Cone type safety belt buckle

Claim 1

A COUPLING FOR A BELT OR SAFETY HARNESS COMPRISING A FIRST AND SECOND PART RELEASABLY CONNECTABLE WITH ONE ANOTHER, AT LEAST ONE PART BEING ADAPTED TO BE CONNECTED WITH A STRAP OF A BELT OR HARNESS, SAID PARTS HAVING SURFACES WHICH OVERLAP WHEN THE COUPLING PARTS ARE CONNECTED, THE FIRST PART HAVING A PROJECTION UPSTANDING FROM THE SAID SURFACE THEREOF PROVIDED WITH A TRANSVERSE RECESS THEREIN, AND THE SECOND PART HAVING A HOLE THERETHROUGH TO RECEIVE SAID PROJECTION WHEN SAID PARTS ARE BORUGHT INTO OVERLAPPING RELATIONSHIP BY RELATIVE MOVEMENT OF THE PARTS IN THE DIRECTION OF INSERTION OF SAID PROJECTION THROUGH SAID HOLE, THE ARRANGEMENT BEING SUCH THAT WHEN IN USE SAID BELT OR HARNESS IS PLACED IN TENSION THE FORCE TENDING TO SEPARATE THE PARTS IN LARGELY TAKEN IN SHEAR BY SAID PROJECTION, SAID SECOND PART INCLUDING A SPRING BIASED LATCHING MEMBER ADAPTED TO MOVE IN A PLANE GENERALLY AT RIGHT ANGLES TO SAID DIRECTION OF INSERTION OF SAID PROJECTION THROUGH SAID HOLE TO ENGAGE IN THE RECESS IN SAID PROJECTION TO PREVENT REMOVAL OF THE PROJECTION FROM THE HOLE UNLESS THE LATCHING MEMBER IS DISPLACED AGAINST THE BIAS, THE ARRANGEMENT OF THE PROJECTION AND LATCHING MEMBER BEING SUCH THAT THE LATCHING MEMBER IS AUTOMATICALLY DISPLACED AGAINST THE BIAS BY THE PROJECTION AS IT ENGAGES THE HOLE AND MOVES BACK AGAINST THE BIAS TO THEN ENGAGE IN THE RECESS WHEN THE PROJECTION IS FULLY INSERTED, MANUALLY OPERABLE MOVABLE MEANS FOR DISPLACING THE LATCHING MEMBER TO RELEASE THE COUPLING, THE SURFACE OF THE PROJECTION WHICH IN USE TRANSMITS THE FORCE BETWEEN THE TWO PARTS BEING AT A PROTION THEREOF AT AN ANGLE TO THE AXIS OF THE PROJECTION SO THAT WHEN THE LATCHING MEMBER IS DISPLACED TO RELEASE THE COUPLING WHEN SAID COUPLING IS PLACED IN TENSION BY REASON OF THE CLOSED BELT, THE SAID FORCE ACTING BETWEEN THE PARTS TENDS TO MOVE THE PROJECTION OUT OF THE HOLE.