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.
In separate incidents bike borne chain snatchers attacked three women in the district on Wednesday ... is Rosamma, 60, of Kodunganoor whose chain weighing 1.25 sovereigns was robbed by bike borne chain snatchers.TNN.
Woman robbed of 5-sovereign gold chain ... A 23-year-old grocery shop owner lost her five-sovereign gold chain to snatchers on Monday ... When she was trying to take a pack of snacks, the man snatched her five-sovereign gold chain ... But they could not nab the snatchers.
Earlier, they used to indulge in attention diversion cases but now they are focussing more on chain snatching ... There have been instances where the gang members introduce themselves as police in mufti who are trying to catch the chain snatchers ... Sources said that a 23-year-old chain snatcher had acquired the status of a numero uno chain snatcher.
The officials conducted search of the suspects and recovered 951 grams of gold in the form of dentures and a metallic chain ... B'luru Police nab chain snatchers, recover booty worth ₹12.5L ; solve over dozen cases [details].
Chain snatchers get three-year prison term ... A district munsif-cum-judicial magistrate court here on Wednesday sentenced two chain snatchers to three years in prison ... The chain snatchers were also slapped a ...
+Text Size. SmallMediumLarge. ARTICLES. Two more school students test positive for Covid-19. Doorstep vax drive for elderly, disabled. What’s hot in Gurugram’s commercial real estate? Shop-cum-Offices!. Chain snatchers get three-year prison term. Coimbatore... Among the new cases is a Class IX girl from the government higher secondary school at Arasur ... .
+Text Size. SmallMediumLarge. ARTICLES. Corpn engineers, town planning dept to stop building plan violations together. Doorstep vax drive for elderly, disabled. What’s hot in Gurugram’s commercial real estate? Shop-cum-Offices!. Chain snatchers get three-year prison term. Coimbatore...Engineering wing staff are expected to help them meet the requirements ... .
Chain snatchers have now gone a step ahead in their modus operandi in the city. In an unheard-of crime, a chain snatcher in Padra dared to commit his crime in broad daylight on Saturday by entering the house of woman and robbing her gold necklace worth Rs 1.4 lakh.
This year too, bike-borne chain snatchers continue to prowl in Ghaziabad with many of them using firearms during the crime ... A total of 291 incidents of chain/mobile snatching took place while 74 cases of loot were reported in the January 1-August 15 period ... “We have set up checkpoints and deployed police officers to nab the snatchers.
Officers from Pant Nagar police station went undercover and worked as waiter and manager of a fast-food joint at Andheri to arrest two Pydhonie residents who have been involved in more than seven chain-snatching cases in the eastern suburbs, over the past two years.