Inventio Ag

Erich Spirgi

André Peter

Urs Ammon

Thomas Eilinger

Urs Polin

Danilo Peric

Enrique Almada

Daniel Bossard

Andre Peter

A method for operating an elevator having a car driven by a motor and at least one brake to stop the car, the method including closing a brake, increasing a torque of the motor until the car moves, and registering a value indicative of the motor torque at which the car moves.

Method for operating elevators to test brakes

An elevator load receiving apparatus or a compensating weight connected thereto by a suspension device is released from a safety device in a stopping position after downward travel, the load receiving apparatus and the compensating weight being moved by a drive unit including a reversible electric motor and a traction sheave engaging the suspension device. Many safety devices, after stopping must be moved counter to the travelling direction of the load receiving apparatus before stopping in order to release (moved upwards in the case of stopping after downward travel). The safety device is easily released by activating the drive unit for a time (tmax1) or a certain distance (smax) with a predetermined torque (Mmax) counter to the direction of release and subsequently activated as abruptly as possible with the predetermined torque in the direction of release. This method can be used to release the compensating weight from its stopped position.

Method for releasing a load-carrying apparatus or a compensating weight of an elevator from a stopping position

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Hergiswil, Switzerland

Erich Spirgi