Sofa-bed

Claim 1

IN AN EXTENSIBLE COLLAPSIBLE BED, A CHASSIS, A REAR THROW-OUT MEMBER PIVOTED TO SAID CHASSIS AND INCLINED UPWARDLY AND FORWARDLY IN THE EXTENDED CONDITION OF THE BED, A MAIN LEVER PIVOTED TO SAID CHASSIS AND HAVING AN ARM PROJECITNG DOWNWARDLY AND AN ARM PROJECTING UPWARDLY AND REARWARDLY IN THE EXTENDED CONDITION OF THE BED, A MAIN TENSION SPRING CONNECTING SAID DOWNWARDLY PROJECTING ARM WITH SAID CHASSIS, A FIRST CONTROL LINK CONNECTING SAID UPWARDLY PROJECTING ARM WITH SAID THROW-OUT MEMBER, A THREE SECTION COLLAPSIBLE BED COMPRISING A REAR BED SECTION, AN INTERMEDIATE BED SECTION PIVOTED TO THE FRONT END OF SAID REAR BED SECTION, AND A FRONT BED SECTION PIVOTED TO THE FRONT END OF SAID INTERMEDIATE BED SECTION, SAID THREE SECTIONS, BEING IN ALIGNMENT, IN THE EXTENDED CONDITION OF THE BED, A REAR LEG PIVOTED TO THE REAR BED SECTION, A FRONT LEG PIVOTED TO SAID FRONT BED SECTION, A BELL CRANK PIVOTED TO SAID REAR BED SECTION AND HAVING A DOWNWARDLY EXTENDING ARM AND A FORWARDLY EXTENDING ARM, AND A SECOND CONTROL LINK CONNECTING SAID FORWARDLY EXTENDING ARM OF SAID BELL-CRANK WITH SAID THROW-OUT MEMBER, SAID BED BEING FULLY COLLAPSIBLE TO A POSITION IN WHICH THE REAR BED SECTION IS DOWN, THE IN TERMEDIATE BED SECTION EXTENDS UP FROM THE FRONT END OF SAID REAR SECTION, AND SAID FRONT SECTION IS LOCATED ABOVE THE REAR SECTION AND EXTENDS REARWARDLY FROM THE UPPER END OF SAID INTERMEDIATE SECTION, AND SAID REAR THROW-OUT LINK EXTENDING DOWNWARDLY AND REARWARDLY FROM ITS PIVOTAL CONNECTION TO SAID CHASSIS, IN THE COLLAPSED CONDITION OF SAID BED.