Linkages

Compound Levers and Linkages What do we know about linkages?

Compound Lever
Linkages are compound levers.
One lever operates another

Examples of Compound Levers
Folding chairs
Baby carriages
Vice grip pliers
Umbrellas
Lawn sprinklers
Windshield wiper mechanisms
Adustable-arm desk lamps
Clothes drying racks
Pop-out tool boxes and sewing boxes
Bicycle handbrake mechanisms
Manual typewriter mechanisms

For Example: The Nail clipper
The handle is a second-class lever
The upper Jaw is a third-class lever

Examine the Nail Clipper Effort A Handle Fulcrum B Jaw Load A Handle Effort B Jaw Fulcrum A Handle Load B Jaw

What’s a Linkage?
A linkage is a compound lever, in which one lever acts on another.

Linkages in Action
http://mathforum.org/sketchpad/java_linkages.html
http://www.math.toronto.edu/~drorbn/People/Eldar/thesis/Transformer.htm

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Linkages

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