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A Woodward VR(vertical relay) type hydraulic governor from patent number 1,106,434, circa 1912.

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The first Woodward oil pressure hydraulic water wheel governor from patent number 1,106,434.

Elmer Woodward's new oil pressure relay valve water wheel governor from his 1912 patent.

Posted on: Friday 9 April 2021
Albums: Historical Hydroelectric Power Plant Equipment Engineering. / Historical Elmer Woodward Oil Pressure Water Wheel Governor information.
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