Abstract: A method of operating an elevator system with a drum for taking up a suspension device, a drive unit for driving the drum, and a control unit for controlling the drive unit, includes operating the control unit of the drive unit to prescribe a rotational speed that depends on a length of the suspension device that is rolled onto the drum. Also included is an elevator system in which the method can be used.

Abstract: An elevator door system includes a motor, a vertical reel, and a door attached at a first end to the vertical reel for winding and unwinding thereupon. A force transmission device interconnects a second end of the door and a compensation device whereby the motor simultaneously drives the vertical reel and the compensation device having a variable diameter. In use, as the door is unwound from the vertical reel, the force transmission device is simultaneously wound upon the compensation device. Hence, not only is a thrust exerted on the door by the vertical reel, but a drag is exerted thereupon by the force transmission device. Furthermore, the compensation device has a variable diameter to compensate for, amongst other things, the changes in the diameter the door wound on the vertical reel. Hence, the tension in the force transmission device and the door can be kept substantially constant during operation.

Abstract: A method of constructing an elevator installation having a support plate with a drive unit in a first installation position, an elevator car and a counterweight and in which the drive unit is connected by a support cable with the elevator car and the counterweight. A cross member has a chain hoist and is mounted above a second installation position, the chain hoist being connected with the support plate by a chain, the support plate being released from the first installation position, raised by the chain hoist from the first installation position to the second installation position and finally is mounted in the second installation. An elevator installation has at least one recess, which serves for mounting the support plate, formed in a shaft wall.

Abstract: A door system includes a reel, a door interconnect at a first end to the reel for winding and unwinding thereupon and one or more guide channels. The reel is rotatably mounted on a lever which is pivotally mounted to a pivot axis. Thus, the reel can pivot about the pivot axis to ensure that, during operation, a point at which an outer layer of the door engages/disengages with the penultimate door layer remains in the same general location with respect to the guide channels and accordingly, an angle (if any) at which the door enters the guide channels remains constant throughout operation of the door system.

Abstract: A method of mounting an elevator installation includes providing an elevator car in the lower shaft region, introducing a support belt into the elevator shaft and guiding the belt around the car deflecting rollers arranged at the bottom at the elevator car. The remaining portions of the belt are stored in the region of a work platform of the elevator car. The elevator car is raised into an upper shaft region and the first end of the belt is fastened to a first connecting point. The second end of the belt is led around a traction pulley and a loop, between the traction pulley and the second end, is let down to the lower shaft region and a counterweight deflecting means inclusive of a counterweight is suspended in the loop. The second end of the support belt then is attached at the second connecting point.

Abstract: An elevator system includes an elevator car having a car door, a drive unit for moving the elevator car along an elevator shaft wall provided with shaft doors and a controller for controlling movement of the elevator car along the elevator shaft wall. A separate fault detecting device is mounted in a region of each of the shaft doors and in a region of the car door for generating fault information to controller. A status detecting unit generates to the controller status information about a position and a speed of the elevator car. In the case of a fault in the region of one of the shaft doors, the controller permits operation of the elevator car between those floors that can be reached by the elevator car without having to pass the floor at the shaft door where the fault has occurred.

Abstract: A buffer supports an elevator car and/or a counterweight for the elevator car, wherein the elevator car and the counterweight are each movable along a respective path in an elevator shaft. The buffer partly projects into the path of the elevator car and the path of the counterweight to produce a mechanical contact with the elevator car when the elevator car moves below a first spacing with respect to a floor of the shaft. The buffer additionally produces a mechanical contact with the counterweight when the counterweight falls below a second spacing with respect to the floor.

Abstract: The method serves for automatic checking of the availability of technical equipment which is arranged in or at a building and executes at least one repeatable procedure, and comprises the following steps. There is determined at least one estimated value (NS(i,t)) for the frequency of the performance of the procedure for a first time period and/or second estimated value (NS(i,t+?t)) for the frequency of the performance of the procedure for a second time period. A measured value Nm(i,t)) for the frequency of the performance of the procedure for the first time period is determined and the measured value is compared with at least one of the estimated values (NS(i,t), NS(i,t+?t)).

