Invalid's bed

Claim 1

AN INVALID''S BED, COMPRISING: A BODY-SUPPORTING MEMBER HAVING A BACK PORTION, A BUTTOCK PORTION AND A LEG PORTION, SAID PORTIONS HAVING THEIR ADJOINED ENDS PIVOTALLY INTERCONNECTED SO AS TO BE MOVABLE BETWEEN A HORIZONTALLY ALIGNED NORMAL POSITION WHEREIN AN INVALID MAY BE SUPPORTED IN A SUPINE CONDITION AND AN ALTERNATE ANGULARLY DISPLACED CHAIR-DEFINING POSITION WHEREIN SAID INVALID IS ADAPTED TO BE SUPPORTED IN A SEATED CONDITION; A PAIR OF TRANSVERSELY ALIGNED UPRIGHT COLUMNS HAVING THEIR UPPER ENDS PIVOTALLY ATTACHED TO THE INTERMEDIATE PORTION OF SAID BACK PORTIONS; A PAIR OF FORWARDLY AND DOWNWARDLY EXTENDING STRUTS; A CROSS-MEMBER EXTENDING TRANSVERSELY BETWEEN THE UPPER END OF SAID STRUTS; LEVER MEANS MOVABLY INTERCONNECTING SAID COLUMNS, SAID BUTTOCK AND BACK PORTIONS AND THE UPPER ENDS OF SAID STRUTS; SECOND LEVER MEANS MOVABLY INTERCONNECTING THE INTERMEDIATE PORTIONS OF SAID STRUTS AND SAID BODY-SUPPORTED MEMBER AT THE POINT OF PIVOTAL INTERCONNECTION OF SAID BUTTOCK AND LEG PORTIONS; THIRD LEVER MEANS MOVABLY INTERCONNECTING THE INTERMEDIATE PORTION OF SAID STRUTS WITH THE INTERMEDIATE PORTION OF SAID LEG PORTION; A PUSHER MEMBER PIVOTALLY CONNECTED TO SAID BODY-SUPPORTING MEMBER AT THE POINT OF PIVOTAL INTERCONNECTION OF THE LEG AND BUTTOCK PORTIONS THEREOF, SAID PUSHER MEMBER EXTENDING DOWNWARDLY AND REARWARDLY; AND DRIVE MEANS CARRIED BY SAID CROSS-MEMBER SO AS TO RECEIVE SAID PUSHER MEMBER WHEREBY ACTUATION OF SAID DRIVE MEANS WILL EFFECT BODILY MOVEMENT OF SAID PUSHER MEMBER AWAY FROM SAID DRIVE MEANS SO AS TO EFFECT CONCURRENT MOVEMENT OF SAID BODY-SUPPORTING MEMBER FROM SAID HORIZONTALLY ALIGNED POSITION TO SAID ALTERNATE ANGULARLY DISPLACED POSITION.