Ski brake

A ski brake mountable on the upper surface of a ski and comprising at least one arresting arm forming a blade, means pivotably mounting the arm on the upper surface of the ski for movement between an inactive position above the ski, and an active position in which said blade projects under the ski, actuator means including an elastic means for causing the blade to travel from its inactive position to its active position, a step-on-pedal, for engagement by a boot, means pivotably supporting the step-on pedal on the upper surface of the ski in a position projecting above the upper surface of the ski and means connecting the step-on pedal with the blade to displace the blade to inactive position when the boot is applied on the ski, said elastic means comprising first and second spring means, and means for transmitting the force of said first and second spring means to said blade, said first spring means including an auxiliary spring of low tension, said force transmitting means transmitting the force of the auxiliary spring on the blade until said blade attains a critical intermediate position between said active and inactive positions, said second spring means including a main spring of high tension, said force transmitting means transmitting the force of the main spring to said blade at a position in which the main spring will not produce rotation of the blade until said blade reaches said critical intermediate position whereafter the force of said main spring is transmitted to the blade at a position to produce rotation of said blade, said force transmitting means transmitting the force of the main spring conjointly with the first spring means at least during a portion of the remainder of the travel from the critical intermediate position to the active position.