Tracing device

Claim 1

A DRAWING DEVICE COMPRISING A STAND FORMED FROM A MOLDED PLASTIC FRAME HAVING SIDE AND BACK AND FRONT WALLS AND A PLANAR TOP, THE SIDE WALLS BEING RIBBED TO ADD RIGIDITY, A RECTANGULAR OPENING IN THE PLANAR TOP, SAID OPENING BEING DEFINED BY DOWNWARDLY DEPENDING FLANGES OF UNIFORM DEPTH AROUND THE OPENING, SAID FLANGES BEING PROVIDED ALONG THEIR LOWER EDGE WITH AN INWARDLY EXTENDING LEDGE, A TRANSLUCENT PLASTIC DRAWING PANEL INSERTED IN THE OPENING OF THE FRAME, SAID PANEL BEING IN THE FORM OF A SHALLOW INVERTED PAN HAVING DEPENDING SIDE WALLS AND A TOP PLANAR DRAWING SURFACE OF THE SAME DIMENSIONS AS THE RECTANGULAR OPENING, THE SIDE WALLS HAVING THE SAME DEPTH AS THE DEPTH OF THE FLANGES AROUND THE OPENING ABOVE THE PROTRUDING LEDGE, SPRING FINGERS FORMED IN THE DRAWING PANEL SIDE WALLS, SAID FINGERS BEING FORMED BY SLOTS EXTENDING AT LEAST PARTIALLY UP THE SIDEWALLS OF THE PAN, EACH SUCH SPRING FINGER HAVING A PROTRUDING NIB ON THE OUTER SURFACE THEREOF, THE FLANGES AROUND THE OPENING OF THE FRAME BEING PROVIDED WITH OPENINGS SPACED SO AS TO RECEIVE THE PROTRUDING NIBS THEREIN WHEN THE DRAWING PANEL IS IN PLACE IN THE OPENING WITH ITS TOP SURFACE LEVEL WITH THE TOP OF THE FRAME AND WITH THE LOWER EDGES OF ITS WALLS RESTING ON THE LEDGES OF THE FLANGES, A BACK PANEL EXTENDING BETWEEN AND ATTACHED TO THE OPPOSED SIDEWALLS OF THE FRAME, SAID PANEL HAVING A CENTRAL PORTION EQUAL IN LENGTH TO THE DISTANCE BETWEEN SAID SIDE WALLS, AND A WIDTH SUCH THAT THE SIDE EDGES ARE SUBSTANTIALLY SPACED FROM THE FRONT AND BACK WALLS, UPSTANDING PARALLEL FLANGES AT THE LONGITUDINAL EXTREMITIES OF THE CENTRAL PORTION, AND CONNECTOR MEANS ATTACHING THE PARALLEL FLANGES TO THE INNER SURFACES OF SAID SIDE WALLS AND LIGHT SOURCE MEANS MOUNTED ON A LIGHT SOCKET FIXED TO THE PANEL BETWEEN THE BACK PANEL AND THE TOP SIDE OF THE FRAME.