Ads
related to: first mechanical pencil
Search results
Results From The WOW.Com Content Network
Detail of the first patent for a mechanical pencil. Sampson Mordan, 1822. Conrad Gessner described a lead holder pencil in 1565, but the lead had to be manually adjusted to sharpen it. [2] The earliest extant datable example of a mechanical pencil was found aboard the wreckage of HMS Pandora, which sank in 1791. [3]
He became renowned for further development of the mechanical pencil (1906) [4] - then called an "automatic pencil" - and the first solid-ink fountain pen (1907). [5] On 24 January 1906 he registered the patent for an automatic pencil.
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.
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]
In 1939, the company produced bat shaped mechanical pencils to celebrate the one hundredth anniversary of baseball. [2] In 1931, the company built a manufacturing plant on Houston Street in Atlanta. [3] During World War II Scripto became part of the war effort. At first, the company polished 75mm brass cannon shells. It then received a contract ...
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.