Abstract: The object of the invention is an elevator provided with a safety apparatus arrangement, which elevator comprises at least an elevator car traveling along guide rails and a safety brake device, such as a safety gear, for stopping undesired movement of the elevator car, as well as a transmission mechanism for activating the safety gear. The safety apparatus arrangement comprises a tuning apparatus disposed on the elevator car for detecting a presence on the roof of the elevator car, which tuning apparatus comprises means for pre-activating the transmission mechanism when a presence on the roof of the elevator car has been detected.

Abstract: The object of the invention is an elevator provided with a safety device arrangement, which elevator comprises at least an elevator car traveling along guide rails and a safety brake device for stopping unintended movement of the elevator car. The safety device arrangement comprises a tuning apparatus disposed on the elevator car for detecting a presence on the roof of the elevator car.

Abstract: The invention refers to an elevator rescue system (10) for moving an elevator car of an elevator in an emergency situation, which elevator includes an elevator motor acting on hoisting ropes by which the elevator car is suspended and/or moved, which elevator motor comprises at least one electro-mechanical brake (14a, 14b) and an encoder outputting a signal corresponding to its speed, which system comprises a back-up power source (36), a jerk monitoring circuit (22) connected to the encoder and comprising a memory (28) for at least one first upper threshold value for the car acceleration and/or its derivation, a brake feed circuit (16) which is controlled by the jerk monitoring circuit, at least one release switch (24) which is connected to the jerk monitoring circuit and/or to the brake feed circuit, in which system the operation of the release switch activates the brake feed circuit to release the brake, and initiates the jerk monitoring circuit to compare the car acceleration and/or its derivation as de

Abstract: The invention relates to an interface unit, a conveying system and a method. The interface unit comprises an input circuit for the signal determining the safety of the conveying system. The interface unit further comprises means for testing the operating condition of the input circuit.

Abstract: A method and a safety device for implementing the method are provided in connection with a quick stop situation of an elevator. In the method, an activation process of a machinery brake is started and also a disconnection process of the current supply of the elevator motor is started after the starting of the activation process of a machinery brake.

Abstract: A backup circuit for supplying electricity to an electronic overspeed governor in connection with a malfunction of a main electricity supply is disclosed. The backup circuit includes an energy storage. The backup circuit is configured to disconnect the supply of electricity from the energy storage to the electronic overspeed governor with a delay when the malfunction of the main electricity supply is detected, and when the malfunction of the main electricity supply continues for a predetermined amount of time, restarting the supply of electricity from the energy storage to the electronic overspeed governor.

Abstract: The invention concerns the automatically detection and analysis of jerks arising when an elevator car starts its ride carrying out a determination of an elevator run sequence by an elevator controller, measuring an elevator car movement with a sensor at a predetermined phase of the elevator run sequence, and determining an elevator car sway from the sensor data, further comparing the determination result with a pre-set criteria, and being followed by outputting the comparison result.

Abstract: The invention relates to an interface unit, a conveying system and a method. The interface unit comprises an input circuit for the signal determining the safety of the conveying system. The interface unit further comprises means for testing the operating condition of the input circuit.

Abstract: A method for performing an emergency stop with an elevator and a safety arrangement of an elevator are disclosed. In the method, when an emergency stop criterion is fulfilled, the elevator car is driven with the electric motor of the hoisting machine to a stop with a given deceleration profile.

Abstract: A method for controlling an elevator includes controlling the speed of a vertically moving elevator car during its run from a starting landing to a destination landing according to speed settings, the speed settings defining a constant target speed for the elevator car. The method includes obtaining measurement data of the ongoing run, which measurement data describes vertical speed and/or vertical acceleration of the vertically moving elevator car, determining whether the measurement data meets one or more predetermined criteria indicating unintended vertical speed and/or unintended vertical acceleration, and changing the speed settings of the current run by lowering the constant target speed from a first constant target speed to a second constant target speed if the measurement data meets said one or more predetermined criteria, continuing the run without intermediate stops to said destination landing. An elevator is provided to implement the method.

Abstract: According to few examples a safety system, a method and a computer program for an elevator safety system is provided. A first switch configured to detect a first position of a safety device of an elevator. A second switch configured to detect a second position of the safety device. A controller configured to monitor a change of a state of the first switch and a change of a state of the second switch.

Abstract: The purpose of the invention is to detect a failure situation wherein the machinery brake of an elevator does not open sufficiently. In the method for testing failure of a machinery brake of an elevator: the machinery brake is controlled to open; after this, the traction sheave is oscillated with a test torque; the movement of the elevator machine is measured in connection with the oscillation; if the machine does not move in connection with the oscillation, it is deduced that the machinery brake has not opened and has therefore failed. Most preferably a shorter time is selected as the oscillation time than the time according to the displacement function of the elevator mechanics for transmitting movement of the traction sheave into movement of the elevator car, in which case the oscillation is not noticed in the elevator car. This enables testing of a machinery brake when the elevator car is manned.

