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Blade
A blade is the portion of a tool, weapon, or machine with an edge that is designed to puncture, chop, slice or scrape surfaces or materials. Blades are typically made from materials that are harder than those they are to be used on. Historically, humans have made blades from flaking stones such as flint or obsidian, and from various metal such as copper, bronze and iron. Modern blades are often made of steel or ceramic. Blades are one of humanity's oldest tools, and continue to be used for combat, food preparation, and other purposes. Blades work by concentrating force on the cutting edge. Certain blades, such as those used on bread knives or saws, are serrated, further concentrating force on the point of each tooth. Uses During food preparation, knives are mainly used for slicing, chopping, and piercing. In combat, a blade may be used to slash or puncture, and may also be thrown or otherwise propelled. The function is to sever a nerve, muscle or tendon fibers, or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kitchen Knife
A kitchen knife is any knife that is intended to be used in food preparation. While much of this work can be accomplished with a few general-purpose knives – notably a large chef's knife, a tough cleaver, a small paring knife and some sort of serrated blade (such as a bread knife or serrated utility knife) – there are also many specialized knives that are designed for specific tasks. Kitchen knives can be made from several different materials. Construction Material * Carbon steel is an alloy of iron and carbon, often including other elements such as vanadium and manganese. Carbon steel commonly used in knives has around 1.0% carbon (ex. AISI 1095), is inexpensive, and holds its edge well. Carbon steel is normally easier to resharpen than many stainless steels, but is vulnerable to rust and stains. The blades should be cleaned, dried, and lubricated after each use. New carbon-steel knives may impart a metallic or "iron" flavour to acidic foods, though over time, the stee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kukri
The kukri () or khukuri ( ne, खुकुरी, ) is a type of machete with a distinct recurve in its blade. It serves multiple purposes as a melee weapon and also as a regular cutting tool throughout most of South Asia. The ''kukri'', ''khukri'', and ''kukkri'' spellings are of Indian English origin, with the original Nepalese English spelling being ''khukuri''. Originating from the Indian subcontinent, the kukri is the national weapon of Nepal, traditionally serving the role of a basic utility knife for the Nepali-speaking Gurkhas, and consequently is a characteristic weapon of the Nepali Army. There have been, and still are many myths surrounding the kukri since its earliest recorded use in the 7th century—most notably that a traditional custom revolves around the blade in which it must draw blood, owing to its sole purpose as a fighting weapon, before being sheathed. However, they are frequently used as regular utility tools. History Researchers trace the o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rapier
A rapier () or is a type of sword with a slender and sharply-pointed two-edged blade that was popular in Western Europe, both for civilian use (dueling and self-defense) and as a military side arm, throughout the 16th and 17th centuries. Important sources for rapier fencing include the Italian Bolognese group, with early representatives such as Antonio Manciolino and Achille Marozzo publishing in the 1530s, and reaching the peak of its popularity with writers of the early 1600s ( Salvator Fabris, Ridolfo Capo Ferro). In Spain, rapier fencing came to be known under the term of ("dexterity") in the second half of the 16th century, based on the theories of Jerónimo Sánchez de Carranza in his work ("The Philosophy of Arms and of their Dexterity and of Aggression and the Christian Defence"), published in 1569. The best known treatise of this tradition was published in French, by Girard Thibault, in 1630. The French small sword or court sword of the 18th century was a dire ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Talwar
The talwar (), also spelled ''talwaar'' and ''tulwar'', is a type of curved sword or sabre from the Indian subcontinent. Etymology and classification The word ''talwar'' originated from the Sanskrit word ''taravāri'' ( sa, तरवारि) which means "one-edged sword". It is the word for ''sword'' in several related languages, such as Hindustani (Urdu and Hindi), Nepali, Marathi, Gujarati, Punjabi, etc. and as () in Bengali. Like many swords from around the world with an etymology derived from a term meaning simply 'sword', the talwar has in scholarship, and in museum and collector usage, acquired a more specific meaning. Unfortunately, South Asian swords, while showing a rich diversity of forms, suffer from relatively poor dating (so developmental history is obscure) and a lack of precise nomenclature and classification. The typical talwar is a type of sabre, characterised by a curved blade (without the radical curve of some Persian swords), possessing an all-metal hil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ballistic Knife
A ballistic knife is a knife with a detachable blade that can be ejected to a distance of several meters/yards by pressing a trigger or operating a lever or switch on the handle.Crawford, Steve, ''Deadly fighting skills of the world'', New York: Thomas Dunne Books, St. Martin's Press, (1999), pp. 45-46: The minimum standard demanded of ''Spetsnaz'' recruits when throwing a knife from six feet is three consecutive hits on target; five hits is considered excellent. Spring-powered ballistic knives first appeared in books and press reports on Soviet and Eastern Bloc armed forces in the late 1970s. Commercially-produced ballistic knives briefly gained notoriety in the United States in the mid-1980s after they were marketed and sold in the United States and other Western countries. Since then, the marketing and sale of ballistic knives to civilians has been restricted or prohibited by law in several nations. Usage In its spring-propelled form, the blade of a ballistic knife is theor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Obsidian
