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.

The invention relates to an elevator system (10) for a building under construction, comprising a vertical shaft (12), in which a temporary machine compartment (14) is retained, a driving device (18), which is arranged in the temporary machine compartment (14) and which is coupled by means of a supporting cable (21) to a car (23) that can be moved vertically up and down in the shaft (12), and a speed limiter (30), which interacts with a speed limiter cable (34) arranged in the shaft (12). According to the invention, in order to develop the elevator system in such a way that the speed limiter cable (34) can be extended in a simple manner when the temporary machine compartment (14) is moved without said action leading to permanently increased energy consumption of the elevator system (10), the speed limiter (30) is arranged on the car (23) or on a counterweight (25) connected to the car (23) by means of the supporting cable (21), and that the speed limiter cable (34) has a first and second cable section (32, 52), wherein the first cable section (32) is clamped in a stationary manner between a cable retainer (46) connected to the temporary machine compartment (14) in a stationary manner and a releasable clamping device (50) arranged in a lower shaft region (48) and the second cable section (52) is connected to the first cable section (32) in the lower shaft region (48) and is stored in a storage region.

The invention relates to an elevator system (10) for a building under construction, comprising a vertical shaft (12), in which a temporary machine compartment (14) is retained, a driving device (18), which is arranged in the temporary machine compartment (14) and which is coupled by means of a supporting cable (21) to a car (23) that can be moved vertically up and down in the shaft (12), and a speed limiter (30), which interacts with a speed limiter cable (34) arranged in the shaft (12). According to the invention, in order to develop the elevator system in such a way that the speed limiter cable (34) can be extended in a simple manner when the temporary machine compartment (14) is moved without said action leading to permanently increased energy consumption of the elevator system (10), the speed limiter (30) is arranged on the car (23) or on a counterweight (25) connected to the car (23) by means of the supporting cable (21), and that the speed limiter cable (34) has a first and second cable section (32, 52), wherein the first cable section (32) is clamped in a stationary manner between a cable retainer (46) connected to the temporary machine compartment (14) in a stationary manner and a releasable clamping device (50) arranged in a lower shaft region (48) and the second cable section (52) is connected to the first cable section (32) in the lower shaft region (48) and is stored in a storage region.

Systems, apparatuses, and methods are described for a stairlift overspeed safety system are disclosed. The overspeed safety system may include a centripetal cam assembly, a trigger assembly, and a jammer assembly. The centripetal cam assembly may include a spring-loaded plate and a plurality of centripetal cams connected to the spring-loaded plate, configured to move to an extended position when the rail speed exceeds the speed threshold. The trigger assembly may include a trigger plate configured to be pushed by at least one of the centripetal cams when moved to the extended position. Pushing the trigger plate may cause a switch to open to shut off power to the motorized stairlift. The jammer assembly may include a jammer configured to wedge between teeth of a rack and pinion of the motorized stairlift to initiate a deceleration to stop movement of the motorized stairlift.

In a machine-room-less elevator, a hoisting machine is disposed directly above a counterweight. A counterweight speed governor is disposed higher than a position of the counterweight if a car descends to a floor portion of a hoistway and the counterweight jumps upward. When viewed from directly above, at least a portion of the counterweight speed governor is disposed at an identical position to a first counterweight guide rail in a width direction of the counterweight, and is disposed at an identical position to a portion of a suspending body between a driving sheave and a counterweight suspending sheave in a direction that is perpendicular to the width direction of the counterweight.

In a machine-room-less elevator, a hoisting machine is disposed directly above a counterweight. A counterweight speed governor is disposed higher than a position of the counterweight if a car descends to a floor portion of a hoistway and the counterweight jumps upward. When viewed from directly above, at least a portion of the counterweight speed governor is disposed at an identical position to a first counterweight guide rail in a width direction of the counterweight, and is disposed at an identical position to a portion of a suspending body between a driving sheave and a counterweight suspending sheave in a direction that is perpendicular to the width direction of the counterweight.

A safety actuation assembly for an elevator system including a housing, a speed sensing device disposed within the housing, wherein the speed sensing device comprises a proximal end, and a protection device disposed within the housing and located adjacent to the proximal end of the speed sensing device; the protection device configured to be placed in a first position when in a non-engaging position and in a second position when in an engaging position.

A safety actuation assembly for an elevator system including a housing, a speed sensing device disposed within the housing, wherein the speed sensing device comprises a proximal end, and a protection device disposed within the housing and located adjacent to the proximal end of the speed sensing device; the protection device configured to be placed in a first position when in a non-engaging position and in a second position when in an engaging position.

A brake assembly for an elevator system is provided and includes a guide rail configured to guide movement of an elevator car. Also included is a safety brake operatively coupled to the elevator car and having a brake surface configured to frictionally engage the guide rail. Further included is a safety brake actuation mechanism operatively coupled to the safety brake and configured to actuate the safety brake to a braking position. The mechanism includes a first sensing device disposed on a first side of the guide rail to detect a first condition reading of the elevator car relative to the guide rail. The mechanism also includes a second sensing device disposed on a second, opposite side of the guide rail to detect a second condition reading of the elevator car relative to the guide rail, the first and second condition readings collectively analyzed to determine an overall condition reading.

A brake assembly for an elevator system includes a guide rail configured to guide movement of an elevator car. Also included is a safety brake operatively coupled to the elevator car and having a brake surface configured to frictionally engage the guide rail. Further included is a safety brake actuation mechanism operatively coupled to the safety brake and configured to actuate the brake member to a braking position. The safety brake actuation mechanism includes a sensing device disposed at a distance from the guide rail to determine a speed of the elevator car relative to the guide rail. The safety brake actuation mechanism also includes a first rigid plate having an inner edge disposed at a distance from the guide rail that is less than the distance that the sensing device is spaced from the guide rail to prevent the sensing device from contacting debris disposed on the guide rail.