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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 ...
Modular, standardized construction sets like Erector provided the ability to build a model, then take it apart and build something else, over and over again. Both AC-powered electric motors and battery-powered DC motors became available, usually equipped with gears to increase their torque and effective mechanical power. Later sets added ...
Meccano is a brand of model construction system created in 1898 by Frank Hornby in Liverpool, England.The system consists of reusable metal strips, plates, angle girders, wheels, axles and gears, and plastic parts that are connected using nuts and bolts.
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]
Simple machines are elementary examples of kinematic chains that are used to model mechanical systems ranging from the steam engine to robot manipulators. The bearings that form the fulcrum of a lever and that allow the wheel and axle and pulleys to rotate are examples of a kinematic pair called a hinged joint. Similarly, the flat surface of an ...
Most models offer the same power and speed ratings as equivalently-sized endless belts and do not require special pulleys to operate. A link v-belt is a number of polyurethane/polyester composite links held together, either by themselves, such as Fenner Drives' PowerTwist, or Nu-T-Link (with metal studs).
Gear manufacturing refers to the making of gears. Gears can be manufactured by a variety of processes, including casting , forging , extrusion , powder metallurgy , and blanking . As a general rule, however, machining is applied to achieve the final dimensions, shape and surface finish in the gear.
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.