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

WGC 21.jpg ELMER WOODWARD'S NEW TYPE OF OIL PRESSURE WATER WHEEL GOVERNOR '' GATESHAFT'' TYPE, CIRCA 1912.ThumbnailsThe Woodward Governor Factory on Mill Street in the Water Power District in Rockford, Illinois(1910-1941).ELMER WOODWARD'S NEW TYPE OF OIL PRESSURE WATER WHEEL GOVERNOR '' GATESHAFT'' TYPE, CIRCA 1912.ThumbnailsThe Woodward Governor Factory on Mill Street in the Water Power District in Rockford, Illinois(1910-1941).ELMER WOODWARD'S NEW TYPE OF OIL PRESSURE WATER WHEEL GOVERNOR '' GATESHAFT'' TYPE, CIRCA 1912.ThumbnailsThe Woodward Governor Factory on Mill Street in the Water Power District in Rockford, Illinois(1910-1941).ELMER WOODWARD'S NEW TYPE OF OIL PRESSURE WATER WHEEL GOVERNOR '' GATESHAFT'' TYPE, CIRCA 1912.ThumbnailsThe Woodward Governor Factory on Mill Street in the Water Power District in Rockford, Illinois(1910-1941).
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2017:06:28 19:36:54

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