Single rope elevator governor
AssigneeOtis Elevator Company
InventorsLuis Marté, Andres Monzón, Emilio Fernández-Salinero
Life of this patent
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Abstract
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.
Claims8
In an elevator system having a cab unit movably suspended between a first pair of guide rails and a counterweight unit movably suspended between a second pair of guide rails, safeties mounted upon both units which, when activated, brake against said guide rails, a means for connecting the two units so that they move over the guide rails at the same speed, a governor for sensing the speed of said units and activating the safeties when an over speed condition is detected that includes:
- a governor rope trained over an upper sheave in an endless loop so that two parallel vertically disposed runs of rope pass downwardly between the units,
- means for attaching the governor rope to one of the units whereby the rope travels at the same speed as the units,
- a bi-directional governor brake operatively associated with said sheave for applying a braking force to the governor rope when the governor rope exceeds a given speed in either direction,
- a first actuator means for connecting the safeties on one unit to the governor rope,
- a second actuator means for attaching the safeties on the second unit to the governor rope,
- said first and second actuators being displaced when said governor rope is braked to trip the safeties on both of said units.
Dependencies are inferred from the claim text.