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Pulleys allow transferring power on distance much easier and with less losses that using number of gear wheels. Using pulleys in mechanical toys also allows to change the angle, the speed and the direction of the motion. Wind-up toys typically are powered by a metal spring that is tightened by turning it. Then gear wheels and pulleys can ...
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]
This allows for free-spinning parts, and also for construction of "cage" or "lantern" gears. Short pointed sticks (originally wood, but later plastic), typically red, and flags ("fan blades"), typically green plastic, and various other small parts. Spools and pulleys all have a single groove around the outside; "Part W" has two parallel grooves.
Examples of rope and pulley systems illustrating mechanical advantage. Consider lifting a weight with rope and pulleys. A rope looped through a pulley attached to a fixed spot, e.g. a barn roof rafter, and attached to the weight is called a single pulley. It has a mechanical advantage (MA) = 1 (assuming frictionless bearings in the pulley ...
Capsela is a construction toy brand consisting primarily of gears and motors in spherical plastic capsules that can be connected to form various static or dynamic toys suitable for land or water. [1] The capsules typically have six hollow octagonal connectors protruding, where an octagonal sleeve piece bridges between two capsules.
Hardened steel rods and screw clamps allowed the construction of hinges and the transmission of mechanical power via rotating parts such as pulleys, gears, wheels, and levers. Unlike some earlier wooden construction sets, Erector could be used both for static structures and for dynamic structures incorporating mechanical linkages and other ...