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An endless rope system was developed in Nottinghamshire around 1864, and another independently developed near Wigan somewhat later (also in England). [29] In these systems, individual cars or trains within the mine could be connected to the cable by a grip comparable to the grips used on surface cable car systems. [ 30 ]
The gripping sailor's hitch [a] is a secure, jam-proof friction hitch used to tie one rope to another, or a rope to a pole, boom, spar, etc., when the pull is lengthwise along the object. It will even grip a tapered object, such as a marlin spike, in the direction of taper, similar to the Icicle hitch , and it is much superior to the rolling ...
A rope passes around it, with one end attached to a fixed point above, e.g. a barn roof rafter, and a pulling force is applied upward to the other end with the two lengths parallel. In this situation the distance the lifter must pull the rope becomes twice the distance the weight travels, allowing the force applied to be halved.
The pulleys were manufactured in collaboration with Richard and George Tangye. According to Richard Tangye's autobiography, the Weston differential pulley evolved from the Chinese windlass, with an endless chain replacing the finite length of rope. He claimed that many engineering firms conceded on the difficulty of efficiently disengaging the ...
A messenger line or just messenger is relatively light cordage used to pull a heavier cable across a gap or through a tube or duct. [1] [2] The term is also used for a line used to pull or lower a package along a downline or jackstay. [3] A heaving line is a rope with a weighted end which can be thrown relatively easily across a gap. If it is ...
A block and tackle [1] [2] or only tackle [3] is a system of two or more pulleys with a rope or cable threaded between them, usually used to lift heavy loads.. The pulleys are assembled to form blocks and then blocks are paired so that one is fixed and one moves with the load.
The endless rubber V-belt was developed in 1917 by Charles C. Gates of the Gates Rubber Company. [ 14 ] [ non-primary source needed ] Multiple-V-belt drive was first arranged a few years later by Walter Geist of the Allis-Chalmers corporation, who was inspired to replace the single rope of multi-groove-sheave rope drives with multiple V-belts ...
Rope splicing in ropework is the forming of a semi-permanent joint between two ropes or two parts of the same rope by partly untwisting and then interweaving their strands. Splices can be used to form a stopper at the end of a line, to form a loop or an eye in a rope, or for joining two ropes together. [ 1 ]
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