Show elevators foolproof among the innovations tn in the rev raw ambassador hotel park avenue and fifty first street new york are the micro self leveling type ot of elevators the first to be installed in new york NV hen the floor of the car Is exactly at the floor level the car stops then and not until then the doors may be opened passengers are thus protect ed by the double safety device one which does away mith all danger of stumbling or tripping and which also makes it impossible to open or close the doors of the elevator shaft until the car Is in the safe position |