Chapter 579 Vacuum Pump

"Look, this is what's called an air extractor."

Paul patted the thing called an air extractor or vacuum pump with his hand. It seemed to be fixed on the table.

Wells approached it and studied it carefully.

The main part of this thing is a metal can. There are two valves on one end of the metal can. One valve can only be opened inward, and the other valve can only be opened outward. A metal rod extends from the other end of the can. This metal rod is connected to a second metal rod through a movable circular shaft, and the other end of the second metal rod is fixed on the edge of a runner. , it is not accurate to describe it as fixed, because it is also placed on the runner with a round shaft, and there is a rocker on the runner.

Guy Burns spontaneously introduced him. He first pointed to the metal can and said: "Great chemist, look at this. This is a gas can with a piston inside and two valves. One is called the intake valve. , one is called the air outlet valve. When the piston is pulled outward, the air inlet valve opens and the air outlet valve closes, drawing air into the air tank. When the piston is pushed inward, the air inlet valve closes and the air outlet valve opens, pumping air into the air tank. The air is discharged.”

He pointed to the connecting rod and runner behind the metal can and said, "This is called a crank connecting rod device. Its function is to convert the rotational motion of the runner into a reciprocating motion that pushes and pulls the piston. Of course, it can also be used in other machinery. You can do it the other way around. Then, we crank the handle to move the piston in the tank in and out."

After listening to his introduction, Wells sincerely admired: "It is indeed a wonderful device. So, is Mr. Grayman going to use this air extractor to evacuate the interlayer of the bottle into a so-called vacuum?"

"Yes." Paul snapped his fingers.

"When I was making this thing, I had some trouble with the piston inside. I originally used linen soaked in oil, but that piston wasn't airtight enough and it leaked when I pumped it. Later it was made of animal leather. A serviceable piston.”

As Paul spoke, he picked up a short metal tube and connected one end to the hole in the glass bottle and the other end to the air inlet of the air extractor. Both ends of the short tube were wrapped with a thin layer of leather, which should be the same. Used to ensure air tightness.

After all this was done, Paul shouted, "Someone!"

The door of the workshop was pushed open, and the guard standing outside walked in. "Lord Grayman, do you have anything to tell me?"

Paul pointed at the wheel behind the air extractor and ordered: "You shake it."

The guard glanced at the air pump and was a little confused, but he still obeyed the order, walked to the machine, held the crank handle with his right hand, and turned it. As he shook it, the rotating wheel began to push the connecting rod to expand and contract, constantly pushing and pulling the piston in the gas tank.

Thirty people, Paul, Wells, and Burns, looked at the bottle without moving their eyes.

From the perspective of Wells and Burns, nothing seemed to have changed. After all, the air was inherently transparent.

Only the connecting rod that pushed the piston was constantly moving, but gradually, they saw that the guard who was shaking the crank was obviously increasing his strength, and then, it seemed that shaking the crank made him feel more and more strenuous.

The air outlet valve of the air extractor was closed and closed, which proved that the gas was being continuously eliminated. However, at this moment, something unexpected happened. With a bang, the bottle made of double-layer glass broke and became Into a pile of fragments. Fortunately, the bottle did not explode and no one around was hurt.

This change shocked everyone. Wells and Burns stared blankly at the glass fragments, while the guard was even more stunned, and could even be said to be at a loss.

"Lord Grayman, I'm sorry, I...I didn't expect to break him." The guard blushed and apologized to Paul repeatedly.

"Ah, it's okay. This could have happened."

Only then did Wells and Burns notice that the Earl had a calm expression on his face, as if he was not surprised by the shattering of the glass bottle.

"It's strange." Guy Burns scratched his head and asked, "Why did the glass bottle break? It wasn't hit by anything."

Yes, everyone was staring at the unfortunate bottle, and nothing flew over to hit it.

"Yeah, why did the bottle break?" Paul also asked, but to Wells' ears, there was no sense of doubt in the earl's words.

"There must be something there that exerted [force] on the bottle, so it broke." Paul said.

What could that be? After listening to the earl's words, Wells thought, it seems that there is only air around him.

Um, air? Haha, joke. He pushed the thought out of his mind.

"Well, anyway, we're going to have to get a sturdier bottle, maybe thicken the walls of the glass," Paul concluded. "I'm going to have to find someone to make a new one. Ah, by the way, Wells."

Paul looked at the alchemist, "What brings you to me?"

Ah, yes, he can come to the lord if he has important matters. Wells remembered the purpose of coming to the lord's mansion.

"Well..." He said with some anxiety: "Master Graiman, I have a student, he..."

"What happened to him?" Paul waited for Wells to continue.

"Well... he is a very talented person in chemistry, with an active mind and excellent grades. He has helped us a lot in the laboratory."

There is no mistake in every song, one post, one content, one 6 one, one book, one book, take a look!

"Hmm, so what? Do you want me to grant him a position? Aren't all things in the chemistry lab under your and Hoffman's control? You don't have to come to me." Paul was a little confused. Was Wells here to get in through the back door? Or did he and Hoffman have some disagreements on how to treat this student, and he needed to make a ruling.

"But unfortunately..." Wells lowered his head and whispered, "This student... His last name is Fadeev."

Fadeev? Paul narrowed his eyes. If he remembered correctly, Fadeev seemed to be a country gentleman family that participated in the rebellion.

"So... your student..." Paul's tone lost the enthusiasm just now, "Is he in jail now?"

The interrogation of the rebels is currently underway, and all the families involved in the rebellion have been detained as a whole clan.

"Yes, Lord Graman."

"So, why did you come to me?" Paul asked Wells again about the purpose of coming here, with a hint of impoliteness in his words.

Wells felt the change in the earl's tone, and his heart beat faster. The earl seemed to be very sensitive to this.

"I want to ask you, Lord Graman, can you... can you show some leniency to my student?"

Wells said his request carefully. Coming from Jingyao, he knew that many lords would treat those who were related to the rebellion with expulsion and exile at worst, and some ruthless ones might just kill them all.

He didn't believe that his student would really participate in the rebellion, but what would the earl think?