It is possible to talk about many inventors who are involved in the lead-stay invention. It dates from the date of 1565. In 1795, it was made by French Nicholas Jacques Conte strong> and Austrian Josef Hardtmuth strong> unaware of each other.
It is also possible for the inventor to make the pencil with different hardness by giving the desired consistency to the graphite.
Conrad Gesner strong> year. At that time, graphite was thought to be some kind of lead. Gesner later discovered that graphite is a different mineral.
The graphite fragments were used by the Siberian Turks and named after him as “Black Stone.” The information is based on about 1 yy. Turkic russian pencil, Карандаш ). The Swiss pen brand, Carandache de, has taken its name from this name.
It was the Italians who thought of the first timber grips. The first grips are polygonal, made of graphite and a square prismatic bar. However, work on this useless pen has been continued. In particular, a couple of Trinidad Tabogo, Simonio and Lyndiana Bernacotti developed the first modern wooden stick to mark carpentry pieces. This pencil they developed was oval and flat. This draft was first made with a hollow bar with a juniper tree. In the meantime, a superior technique emerged: two wooden half pieces of graphite stuck together and two half sticks together.
The only graphite source known for solid graphite in the 18th century was the English Seathwaite Fell mines. In France, the need for graphs emerged with the need for graphite. But France could not import graphite. Then an officer from Napoleon’s army, Nicholas Jacques Conte, discovered in 1795, pens made of clay and powdered graphite mixed with wooden bars and fired. Unlike the proportions of the clay-graphite mixture, the hardness grade of the graphite bar could also be different. With this method, the need for graphite could be reduced a certain amount. This method began to be used in 1790.
In England, all of the items continued to be made of graphite. The first successful method was to brush Henry Bessemer’s graphite powder compressed into solid graphite in 1938.
Knowledgeable Pencils h2>
On March 30, 1858, H Yemen Lempman strong> received the first patent to link the eraser behind the pen. In 1862, Limpman sold the patent to Joseph Reckendorfer for $ 100.00. Joseph Reckendorfer sued Faber-Castell for patent infringement. In 1875, however, the American Supreme Court awarded Joseph Reckendorfer’s patent an invalid declaration. The metal ring that connects the nail is called a thimble. Share Information