A stop lock for use in a barrier system

摘要

An extending member of a stop lock mechanism is engaged by a brake clasp. The extending member is held in an unlocked position using the brake clasp and permitting the rotating sprocket to rotate. Rotational motion is translated from the sprocket to the brake clasp so that an increased speed of a rolling barrier moving with the sprocket is translated from the rotating sprocket to the brake clasp. When an increased speed of the rolling barrier effects movement of the clasp via a centripetal force, the clasp releases the extending member to allow it to move along a longitudinal axis that extends through the clasp and the extending member. The extending member moves along the longitudinal axis into one of a plurality of arcuate openings in the sprocket to stop the rotation of the rotating sprocket and the downward movement of the rolling barrier.