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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 pencil using this system is also commonly known as a "shaker pencil". A small, metal weight lies around the core of the pencil, and when shaken, slides up and down; thus pushing the lead advancer down and advancing more lead. For ergonomics, the Dr. Grip pencil was designed with a wide barrel and cushioned grip to relieve writing stress and ...
Mechanical pencils with thin diameter leads dispense the graphite lead progressively during use and thus do not require sharpening; such pencils are sometimes called "self-sharpening". A type of mechanical pencil has a rotating gear mechanism which rotates the lead slightly every time the lead is lifted off the paper, helping to maintain a ...
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 .
They built a new factory in Birmingham and took over Edward Baker Ltd, another pencil maker. [ 2 ] In 1988, the company was acquired by Filofax Group, [ 3 ] which owned it until 2015, when it was re-established itself as "Imperial Yard Ltd".
Its products include pens, erasers, glue, drawing materials, schoolbags, markers, highlighters, mechanical pencils, notebooks, correction fluid, oil pastels, sticky notes, pencil leads, and pen refills. The pens sold by the company include ballpoint, gel, and roller varieties. [4] Its annual business volume is about 2 billion renminbi. [3]