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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 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 consistent, sharp point. If a finer or broader line is needed, a separate mechanical pencil using a lead with a different diameter is required.
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 .
Lead pencil may refer to: Pencil , a writing implement or art medium usually constructed of a narrow, solid pigment core inside a protective casing Mechanical pencil , a pencil with mechanically extendable solid pigment core called a lead
Lead for mechanical pencils Flexible pencils. Mechanical pencils use mechanical methods to push lead through a hole at the end. These can be divided into two groups: with propelling pencils an internal mechanism is employed to push the lead out from an internal compartment, while clutch pencils merely hold the lead in place (the lead is ...
Pencils are commonly used at polling stations instead of pens. This is because ink might run on to different sections of the ballot and obscure the voter’s choice. The Facts.