Torajiro Omoto - Torajiro Omoto

… In Japan, in 1902, Yato Ryoichi applied for a patent for a hand-cranked calculator called the Automatic Abacus, which he had originally conceived, and in the following years several hundred were manufactured and sold. In 1923, Omoto Torajiro created the Tiger Calculator, and by around 1970, about 500,000 had been manufactured and sold, and they were affectionately known as the Tiger. During this period, many electric calculators were also made, which replaced the force of the hand crank with the power of a motor. …

*Some of the terminology that refers to "Tora-san Omoto" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…　日本では，1902年に矢頭良一が独自の構想による手回し計算機〈自働算盤〉を特許出願し，その後数年間に二百数十台を製造･販売した。23年には大本寅次郎が〈虎印計算機〉を作り，以後，70年ころまでに約50万台を製造･販売し，〈タイガー〉の愛称で親しまれた。この時期には，手で回す力をモーターの動力に代えた電動計算機も数多く作られた。…

※「大本寅次郎」について言及している用語解説の一部を掲載しています。

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