Inflator assembly

An apparatus (10) for use in inflating a vehicle occupant restraint (12) includes a storage chamber (18) containing a mixture of gases which is releasable to inflate the vehicle occupant restraint (12). The mixture of gases includes a combustible fuel gas which, when burning, produces first combustion products which pressurize and supplement the mixture of gases. The apparatus (10) also includes an actuator assembly (16) for igniting the combustible fuel gas. The actuator assembly (16) includes a movable container (104) in which an ignitable material (122) is contained. The ignitable material (122) in the movable container (104), when burning, produces second combustion products which ignite the combustible fuel gas. The actuator assembly (16) casts the movable container (104) across the storage chamber when the second ignitable material (122) is burning.