Test board for electronic circuits

Claim 1

AN ELECTRICAL DEVICE COMPRISING A TRANSPARENT MOUNTING PLACE, A PLURALITY OF COIL SPRINGS MOUNTED ON AN UPPER SURFACE OF SAID MOUNTING PLATE SO THAT THE AXES OF SAID SPRINGS EXTEND SUBSTANTIALLY NORMAL TO THE UPPER SURFACE OF SAID PLATE, SAID SPRINGS BEING ARRANGED IN A PLURALITY OF EQUALLY SPACED PARALLEL LATERAL ROWS AND A PLURALITY OF EQUALLY SPACED PARALLEL TRANSVERSE ROWS EXTENDING NORMAL TO SAID LATERAL ROWS SO AS TO FORM A PLURALITY OF RECTANGLES WITH ONE OF SAID SPRINGS AT ONE CORNER OF EACH RECTANGLE, A FRAME SUPPORTING SAID MOUNTING PLATE, A TRAY SLIDABLY AND REMOVABLY SUPPORTED ON SAID FRAME DIRECTLY BELOW AND PARALLEL TO SAID MOUNTING PLATE, SAID TRAY HAVING AN ELECTRICAL CIRCUIT DIAGRAM ON ITS SURFACE ADJACENT SAID MOUNTING PLATE, A PLURALITY OF ELECTRICAL CIRCUIT COMPONENTS ABOVE THE UPPER SURFACE OF SAID MOUNTING PLATE AND ABOVE THE COREESPONDING ELECTRICAL SYMBOLS OF SAID CIRCUIT DIAGRAM, EACH OF SAID COMPONENTS HAVING SPACED ENDS EXTENDING SUBSTANTIALLY PARALLEL TO SAID UPPER SURFACE, EACH OF SAID ENDS EXTENDING BETWEEN AND FRICTIONALLY GRIPPED BY ADJACENT CONVOLUTIONS OF ONE OF SAID COIL SPRINGS, WHEREBY SAID COMPONENTS MAY BE EASILY DETACHED FROM SAID SPRINGS.