A combination of such wheels, used to increase the mechanical advantage.
A small fixed wheel, sometimes turning in a block, with a grooved rim in which a rope or chain runs, as to raise a weight attached at one end by pulling on the other end: it changes the direction of effort but provides no mechanical advantage.
A wheel that turns or is turned by a belt, rope, chain, etc., so as to transmit power.
A simple machine consisting essentially of a wheel with a grooved rim in which a pulled rope or chain can run to change the direction of the pull and thereby lift a load.
A wheel turned by or driving a belt.
A machine consisting of a wheel over which a pulled rope or chain runs to change the direction of the pull used for lifting a load. Combinations of two or more pulleys working together reduce the force needed to lift a load.
The definition of a pulley is a small fixed wheel or a group of such wheels with a rope or chain in a grooved rim that is used to lift something up.
An example of a pulley is a device for raising a flag.
To raise or lift by means of a pulley.