Abstract: An elevator door device includes a failure detection vane mounted on a safety shoe, and a failure detection roller to be brought into contact with the failure detection vane to turn on a shoe switch. The failure detection roller is mounted only on an OFF-failure detection floor. In a case where the shoe switch is turned off when a door is fully closed on the OFF-failure detection floor, it is determined that the safety shoe has OFF failure, and in a case where the shoe switch is turned on when the door is fully closed on an ON-failure detection floor, on which the failure detection roller is not mounted, it is determined that the safety shoe has ON failure.

Abstract: An elevator for transporting a person between two floors of a building includes at least one carriage and a lifting system. The elevator includes a control system and door sensors detecting the opening and closing of doors covering a hoist way. The control system detects a first opening and closing of a door in front of the carriage and activates the lift system to move the carriage to an opposite floor. Upon detecting a second opening and closing of a door in front of the carriage, the control system places the lift system in a standby state. Upon detecting a third opening and closing of a door in front of the carriage, the control system again activates the lift system to move the carriage to an opposite floor.

Abstract: A control system for a motorized freight elevator landing door in which all of the doors in a single line of a hoistway are controlled with one set of proximity sensors carried on the elevator car. The sensors signal a controller that operates electric motors for opening and closing the landing door where the car has stopped. The door operating motors are two speed units and the sensors and controller are arranged to operate the motors at high speed during most of the travel in opening or closing movement and at reduced speed at the end of movement. The controller applies power to the motor for a short period after the door is fully closed or open to stall the motors and thereby dampen any rebound motion.

Abstract: An elevator shaft door having a door part that comprises two panels, which are suspended on rolling carriages and guided at the bottom. These door parts perform movements of different length in the same direction during an opening and closing movement, and during these movements move past one another on parallel tracks, with a changing overlap. The rolling carriage of the panel that moves ahead during a closing movement is attached to the ends of a tension cable that is fixed in place, which is guided around deflection rollers that are mounted to rotate on the rolling carriage of the other panel, which moves behind. The deflection rollers are arranged to rotate around vertical axes of rotation and have different diameters.

Abstract: These carriers for the reception of all important components of a door drive can be used in different door systems with different entrance widths. For this purpose the carrier (10) consists of a base part (11) and a length adapter (12), which are connectible together in such a manner that carriers (10) of different lengths can be produced.

Abstract: A procedure determines the parameters for an electric drive that controls a synchronous elevator motor having permanent magnets, a computer controlling the operation of the electric drive being provided with a control model describing the elevator and containing settable parameters. To determine electric drive parameters, an elevator car installed in the elevator shaft is allowed to enter a motional condition produced by the balance difference between the elevator masses using two different loads connected to the terminals of the synchronous motor, the rotational speed, electromotive force and synchronous reactance of the synchronous motor are measured while the elevator car is in a constant motional condition, and the stator resistance is measured via a separate measure. A control model describing the elevator is computed and formed from these measurements.

Abstract: An elevator car door operator includes a drive motor, a drive pulley mounted for rotation by the drive motor, a continuous loop drive belt mounted on the drive pulley at one end of the belt and on an idler pulley at the other end of the belt, a drive bar connected to the drive belt and slidably mounted on a bar guide for translational movement across the elevator car door header. One or more doors are slidably mounted on guide tracks for movement between open and closed positions. One of the doors is either connected directly to the drive bar, or connected to a two-to-one relating cable mounted on the drive bar, so that the motion of the drive bar is transmitted to that door, thereby slidably positioning the door as the drive bar is slidably positioned by the belt along the length of the bar guide.

Abstract: An elevator system has a car provided with a doorway and a door movable across the doorway. An improved mechanism to move the door selectively to open and closed positions includes a header mounted to the car above the door. The header supports a linear drive carrying the door. The drive includes a spool rotationally mounted to the header for driving a cable wound about the spool, the cable being operatively connected to a hanger carrying the door for moving the hanger linearly across the header responsive to rotational movement of the spool. The spool further includes a vertically extending axial opening. A door operator comprises a motor driving an output shaft. The door operator is secured to the header so that the output shaft is received in the spool axial opening, whereby operation of the motor causes rotation of the spool.