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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.
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][4][5]
John Isaac Hawkins (1772–1855) was an inventor who practised civil engineering. He was known as the co-inventor of the ever-pointed pencil, an early mechanical pencil , and of the upright piano. Early life
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 ...
However, he sold off his company, White Crown Fruit Jar, in order to finance his favorite invention: the Eversharp mechanical pencil. Around 1914, Keeran invented the basic mechanism for the Eversharp , thought up the "Eversharp" trademark (inspired by the Winchester Rifle logo), and set up a company to make and sell Eversharp pencils.
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.
Ferrule. Eraser. A pencil (/ ˈpɛnsəl / ⓘ) is a writing or drawing implement with a solid pigment core in a protective casing that reduces the risk of core breakage and keeps it from marking the user's hand. Pencils create marks by physical abrasion, leaving a trail of solid core material that adheres to a sheet of paper or other surface.
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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