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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 Board shear ： ウィキペディア英語版 Board shear Used extensively in bookbinding, a board shear is a large, hand-operated machine for cutting board or paper. Like scissors, a board shear uses two blades to apply shear stress exceeding the paper's shear strength in order to cut. The stationary blade forms the edge of the cutting table, with the moving blade mounted on a cutting arm. Originally known as a table gauge shear because its gauge allowed the cutting of consistently-sized materials, the board shear resembles a larger version of the paper cutters commonly found in offices. The earliest known reference to a board shear comes from an 1842 supplement to ''Penny Magazine'', titled ''A Day at a Bookbinder's'', which included a drawing of a board shear with many of the major developments already present. An 1854 article on the history of bookbinding from ''The Bookbinder's Trade Circular'' describes early board shears, and places their development in "about 1836"; credit for the invention is ascribed to Warren De La Rue in the ''Reports of the Juries'' from the Great Exhibition of 1851. Many modifications of the basic design were made in the 19th century, with changes such as rack-and-pinion adjustment for the outer gauge〔Brombacher, C. U.S. Patent 43634, 1864.〕 and improved clamp bars.〔Robinson, J.T. U.S. Patent 225871, 1880.〕 By the late 19th century, board shears were substantively the same as modern machines, and many 19th-century board shears are still in use today. == References == 〔 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「Board shear」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.