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.
The Karnataka Police have launched a manhunt for a biker who has been misbehaving with women cyclists in Bengaluru, police said on Monday ... She also told police that on May 25, a bike rider who came from behind touched her inappropriately near Mekhri Circle ... Gang of HIV-infected chain snatchers busted in Bengaluru; 90 sex workers under scanner ... .
The chain weighed nine sovereigns ...Villagers, including Anandhamuthukumar, and Rekha chased the chain snatcher ... Annavasal police inspector Chandrasekaran said on Wednesday the chain-snatcher was slapped with a case of murder and robbery.
The city police arrested five chain snatchers on Sunday morning from Sector 39 area ... They later revealed that they were part of a chain snatching gang and subsequently their accomplices were nabbed.
New Delhi... In a meeting, a senior police officer observed that the conversion rate of robbery calls into FIRs had fallen ... After 24 hours, chances are greater that the snatchers or robbers will dispose of the stolen goods.” ... In most cases, chains and mobile phones were snatched. “The snatchers usually go to a jeweller and get the chain melted ... .
NEW DELHI... In a meeting, a senior police officer observed that the conversion rate of robbery calls into FIRs had fallen ... After 24 hours, chances are greater that the snatchers or robbers will dispose of the stolen goods.” ... In most cases, chains and mobile phones were snatched. “The snatchers usually go to a jeweller and get the chain melted ... .
Dragging victims into fake incidents of road rage and then robbing them of their gold chains and mobile phones seems to be the new modus operandi of robbers with the Kasturba Marg and police teams cracking at least two such cases in the recent past and arresting 10 accused in the cases.
Dragging victims into fake incidents of road rage and then robbing them of their gold chains and mobile phones seems to be the new modus operandi of robbers with the Kasturba Marg and teams cracking at least two such cases in the recent past and arresting 10 accused in the cases.
Almost a week after a gold chain was snatched from a woman while she was on a morning walk with her husband in ... It becomes easy for snatchers to target the victim and snatch the chain from them. We have learned that the snatchers do a random recce and look for people wearing gold chains,” said a police officer.