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Chain. A common metal short-link chain. Roller chains. A chain is a serial assembly of connected pieces, called links, typically made of metal, with an overall character similar to that of a rope in that it is flexible and curved in compression but linear, rigid, and load-bearing in tension. A chain may consist of two or more links.
The basic type of coupling on railways following the British tradition is the buffer and chain coupling. A large chain of three links connects hooks on the adjoining wagons. These couplings followed earlier tramway practice but were made more regular. Buffers on the frame of the wagon absorbed impact loads, as the train overran a slowing ...
Cable ferries can be typified by their size and construction, their usage (passenger, animal, vehicle) and requirements (length of crossing, amount of other shipping), their cables (wire rope, chain, or both), and their propulsion (water current, engine, manual). The choice of cable depends partially on the requirements of the crossing but also ...
Chain boat. A chain boat, [1] [2] chain tug [3] or chain-ship [4] was a type of river craft, used in the second half of the 19th century and first half of the 20th century on many European rivers, [5] that made use of a steel chain laid along the riverbed for its propulsion. [2] [6] [7] The chain was engaged using a steam engine mounted on ...
Buffers and chain couplers are an assembly of several devices: buffers, hooks and links, or turnbuckle screws. [2] On the modern version of the couplers, rail vehicles are mated by manually connecting the end link of one chain which incorporates a turnbuckle screw into the towing hook of the other wagon, drawing together and slightly ...
A master link or quick-release link is a roller chain accessory that allows convenient connection and disconnection of a chain without the need for a chain tool. [1] It acts as a set of the chain's outer plates, so joining two sets of the chain's inner plate ends. Such master links may or may not be re-usable. [2]
The three-point hitch ( British English: three-point linkage) is a widely used type of hitch for attaching ploughs and other implements to an agricultural or industrial tractor. [1] [2] The three points resemble either a triangle, or the letter A. In engineering terms, three-point attachment is the simplest and the only statically determinate ...
Towing. Large ballast tractor pulling a heavy load (a transformer) on a hydraulic modular trailer using a drawbar. A British Airways Concorde being towed in New York City. Towing is coupling two or more objects together so that they may be pulled by a designated power source or sources.
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