Safety belt emergency locking retractor

An emergency locking retractor comprising a pair of mutually parallel frame members, a spool comprising a shaft to receive the belt, a respective disc, having teeth on its periphery, mounted adjacent to each end of the shaft, complementary locking formations on the frame members, bearing rotatably mounting the spool on the frame members so as to permit limited translational movement of the spool relative to the frame members in a direction perpendicular to the axis of rotation of said spool between an engaged position in which said teeth of said disc engage with said complementary locking formations on the frame members to inhibit rotation of the spool and a disengaged position in which the spool is free to rotate, resilient means biasing the spool into its disengaged position, and inertia responsive actuating means arranged to cause movement of the spool into its engaged position, wherein the actuating means comprises a rachet wheel mounted on the spool for rotation and translational movement therewith, a pivotally mounted control member, a pawl pivotally mounted on one of the control member and the ratchet wheel, ratchet teeth on the other of the control member and the ratchet wheel, and inertia responsive means for moving the pawl into engagement with the ratchet teeth so that angular movement of the ratchet wheel in the belt unwinding direction causes angular movement of the control member, such angular movement of the control member being arranged to cause movement of the spool into locking engagement with the frame members, the control member moving with the spool as the latter moves into locking engagement.