Collapsible stools and chairs

Claim 1

A COLLAPSIBLE SELF-LOCKING CHAIR COMPRISING PAIRS OF CROSSED BRACE LEGS PIVOTED TO ONE ANOTHER INTERMEDIATE THE LENGTH THEREOF, UPPER BLOCKS PIVOTALLY RECEIVING THE UPPER ENDS OF ADJACENT FOUR PAIRS OF CROSSED LEGS ARRANGED NINETY DEGREES APART FROM ONE ANOTHER AND RESPECTIVELY ALONG THE FRONT, REAR AND SIDES OF THE CHAIR, A SEAT PORTION HAVING STRAPS RUNNING TO THE CORNERS OF THE SEAT PORTION AT AN ANGLE TO ONE ANOTHER AND MEANS FOR RESPECTIVELY JOINING SAID SEAT STRAPS TO THE BLOCK AT A CORRESPONDING ANGLE WITH THE RESPECTIVE PAIRS OF CROSS LEGS, THE EXTREMITIES OF THE STRAPS BEING SPACED SUCH A DISTANCE APART AS TO ALLOW OUTWARD OVERCENTERING DOWNWARD FORCE UPON THE BLOCKS TENDING THEREBY TO SPREAD THE CROSSED LEGS AND SEAT PORTION TO ITS OPEN POSITION WHEN THE SEAT PORTION IS WEIGHTED, WHEREBY THE SEAT PORTION PROPER WILL BE RELIEVED FROM THE SEAT STRAIN AND THE STRAPS WILL APPLY OVER CENTER DOWNWARD FORCE UPON THE BLOCKS WHEN THE CHAIR IS OPENED, EACH OF SAID UPPER BLOCKS HAVING BIFURCATED PORTIONS ANGLED NINETY DEGREES FROM ONE ANOTHER, SAID CROSSED LEGS HAVING TONGUE PORTIONS EXTENDING INTO THE BIFURCATED PORTIONS OF THE BLOCKS AND PIVOT PINS EXTENDING THROUGH THE BIFURCATED