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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]
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.
In 1888 Reeves and his brothers, Marshal and Girney purchased the Edinburg Pulley Company and renamed it the Reeves Pulley Company. Marshal was the driving force behind this venture having first invented a tongueless corn plow in 1869 and in 1875 he formed the Hoosier Boy Cultivator Company with his father and uncle.
A conveyor belt is the carrying medium of a belt conveyor system (often shortened to a belt conveyor). A belt conveyor system consists of two or more pulleys (sometimes referred to as drums), with a closed loop of carrying medium—the conveyor belt—that rotates about them.
A type of pulley with a grooved wheel known as a sheave is used in zip-lines, and the pulley turns as it travels along, thus reducing friction and enabling greater speed than would otherwise be possible. [27] The zip-line trolley ("zipliner") is the frame or assembly together with the pulley inside that run along the cable. [28]
He realized that a lever, pulley, and wheel and axle are in essence the same device: a body rotating about a hinge. Similarly, an inclined plane, wedge, and screw are a block sliding on a flat surface. [32] This realization shows that it is the joints, or the connections that provide movement, that are the primary elements of a machine.
Fast-forward 2 years and Pulley, also co-founded by Mark Erdmann, continues to hold its own. When Yin Wu started Pulley, a cap table and equity management startup, back in 2019, she was out to ...
A drum motor (or motorised pulley) is a geared motor drive enclosed within a steel shell providing a single component driving pulley for conveyor belts.. Drum Motor with Planetary Gear Drum Motor With Helical Spur Gear