- Elmer Woodward hydraulic(oil pressure) turbine water wheel governor patent.
- Relay valve oil pressure water wheel governor patent 1,106,434.
- Elmer E. Woodward's first oil pressure(hydraulic) water wheel governor.
- 1106434. Page 3.
- PATENT NUMBER3,511,052
- 11064341 sheet 1 of 2.
- WOODWARD WATER WHEEL GOVERNOR PATENT 432,105. PAGE 3
- 1106434. Page 4.
- 1106434. Page 5.
- 608245 2
- 432105 4
- 432105 1
- 679353 3
- 2 SHEETS.
- 679353 4