Chair structure

Claim 1

IN COMBINATION WITH A CHAIR INCLUDING A CHAIR FRAME PROVIDING A PAIR OF FRONT LEGS, A PAIR OF REAR LEGS, AND A BACK REST, A TABLET ARM ASSEMBLY COMPRISING, A TABLET ARM, A PIVOTAL CONNECTION SECURING A REARWARD PORTION OF SAID TABLET ARM TO SAID BACK REST ADJACENT ONE SIDE OF THE CHAIR FOR RELATIVE MOVEMENT ABOUT A PAIR OF TRANSVERSE AXES, AND MEANS CONNECTING A FORWARD PORTION OF SAID TABLET ARM TO SAID FRAME COMPRISING A SUPPORT MEMBER CARRIED AT ITS LOWER END BY THE FRAME FOR SWINGING MOVEMENT THROUGH A GENERALLY VERTICAL PLANE ALONG SAID ONE SIDE OF THE CHAIR FROM A GENERALLY VERTICAL POSITION AND IN A DIRECTION TOWARD SAID BACK REST TO A REARWARDLY INCLINED POSITION, AND A UNIVERSAL CONNECTION BETWEEN THE TABLET ARM AND SAID SUPPORT MEMBER INCLUDING A BEARING MEANS ON THE UNDERSIDE OF SAID TABLET ARM, A YOKE-LIKE ELEMENT CONNECTED WITH SAID BEARING MEANS FOR PIVOTAL MOVEMENT ABOUT AN AXIS DISPOSED AT RIGHT ANGLES TO THE PLANE OF SAID TABLET ARM, A SLEEVE ELEMENT SLIDABLY ENGAGING SAID SUPPORT MEMBER FOR MOVEMENT AXIALLY THEREOF AND CONNECTED WITH SAID YOKE-LIKE ELEMENT FOR RELATIVE PIVOTAL MOVEMENT ABOUT AN AXIS TRANSVERSE TO AND SPACED FROM THE AXIS OF THE SLEEVE AND SUPPORT MEMBER, WHEREBY SAID TABLET ARM MAY BE ROTATED ABOUT SAID TRANSVERSE AXIS OF SAID UNIVERSAL CONNECTION AND ONE OF SAID AXES OF SAID REARWARD PIVOTAL CONNECTION TO MOVE BETWEEN A GENERALLY HORIZONTAL POSITION OF USE AND A GENERALLY VERTICAL POSITION ALONG SAID ONE SIDE OF THE CHAIR, AND WHEN IN SAID GENERALLY VERTICAL POSITION THE TABLET ARM MAY BE MOVED VERTICALLY DOWNWARD ABOUT THE OTHER TRANSVERSE AXIS OF SAID REARWARD PIVOTAL CONNECTION AND SAID AXIS OF SAID BEARING MEANS TO CAUSE SAID SLEEVE TO SLIDE ALONG SAID SUPPORT MEMBER AND PLACE SAID TABLET ARM IN ITS LOWERED POSITION ALONGSIDE THE CHAIR WITH SAID SUPPORT MEMBER DISPOSED IN ITS REARWARDLY INCLINED POSITION WITH RESPECT TO ITS CONNECTION WITH SAID FRAME, AND A BIASING MEANS IN POSITION TO URGE THE ADJOINING SURFACES OF SAID BEARING MEANS AND YOKELIKE ELEMENT TOGETHER TO RESIST RELATIVE ROTATION THEREBETWEEN, WHEREBY SAID TABLET ARM IS MAINTAINED IN ANY SELECTED POSITION ALONG SAID SUPPORT MEMBER WHEN THE TABLET ARM IS POSITIONED IN SAID GENERALLY VERTICAL POSITION ALONG SAID ONE SIDE OF THE CHAIR.