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A typical construction of a ratchet-based mechanical pencil. 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 ...
Video of a 1930s dotted-line drawing pen. Pencils in use are usually mechanical pencils with a standard lead thickness. The usual line widths are 0.35 mm, 0.5 mm, 0.7 mm and 1.0 mm. Hardness varies usually from HB to 2H. Softer lead gives a better contrast, but harder lead gives a more accurate line. Bad contrast of the lead line in general is ...
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 ...
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Etch A Sketch is a mechanical drawing toy invented by André Cassagnes of France and subsequently manufactured by the Ohio Art Company. [1] It is now owned by Spin Master of Toronto, Ontario, Canada. An Etch A Sketch has a thick, flat gray screen in a red plastic frame. There are two white knobs on the front of the frame in the lower corners.
Staedtler SE (German pronunciation: [ˈʃtɛtlɐ]) is a German multinational stationery manufacturing company based in Nuremberg.The firm was founded by J.S. Staedtler (1800–1872) in 1835 and produces a large variety of stationery products, such as writing implements (including technical drawing instruments), [1] art materials, and office supplies.
The graphite in mechanical pencils is typically much narrower than in wooden pencils, frequently in sub-millimeter diameters. This makes them particularly useful for fine diagrams or small handwriting, although different sizes of refill leads cannot be interchanged in the same pencil unless it has been specially designed for that purpose.
Nicolas-Jacques Conté (French pronunciation: [nikɔla ʒak kɔ̃te]; 4 August 1755 – 6 December 1805) was a French inventor of the modern pencil. [1]He was born at Saint-Céneri-près-Sées (now Aunou-sur-Orne) in Normandy and distinguished himself for his mechanical genius, which was of great avail to the French army in Egypt.