of Pulley
Source: Webster's dictionaryA belt conveyor system consists of two or more pulleys (sometimes referred to as drums), with an endless loop of carrying medium—the conveyor belt—that rotates about them. Source: Internet
A block and tackle can have several pulleys mounted on the fixed and moving axles, further increasing the mechanical advantage. Source: Internet
A camera track constructed on pulleys alongside the stairway together with a chairlike device had to be constructed and thoroughly tested over a period of weeks. Source: Internet
A double tackle has two pulleys in both the fixed and moving blocks with four rope parts supporting the load W. Separation of the pulleys in the double tackle show the force balance that results in a rope tension of W/4. Source: Internet
Additionally, although they may display the same weight stack, different machines may be heavier or lighter depending on the number of pulleys and their arrangements. Source: Internet
A paper by Burkhalter and Sharp provides details on usage. citation Deployment Deployment of the LRV from the LM's Quadrant 1 bay by the astronauts was achieved with a system of pulleys and braked reels using ropes and cloth tapes. Source: Internet