Abstract: An inertia locking seat belt retractor for winding a shoulder belt having one end mounted on the vehicle door to move the belt between stowed and restraining positions upon movement of the door. The retractor has a winding prevention mechanism including a pawl and ratchet for selectively blocking belt winding rotation of the belt reel to hold the belt extended at a set length to establish a slackened comfort condition relative the occupant. A manually actuatable control device has a normal condition blocking control of the pawl by a control disc frictionally clutched to the reel and is manually actuatable to release the pawl for control by the disc. The control disc actuates the pawl to provide the set length, defines a range of unwinding wherein the pawl is temporarily deactuated to permit subsequent rewinding to return the belt to the set length, and disengages the pawl upon still further unwinding rotation so that the pawl is deactuated upon belt unwinding during opening of the door.

Abstract: A vehicle includes an inflatable occupant restraint cushion inflated from an inflater. The inflater is of the air-augmented type and includes a pressure vessel containing gas under pressure and a gas generator. The outlet of the vessel to the cushion is sealed by a diaphragm rupturable by electrically fired detonators. The gas generator is actuated by either an electrically fired pyrotechnic delay squib or by a nondelay pyrotechnic squib. A pair of low level acceleration responsive sensors connect the detonators and the delay squib across a source of power. When the vehicle is subjected to an impact generating a pulse above a predetermined minimum amplitude and time and below a predetermined maximum, the sensors fire the delay squib and the detonators. The gas is immediately released to initiate partial inflation of the cushion. After a predetermined time interval, the delay squib actuates the gas generator to complete inflation of the cushion.