Home / HISTORICAL WATER POWER ENGINEERING. 140
Creation date / 2017
« 2016
2018 »
January
February
March
April
May
June
July
August
September
October
November
December
All
- 20
- 21
- 22
- 23
- Elmer E. Woodward's state-of-the-art oil pressure relay valve water wheel governors patented in 1912.
- WGC 21
- WGC 22
- WGC 23
- WGC 24
- 25
- 26
- 1
- Another vintage Elmer Woodward ad from 1905.
- Elmer E. Woodward's new water wheel governor from three patents.
- Elmer E. Woodward's state-of-the-art mechanical compensating type water wheel governor.