Abstract: An automatic belt reel lock mechanism with a main housing, a reel axle with pertaining reel spring and a rolled-up belt as well as with a locking mechanism comprising a mass force sensor, a movably mounted locking pawl, a ratchet wheel and a control component which supports the mass force sensor and is mounted in the housing concentrically with the reel axle, and with a lock/drive disk concentric with the reel axle and mounted in a freely rotatable fashion in relation to it while serving the meshing of the locking pawl with the ratchet wheel through a control cam, and with a rotary inertial mass for actuating the locking pawl at excessive belt acceleration.

Abstract: Belt wind-up roller for vehicle safety belts having a wind-up roller in a housing in which the locking part at the belt wind-up roller and the counter-locking part at the housing are arranged in such manner that the blocking is effected at the belt withdrawal side of the belt wind-up roller, in an angular zone of approximately 120.degree., beginning approximately 10.degree. from before the roll-off point of the belt in the roll-off direction, to remove the load of the force-transfer between the axis of the belt wind-up roller and the housing.

Abstract: A device for tightening a safety belt about a person in a seat mounted on a vehicle body of a motor vehicle in which a belt anchor is attached to the vehicle. The belt anchor is supported movably relative to the vehicle body, and the belt anchor is coupled to a mass of a vehicle part which is arranged movably so as to execute a forced motion relative to the vehicle body if the vehicle hits an obstacle. The seat has a tiltably supported seat back frame which constitutes at least part of the mass, and wherein the belt anchor is linked-on to the lower part of the tiltably supported seat back frame. The mass is spring-loaded against motion relative to the vehicle body.