A method for operating a safety system having a control unit, a bus, a plurality of bus nodes connected to the control unit via the bus and a plurality of participants connected to the control unit via the bus nodes, wherein at least one participant is designed as a temporary participant. The method involves the steps that the temporary participant is notified in the safety system by the temporary participant being connected at a bus node to the safety system via the bus, the temporary participants is recognized by the control unit, the temporary participant is integrated into the safety system by the control unit and the temporary participant is activated at least once. A further aspect of the invention relates to a safety system for an elevator system for carrying out the method and to an elevator system having the safety system.

An elevator brake, having a rotatable component mounted to a shaft, is monitored for contamination by projecting electromagnetic radiation onto the rotatable component or onto the shaft, and receiving reflected electromagnetic radiation. If the monitored zone on the rotatable component or the shaft becomes contaminated, for example with oil or grease, the nature of the electromagnetic radiation reflected from the zone will change noticeably.

An elevator system (34) comprises a plurality of elevators (1) each of the elevators (1) comprising: a diagnostic unit (17) which is configured for running at least one diagnostic routine checking components of the elevator (1) and providing elevator operation and diagnosis data; a communication unit (30), which is configured for transmitting the elevator operation and diagnosis data provided by the diagnostic unit (17) to a remote diagnostic system (40); and for receiving control commands from said remote diagnostic system (40); and a control unit (14), which is configured for executing the control commands received by the communication unit (30). The elevator system (34) further comprises a diagnostic system (40) comprising at least one data receiving unit (42), which is configured for receiving the elevator operation and diagnosis data transmitted from the communication unit (30); at least one storage unit (44), which is configured for storing elevator operation and diagnosis data; at least one analyzing unit (46), which is configured for automatically analyzing the elevator operation and diagnosis data received by the at least one receiving unit (42) in order to detect a malfunction of an elevator (1); and at least one instruction unit (48), which is configured for sending instructions to the communication unit (30) of an elevator (1), for which a malfunction has been detected, instructing the control unit (14) of said elevator (1) to perform at least one specific action in order to overcome a detected malfunction.

The present invention provides an elevator system which prevents interruption of communication with a wireless communication device installed in a car, while suppressing the cost. The elevator system includes the car ascending/descending in a hoistway, multiple hoistway wireless communication devices installed in the hoistway, and a car wireless communication device installed in the car. The elevator system is configured to allow communication between the hoistway wireless communication device and the car wireless communication device. A spacing between the hoistway wireless communication devices which are installed at positions near a vertical center of the hoistway is smaller than a spacing between the hoistway wireless communication devices which are installed at positions farther from the vertical center.

An elevator system 2 is provided which comprises: a hoistway 6 accessible by at least one hoistway door 10a, 10b, 10c; at least one elevator car 4 located in the hoistway 6; a hoistway door switch 12a, 12b, 12c associated with the at least one hoistway door 10a, 10b, 10c; at least one inspection switch 16; at least one emergency stop switch 18; and an elevator controller 24. The elevator controller 24 is configured to monitor the hoistway door switch 12a, 12b, 12c, the inspection switch 16 and the emergency stop switch 18 and to prevent inspection mode operation of the elevator car 4 until at least one change of state is detected of each of the hoistway door switch 12a, 12b, 12c, the inspection switch 16 and the emergency stop switch 18.

A high pressure hose that is resistant to microvoid formation includes an inner tube comprising a blend of crosslinked fluoroplastic material and fluoroelastomeric material, a first reinforcement layer constructed of para-aramid synthetic fibers, and an adhesive layer, and an outer cover.

An elevator operating device for inputting a travel request on a floor of a building has a touch-sensitive screen system, which has a screen region that is visible to a passenger, and a central control device. The central control device controls the screen system in a first mode, to display a first graphical user interface, and in a second mode, to display a second graphical user interface. The first graphical user interface comprises one or two travel direction symbols. The second graphical user interface comprises an edge zone for symbolizing a waiting time until the elevator car arrives on the floor, and a center zone for symbolizing an occupancy of the elevator car by passengers, wherein a displayed degree of filling of the center zone symbolizes an occupancy of the elevator car.

A bridge device and a bridging method are used to monitor an elevator. The bridge device includes a jumper for bridging an electric element of the elevator when the elevator works in a first operating mode, a monitoring means monitoring the jumper, and an alarm unit that generates an alarm signal if the monitoring means determines that the element has been bridged by the jumper longer than a predefined time period when the elevator is operated in a second operating mode.

A door system for an elevator installation having an elevator car with a car door arranged to travel in an elevator shaft with shaft doors, wherein the car door is spaced from the shaft doors in a closed position of the door system. A primary pivot spindle is coupled to a pivotable door leaf of the shaft door or the car door and a secondary pivot spindle is coupled to a pivotable door leaf of the other of the car door and the shaft door. A drive unit includes a driven, pivotably mounted shaft to which a first entrainer and a second entrainer are fixed. During a pivoting movement of the shaft, the first entrainer engages a first counterpart element on the primary pivot spindle and the second entrainer engages a second counterpart element on the secondary pivot spindle to effect a pivoting movement of the door leaves.

A door system for an elevator installation having an elevator car, the door system including a pivotable first car door leaf mounted at a car door opening and a pivotable first shaft door leaf mounted at a shaft door opening of the elevator installation. At least a part of the shaft door opening is closed by the first shaft door leaf in a closed position thereof and a shaft door plane is formed along the shaft door leaf. At least a part of the car door opening is closed by the first car door leaf in a closed position thereof and a car door plane is formed along the car door leaf. The car door leaf, in an open position thereof, extends through the shaft door plane, or the shaft door leaf, in an open position thereof, extends through the car door plane.