Thompson Indicator for Steam Engine
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“The indicator consists of a cylinder in which a piston is fitted, a spring, multiplying lever, and parallel motion for the pencil and cylinder or drum for the paper. The piston is fitted accurately to the cylinder and has a travel about one—half inch.” —Derr, 1911
Keywords
indicator, Steam Power Generation, Thompson Steam Indicator, Thompson Indicator for Steam Engine, Steam Engine IndicatorGalleries
Steam Power GenerationSource
Derr, Louis Cyclopedia of Engineering (Chicago, IL: American Technical Society, 1911)
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