Patent ID: 7891467

Claim:
A safety arrangement for implementing safety spaces in an elevator shaft, said safety arrangement comprising: a mechanical safety which can be moved to a working position to ensure a sufficient safety space in the elevator shaft, and an electric safety system comprising: at least one first detector for identifying the operating state of the mechanical safety device, and at least one second detector for identifying the position of a landing door, means for reading the at least one second detector; at least one third detector for identifying the position of an elevator car door, and means for reading the at least one third detector; an electric safety controller, which reads data from the detectors, and based on the data obtained, controls a mechanical stopping device which prevent movement of the elevator car in the elevator shaft; elevator control devices; a data interface bus between the electric safety controller and the elevator control devices wherein the safety arrangement comprises two separate sets of end limit markers for determining the position of the elevator car, a first set located closer to the ends of the elevator shaft determine the extreme limits of elevator car movement during normal operation while a second set located farther away from the ends of the elevator shaft than the first set determine the extreme limits of elevator car movement during maintenance operation, and readers of the end limit markers are fitted with the elevator car, said readers being connected to the electric safety controller via the data interface bus.