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A traveling block is the freely moving section of a block and tackle that contains a set of pulleys or sheaves through which the drill line (wire rope) is threaded or reeved and is opposite (and under) the crown block (the stationary section).
In the latter part of the 19th century, wire rope systems were used as a means of transmitting mechanical power [11] including for the new cable cars. Wire rope systems cost one-tenth as much and had lower friction losses than line shafts. Because of these advantages, wire rope systems were used to transmit power for a distance of a few miles ...
It acquired the wire rope division of A.H. Leschen & Sons of St. Louis, Missouri in 1962; the Armco Steel wire rope division in 1988; the Rochester Corporation wire rope division in 1998; the Broderick Bascom Rope Company and MacWhyte Wire Rope Company of Wisconsin in 1999; the Aceros Camesa in Mexico in 2005; entered into a joint agreement ...
It makes wire rope for bridges, cranes, elevators and mine shafts. It claims to be the only company in the world that makes wire rope from hot rolled steel.A brand of its wire rope is called Dyform; Dyform was introduced in the late 1960s as a seven-wire tendon for prestressed concrete construction.
In sailing, a block is a single or multiple pulley. One or a number of sheaves are enclosed in an assembly between cheeks or chocks. In use, a block is fixed to the end of a line, to a spar, or to a surface. A line (rope) is reeved through the sheaves, and maybe through one or more matching blocks at some far end, to make up a tackle.
Crown block. A crown block is the stationary section of a block and tackle that contains a set of pulleys or sheaves through which the drill line (wire rope) is threaded or reeved and is opposite and above the traveling block. [1] [2]
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