these craftsmen who often ponder electricity also have a name in ironwood, called "electricians", and the electric gong and drum rack that can change the drum beat was invented by these electricians.

Everyone watched the electrician busy supporting the wooden frame, and they didn't know what medicine was sold in Sun Yi's gourd.

In the center of the wooden frame is a round stick that is horizontally framed on two standing logs, which can be rotated at will, looking like a shaft, and the wooden frame on the left and right sides of the shaft looks like a shelf where anything can rest, nothing new.

Sun Yi took out two electromagnet rods to explain to everyone: "Magnets are repelled by the same sex and attracted by the opposite sex. ”

After that, Sun Yi used one electromagnet to approach the other electromagnet, and the other electromagnet rolled away, and the electromagnet in Sun Yiyi's hand turned around, and the other electromagnet was attracted back in a hurry.

Magnets are repelled by the same sex and attracted by the opposite sex, which is now the common knowledge of ironwood craftsmen, and everyone agrees.

Sun Yi arranged for the electrician to fix several electromagnets in one direction on the wooden frames on the left and right sides of the wooden shaft, and then said: "The magnetic force of these magnets is superimposed in one direction to form a larger magnet. ”

Sun Yi took off the wooden shaft in the center of the shelf, and everyone saw that there were two through holes in the center of the wooden shaft.

Insert an ordinary magnet into one of the holes to form a "ten" with the wooden shaft, and put the "ten" shaft back into the wooden frame, and the magnet quickly turns the direction to be consistent with the magnetic direction of other electromagnets.

Sun Yi fiddled with the cross shaft several times, and the magnet quickly drove the wooden shaft back to its original position.

Sun Yiyi: "This is still the truth that the same sex repels and the opposite sex attracts." ”

Everyone nodded, and there was nothing difficult to understand.

Sun Yiyi: "Now I replace this ordinary magnet with an electromagnet, as you know, the effect should be the same." ”

After that, Sun Yi took over a special electromagnet.

It is said that this electromagnet is specially made, because the core of this electromagnet is forged from precious pure iron, and a total of two are built, and all the pure iron accumulated by the small pomegranate is used up.

Another special feature of this electromagnet is that the coils around it are all pure electrolytic copper. Because pure copper is soft, it can be drawn finer than ordinary copper wire. At the same time, the resistance of pure copper is small, and it can also be pulled thinner, so it will not heat up when it is energized.

The thin pure copper wire is also not insulated with gypsum between the turns, because the pure copper wire itself is enamelled.

This is all thanks to the baby's adoptive father, Carpenter Yang. Among the four dowries that the carpenter gave to the milk baby was a fluttering inkstone. Sun Yi usually doesn't write calligraphy, so he uses this inkstone as a trash can on the dining table.

After being discovered by Daoist Jia, the Taoist priest was so distressed that he hugged the inkstone and almost jumped into the Yellow River. The Taoist priest complained to Sun Yiyi: "This is a precious lacquer inkstone, which will not sink when placed in water, and it will not leave scratches no matter how you grind the ink." Lacquer inkstone originated in the Song Dynasty, the name of the lacquer used is Song lacquer, and now the lacquer inkstone has not been made for many years. Lord, lord, lord, you actually regard the lacquer inkstone as a ......".

Daoist Jia was so distressed that he couldn't speak.

Sun Yi curiously checked it with his mobile phone, and found that the natural lacquer produced by the lacquer tree has super wear-resistant and super-insulating properties. Song lacquer is the pinnacle of ancient Chinese lacquer art, which has been lost in later generations. It is said that Japan reinvented the Song lacquer process, named "Chinese lacquer", and a small wooden stool lacquered with Japan's "Chinese lacquer" will be sold for hundreds of thousands in later generations!

Because the lacquer is super wear-resistant, the lacquer inkstone made by the Song lacquer process is the best inkstone recommended by the ancient public, and it is much more famous than the well-known inkstone in later generations, but it is a pity that the craftsmanship has been lost in later generations.

