Description
Class B66B : ELEVATORS; ESCALATORS OR MOVING WALKWAYS
Subclass 1/12: Control systems of elevators in general (safety devices B66B 5/00; controlling door or gate operation B66B 13/00; systems of general application G05) Control systems without regulation, i.e. without retroactive action electric with devices, e.g. handles or levers, located at a control station for direct control of movements, e.g. electric mining-hoist control systems