Self-adjusting beds

Claim 1

A BED WHEREIN THE SURFACE AREA IS TRANSVERSELY DIVIDED INTO A LOWER MAIN PART AND A BACK SECTION WHICH ARE CONNECTED BY HINGES, AND WHERE THE BACK CAN BE MOVED UP OR DOWN BY TRANSMISSION OF PRESSURE FROM THE SEAT TO THE BACK AND VICE VERSA WITHOUT THE USER HAVING TO RISE FROM THE BED, AND WHEREBY THE BACK TILTS ON CURVED BLOCKS WHICH SLANT FORWARDS AND ARE SITUATED AT A CERTAIN DISTANCE FROM THE HINGES BELOW THE SIDE BARS OF THE BACK FRAME AND ARE FIRMLY JOINED TO THE SIDE RAILS OF THE BASE FRAME AND-IN ORDER TO PREVENT THE BACK FROM SLIDING ON THE CURVED BLOCKS-A U-SHAPED METAL BRACKET OF APPROPRIATE WIDTH IS ATTACHED ON EACH SIDE, ONE ARM OF WHICH IS MOVABLY CONNECTED TO THE UPPER END OF THE CURVED BLOCK, SQUARE TO THE DIRECTION OF MOVEMENT, ITS OTHER ARM BEING MOVABLY ATTACHED TO THE BOTTOM SURFACE OF THE BACK FRAME, THUS ENSURING THAT THE SIDE BARS OF THE BACK FRAME AND THE CURVED BLOCKS ALWAYS MAKE CONTACT AT THE SAME POINTS, WHEREBY AT ANY INCLINATION OF THE BACK THERE EXISTS SUCH A STATE OF BALANCE AS TO REQUIRE THE SAME AMOUNT OF ADDITIONAL PRESSURE BY THE USER TO MOVE THE BACK UPWARDS AND DOWNWARDS.