Abstract: The vehicle-sensitive inertia mass of a control mechanism for a pretensioner in a safety belt restraining system is secured in a safety position by a blocking means engaging on the inertia mass to inhibit operation of said pretensioner. A sensing pin senses the approach of the housing of the control mechanism to a part of the vehicle bodywork in the mounting of the housing on said part of the vehicle bodywork and converts said approach to an actuating travel which causes the blocking means to release the inertia mass.

Abstract: For controlling a pretensioner of a gas-bag restraining system in vehicles a vehicle-sensitive inertia mass is pivotally mounted in a housing. A strike piece pivotally mounted in the housing and spring-loaded in the direction of a firing pin bears via a roller mounted easily movably thereon on a cam face of the inertia mass. The configuration of the cam face, the path of movement of the roller on a pivot movement of the spring-loaded strike piece and the direction of movement of the inertia mass are adapted to each other in such a manner that the triggering criteria of an electronic trigger circuit integrating the deceleration values above a predetermined threshold with respect to time are simulated. By employing rolling bearings and by the hermetic sealing of the housing the triggering parameters remain unchanged for a long time.

Abstract: The mechanical sensor of a pretensioner in a safety belt restraining system is secured against unintentional release in the unassembled state by a pin which engages a vehicle-sensitive inertia mass and which blocks movement of the inertia mass. The pin is connected via a cable to a rotatable member which is received in a bearing housing. The rotatable member has the form of an annular disc with a central bore through which a mounting screw can be inserted. On tightening the mounting screw the rotatable member is also turned so that via the pulling cable the pin is withdrawn and the securing of the inertia mass is cancelled.

Abstract: The buckle for safety belts in vehicles provided with a pretensioner engaging said buckle is provided with a compensating mass which at the end of the pretensioning travel prevents a mass-inertia-induced movement of the release button in the actuating direction. The compensating mass is formed by a lever which is pivotally mounted on the housing and which comprises a gear element which is in permanent meshing engagement with a rack on the release button. On each actuation of the release button the lever is pivoted, the easy mobility thereof thereby being ensured even after a longer period of use of the buckle.

Abstract: The firing mechanism for a pyrotechnical gas generator in the tightening means of a safety belt restraining system includes a pivotally mounted vehicle-sensitive inertia mass, a spring-loaded pivotally mounted strike piece, a firing pin which is arranged with its free end lying opposite the impact fuse of the gas generator and with its other end lying opposite the strike piece, and a roller blocking mechanism which in the readiness state holds the strike piece at a distance from the opposite end of the firing pin and on vehicle-sensitive pivoting of the inertia mass after over-coming an inhibition threshold releases the strike piece which then under the action of the spring biasing is driven to the oppositely disposed end of the firing pin, strikes the latter and via the firing pin effects firing of the gas generator.

Abstract: The tightening means for safety belt restraining systems is equipped with a pyrotechnical piston/cylinder tightening drive which is inserted via fitting parts engaging the piston on the one hand and the cylinder on the other hand into the force flow path of the safety belt system. The cylinder is formed in a cylinder block which is guided displaceably parallel to the axis of the cylinder on a bodywork-fixed or vehicle-seat-fixed guide member. The piston is formed at the one end of a shear-stressable piston rod and in the readiness position of the tightening means is inserted with the piston rod into the cylinder. At its other end the piston rod is supported at the guide part. The release is by means of a vehicle-sensitive mechanical trigger mechanism. Instead of a return blocking mechanism is return brake is provided which reduces the stress peaks in the belt system.

Abstract: A buckle for a safety belt system provided with a belt pretensioner is secured by a blocking pawl against unintentional opening at the end of the pretensioning stroke. By the locking pawl the release button is arrested at the housing before it has reached the end of its lost motion path. The driving of the locking pawl is by the inertia forces acting with a certain leverage at the center of gravity thereof at the end of the pretensioning stroke.

Abstract: A safety belt retractor includes a webbing sensitive blocking mechanism for blocking rotation of the belt spool in the belt withdrawal direction. The blocking mechanism includes an inertia disc connected via a coupling pawl and an externally toothed coupling wheel to the control wheel. Relative rotation between the inertia disc and the control wheel results in actuation of the blocking mechanism. When a predetermined centrifugal force is exceeded the coupling pawl comes out of engagement with the external toothing of the coupling wheel. The mass disc is uncoupled from the control wheel, preventing actuation of the blocking mechanism.

Abstract: In a cylinder a rod is received which at its one end projects out of the cylinder and at its other end defines a free space in which a plurality of roller elements are accommodated. The outer diameter of the annular arrangement formed by the roller elements is greater than the inner diameter of the cylinder bore. Under a high tensile load between the cylinder and rod the roller elements penetrate into the material of the cylinder wall and with formation of longitudinal grooves deformation work is performed by which a high energy amount is converted and load peaks eliminated from the belt system.

Abstract: A belt lock for a safety belt system provided with a tightening means operative between the belt lock and an anchoring point on the vehicle body is provided with a copensation mass which is deflected by a two-armed lever and compensates the inertial forces of the release button and the parts connected thereto.

