Buckle for a safety belt

Claim 1

A BUCKLE FOR A BELT, SAID BUCKLE COMPRISING A BASE MEMBER; FIRST AND SECOND LEVEL MEMBERS; A CATCH MEMBER CARRIED BY SAID FIRST LEVER MEMBER MEANS PIVOTABLY MOUNTING SAID FIRST LEVER MEMBER ON AND ABOVE SAID BASE MEMBER ABOUT A FIRST PIVOT AXIS FOR MOVEMENT OF SAID CATCH MEMBER TOWARDS AND AWAY FROM SAID BASE MEMBER, SAID CATCH MEMBER WHEN MOVED TOWARDS SAID BASE MEMBER BEING ADAPTED TO ENGAGE A CATCH ENGAGEABLE PART OF A TONGUE OF A BELT WHEN THE TONGUE IS INSERTED BETWEEN SAID BASE MEMBER AND SAID FIRST LEVER MEMBER AND TO DISENGAGE FROM THE CATCH ENGAGEABLE PART MOVED AWAY FROM SAID BASE MEMBER; MEANS PIVOTABLY MOUNTING SAID SECOND LEVER MEMBER ON THE SIDE OF SAID FIRST LEVER MEMBER REMOTE FROM SAID BASE MEMBER ABOUT A SECOND PIVOT AXIS PARALLEL TO SAID FIRST PIVOT AXIS, PARTS OF SAID FIRST AND SECOND LEVER MEMBERS BEING COUPLED TOGETHER AT A POINT SPACED FROM BUT ON THE SAME SIDE OF BOTH OF SAID PIVOT AXES SO THAT MOVEMENT OF THE END OF SAID SECOND LEVER MEMBER ON THE OTHER SIDE OF SAID SECOND PIVOT AXIS TOWARDS SAID FIRST LEVER MEMBER LIFTS THE PART OF SAID FIRST LEVER MEMBER CARRYING SAID CATCH MEMBER; SPRING MEANS BIASING SAID ONE END OF SAID SECOND LEVER MEMBER AWAY FROM SAID BASE MEMBER AND BIASING SAID PART OF SAID FIRST LEVER MEMBER TOWARDS SAID BASE MEMBER; A CAP MEMBER HAVING AN OPENING THEREIN; AND MEANS FOR SECURING SAID CAP MEMBER FIXED IN POSITION ON SAID BASE MEMBER WITH SAID CAP MEMBER POSITIONED OVER SAID FIRST AND SECOND LEVER MEMBERS BUT WITH SAID ONE END OF SAID SECOND LEVER MEMBER BEING ACCESSIBLE THROUGH THE OPENING IN SAID CAP MEMBER.