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A reciprocating electric motor is a motor in which the armature moves back and forth rather than circularly. Early electric motors were sometimes of the reciprocating type, such as those made by Daniel Davis in the 1840s.〔(【引用サイトリンク】title=Motors )〕 Today, reciprocating electric motors are rare but they do have some niche applications, e.g. in linear compressors for cryogenics〔(【引用サイトリンク】title=Preprint valved linear compressor )〕〔(【引用サイトリンク】title=ABSTRACT )〕 and as educational toys.〔("WONDERMAGNET.COM NdFeB Magnets, Magnet Wire, Books, Weird Science, Needful Things" ). ''wondermagnet.com''. Retrieved on 31 March 2015.〕 ==History== Daniel Davis was an early maker of reciprocating electric motors.〔(【引用サイトリンク】title=Reciprocating Armature Engine )〕 As can be seen in these examples, early motors of this type often followed the general layout of the steam engines of the day, simply replacing the piston-and-cylinder with an electromagnetic solenoid. File:Motor Page.jpg|Unknown maker, 1873 File:Motor Grüel.jpg|Grüel elektromotor, 1873 File:Motor Page LehrbuchPhysik S516.jpg|Unknown maker, 1881 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「Reciprocating electric motor」の詳細全文を読む スポンサード リンク
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