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Galileo Galilei.

"And yet, it moves." Galileo Galilei(1564-1642)

Italian physicist, astronomer, philosopher. According to his achievement he is called the father of astronomy. He advocates Copernican theory and was accused of being heresy. He was sentenced to life imprisonment at a religious trial and lived in a state of arrest.


Galileo Galilei, famous for the above statements, devised a pendulum clock in his later years. (Actually, he did not make it.) This is due to discovering the isochronism of the pendulum that "the time required for one round trip is constant even if I shake a large or small swing".
He also found the law of falling body. In order to prove this law it is said that they both dropped two types of large and small balls at the same time from the top of Leaning Tower of Pisa and showed that they both landed at the same time. Many researchers say that this famous episode is the creation of Galileo 's disciple Vincenzo Viviani, which is not actually done.
If he used this pendulum as a governor, he could have made a more accurate clock, but he took over to his son without looking at completion. However, his son could not produce a complete pendulum clock.

"I've loved the stars too fondly to be fearful of the night." The earth moves, the sun rises again, it repeats.


「それでも地球は動いている。」ガリレオ・ガリレイ(1564年~1642年)

イタリアの物理学者、天文学者、哲学者。その業績から天文学の父と称される。ガリレオが地動説を唱え、異端であると訴えられる。宗教裁判にて終身刑を言い渡され、軟禁状態での生活を送った。


上記の名言で有名なガリレオ・ガリレイはその晩年に振子時計を考案した。(実際には製作はしなかった。)これは「振子は大きく振っても小さく振っても、その一往復に要する時間は一定である」という振子の等時性を発見したことによる。
彼はまた、落体の法則を発見した。この法則を証明するために、ピサの斜塔の頂上から大小2種類の球を同時に落とし、両者が同時に着地するのを見せたとも言われている。この有名なエピソードはガリレオの弟子ヴィンチェンツォ・ヴィヴィアーニの創作で、実際には行われていない、とする研究者も多い。
この振子を調速機として用いれば、より精度の高い時計を作ることができるはずであったが、完成を見ずに息子へ引き継いだ。しかしながら、息子も完全な振子時計を製作することができなかった。

「私はあまりに深く星を愛しているがゆえに、夜を恐れたことはない。」地球は動き、日はまた昇り、繰り返していく。

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Even waterproof watches should not be excessively exposed to the threat of water. If you operate the watch crown or button with moisture adhering, water enters inside the watch. If you take a bath while wearing a watch, ingredients such as steam, soap, hot springs will discolor and corrode the metal, and the packing will be deteriorated. If you wash your hands directly from the faucet, watering the watch causes waterproof failure because tap water has high water pressure. The watch is sometimes cloudy due to the temperature difference between the outside air and the inside of the watch. It will not be a problem if it is temporary. 防水時計であっても、過度に水の脅威に晒すことはさけなければならない。 水分が付着したまま、リューズやボタンを操作する。(時計内部に水が入る。)時計を着用したまま入浴する。(蒸気・石鹸・温泉の成分などが金属を変色・腐食させたり、パッキンの劣化を早める。)手を洗う際に直接蛇口から水をかける。(水道水は水圧が高いため、防水不良を引き起こす。) 外気と時計内部の温度差によりくもりが生じることがあるが、一時的なものであれば問題ない。