Who created the pencil sharpener?
John Lee Love
John Lee Love (?-1931) John Lee Love was an African American inventor, most known for his invention of the hand-cranked pencil sharpener, the “Love Sharpener,” and an improved plasterer’s hawk.
How long has the pencil sharpener been around?
1828
In 1828, French mathematician Bernard Lassimonne patented the first pencil sharpener. This sharpener had small metal files set at 90 degrees in a block of wood and it grinded the edges of the pencil’s tip. This method wasn’t any faster or easier than sharpening with a knife, so it didn’t become popular.
Where did the invention of the pencil sharpener come from?
The development of pencil sharpeners began in France. In a French book from 1822 was reported in detail about an invention of Mr. C. A. Boucher (Paris) for construction of a pencil sharpener. He was working with pantographs and apparently needed a device to precisely sharpen the pencils.
What are the different types of pencil sharpeners?
Today we have different types of pencil sharpeners. “Prism”, “manual” or “pocket” sharpeners are the simplest and the oldest variant. They have a conical hole that leads to the blade whose sharp edge just enters the shaping cone.
What’s the best way to sharpen a pencil?
Hold the pencil firmly in one hand and make sure the tip is pointing away from you. Use slow and certain strokes in an outward direction to sharpen the pencil. You can also use a special carpenter’s pencil sharpener. Insert the pencil into the hole, and slide it back and forth against the blade of the pencil sharpener. Try an X-Acto knife.
Why does my pencil break when I use a sharpener?
However, because pencils may have different standard diameters in different nations, imported sharpeners may have non-standard-sized alignment guide-holes, making sharpening attempts difficult. If the alignment hole is too small, the pencil cannot be inserted, while if it is too large, the tip of the pencil repeatedly will break off.