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.
It looked like a scene from a movie when recently on the streets of Sector 11, Rohini, a policeman jumped from his bike to grab a chain snatcher trying to run away ... Narrating the incident like a movie script, he goes on, “Jab maine uske bike pe jump kiya toh mind mein bass ek baat thi ki kisi tarah se iss snatcher ko rokna hai.
Ghaziabad...Police said that the proposed cameras will be helpful in tracking stolen vehicles, movement of criminals and snatchers, besides tracking traffic violations on NH-9 ... “These cameras will help us track criminals, including chain snatchers and car robbers who flee to the nearby districts ... ....
A 22-year-old man was arrested on Friday in connection with three chain snatching cases ... According to the officer, Ranjithkumar was also involved in chain snatching cases at Karamadai and Annur police station limits.
A video of a Delhi cop catching a fleeing chain snatcher is going viral on social media. In the viral video, Delhi Police constable Satyendra hatched a snatcher who was fleeing after stealing a woman's necklace ... .
A Delhi police constable single-handedly nabbed a wanted chain-snatcher who has 11 cases against him ... Constable Satyendra grabs the chain snatcher at the exact moment he passes by him as the criminal tries hard to escape the policeman's grip ... With the arrest of this snatcher, 11 cases were solved.
Meanwhile, Trichy city police have launched an investigation into the incident in which a woman’s chain was snatched in front of her house at on VayalurRoad in Trichy on Wednesday ... As she was about to enter her house, an unknown man barged into the gate and snatched her gold chain. The woman managed to catch hold of her chain.
Vehicular movement will be affected on the Ring Road between Rajouri Garden and Punjabi Bagh in Delhi for around 11 months due to construction of an elevated road, police said on Thursday ... Also Read ... Traffic Advisory ... Brave Delhi police constable nabs wanted chain-snatcher ... ....
Two snatchers involved in a gold chain snatching in Sector-14, Panchkula, landed in police net on Thursday. The accused were identified as Aarif Khan and Shdaab Khan, both natives of Saharanpur, Uttar Pradesh, and residents of Zirakpur. They had snatched the chain from a Panchkula resident on July 28. They have been sent to two-day police remand. HTC.
More On. assaults. Fast food worker, 19, loses eye protecting special needs boy from bully. NYPD traffic agent attacked after issuing ticket in Brooklyn. Fired captain accused of kicking shackled prisoner wins Vermont sheriff’s race. Queens girl, 12, calls moped chain snatchers ‘the worst human beings alive’ ... ....
More On. robbery. Armed crew robs man of BMW at gunpoint in Midtown, go on joyride. cops. NYC car thief slams into dumpster, needs police rescue. Armed robbers steal $72K in jewelry outside Diamond District store. cops. Queens girl, 12, calls moped chain snatchers ‘the worst human beings alive’ ... Don’t Say Anything ...Greene County Jai ... ....