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- The Woodward Governor Company manufactured their one-millionth governor in 1970.
- A James Leffel Water Wheel blueprint number 43640, circa 1944.
- Closeup showing the application of the Woodward vertical model compensating governor.
- A James Leffel Water Wheel blueprint number 43640, circa 1944.
- Is this Mill still standing? What happened to the Woodward governor?
- A James Leffel Water Wheel blueprint number 43640, circa 1944.
- A James Leffel Water Wheel blueprint number 43640, circa 1944.
- A 1944 James Leffel Water Wheel blueprint drawing showing a Woodward size D governor.
- A James Leffel Water Wheel blueprint number 43640, circa 1944.
- The new Woodward Hydraulic Governor, circa 1914.
- Elmer E Woodward's new hydrauic governor for turbine water wheels.
- Woodward catalogue page from 1918.
- Woodward VR series turbine water wheel governor.
- Woodward VR series Oil Pressure water wheel governor.
- STATE OF THE ART ENERGY CONTROLS SINCE 1870.