Safely brake for an elevator

A safety brake for an elevator, comprising

• a centrifugal regulator,
• a shaft, which rotates due to a coupling to the movement of the elevator,
• a brake having a first and a second brake part with friction surfaces facing each other, wherein said first brake part can move towards the second brake part, whereby the first brake part is rotatable with the shaft, and in a normal state is decoupled therefrom,
• a first spring assembly through the action of which the brake parts are spring-biased against each other with a certain pressure force, whereby the centrifugal regulator on release is arranged to couple the shaft to the first brake part to force a rotation thereon, wherein the safety brake comprises
• a pressure-relieving device provided to ease the said spring biasing, due to the rotation of the shaft, at the coupled shaft, by the centrifugal regulator and
• a switch mechanism acting between the centrifugal regulator and the shaft, which switch mechanism converts a torque in the switch mechanism into a translation movement moving the centrifugal regulator along the center-line of the shaft, to press the first brake part against the spring assembly's spring action moving the first brake part away from the second brake part, until a balanced position is obtained, whereby both brake parts frictionally slide against each other.