A braking system for a hoisted structure includes a guide rail configured to guide the hoisted structure. Also included is a plurality of brake members operatively coupled to the hoisted structure, each of the brake members having a brake surface configured to frictionally engage the guide rail, the brake members moveable between a braking position and a non-braking position. Further included is a plurality of electronic brake member actuation mechanisms operatively coupled to the brake members and configured to actuate the brake members from the non-braking position to the braking position. Yet further included is a load sensing device operatively coupled to the hoisted structure, the load sensing device configured to detect a weight of the hoisted structure, wherein the load sensing device is in operative communication with the electronic brake member actuation mechanisms, wherein the number of actuated mechanisms is dependent on the weight of the hoisted structure.

An overspeed governor assembly for an elevator system, an elevator safety system, and an elevator system. The overspeed governor assembly comprises an overspeed governor, a linkage provided to enable the overspeed governor to associate with a safety device of the elevator, when an elevator car overspeed is occurring, to trigger the safety device to perform safety measures, and at least one torsion spring coupled between a sheave and a centrifugal mechanism in the overspeed governor for providing a pre-set load, and the centrifugal force formed by the centrifugal mechanism when the elevator car overspeed is occurring, is greater than the pre-set load, for triggering the safety device via the linkage.

An overspeed governor assembly for an elevator system, an elevator safety system, and an elevator system. The overspeed governor assembly comprises an overspeed governor, a linkage provided to enable the overspeed governor to associate with a safety device of the elevator, when an elevator car overspeed is occurring, to trigger the safety device to perform safety measures, and at least one torsion spring coupled between a sheave and a centrifugal mechanism in the overspeed governor for providing a pre-set load, and the centrifugal force formed by the centrifugal mechanism when the elevator car overspeed is occurring, is greater than the pre-set load, for triggering the safety device via the linkage.

An elevator safety gear actuation device for actuating an elevator safety gear comprises a first member and a second member. The first and second members are arranged opposite to each other defining a gap configured for accommodating a guide member extending in a longitudinal direction. At least one of the engagement members comprises an engagement element which is movable in a direction transverse to the longitudinal direction between a disengaged position and an engaged position. The first engagement element comprises at least one permanent magnet which is configured for being magnetically attracted and attaching to the guide member extending through the gap when the engagement element is arranged in the engaged position. The second member comprises at least one additional permanent magnet which is configured for being magnetically attracted to the guide member extending through the gap.

An elevator safety gear actuation device for actuating an elevator safety gear comprises a first member and a second member. The first and second members are arranged opposite to each other defining a gap configured for accommodating a guide member extending in a longitudinal direction. At least one of the engagement members comprises an engagement element which is movable in a direction transverse to the longitudinal direction between a disengaged position and an engaged position. The first engagement element comprises at least one permanent magnet which is configured for being magnetically attracted and attaching to the guide member extending through the gap when the engagement element is arranged in the engaged position. The second member comprises at least one additional permanent magnet which is configured for being magnetically attracted to the guide member extending through the gap.

The present invention provides a safety device, an elevator safety system and an elevator system. The elevator safety system comprises the safety device which comprises a shell having a vertical passage for elevator guide rails to pass through, the safety device further comprises a first brake block on a first side of the vertical passage, and a second brake block on a second opposite side of the vertical passage; and a safety device carrier for supporting the safety device and fixedly connected to an elevator car; wherein the shell of the safety device is obliquely and movably mounted on the safety device carrier.

The present invention provides a safety device, an elevator safety system and an elevator system. The elevator safety system comprises the safety device which comprises a shell having a vertical passage for elevator guide rails to pass through, the safety device further comprises a first brake block on a first side of the vertical passage, and a second brake block on a second opposite side of the vertical passage; and a safety device carrier for supporting the safety device and fixedly connected to an elevator car; wherein the shell of the safety device is obliquely and movably mounted on the safety device carrier.

An elevator with a brake device may be configured to provide a variable brake force, from a minimum brake force up to a maximum brake force (Vmax). The brake device may include a first energy store that provides the maximum brake force and a second energy store that provides an adjustable counterforce. The adjustable counterforce may be directed in an opposed manner with respect to the maximum brake force provided from the first energy store. Further, the variable brake force may amount to a difference between the maximum brake force and the adjustable counterforce. In some cases, the first energy store may comprise a compression spring for providing the maximum brake force.

An elevator with a brake device may be configured to provide a variable brake force, from a minimum brake force up to a maximum brake force (Vmax). The brake device may include a first energy store that provides the maximum brake force and a second energy store that provides an adjustable counterforce. The adjustable counterforce may be directed in an opposed manner with respect to the maximum brake force provided from the first energy store. Further, the variable brake force may amount to a difference between the maximum brake force and the adjustable counterforce. In some cases, the first energy store may comprise a compression spring for providing the maximum brake force.

An elevator has a car, arranged to be moved along at least one guide rail in an elevator guide way, the car having a brake for braking the car movement by gripping the guide rail, the brake having a gripping device configured to grip the guide rail and exert a friction force thereon, and an adjusting device configured to adjust the gripping device with respect to its friction force exerted on the guide rails in case of braking. The adjusting device is configured to adjust the gripping device depending on the car position in the elevator guide way. With the above construction, emergency braking is allowed, particularly in higher and high rise elevators with a stopping distance which is mostly unaffected by the position of the elevator car in the guide way.