Book holder

Claim 1

A FOLDABLE BOOK HOLDER, ADAPTED TO HOLD A BOOK IN OPEN POSITION FOR READING, COMPRISING A FRAME CONSISTING ESSENTIALLY OF A PAIR OF ELONGATED MEMBERS PIVOTALLY CONNECTED INTERMEDIATE THEIR ENDS AND NORMALLY CROSSED, WHEREBY THEY EXTEND VERTICALLY AND HORIZONTALLY, RESPECTIVELY, A BOOK REST ON A LOWER END PORTION OF THE VERTICALLY EXTENDING FRAME MEMBER HAVING A FORWARDLY EXTENDING PORTION ENGAGEABLE UNDER THE LOWER EDGE OF A BOOK SUPPORTED THEREON AND HAVING AN UPSTANDING PIN ENGAGEABLE BETWEEN THE OPEN PAGES OF THE BOOK, A BOOK RETAINING MEMBER SLIDABLY CONNECTED TO AN UPPER END PORTION OF THE VERTICALLY EXTENDING FRAME MEMBER FOR VERTICAL ADJUSTMENT RELATIVE TO THE BOOK REST, THE BOOK RETAINING MEMBER HAVING A FORWARDLY EXTENDING PORTION ENGAGEABLE OVER THE UPPER EDGE OF THE BOOK AND HAVING A DEPENDING PIN ENGAGEABLE BETWEEN THE OPEN PAGES OF THE BOOK, A PAIR OF LATERAL EXTENSIONS OF THE HORIZONTALLY EXTENDING FRAME MEMBER SLIDABLY CONNECTED TO OPPOSITE END PORTIONS THEREOF FOR LONGITUDINAL ADJUSTMENT RELATIVE THERETO, SAID LATERAL EXTENSIONS EACH HAVING A FORWARDLY EXTENDING PORTION ENGAGEABLE OVER THE ADJACENT SIDE EDGE OF THE BOOK AND AN INWARDLY TURNED, HORIZONTALLY EXTENDING FRONT END PORTION ENGAGEABLE OVER MARGINAL PORTIONS OF THE OPENED PAGES OF THE BOOK, SPRING MEANS SECURED TO THE VERTICALLY EXTENDING FRAME MEMBER ACTING ON UPPER AND LOWER PORTIONS OF THE SPINE OF THE BOOK WHEREBY IT IS YIELDABLY URGED IN ENGAGEMENT WITH THE UPSTANDING AND DEPENDING PINS, AND SPRING MEANS SECURED TO THE HORIZONTALLY EXTENDING FRAME MEMBER ACTING ON THE COVERS OF THE BOOK WHEREBY OPPOSITE SIDES OF THE BOOK ARE YIELDABLY URGED IN ENGAGEMENT WITH THE FRONT END PORTIONS OF SAID LATERAL EXTENSIONS.