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Speed square : ウィキペディア英語版 | Speed square
A Speed® Square (rafter square, rafter angle square, triangle square) is a triangular-shaped, carpenters' marking out tool manufactured and sold by Swanson Tool Co., Inc. The Speed® Square combines some of the most common functions of the combination square, try square, and framing square into one. It is used to make basic measurements and mark lines on dimensional lumber, and may be used as a saw guide for making short 45 and 90 degree cuts. ==History== A Speed® Square is a carpenters layout tool invented in 1925 by Albert J. Swanson who later founded Swanson Tool Company, Inc. to produce his invention.〔(Swanson Tool Co. website )〕 Today, Swanson Tool Co. continues to manufacture and distribute the Speed® Square and other carpentry tools from its headquarters in Frankfort, Illinois. SPEED® and SPEED SQUARE® are also registered trademarks of Swanson Tool Co., Inc.〔(U.S. Patent and Trademark Office Database - SPEED )〕 〔(U.S. Patent and Trademark Office Database - SPEED SQUARE )〕
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「Speed square」の詳細全文を読む
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