Ktesibios (English spelling)

Japanese: クテシビオス - くてしびおす(英語表記)Ktēsibios
Ktesibios (English spelling)
A mechanical engineer active in Alexandria around the 3rd or 2nd century BCE. Dates of birth and death unknown. He was the forerunner of other mechanical engineers of this era, such as Philo of Byzantium and Heron of Alexandria, and was the source of all technological activity up until the Roman era. His writings have been lost, but one of the things he is thought to have invented was the water clock, a clock with a moving hand designed to keep the amount of water flowing in from a pipe constant (water pressure constant).

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
前3世紀ないし前2世紀ころアレクサンドリアで活躍した機械技師。生没年不詳。この時代に出た機械技師のビュザンティオンのフィロンやアレクサンドリアのヘロンの先駆者であり,さらにローマ時代にいたるまでのあらゆる技術的活動の根源をなしている。彼の著作は失われているが,たぶん彼が発明したと思われるものとしては,まず水時計がある。これは,導管から流入する水の量がつねに一定(水圧が不変)であるようにくふうされた動針時計であった。

出典 株式会社平凡社世界大百科事典 第2版について 情報

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