Abstract: A retraction element in the form of a pivotally mounted lever or of a linearly slidable slider is mounted on a base plate to be preferably attached to the vehicle seat. The lever or slider is loaded by a strong flat spiral spring, but is held in a stable rest position by a latching device. The latching device consists of two roller body systems functionally connected in series. The first roller body system consists of two outer rolls and an inner, loose roll bearing on one roll of the second system. The second system consists of two outer rolls and an inner roll being situated in an over-dead-center position and mounted on one arm of a double-armed lever whose other arm carries a vehicle sensitive inertial mass. A release threshold may be defined precisely and reproducibly by means of this latching device.

Abstract: A retractor shaft is rotatably mounted in a loadbearing housing. A webbing clamping means consists of a clamping member mounted movably on the housing and a housing-fixed clamping face disposed opposite to and spaced from said member. The actuation of the clamping member is via an actuating nose on a ring which is provided with an internal toothing and which is rotatably mounted on a side plate of the housing. On one side of the retractor shaft two pawls are eccentrically and pivotally mounted in their center of gravity in such a manner that the engagement faces lie opposite the internal toothing of the ring. The pawls are driven by mass inertia forces against the force of a return spring into coupling engagement with the internal toothing of the ring. The longitudinal component of the arcuate movement of the actuating nose is transmitted directly via a pin and a slot to the clamping member.

Abstract: The force-limiting energy absorber for safety belt systems comprises a series of stretch members lying one behind the other in the direction of the tensile stress. Each stretch member comprises an opening which is surrounded by a border deformable under a tension load. In the openings limiting elements are disposed which limit in abutment manner the deformation of the border transversely of the direction of the tensile stress. The limiting elements may be made mushroom-shaped and integrally formed on the border of the stretch members.

Abstract: Two coupling pawls are mounted eccentrically and pivotably in their center of gravity on a drive pulley of the tightening rotary drive. A coupling ring is non-rotatably connected to the belt coiling shaft of the belt retractor. The coupling ring comprises an internal toothing into which the coupling pawls are driven solely by the action of inertia forces to establish a coupling connection. The coupling pawls are offset in the peripheral direction with respect to each other by an angle which corresponds to an odd multiple of half the pitch of the internal toothing of the coupling ring.

Abstract: The drive device of lightweight construction for restraining systems in motor vehicles, in particular safety-belt tightening means, comprises a pyrotechnical gas generator, the gases of which act on a working chamber. The working chamber comprises an outwardly leading relief path which is sealed by a closure element of a material which at a temperature which lies above the operating temperature range of the gas generator but which at the most is equal to the self-igniting temperature of the gas generator softens at least to such an extent that the closure element on ignition of the gas generator frees the relief path but which at temperatures beneath the operating temperature range of the gas generator has a mechanical strength such that the relief path remains sealed by the closure element under the gas action.

Abstract: A height adjustment device is provided which is suitable for combination with a webbing tightener. Unintentional release of the locking engagement by the downwardly directed inertia forces on the slide are avoided in that by means of a compensating mass a compensation force is generated which simultaneously acts on the slide and opposes the inertia forces of the latter. A two-armed lever which is pivotally mounted in its center and to the one end of which the compensating mass is secured converts the downwardly directed inertia forces originating from the compensating mass to an upwardly directed compensation force acting on the slide.

Abstract: The belt retractor is provided with a vehicle-sensitive and webbing-sensitive locking mechanism. At the two side faces of the belt coiling shaft in each case two locking pawls are pivotably mounted eccentrically thereto. They are each biased by a return spring into their rest position out of engagement with the teeth of a housing-fixed ratchet toothing member. The locking pawls are each mounted in their center of gravity. The webbing-sensitive locking takes place solely under the action of inertia forces.

Abstract: A fastener mechanism for the chin strap of a helmet. An insertion lock is secured to the helmet shell and has a receiving channel for receiving the fastener part of the chin strap. The fastener part is longitudinally displaceably provided in the receiving channel, with arresting teeth being disposed one after the other in the longitudinal direction on at least one narrow side of the fastener part. An arresting member is disposed in the insertion lock on one side of the receiving channel thereof and cooperates with the teeth of the fastener part. The arresting member is disposed essentially alongside the fastener part at least nearly in a plane therewith. A spring exerts force on the arresting member in a direction toward the fastener part, with the arresting member assuming an engagement position with the fastener part that prevents the latter from being pulled out of the insertion lock. A handle is provided for shifting the arresting member into a disengaged position whereby the fastener part is released.

Abstract: The force-limiting energy absorber for safety belt systems comprises a series of stretch members lying one behind the other in the direction of the tensile stress. Each stretch member comprises an opening which is surrounded by a border deformable under a tension load. In the openings limiting elements are disposed which limit in abutment manner the deformation of the border transversely of the direction of the tensile stress. The limiting elements may be made mushroom-shaped and integrally formed on the border of the stretch members.

Abstract: In the safety belt restraining system a tightening means is combined with a height adjuster for the upper deflection fitting of the shoulder belt. By offsetting of the pivot axis of the detent lever of the height adjuster in the forward direction with respect to the engagement point of the deflection fitting, on activation of the tightening means a turning moment is generated at the detent lever by which said lever is pivoted into engagement with the next available detent opening of the height adjuster.