Bed or chair with supporting surfaces having angular positions variable in relation to each other

Claim 1

AN ARTICLE OF FURNITURE HAVING A SEATING SURFACE AND A PLURALITY OF SUPPORTING SURFACES HAVING VARIABLE ANGULAR POSITIONS WITH RESPECT TO ONE ANOTHER AND WITH RESPECT TO SAID SEATING SURFACE TO EXPOSE VARYING LENGTHS OF THE SEATING SURFACE DEPENDENT UPON THE ANGULAR POSITION OF THE SUPPORTING SURFACES, SAID SEATING SURFCE INCLUDING PARALLEL SPACED LONGITUDINALLY EXTENDING ELEMENTS, SAID SUPPORTING SURFACES RESPECTIVELY INCLUDING PARALLEL SPACED ELEMENTS INTERLEAVED BETWEEN THE ELEMENTS OF THE SEATING SURFACE AT OPPOSITE ENDS THEREOF, A BASE, A FRAME SUPPORTED FROM SAID BASE, A SECOND AND THIRD FRAME, RESPECTIVELY PIVOTALLY SUPPORTED FROM AND THIRD FRAME, RESPECTIVELY PIVOTALLY PORTING FOR PIVOTAL MOVEMENT THE SPACED ELEMENTS OF THE SUPPORTING SURFACES, AND MEANS ADJUSTABLY SUPPORTED FROM SAID BASE AND IN TURN SUPPORTING THE ELEMENTS OF FOR SUPPORTING SURFACES FOR LONGITUDINALLY VARYING THE LOCATION OF THE SUPPORT OF SAID ELEMENTS OF THE SUPPORTING SURFACES FOR THEREBY VARYING THE EXPOSED LONGITUDINAL EXTENT OF THE ELEMENTS OF THE SEATING SURFACE BETWEEN THE ELEMENTS OF THE RESPECTIVE SUPPORTING SURFACES.