Linkage for drawing press

Claim 1

IN A LINKAGE FOR A DRAWING PRESS HAVING A ROTATABLE CRANKSHAFT, A FIRST CRANK SECURED THERETO, A RECIPROCALBE RAM, A FIRST ARM PIVOTALLY CONNECTED TO SAID FIRST CRANK AND A SECOND ARM HAVING ONE END PIVOTALLY CONNECTED TO SAID RAM AND A SECOND END HINGEDLY CONNECTED TO SAID FIRST ARM SO AS TO FORM A KNEE JOINT THEREWITH, THE IMPROVEMENT COMPRISING AN EXTENSION ARM RIGID WITH SAID FIRST ARM, DEFINING THEREWITH AN ABTUSE ANGLE AND EXTENDING BEYOND THE PIVOT POINT BETWEEN THE LATTER AND SAID FIRST CRANK, THE DISTANCE BETWEEN THE HINGE OF SAID KNEE JOINT AND THE REMOTE END OF SAID EXTENSION ARM BEING SMALLER THAN TWICE THE LENGTH OF SAID FIRST ARM, AND DRIVE MEANS CONNECTED BETWEEN SAID FIRST CRANK AND SAID REMOTE END OF THE EXTENSION ARM, AND OPERATIVE TO IMPART TO SAID KNEE JOINT A SUPPLEMENTAL MOTION IN A DIRECTION SUBSTANTIALLY PERPENDUCULAR TO A LINE CONNECTING SAID FIRST CRANK AND SAID RAM.