Adjustable height bed

Claim 1

MEANS FOR ADJUSTING THE HEIGHT OF A BED, COMPRISING A BED FRAME HAVING A PAIR OF HOLLOW FOOT LEGS AND A PAIR OF HOLLOW HEAD LEGS, A PAIR OF PARALLEL CHANNEL SHAPED SIDE PANELS JOINING THE FOOT AND HEAD LEGS AT EACH SIDE AND SUITABLE TRANSVERSE BRACES, SAID HOLLOW LEGS HAVING VERTICAL SLOTS IN THE OPPOSED FACES AT EACH SIDE FOR A SUBSTANTIAL DISTANCE FROM ABOVE THE TOP OF SAID SIDE PANELS DOWNWARDLY, LEG MEMBERS TELESCOPICALLY RECEIVED WITHIN SAID HOLLOW LEGS FOR SLIDABLE MOVEMENT THEREIN, BELL CRANK MEMBERS EACH HAVING ONE ARM PIVOTALLY MOUNTED ON SAID SIDE PANELS ADJACENT ONE OF THE HOLLOW LEGS WITH THE OTHER ARM PASSING THROUGH THE HOLLOW LEG SLOTS AND ENGAGING THE INNER TOP ENDS OF SAID TELESCOPING LEG MEMBERS, LINKAGE MEANS CONNECTING EACH OF SAID BELL CRANKS FOR PIVOTAL MOVEMENT AND MEANS FOR SIMULTANEOUSLY AND EQUALLY PIVOTING SAID BELL CRANKS THROUGH SAID LINKAGE TO MOVE THE LEG MEMBERS WITHIN SAID HOLLOW LEGS.