Importance

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Abstract

The present invention concerns a speed limiter for lifts provided with catch device. The tension force acting on the lifting rope of an elevator is greatly variable. A detrimental feature herein is the jerky stopping of the rope sheave, resulting in looping of the rope and delay of the onset of braking effect. The invention serves the object to eliminate these drawbacks and to provide an improved speed limiter. This is accomplished, as taught by the invention, starting from a speed limiter for lifts provided with catch device in which on a stationary axle is rotatably carried a rope sheave that can be driven by a rope connected with the catch device in that on the axle is mounted a pre-set brake for a braking element, such as a disk or a drum, rotatable with reference to the axle against the braking effect, and that one the rope sheave is rotatably carried at least one eccentric cam turnable by a centrifugal weight against the force of a return spring, this cam coming into engagement with the rotatable braking element when a specified triggering speed of the rope sheave is exceeded.

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First Claim