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aviation pioneer. entrepreneur. Known for. Inventing the mechanical pencil. Spouse. Emily Stoffregen. Children. 4. Slavoljub Eduard Penkala (Croatian pronunciation: [slâʋɔʎuːb ɛ̂duard pɛŋkǎːla]; 20 April 1871 – 5 February 1922) was a Croatian engineer and inventor. [1][2][3]
A mechanical pencil or clutch pencil is a pencil with a replaceable and mechanically extendable solid pigment core called a "lead" / ˈlɛd /. The lead, often made of graphite, is not bonded to the outer casing, and the user can mechanically extend it as its point is worn away from use. The vast majority of mechanical pencils have erasers.
Sampson Mordan (c. 1790 – 9 April 1843) was a British silversmith and a co-inventor of the first patented mechanical pencil. During his youth, he was an apprentice of the inventor and locksmith Joseph Bramah, who patented the first elastic ink reservoir for a fountain pen. In 1822, Mordan and his co-inventor John Isaac Hawkins filed the first ...
Video of a mechanical pencil sharpener, showing gearing and helical sharpening blades. A pencil sharpener (or pencil pointer, or in Ireland a parer or topper) [ 1 ] is a tool for sharpening a pencil 's writing point by shaving away its worn surface. Pencil sharpeners may be operated manually or by an electric motor.
Website. cross.com. A.T. Cross Company, LLC is an American manufacturing company of writing implements, based in Providence, Rhode Island. Founded in 1846, it is one of the oldest pen manufacturers in the world. Cross' products include fountain, ballpoint, and rollerball pens, mechanical pencils and refills.
The mechanical pencil (1822); the rights were sold to Sampson Mordan and Gabriel Riddle. [38] Trifocal corrective eyeglass lenses, patented in 1827, also coining the name "bifocal" for the dual focal length lenses invented by Benjamin Franklin [39] [40] Sugar refining, by the method of Edward Charles Howard for whom he had worked. [41]
founder of Sharp Corporation, inventor of the Ever-Ready Sharp Pencil. Tokuji Hayakawa (早川 徳次, Hayakawa Tokuji, November 3, 1893 – June 24, 1980) was a Japanese businessman and the founder of Hayakawa Kinzoku Kōgyō (the present-day Sharp Corporation ). He invented and patented the “Tokubijō” belt buckle in 1912 (a belt which ...
Eversharp is an American brand of writing implements founded by Charles Rood Keeran in 1913 and marketed by Keeran & Co., based in Chicago. [1] Keeran commercialised Eversharp mechanical pencils (manufactured by two companies, Heath and Wahl), [2] [1] then expanding to fountain pens when the company was acquired by the Wahl Adding Machine Co. in 1916 and it was named "Wahl-Eversharp".
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