Extensible support column

Claim 1

AN EXTENSIBLE FURNITURE LEG CONSISTING OF A SUPPORT COLUMN HAVING A VERTICALLY EXTENDING AXIS AND COMPRISING (A) TWO COAXIALLY TELESCOPING ELONGATED MEMBERS ONE OF WHICH MEMBERS IS A TUBULAR MEMBER AND THE OTHER ONE IS SLIDABLE GUIDED IN THE TUBULAR MEMBER, (1) EACH OF SAID MEMBERS HAVING A PLURALITY OF FLAT SURFACES EXTENDING RECTILINEARLY IN THE DIRECTION OF THE COLUMN AXIS, SAID SURFACE DEFINING, RESPECTIVELY, INNER WALLS OF SAID ONE MEMBER AND OUTER WALLS OF SAID OTHER MEMBER, THE WALLS OF AT LEAST ONE OF SAID MEMBERS BEING ELASTICALLY DEFORMABLE ASSOCIATED ONES OF THE SURFACES OF THE TWO MEMBERS DEFINING RECTILINEARLY EXTENDING SPACES THEREBETWEEN, AND SAID SPACES BEING ARRANGED IN PAIRS OF DIAMETRICALLY OPPOSED SPACES; (B) A FURNITURE PART CARRIED BY THE OTHER MEMBER AT AN ADJUSTABLE DISTANCE FROM THE TUBULAR MEMBER; (C) ANTI-FRICTION ROLLER BEARING MEANS ARRANGED IN THE SPACED BETWEEN THE FIRST SURFACES OF THE TWO TELESCOPING MEMBERS AND MAKING LINE CONTACT THEREWITH, (2) THE ROLLERS OF THE ANIT-FRICTION BEARING MEANS BEING MOUNTED IN THE OPPOSED SPACES OF SAID PAIRS IN AXIALLY STAGGERED RELATIONSHIP AND ONE SPACE OF EACH OF SAID PAIRS OF SPACES HAVING ONE BEARING ROLLER LESS THAN THE OTHER ONE OF THE SPACES OF EACH OF SAID PAIRS, (3) EACH OF SAID ROLLERS BEING PRE-STRESSED; (D) BRAKE MEANS MOUNTED IN SAID COLUMN FOR TEMPORARILY FIXING THE SLIDABLY GUIDED COLUMN MEMBER IN SAID TUBULAR COLUMN MEMBER AND INCLUDING BRAKE SHOE MEANS MOUNTED ON SAID OTHER MEMBER AND FRICTIONALLY ENGAGEABLE WITH THE INNER WALLS OF SAID ONE TUBULAR MEMBER; AND (C) MEANS FOR ACTUATING THE BRAKE MEANS FROM OUTSIDE THE EXRENSIBLE COLUMN.