Safety belt buckle

Claim 1

A SAFETY BELT BUCKLE COMPRISING A BODY MEMBER HAVING A PAIR OF SIDE WALLS, A BOTTOM WALL EXTENDING FROM ONE SIDE WALL TO THE OTHER SIDE WALL, SAID SIDE WALL EXTENDING UPWARDLY FROM THE OPPOSITE EDGES OF THE BOTTOM WALL, AND A TOP WALL EXTENDING FROM ONE SIDE WALL TO THE OTHER SIDE WALL, THE INNER SURFACE OF THE TOP WALL BEING AT AN ACUTE ANGLE TO THE INNER SURFACE OF THE BOTTOM WALL LENGTHWISE OF THE BODY TO PROVIDE A WEDGESHAPED OPENING BETWEEN THE TWO, A PLATE OF A WIDTH SUBSTANTIALLY THE DISTANCE BETWEEN SAID SIDE WALLS SLIDABLY ENGAGING THE INNER SURFACE OF THE TOP WALL TO MOVE TOWARD THE BOTTOM WALL AS IT MOVES LENGTHWISE OF THE BUCKLE IN ONE DIRECTION, A HANDLE PIVOTED IN SAID BODY ON AN AXIS EXTENDING TRANSVERSELY THEREOF, A LINK CONNECTING SAID HANDLE TO SAID PLATE BY A SLOT AND PIN CONNECTION FOR MOVING THE PLATE LENGTHWISE RELATIVE TO THE BODY IN ONE DIRECTION OR THE OTHER DIRECTION UPON SWINGING THE HANDLE ABOUT ITS PIVOT, SAID HANDLE WHEN MOVED IN ONE DIRECTION CAUSING ONE END OF THE SLOT TO ENGAGE THE PIN AND MOVE THE PLATE LENGTHWISE RELATIVE TO THE BODY AND TOWARD SAID BOTTOM WALL FOR GRIPPING A PART INSERTED INTO THE BODY BETWEEN THE PLAT AND BOTTOM WALL, SAID SLOT BEING OF SUFFICIENT EXTENT SO THAT THE PLATE MAY FURTHER MOVE LENGTHWISE OF THE BODY TOWARD THE BOTTOM WALL INTO GRIPPING POSITION WITH MOVEMENT OF THE INSERTED PART LENGTHWISE RELATIVE TO THE BODY AND SAID PIN MAY MOVE TOWARD THE OTHER END OF THE SLOT TO A POINT INTERMEDIATE THE ENDS OF THE SLOT WITHOUT PLACING STRAIN ON THE PIN.