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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]
Joseph Dixon (1799–1869) was an inventor, entrepreneur and the founder of what became the Dixon Ticonderoga Company, a well-known manufacturer of pencils in the United States. His fascination with new technologies led to many innovations such as a mirror for a camera that was the forerunner of the viewfinder , a patented double-crank steam ...
Hymen L. Lipman (c. 1817/1823 – November 4, 1893) is credited with registering the first patent for a pencil with an attached eraser on March 30, 1858 (U.S. patent 19,783). Hymen L. Lipman was born March 20, 1817, in either Kingston, Jamaica or in the Bahamas, to English parents.
The Dixon Ticonderoga Company (/ t aɪ k ɒ n d ə ˈ r oʊ ɡ ə /) is an American manufacturer of office and art supplies based in Heathrow, Florida.A subsidiary of Italian-based F.I.L.A. SpA, the company offers a number of brands, with one of the most well-known being Ticonderoga: the yellow No. HB 2 pencil known for its distinctive green and yellow ferrule.
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.
William Munroe (American soldier) (1742–1827), American soldier in the American Revolutionary War; William Munroe (pencil maker) (1778–1861), first American pencil maker; William Munroe (Scottish soldier) (1625–1719), Scottish soldier; William R. Munroe (1886–1966), United States Navy admiral
Silver mechanical pencil Catalogue from 1898. 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 1810, he invented an artificial pumice and years later, a version of stoneware which was used to make mortars, funnels, and other utensils. A flexible, unbreakable blackboard was also produced. In 1792, Hardtmuth established a pencil factory in Vienna after he succeeded in creating an artificial graphite pencil by mixing powdered graphite ...