Undercarriage assembly for a rocking chair

Claim 1

IN ROCKING CHAIR AND LIKE UNDERCARRIAGES OF THE TYPE USING A PAIR OF LATERALLY-SPACED PHYSICALLY SEPARATE ROCKER ASSEMBLIES, AN IMPROVED ROCKER ASSEMBLY COMPRISING: (A) A PAIR OF MEMBERS, INCLUDING A BASE MEMBER AND A ROCKER MEMBER POSITIONED OVER AND SPACED UPWARDLY FROM THE BASE MEMBER; (B) AN X-SHAPED ARRANGEMENT OF REARWARDLY AND FORWARDLY DECLINING LEGS VERTICALLY ARRANGED BETWEEN SAID MEMBERS AND PIVOTALLY SECURED TO BOTH (1) SO AS TO MOUNT THE ROCKET MEMBER ON THE BASE MEMBER FOR RELATIVE FORWARD-BACKWARD ROCKING MOVEMENT (A) BETWEEN FRONT AND REAR EXTREMES ON OPPOSITE SIDES OF A NEUTRAL POSITION AND (B) ABOUT A PHANTOM TRANSVERSELY-EXTENDING HORIZONTAL AXIS; AND (C) DOUBLE ACTION SPRING MEANS VERTICALLY ARRANGED BETWEEN THE FRONT HALVES OF THE ROCKER PLATE AND BASE MEMBER AND RIGIDLY SECURED TO BOTH FOR TENSION AND COMPRESSION CUSHIONING PURPOSES, (1) SAID SPRING MEANS YIELDABLY URGING SAID LEGS TOWARD AND NORNALLY HOLDING THEM IN A NEUTRAL POSITION WHEREIN SAID PHANTOM AXIS IS OFFSET A SUBSTANTIAL DISTANCE REARWARDLY FROM A VERTICAL PLANE PASSING TRANSVERSELY THROUGH THE MID PORTION OF SAID BASE MEMBER.