Abstract: Elevator system governors include a housing, a first pulley, a second pulley, and a cable wound about the two pulleys. A target element is arranged on at least one of the pulleys and a motion sensor assembly is arranged to detect the target element and determine if an overspeed condition is present. An electromagnet is operably coupled to the motion sensor assembly that is configured to transition the electromagnet from a first electromagnetic state to a second electromagnetic state in response to a detected overspeed condition. A trigger arm is releasably connected to the electromagnet and configured to actuate a safety brake assembly with a biasing element arranged to bias the trigger arm into an actuated state with a magnetic force of the electromagnet being greater than a biasing force of the biasing element when the electromagnet is in the first electromagnetic state.

Abstract: Elevator systems include a traveling component and a guide rail within an elevator shaft. An overspeed safety system is operably connected to the traveling component and includes a brake assembly and an actuator assembly. A trigger element is configured to release stored energy of a stored energy device to cause engagement of a safety brake element with the guide rail to travel of the traveling component. When the safety brake element is engaged with the guide rail, upward motion of the traveling component causes the safety brake element to disengage from the guide rail and return the stored energy device to a state of stored energy.

Abstract: An elevator car is provided and includes a body and an actuation system. The body includes a floor, sidewalls and a ceiling movable relative to the sidewalls. The actuation system is coupled with the ceiling and operable to raise and lower the ceiling.

Abstract: An elevator system in which an elevator car travels in a hoistway is provided. The elevator system includes an anchor, a tensioning mass, a car-mounted governor (CMG) affixable to the elevator car, a rope and a processing board. The CMG includes idler and traction pulleys and at least one encoder mountable on one of the idler and traction pulleys and configured to generate a signal reflective of rotation of the one of the idler and traction pulleys on which the at least one encoder is mounted. The rope is extendible from the anchor, around the idler and traction pulleys and to the tensioning mass to cause idler and traction pulley rotation when the elevator car travels in the hoistway. The processing board is receptive of the signal and is configured to determine at least a position of the elevator car in the hoistway from the signal.