Abstract: A device for winding up a safety belt is locked in response to a change of inertia of the device housing. The device includes two elements at least one of which is a rotatable member having a pulley at one end with a band wound around it. An end of the band extends from the pulley and is connected to the safety belt. One end of the rotatable member is arranged adjacent the other element in the housing. A locking member is moved by its own inertia in response to an inertial change in the device housing and is engaged between the two elements to lock rotation of the rotatable member.

Abstract: A lock including a closing member and a retaining member at least one of which is movable to engage with the other. One of said members being biased into engagement with the other by a return spring to ensure the lock being in the fully closed position.

Abstract: A safety belt system for a motor vehicle having both ends of the main belt or strap secured or anchored, one removably, to the side of the motor vehicle. An intermediate anchoring point is provided by an auxiliary strap connected at one end to a self-rolling device affixed to the motor vehicle applying tension to the auxiliary strap and at the other end to a sliding strap buckle through which the main belt or strap is slidably engaged. The end anchoring points of the main belt are located at different levels with the removably anchored end being substantially at the seat level of the motor vehicle. The motor vehicle further includes one or more retaining hooks which hooks may be deformable and which are located at the top of the motor vehicle door. The hook may be at the front of the seat which may be combined with a hook in the plane of the back of the seat or the hook may be in the middle of the top of the motor vehicle. The main belt is placed over the hook by the user when the belt is not in use.