Abstract: An elevator has a safety controller to which several safety switch arrangements are connected. The safety controller is configured to cause the stop of the elevator motor and the activation of the motor brakes. A comparator is provided in the safety controller for the determination of the status of the safety chain. The comparator is connected with a memory for storing at least one resistor reference value, which comparator is configured to output a safety chain status signal in dependence of comparison of a measured resistance value with the resistor reference value. Each of said safety switch arrangements includes at least one first resistor and a safety switch which are connected in series. The value of the first resistor is different in at least some safety switch arrangements, preferably in all safety switch arrangements. Each safety switch arrangement includes at least a second resistor connected in parallel with the safety switch, which second resistor has a higher value than the first resistor.

Abstract: In an elevator, the status information of the receivers, and possibly also of the transmitters, of a light curtain of the elevator is transmitted from the control unit of the light curtain as a response to a query or as messages. The control system of the elevator car is configured to receive the responses or status information and to analyze i) the status information contained therein of at least one receiver the status information contained therein of at least one receiver and of at least one transmitter relating to it, for changing or adjusting the operating mode of the elevator or for giving a control command to the operating system of the elevator.

Abstract: The invention concerns a portable user interface and a system utilizing the user interface for the collection and processing of information relating to elevator maintenance. Said user interface comprises means for transferring information between the user interface and an elevator control unit and between the user interface and an elevator maintenance database server.

Abstract: A method and an arrangement are provided for monitoring the safety of a counterweighted elevator. In the method, an elevator car is driven with a hoisting machine towards the top end of the elevator hoistway, contact between the counterweight and the end buffer of the elevator hoistway is determined, a reference point for the location of the elevator car is registered when detecting contact between the counterweight and the end buffer, the distance that the elevator car travels onwards from the aforementioned reference point for the location is measured, and if the distance traveled by the elevator car onwards from the aforementioned reference point exceeds a threshold value a signal indicating a risk of slackening of the traction rope is formed.

Abstract: A safety arrangement of an elevator and a method for monitoring electrical safety in an elevator system is disclosed. The safety arrangement of an elevator includes a motor drive of the elevator, which motor drive includes a main circuit, an accessible conducting part, which is earthed, an insulator, which is adapted to electrically insulate the aforementioned conducting part from the aforementioned main circuit and also a monitoring circuit, which is configured to determine an earth fault of the aforementioned main circuit occurring via the aforementioned conducting part. The monitoring circuit is configured to form a signal indicating the danger of electric shock in the motor drive of the elevator, if the aforementioned earth fault is diagnosed.

Abstract: A braking apparatus is provided for braking the rotating part of a hoisting machine. The braking apparatus includes one or more brakes, which contain altogether at least one movable brake shoe, spring elements for activating the brake by moving the brake shoe forward, at least two electromagnets, which, when magnetized by a magnetizing current, apply a force of attraction to bodies conducting magnetic flux. The electromagnets are fitted to release the brake by pulling the brake shoe backwards by resisting the spring elements. The brake is fitted to be activated by reducing the magnetizing current of the electromagnet. The braking apparatus includes a power supply circuit for the electromagnets, which contains controllable power supply interrupting devices. The electromagnets are connected to the power supply circuit in such a way that the supply of magnetizing current to each electromagnet can be interrupted by means of at least two different interrupting devices.

Abstract: The invention allows inspection tests for an elevator without additional test weights. An empty elevator car and its counterweight are balanced by filling in weight pieces to the counterweight. 100% load of the elevator car in regard to unbalance is configured by moving unused counterweight pieces inside the elevator car. Inspection tests requiring the 100% load in regard to unbalance are performed. 125% load of the elevator car is simulated with 50% load and 125% speed of the elevator car. Inspection tests requiring the 125% load in regard to unbalance are performed. A final counterweight is configured by moving its weight pieces from the elevator car to the counterweight. Inspection tests requiring the final counterweight are performed.

Abstract: A method and a safety arrangement are provided for monitoring the movement of an elevator component, more particularly of an elevator car or of the automatic door of an elevator. In the method, a setup drive of an elevator component is run, and the speed and/or acceleration of the elevator component is measured during the setup drive, a threshold value for the speed and/or acceleration of the elevator component is formed on the basis of the measuring data obtained in the setup drive, the speed and/or acceleration of the elevator component is measured, and if the measured speed and/or acceleration exceeds the aforementioned threshold value, a monitoring signal for bringing the elevator to a safe state is formed.