with retroactive action

Full Title

Controlling > by varying liquid flow > of turbines > Regulating, i.e. acting automatically > by speed, e.g. by measuring electric frequency or liquid flow > with retroactive action

Classification Context

Section:

MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

Class:

MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR

Subclass:

MACHINES OR ENGINES FOR LIQUIDS