Motion Reduction using Pantograph of Piston Connected to Indicator of Steam Engine

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A pantograph used to reduce motion of the piston. At point D, a string is attached to the indicator, measuring pressure of steam in cylinder. The pantograph is attached to a solid surface on top. As the piston moves, the pantograph pulls the string.


Derr, Louis Cyclopedia of Engineering (Chicago, IL: American Technical Society, 1911)


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