Home / HISTORICAL WATER POWER ENGINEERING. 6
Creation date / All / July / 6
- Elmer E. Woodward's state-of-the-art oil pressure relay valve water wheel governor patented in 1912.
- Data from Water Power Engineering, circa 1908.
- Data from Water Power Engineering, circa 1908.
- Elmer E. Woodward's state-of-the-art mechanical compensating type water wheel governor.
- Elmer E. Woodward's new water wheel governor from three patents.
- Another vintage Elmer Woodward ad from 1905.