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Crowbar (tool)

 
Crowbar (tool)

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Crowbar (tool)



 
 
A crowbar, pry bar, or prybar, more informally a jimmy, jimmy bar, jemmy (British Isles
British Isles

The British Isles are a group of islands off the northwest coast of continental Europe that include Great Britain and Ireland, and numerous smaller islands....
) or gooseneck is a tool
Tool

A broad definition of a tool is an entity used to interface between two or more domains that facilitates more effective action of one domain upon the other....
 consisting of a metal
Metal

In chemistry, a metal is a chemical element whose atoms readily lose electrons to form positive ions , and form metallic bonds between other metal atoms and ionic bonds between nonmetal atoms....
 bar with a single curved end and flattened points, often with a small fissure on one or both ends for removing nails
Nail (engineering)

In engineering, woodworking and construction, a nail is a Pin -shaped, sharp object of hard metal, typically steel, used as a fastener. Nails for specialized purposes may also be made of stainless steel, brass or aluminium....
.






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Piedbiche
A crowbar, pry bar, or prybar, more informally a jimmy, jimmy bar, jemmy (British Isles
British Isles

The British Isles are a group of islands off the northwest coast of continental Europe that include Great Britain and Ireland, and numerous smaller islands....
) or gooseneck is a tool
Tool

A broad definition of a tool is an entity used to interface between two or more domains that facilitates more effective action of one domain upon the other....
 consisting of a metal
Metal

In chemistry, a metal is a chemical element whose atoms readily lose electrons to form positive ions , and form metallic bonds between other metal atoms and ionic bonds between nonmetal atoms....
 bar with a single curved end and flattened points, often with a small fissure on one or both ends for removing nails
Nail (engineering)

In engineering, woodworking and construction, a nail is a Pin -shaped, sharp object of hard metal, typically steel, used as a fastener. Nails for specialized purposes may also be made of stainless steel, brass or aluminium....
. In the British Isles
British Isles

The British Isles are a group of islands off the northwest coast of continental Europe that include Great Britain and Ireland, and numerous smaller islands....
, "crowbar" may be used loosely for this tool, but is more commonly used to mean a larger straight tool (see spud bar
Spud bar

A spud bar is a long straight metal bar used lengthwise as a hand tool to deliver blows to a target, causing the target to move, break up or deform....
). The term "jemmy" or "jimmy" most often refers to the tool when used for burglary
Burglary

Burglary is a crime the essence of which is entry into a building for the purposes of committing an offence. Usually that offence will be theft, but most jurisdictions specify others which fall within the ambit of burglary....
. Wrecking bar is the most common name for the bar with the curved end. Jimmy for the smaller version.

It is used as a lever
Lever

In physics, a lever is a rigid object that is used with an appropriate fulcrum or wiktionary:pivot point to multiply the mechanical force that can be applied to another object....
 to either force apart two objects or to remove nails. Crowbars are commonly used to open nailed wood
Wood

Wood is an organic material; in the strict sense wood is produced as secondary xylem in the stems of woody plants, notably trees but also shrubs, etc....
en box
Box

Box describes a variety of containers and receptacles. When no specific shape is described, a typical Rectangle box may be expected. Nevertheless, a box may have a horizontal cross section that is square , elongated, circle or oval; sloped or domed top surfaces, or non-vertical sides....
es. Another common use for larger crowbars is general demolition: for removing nails, prying apart boards, and generally smashing things.

Crowbars can be used as any of the three lever classes
Lever

In physics, a lever is a rigid object that is used with an appropriate fulcrum or wiktionary:pivot point to multiply the mechanical force that can be applied to another object....
 but the curved end is usually used as a first-class lever, and the flat end as a 2nd class lever.

Materials and construction

Normally made of medium carbon steel
Steel

Steel is an alloy consisting mostly of iron, with a carbon content between 0.2% and 2.14% by weight , depending on grade. Carbon is the most cost-effective alloying material for iron, but various other alloying elements are used such as manganese, chromium, vanadium, and tungsten....
, they can be made from titanium
Titanium

Titanium is a chemical element with the symbol Ti and atomic number 22. Sometimes called the ?space age metal?, it has a low density and is a strong, lustrous, corrosion-resistant transition metal with a silver colour....
 also, which has the advantage of being lighter, nonmagnetic, and spark-resistant.

The least expensive, most common crowbars are forged from hexagonal or sometimes cylindrical stock. More advanced, expensive designs often are forged with an I shaped cross sectional shaft similar to an I-beam
I-beam

I-beams are beam with an I- or H-shaped cross section . The horizontal elements are flanges, while the vertical element is the web....
.

