A governor, or speed limiter or controller, is a device used to measure and regulate the speed of a machine, such as an engine.
The devices shown are on steam engines. Power is supplied to the governor from the engine’s output shaft by a belt or chain connected to the lower belt wheel. The governor is connected to a throttle valve that regulates the flow of working fluid (steam) supplying the prime mover. As the speed of the prime mover increases, …
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