What device did Watt invent to maintain a consistent engine speed regardless of the load?

Answer

The centrifugal governor (flyball governor)

Watt invented the centrifugal governor, also known as the flyball governor, which used rotating weights to adjust the steam intake valve and self-regulate the engine's pace.

What device did Watt invent to maintain a consistent engine speed regardless of the load?
inventionSignificanceengineSteamWatt