An elevator and a method, said elevator being preferably an elevator without machine room, and wherein the elevator car is supported by a set of hoisting ropes comprising one rope or a number of parallel ropes. The receiver system also generates equalizer output, and the demapper uses distance measure to calculate bit metrics. A coiled spring is disposed between the first hinge member and the second hinge member. A tooth height H2 of the plural teeth of the lock ring is specified to be lower than a tooth height of the plural teeth of the clutch plate.