of the biasing spring 40 fig1 therefore the seat belt 12 can be retracted from its extended condition after the cinch mechanism 82 has been operated to the engaged condition of fig9 to actuate the cinch mechanism 82 from the engaged condition of fig9 back to the disengaged condition of fig7 the seat belt 12 is wound back onto the spool 14 as the seat belt 12 is wound onto the spool 14 the increasing diameter of the rolled up portion of the seat belt pivots the web follower 88 in a clockwise direction from the position shown in fig9 toward the position shown in fig7 as this occurs the spring mounting pin 144 on the web follower 88 moves upwardly relative to the spring mounting arm 114 on the actuator member 86 when the predetermined portion of the seat belt is again wound on the spool the center of the spring mounting pin 144 on the web follower 88 moves above the central axis of the spring mounting arm 114 on the actuator member 86 the overcenter spring 90 then acts between the actuator member 86 and web follower to urge the actuator member 86 to rotate in a counterclockwise direction from the position shown in.