Abt, R. (English spelling) AbtR

Japanese: Abt,R.(英語表記)AbtR
Abt, R. (English spelling) AbtR

…A geared railway invented by the Swiss Roman Abt (1850-1933). It is used for steep mountain railways. Two or three steel strips with sawtooth teeth are laid in the center of the left and right rails, with the teeth offset in an alternating manner, and the gears on the bottom of the car engage with them to generate driving force. It is possible to climb and descend steep slopes that would cause a normal railway (adhesion type) to slip, and some have a maximum slope of 250‰. In Japan, it was used from 1893 to 1963 on the Shinetsu Main Line between Yokokawa and Karuizawa, about 8 km long (maximum slope 67‰). …

*Some of the terminology explanations that mention "Abt, R." are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…スイスのアプトRoman Abt(1850‐1933)の発明した歯車式鉄道。急こう配の登山鉄道などに利用される。帯鋼板にのこぎり状の歯を刻んだもの2~3枚を,歯の位置が交互にずれるように組み合わせて左右のレールの中央に敷設し,これと車両下部の歯車をかみ合わせて駆動力を得るものである。ふつうの鉄道(粘着式)では滑ってしまうような急こう配でも登降が可能で,最急こう配が250‰のものもある。日本では信越本線横川~軽井沢間約8km(最急こう配67‰)で1893‐1963年まで用いられていた。…

※「Abt,R.」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

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