Retractable safety belts

Claim 1

A RETRACTABLE SEAT BELT COMPRISING A FASTENER COUPLE HAVING A FIRST FASTENER PART FREE TO MOVE ACROSS THE BODY OF A USER AND RELEASABLY ENGAGEABLE WITH A MATING SECOND FASTENER PART TO PLACE SAID BELT IN USER-RESTRAINING POSITION, SAID FIRST FASTENER PART HAVING A CASING WITH A FRONT END FOR ENGAGING SAID SECOND FASTENER PART, A REAR END, AND SIDES EXTENDING LONGITUDINALLY BETWEEN SAID ENDS, A SPRINGWOUND RETRACTION REEL SUPPORTED UPON SAID CASING FOR ROTATION ABOUT AN AXIS TRANSVERSE TO THE SIDES OF SAID CASING, AND A STRAP HAVING A FIRST PORTION ADAPTED TO BE ANCHORED AND A SECOND PORTION SECURED TO SAID REEL FOR EXTENSION AND RETRACTION WITH RESPECT TO SAID CASING WHEN SAID FIRST FASTENER PART IS MOVED ALONG THE STRAP AWAY FROM AND TOWARD SAID FIRST PORTION, RESPECTIVELY, MEANS FOR PREVENTING FURTHER EXTENSION OF SAID STRAP FROM SAID CASING WHEN SAID STRAP HAS BEEN EXTENDED TO ANY SELECTED LENGTH WITHIN A WIDE RANGE OF LENGTHS AND PLCED IN USER-RESTRAINING POSITION, SAID EXTENSION-PREVENTING MEANS COMPRISING A PAIR OF ABUTMENTS SUPPORTED UPON SAID CASING TRANSVERSELY OF THE SIDES, ONE OF SAID ABUTMENTS BEING A PIN SUPPORTED FORWARDLY OF THE OTHER ABUTMENT FOR TRANSLATIONAL MOVEMENT WITH RESPECT TO SAID CASING TOWARD AND AWAY FROM THE OTHER ABUTMENT, SAID STRAP PASSING FROM SAID FIRST PORTION INTO SAID CASING, REVERSELY AROUND SAID PIN FROM THE FRONT THEREOF, BETWEEN SAID PIN AND THE OTHER ABUTMENT TO SAID REEL FOR EXERTING A FORCE ON SAID PIN TO MOVE IT TOWARD THE OTHER ABUTMENT TO CLAMP SAID STRAP WHEN THE STRAP EXTERIORLY ADJACENT TO SAID CASING HAD A REARWARD ORIENTATION, MEANS FOR RELEASING THE CLAMPING OF SAID STRAP BY SAID PIN TO FACILITATE MOVEMENT OF SAID STRAP ABOUT SAID PIN DURING DESIRED EXTENSION AND RETRACTION OF SAID STRAP, AND SAID FASTENER COUPLE HAVING MEANS MOVABLE INDEPENDENTLY OF SAID EXTENSION-PREVENTING MEANS FOR RELEASING THE ENGAGEMENT OF SAID FASTENER PARTS AND PERMITTING SAID CASING TO MOVE ALONG SAID STRAP TOWARD SAID FIRST PORTION AND THEREBY TO RETRACT SAID STRAP.