Device for pivoted connection of two parts

Claim 1

A SUPPORTING HINGE STRUCTURE FOR CHAIRS OR THE LIKE, SAID HINGE STRUCTURE COMPRISING A FIXED BRACKET, MEANS ON SAID BRACKET FOR MOUNTING THE SAME ON A SUPPORT, A MOVABLE BRACKET PIVOTALLY MOUNTED ON SAID FIXED BRAKCET FOR MOVEMENT ABOUT A HORIZONTAL AXIS, MEANS ON SAID MOVABLE BRACKET FOR ATTACHING A BODY SUPPORTING PART OF A CHAIR, A FIRST ABUTMENT SURFACE ON SAID FIXED BRACKET DISPOSED ON ONE SIDE OF SAID AXIS, A SECOND ABUTMENT SURFACE ON SAID MOVABLE BRACKET OPPOSITE SAID FIRST SURFACE AND MOVABLE FROM A STARTING POSITION TOWARD SAID FIRST SURFACE UPON MOVEMENT OF SAID MOVABLE BRACKET ABOUT SAID AXIS, SPRING MEANS DISPOSED BETWEEN SAID SURFACES TO YIELDABLY RESIST MOVEMENT OF SAID SECOND SURFACE TOWARD SAID FIRST SURFACE, AND MEANS TO MOVE SAID SPRING MEANS TOWARD OR AWAY FROM SAID AXIS TO VARY THE LENGTH OF THE LEVER ACTING ON SAID SPRING MEANS, WHEREBY THE FORCE RESISTING PIVOTAL MOVEMENT OF SAID MOVABLE BRACKET MAY BE ADJUSTED.