Portable lectern

Claim 1

THE COLLAPSIBLE PORTABLE LECETERN READILY ATTACHABLE TO THE BACK REST OF A SEAT FOR USE IN SUPPORTING READING ARTICLES SUCH AS BOOKS, PAPERS AND THE LIKE, SAID LECTERN COMPRISING AN ARTICLE SUPPORTING MEMBER HAVING SUBSTANTIALLY FLAT PARALLEL UPPER AND LOWER SURFACES AND HAVING STRAIGHT FRONT AND REAR EDGES, A FRONT FLANGE ELEMENT AND REAR FLANGE ELEMENT AFFIXED TO AND EXTENDING FROM SAID ARTICLE SUPPORTING MEMBER IN CLOSE PROXIMITY TO THE FRONT AND REAR EDGES THEREOF RESPECTIVELY, A LEG MEMBER PIVOTALLY CONNECTED TO THE LOWER SURFACE OF SAID ARTICLE SUPPORTING MEMBER FOR PIVOTAL MOVEMENT RELATIVE THERETO ABOUT AN AXIS EXTENDING SUBSTANTIALLY NORMAL TO THE FRONT EDGE OF SAID ARTICLE SUPPORTING MEMBER BETWEEN A DEPENDING ERECT OPERATIVE POSITION AND COLLAPSED INOPERATIVE POSITION AGAINST THE LOWER SURFACE OF THE SAID ARTICLE SUPPORTING MEMBER, RELEASABLE LOCKING MEANS INTERCONNECTING SAID LEG MEMBER AND ARTICLE SUPPORTING MEMBER FOR RELEASABLY LOCKING SAID LEG MEMBER IN THE ERECT OPERATIVE POSITION, SAID LEG MEMBER HAVING SUBSTANTIALLY STRAIGHT FRONT EDGE SURFACE OF SAID LEG MEMBER AND THE LOWER SURFACE OF SAID ARTICLE SUPPORTING MEMBER TO PERMIT THE UPPER EDGE OF A CHAIR BACK TO BE ENGAGED AND GRIPPED THEREBY WHEREBY SAID LECTERN IS SUPPORTED FROM THE CHAIR IN ONE POSITION, AND SAID REAR FLANGE COOPERATING WITH THE REAR EDGE SURFACE OF SAID LEG MEMBER AND THE LOWER SURFACE OF SAID ARTICLE SUPPORTING MEMBER TO PERMIT THE UPPER EDGE OF A CHAIR BACK REST TO BE GRIPPED THEREBY WHEREBY SAID LECTERN MAY BE SELECTIVELY POSITIONED AND SUPPORTED FROM THE BACK REST OF A CHAIR IN ANOTHER POSITION, SAID ARTICLE SUPPORTING MEMBER BEING SUBSTANTIALLY HORIZONTALLY ORIENTED WHEN IN ONE OF SAID POSITIONS AND BEING INCLINED WITH RESPECT TO THE BACK REST IN THE OTHER OF SAID POSITIONS.