An elevator suspension member arrangement includes a monitoring arrangement monitoring an integrity status of suspension members having electrically conductive cords. The monitoring arrangement includes: a generator generating phase shifted first and second alternating voltages; input and output connectors each establishing electrical contacts to cords in one of the suspension members; a voltage analyzer measuring and analyzing a neutral point voltage resulting from applying the first and second alternating voltages to first and second cords of the one suspension member; a supply circuitry having supply lines electrically interconnecting the generator with the input connectors; and a measurement circuitry including measurement lines electrically interconnecting the analyzer with at least one of the input connectors and the output connectors. The supply and measurement lines are separated from each other whereby disturbing influences of impedances through the supply circuitry is minimized due to voltage measurements being performed through the separate measurement circuitry.

An elevator safety system comprises a plurality of door safety units, each door safety unit; a communication bus connecting the plurality of door safety units; a control unit connected to the communication bus for allowing communication between the plurality of door safety units and the control unit; and at least one position sensor configured for providing information about the current position of an elevator car within a hoistway. Each door safety unit is assigned to an elevator hoistway door and configured for monitoring a condition of the assigned elevator hoistway door. The control unit is configured for polling door safety units included in a subset S1, S2) of the door safety units which are located within a predetermined distance (D1, D2) from the current position of the elevator car.

A safety control device (1) for a people conveyor (101). The safety control device (1) includes a first safety control channel (2) configured to output a first safety control signal in response to one or more input signals (10, 12, 14), a second safety control channel (4) configured to output a second safety control signal in response to one or more input signals (10, 12, 14), and an override control channel (6) configured to: monitor the health of the first and second safety control channels (2, 4), determine whether a fault has occurred in either of the first or second safety control channels (2, 4), and override the first or second safety control signal in response to a determination that a fault has occurred in the corresponding safety control channel (2, 4).

Multi-function stairlift connectivity includes a stairlift data collection system having data collection devices communicatively connected to a main controller. Such data collection devices may include sensors, switches, controllers, detectors, control boards, and location detectors providing data and settings in a stairlift (e.g., diagnostic information, system status data, faults, drive performance data). A communication module receives collected stairlift data and communicates wirelessly with a remote communication device. Waypoint detection may include stairlift carriage position detection employing electrical contacts on a stairlift carriage. Carriage position can be determined when the carriage stops at or passes a waypoint marker that includes electrical contacts connected to a waypoint element possessing a detectable electromagnetic characteristic (e.g., an identifiable resistive value). Where resistive value are used, waypoint locations can be determined by using a different resistive value for each waypoint.

A safety monitoring device monitoring safety-related states in a passenger conveyor system has first and second double contact relays each controlled by a control voltage to switch first and second normally open contacts and a feedback contact synchronously between an open and closed relay states. First and second controllers each determine properties of the system correlated with safety-related states and in dependence generate the control voltages. The controllers and two double contact relays form first and second safety monitoring switch arrangements for monitoring first and second safety-related states and correspondingly switch first and second switching states within a safety monitoring chain of the system. The first arrangement includes the first contact of the first connected in series with the first contact of the second relay. The second arrangement includes the second contact of the first relay connected in parallel with the second contact of the second relay.

The invention relates to an elevator apparatus, comprising: a shaft, an elevator car vertically movable in the shaft, one or more ropes connected with the car, and a controller for controlling movement of the car. In order to detect sway in one or more elevator ropes connected with the car, the apparatus comprises at least one sensor unit arranged in the elevator shaft to detect sway and to produce a control signal indicating to the controller the detected sway. The controller compares the detected sway to a predetermined limit and prevents movement of the elevator car when sway reaches the predetermined limit.

An illustrative example embodiment of an elevator door interface monitor includes at least one hook having a portion that is configured to be situated across the interface and moveable responsive to contact with an item situated at least partially in the interface. An indicator provides an indication of an item in the interface based on movement of the hook responsive to contact with the item.

A method of monitoring a conveyance apparatus within a conveyance system is provided. The method including: obtaining a starting location position probability distribution of the conveyance apparatus within the conveyance system; detecting motion of the conveyance apparatus away from the probable starting location for a period of time; determining a distance traveled by the conveyance apparatus during the period of time; determining a direction of motion of the conveyance apparatus during the period of time; and determining a probability of the conveyance apparatus being at each of a plurality of possible destination locations at a conclusion of the period of time in response to the starting location position probability distribution and at least one of the distance traveled, the direction of motion, and the period of time.

An illustrative example embodiment of an elevator system monitoring assembly includes a wind detector configured to detect wind in a hoistway and to provide a wind detector output regarding the detected wind. A processor is configured to receive the wind detector output, determine whether at least one characteristic of the detected wind satisfies at least one predetermined criterion corresponding to an effect on the elevator system, and provide an indication of at least one of the satisfied criterion and the effect on the elevator system.

An elevator system includes an elevator car, an elevator controller, and a safety controller, connected to a plurality of safety devices arranged to monitor the elevator system. The safety controller is configured to receive a signal in response to a change of state of any of the safety devices, and to determine a condition of the elevator system in response to the change of state of one or more of the safety devices. If the safety controller renders a determination that the elevator system is in a first condition, the safety controller causes an elevator brake to be deployed, preventing movement of the elevator car. If the safety controller renders a determination that the elevator system is in a second condition, the safety controller allows movement of the elevator car for a predetermined duration or until the elevator car has travelled a predetermined distance.