A chain is a series of connected links which are typically made of metal. A chain may consist of two or more links.
Those designed for lifting, such as when used with a hoist; for pulling; or for securing, such as with a bicycle lock, have links that are torus shaped, which make the chain flexible in two dimensions (The fixed third dimension being a chain's length.)
Those designed for transferring power in machines have links designed to mesh with the teeth of the sprockets of the machine, and are flexible in only one dimension. They are known as roller chains, though there are also non-roller chains such as block chain.
Two distinct chains can be connected using a quick link which resembles a carabiner with a screw close rather than a latch.
Uses for chain
Uses for chain include:
Chain of office, collar or heavy gold chain worn as insignia of office or a mark of fealty in medieval Europe and the United Kingdom
Decorating clothing, some people wear wallets with chains connected to their belts, or pants decorated with chains
In mathematics, a linear order, total order, simple order, or (non-strict) ordering is a binary relation on some setX, which is transitive, antisymmetric, and total (this relation is denoted here by infix ≤). A set paired with a total order is called a totally ordered set, a linearly ordered set, a simply ordered set, or a chain.
If X is totally ordered under ≤, then the following statements hold for all a, b and c in X:
Antisymmetry eliminates uncertain cases when both a precedes b and b precedes a. A relation having the property of "totality" means that any pair of elements in the set of the relation are comparable under the relation. This also means that the set can be diagrammed as a line of elements, giving it the name linear.Totality also implies reflexivity, i.e., a ≤ a. Therefore, a total order is also a partial order. The partial order has a weaker form of the third condition. (It requires only reflexivity, not totality.) An extension of a given partial order to a total order is called a linear extension of that partial order.
A chain (ch) is a unit of length. It measures 66 feet, or 22 yards, or 100 links, or 4 rods (20.1168 m). There are 10 chains in a furlong, and 80 chains in one statute mile. An acre is the area of 10 square chains (that is, an area of one chain by one furlong). The chain has been used for several centuries in Britain and in some other countries influenced by British practice.
By extension, chainage (running distance) is the distance along a curved or straight survey line from a fixed commencing point, as given by an odometer.
The chain was commonly used with the mile to indicate land distances and in particular in surveying land for legal and commercial purposes. Starting in the 19th centary, the chain was used as a sub division with the mile to show distances between railway stations, tunnels and bridges. In medieval times, local measures were commonly used, and many units were adopted that gave manageable units; for example the distance from London to York could be quoted in inches, but the resulting huge number would be unmemorable. The locally used units were often inconsistent from place to place.
+Text Size. SmallMediumLarge. ARTICLES. Rajasthan. 17-year-old girl hangs self in Ajmer. Two chain-snatchers held in Ajmer. From surround sound audio to mesmerizing video. Everything about the Samsung NEOQLED TV that will make your Diwali LIT! ... AJMER ... .
Two chain-snatchers held in Ajmer... The Dargah police on Thursday arrested two more chain-snatchers, including a woman. Recently, the police had arrested 30-year-old Mamata from Alwar for allegedly snatching chains from women devotees visiting the Ajmer Sharif Dargah.
+Text Size. SmallMediumLarge. ARTICLES. Rajasthan. 7 NSUI workers arrested for creating ruckus at BJP office in Jaipur. Two chain-snatchers held in Ajmer. From surround sound audio to mesmerizing video. Everything about the Samsung NEOQLED TV that will make your Diwali LIT!. Rajasthan. RTDC official suspended, MD transferred in Jaisamand hotel lease case ... .
56-year-old chain snatcher arrested ... The Peelamedu investigation wing police arrested a chain snatcher on Tuesday and recovered a gold chain weighing two sovereigns from him ... The officer said Duraisamy was already facing four chain snatching cases.
+Text Size. SmallMediumLarge. ARTICLES. Shop owner nabs burglar with help of CCTV footage. 56-year-old chain snatcher arrested. NVIDIAGTC 2021 - the most awaited conference for AI innovators, technologists, and creators to showcase the latest technology developments. Father-son duo imprisoned for murdering homeless man. Coimbatore...Start a Conversation ... .
+Text Size. SmallMediumLarge. ARTICLES. 5 British-era post offices continue to serve city. Crowded commercial areas a concern for health officials. NVIDIAGTC 2021 - the most awaited conference for AI innovators, technologists, and creators to showcase the latest technology developments. 56-year-old chain snatcher arrested. Coimbatore... More Latest News. .
+Text Size. SmallMediumLarge. ARTICLES. Maharashtra. 2 held for raping four women after promising money. Mumbai...Baby penguin Oreo's birthday bash ... Maharashtra. Chain-snatcher nabbed in 4hrs. MUMBAI ... .
Usha V Nambiar, a resident of Zirakpur, was waiting for her son outside Ayappa temple in Sector 47, Chandigarh, when the snatcher ran away with her chain ... Snatchers struck once again on Friday, taking away a 56-year-old woman’s gold chain in Sector 47 and a teenager’s mobile phones in Kishangarh.
KADAPA ... The B.Tech drop-out initially was a burglar and a petty chain-snatcher ... He was involved in house-breaking, chain-snatching offences, cricket betting racket, sexual harassment and extortion ... ....