Effectively the fly-ball governor is changing the throttle settings with the operator having to deal with it.

Two classic mechanical examples are the toilet bowl float proportioning valve and the fly-ball governor.

Porter greatly improved the fly-ball governor by reducing the rotating weight and adding a weight around the shaft.

The phonograph regulated a record's speed at 78 r.p.m. with the equivalent of fly-ball governors, a concept that Turner adapted for the Gizmo.

A classic example is the centrifugal governor, also known as the Watt or fly-ball governor, which uses weights mounted on spring-loaded arms to determine how fast a shaft is spinning, and then uses proportional control to regulate the shaft speed.