Document ID: chunk:federal_register_of_legislation:F2007C00099:body:0:p12
Version: federal_register_of_legislation:F2007C00099
Segment Type: other
Provision Reference: 
Character Range: 34344–37531

devices to sense acceleration are accelerated at not more than 5 m/s2, the peak acceleration being attained in not less than 40 milliseconds.
9.4.2.                              Furthermore with a point on the external 'Strap' fixed the locking device must limit 'Strap' movement, measured from the time of application of the acceleration, to not more than:
9.4.2.1.                        30 mm, when the 'Strap' is withdrawn to a point which is 150 ± 5 mm from the fully extended position; and
9.4.2.2.                        80 mm, when the 'Strap' is withdrawn to points 450 ± 5 mm and 760 ± 5 mm from the fully extended position, if the 'Seatbelt Assembly' includes sufficient 'Strap' to attain these extensions.
9.4.3.                              This requirement must be met under positive and negative acceleration in longitudinal, transverse and vertical directions, except that in cases where the device is designed to lock when tilted to any angle in excess of 45° then the locking requirement need be met for longitudinal and transverse directions only.
9.4.4.                              Sensing of acceleration to meet the requirements of this clause must not be dependent upon rate of withdrawal of 'Strap' from the retractor.  In demonstrating this requirement, any device dependent for sensing of acceleration on withdrawal of 'Strap' from the retractor may be rendered inoperative.
9.4.5.                              'Emergency Locking Retractors' must be designed in such a way that when the 'Strap' is extended at an acceleration of not more than 20 m/s2 locking occurs within 25 mm of 'Strap' extension.  This requirement must be met at an extrapolated point representing full extension based on test results achieved at points of extension which are less than the full extensions by 150 ± 5 mm, 450 ± 5 mm, and 750 ± 5 mm (if available), respectively.
9.4.6.                              An 'Emergency Locking Retractor' must be designed to lock automatically, or meet the requirements of clauses 9.4.1 and 9.4.5 upon any single mechanical failure of a spring which is part of the locking mechanism.
9.4.7.                              In cases where the operation of a retractor depends on an external signal or power source, the design must ensure that the retractor locks automatically upon failure or interruption of that signal or power source.
9.4.8.                              The design of an 'Emergency Locking Retractor' must ensure that it remains unlocked when the vehicle is tilted up to 12°, longitudinally or transversely, from the horizontal.
10.                                      DYNAMIC TEST REQUIREMENTS
10.1.                                'Seatbelt Assemblies' for front facing 'Seats' must not separate within themselves or from any 'Anchorage', when tested in accordance with the dynamic test procedure of clause 12.
10.2.                                Prior to the dynamic test, each 'Seatbelt Assembly' must be subjected to the preconditioning requirements of clause 10.3.
10.3.                                Dynamic Test Preconditioning
10.3.1.                          Any 'Buckle Component' or manual adjusting device which can