http://en.wikipedia.org/wiki/Walschaerts_valve_gear
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Wednesday, February 12, 2014
Walschaerts valve gear
The Walschaerts valve gear is a type of valve gear invented by Belgian railway mechanical engineer Egide Walschaerts
in 1844 used to regulate the flow of steam to the pistons in steam
engines. The gear is sometimes named without the final "s", since it was
incorrectly patented under that name.
http://en.wikipedia.org/wiki/Walschaerts_valve_gear
http://en.wikipedia.org/wiki/Walschaerts_valve_gear
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