翻訳と辞書 Words near each other ・ Knife play ・ Knife Point ・ Knife Point Glacier ・ Knife Point Mountain ・ Knife rest ・ Knife River ・ Knife River (disambiguation) ・ Knife River (Lake Superior) ・ Knife River (Minnesota-Ontario) ・ Knife River (Snake River) ・ Knife River Bridge near Stanton ・ Knife River Indian Villages National Historic Site ・ Knife River, Minnesota ・ Knife River, Montana ・ Knife sharpening ・ Knife switch ・ Knife throwing ・ Knife Tree ・ Knife-Edge (Emerson, Lake & Palmer song) ・ Knife-edge effect ・ Knife-edge scanning microscope ・ Knife-footed frog ・ Knifeandfork ・ Knifefight ・ Knifefish ・ Knifefish (robot) ・ Knifehand strike ・ Knifehandchop ・ Knifemakers' Guild ・ Knifer 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 Knife switch ： ウィキペディア英語版 Knife switch A knife switch is a type of switch used to control the flow of electricity in a circuit. It is composed of a hinge which allows a metal lever, or knife, to be lifted from or inserted into a slot or jaw. The hinge and jaw are both fixed to an insulated base, and the knife has an insulated handle to grip at one end. Current flows through the switch when the knife is pushed into the jaw. Knife switches can take several forms, including single throw, in which the "knife" engages with only a single slot, and double throw, in which the knife hinge is placed between two slots and can engage with either one. Also, multiple knives may be attached to a single handle and can be used to activate more than one circuit simultaneously. ==Current uses== Though used commonly in the past, knife switches are now rare, finding use largely in science experiments where the position of the switch may be plainly seen in demonstration. The knife switch is extremely simple in construction and use, but its exposed metal parts present a great risk of electric shock, and the switch is subject to arcing when opened at higher voltages, which poses a further risk of shock or burns to the operator and can cause fires or explosions under certain conditions. Open knife switches were supplanted by safety switches with current carrying contacts inside a metal enclosure which can only be opened by switching off the power. In modern applications, automatic switches (such as contactors or relays), and manual switches such as circuit breakers are used. These devices use a snap action mechanism which opens the switch contacts rapidly, and feature an arc chute where the arc caused by opening the switch is quenched. These devices also prevent injury due to accidental contact, as all of the current carrying metal parts of the switch are hidden within or surrounded by insulating guards. 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「Knife switch」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.