Raymond Lowery invented the electric pencil sharpener in the early 1940's. In an electrical pencil sharpener, the cylindrical cutter is rotated by an electric motor.
An electric pencil sharpener works by means of a small electric motor. The motor rotates the blades, sharpening the pencil.?æ
it is still used today by just sharpening it by hand with a plastic sharpener with a metal blade it in and some of them now are electric and can just put the pencil in the hole and it sharpens by using electricity
the basic Boston pencil sharpeners are really very simple you have a pretty much simple ring and pinion system the pinion (motor)spins at 15 revolutions to 1 revolution of the ring (sharpener) to turn said sharpener
The School Smart Vertical Pencil Sharpener is considered the best electric sharpener available. It has Helical steel blades and an auto-stop mechanism for the ideal tip.
usually pencil sharpeners are made of plastic and metal.
staples.
You have to take apart the pencil sharpener (once unplugged), or you can go to a repair shop to let an employee fix it for you.
You can buy electric pencil sharpener at Ebay or Amazon online. The product include shipping fee rates depending on your current location. The electric pencil sharpeners has different colors and shapes.
world's first electric pencil sharpener designed by Raymond Loewy
Bernard Lassimone, a French mathematician, invented the standard manual pencil sharpener in 1828. In 1847, Therry des Estwaux invented an improved mechanical sharpener.
Electric pencil sharpener can be found in stores such as Office Depot, Staples, Office Max and Walmart. It can be also purchased on-line on websites such as Amazon or eBay.