The Fisher Tradition
In 1880, William Fisher, an engineer at the city waterworks in Marshalltown, Iowa, worked continuously for over twenty-four hours to manually maintain constant discharge pressure on a steam-driven water pump to supply water to fight a fire.
From this experience, Fisher invented the constant-pressure pump governor and founded the Fisher Controls Company to manufacture his regulator. By 1907, these governors were installed in power plants in the United States, Canada, and England.