JST科学技術用語日英対訳辞書

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rotary system

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日英・英日専門用語辞書

日中韓辭典研究所

ウィキペディア英語版

出典:Wikipedia

Rotary system

出典:『Wikipedia』 (2011/04/22 13:24 UTC 版)

英語による解説

ウィキペディア英語版からの引用
引用

The Rotary machine switching system was a type of automatic telephone exchange manufactured and used in Europe from the 1910s. It was developed by Bell Labs in the United States when they were developing the Panel system . The Rotary and Panel systems had many features in common, for example machine-driven switches and sequence switches (step switches) powered via shafts and clutches, and revertive impulsing from the switches back to the controlling Register which received the dial impulses; but the switches were smaller (200 rather than 500 outlets). The initial version was called 7A, succeeded by 7A1 and then 7A2; with a 7D rural system also.

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