An actuation device (24) for an elevator safety device (20) configured for moving in a longitudinal direction along a guide member (14, 15) of an elevator system (2), comprises a base (25) and a lever (26). The lever (26) is pivotably supported by the base (25) in a configuration allowing the lever (26) to pivot between an engaged position, in which at least a portion of the lever (26) or an element (27, 46) moving concurrently with the lever (26) contacts the guide member (14, 15); and a disengaged position, in which neither the lever (26) nor an element (27, 46) moving concurrently with the lever (26) contacts the guide member (14, 15). The lever (26) is also shiftable with respect to the base (25).

The system comprises a synchronization shaft rotatably supported on an elevator car frame, the synchronization shaft being operatively connected to at least one safety gear, a lever attached to the synchronization shaft, an electromagnet operatively connected to the lever, spring means operatively connected to the synchronization shaft, and resetting means operatively connected to the synchronization shaft. Deactivation of the electromagnet releases the lever allowing the spring means to rotate the synchronization shaft from a first position to a second position in which the safety gear is activated. Activation of the resetting means rotates the synchronization shaft from the second position to the first position in which the safety gear is deactivated and the spring means is brought back to the excited state at the same time.

The system comprises a synchronization shaft rotatably supported on an elevator car frame, the synchronization shaft being operatively connected to at least one safety gear, a lever attached to the synchronization shaft, an electromagnet operatively connected to the lever, spring means operatively connected to the synchronization shaft, and resetting means operatively connected to the synchronization shaft. Deactivation of the electromagnet releases the lever allowing the spring means to rotate the synchronization shaft from a first position to a second position in which the safety gear is activated. Activation of the resetting means rotates the synchronization shaft from the second position to the first position in which the safety gear is deactivated and the spring means is brought back to the excited state at the same time.

Elevator systems are provided. The elevator systems include a traveling component movable along a guide rail within an elevator shaft, the traveling component comprising a roller guide moveably engageable with the guide rail and an overspeed safety system. The overspeed safety system includes an actuator module operably coupled to the roller guide and a safety brake operably connected to the actuator module by a connecting link, wherein a safety brake element of the safety brake is operable to engage with the guide rail to stop movement of the traveling component.

A method for dynamically adjusting a levelling speed limit of an elevator car during a levelling operation includes obtaining an indication that the elevator car is detected to arrive to a zone; obtaining at least one value indicating the speed of the elevator car, in response to detecting that the elevator car arrives to the zone; and dynamically adjusting the levelling speed limit of the elevator car based on the speed of the elevator car. An elevator control unit and a system are provided to perform at least partly the method.

A method for dynamically adjusting a levelling speed limit of an elevator car during a levelling operation includes obtaining an indication that the elevator car is detected to arrive to a zone; obtaining at least one value indicating the speed of the elevator car, in response to detecting that the elevator car arrives to the zone; and dynamically adjusting the levelling speed limit of the elevator car based on the speed of the elevator car. An elevator control unit and a system are provided to perform at least partly the method.

An overspeed protection switch, an overspeed governor assembly and an elevator system are provided by the present disclosure. The overspeed protection switch includes: a trigger device including a trigger member and at least one protrusion, wherein the trigger member is capable of rotating to a triggered position from an untriggered position when being toggled, and the at least one protrusion is connected to the trigger member and rotates together with the trigger member; an actuation device including an action end capable of performing a linear movement; and a reset member which is connected with the action end of the actuation device and is translated with the linear movement of the action end of the actuation device so as to push one of the at least one protrusion to drive the trigger member to return to the untriggered position from the triggered position.

In an elevator system, so as to avoid unwanted safety gear tripping, the kinetic energy, which is caused by inertia of the overspeed governor rope to the lever arm, is dissipated by implementing fluid viscous damping to dampen the rotary movement of the spindle shaft to prevent unwanted safety gear tripping in the event when the upwards movement of the moving mass is decelerated by a machinery brake to perform a quick stop of the moving mass. The fluid viscous damping is effected by a viscous fluid damper which is arranged in the synchronization linkage mounted to the moving mass.

A car mounted governor (12) for an elevator system includes an overspeed pulley (38) configured to be secured to an elevator car of an elevator system. The overspeed pulley is configured to detect an overspeed condition of the elevator car via a rate at which a governor cable (42) passes around the overspeed pulley. The car mounted governor further includes a free pulley (40) configured to be secured to the elevator car with the governor cable routed over the free pulley. A tensioning device (64) is located at the free pulley and is operably connected thereto to maintain a select tension on the governor cable.

The present disclosure relates generally to a selectively operable safety brake including a magnetic brake operably coupled to a rod and disposed adjacent to a metal component, the magnetic brake configured to move between an engaging position and a non-engaging position, said magnetic brake, when in the engaging position contemporaneously with motion of the machine, moving the rod in to thereby move the safety brake from the non-braking state into the braking state, and an electromagnetic component including a retention apparatus, the electromagnetic component configured to move the magnetic brake from the engaging position to the non-engaging position upon receipt of a resetting signal.