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A mechanical pencil or clutch pencil is a pencil with a ... An advanced ratchet type has a mechanism that rotates the pencil lead 9 degrees counter-clockwise every ...
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.
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.
A carrier connects the centers of the two gears and rotates, to carry the planet gear(s) around the sun gear. The planet and sun gears mesh so that their pitch circles roll without slip. If the sun gear is held fixed, then a point on the pitch circle of the planet gear traces an epicycloid curve.
That same year Rotring launched its first drawing board, and the "Tikky" mechanical pencil was released in 1979. The "Art Pen", a fountain pen suitable for calligraphy, was launched in 1984. During the decade, Rotring set new subsidiaries in other European countries, while the "600" mechanical pencil was introduced in 1989.
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.