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184-Gravimetric-Coal-Feeder_01.jpg

Drawing from patent documents for Gravimetric Coal Feeder.

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The Innovation Gateway a project of the highly respected, 30-year-old Invention & Technology—America’s only popular magazine of the history of engineering. To create the website, the American Heritage Society is partnering with the leading engineering societies including ACS, AIAA, ASABE, ASME, ASCE, and IEEE to put together in one location over 2,000 detailed essays on the history of engineering and the enormous range of contributions that inventors and engineers have made to our modern world. is created by American Heritage Publishing.

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