Rotatable beds for invalids

Claim 1

A ROTATABLE BED FOR INVALIDS, COMPRISING A STATIONARY BED FRAME HAVING A HEAD PART AND A FOOT PART, A ROTATABLE FRAME JOURNALED IN SAID STATIONARY BED FRAME FOR AT LEAST 180* ROTATIONAL MOVEMENT ABOUT AN AXIS, DISPOSED LONGITUDINALLY RELATIVE TO SAID BED FRAME, TWO MATTRESSES SECURED TO SAID ROTATABLE FRAME, EACH OF SAID MATTRESSES CONSISTING OF TWO SUBTANTIALLY EQUAL HALVES TO FORM JOINTLY A COIMPLETE MATTRESS, SAID ROTATABLE FRAME INCLUDING TWO RODS DISPOSED LATERALLY AND LONGITUDINALLY ABOVE EACH SIDE OF SAID BED FRAME, ONE HALF OF EACH OF SAID MATTRESSES BEING PIVOTALLY MOUNTED ON ONE OF SAID RODS, WHEREBY EACH OF SAID MATTRESSES IS CAPABLE OF ASSUMING THE POSITIONS AS A LOWER MATTRESS AND AS AN UPPER MATTRESS, RESPECTIVELY, SO THAT THE INVALID MAY BE PUT TO BED IN A PRONE POSITION BETWEEN SAID LOWER AND SAID UPPER MATTRESSES AND BE TURNED UPSIDE DOWN UPON ROTATING SAID ROTATABLE FRAME FOR AN ANGLE OF 180* JOINTLY WITH SAID TWO MATTRESSES, WHEREUPON THE HALVES OF THE UPPER OF SAID MATTRESSES MAY BE TURNED DOWN TO ASSUME AN INOPERATIVE POSITION.