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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" / ˈ l ɛ d /. 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.
A science fair or engineering fair is an event hosted by a school that offers students the opportunity to experience the practices of science and engineering for themselves. In the United States, the Next Generation Science Standards makes experiencing the practices of science and engineering one of the three pillars of science education.
Lamy produces mechanical pencils. Some of the other Lamy designs exist in mechanical pencil form, such as the 2000 and the Safari. The Scribble, also designed by Hannes Wettstein, [ 12 ] is a large-bodied pencil with triangular shapes on the body to help the grip.
Hawkins was born 14 March 1772 at Taunton, Somerset, England, [1] the son of Joan Wilmington and her husband Isaac Hawkins, [2] a watchmaker. The father, Isaac Hawkins, would become a Wesleyan minister, but was expelled by John Wesley; and after moving the family to Moorfields in London he was a minister in the Swedenborgian movement, which John Isaac would also follow.
On 24 January 1906 he registered the patent for an automatic pencil. Collaborating with an entrepreneur by the name of Edmund Moster, he started the Penkala-Moster Company and built a pen-and-pencil factory that was one of the biggest in the world at the time. As the business grew, a second factory was set up in Berlin.
A pencil (/ ˈ p ɛ n s ə l / ⓘ) 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.
The wood pencil has been used for writing by the Soviet space programs from the start. It is simple with no moving parts, except for the sharpener. The mechanical pencil was used by NASA during Project Mercury, [11] and it remained one of the most used writing instrument up through the Gemini, Apollo, and Skylab programs. [12]
At the 1889 World Fair in Paris, the Hardtmuths displayed their pencils rebranded as "Koh-I-Noor Hardtmuth". Each pencil was encased in a yellow cedar -wood barrel. The inspiration for the name was the Koh-i-Noor diamond (Persian for "Mountain of Light"), part of the Crown Jewels of the United Kingdom, and the largest diamond in the world at ...