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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.
A pulley may have a groove or grooves between flanges around its circumference to locate the cable or belt. The drive element of a pulley system can be a rope, cable, belt, or chain. The earliest evidence of pulleys dates back to Ancient Egypt in the Twelfth Dynasty (1991–1802 BC) [1] and Mesopotamia in the early 2nd millennium BC. [2]
The upright row is one exercise that can be performed on the cable machine. A cable machine is an item of equipment used in weight training or functional training.It consists of a rectangular, vertically oriented steel frame about 3 metres wide and 2 metres high, with a weight stack attached via a cable and pulley system to one or more handles. [1]
A conveyor pulley is a mechanical device used to change the direction of the belt in a conveyor system, to drive the belt, and to tension the belt.Modern pulleys are made of rolled shells with flexible end disks and locking assemblies.
The Treehouse is a point-and-click educational video game for MS-DOS and then ported to Mac and the FM Towns, with Windows versions arriving later. Following the success of The Playroom , Broderbund created The Treehouse , which provides more content and furthers the user's ability to explore. [ 3 ]
Belts are looped over pulleys and may have a twist between the pulleys, and the shafts need not be parallel. In a two pulley system, the belt can either drive the pulleys normally in one direction (the same if on parallel shafts), or the belt may be crossed, so that the direction of the driven shaft is reversed (the opposite direction to the ...
A dumb pulley can lift very large masses a short distance. It consists of two fixed pulleys of unequal radii that are attached to each other and rotate together, a single pulley bearing the load, and an endless rope looped around the pulleys. To avoid slippage, the rope is usually replaced by a chain, and the connected pulleys by sprockets.
The Treehouse host segments were replaced with short series (some produced by YTV in-house) and promos. The Fuzzpaws got their own short series on YTV Jr., and PJ Katie became Jenny on The Zone . YTV dropped the YTV Jr. branding from its morning lineup in mid-2002 [ citation needed ] .