Compactly stackable chair

Claim 1

A STACKABLE LIGHTWEIGHT CHAIR COMPRISING FRAME MEANS PROVIDING (1) A PAIR OF SUBSTANTIALLY PARALLEL MEMBER EACH BENT TO PROVIDE A SIDE RAIL, A FRONT LEG, A BOTTOM RAIL, AND A REAR LEG, SAID BOTTOM RAIL BEING JOINED BY AN OFFSETTING PORTION TO THE BOTTOM OF SAID FRONT LEG, (2) A FRONT REINFORCING MEMBER EXTENDING BETWEEN AND WELDED TO SAID LEGS, AND (3) A REINFORCING MEMBER WELDED TO THE REAR LEGS AND SIDE RAILS AND CONNECTING THE REAR LEGS TO EACH OTHER AND SPACING THEM FROM THE SIDE RAILS, SEAT AND BACK MEMBERS SECURED TO AND CARRIED BY THE FRAME MEANS OF EACH SAID CHAIR, AND MEANS FOR STIFFENING EACH OTHER SAID REAR LEG INCLUDING A FRAME PORTION ENLARGED IN CROSS-SECTIONAL AREA, EXTENDING LATERALLY OF SAID FRAME A SUBSTANTIAL DISTANCE BOTHE ABOVE AND BELOW THE CONNECTION BETWEEN SAID REAR LEGS AND SAID REAR REINFORCING MEMBER, SAID FRONT REINFORCING MEMBER BEING DIFFERENT IN THICKNESS FROM SAID FRONT LEGS, POSITIONED BELOW SAID SIDE RAILS AND PROVIDING A DIFFERENT NATURAL FREQUENCY OF VIBRATION THUS CONSTITUTING A VIBRATION DAMPER, THEREBY PROTECTING THE WELDED ASSEMBLY FROM THE BREAKAGE DUE TO THE DEVELOPMENT OF VIBRATIONS WHEN A CHAIR IS DROPPED OR STRUCK A HARD BLOW.