Single rope elevator governor

摘要

An elevator system that includes a cab unit is connected by a hoisting system to a counterweight unit so that both units move at the same speed over vertical rails. A single governor rope is trained in an endless loop between an upper drive sheave and a lower tensioning sheave so that a pair of vertically disposed parallel runs of rope pass between the units. A bidirectional governor brake is arranged to retard the ropes speed when an over speed condition is encountered. Safeties associated with both units are connected to the opposite runs of the governor rope and are tripped when the governor rope is braked.