Technology
Systems and Control
Simple Pulley
2:1 Pulley System
4:1 Pulley System
A load can be lifted using a simple (1:1 ratio) pulley system. The load is lifted an equivalent distance to the movement of the effort. The effort is equal to the load. A load can be lifted using 2:1 ratio pulley system. The load is lifted half the distance that the effort moves. The effort is equal to half that of the load. A load can be lifted using 4:1 ratio pulley system. The load is lifted a quarter of the distance that the effort moves. The effort is equal to a quarter of that of the load.
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6:1 Pulley System
Gear Systems
Belt and Pulley
A load can be lifted using 6:1 ratio pulley system. The load is lifted a sixth of the distance that the effort moves. The effort is equal to a sixth of that of the load. Shows the action of differential gears, idlers and complex gear systems. Shows how pulleys can be linked together with belts in ways to speed up and slow down rotation.
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Worm and Worm Wheel
Bevel Gears
Rack and Pinion
Shows how a worm can be used to turn a gear so that rotary motion is slowed considerably, the rotation and torque both being transferred at right angles. Shows how bevel gears are used to transmit rotary motion at right angles. Demonstrates how linear motion can be converted to rotary motion or vice versa.
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Chain and Sprockets
Cam Systems
Parallel Linkage
A demonstration how motion can be transferred between two tooted wheels via a chain. A circular cam, pear-shaped cam and snail cam (drop cam) can be rotated and the motion of the followers investigated. Shows how a parallel linkage creates identical an identical parallel motion.
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Reverse Linkage
Bell Crank
Crank Slider

The reverse linkage shows that pulling or pushing the linkage on one side creates the opposite motion on the other side of the linkage. The Bell Crank converts a pull or a push through a right angle. Shows how rotary motion can be converted to linear motion.

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Treadle Linkage
Ratchet and Pawl
 

The treadle linkage is used to convert rotary motion into oscillating motion.

The ratchet and pawl allows movement in only one direction (in this case clockwise).

 

 

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