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A Three Bar Linkage

© Copyright 2003, Jim Loy

Here is a linkage which draws a complicated curve (green). And the pantograph is the purple linkage which duplicates the same curve, at double the size (yellow). A pantograph can draw other ratios besides 2/1, by adjusting some of the lengths.

Please enable Java for an interactive construction (with Cinderella).

The above Java animation was created with Cinderella (a geometry program).


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