This paper describes stages in the development of the inertia-reel seat belt. Each design stage is examined, its merits are discussed and reasons given for any modifications incorporated in an improved model. Most of the initial drawbacks were due to the lack of adjustment and the need for the belt to be constantly reeled in. The author discusses the locking systems of the latest models which provide some restraint during normal driving and are usually designed to lock under brake applications of greater than 0.4g. Modern inertia-reel seat belts still have significant disadvantages which can be corrected or eliminated by future research. The paper concludes with a discussion among delegates who were concerned about the non-uniformity of release mechanisms of seat belt fastenings. This article was originally published in the "Ingenieurs de l'Automobile", April 1974. /TRRL/

  • Corporate Authors:

    Motor Industry Research Association

    Watling Street
    Nuneaton CV10 0TU, Warwickshire,   England 
  • Publication Date: 1975

Media Info

  • Features: Figures;
  • Pagination: 11 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00138915
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: MIRA Transl 11/75
  • Files: ITRD, TRIS
  • Created Date: Oct 26 1976 12:00AM