I didn't expect that Yang carpenter would actually know how to make lacquer craftsmanship and make lacquer inkstones. Sun Yi ran to ask Carpenter Yang, and Carpenter Yang said lightly that the craftsmanship of lacquer inkstone has been passed down from generation to generation in their Yang family, but no one wants to come forward. The reason is very simple, if the Ming Dynasty government knew that the Yang family would make precious lacquer inkstones, the government would definitely let the Yang family, who was registered as a craftsman, make as much tribute as they did every year, and would not pay a penny, and would not be able to pay the crime on time. Carpenter Yang said that there were many craftsmen like the Yang family with unique craftsmanship in the Ming Dynasty, and they would rather lose their craftsmanship than make a noise.

Sun Yi sighed again and again and asked Yang carpenter to use the super insulation properties of lacquer to make enameled copper wire.

In addition to being super wear-resistant and super-insulating, lacquer also has the characteristic that it is particularly hard after the lacquer dries. Carpenter Yang tried it several times, and the enameled wire was so hard that it could not be wound into a coil. In the end, the two could only compromise, taking advantage of the enameled wire to wrap it into a coil when it was not dry, and waiting for the lacquer to dry and fix all the shapes.

Sun Yi inserted this precious special electromagnet into the hole of the wooden shaft and fixed it, connected the battery, and the battery iron was stunned and drove the wooden shaft to turn into a direction consistent with the magnetic force of other magnets.

Sun Yi explained: "The magnetism of this electromagnet with many layers of coils is very strong, so the attraction and repulsion between it and other magnets are stronger. ”

This was the first time Sun Yi had assembled these wooden shelves and electromagnets, and it was also the first time that the electricians had seen them. An electrician stepped forward to fiddle with the wooden shaft, and immediately the shaft stubbornly returned to its original position.

Sun Yi disconnected the battery, and his fingers turned the wooden shaft, which creaked and spun a few times.

Sun Yi explained: "Pure iron is a soft magnetic material, and there will be no remanence after the power is removed, so there is no same-sex repulsion and opposite-sex attraction. ”

Connected back to the power supply, the wooden shaft was again in line with the direction of the other magnets, and Sun Yiyi: "Everyone, pay attention, I now turn the two poles of the battery." ”

Before the words fell, the electromagnet and the wooden shaft were stunned and rotated 180 degrees.

Sun Yiyi: "I'll turn the battery poles again. ”

The electromagnet with the wooden shaft was stunned and rotated 180 degrees again.

Sun Yi gave everyone a question to think about: "What happens if I turn the battery poles once every time the wooden shaft is in place?" ”

Silent.

An electrician finally replied, "The electromagnet will drive the wooden shaft to rotate non-stop." ”

"Yes!" Sun Yi affirmed, "It's just that my hands are not so fast, so I have to use these copper sheets." ”

One end of the wooden shaft was inlaid with several pieces of copper foil, and Sun connected the enameled wire of the electromagnet. Then use two copper sheets to make a brush, just pressed on the copper foil, every time the wooden shaft rotates half a circle, the copper foil automatically changes the position once, which is equivalent to changing the two poles of the battery once.

Sun Yi plugged the copper brush into the battery, and with a "buzz" sound, the wooden shaft rotated non-stop under the drive of the electromagnet that changed the direction of the magnetic force.

"This is called ......", Sun Yigang wanted to say "This is called an electric motor", Wang Erniu shouted, "Tram!" It's called a tram! ”

According to the rules of the Ming Dynasty, those who can turn are called cars. A horse-driven car is called a horse-drawn carriage, a cow-driven car is called an ox cart, a wind-driven car is called a windmill, a water-driven car is called a waterwheel, and the electrically driven car in front of you is of course called a tram!

Sun Yiyi is good from Wang Erniu.

He went on to explain: "The strength of the tram in front of me is still very small, because the magnetic force of the electromagnet on the wooden frame and the electromagnet on the wooden shaft is not strong, and if you find a way to increase the magnetic force, the tram will be more powerful!" Imagine what it would be like if the tram drove the spinning wheel to spin the thread, the fan to fan the wind, the overturned car to lift water, the armored raft to drive the water jet tank, and even the stone mill. ”

While everyone was in a dream, Sun Yi disconnected the power supply, inserted another special electromagnet into another hole in the wooden shaft and fixed it, and the two electromagnets formed a cross. Similar to the previous electromagnet, the enameled wire of this electromagnet is fixed to two other copper foils and connected to the battery through two other copper brushes.

When the power is turned on again, the tram spins more smoothly and powerfully.

Sun Yi kept adding auxiliary external magnets to the left and right of the wooden shaft, and the tram turned more cheerfully.