Obsidian () is a naturally occurring volcanic glass formed when lava extruded from a volcano cools rapidly with minimal crystal growth. It is an igneous rock. Obsidian is produced from felsic lava, rich in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium. It is commonly found within the margins of rhyolitic lava flows known as obsidian flows. These flows have a high content of silica, granting them a high viscosity. The high viscosity inhibits diffusion of atoms through the lava, which inhibits the first step ( nucleation) in the formation of mineral crystals. Together with rapid cooling, this results in a natural glass forming from the lava. Obsidian is hard, brittle, and amorphous; it therefore fractures with sharp edges. In the past, it was used to manufacture cutting and piercing tools, and it has been used experimentally as surgical scalpel blades. Origin and properties The '' Natural History'' by the Roman writer Pliny the Elder inc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Falchion
A falchion (; Old French: ''fauchon''; Latin: ''falx'', "sickle") is a one-handed, single-edged sword of European origin. Falchions are found in different forms from around the 13th century up to and including the 16th century. In some versions, the falchion looks rather like the seax and later the sabre, and in other versions more like a machete with a crossguard. Types The blade designs of falchions varied widely across the continent and over time. They almost always included a single edge with a slight curve on the blade towards the point on the end and most were also affixed with a quilloned crossguard for the hilt in the manner of the contemporary arming swords. Unlike the double-edged swords of Europe, few actual swords of this type have survived to the present day; fewer than a dozen specimens are currently known. A number of weapons superficially similar to the falchion existed in Western Europe, including the Messer, hanger and the backsword. Two basic types of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grader
A grader, also commonly referred to as a road grader, motor grader, or simply a blade, is a form of heavy equipment with a long blade used to create a flat surface during grading. Although the earliest models were towed behind horses, and later tractors, most modern graders are self-propelled and thus technically "motor graders". Typical graders have three axles, with the steering wheels in front, followed by the grading blade, then a cab and engine atop tandem rear axles. Some graders also have front wheel drive for improved performance. Some graders have optional rear attachments, such as a ripper, scarifier, or compactor. A blade forward of the front axle may also be added. For snowplowing and some dirt grading operations, a main blade extension can also be mounted. Capacities range from a blade width of 2.50 to 7.30 m (8 to 24 ft) and engines from 93–373 kW (125–500 hp). Certain graders can operate multiple attachments, or be designed for specialized tasks l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scraper (archaeology)
In prehistoric archaeology, scrapers are unifacial tools thought to have been used for hideworking and woodworking. Many lithic analysts maintain that the only true scrapers are defined on the base of use-wear, and usually are those that were worked on the distal ends of blades—i.e., "end scrapers" (french: grattoir, link=no). Other scrapers include the so-called "side scrapers" or racloirs, which are made on the longest side of a flake, and notched scrapers, which have a cleft on either side that may have been used to attach them to something else. Scrapers are typically formed by chipping the end of a flake of stone in order to create one sharp side and to keep the rest of the sides dull to facilitate grasping it. Most scrapers are either circle or blade-like in shape. The working edges of scrapers tend to be convex, and many have trimmed and dulled lateral edges to facilitate hafting. One important variety of scraper is the thumbnail scraper, a scraper shaped much li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ceramic
A ceramic is any of the various hard, brittle, heat-resistant and corrosion-resistant materials made by shaping and then firing an inorganic, nonmetallic material, such as clay, at a high temperature. Common examples are earthenware, porcelain, and brick. The earliest ceramics made by humans were pottery objects (''pots,'' ''vessels or vases'') or figurines made from clay, either by itself or mixed with other materials like silica, hardened and sintered in fire. Later, ceramics were glazed and fired to create smooth, colored surfaces, decreasing porosity through the use of glassy, amorphous ceramic coatings on top of the crystalline ceramic substrates. Ceramics now include domestic, industrial and building products, as well as a wide range of materials developed for use in advanced ceramic engineering, such as in semiconductors. The word "''ceramic''" comes from the Greek word (), "of pottery" or "for pottery", from (), "potter's clay, tile, pottery". The earliest known ment ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Khopesh
The ''khopesh'' ('; also vocalized khepesh) is an Egyptian sickle-shaped sword that evolved from battle axes. Description A typical ''khopesh'' is 50–60 cm (20–24 inches) in length, though smaller examples also exist. The inside curve of the weapon could be used to trap an opponent's arm, or to pull an opponent's shield out of the way. These weapons changed from bronze to iron in the New Kingdom period. The earliest known depiction of a ''khopesh'' is from the Stele of the Vultures, depicting King Eannatum of Lagash wielding the weapon; this would date the ''khopesh'' to at least 2500 BC. The blade is only sharpened on the outside portion of the curved end. The ''khopesh'' evolved from the epsilon or similar crescent-shaped axes that were used in warfare. History The ''khopesh'' fell out of use around 1300 BC. However, on the 196 BC Rosetta Stone, it is referenced as the "sword" determinative in a hieroglyph block, with the spelled letters of kh, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cutting
Cutting is the separation or opening of a physical object, into two or more portions, through the application of an acutely directed force. Implements commonly used for wikt:cut, cutting are the knife and saw, or in medicine and science the scalpel and microtome. However, any sufficiently sharp object is capable of cutting if it has a hardness sufficiently larger than the object being cut, and if it is applied with sufficient force. Even liquids can be used to cut things when applied with sufficient force (see water jet cutter). Cutting is a compression (physical), compressive and shearing (physics), shearing phenomenon, and occurs only when the total stress (physics), stress generated by the cutting implement exceeds the ultimate Strength of materials, strength of the material of the object being cut. The simplest applicable equation is: \text = or \tau=\frac The stress generated by a cutting implement is directly proportional to the force with which it is applied, and in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
