Invalid s chair

Claim 1

AN INVALID''S CHAIR INCLUDING A WHEELED CHASSIS, A TURNTABLE MOUNTED FOR ROTATION ON SAID WHEELED CHASSIS, A CHAIR COMPRISING A SEAT AND A BACK, A HYDRAULIC JACK BETWEEN THE BACK AND THE TURNTABLE, SAID HYDRAULIC JACK INCLUDING A CYLINDER FIXEDLY SECURED AT ITS LOWER END TO THE TURNTABLE, A PISTON IN SAID CYLINDER, A PUMP FOR PUMPING FLUID WITHIN THE CYLINDER TO RAISE THE PISTON, A PISTON ROD SECURED TO THE PISTON, MEANS BETWEEN THE PISTON ROD AND THE CHAIR BACK TO PERMIT LIMITED SIDEWISE TIPPING OF THE CHAIR, SAID CHAIR BACK BEING PROVIDED WITH SPACED APART FRONT AND REAR PANELS AND NARROW SIDE PANELS JOINING THE FRONT AND REAR PANELS AND TERMINATING SHORT OF THE LOWER END OF THE CYLINDER, STABILIZING MECHANISM BETWEEN THE CHAIR SEAT AND THE TURNTABLE TO RESIST SAID TIPPING OF THE CHAIR, AND MEANS CONVENIENTLY LOCATED WITH RESPECT TO A PERSON SEATED IN THE CHAIR FOR CONTROLLING THE UP AND DOWN MOVEMENT OF THE PISTON AND THE CHAIR.