Volume 4 - Chapter 4 – Golem Engine (2/2)

But since there wasn’t a concept of gears, as long as there wasn’t a reference, it was hard to make it perfect.

「Hmm, how exactly can I make the model.」

Jin was grumbling as he ate breakfast. Reiko was worrying at the situation.

「Father, you have to stop thinking about it during meals.」

「Oh, ah? You’re right. ……In short first divide the circumference equally……」

「Father!」

Unable to hold it in, Reiko finally scolded Jin.

「……Reiko?」

Surprised by Reiko’s yelling, Jin looked at Reiko.

「Ah, ah, a……」

Reiko herself was surprised that she yelled at Jin.

「I-I’m very sorry.」

Whoever she learned from, Reiko went into a dogeza.

「I have had an irreverent attitude to Father. Please punish me! 」

「…………」

Jin reached for Reiko. Reiko had already determined her resolution. She wouldn’t defend or do anything, when Jin’s hands touched her, she would be deconstructed in a blink of an eye.

But contrary to expectation, Jin’s hands gently stroked Reiko’s head.

「Sorry Reiko, I made you worry. It’s as you say. From now on correct me if I’m wrong.」

「……You’re not angry?」

「Why should I be mad. Reiko yelled because you were thinking of me.」

Jin said while eating the rest of breakfast.

Jin had been thinking since the morning but hadn’t come up with any good ideas. After lunch, Jin was drinking tea at the mansion. The cup in his hand was cylindrical. He fiddled around with it while thinking of gears.

「In short, I can translate a single gear into copies. With that I can make any number of identical teeth.」

Ball bearings only need to be the same weight and spherical but a gear cannot deviate even slightly.

「Father, please don’t try the impossible.」

Reiko was anxious seeing Jin suffer like this.

But Jin didn’t seem to hear it.

「…………」

Reiko came to the conclusion that it wasn’t possible to stop Jin from thinking about it. Instead it would be better to help him to get him out of this state.

Therefore, using Engineering magic, Reiko processed a wooden board that was at hand into a circular shape. Shapes of various diameters were created and placed in front of Jin.

「Hmm? This is?」

Jin noticed it and looked up.

「I was wondering if this could help Father think.」

Jin took one in his hand. Disc. When combined it made a friction drive. In order to increase friction, teeth were cut into the side of the disc.

(TLSilent: needs to be double checked.)

「First you have to think about the materials, you want a material that won’t slip……」

A thought suddenly hit Jin.

「That’s right! First of all create a linear gear……rack. Then cut the number of teeth required, round them off……done!」

「Father?」

「Ah, Reiko. Looking at the disc you made me, I thought of something. Thank you.」

Jin stroked Reiko’s head while saying so. Reiko’s narrowed eyes looked very happy.

「With this, I can probably make spur gears. If I can make spur gears, it is likely I can also make bevel gears.」

In short, because of the equal divisions of the circumference, it is easy to make, using that as a reference, harder production is possible.

「Father, it’s time for dinner.」

Reiko said,

「Hmm? It’s this time already.」

The moon was already in the sky.

「I’m starting to feel hungry as well.」

Jin stretched while saying so and went for the meal.

＊　　　＊　　　＊

But after dinner, Jin started thinking of a wide variety of ways to fabricate gears, very late at last came up with a method.

「Okay, you can go to sleep now. Goodnight Reiko.」

「Yes Father, goodnight.」

Relieved that Jin also went to bed, Reiko was glad to be patted by Jin today.