Buckles for safety belts and the like

Claim 1

A BUCKLE FOR SAFETY BELTS ADAPTED TO BE ATTACHED TO AN END OF A SAFETY BELT SECTION COMPRISING, A BODY MEMBER, A LATCHING PLATE ROCKABLY SECURED TO THE BODY MEMBER, SAID LATCHING PLATE HAVING A DOWNWARDLY-BULGED CENTRAL PORTION AND PROVIDED WITH AN ELONGATED SLOT AT ONE EDGE OF SAID CENTRAL PORTION, THE SLOT DEFINING A LIP ALONG ONE EDGE DISPOSED OUT OF THE PLANE OF THE BODY OF THE LATCHING PLATE, SPRING MEANS SECURED WITHIN THE BODY MEMBER AND OPERATIVE ON THE LATCHING PLATE TO CAUSE SAID LATCHING PLATE TO BE RESILIENTLY HELD AGAINST THE BODY MEMBER, A CONNECTION PLATE ATTACHED TO AN END OF ANOTHER SAFETY BELT SECTION, SAID CONNECTION PLATE HAVING A SLOT OPENING INTO WHICH THE LIP ENTERS UNDER THE BIAS OF THE SPRING WHEN THE CONNECTION PLATE IS SLID INTO THE BODY FOR POSITIONING BETWEEN SAID LIP AND BODY MEMBER, SAID SLOT OPENING IN THE CONNECTION PLATE HAVING AN EDGE ENGAGEABLE WITH SAID ENGAGING LIP TO OPPOSE WITHDRAWAL OF THE CONNECTION PLATE FROM THE BODY, AND A COVER MEMBER HAVING A LIMITED RAISING MOVEMENT WITH RESPECT TO THE BODY MEMBER AND CONNECTED TO THE BODY MEMBER, COMPLEMENTARY ENGAGING MEANS BETWEEN THE COVER MEMBER AND THE LATCHING PLATE SO THAT THE LATCHING PLATE WILL BE DISENGAGED FROM THE CONNECTION PLATE WHEN THE COVER MEMBER IS MANUALLY RAISED, SAID ENGAGING LIP HAVING A CURVED EDGE AND SAID SLOT OPENING EDGE IN THE CONNECTION PLATE BEING CORRESPONDINGLY CURVED FOR SWIVELLABLE ENGAGEMENT THEREBETWEEN.