Foldable tablet assembly

Claim 1

A FOLDABLE TABLET ASSEMBLY FOR USE WITH A CHAIR UNIT HAVING A SUBSTANTIALLY HORIZONTALLY DISPOSED SEAT, SAID ASSEMBLY HAVING, IN COMBINATION, A SUPPORT, AN ARM FULCRUMED ON SAID SUPPORT FOR SWINGING ABOUT A HORIZONTAL AXIS BETWEEN UPPER AND LOWER POSITIONS, A TABLET HAVING A RELATIVELY WIDE WRITING PORTION AND A NARROWER NECK PORTION EXTENDING FROM SAID WRITING PORTION, A PIVOT MEMBER DISPOSED IN A SUBSTANTIALLY HORIZONTAL POSITION WHEN SAID ARM IS IN SAID UPPER POSITION AND MOUNTING SAID TABLET ON SAID ARM FOR SWINGING ABOUT A SECOND SUBSTANTIALLY HORIZONTAL AXIS TRANSVERSE TO SAID FIRST AXIS BETWEEN A SUBSTANTIALLY HORIZONTAL WRITING POSITION IN WHICH AID WRITING PORTION OVERLIES THE SEAT AND A RAISED POSITION IN WHICH SAID WRITING PORTION IS SPACED LATERALLY OF AND ABOVE ONE EDGE OF THE SEAT, SAID TABLET AND SAID PIVOT MEMBER BEING MOVABLE BODILY WITH SAID ARM AS THE LATTER IS SWUNG BETWEEN SAID UPPER AND LOWER POSITIONS WHEREBY THE TABLET IS SWINGABLE EDGEWISE BETWEEN SAID RAISED POSITION AND A LOWERED POSITION IN WHICH SAID WRITING PORTION IS SPACED LATERALLY OF AND BELOW THE SEAT, SAID PIVOT MEMBER BEING DISPOSED IN AN UPRIGHT POSITION WHEN SAID ARM IS IN SAID LOWER POSITION AND MOUNTING SAID TABLET FOR TURNING RELATIVE TO SAID ARM BETWEEN SAID LOWERED POSITION AND A STORED POSITION IN WHICH SAID WRITING PORTION UNDERLIES THE SEAT, A GUIDE RIB ON SAID SUPPORT AND ARCUATELY CURVED ABOUT SAID FIRST AXIS, A PLATE HAVING THE SHAPE OF A HELIX TURNABLE WITH SAID TABLET AND ENGAGEABLE WITH SAID RIB TO RESTRICT SWINGING OF SAID ARM BETWEEN SAID UPPER AND LOWER POSITIONS WHILE SAID TABLET IS BEING TURNED TOWARD AND AWAY FROM SAID WRITING AND STORED POSITIONS, SAID PLATE HAVING ONE EDGE THEREOF ALINED WITH SAID RIB WHEN SAID TABLET IS IN SAID RAISED AND LOWERED POSITIONS TO LEAVE SAID ARM FREE FOR SWINGING MOVEMENT BETWEEN SAID UPPER AND LOWER POSITIONS, SAID EDGE OVERLYING AND BEING SLIDABLE ALONG AND ENGAGEABLE WITH SAID RIB WHILE SAID ARM IS BEING SWUNG BETWEEN SAID UPPER AND LOWER POSITIONS TO RESTRICT TURNING OF SAID TABLET RELATIVE TO SAID ARM AND TO MAINTAIN THE TABLET SPACED LATERALLY FROM THE ONE EDGE OF THE CHAIR, AND MEANS ON SAID SUPPORT COACTING WITH SAID PLATE AND OPERABLE TO CAUSE SAID TABLET TO TURN FROM SAID LOWERED POSITION TO SAID STORED POSITION AUTOMATICALLY AS AN INCIDENT TO SAID ARM REACHING SAID LOWER POSITION.