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Herrmann Wall Phone
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Herrmann Wall Phone : ウィキペディア英語版
Herrmann Wall Phone

The Herrmann wall phone was a type of telephone, created by the Portuguese inventor, Maximiliano Augusto Herrmann, in 1880.
The pioneering use of buttons to activate the telephone played a fundamental role to the opening of public lines in the main cities of Portugal.〔http://www.fundacao.telecom.pt/en/Home/HistoryandHeritage/PTsHistory/HistoricalEquipment/Detail/tabid/350/itemId/545/parId/346/Default.aspx〕 The telephone was composed by a double earpiece, made with long flexible tubes, and a transmitter fixed to main body of the machine.
Its inventor, Maximiliano Augusto Herrmann, worked for the North and East Portuguese Railway Company (Portuguese: ''Companhia dos Caminhos-de-ferro do Norte e Leste'') as telegraph lines inspector. He later opened a workshop dedicated to the production of precision instruments.
==References==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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