翻訳と辞書 Words near each other ・ Echigo-Hirota Station ・ Echigo-Horinouchi Station ・ Echigo-Ishiyama Station ・ Echigo-Iwasawa Station ・ Echigo-Iwatsuka Station ・ Echigo-Kanamaru Station ・ Echigo-Kangawa Station ・ Echigo-Katakai Station ・ Echagere ・ Echague, Isabela ・ ECHAM ・ Echana ・ Echanella ・ Echanella hirsutipennis ・ Echaporã ・ Echappement naturel ・ Echarate District ・ Echard ・ Echaristha pictipennis ・ Echarlens ・ Echarri ・ Echaskech ・ Echassières mine ・ Echat ・ Echaz ・ Echchil Iravugal ・ Echea ・ Echeandia ・ Echeandía ・ Echeandía Canton Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Echappement naturel ： ウィキペディア英語版 Echappement naturel The échappement naturel was the invention of Abraham Louis Breguet, one of the most eminent watchmakers of all time. Following the introduction of the detent chronometer escapement with a temperature compensated balance, very close rates could be achieved in marine chronometers and to a lesser degree in pocket chronometers. This achievement was due, other things being equal, to the minimal interference with the balance during unlocking and impulse. A further key advantage of this escapement was that there was no need for oil on the escapement’s working surfaces and hence no deterioration in the friction between the working surfaces as the oil aged. A drawback was that the detent escapement as it was used in pocket chronometers was prone to stopping as a result of motion. Most escapements are capable of being stopped by a sudden movement but the detent escapement gives an impulse to the balance only when it is moving in one direction. The escapement is therefore not self-starting. The lever escapement, as used in most modern mechanical watches, avoided this problem. In common with most other escapements it gave an impulse to the balance in both directions of the balance swing. This creates another problem in doing so because the introduction of a lever between the balance and the final (escape) wheel of the escapement requires lubrication on the acting surfaces. ==Breguet's invention== Breguet realised that this problem (more serious at the time because of the rather poorer oils then available) could be removed and many of the advantages of the detent escapement retained if an impulse were given in both directions of the balance. In order to do this he geared two escape wheels together, one escape wheel driven by the fourth wheel of the wheel train, which in turn was geared to and drives a second escape wheel. A pivoted detent swings freely between them and locks each escape wheel in turn on a coaxial set of locking teeth. 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「Echappement naturel」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.