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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Phonomotor ： ウィキペディア英語版 Phonomotor The phonomotor or "vocal engine" was a device invented by Thomas Edison in 1878 to measure the mechanical force of sound. It converted sound energy or sound power into rotary motion which could drive a machine such as a small saw or drill. It derived from his work on the telephone and phonograph. ==Operation== Sound waves entering a mouthpiece and falling on a diaphragm were conveyed by a piece of rubber tubing and a spring to a pawl, which vibrated against a very fine-toothed ratchet wheel. The diaphragm and mouthpiece were similar to those used on the phonograph. Vibrations caused by the voice caused a shaft and flywheel to rotate.〔"Edison's Phonomotor," Scientific American, July 27, 1878, page 51.〕〔Meadowcroft, William Henry, ''(Scholars' A B C of electricity )'', Hinds, Noble & Eldridge, New York, 1896, pages 55–56. Retrieved October 29, 2010〕 Steady pressure from breath produced no motion, but some voices could produce rapid motion. The speed of rotation depended on the pitch of the sound. It was able to operate a small drill or saw which could bore or cut wood. When a long sustained sound got the flywheel up to an appreciable speed, considerable force was required to stop it.〔Dickson, William Kennedy-Laurie, and Dickson, Antonia, ''(The life and inventions of Thomas Alva Edison )'', Thomas Y. Crowell & Co., Boston, 1894, pages 163–164. Retrieved October 29, 2010〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Phonomotor」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.