Etymology


The term crowbar is named after its resemblance to the feet or beak of a crow
Crow

The true crows are large passerine birds that form the genus Corvus in the family Corvidae. Ranging in size from the relatively small dove-sized jackdaws to the Common Raven of the Holarctic region and Thick-billed Raven of the highlands of Ethiopia, the 40 or so members of this genus occur on all temperate continents and several offsh...
, with a history that traces to at least 1400. They were first called crow bars and later the two joined into one word. They also were called crows; William Shakespeare
William Shakespeare

William Shakespeare was an English people poet and playwright, widely regarded as the greatest writer in the English language and the world's preeminent dramatist....
 used the term crow in many places, including his play Romeo and Juliet
Romeo and Juliet

Romeo and Juliet is a Shakespearean tragedy written early in the career of playwright William Shakespeare about two young "Star-crossed" whose untimely deaths ultimately unite their feuding families....
, Act 5, scene ii:
Get me an iron crow and bring it straight.
Unto my cell. ...


One false etymology
False etymology

A false etymology is an assumed or postulated etymology that current consensus among scholars of historical linguistics holds to be incorrect. Many false etymologies may also be described as folk etymologies, the distinction being that folk etymologies are widely believed to be true, and of anonymous origin....
 is that the term crowbar derives from Jim Crow
Jim Crow laws

The Jim Crow laws were state and local laws in the United States enacted between 1876 and 1965. They mandated de jure Racial segregation in the United States in all public facilities, with a "separate but equal" status for black Americans and members of other non-white racial groups....
 and that they were used by blacks to perform menial tasks, giving it racist origins. Jim Crow was alive at least 400 years after the origin of the crowbar, so it is highly unlikely that he had anything to do with its name. This has been discredited by Snopes.

Video Game Culture

The crowbar has become something of symbol in video game culture thanks to the success of the Half-Life series
Half-Life series

Half-Life is a science fiction first-person shooter computer game series which consists of two full games, two episodic games, and three third-party made expansions, as well as a number of demos featuring exclusive content....
 developed by Valve Corporation
Valve Corporation

Valve Corporation is an United States video game developer company based in Bellevue, Washington, USA that was founded in 1996, and made famous by its first product, Half-Life , which was released in November 1998....
. The crowbar has come to symbolize the series protagonist, Gordon Freeman
Gordon Freeman

Gordon Freeman is a fictional character, the main protagonist of the Half-Life video game series.A theoretical physicist working at the Black Mesa Research Facility, Gordon is involved in an experiment which accidentally opens an interdimensional portal, releasing confused, hostile beings into the complex....
, as the first weapon he picks up is a crowbar; he is nearly always pictured with a crowbar in hand. A single image of a crowbar was used as a magazine advertisement when the release of Half-Life 2
Half-Life 2

Half-Life 2 is a science fiction first-person shooter Video game and the sequel to the highly acclaimed Half-Life . It was developed by Valve Corporation and was released on November 16, 2004, following a protracted five-year, $40 million development cycle during which the game?s source code was leaked to the Internet....
 was impending in 2004. The crowbar has so far been featured in every game in the Half-Life series
Half-Life series

Half-Life is a science fiction first-person shooter computer game series which consists of two full games, two episodic games, and three third-party made expansions, as well as a number of demos featuring exclusive content....
 except Half-Life: Opposing Force
Half-Life: Opposing Force

Half-Life: Opposing Force is an expansion pack for Valve Corporation science fiction first-person shooter video game Half-Life . The game was developed by Gearbox Software and published by Sierra Entertainment on November 1, 1999....
, where Corporal Adrian Shephard
Adrian Shephard

Corporal Adrian Shephard is the silent player character and protagonist in Half-Life: Opposing Force, the first expansion pack, by Gearbox Software, for the first-person shooter Video game Half-Life ....
 uses a wrench. A crowbar is also used as a weapon in the Deus Ex
Deus Ex

Deus Ex is a cyberpunk-themed action role-playing game developed by Ion Storm Inc. and published by Eidos Interactive in the year 2000, which combines gameplay elements of first-person shooters with those of computer role-playing game....
 series.

At the beginning of Bioshock
Bioshock

BioShock is a first-person shooter video game, developed by 2K Boston/2K Australia?previously known as Irrational Games?designed by Ken Levine....
, the character "Atlas" suggests that the player find a weapon "like a crowbar or something." The player soon finds a wrench.