pencilsharpener

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.

So-called “prism” sharpeners, also called “manual” or “pocket” sharpeners in the United States, have no separate moving parts and are typically the smallest and cheapest commonly used pencil sharpener on the market. The simplest common variety is a small rectangular prism or block, only about 1 × 5/8 × 7/16 inch (2.5 × 1.7 × 1.1 cm) in size