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A block and tackle is characterized by the use of a single continuous rope to transmit a tension force around one or more pulleys to lift or move a load. Its mechanical advantage is the number of parts of the rope that act on the load. The mechanical advantage of a tackle dictates how much easier it is to haul or lift the load.
A rope and pulley system—that is, a block and tackle—is characterised by the use of a single continuous rope to transmit a tension force around one or more pulleys to lift or move a load—the rope may be a light line or a strong cable.
A towing sock or wire rope puller or wire pulling grip is a device that connects to the end of a cable, such as a power cable, in order to pull it through a tube or tunnel. [1] It works by tightening around the cable when pulled, in the same manner as a Chinese finger trap . [ 2 ]
The tensioned portion of the rope would fasten the ship to the quay, hoist a foresail, lift a spar into position on the mast or be used to transfer cargo to or from a dock or lighter. A capstan is a vertical-axled rotating machine developed for use on sailing ships to multiply the pulling force of sailors when hauling ropes, cables, and hawsers.
Rope may be constructed of any long, stringy, fibrous material (e.g., rattan, a natural material), but generally is constructed of certain natural or synthetic fibres. [1] [2] [3] Synthetic fibre ropes are significantly stronger than their natural fibre counterparts, they have a higher tensile strength, they are more resistant to rotting than ropes created from natural fibres, and they can be ...
The Cowlairs incline was an example of this, with a continuous rope used on this section from 1842 until 1908. The middle section of the Erkrath-Hochdahl Railway in Germany (1841–1926) had an inclined plane where trains were assisted by rope from a stationary engine and later a bank engine running on a second track.
The rope available at the time proved too susceptible to wear and the system was abandoned in favour of steam locomotives after eight years. In America, the first cable car installation in operation probably was the West Side and Yonkers Patent Railway, New York City's first-ever elevated railway, which ran from 1 July 1868 to 1870.
It is often considered a continuous system since it features a haul rope which continuously moves and circulates around two terminal stations. [1] In contrast, an aerial tramway operates solely with fixed grips and simply shuttles back and forth between two end terminals. [2]
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