Abstract: A weight compensation system and a method of operating the system for compensating eccentric loading of an elevator car vertically movable in an elevator shaft. The elevator car has spring-mounted rollers engaging guide rails and the system includes sensors detecting a position of the elevator car relative to the guide rails. A control unit is connected to the sensors and a hydraulic compensating system for controlling movement of liquid to compensate for the eccentric loading of the elevator car.

Abstract: An arrangement and method for preventing unauthorized access of personnel into the hoistway of an elevator system. The arrangement includes a security device for mounting in the vicinity of an auxiliary release mechanism of a landing door to prevent actuation of the auxiliary release mechanism during normal operating conditions. The security device includes an energization circuit which, in use, is responsive to changes in operating conditions of the elevator system and may also include an obstruction member movable in response to the energization circuit between a first position preventing key access through a keyhole during normal operating conditions and a second position permitting access through the keyhole during abnormal operating conditions. Accordingly, a key can only be inserted through the keyhole to actuate an unlocking bit of the auxiliary release mechanism to release the landing doors during abnormal operating conditions.

Abstract: An improved escalator or moving walk construction, head elements are pre-assembled as a sub-assembly which is subsequently mounted on the truss of the escalator. The sub-assembly includes comb plate holders, one on each side, which carry a comb plate. The comb plate holder may have a C-shaped profile and may be reinforced by stiffening ribs so as to be able to bear the weight of the end-curve of a balustrade. By means of supports arranged on the truss, the height of the comb plate carrier can be adjusted to that of the truss. During pre-assembly, and until after final mounting on the truss, the comb plate serves as a connecting element between comb plate holders.

Abstract: A multi-stage elevator car has equipment for fine positioning of the cars wherein the car thresholds are positionable at the level of the floor thresholds. Adjusting equipment operating on the principle of a differential block and pulley is provided for fine positioning of the cars, the equipment including an endless cable guided over deflecting rollers arranged at the main frame of the multi-stage car and over deflecting rollers arranged at the cars, wherein the cars execute vertical movements of opposite sense.

Abstract: A cleaning unit for cleaning travel equipment allows the travel equipment to be shifted from an operating mode to a cleaning mode. The cleaning equipment is an escalator or a moving walkway which has tread units connected with an endless conveyor. The cleaning unit can be mounted as a substitute for a tread unit of the travel equipment during a cleaning sequence and includes cleaning elements. The travel equipment can be shifted from an operating mode to a cleaning mode in which the cleaning equipment is substituted for one or more tread units and the travel equipment operated whereby a cleaning sequence is performed. After cleaning is performed, the equipment is stopped, the cleaning equipment removed, and the removed treads reinstalled.

Abstract: An elevator shaft door having a door panel composed of a front wall and rear wall, which walls are connected together by a thermally releasable material, wherein at least a part of the closing edge of the respective door panels consists of a profile member that is formed by the back wall or thermally non-detachably fastened to the back wall. In the case of a fire, the back wall separates from the front wall through release of the thermally releasable material, wherein the front wall curves by heat effect while the back wall with the closing edge retains the original shape.

Abstract: An elevator counterweight comprises a counterweight frame constructed from several vertical beams and at least three horizontal crossbars wherein the vertical beams penetrate the horizontal crossbars and form therewith several grid fields in which weight elements are arranged and fixed. The two outermost grid fields disposed above the lowermost horizontal crossbar are open towards the side and can each receive a counterweight guide shoe and a safety brake device.

Abstract: A support for an elevator installation includes at least two cables of several strands each, which cables are designed for acceptance of force in a longitudinal direction, and wherein the cables are arranged along the longitudinal direction of the support at a spacing from one another and are connected by a cable casing. The cable casing has a transition region which lies between the cables and is provided with openings and webs. The webs are formed to enable a relative displacement of the cables relative to one another in the longitudinal direction.