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Elmer E. Woodward's state-of-the-art oil pressure relay valve water wheel governor patented in 1912.

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✔ S - small (294 x 432)
✔ M - medium (404 x 594)
✔ L - large (515 x 756)
✔ XXL - huge (846 x 1242)
Original

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1917 ads.jpg

IMPROVEMENT IN WATER GOVERNOR CONTRAPTION, CIRCA 1887. AD.

Ad showing a Woodward compensating type governor application from 1917.

Posted on: Friday 26 February 2016
Albums: HISTORICAL WATER POWER ENGINEERING.
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