Abstract: A method for monitoring shaft doors of a elevator installation uses at least one contactlessly acting shaft door monitoring sensor to emit a beam of electromagnetic waves, wherein at least during specific detection phases the beam extends over several floors and is detected by a receiver. The beam is influenced by a shaft door panel not being completely closed and/or a shaft door lock not being disposed in the locking setting such that a disturbance signal is generated to the elevator control.

Abstract: A powerless emergency elevator includes guide rails (2) erected vertically; an elevator car (6) supported by a flexible rope (4) so as to be movable along the guide rails; a lock mechanism (7) provided on a top of the elevator car and biased in a locking direction for locking the elevator car to the guide rails; a power transmission path (9) extends upwardly from a floor plate (8) of the elevator car to the lock mechanism; a clutch mechanism (10) provided between the lock mechanism and the power transmission path for connecting or disconnecting the lock mechanism to the power transmission path; an auxiliary lock mechanism (11) provided on a side wall of the elevator car for releasing the clutch mechanism at evacuation and exit floors to thereby cut off the power transmission path; a handle (12) provided within the elevator car; a lock releasing mechanism (13) provided in the power transmission path for releasing the lock mechanism via the power transmission path by manipulating the handle; a lock releasing me