Peaucellier Straight Line Linkage

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The Peaucellier Linkage Transforms Rotary Motion into Exact Straight Line Output. During the Industrial Revolution, scientists were intensely researching mechanisms to transform rotary motion into linear motion. These mechanisms were crucial for guiding pistons of early steam engines and manufacturing precision parts. Watt's linkage was one of the first attempts to solve this problem but only approximates a straight line. The Sarrus linkage is another mechanism that does not operate in a single plane. The Peaucellier Linkage generates a perfect straight line by geometrically inverting a circular curve. Lord Kelvin saw a model of this mechanism and reportedly claimed it was the most beautiful thing he had ever seen in his life. A detailed explanation and history of this linkage can be found at: http://en.wikipedia.org/wiki/Peaucellier%E2%80%93Lipkin_linkage