Sofa-bed hinge mechanism

Claim 1

IN A SOFA-BED AND THE LIKE ARTICLE OF FURNITURE HAVING A SUPPORTING FRAME AND A SEAT MEMBER AND A BACK MEMBER SUPPORTED BY SAID FRAME AND MOVABLE RELATIVELY THERETO AND TO EACH OTHER FROM RELATIVE ANGULAR SEATING POSITION TO RELATIVE HORIZONTALLY ALIGNED BED POSITION AND VICE VERSA, HINGE MEANS JOINING SAID SEAT MEMBER AND BACK MEMBER AT THEIR CONTIGUOUS EDGES AT OPPOSITE END THEREOF, AND MEANS FOR ADJUSTING SAID SEAT MEMBER AND BACK MEMBER FROM SEATING POSITION TO BED POSITION AND VICE VERSA DURING THEIR RELATIVE HINGING MOVEMENT AND FOR ULTIMATELY OPTIONALLY SUPPORTING SAID MEMBERS IN THEIR SEATING OR BED POSITION, SAID ADJUSTING MEANS COMPRISING GUIDEWAY MEANS CARRIED BY SAID SUPPORTING FRAME AND EXTENDING BETWEEN POINTS ADJACENT TO THE FRONT AND REAR THEREOF, GUIDE FOLLOWER MEANS CARRIED BY SAID SEAT MEMBER AND COOPERATING WITH SAID GUIDEWAY MEANS, A FIRST LEVER OF THE FIRST ORDER HAVING THE FULCRAL POINT INTERMEDIATE ITS ENDS PROVIDED WITH A FIXED PIVOT ON AND ADJACENT TO ONE END OF SAID SUPPORTING FRAME AND PIVOTALLY CONNECTED ADJACENT TO ONE OF ITS ENDS WITH SAID SEAT MEMBER, A SECOND LEVER OF THE FIRST ORDER HAVING THE FULCRAL POINT INTERMEDIATE ITS ENDS PROVIDED WITH A FIXED PIVOT ON AND ADJACENT TO THE OPPOSITE END OF SAID SUPPORTING FRAME AND PIVOTALLY CONNECTED ADJACENT TO ONE OF ITS ENDS WITH SAID BACK MEMBER, AND A LINK PIVOTALLY CONNECTING THE RESPECTIVE OPPOSITE ENDS OF SAID LEVERS, WHEREBY WHEN SAID SEAT MEMBER IS SHIFTED LONGITUDINALLY OF AND GUIDED BY SAID GUIDEWAYS MEANS SAID LEVERS, WHEREBY WHEN SAID BACK MEMBER TO RESPOND TO SUCH MOVEMENT AND BE AUTOMATICALLY ADJUSTED FROM ITS SEATING POSITION TO ITS BED POSITION, AND IN SUBSTANTIAL PARALLELISM WITH SAID SEAT SAID SEAT MEMBER ADJACENT TO ITS EDGE REMOTE FROM SAID HINGE MEANS, AND MEANS FOR POSITIONING SAID LEG MEANS SUBSTANTIALLY NORMAL TO SAID SEAT MEMBER AND IN GROUNDCONTACTING ARRANGEMENT WHEN SAID SEAT MEMBER AND IN GROUNDPOSITION, AND IN SUBSTANTIAL PARALLELISM WITH SAID SEAT MEMBER WHEN IT IS IN SEATING POSITION, SAID POSITIONING ADJUSTING MEANS FOR SAID SEATING AND BACK MEMBERS AND BEING ADJUSTING MEANS FOR SAID SEAT AND BACK MEMBERS AND BEING OPERATIVE AUTOMATICALLY UPON ADJUSTMENT OF SAID MEMBERS FROM SEATING POSITION TO BED POSITION AND VICE VERSA, SAID POSITIONING MEANS INCLUDING AN EXTENSION OF SAID FIRST LEVER OUTWARDLY OF AND FOR ARCUATE MOVEMENT ABOUT THE PIVOTAL CONNECTION OF SAID FIRST LEVER WITH SAID SEAT MEMBER, A LINK HAVING CONNECTIONS WITH SAID EXTENSION AND LEG MEANS RESPECTIVELY, MEANS PROVIDING FOR MOVEMENT OF THE CONNECTION OF SAID LINK WITH SAID LEG MEANS LONGITUDINALLY OF SAID LEG MEANS, AND A GUIDEWAY CARRIED BY SAID SEAT MEANS IN FIXED RELATION TO THE PIVOTAL CONNECTION OF SAID LEG MEANS THEREWITH, SAID GUIDEWAY SERVING TO GUIDE THE CONNECTION OF SAID LINK MEANS WITH SAID LEG MEANS DURING ARCUATE MOVEMENT OF SAID EXTENSION.