2号共電式卓上電話機 / Tabletop Common Battery Telephone

3D Model

東京都江戸東京博物館　収蔵品
Collection: The Tokyo Metropolitan Edo-Tokyo Museum

タイトル / title ：2号共電式卓上電話機 / Tabletop Common Battery Telephone No. 2
資料番号 / Collection ID：99000215

解説 / Description:
初期の電話機は内部に磁石式の発電機を持ち、ハンドルを回して発電することで交換手につながる仕組みだった。その後に登場し大正期に普及した共電式は、受話機を上げるだけで交換手にすぐつながる設計で、発電機が不要なため本体が小型化され、故障も少なくなった。
Early telephones had a magnetic generator inside and the user was connected to the operator by turning a handle that generated electricity. The common battery system, which appeared later and became popular during the Taisho era, was designed to connect to a switchboard by simply lifting the receiver. Since a generator was no longer needed, the main unit became smaller and less prone to breakdowns.