Sarrus linkage
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The Sarrus linkage, invented in 1853 by Pierre Frédéric Sarrus, is a mechanical linkage to convert a limited circular motion to a linear motion without reference guideways. Although Charles-Nicolas Peaucellier was widely recognized for being the first to invent such a straight-line mechanism, the Sarrus linkage had been invented earlier; however, it was largely unnoticed for a time.[1]
Description
In the examples shown, the linkage uses two horizontal plates (red) positioned parallel to each other, one above the other. Pairs of rectangular plates (green) with hinges at the middle connect the horizontal plates. The circular arc motion of a hinge produces a linear vertical movement. The upper plate moves vertically up and down, towards and away from the lower plate.
The Sarrus linkage is of a three-dimensional class sometimes known as a space crank, unlike the Peaucellier–Lipkin linkage which is a planar mechanism.
Gallery
- Alternative Sarrus linkage
- 3-sided linkage
- 4-sided linkage
- 6-sided linkage
See also
- Chebyshev linkage
- Four-bar linkage
- Mathematica: A World of Numbers... and Beyond – iconic exhibition of mathematical models, which includes a Sarrus linkage
- Watt's linkage
References
- ↑ pergatory.mit.edu Archived 2007-02-10 at the Wayback Machine. – Sarrus' mechanism
External links
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Wikimedia Commons has media related to Sarrus linkage. |
- robotics.eecs.berkeley.edu – Sarrus linkage
- A Makerbot Printable Sarrus–Linkage a design for RepRap