A fall arrest device comprises a casing with an entry hole for the wire rope, and an exit hole for the wire rope, and a clamping mechanism and an overspeed detector arranged inside the casing. The speed detection mechanism comprises a driven roller arranged to be driven by the wire rope. The driven roller has one or more selected areas to be detected by a sensor, and the device further comprises a motion indicator configured to receive a signal from the sensor when the sensor detects one of the selected areas. The motion indicator is configured to give different indications depending on whether or not the signal is received from the sensor, and such indications are detectable from outside the casing. Methods for operating such a fall arrest device and method for retrofitting fall arrest devices are also disclosed.

An elevator system (2) comprises a hoistway (4) extending between a plurality of landings (8a, 8b, 8c); an elevator car (60) configured for moving in two opposite directions along the hoistway (4); and an elevator safety system (1). The elevator safety system (1) comprises at least one safety gear (20) configured for moving along the hoistway (4) and, upon activation, braking movement the elevator car (60); at least one mobile safety node (43, 45) configured for moving along the hoistway (4) with the at least one safety gear (20) and for controlling the at least one safety gear (20); and at least one stationary safety node (42, 44). The elevator safety system (1) further comprises a communication bus (17) connecting the safety nodes (42-45) with each other and allowing the safety nodes (42-45) to communicate with each other.

An elevator system (2) comprises a hoistway (4) extending between a plurality of landings (8a, 8b, 8c); an elevator car (60) configured for moving in two opposite directions along the hoistway (4); and an elevator safety system (1). The elevator safety system (1) comprises at least one safety gear (20) configured for moving along the hoistway (4) and, upon activation, braking movement the elevator car (60); at least one mobile safety node (43, 45) configured for moving along the hoistway (4) with the at least one safety gear (20) and for controlling the at least one safety gear (20); and at least one stationary safety node (42, 44). The elevator safety system (1) further comprises a communication bus (17) connecting the safety nodes (42-45) with each other and allowing the safety nodes (42-45) to communicate with each other.

An elevator system (2) comprises a hoistway (4) extending between a plurality of landings (8a, 8b, 8c); an elevator car (60) configured for moving in two opposite directions along the hoistway (4); and an elevator safety system. The elevator safety system comprises a bidirectional safety gear (20) configured for stopping, upon activation, any movement of the elevator car (60) traveling in any of the two opposite directions; and a safety controller (30) configured for activating the bidirectional safety gear (20) when a predefined safety condition is met. The safety controller (30) is switchable between a plurality of different safety modes, each safety mode setting at least one predefined safety condition.

An elevator system (2) comprises a hoistway (4) extending between a plurality of landings (8a, 8b, 8c); an elevator car (60) configured for moving in two opposite directions along the hoistway (4); and an elevator safety system. The elevator safety system comprises a bidirectional safety gear (20) configured for stopping, upon activation, any movement of the elevator car (60) traveling in any of the two opposite directions; and a safety controller (30) configured for activating the bidirectional safety gear (20) when a predefined safety condition is met. The safety controller (30) is switchable between a plurality of different safety modes, each safety mode setting at least one predefined safety condition.

A frictionless electronic safety actuator (100; 202), for use in an elevator system, includes a magnetic plate (104); an electromagnet (102); a linkage (136); a biasing arrangement (106); and a path-constraining arrangement (112). The linkage (136) is actuatable so as to move a safety brake (204) into frictional engagement with an elevator guide rail (206). The linkage (136) is attached to the magnetic plate (104) and is moveable between a first position in which the linkage (136) is actuated and a second position in which the linkage (136) is not actuated. The biasing arrangement (106) is arranged to apply a biasing force to the magnetic plate (104) to bias the magnetic plate (104) towards the first position.

An elevator assembly with a rack-and-pinion drive including a tower and an elevator. The elevator assembly is designed to allow the autonomous inverse assembly of the tower on a shaft and/or a gallery during excavation processes. The elevator assembly descends along a suspended tower as far as a bottom end of the tower to convey mast sections to be assembled under the tower. The mast sections to be assembled are positioned for fishplating thereof, one by one, by means of a movable deck of the elevator assembly. A inverse assembly method, a docking method, and a method for dismantling the elevator assembly are also provided.

An elevator assembly with a rack-and-pinion drive including a tower and an elevator. The elevator assembly is designed to allow the autonomous inverse assembly of the tower on a shaft and/or a gallery during excavation processes. The elevator assembly descends along a suspended tower as far as a bottom end of the tower to convey mast sections to be assembled under the tower. The mast sections to be assembled are positioned for fishplating thereof, one by one, by means of a movable deck of the elevator assembly. A inverse assembly method, a docking method, and a method for dismantling the elevator assembly are also provided.

An elevator safety clamp control device, an elevator safety apparatus and an elevator system. The elevator safety clamp control device includes an operating portion arranged on a running device running along an elevator guide rail and connected to an elevator safety clamp, the operating portion release kinetic energy when controlled to enter a second state from a first state of energy storage, for actuating the elevator safety clamp to engage with the elevator guide rail to stop the running device; a control portion configured to control the operating portion to be in the first state, and to control the operating portion to enter the second state from the first state to release kinetic energy when an operating parameter of the running device exceeds a threshold; and a power portion arranged on the running device and connected to the operating portion.

A frictionless electronic safety actuator (100; 202), for use in an elevator system, includes a magnetic plate (104); an electromagnet (102); a linkage (136); a biasing arrangement (106); and a path-constraining arrangement (112). The linkage (136) is actuatable so as to move a safety brake (204) into frictional engagement with an elevator guide rail (206). The linkage (136) is attached to the magnetic plate (104) and is moveable between a first position in which the linkage (136) is actuated and a second position in which the linkage (136) is not actuated. The biasing arrangement (106) is arranged to apply a biasing force to the magnetic plate (104) to bias the magnetic plate (104) towards the first position.