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Henry Quackenbush : ウィキペディア英語版 | Henry Quackenbush
Henry Marcus Quackenbush (April 27, 1847 – September 8, 1933), commonly called "H.M.", was an American inventor and industrialist who founded the H.M. Quackenbush Company〔(Quackenbush website )〕 in Herkimer, New York. His company was widely known for its air rifles and for the invention of the metal, spring-jointed nutcracker.〔(【引用サイトリンク】url=http://www.ideafinder.com/history/inventions/nutcracker.htm )〕 ==Early apprenticeship and invention of extension ladder==
Quackenbush was born in Herkimer, New York, in 1847. At age fourteen, he began an apprenticeship at gun manufacturer Remington Arms Co.,〔(【引用サイトリンク】url=http://www.www.quackenbush.com/hmq/hmq.html )〕〔(【引用サイトリンク】url=http://www.allthingsquackenbush.weebly.com/the-inventor.html )〕 where he acquired skills as a metalworker and gunmaker. At the age of 16, he invented the extension ladder, which he patented on Oct. 22, 1867,〔(【引用サイトリンク】url=http://www.google.com/patents/US70016.pdf )〕 and then began manufacturing them himself, until he sold the patent for $500.〔 Several years later, he left his job at Remington to start his own metal working and gun shop in his hometown of Herkimer.
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「Henry Quackenbush」の詳細全文を読む
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