 A hand-spun pencil sharpener. A pencil sharpener (also referred to as pencil parer) is a device for sharpening a pencil's point by shaving one end. Pencil sharpeners exist in both electric and hand-powered forms. Picture of a pencil sharpener from http://www. ...
This article is about the handwriting instument. ...
History
 A wall-mounted pencil sharpener (casing removed to reveal the mechanism) Pencils were in use before the development of devices specifically to sharpen them. Previously, they were sharpened by shaving with a knife. Pencil sharpeners made this task much easier and gave a more uniform result. Some specialized types, such as a Carpenter's Pencil are still usually sharpened with a knife, due to their flat shape, though recently a fixed-blade device with a rotatable collar has become available. Image File history File linksMetadata Download high-resolution version (3812x1396, 407 KB) I TOOK THIS PIC. File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ...
Image File history File linksMetadata Download high-resolution version (3812x1396, 407 KB) I TOOK THIS PIC. File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ...
This article or section does not adequately cite its references or sources. ...
This article is about the handwriting instument. ...
Bernard Lassimone, a French mathematician, applied for the first patent (French patent #2444) on pencil sharpeners, in 1848. In 1867, Therry des Estwaux invented the manual pencil sharpener. Although John Lee Love invented the portable sharpener originally made for artists. One source claims that the Hammacher Schlemmer Company of New York offered the world's first electric pencil sharpener, as designed by Raymond Loewy, sometime in the early 1940s. (Source - about.com) Leonhard Euler is considered by many to be one of the greatest mathematicians of all time A mathematician is the person whose primary area of study and research is the field of mathematics. ...
Year 1848 (MDCCCXLVIII) was a leap year starting on Saturday (link will display the full calendar) of the Gregorian Calendar (or a leap year starting on Monday of the 12-day slower Julian calendar). ...
Cunt BAg Twat Fuk suck my penis ring 0778851865!!!!!!Year 1867 (MDCCCLXVII) was a common year starting on Tuesday (link will display the full calendar) of the Gregorian calendar (or a common year starting on Thursday of the of the 12-day slower Julian calendar). ...
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NY redirects here. ...
Raymond Loewy standing on one of his designs, the Pennsylvania Railroads S1 steam locomotive. ...
The 1940s decade ran from 1940 to 1949. ...
Mechanical sharpeners A mechanical pencil sharpener is hand-powered.
A common, portable variety is usually small, about 1 inch (2.5 cm) in size, and has no moving parts though this is not always so. One inserts the tip of the pencil into one of the holes, and twists the sharpener or the pencil while holding the other motionless. A blade inside the sharpener shaves the wood of the pencil, thus sharpening the tip. Such sharpeners can be bare or enclosed in a container to collect the shavings. The base of such a sharpener is often made of aluminium, magnesium (presumably to prevent an iron or steel blade from rusting), or hard plastic. General Name, Symbol, Number aluminium, Al, 13 Chemical series poor metals Group, Period, Block 13, 3, p Appearance silvery Atomic mass 26. ...
General Name, Symbol, Number magnesium, Mg, 12 Chemical series alkaline earth metals Group, Period, Block 2, 3, s Appearance silvery white Atomic mass 24. ...
This article or section does not adequately cite its references or sources. ...
There are also larger stationary mechanical sharpeners, powered by a crank. These are often screwed or bolted to a wall or desk. One inserts the pencil into the opening with one hand and turns the crank with the other. This rotates a set of cylindrical burrs in the mechanism, set at an angle to each other; this quickly sharpens the pencil. The casing of the sharpener is a repository for the pencil shavings; it needs to be emptied periodically. This type of mechanism was long the standard in offices, schools, and libraries before electric sharpeners became common, and these sturdy devices are still found. A crank is a bent portion of an axle, or shaft, or an arm keyed at right angles to the end of a shaft, by which motion is imparted to or received from it; also used to change circular into reciprocating motion, or reciprocating into circular motion. ...
Students in Rome, Italy. ...
Julio Pérez Ferrero Library - Cúcuta, Colombia A modern-style library in Chambéry A library is a collection of information resources and services, organized for use, and maintained by a public body, institution, or private individual. ...
Electric sharpeners
 Battery-operated sharpener Electric pencil sharpeners work on the same principle as mechanical ones, but the blade is rotated rapidly by an electric motor. Some electric pencil sharpeners are powered by batteries, rather than by electrical plugs, making them more portable. Battery-operated pencil sharpener Taken by Ellen Levy Finch (Elf | Talk) Feb 16, 2004. ...
Battery-operated pencil sharpener Taken by Ellen Levy Finch (Elf | Talk) Feb 16, 2004. ...
Rotating magnetic field as a sum of magnetic vectors from 3 phase coils An electric motor converts electrical energy into mechanical energy. ...
For other uses, see battery (disambiguation). ...
Specialized pencil sharpeners Specialized sharpeners are available that operate on non-standard sizes of pencil, such as large art pencils used in primary schools and carpenters' rectangular pencils. Some mechanical sharpeners have a large hole with a rotating disk in front of it that has several holes of different sizes.
Sharpeners of similar design for use on wax crayons are also available, and often included in boxes of crayons. These often have plastic blades for the softer wax. Crayola brand crayons A crayon is a stick of colored wax, charcoal, chalk, or other material used for writing and drawing. ...
 A hand-cranked pencil sharpener Since mechanical pencils dispense the graphite stick progressively as it is used, they do not require sharpening and are usually made of some unsharpenable material such as plastic or metal. Such pencils are sometimes called "self-sharpening pencils." However, prolonged writing periods often cause one side of the graphite to become lopsided and dull. Specialized versions of "pencil sharpener", known as graphite pointers are available for drafters or other mechanical pencil users that demand constantly-sharp points. Hand cranked pencil sharpener, cropped and converted from gif to jpg from plainlanguage. ...
Hand cranked pencil sharpener, cropped and converted from gif to jpg from plainlanguage. ...
A ratchet-type mechanical pencil A mechanical pencil, lead pencil or clicky pencil (usually called a propelling pencil in British English; other names include clutch pencil*, or Pacer after a Papermate model, a genericized trademark) is a pencil containing an internal mechanism which pushes (propels) the thin graphite lead through...
It has been suggested that this article or section be merged into Technical drawing. ...
There exist knives designed for pencil-sharpening, though they are used rarely in the United States. They resemble narrow razor blades.
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